CN210224230U - Battery temperature-raising circuit and battery pack - Google Patents
Battery temperature-raising circuit and battery pack Download PDFInfo
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- CN210224230U CN210224230U CN201921382626.8U CN201921382626U CN210224230U CN 210224230 U CN210224230 U CN 210224230U CN 201921382626 U CN201921382626 U CN 201921382626U CN 210224230 U CN210224230 U CN 210224230U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a battery intensification circuit and battery pack. The battery warming circuit comprises a temperature monitoring module, a logic judgment module, a switch module and a heating module. The temperature monitoring module comprises a first voltage comparator and a second voltage comparator, the first voltage comparator is used for comparing the current temperature of the battery with the first preset temperature, the second voltage comparator is used for comparing the current temperature of the battery with the second preset temperature, and the second preset temperature is greater than the first preset temperature. The logic judgment module is respectively electrically connected with the temperature monitoring module and the switch module and is used for controlling the switch module to be turned on when the current temperature of the battery is less than or equal to a first preset temperature and controlling the switch module to be turned off when the current temperature of the battery is greater than a second preset temperature; the heating module is electrically connected with the switch module and used for heating the battery when the switch module is started. The utility model provides a battery intensification circuit and battery pack are high-efficient, practical and the cost is lower.
Description
Technical Field
The embodiment of the utility model provides a relate to battery management technical field, especially relate to a battery intensification circuit and battery pack.
Background
Battery (Battery) refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or portion of a composite container that holds an electrolyte solution and metal electrodes to generate an electric current. The battery is used as an energy source, can obtain current with stable voltage and current, stable power supply for a long time and little influence from the outside, has simple structure, convenient carrying, simple and easy charging and discharging operation and stable and reliable performance, and plays a great role in various aspects of modern social life.
In a low-temperature environment, the viscosity of an electrolyte of a power supply battery on equipment such as a new energy automobile and a mobile terminal is reduced, and the problems of increase of internal resistance of the battery, increase of power consumption, sudden capacity reduction and the like easily occur. At present, the following solutions are provided for the problem of the battery in the low temperature environment:
1. through adding special active molecule in battery electrolyte, promote the activity of battery under the low temperature condition, arouse the power supply ability, but the ability that this mode promoted is limited, and the effect is not good.
2. And a low-temperature-resistant lithium ion battery is adopted. However, such a battery is expensive and not suitable for use in a mobile terminal or a new energy automobile.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery intensification circuit and battery pack to realize the automatic intensification of battery under the low temperature condition, guarantee the normal work of battery under the low temperature condition, this battery intensification circuit and battery pack are high-efficient, practical and the cost is lower.
In a first aspect, an embodiment of the present invention provides a battery warming circuit, which includes a temperature monitoring module, a logic determining module, a switch module, and a heating module;
the temperature monitoring module is used for monitoring the temperature of the battery;
the temperature monitoring module comprises a first voltage comparator and a second voltage comparator, wherein the first voltage comparator is used for comparing the current temperature of the battery with a first preset temperature, the second voltage comparator is used for comparing the current temperature of the battery with a second preset temperature, and the second preset temperature is greater than the first preset temperature;
the logic judgment module is respectively electrically connected with the temperature monitoring module and the switch module and is used for controlling the switch module to be switched on when the current temperature of the battery is less than or equal to a first preset temperature and controlling the switch module to be switched off when the current temperature of the battery is greater than a second preset temperature;
the heating module is electrically connected with the switch module and used for heating the battery when the switch module is started.
Optionally, the temperature monitoring module further includes a first resistor, a second resistor, a third resistor, a temperature sensing unit, a fourth resistor, and a fifth resistor;
a first end of the second resistor, a first end of the third resistor and a first end of the fifth resistor are electrically connected with a first power supply, a second end of the second resistor is electrically connected with the first end of the first resistor and an inverting input end of the first voltage comparator respectively, a second end of the third resistor is electrically connected with the first end of the temperature sensing unit, a non-inverting input end of the first voltage comparator and an inverting input end of the second voltage comparator respectively, and a second end of the fifth resistor is electrically connected with a first end of the fourth resistor and a non-inverting input end of the second voltage comparator respectively;
the second end of the first resistor, the second end of the temperature sensing unit and the second end of the fourth resistor are grounded;
the power supply input end of the first voltage comparator is electrically connected with a second power supply, the grounding end of the first voltage comparator is grounded, the power supply input end of the second voltage comparator is electrically connected with the second power supply, and the grounding end of the second voltage comparator is grounded;
the output end of the first voltage comparator and the output end of the second voltage comparator are both electrically connected with the logic judgment module.
Optionally, the logic judgment module includes an or logic gate unit;
the first input end of the OR logic gate unit is electrically connected with the output end of the first voltage comparator, the second input end of the OR logic gate unit is electrically connected with the output end of the second voltage comparator, and the output end of the OR logic gate unit is electrically connected with the switch module.
Optionally, the logic determining module further includes: an AND logic gate unit and a trigger unit;
the first input end of the AND logic gate unit is electrically connected with the output end of the first voltage comparator, the second input end of the AND logic gate unit is electrically connected with the trigger unit, and the output end of the AND logic gate unit is electrically connected with the first input end of the OR logic gate unit.
Optionally, the logic judgment module further includes an electric quantity monitoring module, and the and logic gate unit further includes a third input end;
and the third input end of the logic gate unit is electrically connected with the electric quantity monitoring module.
Optionally, the switch module includes a power input terminal, a control terminal, and a power output terminal;
the power input end is used for being electrically connected with the battery, the control end is electrically connected with the logic judgment module, and the power output end is electrically connected with the heating module.
Optionally, the heating module is a heating film.
Optionally, the heating temperature of the heating module is T1, and the second preset temperature is T3, where T1 is not less than T3.
In a second aspect, an embodiment of the present invention further provides a battery assembly, including a battery and any one of the battery temperature increasing circuits of the first aspect;
also included are phase change materials;
the phase change material is attached to the battery.
Optionally, the phase transition temperature of the phase change material is T4, the first preset temperature is T2, and the second preset temperature is T3, where T4 is not less than T2 and not more than T3.
According to the technical scheme provided by the embodiment of the utility model, the first voltage comparator compares the current battery temperature with the first preset temperature, the second voltage comparator compares the current battery temperature with the second preset temperature, when the current battery temperature is less than or equal to the first preset temperature, the logic judgment module controls the switch module to be opened, and at the moment, the heating module heats the battery; if the temperature of current battery is greater than the second and predetermines logical judgment module control switch module and close when the temperature, at this moment, heating module stop heating to realized the automatic intensification of battery under the low temperature condition, solved lithium ion battery and reduced at low temperature activity, the technical problem that battery capacity can not be aroused, the embodiment of the utility model provides a battery intensification circuit has guaranteed that the battery normally works under the low temperature condition when, high efficiency, practicality and cost are less than the low temperature resistant lithium cell among the prior art, realize the volume production easily.
Drawings
Fig. 1 is a schematic structural diagram of a battery temperature increasing circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another battery temperature increasing circuit provided in an embodiment of the present invention;
fig. 3 is a schematic flow chart of a battery temperature increasing method according to an embodiment of the present invention;
fig. 4 is a schematic front structural diagram of a battery assembly according to an embodiment of the present invention;
fig. 5 is a schematic side view of a battery assembly according to an embodiment of the present invention;
fig. 6 is a schematic view of a back structure of a battery module according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is the embodiment of the present invention provides a structural schematic diagram of a battery warming circuit, as shown in fig. 1, an embodiment of the present invention provides a battery warming circuit including a temperature monitoring module 11, a logic determining module 12, a switch module 13 and a heating module 14. The temperature monitoring module 11 is configured to monitor a temperature of the battery 15, where the temperature monitoring module 11 includes a first voltage comparator 111 and a second voltage comparator 112, the first voltage comparator 111 is configured to compare the current temperature of the battery 15 with a first preset temperature, the second voltage comparator 112 is configured to compare the current temperature of the battery 15 with a second preset temperature, and the second preset temperature is greater than the first preset temperature. The logic judgment module 12 is electrically connected to the temperature monitoring module 11 and the switch module 13, and is configured to control the switch module 13 to be turned on by the logic judgment module 12 when the current temperature of the battery 15 is less than or equal to a first preset temperature, and control the switch module 13 to be turned off by the logic judgment module 12 when the current temperature of the battery 15 is greater than a second preset temperature. The heating module 14 is electrically connected to the switch module 13 for heating the battery 15 when the switch module 13 is turned on.
The embodiment of the utility model provides a technical scheme, through the size of first voltage comparator 111 than current battery 15's temperature and first preset temperature, second voltage comparator 112 is than current battery 15's temperature and the size of second preset temperature, if when current battery 15's temperature is less than or equal to first preset temperature logical judgment module 12 control switch module 13 opens, at this moment, heating module 14 heats for battery 15; if logic judgment module 12 control switch module 13 is closed when the temperature of current battery 15 is greater than the second preset temperature, at this moment, heating module 14 stop heating to realized battery 15's automatic rising temperature under the low temperature condition, solved lithium ion battery 15 activity reduction at low temperature, the technical problem that battery 15 capacity can not be aroused, the embodiment of the utility model provides a battery intensification circuit has guaranteed battery 15 when normally working under the low temperature condition, and high efficiency, practicality and cost are less than the low temperature resistant lithium cell among the prior art, realize the volume production easily.
With continued reference to fig. 1, optionally, the temperature monitoring module 11 further includes a first resistor R1, a second resistor R2, a third resistor R3, a temperature sensing unit 113, a fourth resistor R4, and a fifth resistor R5. The first end 21 of the second resistor R2, the first end 31 of the third resistor R3, and the first end 51 of the fifth resistor R5 are electrically connected to the first power source V1, the second end 22 of the second resistor R2 is electrically connected to the first end 61 of the first resistor R1 and the inverting input terminal 72 of the first voltage comparator 111, respectively, the second end 32 of the third resistor R3 is electrically connected to the first end 91 of the temperature sensing unit 113, the non-inverting input terminal 71 of the first voltage comparator 111, and the inverting input terminal 82 of the second voltage comparator 112, respectively, and the second end 52 of the fifth resistor R5 is electrically connected to the first end 41 of the fourth resistor R4 and the non-inverting input terminal 81 of the second voltage comparator 112, respectively. The second end 62 of the first resistor R1, the second end 92 of the temperature sensing unit 113, and the second end 42 of the fourth resistor R4 are grounded. The power input terminal 74 of the first voltage comparator 111 is electrically connected to the second power supply V2, the ground terminal 75 of the first voltage comparator 111 is grounded, the power input terminal 84 of the second voltage comparator 112 is electrically connected to the second power supply V2, and the ground terminal 85 of the second voltage comparator 112 is grounded. The output terminal 73 of the first voltage comparator 111 and the output terminal 83 of the second voltage comparator 112 are both electrically connected to the logic determination module 12.
The first resistor R1 and the second resistor R2 divide voltage, and a first preset temperature can be set by setting the resistance values of the first resistor R1 and the second resistor R2; the fourth resistor R4 and the fifth resistor R5 divide voltage, and a second preset temperature can be set by setting the resistance values of the fourth resistor R4 and the fifth resistor R5; the third resistor R3 and the temperature sensing unit 113 divide the voltage, and the temperature sensing unit 113 converts the temperature information of the battery 15 into a divided voltage parameter. The first voltage comparator 111 compares the divided voltage of the temperature sensing unit 113 with the divided voltage of the first resistor R1 to compare the current temperature of the battery 15 with a first preset temperature, and the second voltage comparator 112 compares the divided voltage of the temperature sensing unit 113 with the divided voltage of the fourth resistor R4 to compare the current temperature of the battery 15 with a second preset temperature, thereby monitoring the temperature of the battery 15.
Optionally, the temperature sensing unit 113 is a thermistor, which is a type of sensing element, and is sensitive to temperature, and shows different resistance values at different temperatures, so that the thermistor can convert temperature information into a divided voltage parameter in the battery temperature increasing circuit, and the first voltage comparator 111 and the second voltage comparator 112 receive the divided voltage parameter, thereby implementing comparison between the current temperature of the battery 15 and the first preset temperature and the second preset temperature. The temperature sensing unit 113 may also be a temperature acquisition element such as a thermocouple, a Resistance Temperature Detector (RTD), an integrated circuit temperature sensor, etc., and those skilled in the art can obviously change, adjust and replace the temperature acquisition element without departing from the protection scope of the present invention.
Illustratively, the temperature sensing unit 113 is a negative temperature coefficient thermistor (NTC) whose resistance value is lower as the temperature is higher. If the current temperature of the battery 15 is less than or equal to the first preset temperature, the resistance of the negative temperature coefficient thermistor is larger, and the divided voltage of the negative temperature coefficient thermistor is greater than the divided voltage of the first resistor R1, at this time, the first voltage comparator 111 outputs a high level, the logic judgment module 12 controls the switch module 13 to be turned on, and the heating module 14 heats the battery 15; the temperature of the battery 15 starts to rise, when the temperature of the battery 15 is higher than the first preset temperature and lower than the second preset temperature, the divided voltage of the ntc thermistor is lower than the divided voltage of the first resistor R1, and at this time, the first voltage comparator 111 outputs a low level; when the temperature of the battery 15 is higher than the second preset temperature, the resistance of the ntc thermistor becomes smaller, the divided voltage of the temperature sensing unit 113 is lower than the divided voltage of the fourth resistor R4, at this time, the second voltage comparator 112 outputs a high level, the logic judgment module 12 controls the switch module 13 to be turned off, and the heating module 14 stops heating, so that the temperature of the battery 15 is not too high. The voltage of the first power source V1 may be 1.8V, the voltage of the second power source V2 may be 3V, and the second power source V2 is used to supply power to the first voltage comparator 111 and the second voltage comparator 112.
With continued reference to fig. 1, optionally, the logic decision module 12 includes an or logic gate unit 121. The first input 1211 of the or logic gate unit 121 is electrically connected to the output terminal 73 of the first voltage comparator 111, the second input 1212 of the or logic gate unit 121 is electrically connected to the output terminal 83 of the second voltage comparator 112, and the output 1213 of the or logic gate unit 121 is electrically connected to the switch module 13.
Illustratively, the temperature sensing unit 113 is a negative temperature coefficient thermistor (NTC), if the first voltage comparator 111 outputs a high level when the current temperature of the battery 15 is less than or equal to a first preset temperature, or the logic gate unit 121 outputs a high level to control the switch module 13 to be turned on, and the heating module 14 heats the battery 15; when the temperature of the battery 15 is higher than the first preset temperature and lower than the second preset temperature, the divided voltage of the ntc thermistor is lower than the divided voltage of the first resistor R1, and the divided voltage of the ntc thermistor is higher than the divided voltage of the fourth resistor R4, at this time, the first voltage comparator 111 outputs a low level, the second voltage comparator 112 outputs a low level, or the logic gate unit 121 outputs a low level, the switch module 13 is kept on, and the heating module 14 continues to heat the battery 15; when the temperature of the battery 15 is higher than the second preset temperature, the second voltage comparator 112 outputs a high level, or the logic gate unit 121 outputs a high level, the switch module 13 is turned off due to receiving the high level again, and the heating module 14 stops heating, so that the temperature of the battery 15 is not too high. The embodiment of the utility model provides a battery intensification circuit passes through or logic gate unit 121 and realizes opening and closing according to current battery 15 and when first predetermineeing the temperature and with the big or small relation control switch module 13 of second predetermined temperature.
Fig. 2 is a schematic structural diagram of another battery temperature increasing circuit provided in an embodiment of the present invention, as shown in fig. 2, optionally, the logic determining module 12 further includes: and logic gate unit 122 and trigger unit 123. The first input terminal 1221 of the and logic gate unit 122 is electrically connected to the output terminal 73 of the first voltage comparator 111, the second input terminal 1222 of the and logic gate unit 122 is electrically connected to the trigger unit 123, and the output terminal 1224 of the and logic gate unit 122 is electrically connected to the first input terminal 1211 of the or logic gate unit 121.
Specifically, when the current temperature of the battery 15 is less than or equal to the first preset temperature and the trigger unit 123 is triggered, that is, the first voltage comparator 111 outputs a high level and the trigger unit 123 outputs a high level, the and logic gate unit 122 outputs a high level, so that the or logic gate unit 121 outputs a high level, and the switch module 13 is controlled to be turned on, so that the heating module 14 heats the battery 15, thereby facilitating the control of the operation of the battery warming circuit and avoiding the waste of resources. The triggering manner of the triggering unit 123 is not exclusive, and for example, the triggering unit 123 is a switch, and is triggered manually, and those skilled in the art can make obvious changes, adjustments and substitutions without departing from the protection scope of the present invention.
With continued reference to fig. 2, optionally, the logic determining module 12 further includes a power monitoring module 124, and the and logic gate unit 122 further includes a third input terminal 124. The third input 124 of the and logic gate unit 122 is electrically connected to the power monitoring module 124.
Specifically, the electric quantity monitoring module 124 is configured to detect and determine whether the electric quantity of the current battery 15 is greater than a preset electric quantity value, and if the electric quantity of the current battery 15 is greater than the preset electric quantity value, the electric quantity monitoring module 124 outputs a high level. When the current temperature of the battery 15 is less than or equal to the first preset temperature, the trigger unit 123 is triggered, and the electric quantity of the battery 15 is greater than the preset electric quantity value, that is, the first voltage comparator 111 outputs a high level, the trigger unit 123 outputs a high level, and the electric quantity monitoring module 124 outputs a high level, the and logic gate unit 122 outputs a high level, so that the or logic gate unit 121 outputs a high level, the switch module 13 is controlled to be turned on, the heating module 14 heats the battery 15, the battery 15 is prevented from being over-discharged, and the battery 15 is prevented from being damaged.
With continued reference to fig. 1 and 2, optionally, the switch module 13 includes a power input 131, a control 132, and a power output 133. The power input end 131 is electrically connected to the battery 15, the control end 132 is electrically connected to the logic determination module 12, and the power output end 133 is electrically connected to the heating module 14.
Specifically, when the control end 132 receives the high level, the switch module 13 is turned from the off state to the on state, or from the on state to the off state; when the control terminal 132 receives a low level, the state remains unchanged. For example, if the current temperature of the battery 15 is less than or equal to the first preset temperature, the logic judgment module 12 outputs a high level, at this time, the control switch module 13 is turned on, at this time, the battery 15 supplies power to the heating module 14, so that the heating module 14 heats the battery 15; the temperature of the battery 15 is gradually increased, when the temperature of the battery 15 is greater than a first preset temperature and less than a second preset temperature, the logic judgment module 12 outputs a low level, the switch module 13 is kept on, the battery 15 continues to supply power to the heating module 14, and the heating module 14 continues to heat the battery 15; when the temperature of the battery 15 is higher than the second preset temperature, the logic judgment module 12 outputs a high level, the switch module 13 is turned off due to receiving the high level again, the battery 15 is disconnected from the heating module 14, and the heating module 14 stops heating, so that the heating module 14 is controlled to heat the battery 15 by turning on and off the switch module 13.
Optionally, the heating module 14 is a heating film. Wherein, the heating film can make battery 15 be heated evenly, and heating effect is better, and heating module 14 also can be for the heating resistor silk to reduce cost, the technical personnel in the field can carry out obvious change, adjustment and substitution to this and do not deviate from the utility model discloses a protection scope.
Optionally, the heating temperature of the heating module 14 is T1, and the second preset temperature is T3, where T1 is greater than or equal to T3.
Illustratively, the second predetermined temperature T3 is 25 deg.C, 25 deg.C T1 is 60 deg.C, so that the battery 15 can be warmed up as quickly as possible under low temperature conditions. The second preset temperature may be an upper limit value of the working temperature of the battery 15, and may also be adjusted according to actual requirements.
Exemplarily, fig. 3 is a schematic flow chart of a battery warming method according to an embodiment of the present invention, as shown in fig. 3, the first preset temperature is 0 ℃, the second preset temperature is 25 ℃, and the preset electric quantity value is 20%. When the triggering unit 123 is triggered, the electric quantity of the battery 15 is greater than 20%, and the temperature of the battery 15 detected by the temperature sensing unit 113 is less than or equal to 0 ℃, the switch module 13 is turned on, the battery warming circuit turns on the warming mode, and the heating module 14 starts to heat the battery 15; if the temperature of the battery 15 detected by the temperature sensing unit 113 is less than or equal to 25 ℃, the heating module 14 continuously heats the battery 15, the temperature monitoring module 11 monitors the temperature of the battery 15 in real time, and if the temperature of the battery 15 detected by the temperature sensing unit 113 is greater than 25 ℃, the switch module 13 is closed, and the battery warming circuit closes the warming mode, so that the automatic warming of the battery 15 under the low temperature condition is realized, and the normal work of the battery 15 under the low temperature condition is ensured.
Based on same inventive concept, the embodiment of the present invention also provides a battery assembly, including any battery warming circuit that battery and the above-mentioned embodiment provided, the explanation of the same or corresponding structure and term with the above-mentioned embodiment is no longer repeated here, fig. 4 is the utility model discloses a battery assembly's that the embodiment provides positive structure schematic diagram, fig. 5 is the utility model discloses a battery assembly's that the embodiment provides side structure schematic diagram, fig. 6 is the utility model discloses a battery assembly's that the embodiment provides back structure schematic diagram, as shown in fig. 4, fig. 5 and fig. 6, the utility model provides a battery assembly still includes phase change material 16. The phase change material 16 is attached to the battery 15.
When the battery 15 is in a low-temperature environment, the heating module 14 is started to heat the battery 15, and the phase-change material 16 attached to the battery 15 can be used as an energy storage material to absorb part of redundant heat, so that the battery 15 is kept warm in the low-temperature environment; when the battery 15 is at a high temperature, the phase change material 16 can absorb heat by using latent heat to perform auxiliary heat dissipation, and meanwhile, the temperature uniformity of the battery 15 is improved. The embodiment of the utility model provides a battery pack, through add phase change material 16 on battery 15, the heat that can make full use of heating module 14 send reduces battery 15's power consumption, and the heat of solving heating module 14 is difficult to be saved, the problem of power consumption increase.
Optionally, the phase change temperature of the phase change material 16 is T4, the first preset temperature is T2, and the second preset temperature is T3, where T2 is not less than T4 is not less than T3.
Illustratively, the first preset temperature T2 is 0 ℃, the second preset temperature T3 is 25 ℃, T4 is greater than or equal to 0 ℃ and less than or equal to 25 ℃, wherein the first preset temperature may be set as a lower limit value of the operating temperature of the battery 15, and the second preset temperature may be set as an upper limit value of the operating temperature of the battery 15, and the phase change temperature T4 of the phase change material 16 is set between the first preset temperature and the second preset temperature, which is beneficial to keeping the temperature of the battery 15 in the operating temperature interval.
As shown in fig. 4, the battery pack provided by the embodiment of the present invention further includes a battery connector 17, the battery connector 17 is used for connecting the battery 15 and the battery warming circuit, and the battery connector 17 is used for facilitating the connection between the battery 15 and the battery warming circuit.
The embodiment of the utility model provides a battery intensification circuit and battery pack are applicable to any type of battery, like lithium ion battery, the utility model discloses do not injecing this, the technical personnel in the field can carry out obvious change, adjustment and substitution to this and do not deviate from the utility model discloses a protection scope.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A battery warming circuit is characterized by comprising a temperature monitoring module, a logic judgment module, a switch module and a heating module;
the temperature monitoring module is used for monitoring the temperature of the battery;
the temperature monitoring module comprises a first voltage comparator and a second voltage comparator, wherein the first voltage comparator is used for comparing the current temperature of the battery with a first preset temperature, the second voltage comparator is used for comparing the current temperature of the battery with a second preset temperature, and the second preset temperature is greater than the first preset temperature;
the logic judgment module is respectively electrically connected with the temperature monitoring module and the switch module and is used for controlling the switch module to be switched on when the current temperature of the battery is less than or equal to a first preset temperature and controlling the switch module to be switched off when the current temperature of the battery is greater than a second preset temperature;
the heating module is electrically connected with the switch module and used for heating the battery when the switch module is started.
2. The battery warming circuit according to claim 1, wherein the temperature monitoring module further comprises a first resistor, a second resistor, a third resistor, a temperature sensing unit, a fourth resistor, and a fifth resistor;
a first end of the second resistor, a first end of the third resistor and a first end of the fifth resistor are electrically connected with a first power supply, a second end of the second resistor is electrically connected with the first end of the first resistor and an inverting input end of the first voltage comparator respectively, a second end of the third resistor is electrically connected with the first end of the temperature sensing unit, a non-inverting input end of the first voltage comparator and an inverting input end of the second voltage comparator respectively, and a second end of the fifth resistor is electrically connected with a first end of the fourth resistor and a non-inverting input end of the second voltage comparator respectively;
the second end of the first resistor, the second end of the temperature sensing unit and the second end of the fourth resistor are grounded;
the power supply input end of the first voltage comparator is electrically connected with a second power supply, the grounding end of the first voltage comparator is grounded, the power supply input end of the second voltage comparator is electrically connected with the second power supply, and the grounding end of the second voltage comparator is grounded;
the output end of the first voltage comparator and the output end of the second voltage comparator are both electrically connected with the logic judgment module.
3. The battery warming circuit according to claim 1, wherein the logic determining module includes an or logic gate unit;
the first input end of the OR logic gate unit is electrically connected with the output end of the first voltage comparator, the second input end of the OR logic gate unit is electrically connected with the output end of the second voltage comparator, and the output end of the OR logic gate unit is electrically connected with the switch module.
4. The battery warming circuit of claim 3, wherein the logic determining module further comprises: an AND logic gate unit and a trigger unit;
the first input end of the AND logic gate unit is electrically connected with the output end of the first voltage comparator, the second input end of the AND logic gate unit is electrically connected with the trigger unit, and the output end of the AND logic gate unit is electrically connected with the first input end of the OR logic gate unit.
5. The battery warming circuit of claim 4, wherein the logic determining module further comprises a power monitoring module, and the and logic gate unit further comprises a third input terminal;
and the third input end of the logic gate unit is electrically connected with the electric quantity monitoring module.
6. The battery warming circuit of claim 1, wherein the switching module comprises a power input terminal, a control terminal, and a power output terminal;
the power input end is used for being electrically connected with the battery, the control end is electrically connected with the logic judgment module, and the power output end is electrically connected with the heating module.
7. The battery warming circuit according to claim 1, wherein the heating module is a heat generating film.
8. The battery warming circuit according to claim 1, wherein the heating temperature of the heating module is T1, and the second preset temperature is T3, wherein T1 ≧ T3.
9. A battery pack comprising a battery and the battery warming circuit of any one of claims 1-8;
also included are phase change materials;
the phase change material is attached to the battery.
10. The battery pack of claim 9, wherein the phase change material has a phase change temperature of T4, the first preset temperature is T2, and the second preset temperature is T3, wherein T2 ≦ T4 ≦ T3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921382626.8U CN210224230U (en) | 2019-08-23 | 2019-08-23 | Battery temperature-raising circuit and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921382626.8U CN210224230U (en) | 2019-08-23 | 2019-08-23 | Battery temperature-raising circuit and battery pack |
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| CN210224230U true CN210224230U (en) | 2020-03-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380158A (en) * | 2019-08-23 | 2019-10-25 | 西安闻泰电子科技有限公司 | A kind of battery warm-up circuit and battery component |
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2019
- 2019-08-23 CN CN201921382626.8U patent/CN210224230U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380158A (en) * | 2019-08-23 | 2019-10-25 | 西安闻泰电子科技有限公司 | A kind of battery warm-up circuit and battery component |
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