CN100373739C - Battery temp compensation device - Google Patents
Battery temp compensation device Download PDFInfo
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- CN100373739C CN100373739C CNB2004100690978A CN200410069097A CN100373739C CN 100373739 C CN100373739 C CN 100373739C CN B2004100690978 A CNB2004100690978 A CN B2004100690978A CN 200410069097 A CN200410069097 A CN 200410069097A CN 100373739 C CN100373739 C CN 100373739C
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Abstract
The present invention discloses a battery temperature compensation device. A battery environment temperature signal is converted into a voltage signal by a temperature sampling and converting unit and a PWM signal generating unit, and a corresponding temperature compensation PWM signal is generated, and the PWM signal is sent to a given temperature compensation generating unit after isolated by a signal isolating unit. The given temperature compensation generating unit generates a given signal V2 after filtering the obtainer PWM signal and subtracting the internal voltage reference and the PWM signal according to the subtraction calculation of an operational amplifier. A monoboard given circuit unit generates a given signal V1 desired by a monoboard to solely debug a charger, and the given signal V1 is equal to the given signal V2 generated by the temperature compensation PWM signal in normal temperature. A temperature compensation superposed signal is output after the given signal V1 and the given signal V2 are superposed by a signal superposition unit according to the voltage superposition principle. The present invention has the advantages of simple control process and high compensation accuracy and is especially suitable for battery temperature compensating charge of a UPS charger.
Description
Technology neck city
The present invention relates to the charging device of storage battery, the temperature compensation means during particularly a kind of charge in batteries.
Background technology
Storage battery is the important component part in communication rectifier power supply and the uninterrupted power supply.The cost of storage battery is almost suitable with power supply main frame cost in the long delay uninterrupted power supply, and a lot of fault of uninterrupted power source is accumulator failure or causes because of the battery management improper use.Correct use, the good storage battery of maintenance and management, can prolong useful life of storage battery, and temperature-compensating is the emphasis in the battery management.So-called temperature-compensating, normally control the charging voltage of charger according to the height of battery context temperature, the high more then charging voltage of temperature is low more, and the low more then charging voltage of temperature is high more, general manufacturer's recommended is 3mV/ ℃ (a 2V monomer), and battery does not need compensation when room temperature environment.The battery temp compensation device that simple and reliable precision is high has very important meaning to life-span of storage battery.
In the prior art, about the more existing technical schemes of battery temp compensation device, a kind of charging device with temperature compensation function is disclosed as patent " battery charging plant with temperature compensation function " (publication number 2250576), regulate control unit in its output, be provided with a temperature-sensing element (device), and be connected, or by being connected with the voltage given potentiometer behind the amplifier with the voltage given potentiometer.Work as variations in temperature, given magnitude of voltage will change thereupon, thereby make the output voltage values of charging device can vary with temperature and adjust automatically.This patent has solved storage battery, and particularly maintenance free cell is in charging process, and charging voltage value should vary with temperature and the problem that changes.But the shortcoming of its existence is: because this patent is to survey the temperature of battery by thermistor, and the precision discreteness of thermistor is bigger, and thermistor is participated in the control of Voltage loop directly, so this device precision is lower, and the reliability of this device also can be subjected to the influence of thermistor.
Another patent " battery temp compensation device " (publication number 2458803) discloses the battery temp compensation device in a kind of communication field, utilize the foreground of existing electric power system to monitor the ambient temperature that detects battery, it is constant but the temperature variant PWM ripple of pulsewidth is given rectifier to send frequency, regulate the output voltage of rectifier with it, device comprises resistance, optocoupler, triode, electric capacity, voltage-stabiliser tube, amplifier and relay etc.But the shortcoming that patent exists is: needing outsidely provide the break-make of pwm signal control relay to determine whether allowing it pass through, and is equivalent to pwm signal is added a switch the many and control logic complexity of control circuit device.
Summary of the invention
Technical problem to be solved by this invention is that the battery temp compensation device compensation precision is high and control procedure is complicated in the prior art, proposes a kind of battery temp compensation device that can overcome these problems.
Core concept of the present invention is: by high-precision temperature sensor the battery context temperature signal that samples is converted to voltage signal, send corresponding temperature-compensating pwm signal according to this voltage signal, this pwm signal carries out capacitance-resistance filter after by the optocoupler electrical isolation, the output voltage that obtains after the filtering carries out the voltage stack with the given voltage of veneer after calculation process, the signal that draws comes the output voltage of regulating cell charger as final temperature compensation superimposed voltage signal.The output superimposed voltage signal of the compensation arrangement that the present invention proposes can be used as the given signal of charger in the machine system, relatively produces comparative voltage V in the back by the output voltage feedback signal with charger
S, voltage V
SThe control circuit of delivering to charger produces the corresponding driving signal and drives charger master power circuit power tube, is had the charging output voltage of temperature-compensating accordingly.
Technical scheme of the present invention is: a kind of battery temp compensation device, comprise veneer given circuit unit 101, Signal Spacing unit 102, the given generation unit 103 of temperature-compensating, given signal superpositing unit 104 and temperature sampling conversion and pwm signal generating unit 105; Described temperature sampling conversion and pwm signal generating unit 105 are converted to voltage signal with the battery context temperature signal that samples, and producing corresponding temperature-compensating pwm signal by the more little principle of the high more output duty cycle of voltage, the temperature-compensating pwm signal of generation is delivered to the given generation unit 103 of temperature-compensating after Signal Spacing unit 102 isolates; Pwm signal after the isolation that the given generation unit 103 of described temperature-compensating will obtain carries out deducting inner voltage reference signal according to operational amplifier subtraction rule after the filtering, thereby produces given signal V2; Described veneer given circuit unit 101 produces veneer and debugs the required given signal V1 of charger separately, and described given signal V1 equates according to the given signal V2 that temperature-compensating pwm signal under the normal temperature is produced with the given generation unit 103 of temperature-compensating; Output temperature compensation superposed signal Vg after described given signal V1 and described given signal V2 superpose by the voltage principle of stacking through given signal superpositing unit 104.
The principle that said temperature sample conversion and pwm signal generating unit 105 produce corresponding temperature-compensating pwm signal is: the high more output duty cycle of voltage is more little.
Said apparatus also comprises a switch between given signal superpositing unit 104 and the given generation unit 103 of temperature-compensating, when charger carries out debugging single board, disconnect this switch; When charger provides charging voltage to battery, closed this switch.In concrete the application, described switch is a jumper block, plays a part to disconnect and be connected.
The battery temp compensation device that the present invention proposes can be according to battery context variation of temperature output charging voltage compensating signal, detect the ambient temperature of battery by temperature sensors of high precision, and whole control process and transducer are isolated mutually, therefore it is low to overcome in the prior art degree of regulation, the problem of poor reliability; Simultaneously, the device that the present invention proposes only just can be realized high-precision function of temperature compensation control with optocoupler, amplifier and some capacitance-resistance simple combination, control procedure is simple and reliable, and, the compensation arrangement that uses the present invention to propose, can make charger when breaking away from machine system, carry out debugging single board separately, and when machine system moves, can simply temperature compensation signal be inserted by jumper block, and the charging voltage of charger output at normal temperatures is constant, is specially adapted to the battery temperature compensation charging in the uninterrupted power supply charger.
Description of drawings
Fig. 1 is that device that the present invention proposes is applied in the position view in the system;
Fig. 2 is the structure principle chart of the device that proposes of the present invention;
Fig. 3 is the circuit diagram of a specific embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is that device that the present invention proposes is applied in the position view in the system.Whole charging systems comprises temperature compensation means, control Driver Circuit, charger master power circuit and battery.Input signal is the battery context temperature, and Vg is the temperature-compensating superposed signal, and Vf is the charger output voltage feedback signal.Described battery context temperature input temp compensation arrangement produces temperature-compensating superposed signal V
g, described temperature-compensating superposed signal V
gWith described charger output voltage feedback signal V
fObtain described signal V relatively
S, described signal V
SProduce corresponding power tube drive signal by described control Driver Circuit, this drive signal is by driving the power tube of described charger master power circuit, and the charging voltage that obtains having temperature-compensating charges for described battery.Described temperature-compensating superposed signal Vg becomes big behind the charger steady operation, and then Shu Chu charging voltage increases, and on the contrary, described temperature-compensating superposed signal Vg diminishes, and then charging voltage reduces.
Fig. 2 is the structure principle chart of the device that proposes of the present invention.As shown in Figure 2, the battery temp compensation device that the present invention proposes comprises veneer given circuit unit 101, Signal Spacing unit 102, the given generation unit 103 of temperature-compensating, given signal superpositing unit 104 and temperature sampling conversion and pwm signal generating unit 105; Described temperature sampling conversion and pwm signal generating unit 105 are converted to voltage signal with the battery context temperature signal that samples, and producing corresponding temperature-compensating pwm signal, the temperature-compensating pwm signal of generation is delivered to the given generation unit 103 of temperature-compensating after Signal Spacing unit 102 isolates; Pwm signal after the isolation that the given generation unit 103 of described temperature-compensating will obtain carries out after the filtering voltage reference with inside and subtracts each other the back by the operational amplifier subtraction and produce given signal V2; Described veneer given circuit unit 101 produces veneers and debugs the required given signal V1 of charger separately, and the given signal V2 that the temperature-compensating pwm signal is produced under described given signal V1 and the normal temperature equates; Output temperature compensation superposed signal Vg after described given signal V1 and described given signal V2 superpose by the voltage principle of stacking through given signal superpositing unit 104.
In the compensation arrangement that the present invention proposes, input signal is the battery context temperature, and output signal is temperature-compensating superposed signal Vg.The battery context temperature is delivered to temperature sampling and signal conversion unit 105, by high-precision temperature sensor the temperature signal that samples is converted to voltage signal, temperature high voltage more is high more, sends corresponding temperature-compensating pwm signal according to voltage signal by the more little principle of the high more output duty cycle of voltage.The temperature-compensating pwm signal is delivered to the given generation unit 103 of temperature-compensating with the signal that produces after isolating through Signal Spacing unit 102, subtracts each other the back with internal voltage reference by the operational amplifier subtraction after the isolation pwm signal filtering that the given generation unit 103 of temperature-compensating will obtain and produces given signal V2.Pwm signal behind the isolation filter and internal voltage reference superposeed produces the given signal V2 of temperature-compensating, so just can make things convenient at normal temperatures and select needed temperature-compensating pwm signal duty ratio D
0Given signal V2 delivers to given signal superpositing unit 104, the given signal V1 that veneer given circuit unit 101 produces, given signal V1 is that veneer is debugged the required given signal of charger (given V2 disconnects with temperature-compensating) separately, given signal V1 also delivers to given signal superpositing unit 104 when complete machine needs temperature-compensating, the temperature-compensating superposed signal Vg that given signal V1 and given signal V2 produce after superposeing by the voltage principle of stacking by given signal superpositing unit 104 obtains the output voltage that final temperature compensation superimposed voltage signal comes the regulating cell charger.The temperature compensation means that the present invention proposes can make the charging voltage of charging device after veneer is debugged separately, and under the normal temperature machine system with the switch closure between given signal superpositing unit 104 and the given generation unit 103 of temperature-compensating after the charging voltage of output of charging device be consistent, according to the Thevenin's theorem in the circuit theory, this just requires, and duty ratio is D under given V1 that veneer given circuit unit produces and the normal temperature
0The time temperature-compensating pwm signal given V2 that produced must equate that promptly (duty ratio is default D to V1=V2 under the normal temperature
0The time).
Fig. 3 is the circuit diagram of a specific embodiment of the present invention.As shown in Figure 3, when charger carries out debugging single board, disconnect given signal superpositing unit 104 jumper block JP1, by the veneer output voltage of veneer given circuit unit 101 as charging device under the normal temperature of the given adjusting needs of charger, veneer given circuit unit 101 comprises resistance R 1, resistance R 2 and capacitor C 1, resistance R 1 one termination power Vcc, the other end of resistance R 1 connects resistance R 2 simultaneously, the resistance R 3 of given signal superpositing unit 104, capacitor C 1 and voltage node V1, the other end of resistance R 2 and capacitor C 1 and ground connection, the voltage ratio of resistance R 1 and R2 has determined the charging output voltage at normal temperatures of charging device veneer, wherein V1=Vcc * R2/ (R1+R2).Power taking resistance R1=15k in our charger of reality is used, resistance R 2=3k, capacitor C 1=0.1uF.
The temperature sampling of the battery temp compensation device that the present invention proposes and pwm signal generating unit 105 with the battery context temperature sampling after, convert voltage signal to by high-precision temperature sensor LM35DZ, system sends corresponding temperature-compensating pwm signal according to the voltage signal that obtains by the more little principle of the high more output duty cycle of voltage and delivers to Signal Spacing unit 102.In machine system, given voltage V2 of temperature-compensating and the given voltage V1 of veneer are stacked up by the voltage principle of stacking by given signal superpositing unit 104, control the output voltage of charger as the final temperature compensation superposed signal Vg of machine system charger, realization is to the temperature compensation function of battery, wherein
Described given signal superpositing unit 104 comprises resistance R 3, jumper block JP1 and resistance R 4, the end of the described jumper block JP1 of one termination of described resistance R 3, the input of the given voltage V1 of other end order plate, the end that power taking resistance R3 links to each other with jumper block JP1 is output voltage V g; The described resistance R 4 of another termination of described jumper block JP1.Signal Spacing unit 102 comprises resistance R 12 and the former limit of optocoupler D2 light-emitting diode.Described resistance R 12 1 termination temperature-compensating pwm signals, the other end also connects 1 pin and 2 pin of described optocoupler D2,3 pin of described optocoupler D2 and 4 pin and connect after connect control ground.Temperature-compensating produces circuit unit 103 and comprises optocoupler D2 secondary triode, amplifier D1B, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11 and capacitor C 2, one termination power Vcc of described resistance R 11,8 pin of the described optocoupler D2 of another termination, 6 pin of described optocoupler D2 and 7 pin and connect after connect an end of described resistance R 10, the described resistance R 9 of another termination of described resistance R 10 and described capacitor C 2 and voltage node V4,5 pin of the described amplifier D1B of another termination of described resistance R 9, the other end of described capacitor C 2 and connect 5 pin of described optocoupler D2 after ground connection, 6 pin of described amplifier D1B connect described resistance R 5 and described resistance R 6, the described resistance R 7 of another termination of described resistance R 6 and described resistance R 8 and voltage node V3, the other end ground connection of described resistance R 7, another termination power Vcc of described resistance R 8, the other end of 7 pin of the described amplifier D1B of another termination of described resistance R 5 and described given superposed signal unit 104 resistance R 4.
Under the constant situation of PWM change in duty cycle scope, the value of resistance R 3 and R4 has determined the excursion of the output voltage of the charger of regulating, the temperature-compensated voltage scope of battery just, the charging voltage of battery changed several volts when promptly resistance R 3, R4 had determined 1 ℃ of the every variation of battery context temperature.The ambient temperature of battery is mid point with normal temperature in the temperature replenishment control circuit, and general normal temperature is got 25 ℃, and this moment, the duty ratio of the temperature-compensating pwm signal that system sends was D
0(common D
0Get 50%), pwm signal obtains node voltage V4, wherein V4=Vo * D through RC filtering after by light-coupled isolation again
0, Vo is the amplitude of PWM voltage signal, D
0Be the duty ratio of pwm signal under the normal temperature, the change in duty cycle scope that system sends is at D
0Fluctuation (common desirable 35%-65%) up and down, the voltage V4 that obtains after the filtering receives the end in the same way of amplifier D1B, the level V3 that reverse termination one is fixed, V3=Vcc * R7/ (R7+R8) wherein, give determining voltage signal V2, wherein V2=(R5/R6+1) V4-(R5/R6) V3 by the temperature-compensating that amplifier D1B output needs.Because the output voltage of 25 ℃ of following chargers of normal temperature does not need compensation, require in the PWM duty ratio this moment is D
0The time V1=V2, thereby the output voltage of realizing charger debugging single board under the normal temperature just can obtain the charging voltage that need mix up as long as jumper block JP1 connected in machine system.The effect of optocoupler is to make between complete machine control system and the charger electrical isolation to be arranged, and the one side of amplifier D1B plays the effect of amplification, simultaneously can carry out impedance matching, the choosing of favourable parameter.When the ambient temperature that detects battery when machine system changes, will control the duty ratio D of temperature-compensating pwm signal at D according to variation of temperature
0Change up and down.When the battery context temperature was higher than 25 ℃, the duty ratio D of the pwm signal that system produces was less than D
0, making V4 diminish, thereby make V2 diminish, final Vg diminishes, and under the control circuit regulating action of charger, the output voltage of charger descends like this, thereby reaches the temperature-compensating requirement that charging voltage descends when high of battery context temperature.Otherwise when the battery context temperature was lower than 25 ℃, the duty ratio D of the pwm signal that system produces was greater than D
0, making V4 become big, thereby make V2 become big, final Vg becomes big, and under the control circuit of charger was regulated, the output voltage of charger rose like this, thereby reached the temperature-compensating requirement of battery context temperature charging voltage rising when low.In a most preferred embodiment of the present invention: the floating charge voltage of 20 joint 12V battery chargers is 274V under the normal temperature, gets D
0=50%, when the battery context temperature is elevated to 30 ℃ by 25 ℃ of normal temperature, system is according to the variation of detected ambient temperature, the duty ratio of temperature-compensating pwm signal will drop to 48% by 50%, the filtered node voltage V4 of RC this moment will reduce, the given signal V2 of temperature-compensating is corresponding also to be reduced, Shu Chu temperature-compensating superposed signal Vg also descends like this, this moment, the decline of Vg made the output charging voltage of the charger 1.8V that descended, promptly our float charge voltage of charger drops to 272.2V 30 ℃ the time, reaches the purpose of battery temperature compensation.Power taking hinders R3=10k in actual applications, resistance R 4=1M, resistance R 5=10k, resistance R 6=10k, R7=10k, resistance R 8=20k, resistance R 9=10k, R10=10k, resistance R 11=10k, resistance R 12=1k, capacitor C 2=1uF, the effect of resistance R 10 is the electric currents that limit the optocoupler light-emitting diode of flowing through.
The temperature compensation means that the present invention proposes, by 1 jumper block, 1 optocoupler, the combination of an amplifier, 2 electric capacity and some resistance just can realize, not only make the charger veneer to debug separately, also realized just can carrying out behind the simple wire jumper of charger in the machine system compensation of battery context temperature charging voltage.The device control circuit that the present invention proposes is simple, and temperature compensation function is complete, is specially adapted in the UPS charger.
Claims (2)
1. a battery temp compensation device comprises veneer given circuit unit (101), Signal Spacing unit (102), the given generation unit of temperature-compensating (103), given signal superpositing unit (104) and temperature sampling conversion and pwm signal generating unit (105); Described temperature sampling conversion and pwm signal generating unit (105) are converted to voltage signal with the battery context temperature signal that samples, and producing corresponding temperature-compensating pwm signal by the more little principle of the high more output duty cycle of voltage, the temperature-compensating pwm signal of generation is delivered to the given generation unit of temperature-compensating (103) after Signal Spacing unit (102) isolate; Pwm signal after the isolation that the given generation unit of described temperature-compensating (103) will obtain carries out deducting inner voltage reference signal according to operational amplifier subtraction rule after the filtering, thereby produces given signal V2; Described veneer given circuit unit (101) produces veneer and debugs the required given signal V1 of charger separately, and described given signal V1 equates according to the given signal V2 that temperature-compensating pwm signal under the normal temperature is produced with the given generation unit of temperature-compensating (103); Output temperature compensation superposed signal Vg after described given signal V1 and described given signal V2 superpose by the voltage principle of stacking through given signal superpositing unit (104).
2. a kind of battery temp compensation device according to claim 1, it is characterized in that: described device also comprises a switch between given signal superpositing unit (104) and the given generation unit of temperature-compensating (103), when charger carries out debugging single board, disconnect this switch; When charger provides charging voltage to battery, closed this switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100690978A CN100373739C (en) | 2004-07-20 | 2004-07-20 | Battery temp compensation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100690978A CN100373739C (en) | 2004-07-20 | 2004-07-20 | Battery temp compensation device |
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| CN1725595A CN1725595A (en) | 2006-01-25 |
| CN100373739C true CN100373739C (en) | 2008-03-05 |
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| CNB2004100690978A Expired - Fee Related CN100373739C (en) | 2004-07-20 | 2004-07-20 | Battery temp compensation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570553A (en) * | 2012-01-20 | 2012-07-11 | 张家港市华为电子有限公司 | Temperature compensation method in process of charging storage battery |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5519138B2 (en) * | 2008-10-07 | 2014-06-11 | 株式会社マキタ | Charger |
| CN109274153B (en) * | 2018-11-12 | 2022-08-05 | 天津航空机电有限公司 | Temperature compensation circuit for charging energy storage module and charger |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4370606A (en) * | 1979-10-13 | 1983-01-25 | Matsushita Electric Works, Ltd. | Charging apparatus |
| CN2250576Y (en) * | 1995-09-27 | 1997-03-26 | 四川电力试验研究院 | Accumulator charger with temperature compensating function |
-
2004
- 2004-07-20 CN CNB2004100690978A patent/CN100373739C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4370606A (en) * | 1979-10-13 | 1983-01-25 | Matsushita Electric Works, Ltd. | Charging apparatus |
| CN2250576Y (en) * | 1995-09-27 | 1997-03-26 | 四川电力试验研究院 | Accumulator charger with temperature compensating function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570553A (en) * | 2012-01-20 | 2012-07-11 | 张家港市华为电子有限公司 | Temperature compensation method in process of charging storage battery |
| CN102570553B (en) * | 2012-01-20 | 2014-04-30 | 张家港市华为电子有限公司 | Temperature compensation method in process of charging storage battery |
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| Publication number | Publication date |
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| CN1725595A (en) | 2006-01-25 |
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Effective date of registration: 20180426 Address after: California, USA Patentee after: Global innovation polymerization LLC Address before: 518057, Nanshan District high tech Industrial Park, Guangdong province Shenzhen science and technology south road Zhongxing building A block 6 Patentee before: ZTE Corp. |
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