CN218769703U - Lithium battery - Google Patents
Lithium battery Download PDFInfo
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- CN218769703U CN218769703U CN202223320490.2U CN202223320490U CN218769703U CN 218769703 U CN218769703 U CN 218769703U CN 202223320490 U CN202223320490 U CN 202223320490U CN 218769703 U CN218769703 U CN 218769703U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 75
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims description 67
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 208000015778 Undifferentiated pleomorphic sarcoma Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004402 ultra-violet photoelectron spectroscopy Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The application discloses lithium cell, this lithium cell includes group battery, charging relay, discharge diode, charging diode, DCDC converter and battery management system. The application provides a lithium cell is through being equipped with charging relay and discharge relay between the anodal interface of group battery positive pole and charge-discharge circuit, and is equipped with the diode that discharges that the forward set up and the diode that charges of reverse setting on charging relay and the discharge relay respectively, can realize that the group battery is incessant to supply power and with low costs to battery management system.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a lithium battery.
Background
An Uninterruptible Power Supply (UPS) is a Power Supply that supplies uninterruptible Power, and therefore, power Supply cannot be interrupted due to a short Power outage, and equipment with a high requirement on Power stability can be effectively protected. Most of traditional UPSs are equipped with lead-acid batteries, the specific energy is low, the size and the weight are large under the same electric quantity, generally, equipment such as an inverter capable of supplying power uninterruptedly needs to be equipped, and the UPS is not suitable for specific industries or special use scenes. Therefore, the lithium ion battery is more and more widely applied to various devices including automobiles, UPS, power storage and field power utilization, has the advantages of large capacity and small volume, and is the mainstream of the current battery market.
However, the existing uninterruptible power supply circuit for the lithium battery has a complex structure, and the switching time between the power supply of the external power supply and the power supply of the battery pack is long when sudden power failure occurs, so that the normal power supply to the load can be influenced by the switching time, that is, the uninterrupted power supply to the battery management system cannot be realized.
Therefore, how to provide a lithium battery to realize uninterrupted power supply of a battery pack to a battery management system is an urgent problem to be solved.
Disclosure of Invention
The application provides a lithium battery, and the lithium battery can realize that the group battery is incessant to the battery management system power supply.
In a first aspect, an embodiment of the present application provides a lithium battery, including: the battery pack comprises a battery pack, a charging relay, a discharging diode, a charging diode, a DCDC converter and a battery management system, wherein the anode of the battery pack is electrically connected with a common contact of the charging relay, the cathode of the battery pack is electrically connected with a cathode interface of a charging and discharging loop, and the end point of the anode of the battery pack, which is electrically connected with the common contact of the charging relay, is a first node; the common contact of the charging relay is electrically connected with the first node, the normally open contact of the charging relay is electrically connected with the common contact of the discharging relay, and the end point of the normally open contact of the charging relay, which is electrically connected with the common contact of the discharging relay, is a second node; a common contact of the discharge relay is electrically connected with the second node, and a normally open contact of the discharge relay is electrically connected with a positive electrode interface of the charge-discharge loop; the anode of the discharge diode is electrically connected with the first node, and the cathode of the discharge diode is electrically connected with the second node; the anode of the charging diode is electrically connected with the anode interface of the charging and discharging loop, and the cathode of the charging diode is electrically connected with the second node; the DCDC converter is electrically connected with the battery pack; the battery management system is electrically connected to the DCDC converter, the discharge relay, and the charge relay, respectively.
Optionally, in some embodiments of the present application, the lithium battery further includes a control switch, one end of the control switch is electrically connected to the input end of the DCDC converter, and the other end of the control switch is electrically connected to the negative electrode of the battery pack.
Optionally, in some embodiments of the present application, the lithium battery further includes a fuse, one end of the fuse is electrically connected to the positive electrode of the battery pack, and the other end of the fuse is electrically connected to the first node.
Optionally, in some embodiments of the present application, the lithium battery further includes a shunt electrically connected to the negative electrode of the battery pack, the battery management system, and the negative electrode interface of the charge and discharge circuit, respectively.
Optionally, in some embodiments of the present application, the lithium battery further includes a monitoring circuit, the positive terminal and the negative terminal of each battery cell in the battery pack are electrically connected to the monitoring circuit, and the monitoring circuit is electrically connected to the battery management system.
Optionally, in some embodiments of the present application, the battery management system includes a detector electrically connected to the battery pack for measuring an open circuit voltage of the battery pack and outputting an open circuit voltage value.
Optionally, in some embodiments of the present application, the detector includes a voltage sensing unit and an analog-to-digital conversion unit, the voltage sensing unit is electrically connected to the positive electrode of the battery pack and the negative electrode of the battery pack, respectively, and is configured to measure an open-circuit voltage of the battery pack and transmit the open-circuit voltage signal to the analog-to-digital conversion unit, and the analog-to-digital conversion unit is configured to convert the open-circuit voltage signal into an open-circuit voltage value.
Optionally, in some embodiments of the present application, the battery management system further includes a processor, the processor is electrically connected to the detector, and the processor is configured to output a preset residual electric quantity value corresponding to the certain voltage value range according to the open circuit voltage value and a plurality of preset voltage value ranges.
Optionally, in some embodiments of the present application, the battery management system further includes a controller configured to control the closing of the charging relay and the opening of the charging relay, and the closing of the discharging relay and the opening of the discharging relay according to the remaining electric quantity value.
Optionally, in some embodiments of the present application, the lithium battery further comprises a display, and the display is electrically connected to the battery management system.
The present application provides a lithium battery, which includes: the system comprises a battery pack, a charging relay, a discharging diode, a charging diode, a DCDC converter and a battery management system, wherein the anode of the battery pack is electrically connected with a first node, and the cathode of the battery pack is electrically connected with a cathode interface of a charging and discharging loop; a common contact of the charging relay is electrically connected with the first node, and a normally open contact of the charging relay is electrically connected with the second node; a common contact of the discharge relay is electrically connected with the second node, and a normally open contact of the discharge relay is electrically connected with a positive electrode interface of the charge-discharge loop; the anode of the discharge diode is electrically connected with the first node, and the cathode of the discharge diode is electrically connected with the second node; the anode of the charging diode is electrically connected with the anode interface of the charging and discharging loop, and the cathode of the charging diode is electrically connected with the second node; the DCDC converter is electrically connected with the battery pack; the battery management system is electrically connected to the DCDC converter, the discharge relay, and the charge relay, respectively. According to the lithium battery provided by the application, the charging relay and the discharging relay are arranged between the positive electrode of the battery pack and the positive electrode interface of the charging and discharging loop, and the charging relay and the discharging relay are respectively provided with the discharging diode arranged in the forward direction and the charging diode arranged in the reverse direction, so that the automatic charging of the battery pack can be realized; the DCDC converter can supply power to the battery management system uninterruptedly when the battery pack is charged and discharged, and the lithium battery has the advantages of simple process, small space requirement and low production cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a lithium battery provided in a first embodiment of the present application;
fig. 2 is a schematic structural diagram of a lithium battery provided in a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a lithium battery provided in a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a lithium battery provided in a fourth embodiment of the present application;
fig. 5 is a schematic structural diagram of a battery management system according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a lithium battery, and the lithium battery can realize automatic charging and uninterrupted external power supply of the lithium battery. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments. In addition, in the description of the present application, the term "including" means "including but not limited to". The terms "first", "second", "third", etc. are used merely as labels to distinguish between different objects, and not to describe a particular order.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a lithium battery provided in a first embodiment of the present application. As shown in fig. 1, the present application provides a lithium battery 100 comprising: the Battery pack comprises a Battery pack 10, a charging relay 20, a discharging relay 30, a discharging diode 40, a charging diode 50, a DCDC converter 60 and a Battery Management System 70 (Battery Management System, BMS for short), wherein the anode of the Battery pack 10 is electrically connected with a common contact of the charging relay 20, the cathode of the Battery pack 10 is electrically connected with a cathode interface VD of a charging and discharging loop, and the end point of the anode of the Battery pack 10 electrically connected with the common contact of the charging relay 20 is a first node N1; a common contact of the charging relay 20 is electrically connected with the first node N1, and a normally open contact of the charging relay 20 is electrically connected with a common contact of the discharging relay 30, wherein an end point of the normally open contact of the charging relay 20, which is electrically connected with the common contact of the discharging relay 30, is a second node N2; a common contact of the discharge relay 30 is electrically connected with the second node N2, and a normally open contact of the discharge relay 30 is electrically connected with a positive electrode interface VS of the charge-discharge loop; the anode of the discharge diode 40 is electrically connected to the first node N1, and the cathode of the discharge diode 40 is electrically connected to the second node N2; the anode of the charging diode 50 is electrically connected with the anode interface VS of the charging and discharging circuit, and the cathode of the charging diode 50 is electrically connected with the second node N2; the DCDC converter 60 is electrically connected to the battery pack 10; the battery management system 70 is electrically connected to the DCDC converter 60, the discharge relay 30, and the charge relay 20, respectively.
According to the lithium battery provided by the application, the charging relay 20 and the discharging relay 30 are arranged between the positive electrode of the battery pack 10 and the positive electrode interface VS of the charging and discharging loop, and the charging relay 20 and the discharging relay 30 are respectively provided with the discharging diode 40 arranged in the forward direction and the charging diode 50 arranged in the reverse direction, so that the automatic charging of the battery pack 10 can be realized; the DCDC converter 60 can supply power to the battery management system 70 continuously during charging and discharging of the battery pack 10, and the lithium battery has simple process, small space requirement and low production cost.
The negative electrode interface VD of the charge and discharge circuit is the negative electrode of the charge and discharge circuit; and the positive electrode interface VS of the charge-discharge loop is the positive electrode of the charge-discharge circuit.
In the embodiment of the present application, the lithium battery further includes a control switch 80, and the control switch 80 is electrically connected to the battery pack 10 and the DCDC converter 60, respectively. Specifically, the control switch 80 may be provided between the positive electrode of the battery pack 10 and the input terminal of the DCDC converter 60, and/or the control switch 80 may be provided between the negative electrode of the battery pack 10 and the input terminal of the DCDC converter 60. Further, a control switch 80 on may be provided between the DCDC converter 60 and the battery management system 70. The control switch 80 is used for controlling the on and off of the DCDC converter 60, and further controlling whether the battery management system 70 is activated, so that the fault rate of the battery management system 70 is reduced, and the reliability of the system operation is ensured.
In the embodiment of the present application, the battery pack 10 is formed by serially connecting a plurality of battery cells, and the battery pack 10 has charging and discharging functions. The battery pack 10 is connected in series to a charge/discharge circuit including a negative electrode interface VD of the charge/discharge circuit and a positive electrode interface VS of the charge/discharge circuit. The design does not need to separately arrange a charging loop and a discharging loop, thereby reducing the layout space of the circuit and reducing the process.
In the present embodiment, the DCDC converter 60 is provided between the battery pack 10 and the battery management system 70, and an input terminal of the DCDC converter 60 is electrically connected to the battery pack 10; the output of the DCDC converter 60 is electrically connected to the battery management system 70. The DCDC converter 60 is used to convert the voltage value of the battery pack 10 and supply power to the battery management system 70. Through setting up DCDC converter 60 and control switch 80 in this application, can realize incessant supplying power to battery management system 70 when group battery 10 discharges and charges, guaranteed battery management system 70's stable power supply, and then improved the reliability of lithium cell.
In the embodiment of the present application, the charging relay 20 and the discharging relay 30 are connected in series in the charging and discharging loop and electrically connected to the battery management system 70, the discharging diode 40 is connected in parallel to the charging relay 20, and the charging diode 50 is connected in parallel to the discharging relay 30. The charging relay 20 is configured to turn on a charging loop according to a charging start control signal transmitted by the battery management system 70, so as to charge the battery pack 10; the discharging relay 30 is configured to conduct a discharging loop according to a discharging start control signal transmitted by the battery management system 70, so as to supply power to the battery management system 70.
Specifically, the control switch 80 is closed such that the battery pack 10 is discharged to the DCDC converter 60, and the DCDC converter 60 converts the battery voltage of the battery pack 10 into the supply voltage of the battery management system 70, thereby supplying the battery management system 70 with power.
After the battery management system 70 is powered on and self-checked, the battery management system 70 controls the discharging relay 30 and the charging relay 20 to be closed, at this time, charging and discharging are possible, and when the battery pack 10 is charged to full voltage, the battery management system 70 controls the charging relay 20 to be opened, at this time, recharging is impossible, and the battery pack enters a full-power standby state.
When the external device needs emergency power supply or the external power supply loop is powered off, the discharging loop can be conducted through the discharging diode 40 and the discharging relay 30 to discharge outwards, the discharging current is monitored, the battery management system 70 controls the charging relay 20 to be closed, so that threshold voltage drift or device damage caused by long-time overcurrent of the discharging diode 40 is avoided, and meanwhile, uninterrupted power supply is achieved.
Further, when the battery management system 70 monitors that the battery pack 10 is discharged to the preset cut-off voltage, the discharge relay 30 is controlled to be turned off, and at this time, the battery pack 10 cannot be discharged any more. At this time, the battery management system 70 controls the charging diode 50 and the charging relay 20 to close, and turns on the charging loop to charge the battery pack 10. Further, the battery management system 70 monitors the charging current and controls the discharging relay 30 to close to prevent the charging diode 50 from overflowing for a long time, and after the battery pack 10 reaches the full-voltage, the battery management system 70 controls the charging relay 20 to open, and at this time, only the discharging relay 30 is in a closed state, and the battery pack 10 keeps in a power supply state. By means of the arrangement, the automatic charging and discharging process of the lithium battery can be achieved, the service life of the lithium battery is prolonged, and the stability of power supply is further guaranteed.
As a specific implementation manner of the present application, please refer to fig. 2, where fig. 2 is a schematic structural diagram of a lithium battery provided in a second embodiment of the present application. As shown in fig. 2, the present application provides a lithium battery 200, and the lithium battery 200 is different from the lithium battery 100 in that the lithium battery 200 further includes a fuse 81, one end of the fuse 81 is electrically connected to a positive electrode of the battery pack 10, and the other end of the fuse 81 is electrically connected to the first node N1.
The lithium battery 200 can avoid damage of devices in the charge and discharge circuit due to short circuit and overcurrent by arranging the fuse 81, and is favorable for improving the safety of the lithium battery. Other modules are the same as the lithium battery 100, and thus the description of the embodiment is omitted here.
As a specific implementation manner of the present application, please refer to fig. 3, where fig. 3 is a schematic structural diagram of a lithium battery provided in a third embodiment of the present application. As shown in fig. 3, the present application provides a lithium battery 300, and the lithium battery 300 is different from the lithium battery 200 in that the lithium battery 300 further includes a current divider 82, and the current divider 82 is electrically connected to the battery pack 10, the battery management system 70, and a negative electrode interface VD of the charge and discharge circuit, respectively. The shunt 82 is used to detect the total output current value of the battery pack 10 and transmit the detected total output current value to the battery management system 70.
The lithium battery 300 is provided with the shunt 82, so that the battery management system 70 can control the charging and discharging states of the battery pack 10 in real time, the service life of the lithium battery is prolonged, and the power supply stability of the battery pack 10 is ensured. Other modules are the same as the lithium battery 200, and thus the description of the embodiment is omitted here.
As a specific implementation manner of the present application, please refer to fig. 4, where fig. 4 is a schematic structural diagram of a lithium battery provided in a fourth embodiment of the present application; fig. 5 is a schematic structural diagram of a battery management system according to an embodiment of the present application. As shown in fig. 4, the present application provides a lithium battery 400, where the lithium battery 400 is different from the lithium battery 300 in that the lithium battery 400 further includes a monitoring circuit 83, a positive terminal and a negative terminal of each cell in the battery pack 10 are electrically connected to the monitoring circuit 83, and the monitoring circuit 83 is electrically connected to the battery management system 70. Fig. 4 only shows 3 cells by way of example, and those skilled in the art may adjust the number of the cells according to actual needs, which is not specifically limited herein. The monitoring circuit 83 is used to provide effective overcharge and overdischarge protection for the battery pack 10, and free series-parallel connection of the battery pack 10 can be achieved.
In the embodiment of the present application, the overcharge protection voltage and the overdischarge protection voltage of each cell in the battery pack 10 are set by the battery management system 70, and then the voltage of each cell in the battery pack 10 is measured in real time by the monitoring circuit 83.
Specifically, when the battery pack 10 is in a charging state, all the battery cells are charged simultaneously, and if the monitoring circuit 83 detects that the voltage of any one of the battery cells reaches the overcharge protection voltage, a feedback signal is immediately given to the battery management system 70, the battery management system 70 immediately controls the charging relay 20 to be disconnected, at this time, the charging circuit of the battery pack 10 is disconnected, and the battery pack 10 is not charged any more; the discharging circuit enables the battery pack 10 to keep a discharging function through the unidirectional conductivity of the discharging diode 40 and the cooperation with the discharging relay 30, and the battery pack 10 can be subjected to energy equalization through the charging relay 20 or energy equalization through the electric quantity output by the discharging circuit; when the monitoring circuit 83 detects that the voltage of the battery cell drops to the specified voltage, a feedback signal is immediately given to the battery management system 70, the battery management system 70 immediately controls the charging relay 20 to reset, at this time, the charging circuit of the battery pack 10 is turned on, and the battery pack 10 recovers the charging function.
The lithium battery 400 can provide effective overcharge and overdischarge protection for the battery pack 10 by providing the monitoring circuit 83, can realize free series-parallel connection of the battery pack 10, and can retain a discharge function in the overcharge protection and a charge function in the overdischarge protection.
Further, the lithium battery 400 may further include a display 84, the display 84 is electrically connected to the battery management system 70, and the display 84 may include a plurality of LED lamps corresponding to different electric quantity values. The voltage value, the total output current value and the like of the battery pack 10 are displayed and output through the display 84, the use and the working state of the lithium battery are conveniently known through monitoring and displaying the voltage, the current and the like of the lithium battery, the early warning and the processing of faults are facilitated, and the reliability and the safety of the lithium battery are further improved.
In the embodiment of the present application, as shown in fig. 5, the battery management system 70 includes a detector 71, a processor 72, and a controller 73. Wherein, the detector 71 is electrically connected with the battery pack 10, and the detector 71 is used for measuring the open circuit voltage of the battery pack 10 and outputting the open circuit voltage value.
Specifically, the detector 71 includes a voltage sensing unit (not shown in the drawings) electrically connected to the positive electrode of the battery pack 10 and the negative electrode of the battery pack 10, respectively, for measuring an open-circuit voltage of the battery pack 10 and transmitting an open-circuit voltage signal to the analog-to-digital conversion unit (not shown in the drawings) for converting the open-circuit voltage signal into an open-circuit voltage value. It should be noted that the detector 71 (including the voltage sensing unit and the analog-to-digital conversion unit), the processor 72 and the controller 73 may all adopt the existing device structure, and therefore, the detailed description of the present application is omitted.
Specifically, the processor 72 is electrically connected to the detector 71, and is configured to output a preset residual electric quantity value corresponding to the certain voltage value range according to the open circuit voltage value and the preset voltage value ranges, specifically, the processor 72 is configured to compare the open circuit voltage value with the preset voltage value ranges, and output the preset residual electric quantity value corresponding to the certain voltage value range when the open circuit voltage value is in the certain voltage value range of the voltage value ranges.
For example, in a single-cell lithium battery, the relationship between the open-circuit voltage and the remaining capacity is shown in table 1:
| open circuit voltage (v) | 4.2 | 4.06-3.97 | 3.98-3.87 | 3.92-3.79 | 3.87-3.73 | 3.82-3.68 |
| Residual capacity (%) | 100 | 90 | 80 | 70 | 60 | 50 |
| Open circuit voltage (v) | 3.79-3.65 | 3.77-3.62 | 3.74-3.58 | 3.68-3.51 | 3.45-3.42 | 3.0 |
| Residual capacity (%) | 40 | 30 | 20 | 10 | 5 | 0 |
TABLE 1
Specifically, the controller 73 is configured to control the closing of the charging relay 20 and the opening of the charging relay 20, and the closing of the discharging relay 30 and the opening of the discharging relay 30, according to the residual electric quantity value.
In the embodiment of the present application, the detector 71, the processor 72 and the controller 73 are disposed in the battery management system 70, so that the battery management system 70 can control the state of the battery pack 10 according to the charge information of the battery pack 10, for example, when the battery management system 70 detects that the remaining charge of the battery pack 10 is lower than 90%, the charging relay 20 is controlled to be turned on, and the battery pack 10 starts to be charged, so that the charge of the battery pack 10 is not lower than 90%.
Other modules are the same as the lithium battery 100, and thus the description of the embodiment is omitted here.
It should be noted that the above embodiments are merely illustrative, and various embodiments may be replaced and recombined according to actual needs, and the present application is not limited specifically herein.
The application provides a lithium battery includes: the charging system comprises a battery pack 10, a charging relay 20, a discharging relay 30, a discharging diode 40, a charging diode 50, a DCDC converter 60 and a battery management system 70, wherein the anode of the battery pack 10 is electrically connected with a first node N1, and the cathode of the battery pack 10 is electrically connected with a cathode interface VD of a charging and discharging loop; a common contact of the charging relay 20 is electrically connected with the first node N1, and a normally open contact of the charging relay 20 is electrically connected with the second node N2; a common contact of the discharge relay 30 is electrically connected with the second node N2, and a normally open contact of the discharge relay 30 is electrically connected with a positive electrode interface VS of the charge-discharge loop; the anode of the discharge diode 40 is electrically connected to the first node N1, and the cathode of the discharge diode 40 is electrically connected to the second node N2; the anode of the charging diode 50 is electrically connected with the anode interface VS of the charging and discharging circuit, and the cathode of the charging diode 50 is electrically connected with the second node N2; the DCDC converter 60 is electrically connected to the battery pack 10; the battery management system 70 is electrically connected to the DCDC converter 60, the discharge relay 30, and the charge relay 20, respectively.
The charging relay 20 and the discharging relay 30 are arranged between the positive electrode of the battery pack 10 and the positive electrode interface VS of the charging and discharging loop, and the discharging diode 40 arranged in the forward direction and the charging diode 50 arranged in the reverse direction are respectively arranged on the charging relay 20 and the discharging relay 30, so that the automatic charging of the battery pack 10 can be realized; the DCDC converter 60 can supply power to the battery management system 70 continuously during charging and discharging of the battery pack 10, and the lithium battery has simple process, small space requirement and low production cost.
The foregoing detailed description is directed to a lithium battery provided in an embodiment of the present application, and specific examples are applied herein to explain the principles and embodiments of the present application, where the description of the foregoing embodiments is only used to help understanding the method and its core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A lithium battery, comprising: a battery pack, a charging relay, a discharging diode, a charging diode, a DCDC converter and a battery management system,
the positive electrode of the battery pack is electrically connected with the common contact of the charging relay, the negative electrode of the battery pack is electrically connected with the negative electrode interface of the charging and discharging loop, and the end point of the positive electrode of the battery pack, which is electrically connected with the common contact of the charging relay, is a first node;
the common contact of the charging relay is electrically connected with the first node, the normally open contact of the charging relay is electrically connected with the common contact of the discharging relay, and the end point of the normally open contact of the charging relay, which is electrically connected with the common contact of the discharging relay, is a second node;
a common contact of the discharge relay is electrically connected with the second node, and a normally open contact of the discharge relay is electrically connected with a positive electrode interface of the charge-discharge loop;
the anode of the discharge diode is electrically connected with the first node, and the cathode of the discharge diode is electrically connected with the second node;
the anode of the charging diode is electrically connected with the anode interface of the charging and discharging loop, and the cathode of the charging diode is electrically connected with the second node;
the DCDC converter is electrically connected with the battery pack;
the battery management system is electrically connected to the DCDC converter, the discharge relay, and the charge relay, respectively.
2. The lithium battery of claim 1, further comprising a control switch, one end of the control switch being electrically connected to the input of the DCDC converter, the other end of the control switch being electrically connected to the negative electrode of the battery pack.
3. The lithium battery according to claim 1 or 2, further comprising a fuse, one end of the fuse being electrically connected to a positive electrode of the battery pack, and the other end of the fuse being electrically connected to the first node.
4. The lithium battery of claim 3, further comprising a current shunt electrically coupled to a negative electrode of the battery pack, the battery management system, and a negative electrode interface of the charge and discharge circuit, respectively.
5. The lithium battery of claim 1 or 2, further comprising a monitoring circuit, wherein the positive terminal and the negative terminal of each cell in the battery pack are electrically connected to the monitoring circuit, and the monitoring circuit is electrically connected to the battery management system.
6. The lithium battery of any one of claims 1 or 2, wherein the battery management system comprises a detector electrically connected to the battery pack for measuring an open circuit voltage of the battery pack and outputting an open circuit voltage value.
7. The lithium battery of claim 6, wherein the detector comprises a voltage sensing unit and an analog-to-digital conversion unit, the voltage sensing unit is electrically connected to the positive electrode of the battery pack and the negative electrode of the battery pack, respectively, and is configured to measure an open circuit voltage of the battery pack and transmit the open circuit voltage signal to the analog-to-digital conversion unit, and the analog-to-digital conversion unit is configured to convert the open circuit voltage signal into an open circuit voltage value.
8. The lithium battery of claim 6, wherein the battery management system further comprises a processor electrically coupled to the detector, the processor configured to output a predetermined remaining electric power value corresponding to the certain voltage value range based on the open circuit voltage value and a predetermined plurality of voltage value ranges.
9. The lithium battery of claim 8, wherein the battery management system further comprises a controller for controlling the closing or opening of the charging relay and the closing or opening of the discharging relay according to the remaining charge value.
10. The lithium battery of claim 1 or 2, further comprising a display, the display being electrically connected to the battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223320490.2U CN218769703U (en) | 2022-12-05 | 2022-12-05 | Lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223320490.2U CN218769703U (en) | 2022-12-05 | 2022-12-05 | Lithium battery |
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| Publication Number | Publication Date |
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| CN218769703U true CN218769703U (en) | 2023-03-28 |
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| CN202223320490.2U Active CN218769703U (en) | 2022-12-05 | 2022-12-05 | Lithium battery |
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| CN (1) | CN218769703U (en) |
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