CN205160118U - Equalization circuit for battery pack - Google Patents
Equalization circuit for battery pack Download PDFInfo
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- CN205160118U CN205160118U CN201520868052.0U CN201520868052U CN205160118U CN 205160118 U CN205160118 U CN 205160118U CN 201520868052 U CN201520868052 U CN 201520868052U CN 205160118 U CN205160118 U CN 205160118U
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Abstract
本实用新型公开了一种电池组均衡电路，包括由多个电池单体串联组成的电池组，其特征在于，还包括正极并联母线、负极并联母线、多个电池单体串联通断开关和多个电池单体并联通断开关；所述电池单体串联通断开关设置于串联的相邻的两个所述电池单体之间，所述电池单体并联通断开关设置于每个所述电池单体的正极与所述正极并联母线、每个所述电池单体的负极与所述负极并联母线之间。本实用新型提供的电池组均衡电路，可以简单快速地将电池组内电压差异较大的电池单体进行能量转移，实现电池组的快速无损均衡。
The utility model discloses a battery pack balancing circuit, which comprises a battery pack composed of a plurality of battery cells connected in series, and is characterized in that it also includes a positive pole parallel busbar, a negative pole parallel busbar, a plurality of battery monomer series on-off switches and multiple A battery cell parallel on-off switch; the battery cell series on-off switch is arranged between two adjacent battery cells in series, and the battery cell parallel on-off switch is arranged on each of the battery cells Between the positive pole of the battery cell and the positive parallel bus, and between the negative pole of each battery cell and the negative parallel bus. The battery pack equalization circuit provided by the utility model can simply and quickly transfer energy from the battery cells with large voltage differences in the battery pack to realize rapid and non-destructive equalization of the battery pack.
Description
技术领域technical field
本实用新型涉及电池均衡技术领域，尤其涉及一种电池组均衡电路。The utility model relates to the technical field of battery balancing, in particular to a battery pack balancing circuit.
背景技术Background technique
随着当前环境保护和能源节约成为主流，人们开始越来越广泛的把电池组运用于各种动力系统中，比如电动汽车的动力源、通信设备的应急供电装置和能量转移存储装置等等。不过，高功率大容量的电池由于技术上的限制，还不能大批量的生产，最常应用的还是技术成熟的低功率小容量的单体电池。而单个电池提供的能源是有限的，要满足各种动力系统的电能需求势必要将众多的单体电池采用串联和(或)并联的方式连接成组，然后将这些电池模组再进行串联和(或)并联连接，达到一定的电压等级及容量等级来满足人们的需求。With the current environmental protection and energy conservation becoming the mainstream, people began to use battery packs in various power systems more and more widely, such as the power source of electric vehicles, emergency power supply devices for communication equipment, energy transfer storage devices, and so on. However, due to technical limitations, high-power and large-capacity batteries cannot be mass-produced, and the most commonly used single batteries with mature technology and low power and small capacity. However, the energy provided by a single battery is limited. To meet the power requirements of various power systems, it is necessary to connect a large number of single batteries in series and/or in parallel, and then connect these battery modules in series and (or) connected in parallel to reach a certain voltage level and capacity level to meet people's needs.
这样大规模的串并联电池，很难保证电池组内电池单体的一致性。另外，电池组在不断充放电循环的使用过程中，由于老化的程度不同，也会造成各个单体电池的差异越来越明显。电池组内电池单体的不一致性会降低电池组的使用性能，缩短电池组的使用寿命，严重的还可能会使某些电池单体过充电或者过放电，严重损坏电池，甚至有电池爆炸的危险。Such large-scale series-parallel batteries are difficult to ensure the consistency of the battery cells in the battery pack. In addition, during the use of the battery pack in continuous charge and discharge cycles, due to the different degrees of aging, the differences between individual cells will become more and more obvious. The inconsistency of the battery cells in the battery pack will reduce the performance of the battery pack and shorten the service life of the battery pack. In severe cases, some battery cells may be overcharged or over-discharged, which will seriously damage the battery and even cause the battery to explode. Danger.
实用新型内容Utility model content
本实用新型的目的是提供一种电池组均衡电路，可以简单快速地将电池组内电压差异较大的电池单体进行能量转移，实现电池组的快速无损均衡。The purpose of the utility model is to provide a battery pack equalization circuit, which can simply and quickly transfer the energy of the battery cells with large voltage differences in the battery pack, so as to realize the fast and non-destructive equalization of the battery pack.
本实用新型方案如下：The utility model scheme is as follows:
一种电池组均衡电路，包括由多个电池单体串联组成的电池组，还包括电池管理系统、正极并联母线、负极并联母线、多个电池单体串联通断开关和多个电池单体并联通断开关；所述电池串联通断开关设置于串联的相邻的两个所述电池单体之间，所述电池单体并联通断开关设置于每个所述电池单体的正极与所述正极并联母线、每个所述电池单体的负极与所述负极并联母线之间。所述电池单体串联通断开关可以在需要电池组工作时连通电池组的串联线路，在电池组内电池单体电压不均衡并且需要均衡时，断开所述电池单体与电池组的串联线路的连接。所述电池单体并联通断开关可以在需要所述电池组工作时断开所述电池单体的正极与所述正极并联母线、所述电池单体的负极与所述负极并联母线之间的连接，从而断开所述电池单体之间的并联连接，而在所述电池组内所述电池单体电压不均衡并且需要均衡时，将需要均衡的所述电池单体进行并联连接。A battery pack balancing circuit, including a battery pack composed of multiple battery cells in series, and also includes a battery management system, a positive parallel bus, a negative parallel bus, multiple battery single series on-off switches, and multiple battery single parallel Unicom on-off switch; the battery series on-off switch is set between two adjacent battery cells in series, and the battery cell parallel on-off switch is set on the positive pole of each battery cell and the battery cell between the positive parallel busbar, the negative pole of each battery cell, and the negative parallel busbar. The battery cell series on-off switch can connect the series circuit of the battery pack when the battery pack is required to work, and disconnect the series connection between the battery cell and the battery pack when the voltage of the battery cells in the battery pack is unbalanced and needs to be balanced. Connection of lines. The battery cell parallel on-off switch can disconnect the positive pole of the battery cell and the positive parallel bus bar, the negative pole of the battery cell and the negative parallel bus bar when the battery pack is required to work. connection, so as to disconnect the parallel connection between the battery cells, and when the voltage of the battery cells in the battery pack is unbalanced and needs to be balanced, the battery cells that need to be balanced are connected in parallel.
进一步地，所述电池单体串联通断开关为电池单体串联继电器，所述电池管理系统通过控制所述电池单体串联继电器来完成每个所述电池单体串联电路的通断。Further, the battery cell series on-off switch is a battery cell series relay, and the battery management system completes the on-off of each of the battery cell series circuits by controlling the battery cell series relay.
进一步地，所述电池单体并联通断开关为电池单体并联继电器，所述电池管理系统通过控制所述电池单体并联继电器来完成每个所述电池单体的正极与所述正极并联母线、每个所述电池单体的负极与所述负极并联母线的通断。Further, the battery cell parallel on-off switch is a battery cell parallel relay, and the battery management system controls the battery cell parallel relay to complete the connection between the positive pole of each battery cell and the positive pole parallel bus bar. , the connection and disconnection between the negative pole of each battery cell and the negative pole parallel busbar.
进一步地，多个所述电池单体串联通断开关集成为一个串联通断总闸，同时控制所有所述电池单体串联电路的通断。Further, a plurality of the series on-off switches of the battery cells are integrated into a series on-off main gate, which controls the on-off of all the series circuits of the battery cells at the same time.
进一步地，多个所述电池单体并联通断开关集成为一个并联通断总闸，同时控制所有所述电池单体的正极与所述正极并联母线、所有所述电池单体的负极与所述负极并联母线之间的通断。Further, a plurality of parallel on-off switches of the battery cells are integrated into a parallel on-off main gate, which simultaneously controls the positive poles of all the battery cells and the positive parallel busbar, and the negative poles of all the battery cells and all The on-off between the negative parallel buses.
本实用新型提供的电池组均衡电路可以把电池组内电压差异较大的电池单体从电池组串联线路中隔离出来，并将这些电池单体进行并联连接，实现差异电池单体之间的能量无损转移，达到整个电池组内电池单体电压均衡的目的。The battery pack equalization circuit provided by the utility model can isolate the battery cells with large voltage differences in the battery pack from the series circuit of the battery pack, and connect these battery cells in parallel to realize the energy difference between the different battery cells. Lossless transfer to achieve the purpose of voltage balance of battery cells in the entire battery pack.
附图说明Description of drawings
图1为实施例1的电池组的均衡电路的电路图；Fig. 1 is the circuit diagram of the balancing circuit of the battery pack of embodiment 1;
图2为实施例2的电池组的均衡电路的电路图；Fig. 2 is the circuit diagram of the balancing circuit of the battery pack of embodiment 2;
图3为实施例3的电池组的均衡电路的电路图；Fig. 3 is the circuit diagram of the balancing circuit of the battery pack of embodiment 3;
其中，附图标记说明如下：Wherein, the reference signs are explained as follows:
10电池组101电池单体20串联通断总闸10 battery packs 101 battery cells 20 series on-off master switch
21电池单体串联通断开关22电池单体串联继电器30并联通断总闸21 Battery cell series on-off switch 22 Battery cell series relay 30 Parallel on-off main switch
31电池单体并联通断开关32电池单体并联继电器41正极并联母线31 battery cell parallel on-off switch 32 battery cell parallel relay 41 positive parallel bus
42负极并联母线50电池管理系统51电池单体电压检测模块42 Negative parallel busbar 50 Battery management system 51 Battery cell voltage detection module
52串联继电器控制模块53并联继电器控制模块52 series relay control module 53 parallel relay control module
具体实施方式detailed description
实施例1Example 1
如图1所示，给出了一个电池组均衡电路的实施例。As shown in FIG. 1 , an embodiment of a battery pack balancing circuit is given.
本例中，电池组均衡电路包括正极并联母线41、负极并联母线42、多个电池单体串联通断开关21和多个电池单体并联通断开关31。电池单体串联通断开关21设置于串联的相邻的两个电池单体101之间，电池单体并联通断开关31设置于每个电池单体101的正极与正极并联母线41、每个电池单体101的负极与负极并联母线42之间。电池单体串联通断开关21可以在需要电池组10工作时连通电池组10的串接线路，而在电池组10内电池单体101的电压不均衡并且需要均衡时，断开电池单体101与电池组10的串接线路的连接。电池单体并联通断开关31可以在需要电池组10工作时断开电池单体101的正极与正极并联母线41、电池单体101的负极与负极并联母线42之间的连接，从而断开电池单体101之间的并联连接，而在电池组10内电池单体101电压不均衡并且需要均衡时，将需要均衡的电池单体101进行并联连接。In this example, the battery pack balancing circuit includes a positive parallel bus 41 , a negative parallel bus 42 , multiple battery cell series on-off switches 21 and multiple battery cell parallel on-off switches 31 . The battery cell series on-off switch 21 is arranged between two adjacent battery cells 101 connected in series, and the battery cell parallel on-off switch 31 is arranged on the positive pole of each battery cell 101 and the positive pole parallel bus 41 , each The negative pole of the battery cell 101 is connected between the negative pole parallel bus bar 42 . The battery cell series on-off switch 21 can connect the series connection line of the battery pack 10 when the battery pack 10 needs to work, and disconnect the battery cell 101 when the voltage of the battery cells 101 in the battery pack 10 is unbalanced and needs to be balanced. Connection to the series line of the battery pack 10 . The battery cell parallel on-off switch 31 can disconnect the positive pole of the battery cell 101 and the positive parallel bus 41, the negative pole of the battery cell 101 and the negative parallel bus 42 when the battery pack 10 needs to work, thereby disconnecting the battery. The battery cells 101 are connected in parallel, and when the voltage of the battery cells 101 in the battery pack 10 is unbalanced and needs to be balanced, the battery cells 101 that need to be balanced are connected in parallel.
本例提供的电池组均衡电路可以把电池组内电压差异较大的电池单体从电池组串联线路中隔离出来，并将这些电池单体进行并联连接，实现差异电池单体之间的能量无损转移，达到整个电池组内电池单体电压均衡的目的。The battery pack equalization circuit provided in this example can isolate the battery cells with large voltage differences in the battery pack from the series circuit of the battery pack, and connect these battery cells in parallel to realize energy loss between different battery cells Transfer to achieve the purpose of voltage balance of battery cells in the entire battery pack.
实施例2Example 2
如图2所示，给出了另一个电池组均衡电路的实施例。As shown in FIG. 2 , another embodiment of a battery pack balancing circuit is given.
本例与实施例1的区别为，所有电池单体串联通断开关集成为一个串联通断总闸20，所有电池单体并联通断开关集成为一个并联通断总闸30。串联通断总闸20可以在需要电池组10工作时连通电池组10的串联线路，在电池组10内电池单体101的电压不均衡并且需要均衡时，断开电池单体101与电池组10串接线路的连接。并联通断总闸30可以在需要电池组10工作时断开电池单体101的并联连接，在电池组10内电池单体101的电压不均衡且需要均衡时，将电池组10内所有电池单体101进行并联连接。The difference between this example and Embodiment 1 is that all battery cell series on-off switches are integrated into a series on-off master gate 20 , and all battery cell parallel on-off switches are integrated into a parallel on-off master gate 30 . The series switch 20 can connect the series circuit of the battery pack 10 when the battery pack 10 needs to work, and disconnect the battery cells 101 and the battery pack 10 when the voltage of the battery cells 101 in the battery pack 10 is unbalanced and needs to be balanced. Serial connection. The parallel on-off master switch 30 can disconnect the parallel connection of the battery cells 101 when the battery pack 10 is required to work, and when the voltage of the battery cells 101 in the battery pack 10 is unbalanced and needs to be balanced, all the battery cells in the battery pack 10 will be disconnected. The bodies 101 are connected in parallel.
本例提供的电池组均衡方法可以简单快速地将电池组内各个电池单体进行并联连接，实现差异电池单体之间的能量无损转移，达到整个电池组内电池单体电压均衡的目的。The battery pack equalization method provided in this example can simply and quickly connect the battery cells in the battery pack in parallel to realize the lossless transfer of energy between different battery cells and achieve the purpose of voltage balance of the battery cells in the entire battery pack.
实施例3Example 3
如图3所示，给出了另一个电池组均衡电路的实施例。As shown in FIG. 3 , another embodiment of a battery pack balancing circuit is given.
本例与实施例1的区别为，电池单体串联通断开关设置为电池单体串联继电器22，电池单体并联通断开关设置为电池单体并联继电器32，并由电池管理系统50进行控制。电池管理系统50包括电池单体电压检测模块51、串联继电器控制模块52和并联继电器控制模块53。电池单体电压检测模块51检测电池组10内各个电池单体101的端电压，由电池管理系统50根据预制参数判定电池组10内各个电池单体101是否均衡，以及哪些电池单体101需要均衡。如果判定电池组10的某些电池单体101需要均衡，则由串联继电器控制模块52来控制电池单体串联继电器22将需要均衡的电池单体101从电池组10的串联线路隔离出来。然后，将需要均衡的电池单体101的正极与正极并联母线41、需要均衡的电池单体101的负极与负极并联母线42连接，从而将需要均衡的电池单体101并联在一起，实现这些电池单体101的能量无损转移。The difference between this example and Embodiment 1 is that the series on-off switch of the battery cells is set as the battery cell series relay 22, and the battery cell parallel on-off switch is set as the battery cell parallel relay 32, and is controlled by the battery management system 50 . The battery management system 50 includes a battery cell voltage detection module 51 , a series relay control module 52 and a parallel relay control module 53 . The battery cell voltage detection module 51 detects the terminal voltage of each battery cell 101 in the battery pack 10, and the battery management system 50 determines whether each battery cell 101 in the battery pack 10 is balanced according to prefabricated parameters, and which battery cells 101 need to be balanced . If it is determined that some battery cells 101 of the battery pack 10 need to be balanced, the series relay control module 52 controls the battery cell series relay 22 to isolate the battery cells 101 that need to be balanced from the series circuit of the battery pack 10 . Then, connect the positive poles of the battery cells 101 that need to be balanced to the positive parallel bus bar 41, and the negative poles of the battery cells 101 that need to be balanced to the negative parallel bus bar 42, so that the battery cells 101 that need to be balanced are connected in parallel to realize these battery The energy of the monomer 101 is transferred losslessly.
本例提供的电池组均衡电路可以把电池组内电压差异较大的电池单体从电池组串联线路中隔离出来，并将这些电池单体进行并联连接，实现差异电池单体之间的能量无损转移，达到整个电池组内电池单体电压均衡的目的。The battery pack equalization circuit provided in this example can isolate the battery cells with large voltage differences in the battery pack from the series circuit of the battery pack, and connect these battery cells in parallel to realize energy loss between different battery cells Transfer to achieve the purpose of voltage balance of battery cells in the entire battery pack.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106058986A (en) * | 2016-07-04 | 2016-10-26 | 武汉理工大学 | Automotive battery equalization circuit based on lithium iron phosphate |
| CN106602664A (en) * | 2017-01-05 | 2017-04-26 | 清华大学深圳研究生院 | Battery pack with dynamically-adjustable connection topology and implementation method thereof |
| CN106655307A (en) * | 2015-11-03 | 2017-05-10 | 北京普莱德新能源电池科技有限公司 | Battery pack equalization circuit |
| CN107171387A (en) * | 2017-06-07 | 2017-09-15 | 国网山东省电力公司 | It is a kind of can dynamic restructuring battery energy storage system and method |
| CN107856557A (en) * | 2017-10-17 | 2018-03-30 | 北京普莱德新能源电池科技有限公司 | A kind of electrokinetic cell system and electric car with equalization function |
| CN107863469A (en) * | 2017-10-17 | 2018-03-30 | 北京普莱德新能源电池科技有限公司 | A kind of electrokinetic cell equilibrium converting system and battery bag |
| CN109755948A (en) * | 2017-11-07 | 2019-05-14 | 银隆新能源股份有限公司 | Voltage equalization circuit for battery module of energy storage system and voltage equalization method thereof |
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- 2015-11-03 CN CN201520868052.0U patent/CN205160118U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655307A (en) * | 2015-11-03 | 2017-05-10 | 北京普莱德新能源电池科技有限公司 | Battery pack equalization circuit |
| CN106058986A (en) * | 2016-07-04 | 2016-10-26 | 武汉理工大学 | Automotive battery equalization circuit based on lithium iron phosphate |
| CN106602664A (en) * | 2017-01-05 | 2017-04-26 | 清华大学深圳研究生院 | Battery pack with dynamically-adjustable connection topology and implementation method thereof |
| CN106602664B (en) * | 2017-01-05 | 2024-03-22 | 清华大学深圳研究生院 | Battery pack with dynamically adjustable connection topology and implementation method thereof |
| CN107171387A (en) * | 2017-06-07 | 2017-09-15 | 国网山东省电力公司 | It is a kind of can dynamic restructuring battery energy storage system and method |
| CN107856557A (en) * | 2017-10-17 | 2018-03-30 | 北京普莱德新能源电池科技有限公司 | A kind of electrokinetic cell system and electric car with equalization function |
| CN107863469A (en) * | 2017-10-17 | 2018-03-30 | 北京普莱德新能源电池科技有限公司 | A kind of electrokinetic cell equilibrium converting system and battery bag |
| CN107856557B (en) * | 2017-10-17 | 2020-04-14 | 北京普莱德新能源电池科技有限公司 | A power battery system with equalization function and electric vehicle |
| CN109755948A (en) * | 2017-11-07 | 2019-05-14 | 银隆新能源股份有限公司 | Voltage equalization circuit for battery module of energy storage system and voltage equalization method thereof |
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