BMS battery equalization system for new energy battery

Abstract

The utility model discloses a BMS battery equalization system for a new energy battery, and belongs to the technical field of new energy batteries. A BMS battery equalization system for a new energy battery comprises a battery pack and further comprises a first binding post and a second binding post which are both fixedly connected to the battery pack; the battery pack comprises a battery cell body and a switch; the battery cell body is connected with the switch; the top cover is fixedly connected to the battery cell body; according to the utility model, energy waste in a current mainstream BMS equalization function can be effectively avoided; meanwhile, when a part of battery cells in the battery pack are damaged, a complete loop which can be continuously used can be generated while the system controls to disconnect the damaged battery cells, and the battery pack does not need to be disassembled; after the battery cells are detected one by one and damaged battery cells are replaced by good battery cells, waste batteries can be recycled and subjected to echelon utilization and battery maintenance, the damaged battery cells which can bring risks are eliminated in advance, the working efficiency is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and in particular to a BMS battery balancing system for new energy batteries. Background Art

[0002] With the development of new energy BMS technology, engineers pay close attention to the consistency of each battery cell in the battery. The design principles of the battery pack are:

[0003] When the first battery (cell) is fully charged, charging must be stopped;

[0004] When the first battery (cell) is exhausted, the discharge must be terminated.

[0005] Without using balancing, during the charge and discharge process, due to the different temperatures of different cells, the different physical properties of different cells, and the different storage capacities required for different links of different cells, there will be a charge difference between the cells in the battery pack, and the charge difference will increase with the increase in the number of uses. Eventually, the voltage of one of the cells will always be close to the maximum voltage, while the other cell will be close to the minimum voltage, thereby hindering the charge and discharge capabilities of the battery pack.

[0006] At present, the BMS battery balancing strategies in the existing technology are divided into active balancing and passive balancing. Passive balancing mainly adopts a resistor in series with the battery cell with high power. Through the thermal effect of current, the excess electrical energy of the battery cell is converted into heat energy and consumed, thereby gaining more charging time for other batteries during the charging process; active balancing adopts complex balancing technology to redistribute the charge in the battery cell during the charging and discharging cycle, thereby shortening the charging time and extending the discharge time. The bottom balancing strategy is generally adopted in the discharge mode, and the top balancing strategy is generally adopted in the charging mode.

[0007] However, the passive balancing system in the prior art still has certain shortcomings:

[0008] 1. Passive balancing consumes the energy in the battery cells with more power as heat energy, which also causes energy waste;

[0009] 2. Passive balancing strategies can generally only be used to balance the battery during the charging process, but are difficult to balance during the discharging process. Utility Model Content

[0010] The purpose of the utility model is to solve the problems raised in the above background technology, and to propose a BMS battery balancing system for new energy batteries.

[0011] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0012] A BMS battery balancing system for new energy batteries, including a battery pack, and also including:

[0013] The first terminal and the second terminal are both fixedly connected to the battery pack;

[0014] The battery pack includes a battery cell body and a switch;

[0015] The battery cell body is connected to the switch;

[0016] The top cover is fixedly connected to the battery cell body.

[0017] Preferably, a data acquisition module, a transceiver module, a data storage module and a control module are connected in the top cover, and the data acquisition module, the transceiver module, the data storage module and the control module are all fixedly connected to the inner top wall of the top cover.

[0018] Furthermore, the switch is a single-pole double-throw switch.

[0019] Furthermore, the battery cell bodies are provided in multiple groups, and the multiple groups of battery cell bodies are interconnected.

[0020] Furthermore, two adjacent groups of the battery cell bodies are connected in series.

[0021] Compared with the prior art, the utility model provides a BMS battery balancing system for new energy batteries, which has the following beneficial effects:

[0022] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The utility model can effectively avoid the energy waste in the current mainstream BMS balancing function. At the same time, when some cells in the battery pack are damaged, the system can control the disconnection with these damaged batteries while generating a complete circuit that can continue to be used, without disassembling the battery pack. After testing one by one and replacing the damaged cells with good cells, the used batteries can be recycled and maintained, and the bad cells that may bring risks can be eliminated in advance, thereby improving work efficiency and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the circuit structure of a BMS battery balancing system for new energy batteries proposed in the utility model;

[0024] Figure 2 This is a schematic diagram of the connection structure between the battery cell body and the top cover in a BMS battery balancing system for new energy batteries proposed by the utility model.

[0025] In the figure: 1. first terminal; 2. second terminal; 3. switch; 4. battery cell body; 5. top cover; 501. data acquisition module; 502. transceiver module; 503. data storage module; 504. control module. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Embodiment 1:

[0028] Reference Figure 1-Figure 2 , a BMS battery balancing system for new energy batteries, including a battery pack, and also including:

[0029] The first terminal 1 and the second terminal 2 are both fixedly connected to the battery pack;

[0030] The battery pack includes a battery cell body 4 and a switch 3;

[0031] The battery cell body 4 is connected to the switch 3;

[0032] The top cover 5 is fixedly connected to the battery cell body 4 .

[0033] The top cover 5 is connected with a data acquisition module 501 , a transceiver module 502 , a data storage module 503 and a control module 504 , and the data acquisition module 501 , the transceiver module 502 , the data storage module 503 and the control module 504 are all fixedly connected to the inner top wall of the top cover 5 .

[0034] The data acquisition module 501 is a commercially available data acquisition device;

[0035] The transceiver module 502 is a signal transceiver available on the market;

[0036] The data storage module 503 is a commercially available data storage device;

[0037] The control module 504 is a commercially available signal controller;

[0038] A switch for controlling switch 3.

[0039] The data acquisition module 501, the transceiver module 502, the data storage module 503 and the control module 504 are connected to each other via electrical signals.

[0040] Switch 3 is a single-pole double-throw switch.

[0041] The battery cell bodies 4 are provided in multiple groups, and the multiple groups of battery cell bodies 4 are connected to each other.

[0042] Two adjacent groups of battery cell bodies 4 are connected in series.

[0043] By connecting the battery cell bodies 4 in series, the problem of voltage difference between different branches after some of the battery cell bodies 4 are disconnected can be effectively avoided.

[0044] During use of the utility model, when the single-pole double-throw switch 3 is turned upward and connected to the circuit of the battery body 4, the connected battery body 4 is added to the battery pack circuit, and the circuit can work normally;

[0045] When the SPDT switch 3 is turned downward, the circuit is not connected to both ends of the battery body 4, and the battery body 4 is not added to the battery pack circuit. At this time, the battery body 4 is removed from the battery pack circuit, and the circuit can work normally.

[0046] The utility model optimizes the current recycling and cascade utilization and battery maintenance of used batteries. When some cells in a battery pack are damaged, the system can control the disconnection of these damaged batteries while generating a complete circuit that can continue to be used, without the need to disassemble the battery pack. The damaged cells can be replaced with good cells one by one after inspection before the used batteries can be recycled and maintained, and bad cells that may bring risks can be eliminated in advance, thereby improving work efficiency and reducing maintenance costs.

[0047] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A BMS battery balancing system for new energy batteries, including a battery pack, characterized in that: Also includes: The first terminal (1) and the second terminal (2) are both fixedly connected to the battery pack; The battery pack comprises a battery cell body (4) and a switch (3); The battery cell body (4) is connected to the switch (3); The top cover (5) is fixedly connected to the battery cell body (4).

2. A BMS battery balancing system for new energy batteries according to claim 1, characterized in that: The top cover (5) is connected with a data acquisition module (501), a transceiver module (502), a data storage module (503) and a control module (504); the data acquisition module (501), the transceiver module (502), the data storage module (503) and the control module (504) are all fixedly connected to the inner top wall of the top cover (5).

3. A BMS battery balancing system for new energy batteries according to claim 1, characterized in that: The switch (3) is a single-pole double-throw switch.

4. A BMS battery balancing system for new energy batteries according to claim 2, characterized in that: The battery cell bodies (4) are provided in multiple groups, and the multiple groups of battery cell bodies (4) are interconnected.

5. A BMS battery balancing system for new energy batteries according to claim 4, characterized in that: Two adjacent groups of battery cell bodies (4) are connected in series.

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