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Connection method of tree structure of matrix battery bank

A technology of tree structure and connection method, which is applied in the direction of battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of poor scalability and achieve the effects of reducing replacement costs, prolonging service life, and facilitating expansion

Pending Publication Date: 2010-10-13
ZHEJIANG LUYUAN ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing battery series balance technology is limited to the overall balance of the battery pack, and the scalability is poor; the battery parallel balance technology is only directly connected in parallel with wires.

Method used

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  • Connection method of tree structure of matrix battery bank
  • Connection method of tree structure of matrix battery bank
  • Connection method of tree structure of matrix battery bank

Examples

Experimental program
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Effect test

Embodiment Construction

[0013] The method of the present invention will be described in detail below by taking a 3V lithium battery as an example.

[0014] Such as figure 1 As shown, forty single 3V small batteries 1 are first passed through 4 strings 10 to form a 12V battery pack, and the single 3V small batteries 1 are connected to the single protection circuit 3, and connected to the parallel equalization circuit 4 and the series equalization circuit 5;

[0015] Such as figure 2 As shown, will figure 1 The 12V battery pack 2 used as a new unit cell is connected in series to form a 48V battery pack, and the parallel equalization circuit 4 is connected between the battery packs, and the series equalization circuit 5 is connected between the parallel equalization circuits. The charge and discharge protection of a single battery is carried out, so there is no need to protect the 12V cell;

[0016] Such as image 3 As shown, will figure 2 The connected 48V battery pack 6 is used as a new unit ba...

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PUM

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Abstract

The invention belongs to the category of storage batteries and specifically provides a connection method of the tree structure of a matrix battery bank. The method is characterized by unitizing the batteries, connecting the low-voltage and small-capacity single small batteries in series to form a battery pack, connecting each single small battery in the battery pack with a single protection circuit and simultaneously connecting parallel equalizing circuits with series equalizing circuits to form a complete battery protection system; using the battery pack as a new elementary battery, then combining parallel connection with series connection to form a bigger matrix battery pack, connecting the parallel equalizing circuits between the battery packs on the same level and adding the series equalizing circuits between the series connection layers; and then using the matrix battery pack as a new elementary battery to form another bigger matrix battery pack, doing the rest in the same manner and finally forming the large high-voltage and high-capacity matrix battery bank of tree structure. The method can effectively eliminate the capacity variance caused by the power battery technology and the manufacturing process level, thus prolonging the service life of the battery bank.

Description

technical field [0001] The invention belongs to the category of storage battery packs, in particular to a connection method of a tree structure of matrix battery packs. Background technique [0002] Based on the current power battery technology and manufacturing process level, the performance difference between battery cells exists objectively throughout its life cycle, which leads to the unbalanced capacity of one or several batteries in the secondary battery pack. Affect the performance of the entire battery pack, and in severe cases may cause the entire battery pack to collapse. For example, in the combination of a large matrix battery pack, many small unit cells are required. Due to the differences in capacity and various performances caused by power battery technology and manufacturing process levels, it is easy to cause some batteries to be damaged during the use of a large matrix battery pack. Overcharge or overdischarge, and some other batteries will be undercharged...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCY02E60/10
Inventor 倪捷胡继红陈文胜张芳勇盛专成陈校校
Owner ZHEJIANG LUYUAN ELECTRIC VEHICLE
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