Battery set

A technology for battery packs and battery cells, which is applied in battery pack components, secondary battery manufacturing, circuits, etc., can solve problems such as being unfavorable for application and increasing the overall weight of the battery pack, and achieve the effect of avoiding battery pack disconnection.

Active Publication Date: 2009-01-28
SUZHOU ANKAO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will increase the overall weight of the battery pack, which is not conducive to the application

Method used

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Examples

Experimental program
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Effect test

specific Embodiment 1

[0019] A battery pack, including several parallel branches 2 connected in parallel by battery cells 1 through busbars 5, and the corresponding battery cells 1 between the groups of parallel branches 2 are connected in series to form several series branches 3, such as figure 2 and image 3 As shown, each row of battery cells 1 forms a parallel branch 2, and each column of battery cells 1 forms a series branch 3, and each series branch 3 on the parallel battery pack 2 at the output end is connected to the output terminal through an independent conductor 4. 6 connections. The currents on the independent conductors between each series branch 3 and the output terminal 6 are similar or equal.

[0020] The independent conductors 4 are wires, and the resistances of the wires connected to the same output terminal 6 are similar or equal. For example, wires with the same resistivity×length÷cross-sectional area are used to make the load current of each single battery in the parallel ba...

specific Embodiment 2

[0022] A battery pack, including several parallel branches 2 connected in parallel by battery cells 1 through busbars 5, and the corresponding battery cells 1 between the groups of parallel branches 2 are connected in series to form several series branches 3, such as figure 2 and image 3 As shown, each row of battery cells 1 forms a parallel branch 2, and each column of battery cells 1 forms a series branch 3, and each series branch 3 on the parallel battery pack 2 at the output end is connected to the output terminal through an independent conductor 4. 6 connections. The currents on the independent conductors between each series branch 3 and the output terminal 6 are similar or equal.

[0023] The independent conductors 4 are wires, and the resistances of the wires connected to the same output terminal 6 are similar or equal. For example, wires with the same resistivity×length÷cross-sectional area are used to make the load current of each single battery in the parallel ba...

specific Embodiment 3

[0025] A battery pack, including several parallel branches 2 connected in parallel by battery cells 1, and the corresponding battery cells 1 between the groups of parallel branches 2 are connected in series to form several series branches 3, such as Figure 4 As shown, each row of battery cells 1 forms a parallel branch 2 , and each row of battery cells 1 forms a series branch 3 , and each series branch 3 on the output parallel battery pack 2 is connected to a current collector 8 .

[0026] like Figure 5 As shown, the thickness direction of the current collector 8 increases or decreases stepwise.

[0027] like Image 6 As shown, the thickness direction of the current collector 8 increases or decreases linearly.

[0028] The battery pack is connected with an external circuit through a current collector output terminal 10 . The external circuit is connected to the thicker end of the current collector 8 .

[0029] The directions of the positive and negative battery pack outp...

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PUM

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Abstract

The invention discloses a battery pack, comprising a plurality of parallel branches formed by connecting a plurality of battery units in parallel. The corresponding battery units between the parallel branches are serially connected into a plurality of serial branches, each serial branch is respectively connected with an output terminal through an independent conductor, or each serial branch is connected with a current collector with uniform current density. Compared with the prior art, current on each serial branch can not accumulate on collecting bars of the parallel branches, and the the current density of each part of output part circuits is the same, thereby avoiding that performances of the battery pack are affected because the circuits are damaged by local overlarge current density of the collecting bars under the condition of heavy current.

Description

technical field [0001] The invention relates to a battery pack, in particular to a storage battery capable of providing high current and high power by using small batteries connected in series and in parallel. Background technique [0002] Batteries can be used as the starting and traction power of motor vehicles or other devices. According to the voltage and capacity requirements of the load, multiple single batteries are often combined in series and parallel to increase the voltage through series connection and increase the capacity through parallel connection. The general method is to first connect a certain number of single cells with a bus bar to connect all the positive electrodes together, and then use another bus bar to connect all the negative electrodes together, thus forming a parallel branch. Multiple series branches are formed by connecting the single cells corresponding to the same position in the multiple parallel branches according to the sequence of positive...

Claims

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Application Information

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IPC IPC(8): H01M2/20H01M10/04
CPCY02E60/10Y02P70/50
Inventor 董明李革臣许玉林李相哲岳江宁虞章星
Owner SUZHOU ANKAO ENERGY
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