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Cell module

A technology for battery modules and battery packs, which is applied to secondary batteries, battery pack components, circuits, etc., and can solve problems such as battery module life-span and achieve the effect of extending life

Active Publication Date: 2014-05-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that when the life of a specific cylindrical battery cell is nearing the end, even if other cylindrical battery cells are in good condition, the life of the battery module is also near the end.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] figure 1 It is a schematic perspective view showing the structure of the battery module 100 according to the first embodiment of the present invention. in addition, figure 2 is a schematic front view of the front surface of the battery module 100, image 3 is a top view, Figure 4 It is a bottom view.

[0034] The battery module 100 is a battery module in which six sets of assembled batteries 10 (10a, 10b, 10c, 10d, 10e, 10f) are connected in series through a plurality of conductive plates 2 (2a, 2b, 2c).

[0035] Each assembled battery 10 is composed of seven cylindrical battery cells 1 (1a, 1b, 1c, 1d, 1e, 1f, 1g) arranged in a straight line and connected in parallel by a positive electrode collector plate 21 and a negative electrode collector plate 22. constitute.

[0036] The cylindrical battery cell 1 is a cylindrical battery having a positive electrode (+) at one end in the longitudinal direction and a negative electrode (−) at the other end. In the assemb...

no. 2 Embodiment approach

[0052] refer to Figure 5 ~ Figure 6 A battery module 110 of another embodiment of the battery module of the present invention will be described. Figure 5 is a schematic perspective view showing the structure of the battery module 110 . in addition, Figure 6 is a schematic bottom view of the battery module 110 . In addition, regarding the use in the first embodiment Figure 1 ~ Figure 4 Elements to be described The same reference numerals are used for the same elements.

[0053] The battery module 110 is the same as the battery module 100 except that the connection positions of the positive electrode lead and the negative electrode lead are changed, and the type of the conductive plate is replaced.

[0054] In the battery module 110 , the positive electrode lead 112 is connected to the positive electrode collector plate 21 in the vicinity of the cylindrical battery cells 1 d in the fourth row located in the center of the assembled battery 10 a in the first row as the pos...

no. 3 Embodiment approach

[0060] refer to Figure 7 and Figure 8 A battery module 120 of another embodiment of the battery module of the present invention will be described. Figure 7 is a schematic perspective view of the battery module 120, Figure 8 It is a schematic diagram of looking up. In addition, regarding the use in the first embodiment Figure 1 ~ Figure 4 Elements to be described The same reference numerals are used for the same elements.

[0061] The battery module 120 is the same as the battery module 100 except that the connection positions of the positive electrode lead and the negative electrode lead are changed, and the type of the conductive plate is replaced.

[0062] In the battery module 120 , the positive electrode lead 212 is connected to the positive electrode collector plate 21 in the vicinity of the cylindrical battery cell 1g in the seventh row, which is the terminal of the assembled battery 10a in the first row, which is the positive electrode terminal. Accordingly, t...

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PUM

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Abstract

It is intended to provide a battery module having a long life by designing such that deterioration proceeds evenly among battery cells. Disclosed is a battery module including a plurality of battery groups being connected in series and each comprising a plurality of battery cells connected in parallel, wherein: a positive electrode terminal and a negative electrode terminal are provided; the battery groups are connected to each other by a plurality of electrically conductive strips; and an electrical resistance value of the conductive strip arranged at a position near a virtual line drawn between the positive electrode terminal and the negative electrode terminal is high, and an electrical resistance value of the conductive strip arranged at a position other than the position near the virtual line is low, the electrical resistance value being measured in a direction of charge and discharge current flow.

Description

technical field [0001] The present invention relates to a battery module formed by connecting a plurality of sets of batteries formed by connecting a plurality of battery cells in parallel and then connecting them in series. Specifically, it relates to a battery module with an improved connection method for battery packs. Background technique [0002] Batteries have begun to be used as power sources for transportation equipment, working equipment, power storage equipment, etc. in addition to being used as driving power sources for electrical and electronic equipment. Batteries used for transportation equipment, operating equipment, and power storage equipment require instantaneous or continuous high output. An assembled battery in which a plurality of battery cells is connected and a battery module in which such an assembled battery is further connected meet such requirements. [0003] For example, Patent Document 1 discloses a battery pack in which a plurality of battery ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/20H01M2/10H01M50/507H01M50/509
CPCY02E60/12H01M10/4207H01M2/206H01M10/441Y02E60/10H01M50/507H01M50/509H01M50/50H01M50/20
Inventor 汤浅真一朝仓淳
Owner PANASONIC CORP