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Battery pack

A technology for battery packs and secondary batteries, which is applied to battery pack components, secondary batteries, circuits, etc., can solve the problem that the slits on the long side of the long-side separator cannot be eliminated.

Active Publication Date: 2020-09-11
PANASONIC ENERGY CO LTD MORIGUCHI SHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since a structure for electrically connecting battery strings is required, it is impossible to eliminate the long-side slits of the long-side separators and seek effective countermeasures.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0058] exist Figure 1 to Figure 9 The battery pack according to Embodiment 1 of the present invention is shown. In these figures, figure 1 is a perspective view showing the battery pack 100 according to Embodiment 1, figure 2 from obliquely below figure 1 A perspective view of the battery pack 100, image 3 yes figure 1 A sectional view of the III-III line of the battery pack 100, Figure 4 yes figure 1 A sectional view of the IV-IV line of the battery pack 100, Figure 5 yes figure 1 An exploded perspective view of the battery pack 100, Figure 6 is said to be figure 1 A perspective view of a state in which the cover portion 11 of the battery pack 100 is removed, Figure 7 yes Figure 6 A top view of the battery pack 100, Figure 8 is expressed in figure 1 An exploded perspective view of a state where the storage case 10 is mounted with the long-side partition plate 30 and the short-side partition plate 40, Figure 9 is expressed in Figure 8 An explod...

Embodiment approach 2

[0105] (absorber 60)

[0106] Furthermore, thermal runaway can also be controlled by arranging the heat absorber 60 in the storage case. Thereby, even if any secondary battery cell in the housing case runs away thermally, the heat absorber 60 can absorb the heat generated by the secondary battery cell that is thermally runaway, and the heat transfer to the adjacent secondary battery cells can be suppressed. Out of control chain. By arranging the heat absorber 60 in the battery storage space 16 , the heat absorber 60 can be efficiently arranged in a storage case with a limited volume without preparing a separate space for the heat absorber 60 . Especially when the number of battery storage spaces is greater than the number of secondary battery cells, by arranging the heat absorber 60 in the battery storage spaces where no secondary battery cells are stored, the excess battery storage space can be effectively utilized.

[0107] A battery pack including such a heat absorber 60 ...

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PUM

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Abstract

The present invention prevents cascading thermal runaway between a plurality of secondary battery cells arranged side-by-side horizontally. Cylindrical first battery cells (1A) and cylindrical secondbattery cells (1B) which are connected to each other in series and / or in parallel are accommodated side-by-side such that the respective cylindrical side surfaces face each other. A battery pack (100)is provided with: a long partition plate (30) which is disposed at interfaces between the mutually facing-cylindrical side surfaces of the first secondary battery cells (1A) and the second secondarybattery cells (1B) accommodated in an inner space of the accommodation case (10), and thereby insulates these secondary battery cells; a lead plate (22) which crosses the long partition plate (30) andelectrically connects end surfaces of the first secondary battery cells (1A) and the second secondary battery cells (1B); and a short partition plate (40) which crosses the long partition plate (30)while overlapping with the lead plate (22) and covers the end surfaces of the first secondary battery cells (1A) and the second secondary battery cells (1B), wherein a long-side slit (32) for passingthe short partition plate (40) and the lead plate (22) while the plates overlap with each other is formed in the long partition plate (30).

Description

technical field [0001] The present invention relates to batteries. Background technique [0002] A battery pack in which a plurality of cylindrical secondary battery cells are housed in a housing case is used as a power source for electronic devices such as notebook personal computers and portable electronic terminals. In this battery pack, a plurality of cylindrical secondary battery cells are connected in series and in parallel to increase capacity. In particular, in recent years, the capacity of the battery pack has been increased, and on the other hand, from the viewpoint of portability and the like of the battery pack, there has been a demand for a smaller and lighter battery pack. For this reason, the capacity of each secondary battery cell is increased, and a structure in which the secondary battery cells are arranged side by side without gaps is adopted inside the battery pack. [0003] On the other hand, secondary battery cells may sometimes experience thermal run...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M2/20H01M10/653H01M10/6554H01M10/658H01M50/213H01M50/291H01M50/50
CPCH01M10/653H01M10/6554H01M10/658Y02E60/10H01M50/50H01M10/613H01M10/643H01M50/213H01M50/502H01M50/289H01M50/291
Inventor 多田学高辻勇贵辻口隆介大野伦伸
Owner PANASONIC ENERGY CO LTD MORIGUCHI SHI