Battery pack

A technology for battery packs and battery modules, applied in the direction of batteries, battery pack components, battery caps/end caps, etc., can solve problems such as pressure rise in battery containers

Pending Publication Date: 2022-03-22
日本汽车能源株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a prismatic secondary battery (battery cell) equipped with a sealed battery container, the pressure inside the battery container may rise due to, for example, overcharging, overheating, or damage due to external force.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0030] figure 1 It is an exploded perspective view of the battery pack 100 according to the first embodiment of the present invention. figure 2 It is an exploded perspective view of the battery module 30 of the battery pack 100 according to the first embodiment of the present invention.

[0031] The battery pack 100 according to the first embodiment of the present invention is installed in vehicles such as electric vehicles (EV) and hybrid electric vehicles (HEV), for example. The battery pack 100 stores electric power supplied through a pair of input / output terminals 101 described later in the battery cells 20 , and supplies the electric power stored in the battery cells 20 to electric devices such as motors of the vehicle through the input / output terminals 101 .

[0032] The battery pack 100 includes a battery module 30 including a plurality of battery cells 20 composed of secondary batteries, an electric unit 50 arranged at a predetermined interval from the battery module...

no. 2 Embodiment approach

[0081] In the battery pack 100 according to the second embodiment of the present invention, as Figure 8As shown, an engagement protrusion 82 for holding the edge of the filter 91 is formed along the inner peripheral surface of the duct 80 so as to span one circumference in a portion of the duct 80 on the upstream side with respect to the filter 91 . In addition, as long as the engaging protrusion 82 can hold the filter 91, it may be provided so that it may hold the filter 91 at several places (partially). The engagement protrusion 82 has a first holding surface 82a facing the edge of one surface 91a of the filter 91 and an inclined surface (neck portion) 82b extending from the inner end of the first holding surface 82a toward the inner surface of the duct 80 . The inclined surface 82b is formed such that the inner diameter decreases from the upstream side (the second storage space 70b side) to the downstream side (the side opposite to the second storage space 70b). Thereby, ...

no. 3 Embodiment approach

[0085] In the battery pack 100 according to the third embodiment of the present invention, as Figure 9 As shown, a protrusion 92 c protruding toward the first holding surface 82 a is formed at a predetermined position on the second holding surface 92 a of the holding member 92 . The filter 91 and the nonwoven fabric 93 are sandwiched between the protrusion 92c and the first holding surface 82a. For example, only one protrusion 92c is provided on the second holding surface 92a, and only a part of the filter 91 and the nonwoven fabric 93 are sandwiched. Thus, when the engaged state of the filter 91 is released due to the gas pressure, the filter 91 can be prevented from flying into the duct 95, so it can be prevented that the filter 91 sticks to the duct 95 or the duct 95 blocked inside.

[0086] In addition, the protruding portion 92c is arranged at a predetermined distance from the first holding surface 82a. The distance between the protrusion part 92c and the 1st holding ...

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PUM

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Abstract

The invention provides a battery pack which can prevent other battery cells from becoming high temperature due to gas discharged from the battery cells and store the gas in the battery pack as much as possible. This battery pack (100) is provided with a battery module (30), an electric unit (50), and a case (70). A first housing space (70a) for housing a battery module (30) and a second housing space (70b) for housing an electric unit (50) are provided inside a case (70), a duct (80) for communicating the second housing space (70b) and the outside of the case (70) is provided in a portion of the case (70) forming the second housing space (70b), and a filter (91) for closing a gas passage (80a) of the duct (80) is provided on the duct (80). The filter (91) opens the gas passage (80a) of the duct (80) when the gas pressure in the second housing space (70b) becomes equal to or greater than a predetermined value with respect to the gas pressure outside the housing (70).

Description

technical field [0001] The present invention relates to a battery pack including a battery module including a plurality of battery cells, and a case for accommodating the battery module. Background technique [0002] Conventionally, in the field of rechargeable secondary batteries, aqueous solution-based batteries such as lead batteries, nickel-cadmium batteries, and nickel-hydrogen batteries have been the mainstream. However, with the miniaturization and weight reduction of electrical equipment, lithium-ion secondary batteries with high energy density have attracted attention, and their research, development, and commercialization are rapidly advancing. In addition, due to the problems of global warming and fuel depletion, various automakers have developed electric vehicles (EVs), hybrid electric vehicles (HEVs) that use electric motors to assist a part of the drive, and are seeking high-capacity, high-power secondary battery as its power source. [0003] As a power sourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/209H01M50/30
CPCH01M50/209H01M50/30H01M2220/20H01M50/249H01M50/3425Y02E60/10H01M50/271
Inventor 内藤匡仲元正至
Owner 日本汽车能源株式会社
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