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Battery pack, manufacturing method and disassembly method thereof

A manufacturing method and technology for battery packs, which are applied in the manufacture of secondary batteries, battery pack components, secondary batteries, etc., can solve problems such as damage, failure to maintain the confinement pressure of single cells, and plastic deformation of fastening members.

Active Publication Date: 2022-02-08
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the structure where the end plate and the restraint band are restrained by fasteners, such loads tend to concentrate on the fasteners, etc., and the fastening members may be plastically deformed or damaged.
If the fastening member is plastically deformed or damaged, the restraint of the single cell is relaxed, and the restraint pressure required by the single cell cannot be maintained

Method used

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  • Battery pack, manufacturing method and disassembly method thereof
  • Battery pack, manufacturing method and disassembly method thereof
  • Battery pack, manufacturing method and disassembly method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0042] [Battery]

[0043] figure 1 is a front view schematically showing a battery pack 1 according to an embodiment, figure 2 is its side view. The battery pack 1 includes a plurality of single cells 10 and a restraint mechanism 20 . The plurality of single cells 10 are arranged along a predetermined arrangement direction Z. The restraint mechanism 20 is a member for restraining these single cells 10 so that they can be handled as a set of batteries. Each element will be described below.

[0044] [single battery]

[0045] image 3 is a three-view diagram schematically showing the unit cell 10 . Typically, the cell 10 is a secondary battery that can be repeatedly charged and discharged, such as a lithium ion secondary battery, a nickel hydrogen battery, an electric double layer capacitor, or the like. In addition, for secondary batteries, in order to improve safety, the practical application of all-solid-state batteries is advancing. This all-solid-state battery does ...

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Abstract

The present invention provides a battery pack including a constraining mechanism that is less likely to loosen or break even when a restraining pressure higher than conventional ones is applied, and a method for manufacturing and disassembling the battery pack. The battery pack disclosed here includes a plurality of single cells arranged in an array direction and a restraint mechanism for restraining the single cells. The constraining mechanism includes: a first end plate disposed at the end of the first direction in the arrangement direction of the plurality of cells; a second end plate disposed at the end of the second direction; a ring-shaped constraining hoop , including a first support portion disposed on a surface in a first direction of the first end plate portion, a second support portion disposed on a surface in a second direction of the second end plate portion, and aligning the first support portion with the A pair of side wall portions continuously connected between the second supporting portion. The size of the alignment direction between the first end plate portion and the second end plate portion of the restraining hoop portion is set to apply a predetermined restraining pressure to the plurality of single cells in a compression direction along the alignment direction.

Description

technical field [0001] The present invention relates to a battery pack formed by arranging and bundling a plurality of secondary batteries, a manufacturing method and a disassembling method thereof. [0002] This application claims priority based on Japanese Patent Application No. 2018-003872 filed on January 12, 2018, the entire contents of which are incorporated herein by reference. Background technique [0003] In recent years, secondary batteries such as lithium-ion batteries have been used as portable power sources such as personal computers and portable terminals, as power sources for driving vehicles such as electric vehicles (EV), hybrid vehicles (HV), and plug-in hybrid vehicles (PHV), As well as power supplies for power storage, etc. have become indispensable. In addition, in order to efficiently connect a plurality of single cells (battery cells) in series or in parallel for a battery that requires a large capacity and high output, it is generally configured by s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/258H01M50/204H01M50/264H01M50/244H01M10/04
CPCH01M10/04H01M50/264H01M50/204H01M10/0481H01M10/0525H01M10/0565H01M10/0562H01M50/233H01M50/211H01M50/244
Inventor 藤岛正刚北浦诚之
Owner TOYOTA JIDOSHA KK
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