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Lithium ion battery

A lithium-ion battery and cell technology, which is applied in the field of lithium-ion batteries, can solve the problems of limited space and limited space for thinning of the bottom end cap, and achieve the advantages of enhancing the overall mechanical strength and reliability, easy control, and increasing safety. Effect

Inactive Publication Date: 2009-01-14
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the top end cover needs to cover the protective circuit board and temperature protection device, the space obtained by reducing the top end cover is limited
Since the bottom end cap adopts the form of plastic injection molding, regardless of the requirements of the plastic molding process or the mechanical strength of the bottom end cap, the space for thinning the bottom end cap is also limited.

Method used

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Examples

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Embodiment

[0029] Example, a lithium-ion battery such as Figure 4-9 As shown, the battery cell 11 , the end cap 31 and the label 21 are included.

[0030] The battery cell 11 includes a metal casing, positive and negative electrode sheets, separators and electrolytes encapsulated by the metal casing; the top of the battery core 11 is the electrode lead-out end, which leads out the positive and negative electrodes of the lithium ion battery, and the end cap 31 passes through The top of the battery cell 11 is covered by means of bonding or integral injection molding.

[0031] The label 21 is attached to the side wall of the battery cell 11 , has the function of insulation, and can be used to mark the battery at the same time, and the label can be made of PET material.

[0032] The bottom of the metal shell of the battery cell 11 is provided with a positioning member 7, and the positioning member 7 is used for assembling with the load. In this embodiment, the positioning member 7 is forme...

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Abstract

The invention discloses a Li ion battery, which comprises the following parts: electric core, label and end lid, wherein the electric core contains metal case and positive and negative pole piece in the metal case, diaphragm and electrolytic solution; the end lid covers electrode terminal of electric core; the metal case of electric core contains locating part to assemble and load; the locating part is set at the relative end of electric core electrode terminal. The invention saves bottom end lid to improve height space of electric core, which reinforces the whole mechanic strength and reliability of Li battery greatly.

Description

technical field [0001] The present invention relates to a lithium ion battery. Background technique [0002] In recent years, mobile terminal devices such as mobile phones, personal digital assistants (PDAs), notebook computers, and portable digital versatile disks (Portable digital versatile disks, portable DVDs) have all developed in the direction of multi-function and miniaturization. , which means that there will be less and less space for lithium-ion batteries that provide power for these mobile terminal devices, and the capacity of lithium-ion batteries is required to be greatly increased. [0003] In order to increase the effective volume of the lithium-ion battery, thereby increasing the capacity of the entire lithium-ion battery, such as Figure 1-3 The latest lithium-ion battery shown uses the structure of a cell 1, a label 2, and a top end cap 3 and a bottom end cap 4. [0004] The battery cell 1 includes a metal casing, positive and negative electrode sheets, a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/40H01M10/0525
CPCY02E60/122H01M10/052Y02E60/10
Inventor 张春昱张中林
Owner BYD CO LTD
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