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Battery pack and method of manufacturing battery pack

A battery pack and battery technology, applied in battery pack components, electrolyte storage battery manufacturing, secondary batteries, etc., can solve problems such as difficulty in meeting use requirements, short cycle life, reduced battery safety, etc., to meet use requirements, improve Reserves, the effect of improving the service life

Pending Publication Date: 2020-09-29
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a battery pack and a method for preparing the battery pack, which are used to solve the problem that the battery pack is easily deformed or damaged when it is squeezed or collided with the outside world, resulting in reduced battery safety and short cycle life, which is difficult to meet Questions about usage requirements

Method used

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  • Battery pack and method of manufacturing battery pack
  • Battery pack and method of manufacturing battery pack
  • Battery pack and method of manufacturing battery pack

Examples

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preparation example Construction

[0048] The embodiment of the present invention also provides a method for preparing a battery pack. The preparation method of the battery pack comprises:

[0049] Provide multiple batteries;

[0050] A plurality of batteries are arranged in sequence; wherein, each battery includes a casing 10 and a battery cell 30 arranged in the casing 10, the battery cell 30 is filled with electrolyte, and the first side of the battery cell 30 in at least one battery A functional layer 20 is provided. The first side of the cell 30 is the side of the cell 30 facing the arrangement direction of the batteries. The functional layer 20 has a porous structure. In the battery pack prepared by the above method, a functional layer 20 is provided on the first side of the cell 30 in at least one battery, the electrolyte can be stored through the pore structure in the functional layer 20, and the storage capacity of the electrolyte in the battery can be increased. The electrolyte can be released durin...

Embodiment 1

[0060] The selected functional layer has a compressive deformation rate of 10%, a porosity of 20%, and a thickness of 2.5mm;

[0061] After fully mixing the positive electrode material, conductive agent, binder, and solvent, coat and dry to prepare the positive electrode sheet; after fully mixing the negative electrode material, conductive agent, binder, additive, and solvent, coat and dry to prepare the negative electrode pole piece; and prepare the positive pole piece, the negative pole piece, and the diaphragm into a lithium-ion battery cell;

[0062] The functional layer is placed on the first side and the second side of the battery cell, sealed with aluminum-plastic packaging film, after baking, the battery cell is injected with electrolyte, hot-pressed to form a package, and a lithium-ion battery with a functional layer is obtained.

[0063] Six single cells with functional layers are connected in parallel or in series to form a battery pack.

Embodiment 2

[0065] The selected functional layer has a compressive deformation rate of 10%, a porosity of 20%, and a thickness of 1mm;

[0066] After fully mixing the positive electrode material, conductive agent, binder, and solvent, coat and dry to prepare the positive electrode sheet; after fully mixing the negative electrode material, conductive agent, binder, additive, and solvent, coat and dry to prepare the negative electrode Pole piece;

[0067] And prepare the positive pole piece, the negative pole piece, and the diaphragm into a lithium-ion battery cell;

[0068] Put the functional layer on the first side of the battery cell, seal it with aluminum-plastic packaging film, inject liquid into the battery cell after baking, heat-press and seal it, and obtain a lithium-ion battery with a functional layer;

[0069] Arrange six single cells with functional layers in sequence, with the first side of the functional layers facing the same direction, and form a battery pack by connecting ...

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Abstract

The invention provides a battery pack and a preparation method of the battery pack. The battery pack includes multiple batteries, wherein a plurality of batteries are arranged in sequence, each battery comprises a shell and a battery cell arranged in the shell, the battery cell is filled with electrolyte, a functional layer is arranged on a first side of the battery cell in at least one battery, the first side of the battery cell is the side, facing the arrangement direction of the batteries, of the battery cell, and the functional layer is provided with a pore structure. The battery pack is advantaged in that the electrolyte can be stored through a pore structure in the functional layer, the storage capacity of the electrolyte in the battery is improved, the electrolyte can be released inthe compression deformation process of the battery, the functional layer has certain buffering and protecting effects, a problem that the battery pack deforms or is damaged when being extruded or collided by the outside is solved, safety of the battery is improved, the service life of the battery is prolonged, and use requirements are met.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery pack and a method for preparing the battery pack. Background technique [0002] With the development of digital, power and energy storage fields, the demand for lithium-ion secondary batteries is increasing. At present, lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, electrolytes and separators, but the current lithium-ion battery life and charge and discharge expansion have not been practically resolved, especially in the development of energy storage, power and 3C digital fields. Ion batteries are safer, have higher energy density, longer life, and lower swell that affects the overall system. In the existing lithium-ion battery pack, the battery pack is easily deformed or damaged when it is squeezed or collided by the outside world, resulting in reduced battery safety and short cycle life, making it difficult to meet the use r...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 刘春洋李素丽陈若凡
Owner ZHUHAI COSMX BATTERY CO LTD
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