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Storage battery and storage battery pack

A battery and cell technology, applied to battery components, batteries, secondary batteries, etc., can solve the problems of poor electrochemical performance of batteries, achieve the effect of maintaining electrochemical performance, improving safety performance, and good packaging status

Inactive Publication Date: 2018-05-29
桑德新能源技术开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide a storage battery to solve the technical problem of poor electrochemical performance of the storage battery when adding a flame retardant to the electrolyte of the storage battery to improve its flame retardancy in the prior art
[0005] The second object of the present invention is to provide a battery pack to solve the safety problem of the prior art battery pack and prevent the occurrence of joint combustion

Method used

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  • Storage battery and storage battery pack

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Such as figure 1 As shown, the present embodiment is a storage battery 30, the storage battery 30 is a lithium iron phosphate lithium ion battery, including a battery cell 20 and an aluminum-plastic film 10 for packaging the battery cell, wherein the battery cell 20 includes a positive pole piece 21, Negative pole piece 23, separator 22 and electrolyte between the positive pole piece and the negative pole piece.

[0072] Such as figure 2 As shown, the aluminum-plastic film 10 mainly includes an outer protective layer 13 , an intermediate aluminum layer 12 and an inner adhesive layer 11 . Wherein, the protective layer 13 is a nylon layer, and the bonding layer 11 is a PP layer. The thickness of the PP layer in the aluminum-plastic film is 20 μm, and the flame retardant microcapsules 14 are embedded inside, and the flame retardant microcapsules 14 account for 40% of the total volume of the PP layer. Among them, the flame retardant microcapsule 14 has a particle size o...

Embodiment 2

[0075] This embodiment is a storage battery, which is a lithium iron phosphate lithium ion battery, and its structure is the same as that of the storage battery in Embodiment 1.

[0076] The aluminum-plastic film in this embodiment mainly includes an outer protective layer, a middle aluminum layer and an inner adhesive layer. Wherein, the protective layer is a nylon layer, and the bonding layer is a PP layer. The thickness of the PP layer in the aluminum-plastic film is 25 μm, and the flame retardant microcapsules are embedded inside, and the flame retardant microcapsules account for 50% of the total volume of the PP layer. Among them, the particle size of the flame retardant microcapsule is 8-13 μm, the capsule shell is polymerized from polyethylene glycol and polyurea, the melting point temperature is 120-140°C, and the material of the flame retardant is triethyl phosphate.

Embodiment 3

[0078] This embodiment is a storage battery, which is a lithium iron phosphate lithium ion battery, and its structure is the same as that of the storage battery in Embodiment 1.

[0079] The aluminum-plastic film in this embodiment mainly includes an outer nylon layer, a middle aluminum layer and an inner PP layer. The thickness of the PP layer in the aluminum-plastic film is 20 μm, and the flame retardant microcapsules are embedded inside, and the flame retardant microcapsules account for 30% of the total volume of the PP layer. Among them, the particle size of the flame retardant microcapsule is 10-15 μm, the capsule shell is polymerized by polyvinyl chloride and polyethylene glycol, the melting point temperature is 140-150 ° C, and the material of the flame retardant is trimethyl phosphate.

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Abstract

The invention provides a storage battery and a storage battery pack, and relates to the technical field of battery. The storage battery includes an electric core and an aluminum plastic film for encapsulating the electric core, and a flame retardant microcapsule is embedded in the aluminum plastic film. With use of the storage battery, the technical problem of poor electrochemical performance of astorage battery caused when a flame retardant is added in an electrolyte solution of the storage battery to improve the flame retardancy in the prior art can be solved, and the effect of improving the flame retardancy of the storage battery without reduction of the electrochemical performance of the battery can be achieved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery and a battery pack. Background technique [0002] In recent years, the market demand for lithium-ion batteries has continued to boom, and laboratory research on rechargeable batteries such as lithium-sulfur batteries, sodium-ion batteries, and lithium-air batteries has also made great progress. In addition to energy density and lifespan, safety is also an important factor restricting the development of various types of rechargeable batteries. [0003] Aluminum-plastic film packaging (soft pack battery) is an important packaging form for rechargeable batteries such as lithium-ion batteries, lithium-sulfur batteries, sodium-ion batteries, and zinc-air batteries. However, the traditional aluminum-plastic film only plays the role of packaging protection. In the battery system, the thermal runaway of a pouch battery can easily cause the adjacent batteries and materials t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/10H01M10/0525H01M50/124H01M50/24
CPCH01M10/0525H01M2200/10H01M50/124H01M50/24Y02E60/10
Inventor 孙敏敏娄忠良温转萍范欢欢文一波胡泽林
Owner 桑德新能源技术开发有限公司
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