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Heteromorphic high-rate polymer lithium ion battery

A technology for lithium-ion batteries and lithium-ion battery packs, applied in secondary batteries, battery pack parts, non-aqueous electrolyte storage batteries, etc. Limitation, uniformity decline and other issues, to achieve the effect of heat dissipation, increase the sealing temperature, and improve battery efficiency

Active Publication Date: 2010-09-29
厦门太和动力电源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, as the current distribution of a square battery increases with the increase in size and capacity, its uniformity decreases. If the lug of a cylindrical single battery is used, the conduction area is limited, and the eddy current phenomenon is serious. When discharging at a high rate, the internal The resistance increases, the temperature rises, and the polarization phenomenon is serious
[0007] Therefore, the traditional polymer regular-shaped lithium-ion battery is not suitable for the existing cylindrical high-current power battery

Method used

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  • Heteromorphic high-rate polymer lithium ion battery

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Embodiment Construction

[0040] The preferred embodiments of the present invention will be described in further detail in conjunction with the accompanying drawings.

[0041] The battery sheet 1 in the present invention includes a positive electrode film 211 and two negative electrode films 12, the positive electrode film 11 is located in the middle, and a negative electrode film 12 is stacked on each side, as figure 2 , image 3 shown. The positive and negative membranes are separated by a porous ceramic diaphragm 13, and under the condition of thermal polymerization and curing of the high-temperature electrolyte 15, a battery sheet 1 is formed, which is generally called a bare battery in the industry.

[0042] Take 8 pieces of battery sheet 1, overlap and stack them together, and heat seal the aluminum-plastic film synthesized by multi-layer composite materials to form battery 2, such as image 3 , Figure 4 shown. In this embodiment, one-half of the total number of battery sheets 1 , that is, ...

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Abstract

The invention mainly discloses a heteromorphic high-rate polymer lithium ion battery piece, which comprises a fully heteromorphic positive film, a fully heteromorphic negative film and a ceramic diaphragm. The heterotype is a quadrangle, and one edge is an arc; two adjacent edges of the arc are parallel with each other; a fourth edge is vertical to the two parallel edges; and ears of an anode anda cathode are positioned on the fourth edge. At least one battery piece is subjected to heat sealing by an aluminum plastic packaging film which is compounded by multiple layers of composite materials to form batteries; and the batteries are overlapped and assembled in a series-parallel connection mode to form a battery pack. An effective implementation space of the batteries which are prepared from the heteromorphic battery piece is used fully in a cylindrical battery carrier cavity; and the current density in the battery piece is uniform, and the arc edge of the heteromorphic battery pack is consistent with a curve of the carrier to realize the contact of heat conduction surfaces, so that the heat dissipation efficiency is effectively improved when a large current is discharged.

Description

technical field [0001] The invention relates to the application technical field of polymer lithium-ion secondary power batteries, in particular to a special-shaped high-rate polymer lithium-ion battery suitable for a carrier-shaped cavity. Background technique [0002] With the development of modern society, the shortage of petroleum energy, and the energy demand and application of more and more industries, the assembly space related to high-energy power battery packs is a non-traditional regular square shape. The capacity and occupation of this special-shaped cavity The space ratio is becoming more and more demanding. [0003] In a traditional polymer lithium-ion power battery, the battery 10 is a regular square, such as figure 1 shown. Firstly, the distance between the tabs 20 of the conventional battery and the points on the edge of the battery core is not equal, resulting in uneven distribution of the ion movement process and making it impossible to perform high-curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0585H01M2/26H01M10/50H01M10/613H01M50/528H01M50/533H01M50/534
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 马军玲王小峰
Owner 厦门太和动力电源科技有限公司
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