Heteromorphic high-rate polymer lithium ion battery

A lithium-ion battery, high-rate technology, applied in the direction of secondary batteries, battery pack components, non-aqueous electrolyte storage batteries, etc. Uniformity decline and other problems, to achieve the effect of heat dissipation, increase sealing temperature, and improve battery efficiency

Active Publication Date: 2013-05-01
厦门太和动力电源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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
  • Heteromorphic high-rate polymer lithium ion battery
  • Heteromorphic high-rate polymer lithium ion battery

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Embodiment Construction

[0040] With reference to the drawings, the preferred embodiments of the present invention will be further described in detail.

[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 both sides, such as figure 2 , image 3 Shown. The positive and negative electrodes are separated by a porous ceramic separator 13 and under the conditions of thermal polymerization and curing of the high-temperature electrolyte 15 to form a battery sheet 1, which is usually called a bare cell in the industry.

[0042] Take 8 battery sheets 1 and stack them together, and heat-seal the aluminum-plastic film synthesized by multilayer composite materials to form battery 2, such as image 3 , Figure 4 Shown. In this embodiment, at one-half of the total number of battery slices 1, that is, four battery slices 1 on each side are se...

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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 technical field of application 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, the energy demand and application of more and more industries, the assembly space of high-energy power battery packs is a non-traditional regular square, and the capacity of this special-shaped cavity is Space requirements are becoming more and more demanding. [0003] In the traditional polymer lithium ion power battery, the battery 10 is a regular square shape, such as figure 1 Shown. First of all, the distance between the tabs 20 of the traditional battery and each point of the battery core is unequal, resulting in uneven distribution of the ion movement process, and large current discharge cannot be performed. [0004] Secondly, the appe...

Claims

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Application Information

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