Unlock instant, AI-driven research and patent intelligence for your innovation.

a battery

A battery and cell technology, applied in the field of electrochemistry, can solve the problems of accelerating the expansion of secondary particle microcracks, reducing the service life of the cell, consuming active lithium, etc., and achieving the effects of good insulation, low cost, and good processing performance.

Active Publication Date: 2021-10-01
CONTEMPORARY AMPEREX TECH CO
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the high-Ni ternary system, high temperature will greatly accelerate the expansion of microcracks inside the secondary particles, and the formed fresh interface will have serious side reactions with the electrolyte and consume active lithium, which will greatly reduce the service life of the battery cell.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a battery
  • a battery
  • a battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The second aspect of the present invention provides the method for preparing the battery provided by the first aspect of the present invention, comprising:

[0031] filling the cavity of the package with the molded phase change heat absorbing material to provide a heat sink;

[0032] To prepare the battery, the heat absorbing part is placed between the inner wall of the shell and the electric core, and / or the heat absorbing part is placed between two electric cores.

[0033] In the preparation method provided by the present invention, the method of providing a shaped phase-change endothermic material should be known to those skilled in the art. For example, the preparation method may also include: adding each phase-change endothermic material The components are heated to a liquid state and mixed homogeneously, and cooled to form to provide a shaped phase change heat absorbing material.

[0034] The present invention adopts high-low temperature phase-change endothermic ...

Embodiment 1

[0039] Preparation of heat absorbing parts 1-3:

[0040] In the embodiment, the thickness of the battery cell is 46 mm, and different combinations of materials are used to construct the heat sink. The materials used are shown in Table 1 for details.

[0041] Mix paraffin wax A, paraffin wax B and paraffin wax C according to the weight ratio in Table 1; 2) heat the above-mentioned substances to 80°C and keep it warm for 10min to 30min; 3) stir evenly during the heat preservation process; 4) wait until the temperature is cooled to 30°C to At 35°C, take out the above-mentioned substance that is about to solidify, and place it on the surface of the lower platen of the two platens; 5) For each material combination, set three different limit heights of the platen, which are 0.5mm, 1mm and 2mm respectively , press molding, and when the temperature drops to around room temperature, take out the formed phase-change heat-absorbing material; 6) Put the prepared phase-change heat-absorbin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistivityaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of electrochemistry, in particular to a battery. The invention provides a battery, which includes a casing, an electric core located in the casing, an electrolyte, and a heat absorbing element; the heat absorbing element includes a package with an inner cavity and a phase change heat absorbing material, and the phase change The heat-changing material is located in the cavity of the package; the heat-changing material has at least a first melting temperature and a second melting temperature, and the heat-changing material melts in a gradient as temperature rises. The battery provided by the present invention can cool down the inside of the battery through the heat absorbing parts inside the battery casing without significantly affecting the performance and energy density of the battery, can be recycled, has high chemical stability, and is non-corrosive , low cost, good processing performance, recyclable, etc., and the heat absorbing part does not react with the electrolyte, and the filling material used has good insulation, and will not introduce additional safety failure modes of the battery cell.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a battery. Background technique [0002] In order to improve the energy density of lithium-ion batteries and reduce the cost of batteries, the capacity design of single batteries is getting higher and higher. However, the charging and discharging of high-capacity batteries is bound to be accompanied by high temperature. Especially at present, OEMs have put forward the demand for high-power pulse discharge for batteries. For thick batteries with large capacity, it is difficult to dissipate the heat caused by pulse or continuous discharge in time, which will further accelerate the heat accumulation inside the battery, making the battery Core core temperature rises significantly. As we all know, temperature is one of the important acceleration factors of chemical reactions. The higher the temperature, the faster the side reactions of lithium batteries. Especially in the high-Ni ter...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/654H01M10/659H01M50/121
CPCH01M10/613H01M10/654H01M10/659H01M50/10H01M50/107Y02E60/10
Inventor 梁涛葛销明姜玲燕赵丰刚
Owner CONTEMPORARY AMPEREX TECH CO