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

High-safety lithium-ion battery pack

A lithium-ion battery pack, safe technology, applied in the field of lithium-ion batteries, can solve problems such as high battery surface temperature, battery short circuit, battery pack battery burning, etc., to achieve the effect of eliminating potential safety hazards

Inactive Publication Date: 2015-12-09
庄新国
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As long as one of the batteries is thermally out of control due to overcharging or short circuit, the surface temperature of the battery is as high as 300°C or more; the high temperature causes the conventional battery fixing bracket of the battery pack to soften or burn, making the out-of-control battery contact with the surrounding batteries, causing the surrounding batteries connected in series The external short circuit of the battery, or the burning of the surrounding batteries, will cause the diaphragm of the surrounding batteries to fail, causing an internal short circuit in the battery, or burning the surrounding batteries, causing the surrounding batteries to release the flammable gas from the gasification of the electrolyte, which will cause the thermal runaway and combustion of the surrounding batteries, resulting in battery failure. Some or all of the batteries in the group burn or even explode

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
  • High-safety lithium-ion battery pack
  • High-safety lithium-ion battery pack
  • High-safety lithium-ion battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Sixteen 40Ah cylindrical 60200 lithium-nickel-manganese-cobalt oxide cathode material lithium-ion batteries were used as the battery cells 103 . Design the mold of the fixed bracket according to the diameter of the battery, the thickness of the protective layer and the size of the battery pack, add phenolic resin containing 50% glass fiber into the mold, and cure for 24 hours to obtain the required fixed bracket 201 composited by glass fiber and phenolic resin. A layer of 0.2 mm thick high silica refractory fiber cloth protective layer 102 is wrapped on the surface of each battery 103 to make a battery 103 with a protective layer on the surface. Put the battery 103 in accordance with image 3 The positive and negative signs shown are placed between the two fixed brackets 201, the battery management system 303 is installed, and the power wire 304 is used according to the image 3 Connect each battery 103, and lead out the total positive and negative power wires, connect...

Embodiment 2

[0022] Fifteen 40Ah cylindrical 60200 lithium-nickel-manganese-cobaltate cathode material lithium-ion batteries and one simulated internal short-circuit lithium-nickel-manganese-cobaltate cathode material battery with metal shavings inside were used as the battery pack battery 103 . The battery pack 301 was assembled in the same way as in Example 1, wherein the simulated internal short-circuit battery with metal shavings inside was placed on the second battery position from left to right on the third floor. Charge the battery pack at 160A with a termination voltage of 16.4V. After charging for 45 minutes, the temperature of the simulated internal short circuit rises rapidly, the explosion-proof disk opens, and finally the temperature of the case reaches 350°C. Check the battery pack after 2 hours, the battery around the battery and the fixing bracket in contact with the battery are intact.

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

No PUM Login to View More

Abstract

A high-safety lithium-ion battery pack comprises batteries provided with protective layers on the surfaces, a fixing support, a management system, a power wire and a voltage acquisition wire, wherein the batteries provided with the protective layers on the surfaces are provided with high-temperature-resisting and high-insulativity layers on the surfaces, and the fixing support is made from a high-temperature-resisting and high-insulativity material. Under dual protection of the protective layers on the surfaces of the batteries and the high-temperature-resisting battery fixing support, the potential safety hazard of the battery pack is eliminated, accordingly large-scale application of the lithium-ion battery pack and a system of the lithium-ion battery pack is facilitated, and a basis is provided for application of the poor-heat-stability and high-energy-density lithium-ion batteries in a power and energy storage system.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a multi-string lithium ion battery pack. Background technique [0002] Lithium-ion batteries have high voltage, high specific energy and environmental protection, and are widely used in portable consumer electronics products, and the battery packs composed of them are gradually used in electric vehicles and energy storage systems. [0003] Lithium-ion battery packs used as electric vehicles and energy storage systems must have high voltages, even as high as 600 volts, requiring about 200 batteries in series. Multi-string battery packs have large energy accumulation and high voltage, and face safety issues. As long as one of the batteries is thermally out of control due to overcharging or short circuit, the surface temperature of the battery is as high as 300°C or more; the high temperature causes the conventional battery fixing bracket of the battery pack to soften or burn, ...

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
IPC IPC(8): H01M2/10H01M2/02H01M10/42H01M10/48H01M10/0525H01M50/117H01M50/121H01M50/122H01M50/143H01M50/24H01M50/249
CPCH01M10/0525H01M10/42H01M10/48H01M50/116H01M50/20Y02E60/10
Inventor 庄新国
Owner 庄新国