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Power battery module with disaster prevention system

A technology for power batteries and battery modules, applied to battery pack components, secondary batteries, circuits, etc., can solve problems such as easy temperature rise, temperature imbalance, internal short circuit of the battery, etc., and achieve long cycle life, light weight and durability , Realize the effect of battery disaster prevention and control

Pending Publication Date: 2017-02-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the internal short circuit of the battery and the problems of temperature imbalance and easy temperature rise under high power in the prior art, and provide a power battery and battery module with a disaster prevention system

Method used

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  • Power battery module with disaster prevention system
  • Power battery module with disaster prevention system
  • Power battery module with disaster prevention system

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The present invention fills the phase change material between the frame body and the battery unit, first stores heat through the phase change material, performs heat buffering, and then conducts heat exchange with the external environment through the ventilation channel to achieve the purpose of heat dissipation. The glass fiber that can withstand the external pressure, the shell made of carbon fiber and the phase change material act as a pressure buffer during the acupuncture test and the collision test. The phase change material is integrated with the battery cell, which can enable the power battery to achieve the optimal temperature in an extremely harsh environment, and can maintain the temperature balance of the battery cell.

[0029] Carry out following specific description for the embodiment of the present invention:

[0030] figure 1 It is an overall view of the power battery with the disaster prevention system of the present invention. figure 2 It is a plan ...

Embodiment 2

[0040]The battery acupuncture testing machine is used, product model: GT-BT-3104, and the relevant parameters of the battery acupuncture testing machine are as follows: ①High temperature-resistant steel needle of Φ2~8mm; ②The distance between the needle tip and the lower part: the plane where the battery is placed is 150mm; 150MM; ④At a speed of 10-40mm / s, penetrate from the direction perpendicular to the battery plate (the steel needle stays in the battery); ⑤The penetration force is 150-200KG; ⑥The stroke is 150mm. Experiments were carried out according to the parameters of the acupuncture testing machine mentioned above. A steel needle with a diameter of Φ2-8mm vertically penetrated a single battery with a phase change material inside at a speed of 30mm / s and a penetration force of 180KG. The test results show that the temperature of the battery rises rapidly to 150°C in the early stage of needle penetration, but drops rapidly to 30°C. The results show that this is due to th...

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Abstract

The invention discloses a power battery module with a disaster prevention system. The power battery module comprises a single battery and a battery module, wherein the single battery comprises a battery core, an outer wall of the battery core, a phase-change material, a temperature sensor, a shell and a base; the battery module comprises a frame body, the phase-change material, a ventilation duct and a head cover; the phase-change material is a mixture of graphite, a flame retardant and more than one of a lauric acid, a stearic acid or paraffin; the part between the battery core and the shell is filled with the phase-change material as a buffer body and a temperature absorber of a spike; the outer wall of the battery core is made of plastic; the battery core is fixed in a screw hole in the upper end of the frame body and the base; and the temperature sensor is fixed on the surface of the plastic to control the temperature of the battery core at any time. According to an acupuncture experiment of the power battery module, overall cooling and temperature equilibrium distribution of a power battery in a severe environment can be achieved; and light weight of the power battery module is achieved by adopting a low-density high polymer material.

Description

technical field [0001] The invention belongs to the technical field of batteries, and more specifically relates to a power battery module with a disaster prevention system. Background technique [0002] Since 2014, the sales growth of domestic new energy vehicles has entered the fast lane, and the demand for power batteries has continued to grow. However, the safety of power batteries is a key factor restricting their use in electric vehicles. Usually, the internal short circuit of the battery and the temperature imbalance under high power are easy to cause, and the temperature rise is an important reason that affects the safety of the power battery. For the internal short circuit of the battery, the acupuncture test is usually used to simulate the internal short circuit. When an external object penetrates the battery, a chemical reaction occurs due to the short circuit of the positive and negative electrodes due to the piercing of the separator, thereby causing the interna...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/617H01M10/625H01M10/6562H01M2/10H01M10/48H01M50/20
CPCH01M10/486H01M10/613H01M10/617H01M10/625H01M10/6562H01M50/20Y02E60/10
Inventor 李成飞黄智张国庆魏超
Owner GUANGDONG UNIV OF TECH
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