Thermal decomposition material, clad material for power system and power system

Abstract

The invention relates to a thermal decomposition material, a clad material for a power system and the power system, and belongs to the technical field of energy storage devices.The thermal decomposition material is prepared from, by weight, 0-100% of an inorganic foaming agent, 0-100% of an organic foaming agent and 0-30% of auxiliaries.The inorganic foaming agent is one or more of sodium bicarbonate, sodium carbonate, ammonium bicardonate and ammonium carbonate.The organic foaming agent is azodicarbonamide and or hydrazides compounds.According to the thermal decomposition material, the inorganic foaming agent and the organic foaming agent are blended according to different proportions, specific decomposed gas can be released at the certain temperature, and the thermal decomposition material is arranged inside a box of the power system; when the local temperature of the power system is increased to a set value, the thermal decomposition material will release corresponding gas, and the temperature changing conditions inside the power system can be known only by monitoring the concentration of the gas.

Description

technical field [0001] The invention relates to a thermal decomposition material, a coating material for a power supply system and a power supply system, and belongs to the technical field of energy storage devices. Background technique [0002] According to statistics from relevant agencies, the sales volume of new energy vehicles in my country is expected to reach 220,000 to 250,000 in 2015. From January to October 2015, the cumulative production of new energy vehicles in my country was 181,225, and the cumulative sales were 171,145, a year-on-year increase of 2.7. Among them, the cumulative production and sales of pure electric vehicles were 121,099 and 113,810, a year-on-year increase of 3.3 and 3.9 times; the cumulative production and sales of plug-in hybrid vehicles were 60,126 and 57,335, a year-on-year increase of 1.9 times And 1.8 times, the electric vehicle industry has shown a good momentum of development. [0003] With the expansion of the industrial scale of elec...

AI Technical Summary

Problems solved by technology

[0005] 1) Most of the power systems used for energy vehicles use lithium-ion batteries or super capacitors that use organic electrolytes. Once the organic electrolyte leaks, it is very easy to burn;

[0006] 2) The number of components of the power system is large and difficult to control. For example, Tesla electric vehicles use more than 7,000 18650 cylindrical batteries. Most domestic electric vehicles are equipped with large-capacity lithium-ion batteries, but the number of batteries is also large, which is not easy to achieve Safety control of each battery;

[0007] 3) The voltage of the power supply system is high, generally exceeding 300V, and the safety factor is low;

[0008] 4) The insulation design of the power supply system is unreasonable, which is prone to leakage current, and an arc is formed at the leakage part to cause local heating or fire;

[0009] 5) The thermal management system of the power system cannot monitor the temperature change of each single battery well, and cannot monitor the local thermal runaway inside the power system;

[0010] 6) The collision protection design of the power system is not in place. After the battery is seriously deformed due to the collision of the whole vehicle, it is easy to cause a short circuit of the battery and cause thermal runaway;

[0011] 7) The design of the high-voltage wire harness and low-voltage wire harness of the power system is unreasonable, resulting in a short circuit of the high-voltage wire harness or low-voltage wire harness, local heating or fire;

The gas detection and alarm circuit detects the gas generated by the battery itself. The concentration of the gas is related to the reaction inside the battery and has nothing to do with the temperature of the battery, so it cannot monitor the local thermal runaway of the battery.

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