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Lithium battery with fire-proof and explosion-proof device and electric vehicle using the battery

An explosion-proof device, lithium battery technology, applied in small-sized batteries/battery packs, large-sized batteries/battery packs, secondary batteries, etc., can solve problems such as fire explosion, poor heat dissipation, etc., to prevent fires and improve safety. Protection performance, the effect of reducing security risks

Active Publication Date: 2017-10-31
浙江超恒动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Lithium-ion batteries are very easy to cause fire and explosion due to problems such as short circuit and poor heat dissipation. However, the existing fire-proof and explosion-proof measures for lithium-ion batteries can only improve some of the problems to a limited extent but cannot fully solve the problem. In order to overcome this defect, the present invention provides a A lithium-ion battery fire-proof and explosion-proof device with enhanced fire-proof and explosion-proof functions aimed at the causes of lithium-ion battery fire and explosion

Method used

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  • Lithium battery with fire-proof and explosion-proof device and electric vehicle using the battery
  • Lithium battery with fire-proof and explosion-proof device and electric vehicle using the battery
  • Lithium battery with fire-proof and explosion-proof device and electric vehicle using the battery

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Embodiment 1

[0022] like figure 1 , figure 2 , image 3 , Figure 4 As shown, an electric vehicle uses a lithium-ion battery with a fire-proof and explosion-proof device. The lithium-ion battery includes a battery pack 1, a battery sheath 2 and a casing 3, and the battery pack 1 is placed in the battery sheath. In the cover 2, the battery sheath 2 is placed in the shell 3, and the gap between the battery sheath 2 and the shell 3 is filled with bicarbonate powder 11 as a fire extinguishing material, which is sodium bicarbonate in this embodiment, and the battery sheath 2 is made of ABS, and the shell 3 is made of aluminum. The shell 3 is a closed approximate cuboid, which is composed of a shell, an upper cover and a bottom cover. There is a dredging hole on the top cover of the shell 3. There is a relief valve 4 on it. The pressure relief valve 4 includes a valve body 5 and a movable valve block 6. A bonnet 7 is threadedly connected to the valve body 5. The center of the bonnet 7 is pr...

Embodiment 2

[0025] The cell sheath 2 is made of aluminum, and the shock-absorbing and flame-retardant material is flame-retardant acrylic fiber. All the other are with embodiment 1.

[0026] The lithium battery with the fireproof and explosion-proof device of the present invention can be applied to vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like.

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Abstract

The invention discloses a lithium battery having a fire-proof and explosion-proof device. The lithium battery includes a cell set, a cell protective sheath and an external shell. The cell set is arranged in the cell protective sheath and the cell protective sheath is disposed in the external shell. A clearance between the cell protective sheath and the external shell is filled with bicarbonate powder which can be subject to an endothermic reaction and generates carbon dioxide. Silicon dioxide is arranged between an internal surface of the external shell and the bicarbonate powder. The external shell is provided with a discharging hole. In the device, during a use process of the lithium battery, the bicarbonate powder, which can be subject to an endothermic reaction when being heated and generates carbon dioxide, is used as a working medium for performing heat absorption and oxygen insulation to the battery. In addition, an internal pressure of the battery can be regulated timely. By the comprehensive protective method above, accidents, such as ignition, explosion and the like, can be effectively prevented so that safe risk of the lithium battery can be greatly reduced.

Description

technical field [0001] The invention relates to a lithium-ion battery with a fire-proof and explosion-proof device and its application products, more specifically, it relates to a lithium-ion battery with a fire-proof and explosion-proof device and an electric vehicle using the battery. Background technique [0002] Due to the non-renewable energy crisis and serious environmental pollution, the world has accelerated the development of green and high-performance lithium-ion batteries. The application field of lithium-ion batteries extends from the field of digital products to the fields of transportation power, energy storage, aerospace, and communication backup power. People The demand for lithium-ion batteries has also grown from hundreds of mAh to hundreds or even thousands of amp-hours. With the increase in capacity, safety issues will become more difficult to control. Therefore, the safety of high-capacity lithium-ion batteries is now The subject of research by many comp...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M2/12B60K1/04
CPCB60K1/04H01M10/0525H01M50/10H01M50/333H01M50/383Y02E60/10
Inventor 孙延先任宁李爱明杨晓旭张海飞
Owner 浙江超恒动力科技有限公司
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