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Fuse for protecting cells of battery pack of electric car

A technology of electric vehicles and single battery cells, which is applied to battery pack components, batteries, emergency protection devices, etc., can solve problems such as fire and explosion, and electric vehicle breakdowns, so as to prevent breakdowns, ensure normal driving, and avoid driving failures Effect

Active Publication Date: 2015-11-11
WUHAN BIAODI ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the battery assembly is composed of many single cells, when a single cell has a problem or a short-circuit fault occurs, it will affect the normal use of the entire battery module and battery assembly, causing the electric vehicle to break down, seriously Sometimes even cause serious safety problems such as fire and explosion

Method used

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  • Fuse for protecting cells of battery pack of electric car
  • Fuse for protecting cells of battery pack of electric car
  • Fuse for protecting cells of battery pack of electric car

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] like figure 1 and figure 2 As shown, the fuse 1 for protecting the single cell of an electric vehicle battery pack provided in Embodiment 1 includes a busbar soldering piece 11, a pair of battery connection terminals 13 arranged symmetrically on the left and right sides of the busbar welding piece 11, connecting The fuse 12 of the busbar soldering piece 11 and the battery connection terminal 13 is respectively provided with a number of longitudinally arranged sealing holes 14 on the side where the busbar welding piece 11 and the battery connecting terminal 13 are connected to the fuse 12. The hole 14 is filled with plastic 15 by injection molding, and the plastic 15 plastically seals the busbar soldering piece 11, the fuse 12 and the battery connection terminal 13, and the fuse 12 is wrapped in the plastic 15, and the busbar welding piece 11 and the battery connection terminal 13 A plurality of busbar solder joints 111 and battery solder joints 134 for welding are cor...

Embodiment 2

[0020] like image 3 and Figure 4 As shown, the electric vehicle battery cell protection fuse 1 provided by Embodiment 2 has the same structure as that of Embodiment 1, except that a pair of long fuses connected to the main body 131 on the battery connection terminal 13 The strip-shaped welding portion 132 extends toward the direction facing the busbar soldering piece 11. This structural design elongates the distance between the main body 131 of the battery connection terminal 13 and the busbar soldering piece 11, so that the connecting busbar soldering piece 11 The length of the fuse 12 connected to the battery connection terminal 13 also becomes longer. Since the fuse is extremely thin and easy to break, in order to protect the fuse, the fuse 12 connecting the bus bar soldering piece 11 and the battery connection terminal 13 is designed to be connected in an arc shape. When the vibration of the car causes the battery to vibrate, the arc fuse will not produce rigid force. ...

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Abstract

The invention discloses a fuse for protecting cells of a battery pack of an electric car, and the fuse comprises a busbar soldering lug, a pair of battery connection terminals which are located at left and right ides of the busbar soldering lug and arranged symmetrically, and a fuse wire which connects the busbar soldering lug with the battery connection terminals. Sides, which are connected with the fuse wire, of the busbar soldering lug the battery connection terminals are respectively provided with a plurality of longitudinally arranged sealing holes. Plastic cement are placed in the sealing holes in an injection manner, and enables the busbar soldering lug, the fuse wire and the battery connection terminals to be packaged into one body in a plastic packaging manner. The fuse wire is wrapped by the plastic cement. The busbar soldering lug and the battery connection terminals are respectively provided with a plurality of busbar welding points and battery welding points for welding. The fuse is disposed in a battery module of the electric car, and achieves the protection of each cell in the battery module. When overcurrent or a short-circuit fault happens to one cell in the battery module, the fuse is cut off, thereby protecting the battery module from being damaged, avoiding a driving fault, and guaranteeing the normal running of the electric car.

Description

technical field [0001] The present invention relates to the technical field of fuses, and more specifically relates to a fuse for protecting a single battery cell of an electric vehicle battery pack. Background technique [0002] Existing electric vehicles generally use lithium batteries as power. The battery assembly usually consists of thousands or even more 18650 single cells. According to the capacity of the battery assembly, N 18650 single cells are connected in parallel. The battery modules are connected in series, and then N battery modules are connected in series to form a battery assembly. [0003] At the present stage, the protective measures for the battery assembly of electric vehicles are to use fuses only on the main circuit of the battery assembly for protection. When the battery assembly fails, the fuse will be blown in time to cut off the main circuit of the battery to protect the vehicle and Personnel safety. Since the battery assembly is composed of many...

Claims

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Application Information

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IPC IPC(8): H01H85/00H01H85/153H01M2/34H01M50/583
CPCH01H85/0017H01H85/153H01M2220/20H01H2085/025H01M50/572Y02E60/10
Inventor 骆宏钧张玲朱亮田从梅陈辉潘承龙赖承超
Owner WUHAN BIAODI ELECTRONICS TECH
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