Secondary battery and battery module

A technology for secondary batteries and electrode assemblies, which is applied in the field of secondary batteries and battery modules, can solve problems such as accidents, battery module power failure, and car flameout, and achieve the effect of improving safety and solving the problem of battery overcharge.

Active Publication Date: 2017-02-22
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in addition to overcharging, during normal use, an accidental internal short circuit may also cause internal gas production, activate the current cut-off structure, and form an open circuit between the first terminal and the electrode assembly. If the car is running at this time, The batteries in the battery module are connected in series. Because the first terminal and the second terminal are still in an insulated state, the entire battery module will be cut off, causing the car to suddenly turn off, and even lead to serious accidents.

Method used

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Examples

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no. 1 example

[0087] In the first embodiment, the flip sheet 70 is connected to the top cover sheet 10, and the first terminal 20 is electrically connected to the top cover sheet 10. Specifically, as Figure 1-3 , 4, 7, the top cover sheet 10 is provided with a first through hole, and the flip sheet 70 is attached to the top cover sheet 10 and seals the first through hole, so that the top cover sheet 10, the flip sheet 70 and the housing form a seal cavity. The first terminal 20 is electrically connected to the top cover sheet 10 . Preferably, the top cover sheet 10 may be provided with a fourth groove, and the first terminal 20 is inserted into the fourth groove; the second terminal 30 is electrically insulated from the top cover sheet 10 . The connecting member 40 is electrically insulated from the top cover sheet 10, and at least part of the connecting member 40 is opposite to the first through hole. In a normal state, the first pole piece is electrically connected to the first terminal...

no. 2 example

[0088] In the second embodiment, the flip sheet 70 is attached to the first terminal 20, such as Figure 3a , 4a As shown, a first through hole is provided on the first terminal 20, and the flip sheet 70 seals the first through hole. At this time, when the connecting member 40 is located on the side of the top cover piece 10 away from the first pole piece, the top cover piece 10 is provided with a second through hole, and the second through hole is opposite to the first through hole. In normal state, the first pole piece is electrically connected to the first terminal 20 through the flip piece 70; when the pressure in the secondary battery exceeds the reference pressure, the flip piece 70 can be flipped over to disconnect the electrical connection between the flip piece 70 and the first pole piece In the connected state, and the turned over piece 70 is electrically connected with the connecting piece 40 , so that the first terminal 20 is electrically connected through the tur...

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Abstract

The application relates to the technical field of production of energy storage devices, in particular to a secondary battery and a battery module; the secondary battery comprises a first terminal, a second terminal, a top cover plate, an electrode component, a connector and a flip plate; the battery module comprises a first electrode plate, a second electrode plate, and a partition between the first electrode plate and the second electrode plate; at least one of the first and second terminals is electrically insulated to the top plate; normally, the first electrode plate is electrically connected to the first terminal through the flip plate, and the second electrode plate is electrically connected to the first electrode plate; when inner pressure of the secondary battery is higher than a reference pressure, the flip plate can flip such that the flip plate is electrically disconnected to the first electrode plate, and the flip plate flipped is electrically connected to a connector such that the first and second terminals are electrically connected. According to the application, even if a vehicle is running, sudden flameout never occurs and vehicle safety is improved.

Description

technical field [0001] The present application relates to the technical field of energy storage device production, and in particular, to a secondary battery and a battery module. Background technique [0002] For EV hard-shell batteries, in order to solve the overcharge problem, the solution generally adopted in the industry is to cut off the main circuit of the battery before the battery cell fails to prevent the battery from continuing to charge, so as to ensure the safety of the battery. The usual structure is: a current cut-off structure is provided in the main circuit where the first terminal is electrically connected to the electrode assembly, and the second terminal is always electrically insulated from the current cut-off structure. When the battery is overcharged, internal gas is generated, and the internal air pressure increases to a certain level. When the value is set, the current cut-off structure is activated to open the circuit between the first terminal and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/30H01M2/26H01M2/34H01M2/20H01M10/04H01M50/176H01M50/50H01M50/51H01M50/531H01M50/543H01M50/55H01M50/574H01M50/578H01M50/593
CPCH01M50/50H01M50/531H01M50/51H01M50/574H01M50/55H01M50/176H01M50/593H01M2200/20Y02E60/10H01M50/578Y02P70/50H01M2220/20
Inventor 林永寿李全坤
Owner CONTEMPORARY AMPEREX TECH CO
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