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Battery cell with safety valve structure

A safety valve and cell technology, applied in structural parts, small-sized batteries/battery packs, large-sized batteries/battery packs, etc., can solve problems such as circuit breaker failure, battery explosion, secondary short circuit, etc. Stamping process, improved productivity, small welding area effect

Pending Publication Date: 2020-07-10
江苏船联新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the traditional battery basically has a safety valve at one end, but when the internal pressure of the battery increases and the diaphragm is turned over, the pole group that does not cooperate well with the battery case will also be placed in the gun barrel. The bul

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  • Battery cell with safety valve structure
  • Battery cell with safety valve structure
  • Battery cell with safety valve structure

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Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents coming within the spirit and scope of the appended claims.

[0029] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential", etc. The indicated orientation or positional relationship is based ...

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Abstract

The invention provides a battery cell with a safety valve structure, which comprises a tubular shell and a battery cell pole group arranged in the tubular shell, safety valves are arranged at the leftend and the right end of the battery cell pole group, and the safety valves can disconnect a battery cell circuit when the pressure in the tubular shell rises to a set value. The safety valves are simultaneously arranged at the two ends of the battery cell, so that pressure balance at the two ends is guaranteed, the battery cell pole group cannot be pushed to move after the internal pressure rises, the circuit breaking device works normally, and when the internal pressure reaches the circuit breaking pressure, the circuit is off to guarantee the safety of the battery, namely, the power-off devices at the two ends can be prevented from being damaged, normal circuit breaking is realized, and thermal runaway is avoided. And the safety of the battery cell is further ensured.

Description

technical field [0001] The invention relates to the field of lithium ion accumulators, in particular to an electric core with a safety valve structure. Background technique [0002] It has been nearly thirty years since Sony launched the world's first commercial lithium-ion battery in 1991. Lithium-ion batteries have achieved extremely rapid development because of their mass specific energy and weight specific energy are much higher than the previous nickel-cadmium and nickel-hydrogen batteries, low self-discharge and long cycle life, which can basically meet various needs. However, power batteries, especially vehicle power batteries, require high current charging and discharging, and are used in harsh and complex environments, resulting in frequent safety accidents and seriously hindering the development of the industry. It has become the consensus of the whole society to solve the safety problem of lithium batteries. Solving the safety problem of power batteries is essent...

Claims

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Application Information

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IPC IPC(8): H01M2/02H01M2/22H01M2/34H01M10/0525H01M10/0587H01M50/528
CPCH01M10/0587H01M10/0525H01M50/10H01M50/528H01M50/578Y02E60/10Y02P70/50
Inventor 冯福生杨国友黄进德
Owner 江苏船联新能源科技有限公司