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secondary battery

A technology of secondary batteries and resistors, which is applied to battery components, circuits, electrical components, etc., can solve the problems of reducing the safety of secondary batteries and high consistency requirements, so as to reduce the risk of fire or explosion and improve safety Sexuality, the effect of reducing the probability of accidents

Active Publication Date: 2022-04-01
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above two aspects lead to a contradiction in the selection of the resistance value of the resistor. On the one hand, the resistance is required to be larger to reduce the short-circuit circuit; on the other hand, the resistance is required to be small so that the short-circuit current can blow the fuse part.
[0006] In the related art, it is also possible to solve the above-mentioned contradiction by setting two contact pieces in the secondary battery, but this requires high consistency in the actions of the two contact pieces, otherwise, if one of the two contact pieces cannot action, it will reduce the safety of the secondary battery

Method used

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Embodiment Construction

[0085] The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings. The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings. The terms "front", "rear", "left", "right", "upper" and "lower" mentioned in the text refer to the placed state of the secondary battery in the drawings.

[0086] Such as Figure 1-8 As shown, the embodiment of the present application provides a secondary battery, the secondary battery includes a first terminal 11 and a second terminal 21, the first terminal 11 and the second terminal 21 can be connected to an external circuit to form a current loop, the secondary battery The battery is used as a power source in the external circuit to output electric energy to the outside world.

[0087] Wherein, the first terminal 11 can be used as a positive terminal, and correspondingly, the se...

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Abstract

A secondary battery, comprising: an electrode assembly (31), a first terminal (11), a second terminal (21) and a top cover sheet (41), the electrode assembly (31) including a first pole piece, The second pole piece and the separator arranged between the first pole piece and the second pole piece, the first pole piece is electrically connected to the first terminal (11), the second pole piece is electrically connected to the second terminal (21), The secondary battery further includes: a resistance member (24), a contact piece (12) attached to the first terminal (11), a conductive piece (22) electrically connected to the second terminal (21), a top cover piece (41) The resistance member (24) is always electrically connected to the first terminal (11), and is insulated from the second terminal (21) and the conductive sheet (22); when the internal pressure of the secondary battery exceeds the reference pressure, the contact sheet (12) Action under the action of air pressure and contact with the conductive sheet (22) to form a The electrical connection path of the pole piece, this solution realizes two aspects of protection for the secondary battery, and improves the safety of the secondary battery.

Description

technical field [0001] The present application relates to the technical field of energy storage devices, in particular to a secondary battery. Background technique [0002] Electric vehicles and energy storage power stations generally need to use secondary batteries with large capacity as power sources. In addition to high capacity, these secondary batteries should also have good safety in order to meet the use standards and meet people's needs. [0003] On the one hand, when the secondary battery is passed by a conductor from the outside, there is a short circuit between the positive electrode and the negative electrode inside the cell. At this time, a resistor is usually set between the top cover and the pole, and the resistance of the resistor The resistance value is usually large to reduce the short-circuit current passing through the positive and negative plates, so as not to cause the cell to run out of control. [0004] On the other hand, when the secondary battery ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/572H01M50/578H01M50/583H01M50/581
CPCY02E60/10H01M50/583
Inventor 蔡如来杨伟王鹏李想
Owner CONTEMPORARY AMPEREX TECH CO
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