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Secondary battery

A secondary battery and battery unit technology, applied in secondary batteries, batteries, circuits, etc., can solve the problems of battery over-temperature and expansion deformation, to avoid over-expansion, accurate and timely over-temperature protection, improve accuracy and The effect of sensitivity

Active Publication Date: 2016-12-07
POLYTRONICS TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potential problems such as battery over-temperature and expansion deformation often cause irreversible dangers in a very short period of time. Therefore, it is necessary to consider increasing the sensitivity of the sensing and whether the occurrence of over-temperature can be sensed accurately, effectively and in a timely manner. while providing efficient solutions

Method used

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Embodiment Construction

[0039] In order to make the above and other technical content, features and advantages of the present invention more comprehensible, the following specifically cites relevant embodiments, together with the accompanying drawings, for a detailed description as follows.

[0040] According to an embodiment of the present invention, a secondary battery with a battery expansion detection mechanism is disclosed. Figure 1A A three-dimensional schematic diagram showing a secondary battery 10 with a battery expansion detection mechanism according to an embodiment, Figure 1B Then, a top view of the secondary battery 10 is displayed. The secondary battery 10 includes a battery cell 11 covered by a battery case 15 , and a positive electrode 12 and a negative electrode 13 protruding from the front end of the battery cell 11 . The battery unit 11 can be a rectangular structure, and the positive electrode 12 and the negative electrode 13 can also be of other types to be connected to a prote...

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Abstract

A secondary battery comprises a battery unit, at least one PTC temperature sensing device and a load switch. The battery unit is encompassed by a battery shell. The PTC temperature sensing device is disposed on a primary surface of the battery shell to effectively sense a temperature of the battery unit. The load switch connects to the battery unit and a load and determines whether the battery unit and the load switch are in electrical connection or in an open circuit state according to resistance variation of the PTC temperature sensing device. When the resistance of the PTC temperature sensing device increases to a threshold times within a specific temperature variation or time period, the load switch receives a control signal and accordingly switches to an open circuit state.

Description

technical field [0001] The present invention relates to a secondary battery, in particular to a secondary battery with an over-temperature protection function. Background technique [0002] Batteries are widely used in daily life, especially rechargeable and reusable secondary batteries are widely used in electronic products, especially in mobile devices such as mobile phones. Since lithium secondary batteries have a higher voltage than conventional nickel-cadmium batteries or conventional nickel-hydrogen batteries and the number of charge and discharge cycles can be increased for lithium secondary batteries, the demand for lithium secondary batteries has greatly increased. As far as the external shape of the battery is concerned, since the rectangular battery has a small thickness, the rectangular battery is easily applied to various products such as mobile phones, digital cameras, and the like. In terms of materials, because lithium secondary batteries have high energy de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18H02H5/04
CPCH01M10/486H01M2200/106Y02E60/10H01M10/637H01M2220/30
Inventor 朱复华王绍裘曾郡腾
Owner POLYTRONICS TECH CORP
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