Power battery cell structure and battery pack
A technology of power electricity and pole core, applied in the direction of secondary battery, battery circuit device, secondary battery repair/maintenance, etc., can solve problems such as hidden dangers, and achieve the effect of ensuring stability and safety and solving hidden dangers.
Inactive Publication Date: 2017-02-22
湖南三迅新能源科技有限公司 +1
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Problems solved by technology
[0004] The purpose of the present invention is to provide a power cell structure and a battery pack with built-in anti-overcharge function, aiming to solve the problem of potential safety hazards in the traditional method of preventing overcharge of the pole core and connecting an external protection plate
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[0012] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0013] see Figure 1 to Figure 3 The power cell structure in the preferred embodiment of the present invention includes a pole core 1 , a housing for accommodating the pole core 1 , and a positive pole 10 and a negative pole 4 coupled with the pole core 1 and fixed on the housing. The power battery structure also includes a pressure limiting device (not shown) arranged in the casing, the pressure limiting device is sealed and fixed in the casing, and is electrically connected with the positive pole 10 and the negative pole 4, and the pressure limiting device is in ...
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The invention relates to a power battery cell structure and a battery pack. The power battery cell structure comprises a pole, a shell, a positive terminal, a negative terminal and a voltage limiting device, wherein the shell is used for accommodating the pole, the positive terminal and the negative terminal are coupled with the pole and fixed onto the shell, the voltage limiting device is fixed in the shell and electrically connected with the positive terminal and the negative terminal, and the voltage limiting device detects pole voltage and controls the pole to discharge when the pole voltage exceeds preset voltage. The power battery cell structure has the advantages that the voltage limiting protecting device is added on the basis of the original pole, the voltage limiting protecting device is arranged in the shell in a sealed manner to prevent the voltage limiting protecting device from being affected by electrolyte, and the problem that a traditional pole overcharging preventing manner has potential safety hazard is solved.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular to a power cell structure and a battery pack. Background technique [0002] One of the key technologies for the development of new energy vehicle power battery systems is power lithium-ion battery technology, especially power lithium-ion batteries with high safety, long life and high consistency. [0003] At present, one of the main obstacles hindering the development of large-capacity and high-power lithium-ion batteries is that the safety of batteries needs to be further improved. Studies have shown that overcharging is the most dangerous factor leading to unsafe behavior of Li-ion batteries. In the traditional way, to prevent overcharging of the pole core, a protective plate is generally connected to an external protection plate when assembling the battery module, so as to avoid potential safety hazards such as overcharging of individual cells in the lithium-ion battery module...
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Login to View More IPC IPC(8): H01M10/42H01M10/48
CPCH01M10/4257H01M10/48Y02E60/10
Inventor 冷陈伟玉正日施汉议梁世硕余桂霞
Owner 湖南三迅新能源科技有限公司