Special-shaped positive and negative lead avoiding high current charging and lithium ion battery
A positive and negative electrode, high current technology, applied in the direction of secondary batteries, battery pack components, secondary battery repair/maintenance, etc., can solve the problems of influence, non-selectivity of charge and discharge current, etc.
Inactive Publication Date: 2019-08-02
GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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Problems solved by technology
[0002] figure 1 It is the conventional positive and negative tabs 1 currently in use, wherein the material of the positive tabs is metal aluminum, and the material of the negative tabs is metal nickel. The prior art is to punch a circular through hole in the center of the conventional positive and negative tabs. After the battery is composed of positive and negative pole tabs with holes, the current can only pass through the unperforated area during high-current charging and discharging, which can simultaneously limit the charging and discharging current to protect the battery. The discharge current is not selective, and the discharge current is limited at the same time. It can only be discharged through a small current, and the normal use in subsequent production will be affected.
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[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] refer to Figure 2 to Figure 5 , the present invention provides a special-shaped positive and negative pole tabs to avoid high current charging, a narrowed area and the narrowed space left on the conventional positive and negative pole tabs, the narrowed space next to the narrowed area There are several switching diodes 204 and 304 in the same direction electrically connected to the two ends that are not narrowed. When they are forward-conducting, the narrowed space can work normally, and when they are reverse-conducted, the narrowed space is in an open circuit state.
[0018] The narrowed area has a concave notch structure, and the narrowed space is the notch.
[0019] In the present invention, the switching diodes may be multiple parallel-connected in the same direction and welded in the narrowed space, or may be one, and one is used ...
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The invention discloses a special-shaped positive and negative lead avoiding high current charging and a lithium ion battery. According to the special-shaped positive and negative lead, a narrowing region is arranged on the conventional positive and negative lead, and a narrowing vacancy beside the narrowing region is electrically connected with a switching diode. Through partially narrowing the lead, a concave notch is cut on the side of the normal positive and negative lead, the switching diode is connected to the concave notch, and in the case of charging, the switching diode is reversely conducted, the switching diode does not allow current to pass through, and the current can only pass through the partial narrowing region of the lead; in the case of discharging, the switching diode isforwardly conducted, the current can pass through the switching diode and the partial narrowing region at the same time, and normal work of an aluminum shell battery is not affected; and as current in the case of charging can only pass through the partial narrowing region, the lead is narrowed partially, the battery polarization is increased, high current charging quickly reaches upper limit voltage, a constant voltage charging phase is entered until the end of full charging, and the aluminum shell battery can be prevented from being charged by high current.
Description
technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a special-shaped positive and negative tabs for avoiding high-current charging and a lithium-ion battery made thereof. Background technique [0002] figure 1 It is an existing conventional positive and negative tab 1, wherein the material of the positive tab is metal aluminum, and the material of the negative tab is metal nickel. The prior art is to punch a circular through hole in the center of the conventional positive and negative tab, and punch After the battery is composed of positive and negative tabs with holes, the current can only pass through the unperforated area during high-current charging and discharging, which can simultaneously limit the charging and discharging current to protect the battery. The discharge current is not selective, and the discharge current is limited at the same time. It can only be discharged through a small current, and the norm...
Claims
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IPC IPC(8): H01M2/26H01M10/42H01M10/0525
CPCH01M10/0525H01M10/425H01M50/531Y02E60/10
Inventor 杨万光任永刚王建彬
Owner GUANGDONG TEAMGIANT NEW ENERGY TECH CORP