Single battery, battery module, power battery and electrical vehicle
A single battery and battery module technology, applied in the direction of secondary battery charging/discharging, battery pack components, batteries, etc., can solve software failures, battery voltage and current sampling failures, and uncontrolled long-term battery charging, etc. question
Active Publication Date: 2017-09-01
BYD CO LTD
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Problems solved by technology
However, there are also deficiencies, such as battery voltage sampling or current sampling failure, or software failure, resulting in uncontrolled battery charging for a long time, especially in the case of charging piles, when the communication between the charging pile and the battery manager fails, overcharging Uncontrollable, if the battery is overcharged to a certain extent, it will cause the battery to swell or even explode and catch fire
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[0048] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0049] In the present invention, unless otherwise stated, the used orientation words such as "up, down, left, right" are usually defined based on the direction of the corresponding drawings, and "inner and outer" refer to Inside and outside of the corresponding part contour.
[0050] Such as Figure 1 to Figure 24 As shown, the present invention provides the technical solutions of the current interruption device, the single battery, the battery module, the power battery and the electric vehicle. The current interruption device is arranged in the single battery, and multiple single batteries are connected in series or in parallel to form a battery module, and c...
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The invention discloses a single battery, a battery module, a power battery and an electrical vehicle. The single battery comprises a shell, a battery cell contained inside the shell, an electrode terminal electrically connected to the battery cell, and a cover plate for packaging the shell. The electrode terminal is arranged on the cover plate. The single battery comprises a first electrode lead-out part electrically connected to the battery cell and a second electrode lead-out part electrically connected to the electrode terminal. The cover plate is also equipped with an explosion-proof valve which is communicated with gas inside the shell. The explosion-proof valve has an overturn part for connecting the first and second electrode lead-out parts. A first nick is formed on the first electrode lead-out part and / or the second electrode lead-out part. The first nick can be disconnected under the action of air pressure in the shell so as to interrupt current through the first electrode lead-out part and / or the second electrode lead-out part. The overturn part is provided with a second nick, which can be disconnected under the action of air pressure in the shell to release the gas in the shell through the overturn part.
Description
technical field [0001] The present invention relates to the field of batteries, in particular to a single battery, a battery module including the single battery, a power battery including the battery module, and an electric vehicle including the power battery. . Background technique [0002] As an energy storage unit, batteries play an important role in all walks of life. For example, power batteries are widely used in new energy vehicles and other fields. The battery pack of the power battery can have multiple single batteries connected in series or in parallel to form a battery module. Realize the work of charging and discharging. Among them, during the charging and discharging process of the power battery, BMS (battery management system) is usually used to monitor the changes of voltage and current to calculate the state of charge. If there is a problem with the voltage sampling, it may lead to overcharging of the battery, especially for the ternary system, if the overc...
Claims
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IPC IPC(8): H01M2/34H01M10/44H01M2/12
CPCH01M10/445H01M2220/20H01M50/3425H01M50/578Y02E60/10
Inventor 胡世超蒋露霞鲁鹏朱建华朱燕
Owner BYD CO LTD