Power battery for electric vehicle
A battery, energy storage battery technology, applied in electric vehicles, secondary batteries, battery pack components and other directions, can solve problems such as the safety defects of electrochemical energy storage batteries
Active Publication Date: 2009-09-02
BYD CO LTD
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Problems solved by technology
[0008] In order to solve the problem of safety defects of existing electrochemical energy storage batteries, the present invention provides a new type of battery and its system suitable for use in electric vehicles
Method used
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Embodiment Construction
[0061] A lithium-ion battery is a rechargeable battery in which lithium ions can migrate between the positive and negative electrodes. Lithium ions migrate from the negative electrode to the positive electrode during discharge, and from the positive electrode to the negative electrode during charge.
[0062] figure 1 It is a cross-sectional view of an electrode sheet 100 with a multilayer structure that can be wound to form a battery cell. figure 1 The middle electrode sheet includes a three-layer functional structure, a layer of negative electrode sheet 105 , a layer of positive electrode sheet 110 , and a layer of separator 115 . The negative electrode layer 105 includes a negative electrode active material layer 106, and the negative electrode active material is coated on the front and back of the negative electrode current collector 107, and the negative electrode current collector 107 can be one or more layers of metal foil, such as copper foil. The negative electrode a...
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The invention provides an electrochemical energy-storage battery and a battery system applied to an electric vehicle. The battery comprises a battery core which comprises a positive plate, a negative plate and a diaphragm, a rectangular casing which comprises two open ends and has a size suitable for accommodating the battery core, a cover plate which is matched with the open ends, an electrode terminal which extends out of the battery through the cover plate from the interior of the electrochemical energy-storage battery, and a space ring which is safely arranged between the cover plate in the rectangular casing and the battery core and separates the cover plate from the battery core. The battery system comprises a plurality of battery packs connected in series, and each battery pack comprises a plurality of batteries provided by the invention. The safety of the monomer batteries is improved dramatically so that the electrochemical energy-storage battery can be applied to the electric vehicle safely and supplies power to the same.
Description
technical field [0001] The present invention relates to a power battery, and more particularly to a power battery and a battery pack used in automobiles, such as a power battery pack used in hybrid electric vehicles. Background technique [0002] Rechargeable lithium batteries have a wide range of applications, such as laptop batteries, mobile phone batteries, power tools, network equipment and other personal electronic devices. The power source required by these devices is a lightweight battery with medium or smaller power output requirements. However, on other devices, rechargeable lithium batteries can also provide higher power than the above-mentioned devices require, such as high-output lithium batteries can be used as industrial power supply equipment, high-power communication facilities, electric vehicles, etc. In the field of electric vehicles, the maturation of high-output lithium-ion battery systems is an obvious driver. [0003] The public is increasingly sensit...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01M10/38H01M2/02H01M2/06H01M2/20H01M2/12H01M10/613H01M10/625H01M10/6563H01M50/103H01M50/172H01M50/244H01M50/509H01M50/548
CPCY02E60/12Y02T10/7005Y02T10/7011Y02E60/122Y02E60/10Y02P70/50
Inventor 朱建华韩磊江文峰郑卫鑫潘丽英周皓胡浩蒋路霞顾红娟姚佳吴光麟王昌平石晶晶李成亮沈晞
Owner BYD CO LTD