Spirally wound lithium-ion battery
A lithium-ion battery, winding technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as restricting the development of square lithium-ion batteries, and achieve the effect of eliminating ineffective potential difference
Active Publication Date: 2016-02-10
BEIJING DINGNENG KAIYUAN BATTERY TECH
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Problems solved by technology
This shortcoming largely limits the development of prismatic lithium-ion batteries
Method used
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[0019] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0020] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
[0021] The invention provides a winding lithium ion battery, such as figure 1 , 2 As shown, the battery includes a casing 3 and an electric core 6 disposed in the casing, the electric core includes...
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The invention relates to a spirally wound lithium-ion battery, which comprises a shell and a battery core, wherein the battery core is arranged in the shell and comprises a wound electrode unit and a coating layer; the coating layer is arranged in a manner of contacting the shell; the coating layer comprises a second positive plate which is connected with a first positive plate in the wound electrode unit; and the second positive plate is not coated with a positive active material and is wound along a winding direction of the first positive plate in the wound electrode unit, so that the second positive plate winds the wound electrode unit for at least one cycle. According to the spirally wound lithium-ion battery, the coating layer is arranged between the wound electrode unit and the shell; and the second positive plate of the coating layer coats the wound electrode unit for at least one cycle, namely a mode of coating the negative plate with the positive plate is adopted. The second positive plate is connected with the first positive plate in the wound electrode unit and the coating layer is arranged in the manner of contacting the shell, so that the same potential is formed among the first positive plate, the second positive plate and the shell; and an invalid potential difference between the shell and the battery core is removed.
Description
technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a wound lithium ion battery. Background technique [0002] Lithium-ion power battery is a secondary battery system with the highest specific energy and is widely used in many fields. To meet the requirements of different electronic products, lithium-ion batteries can be made into cylindrical, square or button-type, and even several batteries can be connected in series and / or in parallel to form a battery pack. [0003] In recent years, square aluminum shell lithium-ion batteries have developed rapidly, mainly because square aluminum shells are easy to prepare and low in cost. Moreover, the shape of the square aluminum-case lithium-ion battery is flexible and changeable, and various products that meet the requirements can be prepared according to different capacity requirements. At the same time, because of its special square structure, the active material inside the battery...
Claims
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Login to View More IPC IPC(8): H01M10/0587H01M10/0525
CPCH01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 杨慧敏郑淑芬贾跃祥卢红红罗立卜
Owner BEIJING DINGNENG KAIYUAN BATTERY TECH