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Single battery, power battery pack and vehicle
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A technology of power battery packs and single batteries, which is applied in the field of vehicles, can solve the problems of inconvenient disassembly, inability to carry out secondary welding of poles, difficulty in repairing and high cost, so as to reduce internal resistance, shorten current conduction path, and improve overvoltage. The effect of flow ability
Active Publication Date: 2022-01-07
BYD CO LTD
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Summary
Abstract
Description
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Application Information
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Problems solved by technology
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Problems solved by technology
For example, the welding part of the battery pole, since most of the current vehicle batteries only use a positive or negative lead-out part, once the battery is repaired, considering the safety of the electrical connection and the overcurrent capability, the used pole cannot be re-welded
In addition, after the batteries are bonded, due to the inconvenience of disassembly, when one of the batteries fails, it is difficult and costly to repair
Method used
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Embodiment 1
[0091] The single battery 100 includes a casing 1 and a pole core 15 . Both ends of the casing 1 have end plates, and each end plate is provided with two electrode terminals, and the polarity of the two electrode terminals on the same end plate is the same, and the electrode terminals pass through the end plates; the pole core 15 is accommodated in the shell Inside the body 1 , and both ends of the pole core 15 are provided with tabs, and one end of the electrode terminal protruding into the inner side of the end plate is connected to the corresponding tab.
[0092] Wherein, L2 / L3=0.93, L1=58mm, L2=65.1mm, L3=70mm, and the single battery is marked as S1.
Embodiment 2
[0094] The single battery 100 includes a casing 1 and a pole core 15 . Both ends of the casing 1 have end plates, and each end plate is provided with two electrode terminals, and the polarity of the two electrode terminals on the same end plate is the same, and the electrode terminals pass through the end plates; the pole core 15 is accommodated in the shell Inside the body 1 , and both ends of the pole core 15 are provided with tabs, and one end of the electrode terminal protruding into the inner side of the end plate is connected to the corresponding tab.
[0095] Wherein, L2 / L3=0.95, L1=100mm, L2=123.5mm, L3=130mm, and the single battery is marked as S2.
Embodiment 3
[0097] The single battery 100 includes a casing 1 and a pole core 15 . Both ends of the casing 1 have end plates, and each end plate is provided with two electrode terminals, and the polarity of the two electrode terminals on the same end plate is the same, and the electrode terminals pass through the end plates; the pole core 15 is accommodated in the shell Inside the body 1 , and both ends of the pole core 15 are provided with tabs, and one end of the electrode terminal protruding into the inner side of the end plate is connected to the corresponding tab.
[0098] Wherein, L2 / L3=0.97, L1=187mm, L2=194mm, L3=200mm, and the single battery is marked as S3.
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Abstract
The application discloses a single battery, a power battery pack, and a vehicle. The single battery includes: a housing and a pole core located in the housing; the housing has multiple surfaces, at least two of which are There are electrode terminals electrically connected to the pole core and extending out of the housing for drawing current on the surface, and there are at least two electrode terminals on each surface; The tab, the electrode terminal is electrically connected to the pole core through the tab, the width of the tab is L2, the length of the pole core in the width direction of the tab is L3, at least one of the The relationship between the tab widths L2 and L3 satisfies 0.9≦L2 / L3≦0.99. In the single battery of the present application, when the four electrode terminals are all electrically connected to the pole core, the current conduction path of the single battery can be shortened, the internal resistance of the single battery can be reduced, and the overcurrent capability can be improved. When the two of them are connected, the other two electrode terminals can be used as spares, which is beneficial to the subsequent repair of the single battery.
Description
technical field [0001] The present application relates to the technical field of vehicle manufacturing, and in particular to a single battery, a power battery pack with the single battery, and a vehicle with the power battery pack. Background technique [0002] In recent years, with the vigorous development of new energy vehicles, the performance requirements of on-board batteries have also increased. Among them, the Ministry of Industry and Information Technology, the National Development and Reform Commission, and the Ministry of Science and Technology jointly issued the "Medium and Long-term Development Plan for the Automobile Industry" to clarify the goal of power batteries in my country. By 2020, the specific energy of lithium-ion power batteries will be greater than 300Wh / kg; Energy strives to reach 260Wh / kg; cost is less than 1 yuan / Wh; operating environment ranges from minus 30°C to 55°C; has 3C charging capability, and strives to achieve 350Wh / kg for a single battery...
Claims
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Application Information
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