Technology for producing high magnification power cylinder lithium ion battery
A lithium-ion battery and production process technology, applied in secondary batteries, electrochemical generators, battery pack components, etc., can solve the problem of limiting the reduction of internal resistance of high-rate power cylindrical lithium-ion batteries, affecting automation, and difficult to achieve automatic Filming and automatic winding, etc., to achieve the effect of reducing internal resistance, increasing tabs, and reducing specific surface area
Inactive Publication Date: 2015-09-09
SHENZHEN BATTERY COM BATTERY CO LTD
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Problems solved by technology
[0002] The technology used in the production of traditional high-rate power lithium-ion batteries is to spot-weld a tab at each end of the negative electrode, and then spot-weld the tab to the bottom of the steel shell. It is difficult to realize automatic film production and automatic winding, which seriously affects the automation of this important process and becomes the bottleneck of production automation
2. Severely limit the reduction of internal resistance of high-rate power cylindrical lithium-ion batteries
3. If you want to weld the lug in the middle of the negative electrode, you must make the capacity of the negative electrode far exceed the capacity of the positive electrode, so as to prevent lithium deposition at the tab, thereby limiting the increase in capacity
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] Such as figure 1 Shown, a kind of production technique of high rate power cylindrical lithium-ion battery is characterized in that: comprise the following steps:
[0021] (1) Positive electrode ingredients, coating and sheet production: The positive electrode adopts the formula: NCA: SUP: SK6: PVDF = 92.5: 1.5: 3.5: 2.5, through batching, continuous intermittent coating, leave more than two electrodes within the range of each electrode Ear position, continuous tablet compression, continuous slitting, continuous tablet production;
[0022] (2) Negative electrode ingredients, coating and tableting: Negative electrode adopts formula: C: SUP: CMC: SBR (dry weight): 94: 1.5: 1.5: 2, through batching, continuous intermittent coating, continuous tableting, continuous distribution Strip, continuous sheet production, cut more than two tabs within the range of...
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The invention discloses a technology for producing a high magnification power cylinder lithium ion battery, which comprises the following steps: 1)burdening anode, coating and flaking; 2)burdening cathode, coating and flaking; 3)reeling; 4)casing, injecting a liquid, sealing and formatting; 5)detecting; and 6)packaging and shipping. The technology has the advantages that 1)important processes of flaking and reeling of the high magnification power cylinder lithium ion battery can be easily completed by a fully-automatic machine; 2)according to steps of casing, injecting a liquid, sealing and formatting, the problems of thin tabs of a cathode tab as well as difficult wielding, welding leakage and easy shedding of a copper material can be solved, so that the cathode is fixedly connected to a steel case; 3)according to the high magnification power cylinder lithium ion battery, the specific surface area is reduced, tabs can be increased, and internal resistance can be reduced as possible; and 4)high magnification can be realized under prerequisite that high capacity is kept.
Description
technical field [0001] The invention relates to a production process of a battery, in particular to a production process of a high-rate power cylindrical lithium-ion battery. Background technique [0002] The technology used in the production of traditional high-rate power lithium-ion batteries is to spot-weld a tab at each end of the negative electrode, and then spot-weld the tab to the bottom of the steel shell. It is difficult to realize automatic film production and automatic winding in the middle, which seriously affects the automation of this important process and becomes the bottleneck of production automation. 2. Severely limit the reduction of internal resistance of high-rate power cylindrical lithium-ion batteries. 3. If you want to weld the lug in the middle of the negative electrode, you must make the capacity of the negative electrode far exceed the capacity of the positive electrode to prevent lithium precipitation at the tab, thereby limiting the increase in ...
Claims
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IPC IPC(8): H01M10/0587H01M2/26H01M50/536
CPCH01M10/0525H01M10/0587H01M50/531Y02E60/10Y02P70/50
Inventor 周泽权
Owner SHENZHEN BATTERY COM BATTERY CO LTD