Improved lithium battery negative electrode end sealing structure
A technology of lithium battery and negative terminal, which is applied in the field of sealing structure at the end of lithium battery, can solve the problems of complexity, inability to meet all the requirements of use, and the sealing of lithium battery negative terminal can not reach the best structural state, etc., to simplify the production process, Meet the effect of production equipment automation and simple design
Pending Publication Date: 2022-04-15
宁波久鼎新能源科技有限公司
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Problems solved by technology
Specifically, the sealing structure of the negative terminal of the lithium battery must not only meet the performance requirements of the lithium battery, but also meet the requirements of manufacturability and automation of production equipment; however, the traditional design of the negative terminal sealing structure of the lithium battery is too complicated, resulting in The above three usage requirements cannot be fully considered, which also makes the sealing of the negative terminal of the lithium battery unable to achieve the best structural state
Method used
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Embodiment Construction
[0034] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.
[0035] like Figure 1~Figure 18 As shown, 1. Shell, 11. Rolling groove, 2. Battery cell, 3. Current collector, 31. Injection hole, 32. Flange, 4. Bottom cover, 41. Mounting hole, 5. Seal ring, 6 .Collecting cover, 61. Collecting hole, 62. Inner cone surface, 63. Plane, 64. Outer cone surface, 7. Sealing plug, 71. Anti-riot hole, 72. Drainage ring groove, 73. Drainage branch groove, 8 . Seal block, 81. Small cylinder, 82. Large cylinder.
[0036] An improved lithium battery negative terminal sealing structure, such as figure 1 , Figure 4 , Figure 9 , Figure 11 As shown, it mainly involves the sealing structure of the negative terminal of the cylindrical lithium battery, which includes a metal cylindrical casing 1, a battery cell 2 arranged in the casing, and a battery installed at the end of the casing and enclosing the battery cell 2. The curr...
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The invention discloses an improved lithium battery negative electrode end sealing structure which comprises a shell, a battery cell, a current collecting piece, a sealing ring, a bottom cover and the like, and the bottom cover is designed into a blank cover or a through cover with a mounting hole; in this way, when the bottom cover is a blank cover, the bottom cover is installed at the end of the shell to drive the sealing plug on the inner end face of the bottom cover to directly seal and close the flow collecting hole in the flow collecting cover; when the bottom cover is a through cover, an outer cover which is conductive with the bottom cover is arranged outside the bottom cover, and the outer cover drives the sealing block on the inner end face to seal the current collecting hole and the mounting hole at the same time, or the outer cover directly covers the mounting hole and seals the current collecting hole at the same time. Obviously, according to the structure, only the bottom cover is improved, and the sealing plug or the sealing block, the outer cover and the like which are matched with the bottom cover are additionally arranged, namely, the current collecting holes in the current collecting cover are sealed, liquid injection of the lithium battery is not affected, the excellent using performance and the reliability of the sealing effect can be guaranteed, the design is simpler, and the cost is lower. Therefore, the production process can be simplified, and the requirement for automation of production equipment can be better met.
Description
technical field [0001] The invention relates to a sealing structure for the end of a lithium battery, in particular to an improved sealing structure for the negative terminal of the lithium battery. Background technique [0002] At present, all-tab cylindrical lithium batteries have the advantages of large capacity, fast charging, superior battery thermal runaway performance, strong internal pressure bearing capacity, and ease of automated production, thus becoming the mainstream development direction of batteries in the future. In the case, it is often necessary to seal the end of the casing to form the positive and negative terminals of the lithium battery, and the sealing structure of the negative terminal is very important for the design and production process of the lithium battery. Specifically, the sealing structure of the negative terminal of the lithium battery must not only meet the performance requirements of the lithium battery, but also meet the requirements of ...
Claims
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Login to View More IPC IPC(8): H01M50/186H01M50/188H01M50/152H01M10/058H01M10/052
CPCY02E60/10Y02P70/50
Inventor 朱效铭余敏
Owner 宁波久鼎新能源科技有限公司