Cylindrical lithium-ion battery cap
A lithium-ion battery, cylindrical technology, applied in the direction of batteries, battery pack components, circuits, etc., can solve the problems of rising gas, PTC ring does not reach the working temperature, cylindrical lithium-ion battery failure, etc., to prevent temperature rise. high effect
Inactive Publication Date: 2018-05-29
深圳市福凯新能源技术有限公司
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Problems solved by technology
[0004] However, in reality, the heating process of cylindrical lithium-ion batteries will be very fast. The above scheme involves multi-layer conduction, and the conduction must pass through a small solder joint between the explosion-proof disk and the orifice plate, resulting in a lot of internal heat. It is difficult to quickly and accurately transfer to the PTC ring, so that the PTC ring does not reach the working temperature
Since the PTC ring in the cap of the cylindrical lithium-ion battery cannot be heated quickly and sensitively, the internal temperature of the cylindrical lithium-ion battery will still rise rapidly to generate a large amount of gas, and in severe cases, the cylindrical lithium-ion battery will fail
Method used
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[0018] Below in conjunction with specific embodiment and accompanying drawing, the present invention is further elaborated and illustrated: please refer to figure 1 , a cylindrical lithium-ion battery cap, including a top cover 10, an explosion-proof membrane 20, a hole plate 30, a sealing ring 40, a PTC plate 50 and a tab 60.
[0019] The middle part of the top cover 10 protrudes into a conical circular platform, the side wall of the circular platform is provided with a plurality of air outlet holes 11, the explosion-proof membrane 20 is provided with explosion-proof lines 21, the orifice plate 30 is provided with a plurality of first through holes 31, and the PTC plate 50 is provided with multiple holes. A second through hole 51 matching the first through hole 31. The top cover 10, the explosion-proof membrane 20, the orifice plate 30 and the PTC plate 50 are stacked sequentially from top to bottom to form a complete channel.
[0020] The sealing ring 40 includes a slot 41 ...
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The invention discloses a cylindrical lithium-ion battery cap. The cylindrical lithium-ion battery cap comprises a top cover, an explosion-proof membrane provided with explosion-proof wires, an orifice plate provided with a plurality of first through holes and a sealing ring, wherein the top cover, the explosion-proof membrane and the orifice plate are stacked sequentially from the top down, the top cover and the explosion-proof membrane are wrapped in the sealing ring, the middle part of the explosion-proof membrane is connected with the middle part of the orifice plate, the outer edge of theorifice plate is snapped into a card slot formed inside the sealing ring, the cylindrical lithium-ion battery cap further comprises a PTC plate, wherein the outer edge of the PTC plate is snapped into the card slot, the PTC plate and the orifice plate are in top touch connection, and the PTC plate is opened with a plurality of second through holes matched with the first through holes. The invention provides the cylindrical lithium-ion battery cap preventing temperature increase and more sensitive and accurate.
Description
technical field [0001] The invention relates to the technical field of lithium-ion battery accessories, in particular to a cylindrical lithium-ion battery cap. Background technique [0002] With the development of society towards clean energy, cylindrical lithium-ion batteries with the advantages of high energy ratio and long service life are popular with the public, but cylindrical lithium-ion batteries are subject to heat, acupuncture, extrusion and other factors during charging and discharging. High temperatures are generated during impacts, etc., and a large amount of gas is generated. [0003] At present, the heating problem of cylindrical lithium-ion batteries on the market is solved by a cylindrical lithium-ion battery cap. It is connected with the middle of the orifice plate by laser welding, the top cover is provided with an air outlet, the explosion-proof sheet is provided with a stamped arc explosion-proof line, the orifice plate is provided with a vent hole, the...
Claims
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IPC IPC(8): H01M2/04H01M2/34H01M50/152H01M50/581
CPCH01M2200/106H01M50/152H01M50/581Y02E60/10
Inventor 蒲海荣
Owner 深圳市福凯新能源技术有限公司