CN114335921A - Cylindrical battery positive end cover and cylindrical battery thereof - Google Patents
Cylindrical battery positive end cover and cylindrical battery thereof Download PDFInfo
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- CN114335921A CN114335921A CN202111680879.5A CN202111680879A CN114335921A CN 114335921 A CN114335921 A CN 114335921A CN 202111680879 A CN202111680879 A CN 202111680879A CN 114335921 A CN114335921 A CN 114335921A
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- 238000007789 sealing Methods 0.000 claims abstract description 19
- 239000012212 insulator Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000007306 turnover Effects 0.000 description 26
- 238000003466 welding Methods 0.000 description 9
- 238000001746 injection moulding Methods 0.000 description 7
- 230000007704 transition Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a cylindrical battery anode end cover and a cylindrical battery thereof, the cylindrical battery anode end cover comprises an anode top cover plate, an anode post, an anode sealing element, a temperature sensing resistor, a first insulating element, an overturning plate and a connecting plate for connecting the anode of a cylindrical battery core, the anode top cover plate is provided with an anode through hole, the anode post is penetrated and fixed in the anode through hole, the anode sealing element is surrounded on the anode post, the overturning plate comprises a fixing part for connecting the anode top cover plate and an overturning part for connecting the fixing part, the overturning part is connected with the connecting plate, when the internal air pressure of the battery exceeds a preset value, the overturning part is driven by air pressure to overturn towards the anode top cover plate to disconnect the connecting plate, the connecting plate is fixedly connected with the first insulating element and isolated by the first insulating element and the fixing part, the temperature sensing resistor is arranged between the overturning plate and the anode post and electrically connects the overturning plate and the anode post, the anode post is provided with a through hole penetrating through the anode post along the up-down direction, and the through hole communicates upset piece and external world, and its security is high, and the upset sensitivity is high.
Description
Technical Field
The invention relates to the field of energy storage instruments, in particular to a cylindrical battery anode end cover.
Background
The cylindrical battery has a high filling rate compared with the square battery, so that the cylindrical battery has the characteristic of high energy ratio, and the cylindrical battery is applied to the vehicle battery instead of the square battery by the existing battery manufacturers. In order to meet the requirement of electrically connecting the positive electrode top cover and the positive electrode of the battery core, the conventional cylindrical battery is usually connected between the positive electrode top cover and the battery core through a current collecting sheet or a current collecting disc, but when the cylindrical battery is used as a power battery, the cylindrical battery is easily subjected to violent impact, so that the connection between the current collecting sheet or the current collecting disc and the positive electrode top cover is broken or loosened, and the use of the cylindrical battery is affected. Meanwhile, when the battery is overcharged or the like, in order to cut off a circuit, an overturning sheet is arranged between a positive pole column of a positive pole end cover and a current collector sheet, and when the air pressure in the battery exceeds the preset air pressure, the overturning sheet overturns to disconnect the connection between the overturning sheet and the current collector. However, the sensitivity of the current turning sheet is not enough, and the turning sheet can be turned only by a large pressure exceeding a preset value, so that the safety protection cannot be perfectly carried out.
Disclosure of Invention
The invention aims to provide a novel cylindrical battery anode end cover and a cylindrical battery thereof.
In order to achieve the above object, a first aspect of the present invention provides an anode end cap for a cylindrical battery, which is used for sealing one end of a casing for accommodating a cylindrical battery cell, and includes an anode top cover plate, an anode post, an anode sealing member, a temperature sensing resistor, a first insulating member, a turnover plate, and a connecting plate for connecting an anode of the cylindrical battery cell, wherein the anode top cover plate is provided with an anode through hole, the anode post is inserted and fixed in the anode through hole, the anode sealing member is enclosed in the anode post, the turnover plate includes a fixing portion for connecting the anode top cover plate and a turnover portion for connecting the fixing portion, the turnover portion is connected with the connecting plate, and when the internal air pressure of the battery exceeds a preset value, the turnover portion is driven by the air pressure connecting plate to turn toward the anode top cover plate to disconnect the connection with the anode top cover plate, the connecting plate is fixedly connected with the first insulating member and isolated from the fixing portion by the first insulating member, the temperature sensing resistor is arranged between the turnover sheet and the positive post and is electrically connected with the turnover sheet and the positive post, the positive post is provided with a through hole penetrating through the positive post along the vertical direction, and the through hole is communicated with the turnover sheet and the outside.
Compared with the prior art, the temperature sensing resistor is arranged between the turnover sheet and the positive pole in the cylindrical battery positive end cover, and the resistance value of the temperature sensing resistor is increased along with the increase of the internal temperature of the battery, so that the current passing through the positive pole is reduced, and the safety protection of the positive pole is realized. If the internal temperature of the battery is reduced, the resistance value of the temperature sensing resistor is slowly reduced and restored to the original state, so that the positive pole column restores to normal current, and the battery keeps normal work. Meanwhile, when the temperature in the battery rises, electrolyte, anode material and the like can generate gas through chemical reaction, and when the air pressure rises to a certain value, the turnover sheet turns over to disconnect the electric connection between the anode post and the connecting sheet, thereby cutting off the current at the anode end to achieve the purpose of safety. In addition, the positive pole column is provided with a through hole which penetrates through the positive pole column in the vertical direction and is communicated with the turnover sheet and the outside, and the arrangement of the through hole can balance the air pressure of the turnover sheet and the outside, so that the turnover sensitivity of the turnover sheet is improved.
Preferably, the through hole comprises a first straight through hole, a taper hole and a second straight through hole which are sequentially connected, the first straight through hole is connected with the outside, the size of the taper hole is gradually reduced from the first straight through hole to the second straight through hole, and the size of the through hole is changed to form a vortex left and right, so that when the turnover piece is overturned under great pressure and then is broken, the air pressure rushing out of the shell is reduced.
Preferably, the positive post comprises a post portion provided with the through hole, and a first platform portion and a second platform portion which are arranged at two ends of the post portion, and the first platform portion is far away from the connecting sheet.
Preferably, the first platform part is provided with a second insulating part in a clamping mode.
Preferably, the positive sealing element is sleeved on the column part and abuts against the positive top cover plate and the second platform part.
Preferably, the second platform part is surrounded by a third insulating member, and the third insulating member includes a main body part disposed between the positive electrode top cover plate and the second platform part, and an extending part disposed between the fixing part and the second platform part.
Preferably, the temperature sensing resistor abuts against the top surface or the side surface of the extension portion, and when the temperature sensing resistor abuts against the top surface of the extension portion, the temperature sensing resistor can also play a role in assisting sealing.
Preferably, the positive sealing element includes a body and a protruding portion extending from one end of the body in a vertical direction, the body is sleeved on the column portion and abuts against the positive top cover plate and the second platform portion, and the protruding portion is interposed between the fixing portion and the second platform portion and abuts against the temperature sensing resistor.
Preferably, the connecting piece is clamped or adhered to the first insulating piece. Preferably, the connection piece and the top cover are clamped and fixed, the connection piece and the top cover are clamped and connected with each other, connection firmness can be improved, the situation that the connection piece is dislocated and moved to be disconnected with the top cover when the battery is subjected to violent impact can be avoided, meanwhile, the clamping and fixing of the first insulating part can also play a role in welding and positioning, and poor welding problems such as insufficient welding can be prevented. The clamping can be realized by firstly carrying out injection molding on the first insulating part to form a clamping structure, then clamping and fixing the connecting sheet and the first insulating part, or carrying out injection molding on the connecting sheet and the first insulating part together to clamp the connecting sheet in the first insulating part, wherein the preferred injection molding is better in connectivity. The adhesion fixing adopts an adhesion layer to adhere the connecting sheet on the insulating piece for fixing.
Preferably, the connecting piece includes a first connecting portion fixed to the first insulating member in a clamping manner, a second connecting portion connected to the positive electrode of the battery cell, and a transition portion connected to the first connecting portion and the second connecting portion, and the transition portion is bent to fold the second connecting portion below the first connecting portion.
Preferably, the middle part of the first connecting part is provided with a boss facing the turnover piece, the bottom of the turnover piece is welded and fixed or contacted with the boss, and in order to increase the firmness, the boss and the turnover piece are preferably fixed through spot welding.
Preferably, the first connecting portion is provided with a plurality of vent holes which are communicated up and down around the boss, the vent holes are communicated with the battery core and the turnover piece, and the vent holes can guide gas in the battery to the turnover piece, so that when the gas pressure in the battery exceeds a preset value, the turnover piece can turn over to disconnect the connection with the connecting piece.
Preferably, the middle part of the turnover part is provided with a convex hull facing the connecting sheet, and the convex hull can improve the strength so as to prevent the turnover sheet and the connecting sheet from being punctured during spot welding.
The invention provides a cylindrical battery, which comprises a cylindrical battery core, a shell for accommodating the cylindrical battery core, a positive end cover sealed at one end of the shell and a negative end cover sealed at the other end of the shell, wherein the positive end cover is the positive end cover of the cylindrical battery.
Preferably, the negative end cover comprises a negative top cover plate, a negative pole column, a negative pole sealing element, a fourth insulating element and an explosion-proof valve arranged on the negative top cover plate, the negative pole top cover plate is provided with a negative pole penetrating hole and a liquid injection hole, the negative pole column penetrates and is fixed in the negative pole penetrating hole, the negative pole sealing element is arranged around the negative pole column, and the fourth insulating element is arranged between the negative pole column and the negative pole top cover plate.
Drawings
Fig. 1 is a perspective view of one embodiment of a cylindrical battery of the present invention.
Fig. 2 is a perspective view of an embodiment of a cylindrical battery positive end cap of the present invention.
Fig. 3 is a top view of the cylindrical battery positive end cap of fig. 2 before the tabs are bent.
Fig. 4 is an exploded view of the positive end cap of the cylindrical battery of fig. 2 in one direction.
Fig. 5 is an exploded view of the positive terminal cap of the cylindrical battery of fig. 2 in another orientation.
Fig. 6 is a first variation of fig. 4.
Fig. 7 is a first variation of fig. 5.
Fig. 8 is a second variation of fig. 4.
Fig. 9 is a second variation of fig. 5.
Fig. 10 is a cross-sectional view taken along a-a of fig. 3.
Fig. 11 is a first variation of fig. 10.
Fig. 12 is a second variation of fig. 10.
Fig. 13 is a perspective view of an embodiment of a cylindrical battery negative end cap of the present invention.
Fig. 14 is a bottom view of the cylindrical battery negative end cap of fig. 13.
Fig. 15 is an exploded view of the negative end cap of the cylindrical battery of fig. 13 in one direction.
Fig. 16 is an exploded view of the negative end cap of the cylindrical battery of fig. 13 in another orientation.
Fig. 17 is a cross-sectional view in the direction B-B of fig. 14.
Description of the elements
100-cylindrical batteries; 10-a housing; 30-positive end cap; 31-positive top cover sheet; 311-positive pole through hole; 32-positive pole column; 321-a column portion; 323-a second platform section; 325 — a first platform section; 327-a through hole; 3271-first through hole; 3273-tapered hole; 3275-second through hole; 33-positive seal; 331-a body; 333-a projection; 34-temperature sensing resistor; 35-a first insulator; 36-turning over the sheet; 361-a fixed part; 363-a flipping section; 3631-convex hull; 37-connecting pieces; 371 — a first connection; 3711-boss; 3713-vent hole; 373-a transition section; 375 — a second connection; 38-a third insulator; 381-body portion; 383-an extension; 39-a second insulator; 50-a negative end cap; 51-negative top cover piece; 511-negative pole through hole; 513-explosion-proof valve hole; 515-liquid injection hole; 52-negative pole post; 521-a negative pole column portion; 523-negative pole boss; 53-negative pole riveting block; 54-plastic parts; 55-negative seal; 56-fourth insulator; 57-explosion-proof valve
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be noted that, unless otherwise expressly specified, the terms "connected," "connected," and "fixed" are used broadly and encompass, for example, a connection that may be a fixed connection, a removable connection, a direct connection, an indirect connection via intermediate media, and a connection between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The positive electrode end cap of the cylindrical battery and the cylindrical battery thereof according to the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, the cylindrical battery 100 includes a cylindrical battery cell (not shown), a casing 10 for accommodating the cylindrical battery cell, a positive terminal cover 30 sealed at one end of the casing 10, and a negative terminal cover 50 sealed at the other end of the casing 10. The positive end cap 30 and the negative end cap 50 can be fixed to the housing 10 by welding.
As shown in fig. 2 to 12, the positive end cap 30 includes a positive top cover plate 31, a positive post 32, a positive sealing member 33, a temperature sensing resistor 34, a first insulating member 35, an inverting piece 36, and a connecting piece 37 for connecting the positive electrodes of the cylindrical battery cells. The positive pole top cover plate 31 is provided with a positive pole through hole 311, the positive pole column 32 is arranged and fixed in the positive pole through hole 311, and the positive pole sealing piece 33 is arranged around the positive pole column 32. The turning piece 36 comprises a fixing part 361 connected with the positive electrode top cover piece 31 and a turning part 363 connected with the fixing part 361, the turning part 363 is connected with the connecting piece 37, when the air pressure in the battery exceeds a preset value, the turning part 363 is driven by the air pressure to turn towards the positive electrode top cover piece 31 to be disconnected with the connecting piece 37, when the temperature in the battery rises, electrolyte, positive electrode materials and the like can generate chemical reaction to generate gas, when the air pressure rises to a certain value, the turning part 363 turns to disconnect the electric connection between the positive electrode column 32 and the connecting piece 37, and therefore the current of the positive electrode end is cut off to achieve the purpose of safety. The connecting piece 37 is fixedly connected to the first insulating member 35 and separated from the first insulating member 35 by the fixing portion 361. The temperature-sensing resistor 34 is arranged between the turning piece 36 and the positive post 32 and is electrically connected with the turning piece 36 and the positive post 32, the resistance value of the temperature-sensing resistor 34 is increased along with the rise of the internal temperature of the battery, so that the current passing through the positive post 32 is reduced, the safety protection on the positive post 32 is achieved, if the internal temperature of the battery is reduced, the resistance value of the temperature-sensing resistor 34 is slowly reduced and restored to the original state, the positive post 32 is restored to the normal current, and the battery keeps working normally. The positive pole 32 is provided with a through hole 327 penetrating through the positive pole along the up-down direction, the through hole 327 is communicated with the turning sheet 36 and the outside, and the arrangement of the through hole 327 can balance the turning sheet 36 and the outside air pressure, so that the turning sensitivity of the turning sheet 36 is improved.
As shown in fig. 4 to 12, the positive post 32 includes a post portion 321 having a through hole 327, and a first platform portion 325 and a second platform portion 323 provided at two ends of the post portion 321, the first platform portion 325 is away from the connecting sheet 37, the first platform portion 325 is provided with a second insulating member 39 in a snap-fit manner, and the second insulating member 39 may be formed by injection molding.
The number of the positive post 32 may be various, and as shown in fig. 4 to 5 and 10, the positive seal 33 is fitted to the post portion 321 and abuts against the positive top cover sheet 31 and the second platform portion 323. The second platform part 323 is surrounded by the third insulating member 38, the third insulating member 38 includes a main body portion 381 disposed between the positive electrode top cover plate 31 and the second platform part 323, and an extension portion 383 disposed between the fixing portion 361 and the second platform part 323, and the temperature sensing resistor 34 abuts against a side surface of the extension portion 383.
As shown in fig. 6 to 7 and 11, the positive electrode post 32 may include a main body 331 and a protruding portion 333 extending from one end of the main body 331 in the vertical direction, the main body 331 is fitted to the post portion 321 and abuts against the positive electrode top cover sheet 31 and the second platform portion 323, and the protruding portion 333 is interposed between the fixing portion 361 and the second platform portion 323 and abuts against the temperature sensing resistor 34.
As shown in fig. 8 to 9 and 12, the positive post 32 may be configured such that the positive seal 33 is fitted to the post portion 321 and abuts against the positive top cover sheet 31 and the second platform portion 323. The second platform part 323 is surrounded by the third insulating member 38, the third insulating member 38 includes a main body portion 381 disposed between the positive electrode top cover plate 31 and the second platform part 323, and an extension portion 383 disposed between the fixing portion 361 and the second platform part 323, and the temperature sensing resistor 34 abuts against a top surface of the extension portion 383. When the temperature-sensing resistor 34 abuts against the top surface of the extension 383, the temperature-sensing resistor 34 can also serve as an auxiliary sealing function.
Continuing as shown in fig. 4-9, connection piece 37 and first insulating part 35 joint or adhesion are fixed, and preferably the joint is fixed, and both mutual joints, the firm nature of multiplicable connection can avoid the battery to take place dislocation, removal and the disconnection is connected with the top cap when receiving violent striking, and the joint of first insulating part 35 is fixed simultaneously still can play the welding position effect, can prevent welding bad problems such as rosin joint. The clamping may be performed by injection molding the first insulating member 35 to form a clamping structure, and then clamping and fixing the connecting sheet 37 and the first insulating member 35, or by injection molding the connecting sheet 37 and the first insulating member 35 together to clamp the connecting sheet 37 in the first insulating member 35, preferably, the injection molding is performed to achieve better connectivity. The adhesion fixing adopts an adhesion layer to adhere the connecting sheet on the insulating piece for fixing.
The connecting sheet 37 includes a first connecting portion 371 fixed to the first insulating member 35 in a clamping manner, a second connecting portion 375 connected to the positive electrode of the battery cell, and a transition portion 373 connecting the first connecting portion 371 and the second connecting portion 375, wherein the transition portion 373 is bent to fold the second connecting portion 375 below the first connecting portion 371. The middle part of the first connection part 371 is provided with a boss 3711 facing the turning piece 36, the bottom of the turning piece 36 is welded or contacted with the boss 3711, and in order to increase the firmness, the boss 3711 and the turning piece 36 are preferably fixed by spot welding. The first connection part 371 is provided with a plurality of vent holes 3713 penetrating up and down around the boss 3711, the vent holes 3713 communicate the battery cell with the turning sheet 36, and the vent holes 3713 can guide the gas in the battery to the turning sheet 36, so that when the gas pressure in the battery exceeds a preset value, the turning sheet 36 can turn over to disconnect the connection with the connection sheet 37. The convex hull 3631 is provided at the middle of the flip part 36 in a direction facing the connecting piece 37, and the convex hull 3631 is provided to improve strength to prevent the flip part 36 and the connecting piece 37 from being punctured when spot-welded.
As shown in fig. 10 to 12, the through hole 327 includes a first straight through hole 3271, a tapered hole 3273 and a second straight through hole 3275, which are connected in sequence, the first straight through hole 3271 is connected to the outside, the size of the tapered hole 3273 gradually decreases from the first straight through hole 3271 to the second straight through hole 3275, and the size of the through hole changes to form a vortex to control the air pressure of the housing to decrease when the turnover sheet 36 is turned over by a great pressure and then broken.
As shown in fig. 13 to 17, the negative end cap 50 includes a negative top cover 51, a negative post 52, a negative sealing member 55, a fourth insulating member 56, and an explosion-proof valve 57 disposed on the negative top cover 51, the negative top cover 51 is provided with a negative through hole 511 and a liquid injection hole 515, the negative post 52 is inserted into and fixed to the negative through hole 511, the negative sealing member 55 is disposed around the negative post 52, and the fourth insulating member 56 is disposed between the negative post 52 and the negative top cover 51. The negative pole 52 includes a negative pole body 521 passing through the negative pole passing hole 511 and a negative pole boss 523 connected to the negative pole body 52 and located below the negative pole top cover 51, and the fourth insulating member 56 is interposed between the negative pole boss 523 and the negative pole top cover 51. One end of the negative pole column 521, which is far away from the negative pole boss 523, is connected to the negative pole riveting block 53, and a plastic part 54 is arranged around the outside of the negative pole riveting block 53.
It should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that those skilled in the art will be able to modify the invention in its various equivalent forms after reading the present invention and to fall within the scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a positive end cover (30) of cylindrical battery for the one end of the casing (10) of sealed accommodation cylindrical electric core, its characterized in that includes anodal top cap piece (31), anodal post (32), anodal sealing member (33), temperature sensing resistance (34), first insulating part (35), upset piece (36) and connects anodal connection piece (37) of cylindrical electric core, anodal top cap piece (31) is equipped with anodal wear to establish hole (311), anodal post (32) wear to establish and are fixed in anodal wear to establish hole (311), anodal sealing member (33) enclose locate anodal post (32), upset piece (36) are including connecting fixed part (361) of anodal top cap piece (31) and connecting upset portion (363) of fixed part (361), upset portion (363) are connected connection piece (37) to when the inside atmospheric pressure of battery surpasses the default, upset portion (363) receive the atmospheric pressure to order about towards positive pole top cap piece (31) direction upset and disconnection with the connection of connection piece (37), connection piece (37) with first insulating part (35) fixed connection just borrow by first insulating part (35) with fixed part (361) keep apart, temperature-sensing resistor (34) are located upset piece (36) with between positive post (32) and electricity connection upset piece (36) with positive post (32), positive post (32) are equipped with through-hole (327) that run through itself along upper and lower direction, just through-hole (327) intercommunication upset piece (36) and external world.
2. The positive end cover (30) of the cylindrical battery as claimed in claim 1, wherein the through hole (327) comprises a first through hole (3271), a tapered hole (3273) and a second through hole (3275) which are connected in sequence, the first through hole (3271) is connected with the outside, and the size of the tapered hole (3273) is gradually reduced from the first through hole (3271) to the second through hole (3275).
3. The positive end cap (30) of the cylindrical battery as claimed in claim 1, wherein the positive post (32) comprises a cylindrical portion (321) provided with the through hole (327) and a first platform portion (325) and a second platform portion (323) provided at both ends of the cylindrical portion (321), the first platform portion (325) being away from the connecting piece (37).
4. The cylindrical battery positive end cap (30) of claim 3, wherein the positive seal (33) is sleeved to the cylindrical portion (321) and abuts the positive top cover sheet (31) and the second platform portion (323).
5. The cylindrical battery positive end cap (30) according to claim 3, wherein the second platform portion (323) is surrounded by a third insulating member (38), and the third insulating member (38) includes a body portion (381) provided between the positive electrode top cover sheet (31) and the second platform portion (323), and an extension portion (383) provided between the fixing portion (361) and the second platform portion (323).
6. The positive end cap (30) of the cylindrical battery as claimed in claim 5, wherein the temperature-sensitive resistor (34) abuts against the top surface or the side surface of the extension (383).
7. The cylindrical battery positive end cap (30) according to claim 3, wherein the positive seal member (33) comprises a body (331) and a protruding portion (333) extending from one end of the body (331) in a vertical direction, the body (331) is sleeved on the cylindrical portion (321) and abuts against the positive top cover sheet (31) and the second platform portion (323), and the protruding portion (333) is interposed between the fixing portion (361) and the second platform portion (323) and abuts against the temperature-sensing resistor (34).
8. The cylindrical battery positive end cap (30) of claim 1, wherein the tab (37) snaps or adhesively secures with the first insulator (35).
9. A cylindrical battery (100), comprising a cylindrical battery core, a casing (10) for accommodating the cylindrical battery core, a positive end cap (30) sealed at one end of the casing (10), and a negative end cap (50) sealed at the other end of the casing (10), wherein the positive end cap is the positive end cap (30) of the cylindrical battery according to any one of claims 1 to 8.
10. The cylindrical battery (100) according to claim 9, wherein the negative end cap (50) comprises a negative top cover plate (51), a negative pole column (52), a negative pole sealing member (55), a fourth insulating member (56) and an explosion-proof valve (57) arranged on the negative top cover plate (51), a negative pole through hole (511) and a liquid injection hole (515) are arranged on the negative top cover plate (51), the negative pole column (52) is arranged through and fixed in the negative pole through hole (511), the negative pole sealing member (55) is arranged around the negative pole column (52), and the fourth insulating member (56) is arranged between the negative pole column (52) and the negative top cover plate (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111680879.5A CN114335921A (en) | 2021-12-31 | 2021-12-31 | Cylindrical battery positive end cover and cylindrical battery thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111680879.5A CN114335921A (en) | 2021-12-31 | 2021-12-31 | Cylindrical battery positive end cover and cylindrical battery thereof |
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| CN114335921A true CN114335921A (en) | 2022-04-12 |
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| CN202111680879.5A Pending CN114335921A (en) | 2021-12-31 | 2021-12-31 | Cylindrical battery positive end cover and cylindrical battery thereof |
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