CN218242175U - Cylindrical battery and battery pack - Google Patents
Cylindrical battery and battery pack Download PDFInfo
- Publication number
- CN218242175U CN218242175U CN202221778215.2U CN202221778215U CN218242175U CN 218242175 U CN218242175 U CN 218242175U CN 202221778215 U CN202221778215 U CN 202221778215U CN 218242175 U CN218242175 U CN 218242175U
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- battery
- current collecting
- cylindrical battery
- liquid injection
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- 238000003466 welding Methods 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims description 63
- 238000002347 injection Methods 0.000 claims description 49
- 239000007924 injection Substances 0.000 claims description 49
- 238000007789 sealing Methods 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005192 partition Methods 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a cylinder battery and battery package. The cylindrical battery comprises a shell, an electric core and an end cover assembly, wherein the electric core is arranged in the shell, the end cover assembly comprises a cover plate, a current collecting plate and a pole post, the cover plate covers and seals an opening of the shell, the cover plate is provided with an avoiding through hole, the pole post penetrates through the cover plate, the current collecting plate is arranged in the containing cavity and is connected with the pole post, and the current collecting plate is back to the area avoiding the through hole and is welded with the pole ear. In the production process of the cylindrical battery, the welding head can directly penetrate through the avoiding through hole, so that the current collecting disc and the lug are welded, the cylindrical battery is high in assembling convenience, the occupied space of the current collecting disc is small, and the energy density of the battery is improved.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a cylinder battery and battery package.
Background
In the full-lug cylindrical battery, the lug of the battery cell needs to be connected with the current collecting disc, for example, the lug and the current collecting disc are mutually welded, so that the electric connection between the lug and the current collecting disc is realized. However, in the prior art, in order to facilitate welding of the tab and the current collecting disc, the current collecting disc is usually bent, and the tab and the current collecting disc are usually required to be welded and then bent in the production of the battery; this arrangement is not only disadvantageous in terms of improving the assembly efficiency of the cylindrical battery, but also the bent current collecting plate occupies a large space.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a cylindrical battery, its current collecting plate need not to buckle, and the space that current collecting plate occupied is less, and cylindrical battery's assembly convenience is high.
The utility model discloses still provide a battery package that has above-mentioned cylinder battery.
According to the utility model discloses a cylinder battery of first aspect embodiment, include: the device comprises a shell, a first fixing piece and a second fixing piece, wherein the shell is internally provided with a containing cavity, and the end part of the shell is provided with an opening communicated with the containing cavity; the battery cell is accommodated in the accommodating cavity, and the end part of the battery cell is provided with a lug; the end cover assembly, the end cover assembly includes apron, current collecting disc and utmost point post, the apron capping the opening, the apron has dodges the through-hole, utmost point post wears to establish the apron, current collecting disc set up in hold the chamber, and with utmost point post is connected, current collecting disc is back to back dodge the through-hole the region with utmost point ear welding.
According to the utility model discloses cylinder battery has following beneficial effect at least: in the prior art, when the current collecting disc is not bent in the production process of the battery, one part of the current collecting disc is arranged below the cover plate (the part is used for being connected with the pole), and the other part of the current collecting disc extends out of the edge of the cover plate; after the extending part of the current collecting disc is welded with the electrode lug of the battery core, the extending part of the current collecting disc is bent (or turned over) to the lower part of the cover plate. And the utility model discloses in, be provided with on the apron of end cover subassembly and dodge the through-hole for the soldered connection (for example laser welding device's soldered connection) of welding battery can directly pass the through-hole of dodging on the apron and extend connecting portion department, then with connecting portion back to dodging one side of through-hole and the utmost point ear welding of electricity core together, thereby realize the electric connection between end cover subassembly and the electricity core. Therefore, the welding head of the cylindrical battery of the utility model can directly pass through the cover plate to weld the pole ear, the current collecting disc does not need to be provided with a part extending out of the edge of the cover plate, and the current collecting disc does not need to be bent in the production process of the cylindrical battery, which is beneficial to improving the assembly convenience of the battery and the assembly efficiency of the battery; in addition, compare the current collecting plate of buckling among the prior art, the utility model discloses a current collecting plate of cylinder battery is equivalent to the design of individual layer, and the volume of current collecting plate or the required space that occupies is less, thereby this volume that is favorable to reducing the battery improves the energy density of battery.
According to some embodiments of the utility model, the current collecting plate with dodge the region that the through-hole is relative and be connecting portion, the current collecting plate still include with the main part that connecting portion are connected, connecting portion for the main part court is close to the direction protrusion of electric core, the main part with utmost point post is connected, connecting portion with utmost point ear welding.
According to the utility model discloses a some embodiments, connecting portion are back to one side of electricity core has seted up the spread groove, dodge the through-hole with the spread groove intercommunication.
According to some embodiments of the present invention, the connecting groove further comprises an adhesive filled in the connecting groove.
According to some embodiments of the invention, the end cap assembly further comprises a sealing member, the sealing member capping the avoiding through hole; and a stress release groove is formed in the center of one side, back to the current collecting disc, of the sealing element.
According to some embodiments of the invention, the end cap assembly further comprises a sealing member, the sealing member capping the avoiding through hole; one side of the sealing element, which is back to the current collecting disc, is provided with an annular nick.
According to some embodiments of the present invention, the current collecting plate further comprises a liquid injection part, wherein a liquid injection groove is formed on one side of the liquid injection part, which faces away from the electric core, and a plurality of liquid passing through holes are formed in a bottom wall of the liquid injection groove; the apron has annotates the liquid hole, annotate the liquid hole with annotate liquid groove intercommunication, it is a plurality of cross the liquid through-hole and follow the circumference of cylinder battery distributes, follows the axial of cylinder battery, it is in to annotate the liquid hole the projection on the diapire in notes liquid groove with cross liquid through-hole part and overlap or stagger each other.
According to some embodiments of the utility model, the current collecting disc still includes the main part, utmost point post connect in the main part, annotate liquid portion connect in the main part and for the main part is close to towards the direction protrusion of electricity core, annotate liquid portion with utmost point ear butt.
According to the utility model discloses a some embodiments, the end cover subassembly still includes insulating barrier, insulating barrier by the centre gripping in the current collecting disc with between the apron, insulating barrier has seted up the welding and has dodged the hole, the welding dodge the hole with dodge the through-hole intercommunication.
According to the utility model discloses a battery package of second aspect embodiment includes: the cylindrical battery of shell and first aspect embodiment, the cylindrical battery is provided with a plurality ofly, the cylindrical battery is installed in the shell.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a schematic diagram of a cylindrical battery according to an embodiment of the present invention;
FIG. 2 is an exploded schematic view of the cylindrical battery of FIG. 1;
fig. 3 is an exploded view of an end cap assembly of a cylindrical battery in an embodiment of the invention;
FIG. 4 is a schematic view of the current collecting disk of FIG. 3;
fig. 5 is an exploded view of another exploded state of the end cap assembly of the cylindrical battery in an embodiment of the present invention;
FIG. 6 isbase:Sub>A cross-sectional view of the cylindrical battery of FIG. 1 taken along section A-A;
FIG. 7 is an enlarged view of region B in FIG. 6;
FIG. 8 is an enlarged view of area C of FIG. 6;
fig. 9 is a schematic view (cross-sectional view) of the bottom of the case of the cylindrical battery in an embodiment of the present invention;
fig. 10 is a schematic view of a cylindrical battery case according to an embodiment of the present invention;
fig. 11 is a schematic view of a seal member with scores provided therein;
FIG. 12 is a perspective cross-sectional view of the seal of FIG. 11;
FIG. 13 is a schematic view of a seal member with stress relief grooves according to the present invention;
fig. 14 is a perspective cross-sectional view of the seal of fig. 13.
Reference numerals: 100-cylindrical battery, 101-casing, 102-end cap assembly, 103-sealing element, 104-riveting block, 105-liquid injection sealing element, 201-opening, 202-internal insulation film, 203-electric core, 204-cover plate, 205-avoiding through hole, 206-liquid injection hole, 301-welding avoiding hole, 302-liquid injection avoiding hole, 303-connecting groove, 304-liquid injection groove, 305-first through hole, 306-liquid passing through hole, 307-second through hole, 308-insulation partition plate, 309-current collecting plate, 401-second through hole, 402-connecting part, 403-liquid injection part, 501-first partition part, 502-second partition part, 503-third through hole, 504-pole, 601-central tube, 701-pole ear, 904-external convex hull, 905-bottom plate, 906-internal convex hull, 907-containing cavity, 1101-nick, 1102-stress relief groove.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The utility model provides a cylindrical battery 100, referring to fig. 1 to 3, cylindrical battery 100 includes casing 101, electric core 203 and end cover assembly 102, and end cover assembly 102 includes apron 204, utmost point post 504 and current collection dish 309, and apron 204 has been seted up and has been dodged through-hole 205 to current collection dish 309 welds with utmost point ear 701 of electric core 203.
Referring to fig. 2, the inside of the housing 101 has a receiving cavity 907, and the end of the housing 101 has an opening 201 communicating with the receiving cavity 907. The battery cell 203 is accommodated in the accommodation cavity 907, and the opening 201 provides the battery cell 203 to enter the accommodation cavity 907 during the assembly of the cylindrical battery 100. Referring to fig. 1 and 2, the cover plate 204 covers the opening 201, and the post 504 penetrates through the cover plate 204. Referring to fig. 7, the manifold 309 is disposed in the housing chamber 907, and the post 504 is connected to the manifold 309. The pole 504 and the current collecting plate 309 are both provided with conductors, and the pole 504 and the current collecting plate 309 which are connected with each other can be conducted with each other. The current collecting disc 309 is located between the pole 504 and the battery cell 203, and the pole tab 701 is welded with the current collecting disc 309, so that the pole tab 701 and the current collecting disc 309 are electrically connected. More specifically, welded to the tab 701 is the region of the collector plate 309 facing away from the through-opening 205.
In the prior art, in the production process of a battery, when a current collecting disc is not bent, one part of the current collecting disc is arranged below a cover plate (the part is used for being connected with a pole), and the other part of the current collecting disc extends out of the edge of the cover plate; after the extending part of the current collecting disc is welded with the electrode lug of the battery core, the extending part of the current collecting disc is bent (or turned over) to the lower part of the cover plate.
And the utility model discloses in, be provided with on the apron 204 of end cover subassembly 102 and dodge through-hole 205 for the soldered connection (for example laser welding device's soldered connection) of welding battery can directly pass dodge through-hole 205 on the apron 204 and extend connecting portion 402 department, then weld together the part that the through-hole 205 was dodged to the back of current collecting plate 309 with utmost point ear 701 of electric core 203, thereby realize the electric connection between end cover subassembly 102 and the electric core 203.
Therefore, in the cylindrical battery 100 of the present invention, the welding head can directly pass through the cover plate 204 to weld the tab 701, the current collecting disc 309 does not need to be provided with a portion extending out of the edge of the cover plate 204, and the current collecting disc 309 does not need to be bent during the production process of the cylindrical battery 100, which is beneficial to improving the assembly convenience of the battery and the assembly efficiency of the battery; in addition, compared with the bent current collecting plate in the prior art, the current collecting plate 309 of the cylindrical battery 100 of the present invention is equivalent to a single-layer design, and the volume of the current collecting plate 309 and the space required to be occupied are smaller, which is beneficial to reducing the volume of the battery so as to improve the energy density of the battery.
Referring to fig. 4, the current collecting plate 309 includes a main body portion 401 and a connecting portion 402, and referring to fig. 4 and 7, the connecting portion 402 is a region of the current collecting plate 309 facing the escape through hole 205, one side of the connecting portion 402 facing away from the escape through hole 205 is used for welding with the tab 701, and the main body portion 401 is connected with the pole 504. In order to facilitate welding of the connection portion 402 and the tab 701, the connection portion 402 may protrude toward the battery cell 203 with respect to the body portion 401.
The welding between the current collecting plate 309 and the tab 701 may be laser welding. In the process of welding the tab 701 and the current collecting disc 309, laser emitted by the welding head irradiates the surface of one side of the connecting part 402, which is opposite to the battery cell 203, and heats the connecting part 402; after the welding is completed, the side of the connecting portion 402 facing the battery cell 203 (or the side facing away from the relief through hole 205) is combined with the tab 701.
In some embodiments, referring to fig. 3 or 5, the end cap assembly 102 further includes an insulating spacer 308. The insulating spacer 308 is made of plastic or other insulating material, and referring to fig. 7, the insulating spacer 308 is sandwiched between the current collecting plate 309 and the cap plate 204, preventing the current collecting plate 309 and the cap plate 204 from conducting with each other. In order to avoid blocking the welding head, the insulating partition plate 308 is provided with a welding avoiding hole 301, and the welding avoiding hole 301 is communicated with the avoiding through hole 205. During the welding process, the welding head may sequentially pass through the avoidance through hole 205 and the welding avoidance hole 301.
Referring to fig. 3, the cylindrical battery 100 may further include a rivet block 504. Referring to fig. 7, a riveting block 504 is connected to one end of the pole 504 away from the current collecting plate 309, the riveting block 504 is disposed on one side of the cover plate 204 opposite to the current collecting plate 309, and the riveting block 504 and the pole 504 jointly clamp the cover plate 204, the insulating partition plate 308 and the current collecting plate 309. Referring to fig. 3 and 5, the cylindrical battery 100 further includes a first separator 501 and a second separator 502, and the first separator 501 and the second separator 502 are each made of an insulating material. Referring to fig. 7, the first spacer 501 is disposed between the riveting block 504 and the cap plate 204, and prevents the riveting block 504 from being conducted with the cap plate 204; the second spacer 502 is disposed between the post 504 and the cover plate 204, preventing the cover plate 204 from being in communication with the post 504.
Referring to fig. 5, the current collecting plate 309 is provided with a first through hole 305, the insulating partition plate 308 is provided with a second through hole 307, the cover plate 204 is provided with a third through hole 503, the first through hole 305, the second through hole 307 and the third through hole 503 are communicated with each other, and the pole 104 is sequentially provided with the first through hole 305, the second through hole 307 and the third through hole 503. Referring to fig. 5 and 7, the second spacer 502 may be sleeved outside the pole 104 and disposed in the second through hole 307 and the third through hole 503.
In some embodiments, referring to fig. 3, a side of the connecting portion 402 facing away from the battery cell 203 is opened with a connecting groove 303, and the avoiding through hole 205 is communicated with the connecting groove 303. Accordingly, the main irradiation region of the laser light emitted from the welding head is mainly irradiated on the bottom wall of the connection groove 303. The connecting groove 303 can contain a part of welding slag generated in the welding process, so that the welding slag splashed and diffused to the outside of the connecting groove 303 is reduced, and the production safety of the welding process of the current collecting disc 309 and the tab 701 is improved. In addition, in some embodiments, the cylindrical battery 100 may further include an adhesive (not shown) filled in the coupling grooves 303. Specifically, the adhesive is injected into the connecting groove 303 after the connecting portion 402 of the current collecting plate 309 and the tab 701 are welded, and the solidified adhesive can stick the welding slag and prevent the welding slag from spreading out of the connecting groove 303.
Referring to fig. 1 and 2, in order to prevent water and other foreign materials from the external environment from entering the interior of the battery, the end cap assembly 102 may further include a sealing member 103, and the sealing member 103 is coupled to the cap plate 204 and covers the relief through hole 205. The sealing member 103 and the cover plate 204 may be connected by welding, bonding, or the like, and water and foreign materials of the external environment cannot enter the inside of the cylindrical battery 100 under the blocking effect of the sealing member 103, which is advantageous to ensure the performance and safety of the cylindrical battery 100.
Referring to fig. 13 and 14, in some embodiments, if the sealing member 103 is connected to the cover plate 204 by welding, a stress relief groove 1102 may be formed in the center of a side of the sealing member 103 facing away from the collecting plate 309. During the welding process of the sealing element 103 and the cover plate 204, welding stress can be generated on the sealing element 103, and the stress relief groove 1102 in the center of the sealing element 103 reserves a space for deformation of the edge part of the sealing element 103, so that the welding stress of the sealing element 103 can be relieved.
Referring to fig. 11 and 12, in some embodiments, the side of the seal 103 facing away from the current collecting disk 309 is provided with an annular indentation 1101. It should be noted that the ring shape is not limited to the nicks being circular or elliptical, but in the present invention, the nicks can be regarded as a ring shape when they are connected end to end. In this arrangement, the seal 103 corresponds to a rupture disc, and the score 1101 is located in a region of weaker strength of the seal 103. When the gas pressure inside the battery exceeds a certain threshold, the weak region of the sealing member 103 may be ruptured, and in conjunction with fig. 7, the gas in the housing cavity 907 may flow into the space between the connection part 402 and the sealing member 103 (e.g., into the connection groove 303), and then flow out of the outside of the cylindrical battery 100 through the crack of the sealing member 103, thereby preventing the cylindrical battery 100 from exploding.
Referring to fig. 3, the lid 204 further has a pour hole 206, and the pour hole 206 allows the electrolyte to be poured into the cylindrical battery 100. Referring to fig. 3 and 4, the current collecting plate 309 includes a liquid injection portion 403, a liquid injection groove 304 is formed in a side of the liquid injection portion 403 opposite to the battery cell 203, and a plurality of liquid passing through holes 306 are formed in a bottom wall of the liquid injection groove 304. The plurality of liquid through holes 306 are distributed along the circumferential direction of the cylindrical battery 100, and the projection of the liquid injection hole 206 on the bottom wall of the liquid injection groove 304 overlaps or is staggered with the liquid through holes 306 along the axial direction of the cylindrical battery 100. For example, referring to fig. 3, in an embodiment, two liquid through holes 306 may be provided, two liquid through holes 306 are respectively provided at two ends of the bottom wall of the liquid injection groove 304, and the projection of the liquid injection hole 206 on the bottom wall of the liquid injection groove 304 falls at the center of the bottom wall of the liquid injection groove 304. Since the liquid injection hole 206 and the liquid passing through hole 306 do not completely overlap, the electrolyte flows into the liquid injection groove 304 from the liquid injection hole 206, then diffuses in the liquid injection groove 304, and then enters the housing chamber 907 through the liquid passing through hole 306. The provision of a plurality of liquid passing through holes 306 which do not completely overlap with the liquid injection hole 206 allows the electrolyte to flow into the housing chamber 907 from different positions of the manifold plate 309, which is advantageous for the electrolyte to diffuse and fully contact the cell 203.
Referring to fig. 3 or 5, if the end cap assembly includes the insulating partition 308, in order to prevent the insulating partition 308 from obstructing the injection of the electrolyte, the insulating partition 308 is provided with the injection avoiding hole 302, and both the injection hole 206 and the injection groove 304 are communicated with the injection avoiding hole 302.
Referring to fig. 2, the cylindrical battery 100 further includes a liquid injection seal member 105, and the liquid injection seal member 105 covers the liquid injection hole 206. After the electrolyte injection is completed, under the blocking action of the injection sealing member 105, water or impurities in the external environment cannot enter the inside of the battery through the injection hole 206, which is beneficial to ensuring the performance and safety of the battery. The liquid injection seal 105 may also be connected to the cover plate 204 by welding.
With reference to fig. 4 and 7, in some embodiments, the liquid injection part 403 protrudes toward the battery cell 203 relative to the main body 401, and the liquid injection part 403 abuts against the tab 701. The arrangement can increase the connection area of the tabs 701 and the current collecting disc 309, and enhance the overcurrent capacity of the cylindrical battery 100.
Referring to fig. 7, the cylindrical battery 100 further includes a central tube 601, and the pole pieces and the separator of the cell 203 are wound around the outside of the central tube 601. The cylindrical battery 100 further includes an inner insulating film 202, and the inner insulating film 202 is coated on the circumferential surface of the battery cell 203 to meet the insulation requirement between the battery cell 203 and the casing 101.
With reference to fig. 6 to 8, the battery cell 203 has tabs 701 at two ends, where the tab 701 at one end may be a positive tab 701, and the tab 701 at the other end may be a negative tab 701. The tab welded to the current collecting plate 309 is a tab located at one end of the cell 203. The tab 701 at the end remote from the end cap assembly 102 may be welded to the end of the case 101 remote from the opening 201, so that the end of the case 101 remote from the opening 201 serves as the other electrode terminal of the cylindrical battery 100.
Specifically, the housing 101 is provided as a conductor, and referring to fig. 9 and 10, the housing 101 includes a bottom plate 905, the bottom plate 905 and the opening 201 are respectively located at two ends of the housing 101, the housing 101 further includes an outer convex hull 904 and an inner convex hull 906, the outer convex hull 904 protrudes relative to the bottom plate 905 in a direction away from the accommodating cavity 907, and the inner convex hull 906 protrudes relative to the bottom plate 905 in a direction close to the accommodating cavity 907. The side of the inner convex hull 906 adjacent to the receiving cavity 907 is used for welding with a tab 701 located at an end of the cell 203 remote from the current collecting disc 309. Similar to the welding between the connection portion 402 and the tab 701, a laser welding head may be used to irradiate and heat the side of the inner convex hull 906 facing away from the receiving cavity 907 to join the inner convex hull 906 to the tab 701 near the side of the receiving cavity 907. When the cylindrical battery 100 supplies power to the electric device, the side of the convex hull 904 opposite to the accommodating cavity 907 can be used to contact the electric connection part 402, such as a connecting piece, an elastic piece, a wire, and the like.
The utility model also provides a battery package, battery package include the cylinder battery 100 in shell and the above-mentioned arbitrary embodiment, and cylinder battery 100 is provided with a plurality ofly, and cylinder battery 100 installs in the shell, and a plurality of cylinder batteries 100 establish ties each other or connect in parallel each other.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. Cylindrical battery (100), characterized in that it comprises:
a housing (101) having a receiving cavity (907) therein, an end of the housing (101) having an opening (201) communicating with the receiving cavity (907);
the battery cell (203) is accommodated in the accommodating cavity (907), and the end of the battery cell (203) is provided with a lug (701);
end cover assembly (102), end cover assembly (102) are including apron (204), current collector dish (309) and utmost point post (104), apron (204) cap seal opening (201), apron (204) have dodge through-hole (205), utmost point post (104) are worn to establish apron (204), current collector dish (309) set up in holding chamber (907), and with utmost point post (104) are connected, current collector dish (309) are to dorsad dodge the region of through-hole (205) with utmost point ear (701) welding.
2. The cylindrical battery (100) according to claim 1, wherein the area of the current collecting disc (309) opposite to the avoiding through hole (205) is a connecting portion (402), the current collecting disc (309) further comprises a main body portion (401) connected with the connecting portion (402), the connecting portion (402) protrudes towards the direction close to the battery core (203) relative to the main body portion (401), the main body portion (401) is connected with the pole post (104), and the connecting portion (402) is welded with the pole lug (701).
3. The cylindrical battery (100) according to claim 2, wherein the side of the connecting portion (402) facing away from the battery cell (203) is provided with a connecting groove (303), and the avoiding through hole (205) is communicated with the connecting groove (303).
4. The cylindrical battery (100) according to claim 3, further comprising an adhesive agent filled in the connection grooves (303).
5. The cylindrical battery (100) of claim 1, wherein the end cap assembly (102) further comprises a seal (103), the seal (103) capping the bypass through-hole (205); and a stress relief groove (1102) is formed in the center of one side, back to the current collecting disc (309), of the sealing element (103).
6. The cylindrical battery (100) of claim 1 wherein the end cap assembly (102) further comprises a seal (103), the seal (103) capping the relief through hole (205); one side of the sealing piece (103) back to the current collecting disc (309) is provided with an annular notch (1101).
7. The cylindrical battery (100) according to claim 1, wherein the current collecting plate (309) further comprises a liquid injection part (403), a liquid injection groove (304) is formed in one side of the liquid injection part (403) opposite to the battery core (203), and a plurality of liquid passing through holes (306) are formed in the bottom wall of the liquid injection groove (304);
the cover plate (204) is provided with a liquid injection hole (206), the liquid injection hole (206) is communicated with the liquid injection groove (304), the liquid passing through holes (306) are distributed along the circumferential direction of the cylindrical battery (100), and the projection of the liquid injection hole (206) on the bottom wall of the liquid injection groove (304) is partially overlapped with or staggered with the liquid passing through hole (306) along the axial direction of the cylindrical battery (100).
8. The cylindrical battery (100) according to claim 7, wherein the current collecting plate (309) further comprises a main body portion (401), the pole post (104) is connected to the main body portion (401), the liquid injection portion (403) is connected to the main body portion (401) and protrudes in a direction approaching the battery cell (203) relative to the main body portion (401), and the liquid injection portion (403) abuts against the pole tab (701).
9. The cylindrical battery (100) according to claim 1, wherein the end cap assembly (102) further comprises an insulating separator plate (308), the insulating separator plate (308) is clamped between the current collecting disc (309) and the cover plate (204), the insulating separator plate (308) is provided with a welding avoiding hole (301), and the welding avoiding hole (301) is communicated with the avoiding through hole (205).
10. Battery package, its characterized in that includes:
a housing;
the cylindrical battery (100) according to any one of claims 1 to 9, the cylindrical battery (100) being provided in plurality, the cylindrical battery (100) being mounted in the housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221778215.2U CN218242175U (en) | 2022-07-11 | 2022-07-11 | Cylindrical battery and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221778215.2U CN218242175U (en) | 2022-07-11 | 2022-07-11 | Cylindrical battery and battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053710A (en) * | 2023-01-16 | 2023-05-02 | 厦门海辰储能科技股份有限公司 | Current collecting assembly, battery monomer and battery pack |
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2022
- 2022-07-11 CN CN202221778215.2U patent/CN218242175U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053710A (en) * | 2023-01-16 | 2023-05-02 | 厦门海辰储能科技股份有限公司 | Current collecting assembly, battery monomer and battery pack |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518000 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |