CN115425343A - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
- Publication number
- CN115425343A CN115425343A CN202211093985.8A CN202211093985A CN115425343A CN 115425343 A CN115425343 A CN 115425343A CN 202211093985 A CN202211093985 A CN 202211093985A CN 115425343 A CN115425343 A CN 115425343A
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- plate
- groove
- clamping plate
- battery
- pole
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Links
- 238000003466 welding Methods 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims description 22
- 230000009471 action Effects 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 6
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000012634 fragment Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention belongs to the technical field of batteries, and discloses a battery which comprises a shell, a pole core assembly and a cover plate assembly, wherein the pole core assembly comprises a pole core body and a pole lug arranged at the end part of the pole core body, the pole core body is arranged in the shell, the cover plate assembly comprises a top cover support and a connecting barrel penetrating through the top cover support, the top cover support is blocked at an opening of the shell, the connecting barrel is provided with a groove, the opening of the groove is deviated from the opening of the shell, and the bottom of the groove is connected with the pole lug through laser welding, so that the pole lug and the connecting barrel are subjected to laser welding at the outer side of the shell, and the influence of smoke dust, residues and other particles on the interior of the battery caused by welding in the interior of the battery shell is avoided.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery.
Background
The lithium ion battery generally includes a housing, a pole piece, a cover plate, and other components, wherein the pole piece is disposed in the housing, and the cover plate is sealed at an opening of the housing.
Among the prior art, the utmost point ear of stretching out by utmost point core both ends respectively with apron in the casing contact to through laser welding's mode fixed connection in the casing, but at the laser welding in-process, often can produce particulate matters such as smoke and dust and residue, the particulate matter can lead to the fact the influence to battery inside, makes the short circuit rate and the low pressure ratio of battery increase, and then has reduced the safety in utilization and the use reliability of battery.
Therefore, it is desirable to provide a battery to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a battery, which can realize laser welding of a lug and a connecting barrel on the outer side of a battery shell, and avoids the influence of particles such as smoke dust, residues and the like on the inside of the battery caused by welding in the battery shell.
In order to achieve the purpose, the invention adopts the following technical scheme:
a battery, comprising:
a housing provided with an opening;
the pole core assembly comprises a pole core body and a pole lug, the pole core body is arranged in the shell, and the pole lug is arranged at the end part of the pole core body;
the cover plate assembly comprises a top cover support and a connecting barrel, the top cover support is plugged in the opening, the connecting barrel is arranged on the top cover support in a penetrating mode, a groove is formed in the connecting barrel, the notch of the groove deviates from the opening, and the groove bottom of the groove is connected with the lug through laser welding.
Optionally, the pole core assembly further comprises a first clamping plate and a second clamping plate, the pole lug is clamped between the first clamping plate and the second clamping plate, a supporting portion is arranged at the top of the first clamping plate, a folded edge is arranged at the end portion of the pole lug and arranged on the supporting portion, and the supporting portion can support laser welding of the folded edge and the groove bottom of the groove.
Optionally, the pole piece assembly further includes a cushion pad, the cushion pad is clamped between the folded edge and the support portion, and the cushion pad is an elastic member.
Optionally, the tab is provided with a first fixing hole, one of the first clamping plate and the second clamping plate is provided with a second fixing hole, and the other one of the first clamping plate and the second clamping plate is provided with a fixing column penetrating through the first fixing hole and the second fixing hole.
Optionally, be equipped with the shell fragment on the top cap support, the shell fragment can warp under the effect of external force, is equipped with the fixture block on the shell fragment, and first splint and/or second splint are equipped with the draw-in groove, and the fixture block joint is in the draw-in groove under the elastic action of shell fragment.
Optionally, the cover plate assembly further comprises an output plate, the output plate is fixed on the top cover support, the output plate is provided with a stepped hole, the stepped hole is provided with a first step tread, a connecting portion is arranged on the outer wall of the connecting barrel, the connecting barrel penetrates through the stepped hole, and the connecting portion is fixedly connected with the first step tread.
Optionally, the edge of the groove is provided with a flange, the flange extends towards the axis direction deviating from the groove, and the flange forms the connecting part.
Optionally, the cover plate assembly further comprises a sealing plate, the stepped hole further comprises a second step tread, the sealing plate is fixed on the second step tread, and the sealing plate can seal the notch of the groove.
Optionally, the connecting barrel is further provided with a liquid seepage hole, the liquid seepage hole is communicated with the inside of the shell, and the electrolyte can enter the inside of the shell through the liquid seepage hole.
Optionally, the weep hole is located at the junction of the floor of the groove and the sidewall of the groove.
Has the advantages that:
according to the battery provided by the invention, the top cover support is sealed at the opening of the battery shell, the connecting barrel is arranged on the top cover support in a penetrating manner, the connecting barrel is provided with the groove, and the notch of the groove is deviated from the opening of the battery shell, so that the bottom of the groove is positioned at the outer side of the shell, and the bottom of the groove is connected with the lug through laser welding, therefore, the effect of performing laser welding on the lug and the connecting barrel at the outer side of the battery shell is achieved, the influence of particles such as smoke dust and residues caused by welding in the battery shell on the interior of the battery is avoided, the short circuit rate and the low voltage ratio of the battery are further reduced, and the use safety and the use reliability of the battery are effectively improved.
Drawings
Fig. 1 is a schematic structural view of a battery provided in the present embodiment;
fig. 2 is an exploded structure diagram of the battery provided in the present embodiment;
fig. 3 is a schematic structural diagram of a pole core assembly provided in this embodiment;
fig. 4 is a structural schematic diagram of a pole core body and a pole lug provided in the embodiment;
fig. 5 is an exploded view of the cover plate assembly provided in the present embodiment;
fig. 6 is a schematic structural diagram of the connection barrel provided in the present embodiment;
fig. 7 is a schematic structural diagram of an output board provided in the present embodiment;
FIG. 8 is a schematic view of the assembled structure of the connecting barrel and the output plate provided in this embodiment;
fig. 9 is a schematic structural diagram of the cover plate assembly provided in this embodiment;
fig. 10 is a schematic view showing an exploded structure of a rivet and a second insulating sealing ring provided in the present embodiment;
fig. 11 is a schematic structural view of a first clamping plate and a second clamping plate provided in the present embodiment;
fig. 12 is a schematic view of an exploded structure of a cover plate assembly according to another embodiment.
In the figure:
100. a housing; 110. an opening; 200. a pole piece assembly; 210. a pole piece body; 220. a tab; 221. folding edges; 222. a first fixing hole; 230. a first splint; 231. a support portion; 232. fixing a column; 240. a second splint; 241. a second fixing hole; 250. a card slot; 260. a cushion pad; 300. a cover plate assembly; 310. a top cover bracket; 311. a top cover plate; 312. an insulating frame; 3121. a spring plate; 3122. lightening holes; 320. a connecting barrel; 321. a groove; 322. a connecting portion; 323. a weep hole; 330. an output plate; 331. a first step tread; 332. a second step tread; 340. sealing the sheet; 350. an insulating pad; 360. a first insulating seal ring; 371. riveting; 372. and a second insulating seal ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment provides a battery, can realize carrying out laser welding to utmost point ear and connection bucket outside battery case.
Specifically, as shown in fig. 1 to 5, the battery includes a housing 100, a pole core assembly 200 and a cover plate assembly 300, the housing 100 is provided with an opening 110, the pole core assembly 200 includes a pole core body 210 and a pole tab 220, the pole core body 210 is disposed in the housing 100, the pole tab 220 is disposed at an end of the pole core body 210, the cover plate assembly 300 includes a top cover bracket 310 and a connection barrel 320, the top cover bracket 310 is sealed at the opening 110, the connection barrel 320 is inserted into the top cover bracket 310, the connection barrel 320 is provided with a groove 321, a notch of the groove 321 is disposed away from the opening 110, and a groove bottom of the groove 321 is connected with the pole tab 220 by laser welding.
The top cap support 310 shutoff of this battery is in battery case 100's opening 110, wear to be equipped with on the top cap support 310 and connect bucket 320, it is equipped with recess 321 to connect bucket 320, the notch of recess 321 deviates from battery case 100's opening 110, consequently, the tank bottom of recess 321 is located the outside of casing 100, pass through laser welding with the tank bottom of recess 321 and utmost point ear 220 and be connected, the effect of carrying out laser welding to utmost point ear 220 and connection bucket 320 in the battery case 100 outside has been reached from this, the influence of particulate matters such as smoke and dust and residue that lead to owing to at battery case 100 internal weld to the battery inside causing has been removed from, and then the short circuit rate and the low pressure ratio of battery have been reduced, the safety in utilization and the operational reliability of battery have effectively been improved.
Optionally, the top cover bracket 310 is welded to the edge of the opening 110 of the casing 100 in a sealing manner, so as to seal the opening 110 of the casing 100 by the top cover bracket 310.
Optionally, as shown in fig. 1 to 6, the connecting barrel 320 is further provided with a liquid permeating hole 323, the liquid permeating hole 323 is communicated with the inside of the casing 100, and the electrolyte can enter the inside of the casing 100 through the liquid permeating hole 323, so that a liquid injecting hole formed in the top cover bracket 310 is omitted, and the overall structure of the top cover bracket 310 is simplified.
Preferably, as shown in fig. 1 to 6, the weep hole 323 is located at a connection position between the groove bottom of the groove 321 and the sidewall of the groove 321, so as to enlarge the groove bottom area of the groove 321 as much as possible, and further enlarge the welding area between the groove bottom of the groove 321 and the tab 220, thereby achieving the effect of improving the welding stability and reliability between the connection barrel 320 and the tab 220.
Optionally, as shown in fig. 1 to 8, the cover plate assembly 300 further includes an output plate 330, the output plate 330 is fixed on the top cover bracket 310, the output plate 330 is provided with a stepped hole, the stepped hole has a first stepped tread 331, the outer wall of the connecting barrel 320 is provided with a connecting portion 322, the connecting barrel 320 is inserted into the stepped hole, and the connecting portion 322 is welded and fixed to the first stepped tread 331, thereby realizing the connection between the connecting barrel 320 and the top cover bracket 310.
Further, as shown in fig. 1 to 8, the edge of the groove 321 is provided with a flange, the flange extends towards the axial direction away from the groove 321, the flange forms a connecting portion 322, a portion of the connecting barrel 320 extending out of the output plate 330 is omitted, and the overall length of the battery is reduced.
Optionally, as shown in fig. 1 to fig. 9, the cover plate assembly 300 further includes a sealing sheet 340, the stepped hole further has a second step tread 332, the sealing sheet 340 is welded and fixed on the second step tread 332, the sealing sheet 340 can block the notch of the groove 321, the opening 110 of the battery case 100 is blocked by the top cover bracket 310, and the notch of the groove 321 on the connecting barrel 320 is blocked by the sealing sheet 340, so that the battery forms a relatively closed whole, and the consistency of the whole structure of the battery is improved.
Alternatively, as shown in fig. 1 to 9, the top cover bracket 310 includes a top cover plate 311 and an insulating frame 312, the top cover plate 311 is made of a high-quality aluminum alloy material, the insulating frame 312 is made of an insulating material such as rubber, the top cover plate 311 and the insulating frame 312 are integrally injection-molded to form the top cover bracket 310, and the insulating frame 312 is provided with weight-reducing holes 3122 to reduce the weight of the cover plate assembly 300, thereby reducing the overall weight of the battery to improve the energy density of the battery. Alternatively, the output plate 330 is made of a high-quality aluminum alloy material.
Optionally, as shown in fig. 1 to 10, the cover plate assembly 300 further includes an insulating gasket 350, a rivet 371, and a first insulating sealing ring 360, the insulating frame 312, the top cover plate 311, the insulating gasket 350, and the output plate 330 are sequentially disposed, and the insulating frame 312 is disposed close to the battery case 100, the connecting barrel 320 sequentially penetrates through the output plate 330, the insulating gasket 350, the top cover plate 311, and the insulating frame 312, and the connecting barrel 320 and the output plate 330, the insulating gasket 350, the top cover plate 311, and the insulating frame 312 are sealed in an insulating manner by the first insulating sealing ring 360, the rivet 371 sequentially penetrates through the insulating frame 312, the top cover plate 311, the insulating gasket 350, and the output plate 330 to fix the four, and the rivet 371 and the insulating frame 312 are sealed by the second insulating sealing ring 372. In this embodiment, the number of the rivets 371 and the number of the second insulating sealing rings 372 are four and correspond to one another, and in other embodiments, the number of the rivets 371 and the number of the second insulating sealing rings 372 may be other, which is determined according to the sizes of the insulating frame 312, the top cover plate 311, the insulating pad 350 and the output plate 330.
Optionally, as shown in fig. 1 to 11, the pole core assembly 200 further includes a first clamping plate 230 and a second clamping plate 240, the tab 220 is clamped between the first clamping plate 230 and the second clamping plate 240 to fix the tab 220, a supporting portion 231 is disposed at the top of the first clamping plate 230, a folded edge 221 is disposed at an end of the tab 220, the folded edge 221 is disposed on the supporting portion 231, and when the groove bottom of the groove 321 of the connection barrel 320 and the folded edge 221 of the tab 220 are laser welded, the supporting portion 231 can support the groove bottom of the groove 321 and the folded edge 221 of the tab 220 well, thereby improving the welding strength of the groove bottom and the folded edge 221.
Preferably, as shown in fig. 1 to 11, the pole core assembly 200 further includes a buffer pad 260, the buffer pad 260 is clamped between the flange 221 and the support portion 231, the buffer pad 260 is an elastic member, and exemplarily, the buffer pad 260 may be a rubber pad, a silica gel pad, a rubber pad, or the like, and since the buffer pad 260 clamped between the flange 221 and the support portion 231 has a certain elasticity, when the groove bottom of the groove 321 of the connection barrel 320 and the flange 221 of the tab 220 are laser welded, the stress position of the buffer pad 260 will be deformed to a certain extent, and then the buffer pad 260 generates a rebound force on the flange 221 in the deformation region, which enables the flange 221 to be in good contact with the groove bottom, thereby improving the welding reliability between the flange 221 and the groove bottom.
Further, as shown in fig. 1 to 11, the supporting portion 231 is a buffer groove opened at the top of the first clamping plate 230, and the buffer pad 260 is disposed at the bottom of the buffer groove, so as to achieve the fixing and positioning effects on the buffer pad 260. Of course, in other embodiments, the buffer groove may be omitted, and the top of the first clamping plate 230 may be directly used as the support part 231.
Optionally, as shown in fig. 1 to 11, the tab 220 is provided with a first fixing hole 222, the second clamping plate 240 is provided with a second fixing hole 241, the first clamping plate 230 is provided with a fixing post 232, and the fixing post 232 penetrates through the first fixing hole 222 and the second fixing hole 241, so as to achieve a fixing effect of the first clamping plate 230 and the second clamping plate 240. It is understood that in other embodiments, the second fixing hole 241 may be opened on the first clamping plate 230, and the fixing post 232 may be opened on the second clamping plate 240, depending on actual production and usage requirements. Optionally, in this embodiment, the number of the first fixing holes 222, the second fixing holes 241 and the fixing posts 232 is four and corresponds to one another, and it is understood that in other embodiments, other numbers of the first fixing holes 222, the second fixing holes 241 and the fixing posts 232 may be selected, depending on the size of the tab 220, the first clamping plate 230 and the second clamping plate 240.
Optionally, as shown in fig. 1 to 11, an elastic sheet 3121 is disposed on the insulating frame 312, the elastic sheet 3121 can deform under the action of an external force, a clamping block is disposed on the elastic sheet 3121, clamping grooves 250 are disposed on the first clamping plate 230 and the second clamping plate 240, and the clamping block is clamped in the clamping groove 250 under the elastic action of the elastic sheet 3121, so as to connect the cover plate assembly 300 and the pole core assembly 200. It is understood that in other embodiments, a slot 250 may be provided on one of the first clamping plate 230 and the second clamping plate 240, and the connection of the cover plate assembly 300 and the pole piece assembly 200 may be realized as well. In the technical solution provided in this embodiment, the first clamping plate 230 and the second clamping plate 240 are both provided with the clamping groove 250, so that the connection between the cover plate assembly 300 and the pole core assembly 200 is stable and reliable. Optionally, in this embodiment, four elastic pieces 3121 are disposed on the insulating frame 312, each elastic piece 3121 is provided with one fixture block, two clamping slots 250 are disposed at intervals on the first clamping plate 230, two clamping slots 250 are disposed at intervals on the second clamping plate 240, and the four fixture blocks are respectively clamped in the four clamping slots 250.
Optionally, the battery in this embodiment further includes an insulating film, and the pole body 210, the first clamping plate 230, and the second clamping plate 240 are wrapped and fastened together by using the insulating film and then placed in the case 100.
Optionally, the electrode core body 210 is formed by alternately folding or winding a positive electrode sheet, a negative electrode sheet and a separator, the tabs 220 include a positive electrode tab and a negative electrode tab, the positive electrode current collector extends out of one end of the electrode core body 210 to form the positive electrode tab, and the negative electrode fluid extends out of the other end of the electrode core body 210 to form the negative electrode tab. In this embodiment, the first clamping plate for clamping the positive electrode tab is structurally the same as the first clamping plate for clamping the negative electrode tab, and the second clamping plate for clamping the positive electrode tab is structurally the same as the second clamping plate for clamping the negative electrode tab. The connecting barrel (hereinafter referred to as positive connecting barrel) arranged on one side of the positive pole lug is made of high-quality aluminum alloy material, the connecting barrel (hereinafter referred to as negative connecting barrel) arranged on one side of the negative pole lug is made of one of stainless steel, nickel or copper alloy, and a copper alloy layer or a copper-aluminum composite plate is arranged on a first step tread arranged on an output plate on one side of the negative pole lug so as to weld and fix a turned edge on the negative connecting barrel and the first step tread. In this embodiment, a safety valve is disposed on the top cover plate on one side of the negative electrode tab, and when the battery thermally expands, high-temperature and high-pressure gas in the casing 100 can be discharged through the safety valve.
Optionally, in this embodiment, the liquid permeating hole 323 is formed in the positive electrode connecting barrel, and the negative electrode connecting barrel is not provided with the liquid permeating hole 323, but in other embodiments, the liquid permeating hole 323 may also be formed in the negative electrode connecting barrel, or the liquid permeating holes 323 are formed in both the positive electrode connecting barrel and the negative electrode connecting barrel, depending on actual production requirements.
It should be noted that, in this embodiment, the cross section of the positive electrode connection barrel and the negative electrode connection barrel is, for example, a circle as shown in fig. 1 to 12, and in other embodiments, the cross section may also be, for example, an ellipse as shown in fig. 12, or may also be other shapes, which is determined according to actual production requirements and use requirements, and is not limited specifically here.
The battery provided by the embodiment can realize laser welding of the tab 220 and the connecting barrel 320 at the outer side of the battery shell 100, so that the influence of particles such as smoke dust and residues caused by welding in the battery shell 100 on the inside of the battery is avoided, the short-circuit rate and the low-voltage rate of the battery are reduced, and the use safety and the use reliability of the battery are effectively improved; secondly, in the battery provided by the embodiment, the connecting barrel 320 is provided with the liquid permeating hole 323 communicated with the inside of the battery shell 100 and used for injecting electrolyte into the shell 100, so that the structure that the liquid injecting hole is formed in the top cover bracket 310 is omitted, and the effect of simplifying the whole structure of the top cover bracket 310 is achieved; thirdly, the battery that this embodiment provided, overall structure is simple, and then can simplify production technology, improve production efficiency, reduction in production cost, consequently is fit for being widely used widely.
In order to facilitate understanding, the first insulating clamping plate, the connecting barrel, the insulating holder and the like provided on the positive electrode tab side are referred to as a positive first insulating clamping plate, a positive connecting barrel, a positive insulating holder and the like, and the first insulating clamping plate, the connecting barrel, the insulating holder and the like provided on the negative electrode tab side are referred to as a negative first insulating clamping plate, a negative connecting barrel, a negative insulating holder and the like:
s1, alternately folding or winding a positive plate, a negative plate and a diaphragm to form a pole core body in a lamination or winding mode, wherein a part of the positive current collector extends out of one end of the pole core body to form a positive pole lug, and a part of the negative current collector extends out of the other end of the pole core body to form a negative pole lug;
s2, four positive electrode first fixing holes are formed in the positive electrode lug, and four negative electrode first fixing holes are formed in the negative electrode lug;
s3, pasting an anode buffer pad in the buffer groove of the anode first clamping plate, and pasting a cathode buffer pad in the buffer groove of the cathode first clamping plate;
s4, clamping a positive pole lug between a positive pole first clamping plate and a positive pole second clamping plate, sequentially penetrating a positive pole fixing column through a positive pole first fixing hole and a positive pole second fixing hole, bending the end part of the positive pole lug to form a positive pole folding edge, and clamping a positive pole buffer cushion between the positive pole folding edge and the bottom of a positive pole buffer groove;
s5, clamping a negative pole lug between a first negative pole clamping plate and a second negative pole clamping plate, sequentially penetrating a negative pole fixing column through a first negative pole fixing hole and a second negative pole fixing hole, bending the end part of the negative pole lug to form a negative pole folded edge, and clamping a negative pole buffering cushion between the negative pole folded edge and the bottom of a negative pole buffering groove;
s6, wrapping and fastening the pole core body, the positive first clamping plate, the positive second clamping plate, the negative first clamping plate and the negative second clamping plate by using an insulating film to form a wrapping piece, and putting the wrapping piece into the shell;
s7, clamping an anode clamping block on the anode insulating frame into an anode clamping groove to realize the connection of the anode cover plate assembly and the anode core assembly, and clamping a cathode clamping block on the cathode insulating frame into a cathode clamping groove to realize the connection of the cathode cover plate assembly and the cathode core assembly;
s8, carrying out sealing welding on the shell and the anode top cover plate, and carrying out sealing welding on the shell and the cathode top cover plate;
s9, laser welding is carried out on the groove bottom of the upper groove of the positive electrode connecting barrel and the positive electrode folding edge of the positive electrode lug;
s10, performing laser welding on the groove bottom of the groove in the negative electrode connecting barrel and the negative electrode folded edge of the negative electrode tab;
s11, drying, injecting electrolyte into the shell through the liquid seepage hole, forming, welding the positive sealing piece on the positive second step tread, welding the negative sealing piece on the negative second step tread, and grading.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A battery, comprising:
a housing (100), the housing (100) being provided with an opening (110);
the pole core assembly (200), the pole core assembly (200) comprises a pole core body (210) and a pole lug (220), the pole core body (210) is arranged in the shell (100), and the pole lug (220) is arranged at the end part of the pole core body (210);
apron subassembly (300), apron subassembly (300) include top cap support (310) and connect bucket (320), top cap support (310) shutoff in opening (110), it wears to locate to connect bucket (320) top cap support (310), it is equipped with recess (321) to connect bucket (320), the notch of recess (321) deviates from opening (110) sets up, the tank bottom of recess (321) with utmost point ear (220) are connected through laser welding.
2. The battery according to claim 1, wherein the pole core assembly (200) further comprises a first clamping plate (230) and a second clamping plate (240), the tab (220) is clamped between the first clamping plate (230) and the second clamping plate (240), a support portion (231) is arranged at the top of the first clamping plate (230), a folded edge (221) is arranged at the end of the tab (220), the folded edge (221) is arranged on the support portion (231), and the support portion (231) can support laser welding of the folded edge (221) and the groove bottom of the groove (321).
3. The battery according to claim 2, wherein the pole piece assembly (200) further comprises a cushion pad (260), the cushion pad (260) is sandwiched between the folded edge (221) and the support portion (231), and the cushion pad (260) is an elastic member.
4. The battery according to claim 2, wherein the tab (220) is provided with a first fixing hole (222), one of the first clamping plate (230) and the second clamping plate (240) is provided with a second fixing hole (241), and the other is provided with a fixing post (232), and the fixing post (232) is inserted into the first fixing hole (222) and the second fixing hole (241).
5. The battery according to claim 2, wherein the top cover bracket (310) is provided with a spring plate (3121), the spring plate (3121) can deform under the action of external force, the spring plate (3121) is provided with a clamping block, the first clamping plate (230) and/or the second clamping plate (240) is/are provided with a clamping groove (250), and the clamping block is clamped in the clamping groove (250) under the elastic action of the spring plate (3121).
6. The battery according to claim 1, wherein the cover plate assembly (300) further comprises an output plate (330), the output plate (330) is fixed on the top cover bracket (310), the output plate (330) is provided with a stepped hole, the stepped hole is provided with a first step tread (331), a connecting part (322) is arranged on the outer wall of the connecting barrel (320), the connecting barrel (320) penetrates through the stepped hole, and the connecting part (322) is fixedly connected with the first step tread (331).
7. The battery according to claim 6, characterized in that the edge of the recess (321) is provided with a flange extending in the direction away from the axis of the recess (321), the flange forming the connection (322).
8. The battery according to claim 6, wherein the cover plate assembly (300) further comprises a sealing plate (340), the stepped hole further has a second step tread (332), the sealing plate (340) is fixed on the second step tread (332), and the sealing plate (340) can block the notch of the groove (321).
9. The battery according to any one of claims 1 to 8, wherein the connection tub (320) is further provided with a liquid-permeable hole (323), the liquid-permeable hole (323) communicating with the inside of the case (100), and the electrolyte can enter the inside of the case (100) through the liquid-permeable hole (323).
10. The cell according to claim 9, wherein the weep holes (323) are located at the junction of the groove bottom of the groove (321) and the side walls of the groove (321).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211093985.8A CN115425343B (en) | 2022-09-08 | 2022-09-08 | Battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211093985.8A CN115425343B (en) | 2022-09-08 | 2022-09-08 | Battery cell |
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| CN115425343A true CN115425343A (en) | 2022-12-02 |
| CN115425343B CN115425343B (en) | 2024-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211093985.8A Active CN115425343B (en) | 2022-09-08 | 2022-09-08 | Battery cell |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276732A (en) * | 2020-03-30 | 2020-06-12 | 湖北亿纬动力有限公司 | Monomer formula battery and battery module |
| CN214672898U (en) * | 2021-03-15 | 2021-11-09 | 贵州中瑞丰泰新能源科技有限公司 | Battery structure for injecting liquid from end part of pole |
| CN216389481U (en) * | 2021-12-10 | 2022-04-26 | 合肥国轩高科动力能源有限公司 | Secondary battery |
| CN114583402A (en) * | 2022-03-16 | 2022-06-03 | 蔚来汽车科技(安徽)有限公司 | Battery and vehicle with same |
| CN115347287A (en) * | 2022-09-02 | 2022-11-15 | 宁夏宝丰昱能科技有限公司 | Battery top cover, battery and battery manufacturing method |
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2022
- 2022-09-08 CN CN202211093985.8A patent/CN115425343B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276732A (en) * | 2020-03-30 | 2020-06-12 | 湖北亿纬动力有限公司 | Monomer formula battery and battery module |
| CN214672898U (en) * | 2021-03-15 | 2021-11-09 | 贵州中瑞丰泰新能源科技有限公司 | Battery structure for injecting liquid from end part of pole |
| CN216389481U (en) * | 2021-12-10 | 2022-04-26 | 合肥国轩高科动力能源有限公司 | Secondary battery |
| CN114583402A (en) * | 2022-03-16 | 2022-06-03 | 蔚来汽车科技(安徽)有限公司 | Battery and vehicle with same |
| CN115347287A (en) * | 2022-09-02 | 2022-11-15 | 宁夏宝丰昱能科技有限公司 | Battery top cover, battery and battery manufacturing method |
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| Publication number | Publication date |
|---|---|
| CN115425343B (en) | 2024-09-27 |
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