CN114142180B - Battery switching member, battery and battery assembling method - Google Patents
Battery switching member, battery and battery assembling method Download PDFInfo
- Publication number
- CN114142180B CN114142180B CN202111438359.3A CN202111438359A CN114142180B CN 114142180 B CN114142180 B CN 114142180B CN 202111438359 A CN202111438359 A CN 202111438359A CN 114142180 B CN114142180 B CN 114142180B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011888 foil Substances 0.000 claims abstract description 93
- 238000003825 pressing Methods 0.000 claims abstract description 25
- 238000003475 lamination Methods 0.000 claims description 47
- 230000000670 limiting effect Effects 0.000 claims description 41
- 239000000872 buffer Substances 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 7
- 229910000679 solder Inorganic materials 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 35
- 210000004027 cell Anatomy 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000006173 Good's buffer Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
Abstract
The embodiment of the invention provides a battery switching member, a battery and an assembling method of the battery, and relates to the technical field of batteries. Compared with the prior art, the battery switching component provided by the invention has the advantages that the foil tab is pressed between the electric pressing sub-sheet and the electric switching master sheet, so that the contact area of the welding area formed by the receiving groove is larger, and the diversion and heat transfer capacity of the battery switching component is improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery switching member, a battery and an assembling method of the battery.
Background
The current battery technology generally adopts active materials to coat on ultrathin foil, leads out the tab from a local uncoated area of the foil, and is converged to a terminal post through a transfer sheet to be used by an external circuit, so that the reasonable design of the transfer sheet directly influences the performance of the battery. Currently, among three types of batteries, i.e., cylindrical, soft pack and square, the technology of adapting a tab adapted to a square battery is most complicated.
The current switching piece only adopts a single-side welding technology, namely the tab is directly welded on the switching piece, so that the current guiding and heat dissipating capacity of the switching piece is weaker.
Disclosure of Invention
The invention aims to provide a battery switching component, a battery and an assembling method of the battery, wherein the battery switching component and the battery have strong flow guiding and heat dissipating capabilities.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a battery adapting member, including an electrical adapting master slice and at least one electrical pressing sub slice, where one side surface of the electrical adapting master slice is provided with at least one receiving slot, the receiving slot is used for engaging a foil tab disposed at an end of a main body of an electrical core, the electrical pressing sub slice is disposed on the receiving slot and connected with the electrical adapting master slice, and the electrical pressing sub slice is used for being attached to the foil tab, so that the foil tab is pressed between the electrical pressing sub slice and the electrical adapting master slice.
In an alternative embodiment, the shape of the electrical pressing sub-sheet is adapted to the shape of the receiving slot, and the electrical pressing sub-sheet is welded on the receiving slot.
In an optional embodiment, the edge weld of the electrical lamination sub-sheet is disposed at the edge of the receiving slot, and a plurality of welding spots stitch-welded to the electrical transfer master sheet are disposed in the middle of the electrical lamination sub-sheet, so that the electrical lamination sub-sheet, the foil tab and the electrical transfer master sheet are welded into a whole.
In an alternative embodiment, the electrical switching master slice comprises a transverse slice, a vertical slice and a connecting slice which are integrally arranged, wherein the transverse slice is connected with one end of the connecting slice, one end of the vertical slice along the length direction is connected with the other end of the connecting slice, the receiving slot is arranged at two side edges of the vertical slice along the width direction, and the connecting slice is bent so that the transverse slice and the vertical slice are arranged at an included angle.
In an alternative embodiment, the width of the connecting piece is smaller than both the width of the vertical piece and the width of the transverse piece.
In an alternative embodiment, the battery adapting member further includes an insulating bottom film, the vertical piece and a portion of the connecting piece are attached to a side surface of the insulating bottom film, and the insulating bottom film is used for electrically isolating the electrical adapting master piece and the electric core main body.
In an alternative embodiment, a first limiting post is arranged on the insulating bottom membrane, a first limiting hole is formed in the connecting sheet, and the first limiting post is matched with the first limiting hole.
In an alternative embodiment, a second limiting post is arranged on the insulating bottom membrane, a second limiting hole is arranged on the vertical plate, and the second limiting post is matched and arranged in the second limiting hole.
In an optional embodiment, at least one side edge of the insulating bottom membrane is provided with a buffer column, at least one side edge of the vertical plate is provided with a yielding gap, and the buffer column is embedded in the yielding gap and is used for propping against the surface of the foil tab.
In a second aspect, the present invention provides a battery, including a battery core main body and a battery adapting member according to any one of the foregoing embodiments, where an end portion of the battery core main body is provided with a foil tab, and the battery core main body is disposed on one side of the electrical adapting master slice, and the receiving slot is disposed on a surface of the electrical adapting master slice, which faces away from the battery core main body, and the foil tab is bent and bonded on the receiving slot and is pressed between the electrical pressing sub-slice and the electrical adapting master slice.
In a third aspect, the present invention provides a method for assembling a battery as described above, the method comprising:
abutting one side surface of the foil tab against the side edge of the electrical transfer master;
and loading the electrical lamination sub-sheet into the receiving groove along the direction parallel to the receiving groove, and bending and attaching the foil tab into the receiving groove.
The beneficial effects of the embodiment of the invention include, for example:
according to the battery switching component provided by the invention, the receiving groove is formed in one side surface of the electrical switching master slice, the receiving groove is used for being connected with the foil tab arranged at the end part of the battery core main body, the electrical pressing sub-slice is arranged on the receiving groove and connected with the electrical switching master slice, and the electrical pressing sub-slice is used for being attached to the foil tab, so that the foil tab can be pressed between the electrical pressing sub-slice and the electrical switching master slice, a double-side welding technology is adopted for the foil tab, and the diversion and heat dissipation capacities of the foil tab and the battery switching component are improved. Compared with the prior art, the battery switching component provided by the invention has the advantages that the foil tab is pressed between the electric pressing sub-sheet and the electric switching master sheet, so that the contact area of the welding area formed by the receiving groove is larger, and the diversion and heat transfer capacity of the battery switching component is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a battery adapting member according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of the electrically connected master of FIG. 1;
FIG. 3 is a schematic view of the insulating bottom membrane of FIG. 1;
fig. 4 is a schematic view illustrating an assembly process of one side of a battery adapting member according to a first embodiment of the present invention;
fig. 5 is a schematic view illustrating an assembly process of the other side of the battery adapting member according to the first embodiment of the present invention;
fig. 6 is a schematic diagram of an assembly structure of a battery adapting member according to a first embodiment of the present invention.
Icon: 100-battery transfer member; 110-electrically switching the master; 111-transverse sheets; 113-vertical plates; 115-connecting piece; 117-yielding gap; 130-electrically pressing the sub-sheets; 150-a receiving slot; 170-insulating bottom film; 171-a first limit post; 173-a first limiting hole; 175-a second limit column; 177-a second limiting hole; 179-a buffer column; 200-a cell body; 210-foil tab.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
As disclosed in the background art, in the prior art, the battery technology generally adopts active materials to coat on ultrathin foil, and a local uncoated area of the foil is led out to form a tab, and the tab is converged to a terminal post through a transfer sheet to be used by an external circuit, so that the reasonable design of the transfer sheet directly affects the performance of the battery. In the field of square batteries, the current patch technology has several key requirements: high internal space utilization, excellent overcurrent heat conduction capability, simple process implementation mode, higher reliability and the like, and the existing switching technology is difficult to combine all the characteristics. And, the last unilateral welding technique that ordinary change-over piece and utmost point ear adopted, namely foil utmost point ear direct welding is at the surface of change-over piece, is connected with the utmost point post on upper portion after bending by the change-over piece again, and wherein the welding reliability between foil utmost point ear and the change-over piece is relatively poor to the welding effective area of contact of welding district is little, leads to the water conservancy diversion of welding district, heat dispersion weak, and then influences performance and the reliability of battery.
In order to solve the problems, the invention provides a novel battery switching component and a battery, which have strong flow guiding and heat dissipating capabilities and can effectively improve the performance and reliability of the battery. It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment
Referring to fig. 1 to 6 in combination, the present embodiment provides a battery adapting member 100, which is suitable for a battery and is used for connecting a foil tab 210 and a tab on a top cover, and the battery adapting member 100 can greatly improve the welding area of the foil tab 210, so that the flow guiding and heat dissipating capacity of a welding area is stronger, and the high space utilization rate and the excellent reliability can be considered.
The battery adapting member 100 provided in this embodiment includes an electrical adapting master 110 and at least one electrical lamination sub-sheet 130, wherein one side surface of the electrical adapting master 110 is provided with at least one receiving slot 150, the receiving slot 150 is used for engaging a foil tab 210 disposed at an end of the battery main body 200, the electrical lamination sub-sheet 130 is disposed on the receiving slot 150 and connected with the electrical adapting master 110, and the electrical lamination sub-sheet 130 is used for being attached to the foil tab 210, so that the foil tab 210 is laminated between the electrical lamination sub-sheet 130 and the electrical adapting master 110.
In the present embodiment, the electrical transfer master 110 is used to join the foil tab 210 and the post on the top cover, so as to realize the function of converging, and the specific flow guiding principle can refer to the existing transfer plate. Both the electrical connection mother sheet 110 and the electrical bonding mother sheet 130 are made of conductive metal, such as copper. And in actual assembly, the foil tab 210 may be placed in the receiving slot 150, then the electrical lamination sub-sheet 130 is covered on the receiving slot 150, and finally the electrical lamination sub-sheet 130, the foil tab 210 and the electrical transfer master 110 are welded into a whole, thereby ensuring connection reliability and good flow guiding and heat dissipation capabilities. Specifically, a receiving slot 150 is disposed on a side surface of the electrical connection master 110, the receiving slot 150 is used for engaging a foil tab 210 disposed at an end of the electrical core main body 200, the electrical lamination sub-sheet 130 is disposed on the receiving slot 150 and connected with the electrical connection master 110, and the electrical lamination sub-sheet 130 is used for being attached to the foil tab 210, so that the foil tab 210 can be laminated between the electrical lamination sub-sheet 130 and the electrical connection master 110, and a double-sided welding technology is adopted for the foil tab 210, thereby improving the current guiding and heat dissipation capabilities of the foil tab 210 and the battery connection member 100.
It should be noted that, in this embodiment, the foil tab 210 is disposed at the end of the electrical core main body 200 and extends outwards, and the foil tab 210 may be folded and disposed at the receiving slot 150, so that the electrical core main body 200 may be located at the rear of the electrical switching master 110, which clearly greatly improves the space utilization.
It should be noted that, in the present embodiment, two receiving slots 150 are disposed on the left and right sides of the electrical connection mother chip 110, and two electrical pressing sub-chips 130 are disposed at the same time, so that the welding of the foil tabs 210 on the two electrical core main bodies 200 can be realized. Of course, the number of the receiving slots 150 and the electrical lamination sub-pieces 130 is not limited in particular, and may be increased or decreased according to practical situations.
The electrical connection master 110 comprises a transverse sheet 111, a vertical sheet 113 and a connecting sheet 115 which are integrally arranged, wherein the transverse sheet 111 is connected with one end of the connecting sheet 115, one end of the vertical sheet 113 along the length direction is connected with the other end of the connecting sheet 115, the receiving groove 150 is formed in two side edges of the vertical sheet 113 along the width direction, and the connecting sheet 115 is bent so that the transverse sheet 111 and the vertical sheet 113 are arranged at an included angle. Specifically, an included angle of 90 ° is formed between the transverse sheet 111 and the vertical sheet 113, that is, the transverse sheet 111 is arranged along the horizontal direction, and the vertical sheet 113 is arranged along the vertical direction, so as to form a bent connection structure, and ensure high space utilization of the electrical switching master 110 in the horizontal direction.
In this embodiment, the width of the connecting piece 115 is smaller than both the width of the vertical piece 113 and the width of the lateral piece 111. Specifically, the transverse sheet 111, the vertical sheet 113 and the connecting sheet 115 are integrally arranged, and the connecting sheet 115 adopts a narrowed structure, so that the connecting sheet 115 has smaller width and smaller bending resistance, and is more beneficial to bending of the transverse sheet 111 and the vertical sheet 113.
In the present embodiment, the shape of the electrical lamination sub-sheet 130 is adapted to the shape of the receiving slot 150, and the electrical lamination sub-sheet 130 is welded on the receiving slot 150. Specifically, the edge of the electrical lamination sub-sheet 130 can be tightly attached to the edge of the receiving slot 150, so as to ensure the soldering effect of the electrical lamination sub-sheet 130.
In the present embodiment, the edge weld of the electrical lamination sub-sheet 130 is disposed at the edge of the receiving slot 150, and a plurality of welding spots stitch-welded to the electrical transfer mother sheet 110 are disposed at the middle of the electrical lamination sub-sheet 130, so that the electrical lamination sub-sheet 130, the foil tab 210 and the electrical transfer mother sheet 110 are welded into a whole. Specifically, the edge weld of the electrical lamination sub-sheet 130 is disposed at the edge of the receiving slot 150 and forms a weld at the edge, the electrical lamination sub-sheet 130 is fixed on the receiving slot 150, and meanwhile, the middle stitch welding of the electrical lamination sub-sheet 130 is disposed on the electrical transfer mother sheet 110, so that the welding spot can weld the upper electrical lamination sub-sheet 130, the middle foil tab 210 and the lower electrical transfer mother sheet 110 into a whole. The welding mode enables the foil tab 210 to be clamped between the electrical lamination sub-sheet 130 and the electrical transfer main sheet 110 more tightly, so that the mechanical structural stability of the whole welding area is improved, the effective contact area of the welding position is further increased, heat generated at the foil tab 210 can be conducted to the transverse sheet 111 along the vertical sheet 113 more quickly, and the improvement of the flow guiding and heat dissipating capacity is facilitated.
When the foil tab 210 is actually welded, the cell main body 200 approaches the vertical piece 113 from the left side and the right side of the vertical piece 113, and the foil tab 210 and the electrical lamination sub-piece 130 are covered on the preset receiving slot 150 in sequence. Specifically, the foil tab 210 extending from the end of the electrical core main body 200 is attached to the receiving slot 150, and then the electrical lamination sub-sheet 130 is covered, at this time, the electrical lamination sub-sheet 130 and the foil tab 210 need to be fixed, then seam welding is performed along the junction between the edge of the electrical lamination sub-sheet 130 and the edge of the receiving slot 150, and then stitch welding is performed on the electrical lamination sub-sheet 130 and the electrical transfer master 110 along the welding spot in the middle of the electrical lamination sub-sheet 130, so that the electrical lamination sub-sheet 130, the foil tab 210 and the electrical transfer master 110 are welded into a whole. After welding, the battery core main body 200 can be simply folded towards the rear along the edge of the vertical sheet 113, so that the foil tab 210 is folded, and the welding bending action of one of the foil tabs 210 is completed, thereby greatly improving the space utilization rate.
Referring to fig. 5 in combination, since two foil tabs 210 are disposed on the battery core main body 200 in this embodiment, after welding the foil tabs 210 on one side, the foil tabs 210 on the other side are vertically abutted against the edge of the vertical plate 113, that is, the edge of the receiving slot 150, at this time, the foil tabs 210 are not yet in a bent state, and are kept vertical to the vertical plate 113, then the electrical lamination sub-sheet 130 is loaded into the receiving slot 150 along the parallel direction of the vertical plate 113, and during loading, the electrical lamination sub-sheet 130 is laminated on the foil tabs 210, and the foil tabs 210 are bent and laminated in the receiving slot 150, and the rest of welding actions are consistent with the above welding process.
Referring to fig. 4 and fig. 5 in combination, for the structure of the dual-cell main body 200, two foil tabs 210 are respectively provided on two cell main bodies 200, and a total of 4 foil tabs 210 may be joined to two battery adapting members 100, where the foil tabs 210 at two ends of the first cell main body 200 may be all placed on the receiving slots 150 on the two vertical plates 113 in a flat welding manner, the foil tab 210 at one end of the other cell main body 200 may be in a flat welding manner, and the foil tab 210 at the other end may be joined in a cutting-pressing manner as shown in fig. 5.
Further, the battery adapting member 100 further includes an insulating bottom film 170, where the vertical piece 113 and a portion of the connecting piece 115 are attached to a side surface of the insulating bottom film 170, and the insulating bottom film 170 is used for electrically isolating the electrical adapting mother film 110 and the electrical core main body 200. Specifically, the insulating bottom film 170 is made of an insulating material, and the folded battery cell main body 200 is located at one side of the insulating bottom film 170 away from the vertical plate 113, so that the insulating bottom film 170 can play an insulating role between the vertical plate 113 and the battery cell main body 200, and the safety of the battery can be ensured.
In this embodiment, the insulating bottom film 170 is provided with a first limiting post 171, the connecting piece 115 is provided with a first limiting hole 173, and the first limiting post 171 is disposed in the first limiting hole 173 in a matching manner. Specifically, the first limiting hole 173 may be a fusing opening provided along the width direction of the connection tab 115 such that the effective width of the connection tab 115 is further narrowed, and when overcurrent occurs, the connection tab 115 may be fused at the first limiting hole 173, thereby securing the battery. After fusing, due to the limiting action of the first limiting post 171, the connection piece 115 is prevented from being displaced to be conducted again to cause a safety accident. Meanwhile, the first limiting column 171 and the first limiting hole 173 can also play a role in positioning during assembly, so that the connecting sheet 115 and the insulating bottom membrane 170 can be conveniently installed and positioned, and the assembly efficiency is improved.
It should be noted that, the first limiting hole 173 is a cross-shaped hole, and the first limiting post 171 is a cross-shaped post, which are mutually matched, so as to facilitate the installation and positioning of the connecting piece 115 and the insulating bottom film 170 in multiple directions. Of course, the shapes of the first limiting hole 173 and the first limiting post 171 may be rectangular or diamond, and the like, and are not limited herein.
In this embodiment, the insulating bottom film 170 is provided with a second limiting post 175, the vertical plate 113 is provided with a second limiting hole 177, and the second limiting post 175 is cooperatively disposed in the second limiting hole 177. Specifically, through setting up second spacing post 175 and second spacing hole 177, can play the effect of location when the equipment, make things convenient for the installation location between riser 113 and the insulating bottom diaphragm 170, further promoted packaging efficiency.
In this embodiment, at least one side edge of the insulating bottom film 170 is provided with a buffer post 179, at least one side edge of the vertical plate 113 is provided with a yielding gap 117, and the buffer post 179 is embedded in the yielding gap 117 and is used for abutting against the surface of the foil tab 210. Preferably, in this embodiment, buffer columns 179 are disposed at two side edges of the insulating bottom film 170, yielding notches 117 are disposed at two side edges of the vertical sheet 113, and the lengths of the buffer columns 179 and the lengths of the receiving slots 150 are adapted, and the yielding notches 117 are disposed at the edges of the two receiving slots 150, so that the buffer columns 179 can be correspondingly embedded in the yielding notches 117, on one hand, the positioning and mounting effects can be achieved, on the other hand, the buffer columns 179 can abut against the foil lugs 210 in the folded state, and stress at bending positions of the foil lugs 210 can be released, so that tearing of the foil lugs 210 during long-term use is avoided, and connection reliability is ensured.
Here, the buffer columns 179 are made of insulating non-hard material, such as resin, which can perform a good buffer function.
In this embodiment, the insulating bottom film 170 has both insulating and heat conducting functions. Specifically, the insulating base film 170 is formed of a high heat conductive material, wherein the high heat conductive material may be a heat conductive silica gel, a heat conductive ceramic, or a heat dissipation silicone grease, which can have a good heat conductive capability, so that heat generated at the tab 210 of the foil material can be uniformly and rapidly diffused toward the transverse sheet 111.
It should be noted that the insulating bottom film 170 can electrically isolate the cell main body 200 and the vertical sheet 113, so as to ensure the safety of the battery, and can assist heat to be conducted away along the main body of the vertical sheet 113, so as to reduce the thermal influence on the area of the welding area adjacent to the main body. Meanwhile, the folded edges of the foil electrode lugs 210 are abutted against the buffer columns 179, and stress at the folded positions of the foil electrode lugs 210 is released to the buffer columns 179 in a considerable part no matter in the process of folding the foil electrode lugs 210 in the assembling process or in the later long-life use process, so that potential damage or tearing risks at the foil electrode lugs 210 are reduced, and the reliability of connection is ensured.
Meanwhile, since the width of the connecting piece 115 is narrower than that of the transverse piece 111 and the vertical piece 113, the overcurrent heat conduction capacity of the connecting piece is lower than that of the adjacent transverse piece 111 and the adjacent vertical piece 113 in normal operation, the connecting piece 115 can be attached to the insulating bottom film 170, auxiliary heat conduction is realized through the insulating bottom film 170, and heat is accelerated to be guided from the vertical piece 113 to the transverse piece 111. Meanwhile, in this embodiment, the first limiting post 171 and the first limiting hole 173 are in a snap-in structure, under extreme conditions, the electrical switching master 110 is fused at the first limiting hole 173 to achieve the current limiting protection function, and the insulating bottom film 170 tightly combined by the vertical plate 113 and the cross-shaped first limiting post 171 can avoid free movement of the connecting sheet 115 or the vertical plate 113 remained near the fusing point, thereby preventing the electrical switching master 110 from being turned on again to strike fire, and greatly improving the safety and reliability of the battery after fusing.
In summary, in the battery adapting member 100 provided in the embodiment, the receiving groove 150 is disposed on one side surface of the electrical adapting master 110, the receiving groove 150 is used for connecting the foil tab 210 disposed at the end of the battery main body 200, the electrical lamination sub-sheet 130 is disposed on the receiving groove 150 and connected with the electrical adapting master 110, and the electrical lamination sub-sheet 130 is used for being attached to the foil tab 210, so that the foil tab 210 can be laminated between the electrical lamination sub-sheet 130 and the electrical adapting master 110, and a double-sided welding technology is adopted for the foil tab 210, thereby improving the current guiding and heat dissipation capabilities of the foil tab 210 and the battery adapting member 100. And simultaneously, the transverse sheet 111 and the vertical sheet 113 which are perpendicular to each other are connected through the connecting sheet 115, so that the battery adapting member 100 achieves space utilization in the horizontal direction. Meanwhile, the insulating bottom film 170 realizes two-in-one functions of insulation and heat conduction, separates the electrical switching master 110 and the battery core main body 200 on one hand, ensures the safety of the battery, and on the other hand can help the heat of the switching area to be conducted to the transverse sheet 111 along the vertical sheet 113 more quickly, and finally dissipates the heat to the outside of the battery. Meanwhile, through the engagement effect of the first limiting column 171 and the first limiting hole 173, safety accidents caused by the fact that the battery is conducted again after overcurrent fusing can be effectively avoided, and the safety of the battery is further improved.
Second embodiment
Referring to fig. 6 in combination, the present embodiment provides a battery, including a battery core main body 200 and the battery adapting member 100 according to the first embodiment, which has high safety, good reliability, good current guiding and heat dissipating capabilities, and excellent performance.
The battery provided in this embodiment may be a secondary battery, and the battery includes a battery core main body 200, a battery switching member 100, a top cover and a housing, wherein the battery core main body 200 is housed in the housing, the top cover is disposed at an upper opening of the housing, the battery switching member 100 includes an electrical switching mother sheet 110 and at least one electrical pressing sub-sheet 130, at least one receiving groove 150 is disposed on a side surface of the electrical switching mother sheet 110, and the electrical pressing sub-sheet 130 is disposed on the receiving groove 150 and connected with the electrical switching mother sheet 110. The end of the battery cell main body 200 is provided with a foil tab 210, the battery cell main body 200 is arranged on one side of the electrical transfer mother sheet 110, the receiving groove position 150 is arranged on one side surface of the electrical transfer mother sheet 110, which is away from the battery cell main body 200, and the foil tab 210 is bent and jointed on the receiving groove position 150 and is pressed between the electrical pressing sub-sheet 130 and the electrical transfer mother sheet 110.
Referring to fig. 4 and fig. 5 in combination, the present embodiment also provides an assembling method of a battery, which is used for assembling the foregoing battery, and the welding process can refer to the first embodiment, wherein two battery core main bodies 200 are provided, two ends of each battery core main body 200 are provided with foil tabs 210, and the two foil tabs are used for being attached to two electrical switching mother sheets 110, two receiving slots 150 are provided on each electrical switching mother sheet 110, and two electrical pressing sub-sheets 130 are provided, and the method provided in this embodiment includes the following steps:
s1: the foil tabs 210 at two ends of one of the cell main bodies 200 are respectively welded on the receiving slots 150 of the two cell transfer mother sheets 110 in a parallel manner, and the electrical lamination sub-sheets 130 are correspondingly attached to the two receiving slots 150.
S2: the foil tab 210 at one end of the other cell main body 200 is welded on the receiving slot 150 of one of the cell switching mother sheets 110 in a flat welding manner, and the electrical pressing sub-sheet 130 is correspondingly attached to the receiving slot 150.
S3: the foil tab 210 at the other end of the other cell body 200 is abutted against the side of the other electrically-connected master 110.
S4: the electrical lamination sub-sheet 130 is mounted in the receiving slot 150 along the direction parallel to the receiving slot 150, and the foil tab 210 abutted against the side edge of the electrical transfer mother sheet 110 is folded and bonded in the receiving slot 150.
For the structure of the single-cell main body 200, at least one of the foil tabs 210 at two ends of the cell main body 200 is engaged with the receiving slot 150 in the manner of step S3 and step S4, and reference may be made to the first embodiment specifically.
Meanwhile, the assembly process of other components of the battery, such as the case or the top cover, is identical to that of the conventional secondary battery, and will not be described in detail herein.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The battery switching component is characterized by comprising an electrical switching master piece and at least one electrical lamination sub piece, wherein one side surface of the electrical switching master piece is provided with at least one receiving groove, the receiving groove is used for being connected with a foil tab arranged at the end part of a battery core main body, the electrical lamination sub piece is arranged on the receiving groove and is connected with the electrical switching master piece, and the electrical lamination sub piece is used for being attached to the foil tab, so that the foil tab is laminated between the electrical lamination sub piece and the electrical switching master piece;
the shape of the electric pressing sub-piece is matched with the shape of the receiving groove, and the electric pressing sub-piece is welded on the receiving groove; and the edge weld joint of the electric pressing sub-sheet is arranged at the edge of the receiving groove position, and the electric pressing sub-sheet is fixed on the receiving groove position.
2. The battery transfer member of claim 1, wherein a plurality of solder joints stitch-welded to the electrical transfer master are disposed in a middle portion of the electrical lamination sub-sheet, so that the electrical lamination sub-sheet, the foil tab and the electrical transfer master are welded together.
3. The battery transfer member according to claim 1, wherein the electrical transfer master comprises a transverse sheet, a vertical sheet and a connecting sheet which are integrally arranged, the transverse sheet is connected with one end of the connecting sheet, one end of the vertical sheet along the length direction is connected with the other end of the connecting sheet, the receiving groove is arranged at two side edges of the vertical sheet along the width direction, and the connecting sheet is bent so that the transverse sheet and the vertical sheet are arranged at an included angle.
4. A battery transfer member according to claim 3, wherein the width of the connecting tab is less than both the width of the vertical tab and the width of the transverse tab.
5. The battery transfer member of claim 3, further comprising an insulating bottom film, wherein the vertical piece and a portion of the connecting piece are disposed on a surface of one side of the insulating bottom film, and the insulating bottom film is used for electrically isolating the electrical transfer master piece and the electrical core main body.
6. The battery transfer member of claim 5, wherein the insulating bottom membrane is provided with a first limiting post, the connecting piece is provided with a first limiting hole, and the first limiting post is cooperatively arranged in the first limiting hole.
7. The battery transfer member of claim 5, wherein a second spacing post is disposed on the insulating base membrane, a second spacing hole is disposed on the vertical plate, and the second spacing post is cooperatively disposed in the second spacing hole.
8. The battery switching member according to claim 5, wherein at least one side edge of the insulating bottom membrane is provided with a buffer post, at least one side edge of the vertical plate is provided with a yielding gap, and the buffer post is embedded in the yielding gap and is used for abutting against the surface of the foil tab.
9. A battery characterized by comprising a battery core main body and the battery switching component as claimed in any one of claims 1-8, wherein a foil tab is arranged at the end part of the battery core main body, the battery core main body is arranged on one side of the electrical switching master slice, the receiving slot is arranged on the surface of one side of the electrical switching master slice, which is away from the battery core main body, and the foil tab is bent and jointed on the receiving slot and is pressed between the electrical pressing sub slice and the electrical switching master slice.
10. A method of assembling a battery as claimed in claim 9, the method comprising:
abutting one side surface of the foil tab against the side edge of the electrical transfer master;
and loading the electrical lamination sub-sheet into the receiving groove along the direction parallel to the receiving groove, and bending and attaching the foil tab into the receiving groove.
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| CN202111438359.3A CN114142180B (en) | 2021-11-30 | 2021-11-30 | Battery switching member, battery and battery assembling method |
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| CN202111438359.3A CN114142180B (en) | 2021-11-30 | 2021-11-30 | Battery switching member, battery and battery assembling method |
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| CN116365182A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | Energy storage device, battery pack and electric equipment |
| CN116845497B (en) * | 2023-08-29 | 2023-12-26 | 深圳海辰储能控制技术有限公司 | Energy storage device and energy storage system |
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