CN114976497A - High-capacity battery - Google Patents
High-capacity battery Download PDFInfo
- Publication number
- CN114976497A CN114976497A CN202210599523.7A CN202210599523A CN114976497A CN 114976497 A CN114976497 A CN 114976497A CN 202210599523 A CN202210599523 A CN 202210599523A CN 114976497 A CN114976497 A CN 114976497A
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- Prior art keywords
- cover plate
- battery
- lower cover
- upper cover
- conductive connecting
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
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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
- 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
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a high-capacity battery, which mainly solves the problems that a conductive connecting piece of the existing battery has a complex structure and is not suitable for a structure with upper and lower cover plates as polar plates. The high-capacity battery comprises a battery shell, at least one battery cell and a conductive connecting piece: the battery shell is mainly formed by enclosing an upper cover plate, a lower cover plate and a battery box body, wherein the upper cover plate and the lower cover plate are respectively a positive pole and a negative pole of a high-capacity battery, and the upper cover plate and the lower cover plate are respectively provided with at least one through hole which is communicated along the thickness direction of the upper cover plate and the lower cover plate; the battery cell is arranged in the battery shell; one end of the conductive connecting piece is electrically connected with the pole lug of the battery cell, and the other end of the conductive connecting piece is inserted into the through holes of the upper cover plate and the lower cover plate and is electrically connected with the upper cover plate and the lower cover plate. The conductive connecting piece is simple in structure, and the upper cover plate, the lower cover plate and the battery cell lug can be reliably connected by only one component.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a high-capacity battery.
Background
The application field of the lithium ion battery is very wide, and in recent years, with the further development of the lithium ion battery, a plurality of lithium ion batteries are assembled into a large-capacity battery in series or in parallel, so that the large-capacity battery is applied to the fields of energy storage, power batteries and the like. After the battery is assembled into a large-capacity battery, the large-capacity battery is packaged in a cavity formed by the cover plate and the shell, so that the battery is safe and reliable to use. However, how to achieve reliable electrical connection of the components of the large-capacity battery is a critical part.
Chinese patent application CN113224469A discloses a battery pack, which comprises a housing and a battery module arranged in the housing, wherein the housing comprises a first housing and a second housing, at least part of the battery module is located in the first housing, the second housing is arranged in the first housing, the battery pack further comprises a circuit board, a first conductive part and a second conductive part, the circuit board is connected with the battery module, the first conductive part is arranged on the circuit board, and the first conductive part is electrically connected with the battery module; the second conductive part is arranged on the second shell, and the first conductive part and the second conductive part are detachably connected in a mutual insertion way. The battery pack enables the first conductive part to be electrically connected with the battery module by arranging the first conductive part on the circuit board, the second conductive part is arranged on the second shell, the first conductive part and the second conductive part are detachably connected in a plug-in mode, and the internal switching function of the positive electrode and the negative electrode is integrated in the shell assembly process. However, in the battery pack, the plurality of components including the circuit board, the first conductive part and the second conductive part are electrically connected, so that the conductive connection structure of the structure is complicated, and the structure using the upper cover plate and the lower cover plate as the pole plates is not suitable.
The Chinese patent application CN207852798U discloses a safe high-capacity soft package battery module, wherein a soft package lithium battery combined main body is formed by arranging a plurality of soft package lithium battery monomers, and a positive conductive current collector and a negative conductive current collector are arranged on each soft package lithium battery monomer; the safe high-capacity soft package battery module also comprises two fusing connecting strips and an upper cover, wherein the upper cover is provided with a positive pole column and a negative pole column; the fusing connecting strip is used for conducting a current collector on the single positive electrode of the soft package lithium battery and is connected with the positive electrode pole; and the other fusing connecting strip is used for connecting the single negative conductive current collector of the soft package lithium battery and is connected with the negative pole post. The battery module is electrically connected with the fusing connecting strip, the positive pole column and the negative pole column through the positive conductive current collector, the negative conductive current collector, the fusing connecting strip and the positive pole column.
Disclosure of Invention
The invention provides a high-capacity battery, aiming at solving the problems that the conductive connecting piece of the existing battery has a complex structure and is not suitable for a structure that an upper cover plate and a lower cover plate are polar plates.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a high capacity battery comprising a battery housing, at least one battery cell, and an electrically conductive connection: the battery shell is mainly formed by enclosing an upper cover plate, a lower cover plate and a battery box body, wherein the upper cover plate and the lower cover plate are respectively a positive pole and a negative pole of a high-capacity battery, and the upper cover plate and the lower cover plate are respectively provided with at least one through hole which is communicated along the thickness direction of the upper cover plate and the lower cover plate; the battery cell is arranged in the battery shell; one end of the conductive connecting piece is electrically connected with the pole lug of the battery cell, and the other end of the conductive connecting piece is inserted into the through holes of the upper cover plate and the lower cover plate and is electrically connected with the upper cover plate and the lower cover plate.
Furthermore, a plurality of sawtooth-shaped leading-out parts are arranged on the conductive connecting piece, and the leading-out parts are inserted into the through holes of the upper cover plate and the lower cover plate in a one-to-one correspondence manner and are electrically connected with the upper cover plate and the lower cover plate.
Further, parallelly connected or the series connection of a plurality of battery electric cores is battery electric core group, and a plurality of battery electric core group set up side by side in the battery shell, and the utmost point ear subtend of adjacent battery electric core group staggers the setting, and simultaneously, a plurality of through-holes form the intermittent hole of multiunit on upper cover plate, lower apron, the intermittent hole of multiunit is to the setting of staggering, and corresponds with the extraction portion of a plurality of conductive connecting piece and be connected.
Furthermore, the outer end faces of the upper cover plate and the lower cover plate are provided with strip grooves which correspond to the positions of the intermittent holes and are communicated with the intermittent holes, and the strip grooves are used for increasing the welding areas of the conductive connecting pieces and the upper cover plate and the lower cover plate.
Furthermore, the size of the leading-out part is sequentially reduced from the inner side to the outer side of the upper cover plate and the lower cover plate, so that the leading-out part can be accurately and quickly inserted into the through hole.
Furthermore, the leading-out part is provided with a bending part after extending out of the upper cover plate and the lower cover plate, so that the leading-out part is of an L-shaped structure, and the bending part is electrically connected with the upper cover plate and the lower cover plate.
Furthermore, the conductive connecting piece is provided with a tab connecting groove, and a tab of the battery cell is inserted into the tab connecting groove and is electrically connected with the conductive connecting piece.
Furthermore, the conductive connecting piece is electrically connected with the lug of the battery cell through laser welding or ultrasonic welding, and the conductive connecting piece is electrically connected with the upper cover plate and the lower cover plate through brazing, friction stir welding or electric welding.
Furthermore, an insulating layer is arranged between the upper cover plate, the lower cover plate, the electrode lugs, the conductive connecting piece and the battery box body.
Further, the insulating layer is an insulating gasket or insulating glue.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the high-capacity battery mainly comprises a battery shell, a battery cell and a conductive connecting piece, wherein the battery shell is mainly formed by enclosing an upper cover plate, a lower cover plate and a battery box body, and the upper cover plate and the lower cover plate are respectively a positive pole and a negative pole of the high-capacity battery. The invention is provided with one or more through holes along the thickness direction of the upper cover plate and the lower cover plate; meanwhile, a conductive connecting piece is additionally arranged in the battery shell with large capacity, one end of the conductive connecting piece is electrically connected with a lug of the battery cell, and the other end of the conductive connecting piece penetrates through the through holes of the upper cover plate and the lower cover plate and is electrically connected with the upper cover plate and the lower cover plate. The conductive connecting piece has a simple structure, and the reliable connection of the upper cover plate, the lower cover plate and the battery cell lug can be realized by only one part.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a first schematic structural diagram of a large-capacity battery according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a large-capacity battery according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a battery cell pack according to an embodiment of the present invention;
FIG. 4 is a first schematic structural diagram of an upper cover plate according to an embodiment of the present invention;
FIG. 5 is a second schematic structural diagram of an upper cover plate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a conductive connecting member according to an embodiment of the present invention.
Reference numerals: 1-upper cover plate, 2-lower cover plate, 3-battery box body, 4-battery cell, 5-pole ear, 6-conductive connecting piece, 7-leading-out part, 8-through hole, 9-strip groove and 10-pole ear connecting groove.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention and are not intended to limit the scope of the present invention.
The invention provides a high-capacity battery, which mainly comprises a battery shell, at least one battery cell and a conductive connecting piece, wherein the battery cell comprises: the battery shell is mainly formed by enclosing an upper cover plate, a lower cover plate and a battery box body, the upper cover plate and the lower cover plate are respectively a positive pole column and a negative pole column of a high-capacity battery, and the structure that the upper cover plate and the lower cover plate are pole columns greatly reduces the material cost of the battery, saves the internal space of the battery and improves the energy density of the battery; meanwhile, the pole is a heat accumulation part of the battery, and the pole is used as a battery cover plate, so that heat dissipation of the battery pole is facilitated; in addition, when a plurality of batteries are connected in series, the contact area between the pole posts is increased, the connection effectiveness of the batteries is improved, the generation of heat is reduced, and the safety and the service life of the batteries are improved. However, it is critical that the upper cover plate and the lower cover plate are respectively a positive pole and a negative pole of the large-capacity battery, and that reliable electrical connection between the upper cover plate and the negative pole and the battery cell tabs is achieved. Based on the structure, the upper cover plate and the lower cover plate are provided with one or more through holes along the thickness direction, and preferably a plurality of through holes are formed; meanwhile, a conductive connecting piece is additionally arranged in the battery shell with large capacity, one end of the conductive connecting piece is electrically connected with the lug of the battery cell, the other end of the conductive connecting piece penetrates through the through holes of the upper cover plate and the lower cover plate and is electrically connected with the upper cover plate and the lower cover plate, and the upper cover plate and the lower cover plate are reliably connected with the lug of the battery cell through the conductive connecting piece.
For the above conductive connecting member, a preferable structure thereof is: one end of the upper cover plate is provided with a plurality of saw-toothed leading-out parts which are correspondingly inserted into a plurality of through holes on the upper cover plate and the lower cover plate one by one and are electrically connected with the upper cover plate and the lower cover plate. The welding part of the conductive connecting piece and the pole plate is made into a rectangular tooth shape instead of a strip shape, so that the conductive connecting piece penetrates into the pole plate through an intermittent hole, and the conductive connecting piece mainly has the following two advantages: first, the intermittent holes provide negligible attenuation of the compressive stiffness of the plates. If the long holes are long, the compressive rigidity of the polar plate can be seriously weakened; second, intermittent brazing can reduce the internal stress generated by the linear expansion of the two materials. Therefore, the interrupted through holes on the upper cover plate and the lower cover plate ensure that the conductive connecting piece is smoothly inserted into the upper cover plate and the lower cover plate, and the integral rigidity of the upper cover plate and the lower cover plate is not influenced.
Further, the size of the leading-out part is reduced from the inner side to the outer side of the upper cover plate and the lower cover plate in sequence, and the welding area is further increased by the mode. In order to further increase the welding area, the outer side end faces of the upper cover plate and the lower cover plate are provided with strip grooves which correspond to the through holes in position and are communicated with the through holes, and the strip grooves can also increase the welding area of the conductive connecting piece with the upper cover plate and the lower cover plate. The holes arranged on the polar plate are intermittent holes, and meanwhile, the upper part of the polar plate is changed into an enlarged continuous strip hole (namely a strip groove), so that the design has the advantages that the pressure bearing rigidity of the polar plate can be kept by the intermittent holes at the bottom, the sufficient contact and welding between the leading-out part and the polar plate are ensured by the continuous strip hole at the upper part, the contact resistance between the leading-out part and the polar plate is reduced, and the sealing property and the pressure resistance of the polar plate are maintained.
In order to increase the rigidity of the upper cover plate and the lower cover plate, the intermittent holes are arranged on the left side and the right side of the upper cover plate and the lower cover plate in a staggered mode, not only are one battery cell connected with the upper cover plate and the lower cover plate through the intermittent holes, but also the conductive connecting pieces are distributed intermittently and uniformly along the left side and the right side of the upper cover plate and the lower cover plate when a plurality of battery cell groups are arranged, and the reason that the leading-out parts are not placed on the same side is also that the weakening of the rigidity of the pole plates caused by welding the open holes is reduced to the lowest.
Example 1
As shown in fig. 1 to 6, the present invention provides a large capacity battery, which includes a battery case, a plurality of battery cells 4, and a conductive connecting member 6: the battery shell is mainly formed by enclosing an upper cover plate 1, a lower cover plate 2 and a battery box body 3, wherein the upper cover plate 1 and the lower cover plate 2 are respectively a positive pole and a negative pole of a large-capacity battery, a plurality of through holes 8 penetrating along the thickness direction of the battery are formed in the upper cover plate 1 and the lower cover plate 2, a plurality of groups of intermittent holes are formed in the upper cover plate 1 and the lower cover plate 2 by the through holes 8, and the plurality of groups of intermittent holes are arranged on the left side and the right side of the upper cover plate 1 and the lower cover plate 2 in a staggered mode; the plurality of battery cells 4 are connected in parallel or in series to form a battery cell group, and the number of the battery cell group can be adjusted to 1, 2 or 3 … … according to the requirement of battery capacity; the capacity, voltage, internal resistance, self-discharge parameters and the like of different battery electric core groups are similar, a plurality of battery electric core groups are arranged in a battery shell side by side, the lugs 5 of the adjacent battery electric core groups are oppositely staggered, one side of the conductive connecting piece 6 is provided with a plurality of sawtooth-shaped leading-out parts 7, the leading-out parts 7 are correspondingly inserted into intermittent holes in the upper cover plate 1 and the lower cover plate 2 one by one, the leading-out parts 7 do not extend out of the upper cover plate 1 and the lower cover plate 2, and the welding with the upper cover plate 1 and the lower cover plate 2 can be realized in the intermittent holes; the other end of the conductive connecting piece 6 is provided with a tab connecting groove 10, and a tab 5 of the battery cell 4 is inserted into the tab connecting groove 10 and welded with the conductive connecting piece 6.
The conductive connecting piece 6 is electrically connected with the lug 5 of the battery cell 4 through laser welding or ultrasonic welding, the conductive connecting piece 6 is electrically connected with the upper cover plate 1 and the lower cover plate 2 through brazing, friction stir welding or electric welding, the conductive connecting piece 6 can realize reliable connection of the upper cover plate 1 and the lower cover plate 2 with the lug 5 of the battery cell 4, and the conductive connecting piece is simple in structure and reliable in connection. In addition, an insulating layer can be arranged among the upper cover plate 1, the lower cover plate 2, the lugs, the conductive connecting piece and the battery box body 3, and the insulating layer is an insulating gasket or insulating glue.
Example 2
As shown in fig. 1 to 6, the present invention provides a large capacity battery, which includes a battery case, a plurality of battery cells 4, and a conductive connecting member 6: the battery shell is mainly formed by enclosing an upper cover plate 1, a lower cover plate 2 and a battery box body 3, wherein the upper cover plate 1 and the lower cover plate 2 are respectively a positive pole and a negative pole of a large-capacity battery, a plurality of through holes 8 penetrating along the thickness direction of the battery are formed in the upper cover plate 1 and the lower cover plate 2, a plurality of groups of intermittent holes are formed in the upper cover plate 1 and the lower cover plate 2 by the through holes 8, and the plurality of groups of intermittent holes are arranged on the left side and the right side of the upper cover plate 1 and the lower cover plate 2 in a staggered mode; the battery electric cores 4 are connected in parallel or in series to form a battery electric core group, the battery electric core groups are arranged in the battery shell side by side, the lugs 5 of the adjacent battery electric core groups are arranged in a staggered mode in an opposite direction, one side of the conductive connecting piece 6 is provided with a plurality of sawtooth-shaped leading-out parts 7, the leading-out parts 7 are inserted into the intermittent holes of the upper cover plate 1 and the lower cover plate 2 in a one-to-one correspondence mode, the leading-out parts 7 do not extend out of the upper cover plate 1 and the lower cover plate 2, and the upper cover plate 1 and the lower cover plate 2 are welded in the intermittent holes; the other end of the conductive connecting piece 6 is provided with a tab connecting groove 10, and a tab 5 of the battery cell 4 is inserted into the tab connecting groove 10 and welded with the conductive connecting piece 6. The conductive connecting piece 6 can realize the reliable connection of the upper cover plate 1, the lower cover plate 2 and the pole ear 5 of the battery cell 4.
In order to realize reliable electric connection between the conductive connecting piece 6 and the upper cover plate 1 and the lower cover plate 2, the conductive connecting area between the conductive connecting piece 6 and the upper cover plate 1 and the lower cover plate 2 can be further increased, the conductive area can be increased by two methods, first, a long groove 9 corresponding to the position of the intermittent hole and communicated with the intermittent hole is arranged on the outer side end surface of the upper cover plate 1 and the lower cover plate 2, the welding area of the conductive connecting piece 6 and the upper cover plate 1 and the lower cover plate 2 is increased through the long groove 9, secondly, the size of the leading-out part 7 is reduced from the inner side to the outer side of the upper cover plate 1 and the lower cover plate 2 in sequence, the size of the matching part of the leading-out part 7 and the upper cover plate 1 and the lower cover plate 2 is set to be smaller, the welding area of the conductive connecting piece 6 and the upper cover plate 1 and the lower cover plate 2 is increased, and meanwhile, the leading-out part 7 can be accurately and quickly inserted into the through hole 8 through the arrangement.
Example 3
As shown in fig. 1 to 5, the present invention provides a large capacity battery, which includes a battery case, a plurality of battery cells 4, and a conductive connecting member 6: the battery shell is mainly formed by enclosing an upper cover plate 1, a lower cover plate 2 and a battery box body 3, wherein the upper cover plate 1 and the lower cover plate 2 are respectively a positive pole and a negative pole of a large-capacity battery, a plurality of through holes 8 penetrating along the thickness direction of the battery are formed in the upper cover plate 1 and the lower cover plate 2, a plurality of groups of intermittent holes are formed in the upper cover plate 1 and the lower cover plate 2 by the through holes 8, and the plurality of groups of intermittent holes are arranged on the left side and the right side of the upper cover plate 1 and the lower cover plate 2 in a staggered mode; a plurality of battery electricity core 4 are parallelly connected or establish ties and are the battery electric core group, a plurality of battery electric core groups set up side by side in the battery case, and 5 subtend stagger settings of utmost point ear of adjacent battery electric core group, one side of conductive connecting piece 6 is provided with the extraction 7 of a plurality of cockscomb structures, a plurality of extraction 7 one-to-ones pass upper cover plate 1, the interrupted hole on the apron 2 down, and extend upper cover plate 1, apron 2 down, this extraction 7, the extension of extraction 7 is provided with the portion of bending, make conductive connecting piece 6 be L shape structure, the portion of bending and upper cover plate 1, apron 2 electricity is connected down. The other end of the conductive connecting piece 6 is provided with a tab connecting groove 10, and a tab 5 of the battery cell 4 is inserted into the tab connecting groove 10 and is welded with the conductive connecting piece 6. The conductive connecting piece 6 can realize reliable connection of the upper cover plate 1 and the lower cover plate 2 with the lugs 5 of the battery cell 4, and the connection of the leading-out part with the upper cover plate 1 and the lower cover plate 2 is more reliable due to bending connection.
The structure of the conductive connecting member 6 is shown as 6: the long strip teeth at the lower part are respectively welded with the electrode lugs 4 of each battery electric core group by laser welding or ultrasonic welding, and the short teeth at the upper part are connected with the pole plates by brazing. The short tooth-shaped top of the upper part can be provided with a chamfer which has two functions, one of which is beneficial to the quick and accurate insertion of the conductive connecting piece 6 into the polar plate; secondly, the flowing space of the brazing filler metal and the contact surface of the brazing filler metal are enlarged. The conductive connecting member 6 and the electrode plate may be welded by, for example, friction stir welding or electric welding, in addition to brazing. The conductive connecting piece 6 has the advantages of simple structure, saving connecting materials, reducing connecting resistance, exact structure and good rigidity.
When the aluminum-based brazing filler metal is brazed with a polar plate and an aluminum anode is welded, the aluminum-based brazing filler metal is adopted; when welding a copper negative electrode, copper-based brazing filler metal is adopted; when the battery cavity is filled with electrolyte, the conductive connecting piece 6 of the negative electrode is completely made of copper at the position capable of contacting the electrolyte. In order to change the contact part of the aluminum electrode plate and the electrolyte into copper, the following method can be adopted: 1) the common contact area adopts a method of plating aluminum and copper; 2) the copper base material with thicker and larger area is connected with the aluminum polar plate into a whole by adopting the modes of interference embedding, internal pin riveting, copper-based brazing filler metal sealing, copper screw interface locking and the like; in order to solve the problem of different linear expansion coefficients of copper and aluminum, the joint surface of copper and aluminum should be designed into a regular or irregular mutual nesting form, so that operations such as welding or threaded connection can be performed on the copper base material.
Claims (10)
1. A large capacity battery, characterized by comprising:
a battery case; the battery shell is mainly formed by enclosing an upper cover plate, a lower cover plate and a battery box body, wherein the upper cover plate and the lower cover plate are respectively a positive pole and a negative pole of a high-capacity battery, and the upper cover plate and the lower cover plate are respectively provided with at least one through hole which is communicated along the thickness direction of the upper cover plate and the lower cover plate;
at least one battery cell; the battery cell is arranged in the battery shell; and
a conductive connection member; one end of the conductive connecting piece is electrically connected with the pole lug of the battery cell, and the other end of the conductive connecting piece is inserted into the through holes of the upper cover plate and the lower cover plate and is electrically connected with the upper cover plate and the lower cover plate.
2. A large capacity battery as claimed in claim 1, wherein the conductive connecting member is provided with a plurality of serrated lead-out portions, and the plurality of lead-out portions are inserted into the plurality of through holes of the upper cover plate and the lower cover plate in a one-to-one correspondence and are electrically connected to the upper cover plate and the lower cover plate.
3. A large capacity battery as defined in claim 2, wherein a plurality of battery cells are connected in parallel or in series to form a plurality of battery cell groups, the plurality of battery cell groups are arranged side by side in the battery casing, and the tabs of adjacent battery cell groups are arranged in a staggered manner, and meanwhile, a plurality of through holes form a plurality of groups of intermittent holes on the upper cover plate and the lower cover plate, the plurality of groups of intermittent holes are arranged in a staggered manner and are correspondingly connected with the leading-out parts of the plurality of conductive connecting members.
4. A large capacity battery as defined in claim 4, wherein the outer side end faces of the upper and lower cap plates are provided with elongated grooves corresponding to the intermittent holes and communicating with the intermittent holes, the elongated grooves being adapted to increase the welding area between the conductive connecting members and the upper and lower cap plates.
5. The large capacity battery according to claim 2, wherein the size of the lead-out portion is reduced from the inside to the outside of the upper and lower cap plates in order to allow the lead-out portion to be accurately and rapidly inserted into the through-hole.
6. The large capacity battery according to claim 2, wherein the lead-out portion is provided with a bent portion after extending out of the upper and lower cover plates, so that the lead-out portion has an L-shaped structure, and the bent portion is electrically connected to the upper and lower cover plates.
7. The high-capacity battery as claimed in claim 2, wherein the conductive connecting member is provided with tab connecting grooves, and tabs of the battery cells are inserted into the tab connecting grooves and electrically connected to the conductive connecting member.
8. The high-capacity battery as claimed in claim 1 or 2, wherein the conductive connecting member is electrically connected to the tab of the battery cell by laser welding or ultrasonic welding, and the conductive connecting member is electrically connected to the upper cover plate and the lower cover plate by soldering, friction stir welding or electric welding.
9. The large capacity battery as claimed in claim 1 or 2, wherein an insulating layer is provided between the upper cover plate, the lower cover plate, the tab, the conductive connecting member and the battery case.
10. The large capacity battery as claimed in claim 9, wherein the insulating layer is an insulating gasket or an insulating paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210599523.7A CN114976497A (en) | 2022-05-30 | 2022-05-30 | High-capacity battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210599523.7A CN114976497A (en) | 2022-05-30 | 2022-05-30 | High-capacity battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114976497A true CN114976497A (en) | 2022-08-30 |
Family
ID=82957439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210599523.7A Pending CN114976497A (en) | 2022-05-30 | 2022-05-30 | High-capacity battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114976497A (en) |
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2022
- 2022-05-30 CN CN202210599523.7A patent/CN114976497A/en active Pending
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