CN214099713U - Radiating electric core packaging structure of electrode lid - Google Patents
Radiating electric core packaging structure of electrode lid Download PDFInfo
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- CN214099713U CN214099713U CN202120372501.8U CN202120372501U CN214099713U CN 214099713 U CN214099713 U CN 214099713U CN 202120372501 U CN202120372501 U CN 202120372501U CN 214099713 U CN214099713 U CN 214099713U
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- current collector
- electrode
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- collector junction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
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- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
This patent provides a radiating electric core packaging structure of electrode cap, and it has solved the mass flow body and has connected the problem of difficulty with the shell, can reduce the manufacturing cost of electric core group by a wide margin, and electric core can improve the life cycle and the security of electric core through the heat dissipation of electrode cap. It comprises at least one lamination unit and at least one electrode cover; each laminated unit at least comprises a current collector with one polarity and a composite material, and the current collector junction formed by connecting the current collector extensions of at least one current collector with the same polarity in at least one laminated unit is communicated with one electrode cover.
Description
Technical Field
The patent relates to a packaging structure of a laminated unit group consisting of a plurality of laminated units.
Background
The battery cell as an electricity storage device generally comprises a lamination unit, an outer package and a lead-out tab. The laminated unit of the sheet-shaped cell generally includes a positive electrode current collector (sheet), a negative electrode current collector (sheet), and a separator (sheet). In the use of slice electricity core, carry out the heat exchange through the slice mass flow body and can increase substantially the heat exchange capacity of lamination unit, improve the cycle life and the security etc. of lamination unit, however, the slice mass flow body is in large quantity and thin, and its and encapsulation are big with the connection degree of difficulty of the outside shell of lamination unit, are the main bottleneck that influences this kind of structure volume production.
Disclosure of Invention
The purpose of this patent is to provide a radiating electric core packaging structure of electrode cap, and it has solved the mass flow body and has connected the problem of difficulty with the shell, can reduce substantially the manufacturing cost of electric core group, and electric core can be through the heat dissipation of electrode cap, improves the cycle life and the security of electric core.
A battery cell packaging structure with an electrode cover for heat dissipation comprises at least one lamination unit and at least one electrode cover; each laminated unit at least comprises a current collector with one polarity and a composite material, and the current collector junction formed by connecting the current collector extensions of at least one current collector with the same polarity in at least one laminated unit is communicated with one electrode cover.
In the battery cell packaging structure with the electrode cover for heat dissipation, the current collector extension part is bent and then is connected with the electrode cover in a conduction mode.
In the battery cell packaging structure with the electrode cover for heat dissipation, the current collector extension part is connected with the heat conducting piece, and the heat conducting piece is connected with the electrode cover in a conduction manner.
The heat conducting piece is bent and then conducted with the electrode cover to be connected with the radiating battery cell packaging structure of the electrode cover.
In the battery cell packaging structure with the heat radiation electrode cover, the current collectors of the lamination unit comprise the positive current collector and the negative current collector which are opposite; the number of the electrode cover is one; the positive electrode current collector extension parts of at least one lamination unit are connected together to form a positive electrode current collector junction part, or the negative electrode current collector extension parts of at least one lamination unit are connected together to form a negative electrode current collector junction part, and the positive electrode current collector junction part or the negative electrode current collector junction part is connected with the electrode cover in a conduction mode.
In the battery cell packaging structure with the heat radiation electrode cover, the current collectors of the lamination unit comprise the positive current collector and the negative current collector which are opposite; two electrode covers are provided; the extension parts of the positive current collectors of at least one lamination unit are attached together to form a positive current collector junction part, and the extension parts of the negative current collectors of at least one lamination unit are attached together to form a negative current collector junction part; and the positive current collector junction and the negative current collector junction are simultaneously and respectively communicated with the two electrode covers.
The battery cell packaging structure with the electrode covers capable of dissipating heat further comprises an insulating support body connected with the two electrode covers.
In the battery cell packaging structure with the heat radiation electrode cover, the insulating support body is hermetically connected with the electrode cover.
The battery cell packaging structure with the heat radiation electrode cover further comprises an outer package which is coated outside the electrode cover and the insulating support body and hermetically connects the insulating support body and the electrode cover together. For example, the outer package is an aluminum plastic film.
The battery cell packaging structure with the heat radiation electrode cover is characterized in that the electrode cover made of the conductive material is not connected with the insulating support body in a conduction mode.
According to the battery cell packaging structure with the electrode cover for heat dissipation, the energy absorption component for absorbing expansion of the lamination units is arranged between two adjacent lamination units or between the lamination units and the insulating support body. For example, the energy absorbing member is an elastically compressible sheet.
In the battery cell packaging structure with the electrode cover for heat dissipation, the electrode cover is made of the metal material with good heat-conducting property.
The battery cell packaging structure with the electrode cover for heat dissipation further comprises a shell wrapped outside each lamination unit, and the shell is connected with the cover plate in a sealing mode.
The insulating support may be any structure capable of insulating and connecting the two electrode caps. The connection mode of the electrode cover and the insulating support body can be bonding, riveting, welding and the like, and the specific connection mode does not influence the protection scope of the patent claims.
The electrode cover may be a flat plate, a plate with heat dissipating fins, a plate with raised edges, etc., and the specific shape of the electrode cover plate does not affect the scope of protection of the present patent claims.
The beneficial effect of this patent:
this application links together at least a kind of mass flow body extension of a lamination unit and forms the mass flow body confluence portion and switches on with the electrode lid and link to each other, and the heat of lamination unit can be through the quick outside heat dissipation such as mass flow body extension, mass flow body confluence portion, electrode lid, and the radiating effect is good, and the mass flow body confluence portion that links together simultaneously is convenient to link to each other with the electrode lid, and production is convenient.
The current collector in a typical laminated unit includes opposing positive and negative current collectors, where the current collector extension may be either a positive current collector extension or a negative current collector extension. The positive current collector extension is formed by the positive current collector extending laterally beyond the laminated cell body (e.g., the opposing positive and negative current collectors), and the negative current collector extension is formed by the negative current collector extending laterally beyond the laminated cell body. Of course, the current collector junction may be a positive electrode current collector junction or a negative electrode current collector junction. The positive current collector junction or the negative current collector junction is connected to one electrode cap, or the positive current collector junction and the negative current collector junction are connected to two electrode caps respectively at the same time.
However, there are also laminated units having only one type of current collector, such as a solid state battery laminated unit, only a positive current collector, and the electrolyte is a negative electrode, in which case the current collector extension is a positive current collector extension whose positive current collector extends beyond the body of the laminated unit, and the current collector junction can only be a positive current collector junction that is connected to an electrode cap.
The energy absorbing component can absorb the expansion amount of the laminated units when the laminated units expand due to various reasons (such as overpressure and overheating), and prevent excessive extrusion between the laminated units so as to avoid explosion of the laminated units. Energy absorbing members come in a wide variety, such as elastomeric compression pads.
The current collector junction part is connected with the electrode cover in a conduction mode, the electrode cover plays a role in leading out a tab at the moment, and the lamination unit can be electrically connected with the outside through the electrode cover. Of course, if the positive electrode current collector junction and the negative electrode current collector junction are simultaneously and respectively conductively connected to the two electrode caps, the two electrode caps cannot be simultaneously conductively connected to the insulating support.
In order to better transfer heat and conveniently connect with the electrode cover, a heat conducting piece is connected on the current collector junction part of the lamination unit, one of the current collector junction part and the heat conducting piece is connected with the electrode cover in a conduction mode, or the current collector junction part and the heat conducting piece are connected with the electrode cover in a conduction mode after being bent together. Of course, the heat conducting member and the electrode cover are made of a material having good heat conducting property, such as a metal material. The insulating support body is connected with the two electrode covers in an insulating mode, the insulating support body and the electrode covers are bonded, riveted or welded to be sealed, or the outer package is used for fixing the electrode covers and the insulating support body together and sealing, so that the battery core is isolated from the outside.
When the electrode cover radiating battery cell packaging structure is manufactured, firstly, the prior art is used for manufacturing a lamination unit with a current collector junction part through winding or lamination and the like, a heat conducting piece can be arranged at the current collector junction part to improve the heat conducting capacity, and then the current collector junction part or/and the heat conducting piece are bent and then connected with the electrode cover through welding processes such as ultrasonic waves, laser, resistance welding, brazing and the like, or riveting processes.
After the connection is completed, the insulating support body is arranged between the two electrode covers to support the electrode covers, then the electrode covers and the insulating support body are bonded or welded or riveted for sealing, or the electrode covers and the insulating support body are wrapped and sealed by using an outer package, or a shell and a cover plate are connected in a sealing way, and finally the prior art is used for vacuumizing, filling electrolyte, forming, replenishing liquid, evacuating, packaging and the like, so that the manufacturing of the electric core group is completed.
Drawings
FIG. 1 is a front view of embodiment 1;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an enlarged view of the connection of the lamination unit, the electrode cap, the insulating support, etc. of example 1;
fig. 4 is a schematic view of a lamination unit in example 1 (when the positive electrode current collector junction and the negative electrode current collector junction are not bent);
FIG. 5 is a schematic view showing the connection of the lamination unit and the heat-conductive member in embodiment 2;
fig. 6 is a schematic view showing the connection of the laminated unit and the heat conductive member in example 2 (when the positive electrode current collector junction and the negative electrode current collector junction are bent);
FIG. 7 is a schematic view showing the connection of the laminated unit and the heat-conductive member in example 3 (when the heat-conductive member is bent);
fig. 8 is a schematic view showing the connection of the laminated unit and the heat conductive member in example 4 (when the positive electrode current collector junction, the negative electrode current collector junction, and the heat conductive member are all bent).
In the figure, a positive current collector 1, a negative current collector 2, a positive current collector junction 3, a negative current collector junction 4, a composite material 5, an insulating support 6, a heat conducting piece 7, an outer package 8, an electrode cover 9, an elastic compression sheet 10 and a sheet-shaped lamination unit 100.
Detailed Description
Example 1
Referring to fig. 1-2, the electrode cap heat dissipation cell encapsulation structure includes a plurality of sheet lamination units 100 arranged in a thickness direction to form a row, two electrode caps 9 made of metal material with good electrical and thermal conductivity, and an insulating support 8 supporting and connecting the two electrode caps 9. Between the two lamination units 100 there is provided an elastic compression sheet 10.
Referring to fig. 4, each laminated unit 100 has a plurality of positive and negative electrode current collectors 1 and 2 arranged at relatively intervals in thickness, and a composite material 5 between the opposite positive and negative electrode current collectors.
The positive current collector 1 of each lamination unit extends towards the left side and exceeds a plurality of positive current collector extension parts formed by the opposite surfaces of the positive and negative current collectors to be jointed together to form a positive current collector joint part 3, and the negative current collector 2 of each lamination unit extends towards the right side and exceeds a plurality of negative current collector extension parts formed by the opposite surfaces of the positive and negative current collectors to be jointed together to form a negative current collector joint part 4.
Referring to fig. 3, an outer package (e.g., an aluminum-plastic film) 8 is wrapped outside the two electrode caps 9 and the insulating support body 6, and the insulating support body 6 and the two electrode caps 9 are hermetically connected together.
Referring to fig. 1 and 3, the positive electrode collector junction part 3 and the negative electrode collector junction part 4 of each lamination unit 100 are respectively connected to the two electrode caps by conduction after being bent.
Example 2
Referring to fig. 5 and 6, the main difference between the embodiment 2 and the embodiment 1 is that: the positive electrode current collector junction 3 and the negative electrode current collector junction 4 of each lamination unit 100 are respectively connected with a heat conducting member 7 (see fig. 5), and after the positive electrode current collector junction 3 and the negative electrode current collector junction 4 are bent, the heat conducting member 7 is connected with the two electrode covers in a conduction manner (see fig. 6, fig. 1 and fig. 3).
Example 3
Referring to fig. 7 and fig. 1 and 3, embodiment 3 mainly differs from embodiment 1 in that: the positive current collector junction 3 and the negative current collector junction 4 of each lamination unit 100 are respectively connected with a heat conducting piece 7, the positive current collector junction 3 and the negative current collector junction 4 are not bent, and the heat conducting pieces 7 are respectively connected with the two electrode covers after being bent.
Example 4
Referring to fig. 8 and fig. 1 and 3, embodiment 4 mainly differs from embodiment 1 in that: the positive current collector junction part 3 and the negative current collector junction part 4 of each lamination unit 100 are respectively connected with a heat conducting piece 7, the positive current collector junction part 3, the negative current collector junction part 4 and the heat conducting piece 7 are bent, and the bent heat conducting piece 7 is connected with two electrode covers in a conduction mode.
The heat conducting piece is optional and is used for improving the heat dissipation and electric conduction capability of the lamination unit;
the number of the insulating support bodies can be one or a plurality of, and the specific shape and structure of the insulating support bodies do not affect the protection scope of the patent claims;
the outer package may be any film capable of wrapping, insulating and sealing the electrode cover and the insulating support, and is preferably an aluminum plastic film.
The internal structure of the lamination unit, the electricity storage mechanism, the composition of the composite material, etc. do not affect the protection scope of the patent claims.
Additional structures provided for safety do not affect the scope of protection of the patent claims.
The lamination unit, outside which the packaging can be provided as required, does not affect the scope of protection of the patent claims.
The electrode cover can be made of any conductor material, and the specific material of the electrode cover does not influence the protection scope of the patent claims.
The current collector extension or the heat conducting member may be simply attached to the cell cover, or may be bonded, riveted, welded, or the like, without affecting the scope of the present patent claims.
The shape of the electrode cover can be flat, and can also be a structure with various convex features, such as additional radiating fins, extruded bulges, edges formed by partially or totally bending the periphery, and the like, and the shape of the electrode cover does not influence the protection scope of the patent claims.
The novel structure has the advantages of simple structure of components, low production cost, excellent manufacturability, simple and reliable process, capability of greatly reducing the production cost of the electric core group, change of the traditional structure and production process of the electric core group, and very important practical significance on the development and popularization of the electricity storage device.
Claims (10)
1. A battery cell packaging structure with an electrode cover for heat dissipation comprises at least one lamination unit and at least one electrode cover; each lamination unit at least comprises a current collector with one polarity and a composite material, and is characterized in that: the current collector junction formed by connecting the current collector extensions of at least one current collector of the same polarity in at least one lamination unit is conductively connected to one electrode cap.
2. The heat dissipating cell encapsulation structure of claim 1, wherein: the current collector extension part is connected with the electrode cover after being bent.
3. The heat dissipating cell encapsulation structure of claim 1, wherein: the current collector extension part is connected with the heat conducting piece, and the heat conducting piece is connected with the electrode cover in a conduction mode.
4. The heat dissipating cell packaging structure of claim 3, wherein: the heat conducting piece is connected with the electrode cover after being bent.
5. The heat dissipating cell encapsulation structure of claim 1, wherein: the current collectors of the laminated unit include opposing positive and negative current collectors; the number of the electrode cover is one; the positive electrode current collector extension parts of at least one lamination unit are connected together to form a positive electrode current collector junction part, or the negative electrode current collector extension parts of at least one lamination unit are connected together to form a negative electrode current collector junction part, and the positive electrode current collector junction part or the negative electrode current collector junction part is connected with the electrode cover in a conduction mode.
6. The heat dissipating cell encapsulation structure of claim 1, wherein: the current collectors of the laminated unit include opposing positive and negative current collectors; two electrode covers are provided; the extension parts of the positive current collectors of at least one lamination unit are attached together to form a positive current collector junction part, and the extension parts of the negative current collectors of at least one lamination unit are attached together to form a negative current collector junction part; and the positive current collector junction and the negative current collector junction are simultaneously and respectively communicated with the two electrode covers.
7. The heat dissipating cell packaging structure of claim 6, wherein: the electrode structure also comprises an insulating support body connecting the two electrode covers.
8. The heat dissipating cell packaging structure of claim 7, wherein: the insulating support body is connected with the electrode cover in a sealing mode.
9. The heat dissipating cell packaging structure of claim 7, wherein: the electrode cover is covered with the insulating support body, and the insulating support body is hermetically connected with the electrode cover.
10. The heat dissipating cell encapsulation structure of claim 1, wherein: an energy-absorbing element for absorbing the expansion of the lamination units is arranged between two adjacent lamination units or between a lamination unit and the insulating support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120372501.8U CN214099713U (en) | 2021-02-15 | 2021-02-15 | Radiating electric core packaging structure of electrode lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120372501.8U CN214099713U (en) | 2021-02-15 | 2021-02-15 | Radiating electric core packaging structure of electrode lid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214099713U true CN214099713U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120372501.8U Active CN214099713U (en) | 2021-02-15 | 2021-02-15 | Radiating electric core packaging structure of electrode lid |
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| CN (1) | CN214099713U (en) |
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2021
- 2021-02-15 CN CN202120372501.8U patent/CN214099713U/en active Active
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