CN214280064U - Electricity core packaging structure of apron heat dissipation - Google Patents

Electricity core packaging structure of apron heat dissipation Download PDF

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Publication number
CN214280064U
CN214280064U CN202120372502.2U CN202120372502U CN214280064U CN 214280064 U CN214280064 U CN 214280064U CN 202120372502 U CN202120372502 U CN 202120372502U CN 214280064 U CN214280064 U CN 214280064U
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Prior art keywords
current collector
cover plate
collector junction
lamination unit
groove
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CN202120372502.2U
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Chinese (zh)
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林中尉
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Suzhou Amtf Robots Co ltd
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Suzhou Amtf Robots Co ltd
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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
    • 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)

Abstract

This patent provides a radiating electric core packaging structure of apron, 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 apron heat dissipation. The laminated plate comprises at least one laminated unit and at least one cover plate; each laminated unit at least comprises a current collector with one polarity and a composite material, and a current collector junction formed by jointing the current collector extensions of at least one current collector with the same polarity in at least one laminated unit is embedded into a groove on a cover plate.

Description

Electricity core packaging structure of apron heat dissipation
Technical Field
The patent relates to an encapsulation structure of an electric core group consisting of a plurality of electric cores.
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 apron, 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 improve the life cycle and the security of electric core through the apron heat dissipation.
A cover plate heat dissipation battery cell packaging structure comprises at least one lamination unit and at least one cover plate; each laminated unit at least comprises a current collector with one polarity and a composite material, and a current collector junction formed by jointing the current collector extensions of at least one current collector with the same polarity in at least one laminated unit is embedded into a groove on a cover plate.
In the battery cell packaging structure with the cover plate for heat dissipation, the current collectors of the lamination unit comprise the positive current collector and the negative current collector which are opposite; the cover plate is one; 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, or 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 or the negative current collector junction is embedded into the groove on the cover plate.
In the battery cell packaging structure with the cover plate for heat dissipation, the current collectors of the lamination unit comprise the positive current collector and the negative current collector which are opposite; the number of the cover plates is two; 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 embedded into the grooves on the two cover plates respectively at the same time.
The battery cell packaging structure with the radiating cover plate further comprises an insulating connector for connecting the two cover plates. Preferably, the insulation connector is a housing wrapped outside each lamination unit, and the housing is provided with a collapse groove which can be ruptured when the lamination unit expands in volume.
The insulating connector can be any structural member capable of insulating and connecting the two cover plates, and can be an integral member or an assembly member. The connection mode of the cover plate and the insulating connector can be bonding, riveting and the like, and the specific connection mode does not influence the protection scope of the patent claims.
In the battery cell packaging structure with the radiating cover plate, the current collector junction is connected with the cover plate in a conduction mode, and the cover plate made of the conductive material is connected with the insulating connector in a non-conduction mode. Preferably, the current collector junction embedded in the groove is conductively connected with the inner wall of the groove. The current collector confluence part of the embedded groove can be communicated and connected with the inner wall of the groove through a filler or a coating, and also can be communicated and connected in a welding, riveting and other modes, and the specific communicated and connected mode does not influence the protection scope of the patent claims.
In the battery cell packaging structure with the cover plate radiating heat, the groove on the cover plate is formed on the protrusion protruding outwards from the cover plate.
In the battery cell packaging structure with the cover plate radiating, the current collector junction is bent and then embedded into the groove in the plate.
Foretell radiating electric core packaging structure of apron is connected with the conducting strip on the mass flow body confluence of lamination unit, and mass flow body confluence and conducting strip imbed in the recess jointly.
In the battery cell packaging structure with the cover plate for heat dissipation, the cover plate is made of a material with good heat-conducting property.
In the battery cell packaging structure with the cover plate for heat dissipation, one cover plate is cup-shaped and covers most of the lamination units.
The battery cell packaging structure with the heat-dissipating cover plate further comprises a shell wrapped outside each lamination unit, and the shell is connected with the cover plate. The housing may be an aluminum-plastic film or the like.
The beneficial effect of this patent:
this application forms the mass flow body merging part to at least one kind of mass flow extension laminating unit together, imbeds in the recess on the apron, and the heat of lamination unit can be through the quick outside heat dissipation such as mass flow extension, mass flow body merging part, apron, and the radiating effect is good, and the mass flow body merging part that the laminating was in the same place simultaneously conveniently inserts the recess, and production is convenient.
The current collector in a typical cell includes a positive current collector and a negative current collector that are opposite to each other, and the current collector extension in this case may be 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 embedded into a groove on one cover plate, or the positive current collector junction and the negative current collector junction are embedded into grooves on two cover plates simultaneously.
However, some cells are laminated units having only one current collector, such as a solid-state battery cell, which has only a positive current collector and electrolyte is a negative electrode, in this case, the current collector extension is a positive current collector extension formed by extending the positive current collector beyond the cell body, and the current collector junction can only be a positive current collector junction embedded in a groove of a cover plate.
The collapse groove can enable the shell to be cracked at the collapse groove when the laminated unit expands due to various reasons (such as overpressure and overheating) so as to avoid explosion of the laminated unit.
The groove on the cover plate is arranged on the bulge which protrudes outwards from the cover plate, and the cover plate has better radiating effect outwards through the bulge.
When the current collector junction part is connected with the cover plate in a conduction mode, the cover plate at the moment also plays a role of leading out a tab, and the lamination unit can be electrically connected with the outside through the cover plate. Of course, if the positive electrode current collector junction and the negative electrode current collector junction are respectively connected to the two cover plates at the same time, the two cover plates cannot be connected to the insulating connector at the same time.
When the current collector junction part is in conduction connection with the cover plate, in order to reduce the contact resistance between the current collector junction part and the cover plate, the current collector junction part can be in conduction connection with the inner wall of the groove through a filler or a coating.
In order to better transfer heat, the current collector junction part of the lamination unit is connected with a heat conducting sheet, and the current collector junction part and the heat conducting sheet are embedded into the groove together. The cover plate is made of a material with good heat-conducting property, such as a metal material.
Drawings
FIG. 1 is a perspective view of embodiment 1;
FIG. 2 is a front view of embodiment 1;
FIG. 3 is a rear view of FIG. 1;
fig. 4 is a schematic view showing the connection of the cap plate and the junction of the positive current collector in example 1;
FIG. 5 is a schematic view of the casing in embodiment 1;
FIG. 6 is a schematic view of a lamination unit in embodiment 1;
FIG. 7 is a schematic view of a lamination unit in embodiment 2;
FIG. 8 is a schematic view of a lamination unit in embodiment 3;
fig. 9 is a schematic view of a cell encapsulation structure of embodiment 4;
fig. 10 is a schematic view of a cell encapsulation structure of embodiment 5.
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 connector 6, a heat conducting fin 7, a shell 8, a failure groove 81, a cover plate 9, a protrusion 91, a groove 92 and a sheet-shaped lamination unit 100.
Detailed Description
Example 1
Referring to fig. 1-3, the cover plate heat dissipation battery cell packaging structure includes a plurality of sheet lamination units 100 arranged in a row in a thickness direction, a casing 8 made of a non-conductive material and used for packaging each lamination unit, and two cover plates 9 clamped at two ends of the casing and made of a metal material with good electrical and thermal conductivity. The housing 8 is provided with a breakdown groove 81. The housing 8 and the insulating connecting body are the same component.
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.
Each cover plate 9 has a plurality of projections 91 projecting outward, and the inside of the projections 91 is a groove 92.
The positive electrode collector junction part 3 and the negative electrode collector junction part 4 of each lamination unit are respectively in tight fit with the grooves 92 of the two cover plates and are conductively connected. Of course, the positive electrode current collector junction 3 and the negative electrode current collector junction 4 inserted into the grooves may be conductively connected to the inner walls of the grooves 92 by the filler.
Example 2
The main difference between example 2 and example 1 is 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 sheet 7, the positive current collector junction 3 and the heat conducting sheet 7 are embedded into a groove on one cover plate, and the negative current collector junction 4 and the heat conducting sheet 7 are embedded into a groove on the other cover plate.
Example 3
Example 3 differs from example 1 mainly in that: the positive electrode collector junction 3 of each lamination unit 100 is bent and then embedded in a groove of one cover plate, and the negative electrode collector junction 4 of each lamination unit is bent and then embedded in a groove of the other cover plate.
Example 4
Referring to the battery cell packaging structure with a heat dissipating cover plate shown in fig. 9, the main difference from embodiment 1 is that: the laminated units 100 are packaged by aluminum-plastic films 8, the two cover plates 9 are connected by the aluminum-plastic films 8, and no failure groove is formed in the aluminum-plastic films.
Example 5
Referring to the battery cell packaging structure with a heat dissipating cover plate shown in fig. 10, the main difference from embodiment 1 is that: the periphery of the lower cover plate 9 extends upwards to form a cup shape and covers the periphery of most lamination units 100; the main function of the insulating connector 6 is no longer to enclose the housing of the individual lamination units, but to connect the upper and lower cover plates in an insulating manner.
The internal structure of the lamination unit, the electricity storage mechanism, the composition of the composite material, etc. do not affect the scope of protection of the patent claims.
The current collector junction part can be added with a gasket and the like, and can also be folded and then embedded into the cover plate groove.
The housing may be provided with a breach groove which can be ruptured when overpressure occurs inside the lamination unit, so as to prevent the lamination unit from exploding. The specific shape of the housing does not affect the scope of protection of the patent claims.
The number of the lamination units can be one or more.
The lamination unit, outside which the packaging can be provided as required, does not affect the scope of protection of the patent claims.
The housing, which is a housing that does not conduct the two cover plates and has protection and sealing capabilities, may be any plastic that can be used for lamination unit packaging, such as ABS plastic. The housing may be a one-piece member or a combined member, which does not affect the scope of the patent claims.
The cover plate can be made of any conductor material, and the specific material of the cover plate does not influence the protection scope of the patent claims.
The connection between the housing and the cover plate may be made by gluing, riveting, welding, etc., without affecting the scope of protection of the patent claims.
Additional structures on the cover plate, connecting insulators for the application of the encapsulated lamination unit, such as: connecting electrodes, fixing lugs, safety valves, etc., without affecting the scope of protection of the patent claims.
Whether the lamination unit has a package or not, a packaging structure, a specific structure of the current collector extension part and the like do not influence the protection scope of the patent claims.
The novel structure has excellent manufacturability, can greatly reduce the production cost of the lamination unit, has simple and reliable process, changes the traditional structure and production process of the lamination unit, and has very important practical significance on the development and popularization of the electricity storage device.

Claims (10)

1. A cover plate heat dissipation battery cell packaging structure comprises at least one lamination unit and at least one cover plate; 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 the current collector extensions of at least one current collector of the same polarity in at least one lamination unit being fitted together is fitted into the groove of one cover plate.
2. The cover plate heat dissipating cell encapsulation structure of claim 1, wherein: the current collectors of the laminated unit include opposing positive and negative current collectors; the cover plate is one; 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, or 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 or the negative current collector junction is embedded into the groove on the cover plate.
3. The cover plate 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 cover plates is two; 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 embedded into the grooves on the two cover plates respectively at the same time.
4. The cover plate heat dissipation cell encapsulation structure of claim 3, characterized in that: the insulating connecting body is connected with the two cover plates.
5. The cover plate heat dissipation cell encapsulation structure of claim 4, characterized in that: the insulating connector is a shell wrapped outside each lamination unit, and a collapsing groove which can be split when the lamination unit expands in volume is formed in the shell.
6. The cover plate heat dissipation cell encapsulation structure of claim 3, characterized in that: the current collector junction is connected with the cover plate in a conduction mode, and the cover plate made of conducting materials is connected with the insulating connector in a non-conduction mode.
7. The cover plate heat dissipation cell encapsulation structure of claim 6, characterized in that: the current collector confluence part embedded into the groove is communicated and connected with the inner wall of the groove.
8. The cover plate heat dissipating cell encapsulation structure of claim 1, wherein: the current collector junction of the lamination unit is connected with a heat conducting sheet, and the current collector junction and the heat conducting sheet are embedded into the groove together.
9. The cover plate heat dissipating cell encapsulation structure of claim 1, wherein: a cover plate is cup-shaped and covers most of the lamination units.
10. The cover plate heat dissipating cell encapsulation structure of claim 1, wherein: the laminated plate unit further comprises a shell wrapped outside each laminated unit, and the shell is connected with the cover plate.
CN202120372502.2U 2021-02-15 2021-02-15 Electricity core packaging structure of apron heat dissipation Active CN214280064U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120372502.2U CN214280064U (en) 2021-02-15 2021-02-15 Electricity core packaging structure of apron heat dissipation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120372502.2U CN214280064U (en) 2021-02-15 2021-02-15 Electricity core packaging structure of apron heat dissipation

Publications (1)

Publication Number Publication Date
CN214280064U true CN214280064U (en) 2021-09-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120372502.2U Active CN214280064U (en) 2021-02-15 2021-02-15 Electricity core packaging structure of apron heat dissipation

Country Status (1)

Country Link
CN (1) CN214280064U (en)

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