CN210805955U - Single battery, battery pack and vehicle - Google Patents
Single battery, battery pack and vehicle Download PDFInfo
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- CN210805955U CN210805955U CN201921577167.9U CN201921577167U CN210805955U CN 210805955 U CN210805955 U CN 210805955U CN 201921577167 U CN201921577167 U CN 201921577167U CN 210805955 U CN210805955 U CN 210805955U
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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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Abstract
The utility model discloses a battery cell, battery package and vehicle, battery cell includes: a battery body; the heat conducting sheet is attached to the outer surface of the battery body; and the insulating film is arranged on the outer side of the heat conducting sheet and at least wraps the heat conducting sheet. According to the utility model discloses single cell can improve heat transfer samming efficiency, reduces the uneven negative effects to performance and life-span production of surface temperature distribution, and the universality is high.
Description
Technical Field
The utility model belongs to the technical field of the battery technique and specifically relates to a battery cell, have battery cell's battery package with have the vehicle of battery package.
Background
For the cooling system of the battery pack, cooling is performed only at the bottom of the unit battery due to structural limitations. During the charging and discharging processes, the temperature of the top of the single battery (i.e. the end close to the electrode) is higher, and the temperature of the bottom of the single battery is lower, so that the single battery forms a larger temperature gradient in the height direction of the single battery, and the uneven surface temperature distribution can have negative effects on the working performance and the service life of the battery.
For example, an aluminum plate or an ultra-high heat conduction material and an insulating heat conduction material are added in the battery pack, wherein the aluminum plate or the ultra-high heat conduction material is arranged between the single batteries, the insulating heat conduction material is arranged between the aluminum plate or the ultra-high heat conduction material and the single batteries, the thermal resistance between the aluminum plate or the ultra-high heat conduction material and the single batteries is large, the uniform heat transfer efficiency and the uniform temperature effect are influenced, and due to the fact that the temperature equalization design is carried out on the whole battery pack, the number of limiting factors is large, and the universality is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a single battery, which can improve the heat transfer temperature equalization efficiency, reduce the negative effect of uneven surface temperature distribution on performance and life, and has high universality.
The utility model also provides a battery package that has above-mentioned battery cell.
The utility model discloses still provide a vehicle that has above-mentioned battery package.
To achieve the above object, an embodiment according to a first aspect of the present invention provides a battery cell, including: a battery body; the heat conducting sheet is attached to the outer surface of the battery body; and the insulating film is arranged on the outer side of the heat conducting sheet and at least wraps the heat conducting sheet.
According to the utility model discloses battery cell establishes the conducting strip through pasting at battery body surface, and the conducting strip has good heat conductivility, has increased battery body's heat transfer route, has improved battery cell's heat transfer efficiency, has reduced battery body's temperature gradient, makes battery cell surface temperature distribute evenly, and then has improved battery cell's stability performance and life. In addition, the single battery is subjected to independent temperature equalization structural design, so that the structural limitation of the battery pack is avoided, the single battery can be applied to different battery packs, and the universality is higher.
According to the utility model discloses single cell can improve heat transfer samming efficiency, reduces the uneven negative effects to performance and life-span production of surface temperature distribution, and the universality is high.
In addition, the single battery according to the embodiment of the present invention may also have the following additional technical features:
according to some embodiments of the present invention, the outer surface of the battery body comprises: the electrode structure comprises a top surface and a bottom surface, wherein the top surface and the bottom surface are oppositely arranged, and the top surface is provided with an electrode; a side surface surrounding between the top surface and the bottom surface; wherein, the heat conduction slice is attached to the side surface.
Further, the heat conductive sheet covers the entire side surface in a direction from the top surface to the bottom surface.
According to some embodiments of the present invention, the side surfaces include a first side surface, a second side surface, a third side surface, and a fourth side surface which are sequentially terminated in a circumferential direction of the battery body; the heat conducting fins comprise a first side heat conducting fin, a second side heat conducting fin, a third side heat conducting fin and a fourth side heat conducting fin, wherein the first side heat conducting fin is attached to the first side surface, the second side heat conducting fin is attached to the second side surface, the third side heat conducting fin is attached to the third side surface, and the fourth side heat conducting fin is attached to the fourth side surface.
Further, the first side heat-conducting fin, the second side heat-conducting fin, the third side heat-conducting fin and the fourth side heat-conducting fin are integrally formed or separately arranged.
According to some embodiments of the present invention, the insulating film includes a side wall, the side wall covers the first side heat-conducting strip, the second side heat-conducting strip, the third side heat-conducting strip and the fourth side heat-conducting strip.
Further, the insulating film further includes a bottom enclosure that surrounds a bottom surface of the battery body; the side wall and the bottom wall are integrally formed.
According to some embodiments of the present invention, the surface of the heat-conducting sheet facing the battery body is coated with a heat-conducting adhesive layer.
According to the utility model discloses an embodiment of second aspect provides a battery package, according to the utility model discloses a battery package includes according to the embodiment of the first aspect the battery cell.
According to the utility model discloses battery package has advantages such as temperature distribution is even, stable performance and long service life.
According to the utility model discloses an embodiment of third aspect provides a vehicle, according to the utility model discloses a vehicle includes according to the embodiment of the second aspect battery package.
According to the utility model discloses the vehicle has advantages such as stable performance and long service life.
Drawings
The above advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is an exploded view of a unit cell according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a heat conductive sheet of a single cell according to an embodiment of the present invention.
Fig. 3 is a temperature equalization schematic diagram of a single battery according to an embodiment of the present invention.
Reference numerals:
a single battery 1,
A battery body 100, a top surface 110, a bottom surface 120, electrodes 111, side surfaces 130, a first side surface 131, a second side surface 132, a third side surface 133, a fourth side surface 134,
A heat conductive sheet 200, a first side heat conductive sheet 210, a second side heat conductive sheet 220, a third side heat conductive sheet 230, a fourth side heat conductive sheet 240, a heat conductive adhesive layer 250,
Insulating film 300, side wall 310, bottom wall 320.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "thickness", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, "a plurality" means two or more, and "a plurality" means one or more.
The unit battery 1 according to the embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1, the unit cell 1 includes a cell body 100, a heat conductive sheet 200, and an insulating film 300.
The heat conductive sheet 200 is attached to the outer surface of the battery body 100. The insulating film 300 is provided outside the heat conductive sheet 200 and covers at least the heat conductive sheet 200.
For example, the single battery 1 may be a rectangular battery, a pouch battery, or a cylindrical battery, and fig. 1 illustrates an example in which the single battery 1 is a rectangular battery. The insulating film 300 covers at least the thermally conductive sheet 200, that is, the thermally conductive sheet 200 may cover only the thermally conductive sheet 200, or may cover the thermally conductive sheet 200 and the battery body 100. The heat conducting sheet 200 may be made of a material with ultra-high thermal conductivity, such as an artificial graphite sheet, so as to facilitate light weight and increase energy density, and the insulating film 300 may be a PET tape (i.e., a polyester tape).
According to the utility model discloses battery cell 1 establishes conducting strip 200 through pasting at battery body 100 external surface, and conducting strip 200 has good heat conductivility, has increased battery body 100's heat transfer route, has improved battery cell 1's heat transfer efficiency, has reduced battery body 100's temperature gradient, makes battery cell 1 surface temperature distribute evenly, and then has improved battery cell 1's stability of performance and life. Compare among the correlation technique scheme of carrying out the samming to the battery package, conducting strip 200 and battery body 100 direct contact, the thermal resistance between the two is less, can improve heat transfer samming efficiency, and adopts insulating film 300 cladding conducting strip 200, and insulating effectual has effectively solved insulating and damping problem to have the moisture safeguard function.
Furthermore, in the embodiment of the utility model provides an in, carry out solitary samming structural design to battery cell 1, consequently not restricted by the structure of battery package, battery cell 1 can be applied to in the battery package of difference, and the universality is higher, and compares the holistic samming structure of battery package, the utility model provides an in weight and cost of battery cell 1 lower.
So, according to the utility model discloses single cell 1 can improve heat transfer samming efficiency, reduces the uneven negative effect to performance and life-span production of surface temperature distribution, and the universality is high.
According to some embodiments of the present invention, as shown in fig. 1, the outer surface of the battery body 100 includes a top surface 110, a bottom surface 120, and a side surface 130.
The top surface 110 and the bottom surface 120 are oppositely disposed, the top surface 110 is provided with an electrode 111, and the side surface 130 surrounds between the top surface 110 and the bottom surface 120. Wherein, the heat conducting sheet 200 is attached to the side surface 130.
Specifically, the top surface 110 and the bottom surface 120 are parallel to each other. The side surfaces 130 intersect the top surface 110 and the bottom surface 120, and the side surfaces 130 are circumferentially closed in the circumferential direction of the unit cell 1. At least the top surface 110 of the outer surfaces of the unit cells 1 is not covered with the insulating film 300 to expose the electrodes 111, and the electrodes 111 may protrude from the top surface 110. Thus, the heat conductive sheet 200 performs heat transfer and temperature equalization on the side surface 130 of the battery body 100, thereby reducing the temperature gradient in the height direction of the battery body 100.
Further, as shown in fig. 1, the heat conductive sheet 200 covers the entire side surface 130 in the direction from the top surface 110 to the bottom surface 120. Thus, the whole side surface 130 of the single battery 1 obtains uniform heat transfer, the temperature of the side surface 130 of the single battery 1 is more uniform from the top surface 110 to the bottom surface 120, the temperature gradient is further reduced, and the performance stability and the service life of the single battery 1 are further improved.
According to some embodiments of the present invention, as shown in fig. 1, the side surface 130 includes a first side surface 131, a second side surface 132, a third side surface 133 and a fourth side surface 134 which are sequentially connected in an end-to-end manner along the circumferential direction of the unit battery 1.
The heat conducting sheet 200 includes a first side heat conducting sheet 210, a second side heat conducting sheet 220, a third side heat conducting sheet 230, and a fourth side heat conducting sheet 240, wherein the first side heat conducting sheet 210 is attached to the first side surface 131, the second side heat conducting sheet 220 is attached to the second side surface 132, the third side heat conducting sheet 230 is attached to the third side surface 133, and the fourth side heat conducting sheet 240 is attached to the fourth side surface 134.
For example, the battery body 100 is rectangular, and four side surfaces 130 (i.e., the first side surface 131, the second side surface 132, the third side surface 133, and the fourth side surface 134) of the battery body 100 respectively conduct heat transfer and temperature equalization on one heat-conducting fin 200 (i.e., the first side heat-conducting fin 210, the second side heat-conducting fin 220, the third side heat-conducting fin 230, and the fourth side heat-conducting fin 240), so that the entire side surface 130 of the battery body 100 has a good heat transfer and temperature equalization effect.
It will be understood by those skilled in the art that the present invention is not limited to the shape of the battery body 100, the battery body 100 may be a square battery, or may be a battery with other shapes, for the battery with other shapes, the heat conducting sheet 200 is configured to be correspondingly matched to be attached to the side surface 130, and the number of the heat conducting sheets 200 may be increased or decreased according to actual requirements.
The first side heat-conducting strip 210, the second side heat-conducting strip 220, the third side heat-conducting strip 230 and the fourth side heat-conducting strip 240 are integrally formed or separately disposed.
According to some embodiments of the present invention, as shown in fig. 1, the insulating film 300 includes a side wall 310, and the side wall 310 covers the first side heat-conducting strip 210, the second side heat-conducting strip 220, the third side heat-conducting strip 230, and the fourth side heat-conducting strip 240, so as to insulate the covering of the heat-conducting strip 200 and avoid the occurrence of the electric leakage.
Further, the insulating film 300 further includes a bottom enclosure 320, and the bottom enclosure 320 encloses the bottom surface of the battery body 100, thereby insulating the whole structure, further improving the insulating effect, and enabling the single battery 1 to form a structurally stable whole.
Wherein, side wall 310 and end wall 320 integrated into one piece have improved the insulating effect to holistic on the one hand, and on the other hand has improved single cell 1 overall structure's stability, and the assembly is more convenient.
According to some embodiments of the present invention, as shown in fig. 2, the surface of the heat conductive sheet 200 facing the battery body 100 is coated with a heat conductive adhesive layer 250.
Thus, the thermal conductive adhesive layer 250 can ensure that the thermal conductive sheet 200 and the battery body 100 are well bonded, and increase in thermal resistance of the battery body 100 and the thermal conductive sheet 200 due to poor bonding is avoided.
The technical principle of temperature equalization of the single cell 1 is illustrated below with reference to fig. 3:
when the battery body 100 is operated, the temperature of a local position of the battery body 100 (for example, the electrode 111 near the top surface 110) is rapidly increased, the local position of the battery body 100 forms a temperature difference with other low-temperature positions of the battery body 100, and heat is spontaneously transferred from the high-temperature position to the low-temperature position. After the heat conductive sheet 200 is added, heat transfer forms two transfer paths:
on the one hand, heat is diffused from a high temperature position to other low temperature positions of the battery body 100 through the battery body 100, i.e., a first transfer path;
on the other hand, heat at a high temperature position can be rapidly transferred to the thermally conductive sheet 200 by heat exchange between the battery body 100 and the thermally conductive sheet 200, and then rapidly diffused to each low temperature position of the battery body 100, i.e., the second transfer path, via the thermally conductive sheet 200.
When the heat conducting sheet 200 is not added, heat is transferred only through the first transfer path, and in the prior art, the thermal conductivity in the height direction of the battery body is 25w/m.k, the thermal conductivity in the length direction of the battery body is 25w/m.k, the thermal conductivity in the width direction of the battery body is 5w/m.k, and the transfer speed is slow. After the heat conducting sheet 200 is loaded, a second transmission path is formed, the heat conducting sheet 200 has ultrahigh heat conductivity, (for example, the heat conducting sheet 200 is made of artificial graphite flakes, and the plane heat conductivity of the artificial graphite flakes can reach 1500w/m.k), heat can be rapidly transmitted through the second transmission path, the temperature equalizing time is shortened, and the temperature equalizing effect is improved.
According to the utility model discloses the implementation still provides a battery package, the battery package includes according to the utility model discloses above-mentioned embodiment's battery cell 1.
According to the utility model discloses the battery package of implementing, through utilizing according to the utility model discloses above-mentioned embodiment's battery cell 1 has advantages such as temperature distribution is even, stable performance and long service life.
According to the utility model discloses the implementation still provides a vehicle, and this vehicle can be the electric motor car, the vehicle includes according to the utility model discloses above-mentioned embodiment's battery package.
According to the utility model discloses the vehicle of implementing, through utilizing according to the utility model discloses above-mentioned embodiment's battery package has advantages such as stable performance and long service life.
Other configurations of vehicles according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "particular embodiment," "particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery cell, comprising:
a battery body;
the heat conducting sheet is attached to the outer surface of the battery body;
and the insulating film is arranged on the outer side of the heat conducting sheet and at least wraps the heat conducting sheet.
2. The cell defined in claim 1, wherein the outer surface of the battery body comprises:
the electrode structure comprises a top surface and a bottom surface, wherein the top surface and the bottom surface are oppositely arranged, and the top surface is provided with an electrode;
a side surface surrounding between the top surface and the bottom surface;
wherein, the heat conduction slice is attached to the side surface.
3. The battery cell according to claim 2, wherein the heat conductive sheet covers the entire side surface in a direction from the top surface to the bottom surface.
4. The single battery according to claim 2, wherein the side surfaces include a first side surface, a second side surface, a third side surface, and a fourth side surface which are sequentially endlessly connected in a circumferential direction of the battery body;
the heat conducting fins comprise a first side heat conducting fin, a second side heat conducting fin, a third side heat conducting fin and a fourth side heat conducting fin, wherein the first side heat conducting fin is attached to the first side surface, the second side heat conducting fin is attached to the second side surface, the third side heat conducting fin is attached to the third side surface, and the fourth side heat conducting fin is attached to the fourth side surface.
5. The unit cell according to claim 4, wherein the first side heat-conducting sheet, the second side heat-conducting sheet, the third side heat-conducting sheet, and the fourth side heat-conducting sheet are integrally formed or separately provided.
6. The unit cell according to claim 4, wherein the insulating film includes side walls that cover the first side heat conductive sheet, the second side heat conductive sheet, the third side heat conductive sheet, and the fourth side heat conductive sheet.
7. The cell defined in claim 6, wherein the insulating film further comprises a bottom skirt that surrounds a bottom surface of the battery body;
the side wall and the bottom wall are integrally formed.
8. The battery cell according to any one of claims 1 to 7, wherein a surface of the thermally conductive sheet facing the battery body is coated with a thermally conductive adhesive layer.
9. A battery pack comprising a plurality of the unit batteries according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the battery pack according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921577167.9U CN210805955U (en) | 2019-09-20 | 2019-09-20 | Single battery, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921577167.9U CN210805955U (en) | 2019-09-20 | 2019-09-20 | Single battery, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210805955U true CN210805955U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921577167.9U Active CN210805955U (en) | 2019-09-20 | 2019-09-20 | Single battery, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210805955U (en) |
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2019
- 2019-09-20 CN CN201921577167.9U patent/CN210805955U/en active Active
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