CN219371135U - Battery pack - Google Patents
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- CN219371135U CN219371135U CN202320775830.6U CN202320775830U CN219371135U CN 219371135 U CN219371135 U CN 219371135U CN 202320775830 U CN202320775830 U CN 202320775830U CN 219371135 U CN219371135 U CN 219371135U
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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 relates to the technical field of batteries, and provides a battery pack, which comprises: a first cylindrical battery; a second cylindrical battery; a third cylindrical battery; the heat exchange structure is characterized in that the first cylindrical battery and the second cylindrical battery are positioned on the first side, the third cylindrical battery is positioned on the second side, along the second direction perpendicular to the first direction, the third cylindrical battery is overlapped with the orthographic projection part of the first cylindrical battery on the same plane, and the orthographic projection part of the third cylindrical battery and the second cylindrical battery on the same plane are overlapped, wherein an included angle between the first plane and the second plane is a, the included angle is less than or equal to 30 degrees and less than or equal to 120 degrees, the first cylindrical battery, the second cylindrical battery and the third cylindrical battery can be ensured to have reliable heat exchange contact areas with the heat exchange structure, the heat exchange rate of the battery pack is ensured, and the uniform heat exchange of the heat exchange structure is ensured, so that the safe use performance of the battery pack is reliably improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery pack.
Background
In the related art, the battery pack may include a plurality of batteries, and the batteries generate a lot of heat during the use of the battery pack, and in the related art, the batteries are mostly cooled by the cooling plate, however, due to the limitation of the arrangement mode of the internal structure of the battery pack, the heat dissipation capability of the battery pack may be affected.
Disclosure of Invention
The utility model provides a battery pack to improve the performance of the battery pack.
The present utility model provides a battery pack including:
a first cylindrical battery having a first centerline;
a second cylindrical battery having a second center line, the first cylindrical battery and the second cylindrical battery being arranged in a first direction;
a third cylindrical cell having a third centerline;
the heat exchange structure is provided with a first side and a second side which are oppositely arranged, the first cylindrical battery and the second cylindrical battery are positioned on the first side, the third cylindrical battery is positioned on the second side, the third cylindrical battery is overlapped with the orthographic projection part of the first cylindrical battery facing the same plane along the second direction perpendicular to the first direction, the orthographic projection part of the third cylindrical battery and the second cylindrical battery facing the same plane is overlapped, and the second direction is perpendicular to the plane where the first central line and the second central line are positioned;
the first central line and the third central line are positioned on a first plane, the second central line and the third central line are positioned on a second plane, and an included angle between the first plane and the second plane is a, and a is more than or equal to 30 degrees and less than or equal to 120 degrees.
The battery pack of one embodiment of the utility model comprises a first cylindrical battery, a second cylindrical battery, a third cylindrical battery and a heat exchange structure, wherein the first cylindrical battery and the second cylindrical battery are positioned on a first side of the heat exchange structure. The third cylindrical battery is located at the second side of the heat exchange structure, so that the heat exchange structure is located among the first cylindrical battery, the second cylindrical battery and the third cylindrical battery, and reliable heat dissipation of the first cylindrical battery, the second cylindrical battery and the third cylindrical battery is formed. Along the second direction, the third cylindrical battery coincides with the orthographic projection part of the first cylindrical battery facing the same plane, and the third cylindrical battery coincides with the orthographic projection part of the second cylindrical battery facing the same plane, so that the space utilization rate of the battery pack can be improved, and the first cylindrical battery, the second cylindrical battery and the third cylindrical battery can be conveniently grouped. The first central line of the first cylindrical battery and the third central line of the third cylindrical battery form a first plane, the second central line of the second cylindrical battery and the third central line of the third cylindrical battery form a second plane, and an included angle between the first plane and the second plane is a, is more than or equal to 30 degrees and less than or equal to 120 degrees, so that the first cylindrical battery, the second cylindrical battery and the third cylindrical battery can be ensured to have reliable heat exchange contact areas with a heat exchange structure, the heat exchange rate of a battery pack is ensured, and uniform heat exchange of the heat exchange structure is ensured, thereby reliably improving the safe use performance of the battery pack.
Drawings
For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.
Wherein:
fig. 1 is a schematic view illustrating a structure of a view of a battery pack according to an exemplary embodiment;
fig. 2 is a schematic structural view illustrating another view of a battery pack according to an exemplary embodiment.
The reference numerals are explained as follows:
1. a first plane; 2. a second plane; 3. a third plane; 10. a first cylindrical battery; 11. a first centerline; 20. a second cylindrical battery; 21. a second centerline; 30. a third cylindrical battery; 31. a third centerline; 40. a heat exchange structure; 41. a first side; 411. a first recess; 412. a second recess; 42. a second side; 421. a third recess; 50. a fourth cylindrical battery; 51. and a fourth centerline.
Detailed Description
The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.
In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.
Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.
Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.
An embodiment of the present utility model provides a battery pack, referring to fig. 1 and 2, the battery pack includes: a first cylindrical battery 10, the first cylindrical battery 10 having a first centerline 11; a second cylindrical battery 20, the second cylindrical battery 20 having a second center line 21, the first cylindrical battery 10 and the second cylindrical battery 20 being arranged in the first direction; a third cylindrical battery 30, the third cylindrical battery 30 having a third centerline 31; the heat exchange structure 40, the heat exchange structure 40 has a first side 41 and a second side 42 which are oppositely arranged, the first cylindrical battery 10 and the second cylindrical battery 20 are positioned on the first side 41, the third cylindrical battery 30 is positioned on the second side 42, along a second direction perpendicular to the first direction, the third cylindrical battery 30 coincides with a orthographic projection part of the first cylindrical battery 10 on the same plane, and the third cylindrical battery 30 coincides with a orthographic projection part of the second cylindrical battery 20 on the same plane, and the second direction is perpendicular to the plane on which the first central line 11 and the second central line 21 are positioned; wherein the first central line 11 and the third central line 31 are positioned on the first plane 1, the second central line 21 and the third central line 31 are positioned on the second plane 2, and the included angle between the first plane 1 and the second plane 2 is a, and a is more than or equal to 30 degrees and less than or equal to 120 degrees.
The battery pack of one embodiment of the present utility model includes a first cylindrical battery 10, a second cylindrical battery 20, a third cylindrical battery 30, and a heat exchange structure 40, the first cylindrical battery 10 and the second cylindrical battery 20 being located at a first side 41 of the heat exchange structure 40. The third cylindrical battery 30 is located on the second side 42 of the heat exchanging structure 40 such that the heat exchanging structure 40 can be located between the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30, resulting in a reliable heat exchange of the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30. Along the second direction, the third cylindrical battery 30 coincides with the orthographic projection part of the first cylindrical battery 10 facing the same plane, and the third cylindrical battery 30 coincides with the orthographic projection part of the second cylindrical battery 20 facing the same plane, so that the space utilization rate of the battery pack can be improved, and the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are conveniently grouped. The first central line 11 of the first cylindrical battery 10 and the third central line 31 of the third cylindrical battery 30 form a first plane 1, the second central line 21 of the second cylindrical battery 20 and the third central line 31 of the third cylindrical battery 30 form a second plane 2, and the included angle between the first plane 1 and the second plane 2 is a, which is more than or equal to 30 degrees and less than or equal to 120 degrees, so that the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 can have reliable heat exchange contact areas with the heat exchange structure 40, the heat exchange rate of the battery pack is ensured, the uniform heat exchange of the heat exchange structure 40 is ensured, and the safe use performance of the battery pack is reliably improved.
It should be noted that, the first cylindrical battery 10 has a first center line 11, the second cylindrical battery 20 has a second center line 21, and the third cylindrical battery 30 has a third center line 31, that is, the cylindrical batteries each have a center line, as shown in fig. 2, the first center line 11, the second center line 21, and the third center line 31 are indicated at the vertex positions, the first center line 11 and the third center line 31 are located on the first plane 1, the first plane 1 is shown by a dashed line, the second center line 21 and the third center line 31 are located on the second plane 2, and the second plane 2 is also shown by a dashed line. For example, taking the first cylindrical battery 10 as an example with the first center line 11, that is, the center line of the first cylindrical battery 10 is the first center line 11 of the first cylindrical battery 10, further, the first cylindrical battery 10 has an end surface, the end surface is a round surface, and the first center line 11 passes through the center of the round surface and is perpendicular to the round surface.
The first centre line 11 and the third centre line 31 lie on a first plane 1, the first plane 1 in fig. 1 and 2 being represented by the line connecting the first centre line 11 and the third centre line 31, the second centre line 21 and the third centre line 31 lying on a second plane 2, the second plane 2 in fig. 1 and 2 being represented by the line connecting the second centre line 21 and the third centre line 31.
The heat exchanging structure 40 has a first side 41 and a second side 42 arranged opposite to each other, i.e. the opposite large surfaces of the heat exchanging structure 40 may be denoted as first side 41 and second side 42, respectively, the first side 41 and the second side 42 may be planar, curved or a combination of planar and curved surfaces. The first cylindrical battery 10 and the second cylindrical battery 20 are arranged in a first direction and are located at a first side 41 such that the first cylindrical battery 10 and the second cylindrical battery 20 are in heat exchanging contact with the heat exchanging structure 40. The third cylindrical battery 30 is positioned on the second side 42 such that the third cylindrical battery 30 is in heat exchanging contact with the heat exchanging structure 40.
The first and second cylindrical batteries 10 and 20 may be in direct contact with the heat exchange structure 40, or the first and second cylindrical batteries 10 and 20 may be in indirect contact with the heat exchange structure 40; the third cylindrical battery 30 may be in direct contact with the heat exchange structure 40, or the third cylindrical battery 30 may be in indirect contact with the heat exchange structure 40. The first and second cylindrical batteries 10 and 20 may be in insulating contact with the heat exchange structure 40, and the third cylindrical battery 30 may be in insulating contact with the heat exchange structure 40, for example, an insulating film may be provided between the first and second cylindrical batteries 10 and 20 and the heat exchange structure 40, and an insulating film may be provided between the third cylindrical battery 30 and the heat exchange structure 40.
Along the second direction perpendicular to the first direction, the third cylindrical battery 30 coincides with the orthographic projection part of the first cylindrical battery 10 facing the same plane, and the third cylindrical battery 30 coincides with the orthographic projection part of the second cylindrical battery 20 facing the same plane, that is, the space between the first cylindrical battery 10 and the second cylindrical battery 20 is not too large, thereby ensuring the space utilization rate of the battery pack, and the heat exchange structure 40 can reasonably utilize the gap formed by the first cylindrical battery 10 and the second cylindrical battery 20, thereby reasonably distributing each structure of the battery pack.
As shown in connection with fig. 2, the first direction is denoted X, the second direction is denoted Y, the first direction is perpendicular to the second direction, and the second direction is perpendicular to the plane in which the first centerline 11 and the second centerline 21 lie.
As shown in fig. 2, the first center line 11 and the third center line 31 are located on the first plane 1, the second center line 21 and the third center line 31 are located on the second plane 2, the included angle between the first plane 1 and the second plane 2 is a, a is not less than 30 degrees and not more than 120 degrees, that is, the heat exchanging contact angle a formed among the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 ranges from 30 degrees to 120 degrees. The undersize heat exchange contact angle makes the contact area between each cylindrical battery and the heat exchange structure 40 too small, influences the whole heat exchange rate of group battery, has reduced group battery fast charge performance. The heat exchange contact angle is too large, the bending degree of the heat exchange structure 40 is correspondingly increased, so that the flow resistance of the heat exchange medium in the heat exchange structure 40 at the bending position is correspondingly increased, the local heat generation of the battery is serious, the internal safety risk of the battery pack is caused, and the insulating film at the bending position of the heat exchange structure 40 is caused to have a failure risk due to the too large bending degree.
In one embodiment, the included angle between the first plane 1 and the second plane 2 is a, and a is more than or equal to 45 degrees and less than or equal to 70 degrees, so that a reasonable range of heat exchange contact angles formed among the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 can be ensured, the heat exchange structure 40 can be ensured to reliably realize heat exchange on the battery pack, the safety performance of the battery pack is improved, and the battery pack is convenient to realize quick charge.
In one embodiment, the angle a between the first plane 1 and the second plane 2 may be 30 °, 32 °, 33 °, 35 °, 40 °, 42 °, 43 °,45 °, 46 °, 48 °, 50 °, 52 °, 53 °, 55 °, 58 °, 59 °, 60 °, 61 °, 62 °, 63 °, 65 °, 70 °, 72 °, 73 °, 75 °, 80 °, 82 °, 83 °, 85 °, 90 °, 92 °, 93 °, 95 °, 96 °, 98 °, 100 °, 105 °, 110 °, 115 °, 120 °, etc.
In one embodiment, the heat exchange structure 40 includes a bent plate, and the inside of the bent plate is used for circulating heat exchange medium, so that the heat exchange structure 40 can form a good fit with the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30, and the heat exchange structure 40 can be ensured to realize efficient heat exchange for the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30, so that the safety service performance of the battery pack is improved. The heat exchange structure 40 may be connected to the pipe structure, so that the pipe structure may convey the heat exchange medium, and the heat exchange medium may circulate in the heat exchange structure 40.
The heat exchange structure 40 is internally provided with a channel for circulating heat exchange medium, and the heat exchange structure 40 comprises a bent plate, so that an included angle between the first plane 1 and the second plane 2 is 30-120 degrees, the problem that the flow resistance of the heat exchange medium at the bent position is large when the bending degree of the heat exchange structure 40 is overlarge is avoided, and the problem that local heat generation of a battery is serious can be avoided, and the safety use performance of the battery pack is reliably improved.
In one embodiment, the diameters of the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are all equal to or larger than 35mm, that is, the diameters of the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are relatively larger, so that the problem of more heat generation occurs, therefore, the heat exchange requirement of the heat exchange structure 40 can be effectively met by enabling the included angle between the first plane 1 and the second plane 2 to be 30-120 degrees, and the heat exchange structure 40 is ensured to reliably realize the heat exchange of the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30.
The diameters of the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are not less than 35mm, the corresponding heat generation of the large-size battery is serious, and the heat exchange structure 40 has higher requirements on the flow resistance and the heat exchange efficiency of the heat exchange medium, so that the heat exchange efficiency can be considered, and the problem that the bending degree of the heat exchange structure 40 is overlarge can be avoided. For example, the diameters of the first, second, and third cylindrical batteries 10, 20, and 30 may be 35mm, 38mm, 40mm, 45mm, 50mm, 55mm, or 60mm, etc.
In one embodiment, the radii of the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are r,0.5 °/mm is less than or equal to a/r is less than or equal to 10 °/mm, on the basis of ensuring that the heat exchange structure 40 occupies a reasonable space range, the battery pack is ensured to have a reasonable space utilization rate, and the heat exchange capability of the heat exchange structure 40 to the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 can be ensured, thereby ensuring the charge and discharge rate of the battery pack.
When the ratio of the included angle a between the first plane 1 and the second plane 2 to the radius r of the cylindrical battery is too large, the heat exchange structure 40 occupies a larger size of the battery space, and the heat exchange rate of the cylindrical battery with a small diameter is too fast, which causes cost waste of the heat exchange structure 40. When the ratio of the included angle a between the first plane 1 and the second plane 2 to the radius r of the cylindrical battery is too small, the heat exchange requirement of the cylindrical battery with the large diameter is larger, however, the heat exchange contact angle is too small, so that the heat exchange area of the cylindrical battery is correspondingly reduced, and the charge and discharge rate of the cylindrical battery is reduced.
The ratio of the angle a between the first plane 1 and the second plane 2 to the radius average r of the cylindrical cell may be 0.5 °/mm, 0.8 °/mm, 1 °/mm, 1.2 °/mm, 1.5 °/mm, 1.8 °/mm, 2 °/mm, 2.2 °/mm, 2.5 °/mm, 2.8 °/mm, 3 °/mm, 3.2 °/mm, 3.5 °/mm, 3.8 °/mm, 4 °/mm, 4.2 °/mm, 4.5 °/mm, 4.8 °/mm, or 5 °/mm, etc.
In one embodiment, the thickness of the heat exchange structure 40 is 2mm-6mm along the second direction, so that the space utilization and the energy density of the battery pack are prevented from being influenced due to the excessive thickness of the heat exchange structure 40 on the basis of ensuring the heat exchange capability of the heat exchange structure 40.
As shown in connection with fig. 1, the thickness of the heat exchange structure 40 may be denoted b. When the thickness b of the heat exchange structure 40 is smaller than 2mm, the heat exchange structure 40 is difficult to bend and has poor heat exchange rate due to the fact that the thickness b of the heat exchange structure 40 is too small, and the heat exchange efficiency of the large-diameter cylindrical battery is increased, so that compared with the small-diameter cylindrical battery, the thickness of the heat exchange plate is required to be increased; and when the thickness of the heat exchange structure 40 is greater than 6mm, the overall space utilization rate of the battery pack is lower due to the excessive thickness of the heat exchange structure 40, which is not beneficial to improving the energy density of the battery pack.
The thickness of the heat exchange structure 40 may be 2mm, 2.2mm, 2.3mm, 2.5mm, 2.8mm, 2.9mm, 3mm, 3.2mm, 3.3mm, 3.5mm, 3.8mm, 3.9mm, 4mm, 4.2mm, 4.3mm, 4.5mm, 4.8mm, 4.9mm, 5mm, 5.2mm, 5.3mm, 5.5mm, 5.8mm, 5.9mm, or 6mm, etc.
In one embodiment, the thickness of the heat exchange structure 40 is b, the radii of the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are r, and r/b is 2-20 along the second direction, so that the radii of the cylindrical batteries are adapted to the thickness of the heat exchange structure 40, and the space utilization of the battery pack can be ensured on the basis of ensuring the heat exchange capability.
The ratio between the radius r of the cylindrical cell and the thickness b of the heat exchanging structure 40 may be 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16, 18, 19 or 20, etc.
In one embodiment, the first cylindrical battery 10 and the second cylindrical battery 20 are arranged at intervals, the distance between the first cylindrical battery 10 and the second cylindrical battery 20 is c, the thickness of the heat exchange structure 40 is b, and 1-b/c is less than or equal to 10 along the second direction, so that the thickness of the heat exchange structure 40 is not less than the distance between the first cylindrical battery 10 and the second cylindrical battery 20, the distance between the first cylindrical battery 10 and the second cylindrical battery 20 is smaller on the basis of ensuring the heat exchange capability of the heat exchange structure 40, the space utilization rate of the battery pack is improved, and the volume energy density of the battery pack is further improved.
As shown in connection with fig. 2, the distance of the first and second cylindrical batteries 10 and 20 is denoted as c, the thickness of the heat exchange structure 40 is denoted as b, and the ratio of the thickness b of the heat exchange structure 40 to the distance c between the first and second cylindrical batteries 10 and 20 may be 1, 2, 3, 4, 5, 6, 8, 9, or 10, etc.
In one embodiment, the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are all connected with the heat exchange structure 40 in an insulating manner, so that the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 are prevented from being electrically connected through the heat exchange structure 40, thereby causing a safety risk of the battery pack.
The heat exchange structure 40 may include a metal structure, and the shells of the first cylindrical battery 10, the second cylindrical battery 20, and the third cylindrical battery 30 may be charged structures, so that it is required to ensure that the first cylindrical battery 10, the second cylindrical battery 20, and the third cylindrical battery 30 are all connected with the heat exchange structure 40 in an insulating manner, for example, an insulating film is disposed between the first cylindrical battery 10, the second cylindrical battery 20, and the third cylindrical battery 30 and the heat exchange structure 40, or an insulating coating may be disposed on the heat exchange structure 40, or the heat exchange structure 40 itself may include an insulating structure, which is not limited herein.
In one embodiment, as shown in fig. 1, the first side 41 is provided with a first recess 411 and a second recess 412, the first cylindrical battery 10 and the second cylindrical battery 20 are located in the first recess 411 and the second recess 412, respectively, the second side 42 is provided with a third recess 421, and the third cylindrical battery 30 is located in the third recess 421; wherein, radian of the first recess 411, the second recess 412 and the third recess 421 is not greater than pi/2, when ensuring that the heat exchange structure 40 is reliably matched with the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30, space utilization rate of the battery pack is improved, positioning of the cylindrical battery pack can be realized, assembling capacity of the battery pack is improved, and contact area of the heat exchange structure 40 with the first cylindrical battery 10, the second cylindrical battery 20 and the third cylindrical battery 30 can be improved, so that heat exchange capacity is improved.
It should be noted that, the heat exchange structure 40 may include a bent plate, as shown in fig. 1 and 2, the heat exchange structure 40 may be curved, so as to form a first recess 411, a second recess 412, and a third recess 421; alternatively, the heat exchange structure 40 may be entirely linear, but individual depressions may be punched in the heat exchange structure 40.
In one embodiment, as shown in fig. 1 and 2, the battery pack further includes a fourth cylindrical battery 50, the fourth cylindrical battery 50 and the third cylindrical battery 30 are arranged along the first direction, the fourth cylindrical battery 50 is located at the second side 42, the fourth cylindrical battery 50 has a fourth center line 51, the fourth center line 51 and the first center line 11 are located on the third plane 3, and an included angle between the first plane 1 and the third plane 3 is 45 ° -70 °, so that a heat exchanging contact angle formed among the first cylindrical battery 10, the third cylindrical battery 30 and the fourth cylindrical battery 50 can be reasonably controlled, thereby ensuring the overall heat exchanging capability of the battery pack, and avoiding the problem of serious local heat generation.
The fourth centre line 51 and the first centre line 11 lie on the third plane 3, the third plane 3 in fig. 1 and 2 being represented by the connection of the fourth centre line 51 and the first centre line 11. The fourth center line 51 is the center line of the fourth cylindrical battery 50.
It should be noted that the heat exchange structure 40 may be used for heat dissipation of the battery pack, for example, a large amount of heat is generated during the charge and discharge of the battery pack, so that heat dissipation is required in time. Of course, it is not excluded that the heat exchanging structure 40 may be used for achieving heating, e.g. in case of a low ambient temperature, by using the heat exchanging structure 40 for waking up the operational capacity of the cylindrical battery.
The battery pack may further include a plurality of other cylindrical batteries, and the plurality of cylindrical batteries may form a battery string, thereby satisfying the energy requirement of the battery pack, and the number of the cylindrical batteries included in the battery pack is not limited.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. A battery pack, comprising:
-a first cylindrical battery (10), the first cylindrical battery (10) having a first centre line (11);
a second cylindrical battery (20), the second cylindrical battery (20) having a second center line (21), the first cylindrical battery (10) and the second cylindrical battery (20) being arranged along a first direction;
a third cylindrical battery (30), the third cylindrical battery (30) having a third centerline (31);
a heat exchange structure (40), the heat exchange structure (40) having a first side (41) and a second side (42) disposed opposite to each other, the first cylindrical battery (10) and the second cylindrical battery (20) being located on the first side (41), the third cylindrical battery (30) being located on the second side (42), the third cylindrical battery (30) coinciding with an orthographic projection portion of the first cylindrical battery (10) on a same plane, along a second direction perpendicular to the first direction, and the third cylindrical battery (30) coinciding with an orthographic projection portion of the second cylindrical battery (20) on a same plane, the second direction being perpendicular to the planes of the first center line (11) and the second center line (21);
the first central line (11) and the third central line (31) are positioned on a first plane (1), the second central line (21) and the third central line (31) are positioned on a second plane (2), and an included angle between the first plane (1) and the second plane (2) is a, and a is more than or equal to 30 degrees and less than or equal to 120 degrees.
2. The battery of claim 1, wherein 45 ° -a +.70 °.
3. The battery pack according to claim 1, wherein the diameters of the first cylindrical battery (10), the second cylindrical battery (20) and the third cylindrical battery (30) are all equal to or larger than 35mm.
4. The battery according to claim 1, wherein the radius of each of the first cylindrical cell (10), the second cylindrical cell (20) and the third cylindrical cell (30) is r,0.5 °/mm +.a/r +.10 °/mm.
5. The battery according to claim 1, wherein the thickness of the heat exchanging structure (40) is 2mm-6mm in the second direction.
6. The battery according to any one of claims 1 to 5, wherein the thickness of the heat exchanging structure (40) is b, and the radii of the first cylindrical cell (10), the second cylindrical cell (20) and the third cylindrical cell (30) are r,2 r/b 20, respectively, in the second direction.
7. The battery pack according to any one of claims 1 to 5, wherein the first cylindrical battery (10) and the second cylindrical battery (20) are arranged at intervals, the distance between the first cylindrical battery (10) and the second cylindrical battery (20) is c, and the thickness of the heat exchanging structure (40) in the second direction is b, 1-10.
8. The battery according to any one of claims 1 to 5, wherein the first cylindrical battery (10), the second cylindrical battery (20) and the third cylindrical battery (30) are all connected in an insulating manner with the heat exchanging structure (40).
9. The battery according to any one of claims 1 to 5, wherein the first side (41) is provided with a first recess (411) and a second recess (412), the first cylindrical battery (10) and the second cylindrical battery (20) being located within the first recess (411) and the second recess (412), respectively, the second side (42) being provided with a third recess (421), the third cylindrical battery (30) being located within the third recess (421);
wherein the radians of the first recess (411), the second recess (412) and the third recess (421) are not more than pi/2.
10. The battery according to any one of claims 1 to 5, further comprising a fourth cylindrical cell (50), the fourth cylindrical cell (50) and the third cylindrical cell (30) being arranged along the first direction, the fourth cylindrical cell (50) being located at the second side (42), the fourth cylindrical cell (50) having a fourth centerline (51), the fourth centerline (51) being located on a third plane (3) with the first centerline (11), the angle between the first plane (1) and the third plane (3) being 45 ° -70 °.
11. The battery according to any one of claims 1 to 5, wherein the heat exchanging structure (40) comprises bent plates inside for circulating a heat exchanging medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320775830.6U CN219371135U (en) | 2023-04-10 | 2023-04-10 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320775830.6U CN219371135U (en) | 2023-04-10 | 2023-04-10 | Battery pack |
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