CN219476843U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack, which comprises: the first single battery comprises a first surface and a second surface which are perpendicular to each other, a first pole assembly is arranged on the second surface, and the second surface is parallel to the height direction of the first single battery; a second cell including a third surface; the two opposite surfaces of the heat exchange plate are respectively opposite to the first surface and the third surface, so that the heat exchange efficiency of the heat exchange plate can be improved, and the heat dissipation capacity of the battery pack is improved; the first pipeline structure is communicated with the heat exchange plate and is arranged on one side, close to the second surface, of the first single battery, and the first pipeline structure and the first pole assembly are arranged along the height direction of the first single battery, so that the first pipeline structure is prevented from occupying the space of the battery pack in the height direction, and the volume of the battery pack is convenient to reduce.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

In the related art, a battery pack having a long length is poor in heat dissipation performance, and the space utilization of the assembled battery pack is low, resulting in an insufficient energy density of the battery pack.

Disclosure of Invention

The utility model provides a battery pack to improve the service performance of the battery pack.

The present utility model provides a battery pack including:

the first single battery comprises a first surface and a second surface which are perpendicular to each other, a first pole assembly is arranged on the second surface, and the second surface is parallel to the height direction of the first single battery;

a second cell including a third surface;

the two opposite surfaces of the heat exchange plate are respectively opposite to the first surface and the third surface;

the first pipeline structure is communicated with the heat exchange plate and is arranged on one side, close to the second surface, of the first single battery, and the first pipeline structure and the first pole assembly are arranged along the height direction of the first single battery.

The battery pack comprises the first single battery, the second single battery, the heat exchange plate and the first pipeline structure, wherein the first pole component of the first single battery is arranged on the second surface parallel to the height direction of the first single battery, so that the first pole component can be prevented from occupying the space of the first single battery in the height direction, the space utilization rate of the first single battery in the height direction is improved, the energy density of the first single battery is improved, and the energy density of the assembled battery is improved. The two opposite surfaces of the heat exchange plate are respectively opposite to the first surface of the first single battery and the third surface of the second single battery, so that the heat exchange efficiency of the heat exchange plate can be improved, and the heat dissipation capacity of the battery pack can be improved. The first pipeline structure is communicated with the heat exchange plate to form a cooling liquid channel with the heat exchange plate, and the first pipeline structure is arranged on one side of the first single battery close to the second surface, so that the first pipeline structure can be prevented from occupying the space of the battery pack in the height direction, and the volume of the battery pack is convenient to reduce. Meanwhile, the first pipeline structure and the first pole assembly are arranged along the height direction of the first single battery, so that the first pipeline structure and the first pole assembly can be prevented from being mutually interfered, the structural layout of the battery pack can be optimized, and the service performance of the battery pack is improved.

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 partial schematic structure of a battery pack according to an exemplary embodiment;

FIG. 2 is a schematic cross-sectional structure of FIG. 1, shown in accordance with an exemplary embodiment;

fig. 3 is a partial schematic structure of another battery pack according to an exemplary embodiment;

FIG. 4 is a schematic cross-sectional structure of FIG. 3, shown in accordance with an exemplary embodiment;

fig. 5 is a schematic structural view of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

10. a first unit cell; 11. a first surface; 12. a second surface; 13. a first pole assembly; 14. a first coiled electrical core; 15. a fifth surface; 16. a first winding open end; 20. a second unit cell; 21. a third surface; 22. a fourth surface; 23. a second post assembly; 24. a second coiled electrical core; 25. a sixth surface; 26. a second winding open end; 30. a heat exchange plate; 40. a first pipeline structure; 50. and a second pipeline structure.

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 to 5, comprising: the first single battery 10 comprises a first surface 11 and a second surface 12 which are perpendicular to each other, a first pole component 13 is arranged on the second surface 12, and the second surface 12 is parallel to the height direction B of the first single battery 10; a second cell 20, the second cell 20 comprising a third surface 21; a heat exchange plate 30, two opposite surfaces of the heat exchange plate 30 being disposed opposite to the first surface 11 and the third surface 21, respectively; the first pipe structure 40 is communicated with the heat exchange plate 30, and is disposed on a side of the first unit cell 10 near the second surface 12, and the first pipe structure 40 and the first pole assembly 13 are disposed along the height direction B of the first unit cell 10.

The battery pack according to one embodiment of the present utility model includes the first unit battery 10, the second unit battery 20, the heat exchange plate 30 and the first pipe structure 40, where the first post component 13 of the first unit battery 10 is disposed on the second surface 12 parallel to the height direction B of the first unit battery 10, so that the first post component 13 can be prevented from occupying the space of the first unit battery 10 in the height direction B, thereby improving the space utilization rate of the first unit battery 10 in the height direction B, and further improving the energy density of the first unit battery 10, and improving the energy density of the assembled battery. The opposite surfaces of the heat exchange plate 30 are respectively opposite to the first surface 11 of the first unit cell 10 and the third surface 21 of the second unit cell 20, so that the heat exchange efficiency of the heat exchange plate 30 can be improved, and the heat dissipation capacity of the battery pack can be improved. The first pipeline structure 40 is communicated with the heat exchange plate 30 to form a cooling liquid channel with the heat exchange plate 30, and the first pipeline structure 40 is arranged on one side of the first single battery 10 close to the second surface 12, so that the first pipeline structure 40 can be prevented from occupying the space of the battery pack in the height direction B, and the volume of the battery pack is convenient to reduce. Meanwhile, the first pipeline structure 40 and the first pole assembly 13 are arranged along the height direction B of the first single battery 10, so that mutual interference between the first pipeline structure 40 and the first pole assembly 13 can be avoided, the structural layout of the battery pack can be optimized, and the service performance of the battery pack is improved.

In one embodiment, the first conduit structure 40 may be located below the first pole assembly 13, preventing the first conduit structure 40 from shielding the first pole assembly 13, thereby facilitating connection of the first pole assembly 13 with other electrode structures.

In one embodiment, the first pipe structure 40 is spaced apart from the first pole assembly 13, namely: the first pipe structure 40 and the first pole assembly 13 are not in contact with each other in the height direction B of the first unit cell 10, so that the first pipe structure 40 and the first pole assembly 13 can be further prevented from interfering with each other.

In one embodiment, along the height direction B of the first unit cell 10, the first pipe structure 40 coincides with the orthographic projection of the first pole assembly 13 on the same surface, that is: the first pipe structure 40 and the first pole component 13 occupy the same space outside the second surface 12 of the first single battery 10, thereby ensuring the space utilization of the battery pack. And, can make first piping structure 40 and first utmost point post subassembly 13 keep away from the side flush of second surface 12, the group of group's of facilitating.

In one embodiment, the second single battery 20 further includes a fourth surface 22, the fourth surface 22 is provided with a second post component 23, and the fourth surface 22 is parallel to the height direction B of the second single battery 20, so that the second post component 23 can be prevented from occupying the space of the first single battery 10 in the height direction B, thereby improving the space utilization rate of the second single battery 20 in the height direction B, so as to improve the energy density of the second single battery 20, and further improve the energy density of the assembled battery.

The first pipeline structure 40 is further arranged on one side, close to the fourth surface 22, of the second single battery 20, circulation of cooling liquid of the whole battery pack can be achieved through one pipeline structure, the first pipeline structure 40 can be prevented from occupying space of the second single battery 20 in the height direction B, and the volume of the battery pack can be conveniently reduced.

The first pipeline structure 40 and the second pole assembly 23 are arranged along the height direction B of the second single battery 20, so that mutual interference between the first pipeline structure 40 and the second pole assembly 23 can be avoided, the structural layout of the battery pack can be optimized, and the service performance of the battery pack is improved.

In one embodiment, the first conduit structure 40 may be positioned below the second pole assembly 23 to prevent the first conduit structure 40 from shielding the second pole assembly 23, thereby facilitating connection of the second pole assembly 23 to other electrode structures.

In one embodiment, the first conduit structure 40 is spaced apart from the second pole assembly 23 by: the first pipe structure 40 and the second pillar assembly 23 are not in contact with each other in the height direction B of the second unit cell 20, so that the first pipe structure 40 and the second pillar assembly 23 can be further prevented from interfering with each other.

In one embodiment, along the height direction B of the second unit cell 20, the orthographic projection of the first pipe structure 40 and the second pillar assembly 23 on the same surface coincides with: the first pipe structure 40 and the second pole assembly 23 occupy the same space outside the fourth surface 22 of the second unit cell 20, thereby ensuring the space utilization of the battery pack. And, can make first piping structure 40 and second post assembly 23 keep away from the one side flush of fourth surface 22, the group of follow-up group battery is convenient.

In one embodiment, the heat exchange plate 30 is formed with heat exchange channels, which may be cavities, and one or more heat exchange channels may be disposed in the heat exchange plate 30, and the plurality of heat exchange channels may be uniformly distributed in the heat exchange plate 30, and a heat exchange medium may be disposed in the heat exchange channels for exchanging heat between the first unit cell 10 and the second unit cell 20. The present disclosure is not limited herein with respect to the number of heat exchange channels.

As shown in fig. 5, the heat exchange plates 30 may be plural, and the first pipe structure 40 may be in communication with the plural heat exchange plates 30, that is: the first pipe structure 40 may communicate with the heat exchange channels of the plurality of heat exchange plates 30, thereby forming a cooling liquid circulation channel of the battery pack.

The plurality of heat exchange plates 30 may correspond to a plurality of unit cells including the first unit cell 10 and the second unit cell 20.

In one embodiment, the heat exchange plates 30 are disposed on the opposite first surfaces 11 of the first unit cell 10, so that heat can be exchanged simultaneously with the two first surfaces 11 of the first unit cell 10 through the heat exchange plates 30, so as to further improve the heat exchange efficiency of the heat exchange plates 30, improve the heat dissipation capacity of the first unit cell 10, and further improve the service performance of the battery pack.

Or, the heat exchange plates 30 are disposed on the two opposite third surfaces 21 of the second unit battery 20, so that heat exchange can be performed on the two third surfaces 21 of the second unit battery 20 through the heat exchange plates 30 at the same time, so as to further improve the heat exchange efficiency of the heat exchange plates 30, improve the heat dissipation capacity of the first unit battery 10, and further improve the service performance of the battery pack.

In one embodiment, the opposite first surfaces 11 of the first battery cell 10 are each provided with a heat exchange plate 30, while the opposite third surfaces 21 of the second battery cell 20 are also each provided with a heat exchange plate 30. So set up, the first single battery 10 and the second single battery 20 in the group battery that can the at utmost carry out the heat transfer, guarantee that the group battery can not appear overheated problem in the in-process of using.

In some embodiments, as shown in fig. 1 to 5, the battery pack may further include a second pipe structure 50, where the second pipe structure 50 is in communication with the heat exchange plate 30 and is located at two opposite ends of the heat exchange plate 30 with the first pipe structure 40, so that the second pipe structure 50, together with the first pipe structure 40 and the heat exchange plate 30, can form a cooling liquid circulation channel of the battery pack, can provide cooling liquid for the heat exchange plate 30 through one pipe structure, and can return the cooling liquid after heat exchange through the other pipe structure.

The first pole assemblies 13 are arranged on the two opposite second surfaces 12 of the first single battery 10, the second pipeline structures 50 and the first pole assemblies 13 are arranged along the height direction B of the first single battery 10, mutual interference between the second pipeline structures 50 and the first pole assemblies 13 can be avoided, and therefore the structural layout of the battery pack can be further optimized, and the service performance of the battery pack is improved.

In one embodiment, the second conduit structure 50 may be located below the first pole assembly 13, preventing the second conduit structure 50 from shielding the first pole assembly 13, thereby facilitating connection of the first pole assembly 13 with other electrode structures.

In one embodiment, the second pipe structure 50 is spaced apart from the first pole assembly 13, namely: the second pipe structure 50 and the first pole assembly 13 are not in contact with each other in the height direction B of the first unit cell 10, so that the second pipe structure 50 and the first pole assembly 13 can be further prevented from interfering with each other.

In one embodiment, along the height direction B of the first unit cell 10, the second pipe structure 50 coincides with the orthographic projection of the first pole assembly 13 on the same surface, that is: the second pipeline structure 50 and the first pole component 13 occupy the same space outside the second surface 12 of the first single battery 10, so that the space utilization rate of the battery pack is ensured. And, can make second piping structure 50 and first utmost point post subassembly 13 keep away from the side flush of second surface 12, the group of group's of being convenient for.

The second pole assemblies 23 are arranged on the two opposite fourth surfaces 22 of the second single battery 20, the second pipeline structure 50 and the second pole assemblies 23 are arranged along the height direction B of the second single battery 20, mutual interference between the second pipeline structure 50 and the second pole assemblies 23 can be avoided, accordingly, the structural layout of the battery pack can be optimized, and the service performance of the battery pack is improved.

In one embodiment, the second conduit structure 50 may be positioned below the second pole assembly 23 to prevent the second conduit structure 50 from shielding the second pole assembly 23, thereby facilitating connection of the second pole assembly 23 to other electrode structures.

In one embodiment, the second conduit structure 50 is spaced apart from the second pole assembly 23 by: the second pipe structure 50 and the second pillar assembly 23 are not in contact with each other in the height direction B of the second unit cell 20, so that the second pipe structure 50 and the second pillar assembly 23 can be further prevented from interfering with each other.

In one embodiment, along the height direction B of the second unit cell 20, the second pipe structure 50 coincides with the orthographic projection of the second post assembly 23 on the same surface, that is: the second pipe structure 50 and the second pole assembly 23 occupy the same space outside the fourth surface 22 of the second unit cell 20, thereby ensuring space utilization of the battery pack. And, the second pipe structure 50 and the side of the second pole assembly 23 away from the fourth surface 22 can be made flush, so that the battery pack is conveniently grouped.

In one embodiment, the first surface 11 of the first cell 10 is a large surface of the first cell 10, and the third surface 21 of the second cell 20 is a large surface of the second cell 20.

In this embodiment, the first surface 11 of the first unit cell 10 and the third surface 21 of the second unit cell 20 may be considered as surfaces with the greatest heat generated by the cells, and further, the large surface of the unit cell may be a surface with the greatest unit cell area, for example, when the unit cell is a prismatic cell, the surface with the greatest unit cell area is a large surface of the unit cell, and the large surfaces of the unit cells may be two. By making the heat exchange plate 30 contact with the first unit cell 10 and the second unit cell 20, the heat exchange plate 30 can realize rapid refrigeration of the first unit cell 10 and the second unit cell 20, so that the thermal runaway problem of the first unit cell 10 and the second unit cell 20 is avoided. The opposite surfaces of the heat exchange plate 30 are respectively in contact with the first surface 11 and the third surface 21, and the heat exchange rate of the unit cell can be significantly improved.

The length L1 of the first surface 11 may be 300mm or more and the length L2 of the third surface 21 may be 300mm or more, so that the lengths of the first and second unit batteries 10 and 20 can be made longer, and the energy density of the batteries can be improved.

In one embodiment, the first single battery 10 has a length direction a and a height direction B, the length of the first single battery 10 may be denoted as L1, the height of the first single battery 10 may be denoted as W1, and 300mm is less than or equal to L1 is less than or equal to 800mm,80mm is less than or equal to W1 is less than or equal to 150mm, so that the first single battery 10 may be a battery with a relatively large length, not only the capacity of the first single battery 10 may be ensured, but also the subsequent grouping of the first single battery 10 may be facilitated, thereby improving the service performance of the battery pack.

The second single battery 20 has a length direction A and a height direction B, the length of the second single battery 20 can be expressed as L2, the height of the second single battery 20 can be expressed as W2, and L2 is more than or equal to 300mm and less than or equal to 800mm, W2 is more than or equal to 80mm and less than or equal to 150mm, so that the second single battery 20 is a battery with a larger length and height, the capacity of the second single battery 20 can be ensured, and the subsequent grouping of the second single battery 20 can be facilitated, so that the service performance of the battery pack is improved.

In one embodiment, as shown in fig. 2 and 4, the first unit cell 10 includes a first winding type battery cell 14, the second unit cell 20 includes a second winding type battery cell 24, and the winding type battery cell is lower in production difficulty and higher in production efficiency compared with the laminated type battery cell, and meanwhile, the winding type battery cell has higher energy density and is beneficial to shortening an electron transmission path, so that the service performance of the first unit cell 10 and the second unit cell 20 can be improved.

The battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell is a unit formed by winding a stacking part, and the stacking part comprises a first pole piece, a separator and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged. The first and second pole pieces are coated with an active substance.

The first winding type battery cell 14 and the second winding type battery cell 24 are obtained by winding a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece on a winding needle. Of course, in certain embodiments, it is not precluded that the membrane sheet may be removed.

In one embodiment, as shown in fig. 2, the first unit cell 10 further includes a fifth surface 15, the fifth surface 15 is perpendicular to the first surface 11, the fifth surface 15 is perpendicular to the second surface 12, the opposite ends of the first winding type electric core 14 form first winding open ends 16, and a plane of the first winding open ends 16 is opposite to the fifth surface 15, so that a speed of the electrolyte infiltrating the first winding type electric core 14 can be significantly increased.

In one embodiment, the plane of the first winding open end 16 of the first winding type battery cell 14 is parallel to the fifth surface 15, so that a battery cell with a relatively regular structure can be obtained, and the service performance of the first winding type battery cell 14 is improved.

In one embodiment, as shown in fig. 2, only one first winding type battery cell 14 is disposed in the first single battery 10, that is, the first winding type battery cell 14 is a long battery cell, and one long battery cell can form one battery, so that the manufacturing efficiency of the first single battery 10 can be improved, that is, the installation efficiency of the first winding type battery cell 14 can be improved, and the production efficiency of the battery pack can be improved.

In one embodiment, the ratio of the length and the height of the first winding type battery cell 14 is equal to or greater than 2.5, and the length of the first winding type battery cell 14 is not less than 280mm, so that one first winding type battery cell 14 has relatively large capacity, the capacity of the first single battery cell 10 is improved, and the manufacturing efficiency of the first single battery cell 10 is improved.

In some embodiments, a plurality of first winding type electric cells 14 may be disposed in the first single battery 10, and the plurality of first winding type electric cells 14 are arranged along the length direction a of the first single battery 10, so that the plurality of first winding type electric cells 14 may be disposed inside the first single battery 10, thereby ensuring the capacity of the first single battery 10, and also facilitating the forming of the first winding type electric cells 14.

The plurality of first wound cells 14 may be electrically connected, and the plurality of first wound cells 14 may be connected in series, for example, the tabs of two adjacent first wound cells 14 may be directly connected, or connected by other conductive structures, which is not limited herein. Alternatively, the plurality of first wound cells 14 may be connected in parallel. The tabs may be connected by welding, ultrasonic welding, laser welding, resistance welding, or the like, or may be bonded by conductive adhesive or physically contacted, and the connection is not limited.

In one embodiment, the plurality of first wound cells 14 within the first cell 10 may share the first terminal assembly 13. As shown in fig. 4, in one embodiment, the second unit cell 20 further includes a sixth surface 25, the sixth surface 25 is perpendicular to the third surface 21, the fifth surface 15 is perpendicular to the fourth surface 22, and the opposite ends of the second winding type battery cell 24 form second winding open ends 26, and the plane of the second winding open ends 26 is opposite to the sixth surface 25, so that the speed of the electrolyte infiltrating the second winding type battery cell 24 can be significantly increased.

In one embodiment, the plane of the second winding open end 26 of the second winding type battery cell 24 is parallel to the sixth surface 25, so that a battery cell with a relatively regular structure can be obtained, and the service performance of the second winding type battery cell 24 is improved.

In one embodiment, as shown in fig. 4, only one second winding type battery cell 24 is disposed in the second single battery cell 20, that is, the second winding type battery cell 24 is a long battery cell, and one long battery cell can form one second single battery cell 20, so that the manufacturing efficiency of the second single battery cell 20 can be improved, that is, the installation efficiency of the second winding type battery cell 24 can be improved, and the production efficiency of the battery pack can be improved.

In one embodiment, the ratio of the length to the height of the second winding type battery cell 24 is equal to or greater than 2.5, and the length of the second winding type battery cell 24 is not less than 280mm, so that one second winding type battery cell 24 has relatively large capacity, thereby improving the capacity of the second single battery cell 20 and improving the manufacturing efficiency of the second single battery cell 20.

In some embodiments, a plurality of second wound cells 24 may be disposed in the second unit cell 20, and the plurality of second wound cells 24 are arranged along the length direction a of the second unit cell 20, so that the plurality of second wound cells 24 may be disposed inside the second unit cell 20, thereby ensuring the capacity of the second unit cell 20, and also facilitating the forming of the second wound cells 24.

The plurality of second wound cells 24 may be electrically connected, and the plurality of second wound cells 24 may be connected in series, for example, the tabs of two adjacent second wound cells 24 may be directly connected, or connected by other conductive structures, which are not limited herein. Alternatively, the plurality of second wound cells 24 may be connected in parallel. The tabs may be connected by welding, ultrasonic welding, laser welding, resistance welding, or the like, or may be bonded by conductive adhesive or physically contacted, and the connection is not limited.

In one embodiment, the plurality of second wound cells 24 within the second cell 20 may share the second pole assembly 23.

In one embodiment, the first unit cell 10 is a quadrangular type cell, and the second unit cell 20 is a quadrangular type cell. The quadrangular battery mainly refers to a prismatic shape, but whether each side of the prism is a straight line with strict meaning is not strictly limited, and the corners between the sides are not necessarily right angles, and can be arc transition.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of first unit cells 10 and second unit cells 20, and the unit cells may be prismatic cells, and the battery module may further include an end plate and a side plate, which are used to fix the plurality of unit cells.

The battery pack includes a plurality of first unit batteries 10, a plurality of second unit batteries 20, and a case for fixing the plurality of first unit batteries 10 and the plurality of second unit batteries 20.

The battery pack includes a first unit battery 10 and a second unit battery 20, and the first unit battery 10 and the second unit battery 20 are disposed in the case. The first unit cell 10 and the second unit cell 20 may form a battery module and then be mounted in the case. Alternatively, the first unit cell 10 and the second unit cell 20 may be directly disposed in the case, that is, the first unit cell 10 and the second unit cell 20 may be fixed by using the case without grouping the first unit cell 10 and the second unit cell 20.

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 (12)

1. A battery pack, comprising:

the first single battery (10), the first single battery (10) comprises a first surface (11) and a second surface (12) which are perpendicular to each other, a first pole component (13) is arranged on the second surface (12), and the second surface (12) is parallel to the height direction of the first single battery (10);

-a second cell (20), the second cell (20) comprising a third surface (21);

-a heat exchange plate (30), the opposite two surfaces of the heat exchange plate (30) being arranged opposite to the first surface (11) and the third surface (21), respectively;

the first pipeline structure (40), first pipeline structure (40) with heat exchange plate (30) are linked together, and set up in one side that first battery cell (10) is close to second surface (12), first pipeline structure (40) with first utmost point post subassembly (13) are followed the direction of height of first battery cell (10) sets up.

2. The battery according to claim 1, characterized in that the first pipe structure (40) is located below the first pole assembly (13).

3. The battery according to claim 1, wherein the first conduit structure (40) is spaced apart from the first pole assembly (13).

4. The battery pack according to claim 1, wherein the first pipe structure (40) coincides with the orthographic projection of the first pole assembly (13) on the same surface in the height direction of the first unit cell (10).

5. The battery pack according to claim 1, wherein the second unit cell (20) further comprises a fourth surface (22), the fourth surface (22) being provided with a second post assembly (23), the fourth surface (22) being parallel to the height direction of the second unit cell (20);

the first pipeline structure (40) is further arranged on one side, close to the fourth surface (22), of the second single battery (20), and the first pipeline structure (40) and the second pole assembly (23) are arranged along the height direction of the second single battery (20).

6. The battery pack according to claim 1, wherein the first surface (11) is a large surface of the first unit cell (10), and the third surface (21) is a large surface of the second unit cell (20).

7. The battery according to claim 1, wherein the heat exchange plates (30) are plural, and the first pipe structure (40) communicates with plural of the heat exchange plates (30);

wherein, the two opposite first surfaces (11) of the first single battery (10) are provided with the heat exchange plate (30), and/or the two opposite third surfaces (21) of the second single battery (20) are provided with the heat exchange plate (30).

8. The battery pack according to claim 1, further comprising a second pipe structure (50), the second pipe structure (50) being in communication with the heat exchange plate (30) and being located at opposite ends of the heat exchange plate (30) from the first pipe structure (40), respectively.

9. The battery pack according to claim 8, wherein the first pole assemblies (13) are provided on both of the opposite second surfaces (12) of the first unit cells (10), and the second pipe structures (50) and the first pole assemblies (13) are disposed along the height direction of the first unit cells (10).

10. The battery pack according to claim 1, wherein the length of the first surface (11) is 300mm or more and the length of the third surface (21) is 300mm or more.

11. The battery pack according to claim 10, wherein the first cell (10) comprises a first wound cell (14) and the second cell (20) comprises a second wound cell (24).

12. The battery pack according to claim 11, wherein the length of the first winding type battery cell (14) is not less than 280mm, the first unit cell (10) further comprises a fifth surface (15), the fifth surface (15) is perpendicular to the first surface (11), the fifth surface (15) is perpendicular to the second surface (12), the opposite ends of the first winding type battery cell (14) form a first winding open end (16), and a plane where the first winding open end (16) is located is opposite to the fifth surface (15).