Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. In the first direction, every two adjacent first heat exchange plates are oppositely arranged at intervals, a first interval is formed between every two adjacent first heat exchange plates, every two adjacent second heat exchange plates are oppositely arranged at intervals, a second interval is formed between every two adjacent second heat exchange plates, and the second intervals are smaller than the first intervals; the two adjacent first heat exchange plates and the second heat exchange plate between the two adjacent first heat exchange plates are enclosed to form a containing space; the single batteries are arranged in the containing space, the side walls, in the first direction, of the single batteries are connected with the first heat exchange plate, the ends, in the second direction, of the single batteries are connected with the second heat exchange plate, and the second direction intersects with the first direction. The heat exchanger can perform heat exchange on the single batteries from multiple sides of the single batteries, so that the heat exchange speed of the single batteries can be improved, the safety of the battery pack is conveniently ensured, and the uniformity of temperature distribution in the single batteries is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary batteries, in particular to a battery pack and an electrical device. Background Art

[0002] With the development of new energy devices, high endurance, high-rate fast charging and safety are the main development directions in the current new energy industry. Among them, in terms of fast charging ability, under high-rate charging conditions, a large amount of heat is concentrated in the pole region of the battery cell. However, the current heat exchange method is likely to cause uneven temperature distribution of the battery cell and low heat exchange efficiency. Summary of the Utility Model

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a battery pack and an electrical device that overcome the above problems or at least partially solve the above problems.

[0004] To solve the above problems, embodiments of the present utility model disclose a battery pack having a first direction and a second direction intersecting with the first direction, including:

[0005] A heat exchanger, the heat exchanger includes at least two heat exchange components, wherein,

[0006] Each heat exchange component includes a first heat exchange plate and a second heat exchange plate connected to the first heat exchange plate, and the first heat exchange plate and the second heat exchange plate intersect;

[0007] Along the first direction, two adjacent first heat exchange plates are spaced apart and arranged oppositely, and there is a first distance between two adjacent first heat exchange plates; two adjacent second heat exchange plates are spaced apart and arranged oppositely, and there is a second distance between two adjacent second heat exchange plates, and the second distance is smaller than the first distance;

[0008] Two adjacent first heat exchange plates and the second heat exchange plates between two adjacent first heat exchange plates enclose a receiving space;

[0009] A battery cell, the battery cell is arranged in the receiving space, a side wall of the battery cell in the first direction is connected to the first heat exchange plate, and an end of the battery cell in the second direction is connected to the second heat exchange plate.

[0010] Optionally, two adjacent heat exchange components are respectively a first heat exchange component and a second heat exchange component;

[0011] In the first heat exchange component, the second heat exchange plate extends from one end of the first heat exchange plate in the second direction towards the second heat exchange component;

[0012] In the second heat exchange assembly, the second heat exchange plate extends from one end of the first heat exchange plate in the second direction toward the first heat exchange assembly.

[0013] Optionally, the second heat exchange assemblies adjacent to the first heat exchange assembly are disposed on both sides of the first heat exchange assembly;

[0014] In the first heat exchange assembly, the first heat exchange plate is the first target heat exchange plate, and the second heat exchange plate is the second target heat exchange plate. The second target heat exchange plate includes a first end and a second end along the first direction;

[0015] The first end is disposed on one side of the first target heat exchange plate and extends toward the second heat exchange assembly on one side of the first target heat exchange plate; the second end is disposed on the other side of the first target heat exchange plate and extends toward the second heat exchange assembly on the other side of the first target heat exchange plate.

[0016] Optionally, the battery pack further has a third direction, and the first direction, the second direction, and the third direction intersect pairwise;

[0017] The first heat exchange plate is provided with a plurality of first heat exchange channels extending along the third direction, and the second heat exchange plate is provided with a plurality of second heat exchange channels extending along the third direction;

[0018] Along the third direction, one end of the first heat exchange plate is provided with a first current collector communicating with the first heat exchange channel, and the other end of the first heat exchange plate is provided with a second current collector communicating with the first heat exchange channel; one end of the second heat exchange plate is provided with a third current collector communicating with the second heat exchange channel, and the other end of the second heat exchange plate is provided with a fourth current collector communicating with the second heat exchange channel;

[0019] The heat exchanger further includes a feed pipe and a discharge pipe;

[0020] The feed pipe is respectively connected to the first current collector and the third current collector, and the feed pipe is configured to respectively convey a heat exchange medium to the first heat exchange channel and the second heat exchange channel;

[0021] The discharge pipe is respectively connected to the second current collector and the fourth current collector, and the discharge pipe is configured to discharge the heat exchange medium in the first heat exchange channel and the second heat exchange channel.

[0022] Optionally, the feed pipe includes a first main pipe and at least two first branch pipes corresponding to the third current collector; the first main pipe passes through the first current collector and is connected to the first current collector; one end of the first branch pipe is connected to the first main pipe, and the other end of the first branch pipe is connected to the corresponding third current collector;

[0023] And / or, the discharge pipe includes a second main pipe and at least two second branch pipes correspondingly arranged with the fourth manifold; the second main pipe penetrates through the second manifold and is connected to the second manifold; one end of the second branch pipe is connected to the second main pipe, and the other end of the second branch pipe is connected to the corresponding fourth manifold.

[0024] Optionally, the battery pack further includes a first electrical connector; in two adjacent accommodation spaces, the battery cells located at the same end in the third direction are a first battery cell and a second battery cell respectively;

[0025] At least one end of the first heat exchange plate disposed between the first battery cell and the second battery cell in the second direction is provided with an avoidance portion;

[0026] The first electrical connector penetrates through the avoidance portion, one end of the first electrical connector is electrically connected to the first battery cell, and the other end of the first electrical connector is electrically connected to the second battery cell.

[0027] Optionally, the battery cell includes a first pole column and a second pole column;

[0028] The exposed ends of the first pole column and the second pole column are both arranged towards the second heat exchange plate and are respectively connected to the second heat exchange plate;

[0029] A first groove is provided on the first pole column, a second groove is provided on the second pole column, and the openings of the first groove and the second groove are both arranged towards the second heat exchange plate;

[0030] One end of the first electrical connector penetrates into the first groove of the first battery cell, and the other end of the first electrical connector penetrates into the first groove or the second groove of the second battery cell.

[0031] Optionally, the battery pack further includes a second electrical connector, and a plurality of the single battery cells in the same accommodation space are arranged in the third direction;

[0032] The battery cell is inverted in the accommodation space, the battery cell has a first pole column and a second pole column, the first pole column and the second pole column are arranged towards the second heat exchange plate, a first groove is provided on the first pole column, a second groove is provided on the second pole column, and the openings of the first groove and the second groove are both arranged towards the second heat exchange plate;

[0033] Within the same accommodation space, one end of the second electrical connector is connected within the first groove of one of two adjacent battery cells, and the other end is connected to the first groove or the second groove of the other battery cell.

[0034] Optionally, the second electrical connector is connected to the second heat exchange plate.

[0035] Optionally, the battery pack further includes a housing, and the housing includes an upper cover and a lower cover;

[0036] The battery cells and the heat exchanger are both disposed within the housing;

[0037] The battery cell has a first side and a second side opposite to each other along the second direction, and the first side is connected to the upper cover;

[0038] The second side is provided with a first pole and a second pole, both the first pole and the second pole are connected to the second heat exchange plate, and the side of the second heat exchange plate away from the battery cell is connected to the lower cover.

[0039] In a second aspect, the present utility model also discloses an electrical device including the above battery pack.

[0040] The embodiments of the present utility model have the following advantages:

[0041] In the embodiments of the present utility model, the side wall of the battery cell in the first direction is connected to the first heat exchange plate, so that the first heat exchange plate can exchange heat with the side wall of the battery cell in the first direction, and the end of the battery cell in the second direction is connected to the second heat exchange plate, so that the second heat exchange plate can exchange heat with the end of the battery cell in the second direction. In this way, the heat exchanger can exchange heat with the battery cell from multiple sides of the battery cell, which can improve the heat exchange speed of the battery cell and facilitate ensuring the safety of the battery pack. Moreover, by exchanging heat from multiple sides of the battery cell respectively, the uniformity of the internal temperature distribution of the battery cell can also be improved. Description of the Drawings

[0042] Figure 1 is a schematic structural diagram of a heat exchanger of the present utility model;

[0043] Figure 2 is a schematic structural diagram of a heat exchange assembly of the present utility model;

[0044] Figure 3 is a cross-sectional view of a heat exchange assembly of the present utility model;

[0045] Figure 4 is a schematic structural diagram of another heat exchange assembly of the present utility model;

[0046] Figure 5 is a cross-sectional view of another heat exchange component of the present utility model;

[0047] Figure 6 is an exploded view of a battery pack of the present utility model;

[0048] Figure 7 is an internal structure assembly drawing of a battery pack of the present utility model;

[0049] Figure 8 is a cross-sectional view of the internal structure assembly of a battery pack of the present utility model;

[0050] Figure 9 is a schematic structural diagram of a battery cell of the present utility model;

[0051] Figure 10 is a schematic structural diagram of a state where a second electrical connector connects a first battery cell and a second battery cell of the present utility model;

[0052] Figure 11 is a schematic structural diagram of a second electrical connector of the present utility model;

[0053] Figure 12 is an assembly structural schematic diagram of a first electrical connector of the present utility model.

[0054] Explanation of reference numerals:

[0055] 1, heat exchanger; 11, first heat exchange plate; 111, first current collecting part; 112, second current collecting part; 113, first heat exchange channel; 114, avoidance part; 12, second heat exchange plate; 121, third current collecting part; 122, fourth current collecting part; 123, second heat exchange channel; 124, first end; 125, second end; 13, feed pipe; 131, first main pipe; 132, first branch pipe; 14, discharge pipe; 141, second main pipe; 142, second branch pipe; 15, liquid inlet; 16, liquid outlet; 17, accommodation space; 2, heat exchange component; 21, first heat exchange component; 211, first target heat exchange plate; 212, second target heat exchange plate; 22, second heat exchange component; 3, battery cell; 31, first pole; 311, first groove; 32, second pole; 321, second groove; 33, explosion-proof valve; 41, first battery cell; 42, second battery cell; 43, third battery cell; 44, fourth battery cell; 51, first electrical connector; 511, connection part; 512, transition part; 52, second electrical connector; 6, housing; 61, upper cover; 62, lower cover; 63, circumferential side plate; 7, support foam. Detailed implementation manners

[0056] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0058] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0059] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0060] Such as Figure 1 、 Figure 6 and Figure 7As shown, one of the core concepts of the embodiment of the utility model is to disclose a battery pack, the battery pack has a first direction X and a second direction Z, the first direction X and the second direction Z intersect, and include: a heat exchanger 1 and a battery cell 3; the heat exchanger 1 may include at least two heat exchange components 2, wherein each heat exchange component 2 includes a first heat exchange plate 11 and a second heat exchange plate 12, the second heat exchange plate 12 is connected to the first heat exchange plate 11, and the first heat exchange plate 11 and the second heat exchange plate 12 intersect; along the first direction X, two adjacent first heat exchange plates 11 are spaced and arranged oppositely, and the adjacent two There is a first spacing between the first heat exchange plates 11; two adjacent second heat exchange plates 12 are spaced and arranged opposite to each other, and there is a second spacing between the two adjacent second heat exchange plates 12, and the second spacing is smaller than the first spacing; the two adjacent first heat exchange plates 11 and the second heat exchange plates 12 between the two adjacent first heat exchange plates 11 enclose a receiving space 17; the battery cell 3 is arranged in the receiving space 17, and the side wall of the battery cell 3 in the first direction X is connected to the first heat exchange plate 11, and the end of the battery cell 3 in the second direction Z is connected to the second heat exchange plate 12.

[0061] In the embodiment of the utility model, the side wall of the battery cell 3 in the first direction X is connected to the first heat exchange plate 11, so that the first heat exchange plate 11 can exchange heat with the side wall of the battery cell 3 in the first direction X, and the end of the battery cell 3 in the second direction Z is connected to the second heat exchange plate 12, so that the second heat exchange plate 12 can exchange heat with the end of the battery cell 3 in the second direction Z. In this way, the heat exchanger 1 can exchange heat with the battery cell 3 from multiple sides of the battery cell 3, which can improve the heat exchange speed of the battery cell 3 and facilitate the safety of the battery pack. Moreover, by exchanging heat from multiple sides of the battery cell 3, the uniformity of the temperature distribution inside the battery cell 3 can also be improved.

[0062] Specifically, the heat exchanger 1 is used to provide heat exchange, for example, it can be used for heating or cooling. The heat exchanger 1 may include at least two heat exchange components 2, each heat exchange component 2 includes a first heat exchange plate 11 and a second heat exchange plate 12, and the first heat exchange plate 11 and the second heat exchange plate 12 intersect and connect. The first heat exchange plate 11 and the second heat exchange plate 12 may be spliced, or the first heat exchange plate 11 and the second heat exchange plate 12 may also be integrally formed.

[0063] Specifically, a heat exchange medium can flow through both the first heat exchange plate 11 and the second heat exchange plate 12 to achieve heat exchange through the heat exchange medium. The angle between the first heat exchange plate 11 and the second heat exchange plate 12 can be a right angle, an acute angle, or an obtuse angle. The first heat exchange plate 11 and the second heat exchange plate 12 can be combined to form an "L"-shaped structure, or the first heat exchange plate 11 and the second heat exchange plate 12 can also be combined to form a "丄"-shaped structure.

[0064] Specifically, at least two heat exchange components 2 can be arranged in sequence. Along the first direction X, two adjacent first heat exchange plates 11 are spaced apart and oppositely arranged, and two adjacent second heat exchange plates 12 are spaced apart and oppositely arranged. There is a first spacing between two adjacent first heat exchange plates 11, and a second spacing between two adjacent second heat exchange plates 12. The second spacing is smaller than the first spacing. In this way, two adjacent first heat exchange plates 11, and the second heat exchange plates 12 between two adjacent first heat exchange plates 11 can enclose to form an accommodation space 17.

[0065] Specifically, the battery cell 3 can be a secondary battery such as a lithium-ion battery or a sodium-ion battery. The battery cell 3 can be arranged in the accommodation space 17, so that the side wall of the battery cell 3 in the first direction X can be connected to the first heat exchange plate 11, and the end of the battery cell 3 in the second direction Z can be connected to the second heat exchange plate 12. In this way, heat can be exchanged on multiple sides of the battery cell 3 through the first heat exchange plate 11 and the second heat exchange plate 12 respectively, thereby improving the heat exchange efficiency of the battery cell 3, ensuring the temperature uniformity inside the battery cell 3, and improving the use safety of the battery pack.

[0066] Specifically, the first heat exchange plate 11 and the battery cell 3 can be in abutment, or the first heat exchange plate 11 and the battery cell 3 can be bonded and fixed through a thermally conductive structural adhesive or a thermally conductive gel, and a glue blocking strip can be arranged between the first heat exchange plate 11 and the battery cell 3 to prevent glue from overflowing. The second heat exchange plate 12 and the battery cell 3 can be in abutment, or the second heat exchange plate 12 and the battery cell 3 can be bonded and fixed through a thermally conductive structural adhesive or a thermally conductive gel, and a glue blocking strip can be arranged between the second heat exchange plate 12 and the battery cell 3 to prevent glue from overflowing.

[0067] As Figure 1 shown, the length, width, and height of the battery pack can correspond to the third direction Y, the first direction X, and the second direction Z respectively. The first heat exchange plate 11 can be parallel to the plane where the third direction Y and the second direction Z are located, and the second heat exchange plate 12 can be parallel to the plane where the first direction X and the third direction Y are located. Specifically, the first heat exchange plate 11 can be a side plate, and the second heat exchange plate 12 can be a bottom plate. Taking the case where the battery cell 3 is inverted in the accommodation space 17 as an example, the first heat exchange plate 11 can exchange heat with the battery cell 3 from the side, and the second heat exchange plate 12 can exchange heat with the battery cell 3 from the lower end (i.e., the end with the pole post) of the inverted battery cell 3. Among them, the first heat exchange plate 11 can also act as a longitudinal beam to improve the overall modal and structural strength of the battery pack.

[0068] Specifically, taking the cooling of battery cell 3 as an example: The battery cell 3 may include a left side wall and a right side wall along the first direction X, and the battery cell 3 may include a top end (i.e., the end provided with the pole post) and a bottom end along the second direction Z. Two adjacent first heat exchange plates 11 can cool the battery cell 3 from the left and right sides. When the battery cell 3 is installed in the accommodation space 17, it is in an inverted state, and the second heat exchange plate 12 can cool the battery cell 3 from the top end of the battery cell 3. That is, with the cooperation of two adjacent heat exchange assemblies 2, the battery cell 3 can be cooled from three sides of the battery cell 3, which can accelerate the cooling speed of the battery cell 3, maintain the balance of the temperature distribution of the battery cell 3, and improve the charging safety during the fast charging process of the battery pack.

[0069] Optionally, as Figure 8 shown, where two adjacent heat exchange assemblies 2 are respectively a first heat exchange assembly 21 and a second heat exchange assembly 22; in the first heat exchange assembly 21, the second heat exchange plate 12 extends from one end of the first heat exchange plate 11 in the second direction Z towards the second heat exchange assembly 22; in the second heat exchange assembly 22, the second heat exchange plate 12 extends from one end of the first heat exchange plate 11 in the second direction Z towards the first heat exchange assembly 21.

[0070] In the embodiment of the present invention, the second heat exchange plate 12 of the first heat exchange assembly 21 extends from one end of the first heat exchange plate 11 in the second direction Z towards the second heat exchange assembly 22, so that the first heat exchange assembly 21 can simultaneously exchange heat with two adjacent sides of the battery cell 3. The second heat exchange plate 12 of the second heat exchange assembly 22 extends from one end of the first heat exchange plate 11 in the second direction Z towards the first heat exchange assembly 21, so that the second heat exchange assembly 22 can simultaneously exchange heat with two adjacent sides of the battery cell 3.

[0071] As Figure 4 and Figure 5 shown, when the battery pack has only one accommodation space 17, the first heat exchange assembly 21 and the second heat exchange assembly 22 can both be in an "L" shape, and the first heat exchange assembly 21 and the second heat exchange assembly 22 can be arranged in reverse. The first heat exchange assembly 21 and the second heat exchange assembly 22 can be arranged in pairs. An accommodation space 17 can be formed by enclosing between the first heat exchange plates 11 of a pair of arranged first heat exchange assemblies 21 and the first heat exchange plates 11 of the second heat exchange assemblies 22.

[0072] Or, as Figure 2 and Figure 3As shown, when the battery pack has two accommodating spaces 17, the first heat exchange component 21 can be a "丄" type structure, and the second heat exchange component 22 can be an "L" type structure. The first heat exchange component 21 can be respectively arranged adjacent to the two second heat exchange components 22, that is, the first heat exchange component 21 is provided with a second heat exchange component 22 on each of the opposite sides of the first direction X. At this time, the first heat exchange component 21 and a second heat exchange component 22 are enclosed to form a accommodating space 17, and the first heat exchange component 21 and another second heat exchange component 22 are enclosed to form a accommodating space 17, that is, the first heat exchange plate 11 of the first heat exchange component 21 has a accommodating space 17 on each of the opposite sides of the first direction X.

[0073] Or, if Figure 2 and Figure 3 As shown, when the battery pack has three or more accommodating spaces 17, the first heat exchange component 21 can be a "丄" type structure, and the second heat exchange component 22 can be an "L" type structure. The number of first heat exchange components 21 is two or more, and the number of second heat exchange components 22 is two. Multiple first heat exchange components 21 are arranged at intervals along the first direction X, and two adjacent first heat exchange components 21 enclose a accommodating space 17. The two second heat exchange components 22 are respectively arranged at both ends of the multiple first heat exchange components 21 along the first direction X, that is, a second heat exchange component 22 is provided on both sides of the head and tail of the multiple first heat exchange components 21 arranged in the first direction X. At this time, a second heat exchange component 22 and a first heat exchange component 21 adjacent to the second heat exchange component 22 enclose a accommodating space 17, and another second heat exchange component 22 and a first heat exchange component 21 adjacent to the second heat exchange component 22 enclose a accommodating space 17.

[0074] Optionally, a second heat exchange component 22 adjacent to the first heat exchange component 21 is provided on both sides; in the first heat exchange component 21, the first heat exchange plate 11 is a first target heat exchange plate 211, the second heat exchange plate 12 is a second target heat exchange plate 212, and the second target heat exchange plate 212 includes a first end 124 and a second end 125 along the first direction X; the first end 124 is arranged on one side of the first target heat exchange plate 211, and extends toward the second heat exchange component 22 on one side of the first target heat exchange plate 211; the second end 125 is arranged on the other side of the first target heat exchange plate 211, and extends toward the second heat exchange component 22 on the other side of the first target heat exchange plate 211, that is, the first heat exchange component 21 is viewed from the third direction Y and has a "丄" type structure.

[0075] In an embodiment of the utility model, the first end 124 extends from the first target heat exchange plate 211 toward the second heat exchange component 22 on one side of the first target heat exchange plate 211, and the second end 125 extends along the first target heat exchange plate 211 toward the second heat exchange component 22 on the other side of the first target heat exchange plate 211, so that the first heat exchange component 21 can form a "丄" type structure, and the first heat exchange component 21 can be used to enclose two different accommodating spaces 17 at the same time. The first heat exchange component 21 can simultaneously perform heat exchange on the battery cells 3 in the two different accommodating spaces 17, which can improve the utilization rate of the first heat exchange component 21, and can reduce the space occupied by the heat exchanger 1 in the first direction X, so as to facilitate reducing the size of the battery pack.

[0076] Specifically, the first end 124 and the second end 125 extend in opposite directions, one extends in the first direction X, and the other extends in the opposite direction of the first direction X.

[0077] Specifically, when the heat exchanger 1 includes at least three heat exchange components 2, the at least three heat exchange components 2 can be arranged in sequence along the first direction X. Along the first direction X, the two heat exchange components 2 located at both ends can be an "L" type structure, and the heat exchange component 2 located in the middle can be a "丄" type structure.

[0078] Optionally, the first direction X, the second direction Z and the third direction Y may intersect in pairs. The embodiment of the utility model only takes the first direction X, the second direction Z and the third direction Y as examples that are perpendicular to each other. The first direction X may be the width direction of the battery pack, the second direction Z may be the thickness direction of the battery pack, and the third direction Y may be the length direction of the battery pack.

[0079] Optionally, the heat exchanger 1 further includes a feed pipe 13 and a discharge pipe 14, the first heat exchange plate 11 is provided with a first collecting portion 111 and a second collecting portion 112 at opposite ends along the third direction Y, and the second heat exchange plate 12 is provided with a third collecting portion 121 and a fourth collecting portion 122 at opposite ends along the third direction Y.

[0080] Optionally, the feed pipe 13 is respectively connected to the first collecting section 111 and the third collecting section 121, and the feed pipe 13 is used to transport the heat exchange medium to the first heat exchange plate 11 and the second heat exchange plate 12, respectively; the discharge pipe 14 is respectively connected to the second collecting section 112 and the fourth collecting section 122, and the discharge pipe 14 is used to discharge the heat exchange medium in the first heat exchange plate 11 and the second heat exchange plate 12.

[0081] In an embodiment of the present utility model, a heat exchange medium can be conveyed into the first heat exchange plate 11 and the second heat exchange plate 12 respectively through the feed pipe 13 via the first manifold 111 and the third manifold 121, and the heat exchange medium in the first heat exchange plate 11 and the second heat exchange plate 12 can be discharged respectively through the discharge pipe 14 via the second manifold 112 and the fourth manifold 122. In this way, the cooling medium can exchange heat with the battery cell 3 during the flowing process, and the reliability of heat exchange between the first heat exchange plate 11 and the second heat exchange plate 12 and the battery cell 3 can be improved.

[0082] Specifically, the feed pipe 13 and the first heat exchange plate 11 can be fixedly connected or integrally formed; the feed pipe 13 and the second heat exchange plate 12 can be fixedly connected or integrally formed; the discharge pipe 14 and the first heat exchange plate 11 can be fixedly connected or integrally formed; the discharge pipe 14 and the second heat exchange plate 12 can be fixedly connected or integrally formed.

[0083] Optionally, the first heat exchange plate 11 is provided with a plurality of first heat exchange channels 113 extending along the third direction Y; wherein, one end of the first manifold 111 is connected to the feed pipe 13 and the other end is respectively connected to the first heat exchange channels 113, and one end of the second manifold 112 is respectively connected to the first heat exchange channels 113 and the other end is connected to the discharge pipe 14.

[0084] In an embodiment of the present utility model, the feed pipe 13 can convey the heat exchange medium to the first heat exchange channels 113 through the first manifold 111, and the heat exchange medium in the first heat exchange channels 113 can be discharged to the discharge pipe 14 through the second manifold 112. Since the first heat exchange channels 113 extend along the third direction Y, it is convenient to increase the flow path of the heat exchange medium, thereby improving the heat exchange effect on the battery cell 3.

[0085] Specifically, the feed pipe 13 is connected and communicated with the first manifold 111, and the feed pipe 13 can convey the heat exchange medium to the first manifold 111; the first manifold 111 is communicated with the first heat exchange channels 113, and the first manifold 111 can convey the heat exchange medium to the first heat exchange channels 113; the first heat exchange channels 113 are communicated with the second manifold 112, and the first heat exchange channels 113 can convey the heat exchange medium to the second manifold 112; the second manifold 112 is communicated with the discharge pipe 14, and the second manifold 112 can convey the heat exchange medium to the discharge pipe 14.

[0086] Specifically, multiple first heat exchange channels 113 all extend along the third direction Y. One end of a single first heat exchange channel 113 is connected to the first manifold 111, and the other end is connected to the second manifold 112. In this way, the first manifold 111 can respectively convey the heat exchange medium to each first heat exchange channel 113; alternatively, multiple first heat exchange channels 113 are connected end to end in sequence, the first manifold 111 is connected to the inlet end of one first heat exchange channel 113, and the second manifold 112 is connected to the outlet end of the last first heat exchange channel 113. In this way, the first manifold 111 can convey the heat exchange medium into one of the first heat exchange channels 113, and it can be realized that the heat exchange medium can flow in each first heat exchange channel 113.

[0087] In some embodiments, the first heat exchange plate 11 is provided with one first heat exchange channel 113. The first heat exchange channel 113 includes a plurality of first channel portions and second channel portions connected between adjacent two first channel portions. Each first channel portion extends along the second direction Z, and a plurality of first channel portions are arranged at intervals along the third direction Y. Adjacent two first channel portions are communicated by the second channel portion. In some embodiments, the second channel portion extends in an arc to connect adjacent two first channel portions, or the second channel portion extends along the third direction Y to connect adjacent two first channel portions.

[0088] Optionally, the second heat exchange plate 12 is provided with multiple second heat exchange channels 123 extending along the third direction Y; along the third direction Y, one end of the second heat exchange plate 12 is provided with a third manifold 121 communicated with the second heat exchange channels 123, and the other end of the second heat exchange plate 12 is provided with a fourth manifold 122 communicated with the second heat exchange channels 123; wherein, the third manifold 121 is connected to the feed pipe 13, and the fourth manifold 122 is connected to the discharge pipe 14.

[0089] In the embodiment of the present utility model, the feed pipe 13 can convey the heat exchange medium to the second heat exchange channels 123 through the third manifold 121, and the heat exchange medium in the second heat exchange channels 123 can be discharged to the discharge pipe 14 through the fourth manifold 122. Since the second heat exchange channels 123 extend along the third direction Y, it is convenient to increase the flow path of the heat exchange medium, thereby improving the heat exchange effect on the battery cell 3.

[0090] Specifically, the feed pipe 13 is connected to and in communication with the third manifold 121. The feed pipe 13 can convey the heat exchange medium to the third manifold 121. The third manifold 121 is in communication with the second heat exchange channel 123. The third manifold 121 can convey the heat exchange medium to the second heat exchange channel 123. The second heat exchange channel 123 is in communication with the fourth manifold 122. The second heat exchange channel 123 can convey the heat exchange medium to the fourth manifold 122. The fourth manifold 122 is in communication with the discharge pipe 14. The fourth manifold 122 can convey the heat exchange medium to the discharge pipe 14.

[0091] Specifically, multiple second heat exchange channels 123 all extend along the third direction Y. One end of each second heat exchange channel 123 is connected to the third manifold 121, and the other end is connected to the fourth manifold 122. In this way, the third manifold 121 can convey the heat exchange medium to each of the second heat exchange channels 123 respectively. Alternatively, multiple second heat exchange channels 123 are connected end to end in sequence, and the third manifold 121 is connected to the inlet end of a first heat exchange channel 113, and the fourth manifold 122 is connected to the outlet end of the last second heat exchange channel 123. In this way, the third manifold 121 can convey the heat exchange medium into one of the second heat exchange channels 123, and it can be realized that the heat exchange medium can flow in each of the second heat exchange channels 123.

[0092] In some embodiments, the second heat exchange plate 12 is provided with one second heat exchange channel 123. The second heat exchange channel 123 includes a plurality of third channel portions and fourth channel portions connecting between adjacent two third channel portions. Each third channel portion extends along the first direction X, and a plurality of third channel portions are arranged at intervals along the third direction Y. Adjacent two third channel portions are communicated by the fourth channel portion. In some embodiments, the fourth channel portion extends in an arc to connect adjacent two third channel portions, or the fourth channel portion extends along the third direction Y to connect adjacent two fourth channel portions.

[0093] Specifically, the feed pipe 13 is respectively connected to the first manifold 111 and the third manifold 121. The feed pipe 13 is used to convey the heat exchange medium to the first heat exchange channel 113 and the second heat exchange channel 123 respectively. The discharge pipe 14 is respectively connected to the second manifold 112 and the fourth manifold 122. The discharge pipe 14 is used to discharge the heat exchange medium in the first heat exchange channel 113 and the second heat exchange channel 123.

[0094] Optionally, the feed pipe 13 may include a first main pipe 131 and at least two first branch pipes 132 correspondingly arranged with the third manifold 121; the first main pipe 131 penetrates through the first manifold 111 and is connected to the first manifold 111; one end of the first branch pipe 132 is connected to the first main pipe 131, and the other end of the first branch pipe 132 is connected to the corresponding third manifold 121; and / or, the discharge pipe 14 includes a second main pipe 141 and at least two second branch pipes 142 correspondingly arranged with the fourth manifold 122; the second main pipe 141 penetrates through the second manifold 112 and is connected to the second manifold 112; one end of the second branch pipe 142 is connected to the second main pipe 141, and the other end of the second branch pipe 142 is connected to the corresponding fourth manifold 122.

[0095] In the embodiment of the present utility model, the heat exchange medium in the first main pipe 131 may first flow to the first manifold 111, then to the first heat exchange channel 113, and then flow into the second manifold 112, and further flow into the second main pipe 141, so that the heat exchange medium in the first heat exchange plate 11 exchanges heat with the battery cell 3. The heat exchange medium in the first main pipe 131 may also sequentially flow to the first branch pipe 132, the third manifold 121, the second heat exchange channel 123, the fourth manifold 122, the second branch pipe 142, and the discharge pipe 14, so that the heat exchange medium in the second heat exchange plate 12 exchanges heat with the battery cell 3.

[0096] Specifically, the first main pipe 131 is connected to the first manifold 111, one end of the first branch pipe 132 is connected to the first main pipe 131, and the other end of the first branch pipe 132 is connected to the third manifold 121, which is convenient for integrating the first heat exchange component 21 and the second heat exchange component 22 into an integrated structure through the feed pipe 13. Similarly, the discharge pipe 14 can also integrate the first heat exchange component 21 and the second heat exchange component 22 into an integrated structure. Moreover, since the feed pipe 13 and the discharge pipe 14 are respectively arranged at both ends of the first heat exchange plate 11, in this way, under the combined action of the feed pipe 13 and the discharge pipe 14, the heat exchanger 1 can be integrated into an integrated structure, and the structural stability is relatively strong. Specifically, the heat exchanger 1 can be integrally formed by extruding aluminum or aluminum alloy materials.

[0097] Specifically, the first main pipe 131 may have a liquid inlet 15, and the liquid inlet 15 may be connected to a feeding device to receive the heat exchange medium; the second main pipe 141 may have a liquid outlet 16, and the liquid outlet 16 may be connected to a recovery device to discharge the heat exchange medium.

[0098] Specifically, after the heat exchange medium enters the first main pipe 131 from the liquid inlet 15, one branch flows out from the liquid outlet 16 through the first manifold 111, the first heat exchange channel 113, the second manifold 112, and the second main pipe 141, and can take away the heat transferred to the first heat exchange plate 11; the other branch flows out from the liquid outlet 16 through the first branch pipe 132, the third manifold 121, the second heat exchange channel 123, the fourth manifold 122, the second branch pipe 142, and the second main pipe 141, and can take away the heat transferred to the second heat exchange plate 12.

[0099] Optionally, the battery pack further includes a first electrical connector 51. The number of battery cells 3 is at least two. Each accommodation space 17 is provided with at least one battery cell 3. When multiple battery cells 3 are arranged in the same accommodation space 17, the multiple battery cells 3 are arranged along the third direction Y. Among two adjacent accommodation spaces 17, the two battery cells 3 at the same end in the third direction Y are respectively a first battery cell 41 and a second battery cell 42; the first heat exchange plate 11 disposed between the first battery cell 41 and the second battery cell 42 is provided with an avoidance portion 114 at at least one end along the second direction Z; the first electrical connector 51 passes through the avoidance portion 114. One end of the first electrical connector 51 is electrically connected to the first battery cell 41, and the other end of the first electrical connector 51 is electrically connected to the second battery cell 42.

[0100] In the embodiment of the present utility model, the first electrical connector 51 passes through the avoidance portion 114, which facilitates the electrical connection of the first electrical connector 51 to the first battery cell 41 and the second battery cell 42 respectively, facilitates the electrical connection between the first battery cell 41 and the second battery cell 42, and further facilitates ensuring the voltage and power of the battery pack.

[0101] In some embodiments, along the first direction X, each of the opposite ends of each first heat exchange plate 11 is provided with an avoidance portion 114 to facilitate the passing and avoidance of the first electrical connector 51.

[0102] Specifically, as Figure 12 shown, the first electrical connector 51 is electrically connected to the first battery cell 41 and the second battery cell 42 respectively to achieve series or parallel connection between the first battery cell 41 and the second battery cell 42, thereby realizing series or parallel connection of the battery cells 3 in two adjacent accommodation spaces 17. The first electrical connector 51 can be a metal part to have good electrical conductivity. The first electrical connector 51 can be spliced by two connecting portions 511 and a transition portion 512 connected between the two connecting portions 511. The transition portion 512 can pass through the avoidance portion 114, or the second electrical connector 52 can also be an integral structure.

[0103] Specifically, as Figure 7As shown, the first battery cell 41 and the second battery cell 42 are arranged in adjacent accommodation spaces 17. The first heat exchange plate 11 disposed between the first battery cell 41 and the second battery cell 42 can simultaneously exchange heat for the first battery cell 41 and the second battery cell 42. The first electrical connector 51 is respectively connected to the first battery cell 41 and the second battery cell 42, and can realize bridging between two adjacent accommodation spaces 17, so as to electrically connect the battery cells 3 in the entire battery pack.

[0104] Specifically, the first heat exchange plate 11 disposed between the first battery cell 41 and the second battery cell 42 can be a preset heat exchange plate. An avoidance portion 114 is provided on the preset heat exchange plate, and the avoidance portion 114 is disposed at the end of the first current collecting portion 111 and / or the second current collecting portion 112 of the preset heat exchange plate in the second direction Z.

[0105] Specifically, the avoidance portion 114 can be a notch or a through hole. The avoidance portion 114 can be provided only on the preset heat exchange plate, or can be provided on each first heat exchange plate 11. Only one avoidance portion 114 can be provided on the preset heat exchange plate, or two or four avoidance portions 114 can be provided, which can be specifically set according to actual needs. Combining Figure 1 and Figure 2 As shown, a case where four avoidance portions 114 are provided on each first heat exchange plate 11 is schematically shown. Other cases can be set with reference, and the embodiments of the present invention will not be described in detail.

[0106] Optionally, the battery cell 3 includes a first pole 31 and a second pole 32; the exposed ends of the first pole 31 and the second pole 32 are both arranged facing the second heat exchange plate 12 and are respectively connected to the second heat exchange plate 12; a first groove 311 is provided on the first pole 31, and a second groove 321 is provided on the second pole 32. The openings of the first groove 311 and the second groove 321 are both arranged facing the second heat exchange plate 12; one end of the first electrical connector 51 is inserted into the first groove 311 of the first battery cell 41, and the other end of the first electrical connector 51 is inserted into the first groove 311 or the second groove 321 of the second battery cell 42.

[0107] In the embodiments of the present invention, the second heat exchange plate 12 can be connected to the first pole 31 and the second pole 32 of the battery cell 3. Since the heat generation amounts of the first pole 31 and the second pole 32 are relatively large, directly exchanging heat for the first pole 31 and the second pole 32 can further improve the heat exchange efficiency and uniformity of the battery cell 3.

[0108] Since the first pole 31 is provided with a first groove 311 with its notch facing the second heat exchange plate 12, and the second pole 32 is provided with a second groove 321 with its notch facing the second heat exchange plate 12, when the first electrical connector 51 is respectively connected to the first battery cell 41 and the second battery cell 42, the first electrical connector 51 can be connected within the first groove 311 or the second groove 321, so that the first groove 311 or the second groove 321 can play a role in avoiding and limiting the first electrical connector 51, thereby improving the convenience of connecting the first electrical connector 51 to the first battery cell 41 and the second battery cell 42 respectively.

[0109] Specifically, the first pole 31 passes through the top cover of the battery cell 3, one end is connected to the battery core inside the housing, and the other end is exposed outside the housing; the second pole 32 also passes through the top cover of the battery cell 3, one end is connected to the battery core inside the housing, and the other end is exposed outside the housing. That is, the first pole 31 and the second pole 32 can be arranged at the top of the battery cell 3. When the battery cell 3 is inverted, the first pole 31 and the second pole 32 are connected to the second heat exchange plate 12.

[0110] Specifically, a glue-blocking strip and a heat-conducting member can be arranged between the first pole 31 and the second heat exchange plate 12. The heat-conducting member is selected from heat-conducting gel or heat-conducting pad, so that the second heat exchange plate 12 exchanges heat with the first pole 31 and the first electrical connector 51. A glue-blocking strip and a heat-conducting member can be arranged between the second pole 32 and the second heat exchange plate 12. The heat-conducting member is selected from heat-conducting gel or heat-conducting pad, so that the second heat exchange plate 12 exchanges heat with the second pole 32 and the first electrical connector 51.

[0111] Specifically, connecting the first electrical connector 51 within the first groove 311 or the second groove 321 can also prevent the first electrical connector 51 from occupying the space of the battery pack in the second direction Z, improving the space utilization rate of the battery pack. Moreover, the distance between the first pole 31, the second pole 32 and the second heat exchange plate 12 can be shortened, facilitating the connection between the first pole 31, the second pole 32 and the second heat exchange plate 12, and improving the heat exchange effect on the battery cell 3.

[0112] Specifically, the first electrical connector 51 and the first battery cell 41 can be connected by welding or bonded by conductive glue; the first electrical connector 51 and the second battery cell 42 can be connected by welding or bonded by conductive glue.

[0113] For example, one end of the first electrical connector 51 can be connected within the first groove 311 of the first battery cell 41, and the other end can be connected within the first groove 311 of the second battery cell 42, so that the first terminal 31 of the first battery cell 41 and the first terminal 31 of the second battery cell 42 are electrically connected; alternatively, one end of the first electrical connector 51 can be connected within the first groove 311 of the first battery cell 41, and the other end can be connected within the second groove 321 of the second battery cell 42, so that the first terminal 31 of the first battery cell 41 and the second terminal 32 of the second battery cell 42 are electrically connected.

[0114] Specifically, the first groove 311 can be a U-shaped structure or an L-shaped structure, the second groove 321 can be a U-shaped structure or an L-shaped structure, and the shapes of the first groove 311 and the second groove 321 can be the same or different.

[0115] Specifically, the sizes of the first groove 311 and the second groove 321 are adapted to the size of the first electrical connector 51, so that the first electrical connector 51 can substantially fill the first groove 311, that is, the thickness of the first electrical connector 51 can be less than or equal to the grooving height of the first groove 311, which is convenient for reasonably utilizing the space of the battery pack.

[0116] Specifically, the first terminal 31 and the second terminal 32 are two terminals with opposite polarities, that is, one of the first terminal 31 and the second terminal 32 is a positive terminal, and the other is a negative terminal. An accommodation space 17 can be enclosed by two adjacent second heat exchange plates 12. One of the two second heat exchange plates 12 is connected to the first terminal 31 to provide support and heat exchange for the first terminal 31, and the other is connected to the second terminal 32 to provide support and heat exchange for the second terminal 32.

[0117] In some other alternative embodiments of the present utility model, the battery pack further includes a second electrical connector 52. A plurality of battery cells 3 in the same accommodation space 17 are arranged along the third direction Y. The battery cells 3 are inverted in the accommodation space 17, that is, the first pole 31 and the second pole 32 of the battery cell 3 face the second heat exchange plate 12. A first groove 311 is provided on the first pole 31, and a second groove 321 is provided on the second pole 32. The openings of the first groove 311 and the second groove 321 both face the second heat exchange plate 12. In the same accommodation space 17, one end of the second electrical connector 52 is connected to the first groove 311 of one of the two adjacent battery cells 3, and the other end is connected to the first groove 311 or the second groove 321 of the other, so as to realize the series or parallel connection of a plurality of battery cells 3 in the same accommodation space 17. For example, two adjacent battery cells 3 in the same accommodation space 17 are the third battery cell 43 and the fourth battery cell 44 respectively. One end of the second electrical connector 52 is connected to the first groove 311 of the third battery cell 43, and the other end of the second electrical connector 52 is connected to the first groove 311 or the second groove 321 of the fourth battery cell 44.

[0118] In the embodiment of the present utility model, one end of the second electrical connector 52 is connected to the first groove 311 of the third battery cell 43, and the other end of the second electrical connector 52 is connected to the first groove 311 or the second groove 321 of the fourth battery cell 44, which is convenient for realizing the parallel or series connection between the third battery cell 43 and the fourth battery cell 44. The first groove 311 or the second groove 321 can be used to avoid and limit the second electrical connector 52, and further improve the convenience of connecting the second electrical connector 52 to the third battery cell 43 and the fourth battery cell 44 respectively.

[0119] Specifically, one end of the second electrical connector 52 is connected to the first groove 311 of the third battery cell 43, and the other end can be connected to the second groove 321 of the fourth battery cell 44, which can realize the series connection of the third battery cell 43 and the fourth battery cell 44. One end of the second electrical connector 52 is connected to the first groove 311 of the third battery cell 43, and the other end can be connected to the first groove 311 of the fourth battery cell 44, which can realize the parallel connection of the third battery cell 43 and the fourth battery cell 44.

[0120] Specifically, the sizes of the first groove 311 and the second groove 321 are adapted to the size of the second electrical connector 52, so that the second electrical connector 52 can basically fill the first groove 311, that is, the thickness of the second electrical connector 52 is less than or equal to the grooving height of the first groove 311 and the second groove 321, which is convenient for reasonably utilizing the space of the battery pack.

[0121] Specifically, the second electrical connector 52 can be a metal part to have good electrical conductivity. In the embodiments of the present invention, the shape and size of the second electrical connector 52 are not specifically limited. In combination with Figures 9 to 11 , a case where the second electrical connector 52 is an aluminum sheet is illustrated, and other settings can be referred to.

[0122] Optionally, the second electrical connector 52 is connected to the second heat exchange plate 12 so that the second heat exchange plate 12 exchanges heat with the second electrical connector 52, thereby further improving the heat exchange effect of the heat exchanger 1 on the battery cell 3.

[0123] Optionally, the battery cell 3 further includes an explosion-proof valve 33; the explosion-proof valve 33 is disposed between the first pole 31 and the second pole 32. That is, the explosion-proof valve 33 is disposed on the top cover of the battery cell 3 and is located between the first pole 31 and the second pole 32.

[0124] In the embodiments of the present invention, the first pole 31, the second pole 32 are connected to two second heat exchange plates 12 that are used to enclose the same accommodation space 17, so that the two second heat exchange plates 12 can lift the battery cell 3, and the gap between two adjacent second heat exchange plates 12 can reserve a space for the explosion-proof valve 33 to relieve pressure and drain liquid.

[0125] Optionally, as Figure 6 shown, the battery pack further includes a housing 6, and the housing 6 can include an upper cover 61 and a lower cover 62; the battery cell 3 and the heat exchanger 1 can both be disposed in the housing 6; the battery cell 3 includes a first side and a second side opposite to each other along the second direction Z, the first side is connected to the upper cover 61; the second side is provided with a first pole 31 and a second pole 32, both the first pole 31 and the second pole 32 are connected to the second heat exchange plate 12, and the side of the second heat exchange plate 12 away from the battery cell 3 is connected to the lower cover 62, so that the battery cell 3 can be inverted, which is beneficial to improving the heat exchange effect on the battery cell 3.

[0126] Optionally, the housing 6 further includes a circumferential side plate 63; one end of the circumferential side plate 63 is connected to the upper cover 61, the other end of the circumferential side plate 63 is connected to the lower cover 62, and the circumferential side plate 63, the upper cover 61 and the lower cover 62 enclose an accommodation cavity; the battery cell 3 and the heat exchanger 1 are both disposed in the accommodation cavity.

[0127] In the embodiments of the present invention, the upper cover 61, the lower cover 62 and the circumferential side plate 63 can be combined to form the housing 6 of the battery pack, which can play a role in protecting and fixing the battery cell 3 and the heat exchanger 1. Specifically, a support foam 7 can also be disposed between the heat exchanger 1 and the lower cover 62.

[0128] Specifically, the upper cover 61 and the lower cover 62 are arranged opposite to and parallel with each other. The embodiments of the present invention do not specifically limit the connection manners between the circumferential side plate 63 and the upper cover 61 and between the circumferential side plate 63 and the lower cover 62.

[0129] The battery pack described in the embodiments of the present invention has at least the following advantages:

[0130] In the embodiments of the present invention, the side wall of the battery cell 3 in the first direction X is connected to the first heat exchange plate 11, so that the first heat exchange plate 11 can exchange heat with the side wall of the battery cell 3 in the first direction X. The end of the battery cell 3 in the second direction Z is connected to the second heat exchange plate 12, so that the second heat exchange plate 12 can exchange heat with the end of the battery cell 3 in the second direction Z. In this way, the heat exchanger 1 can exchange heat with the battery cell 3 from multiple sides of the battery cell 3, which can improve the heat exchange speed of the battery cell 3 and is convenient for ensuring the safety of the battery pack. Moreover, by exchanging heat from multiple sides of the battery cell 3 respectively, the uniformity of the internal temperature distribution of the battery cell 3 can also be improved. The first heat exchange plate 11 can also act as a longitudinal beam to improve the overall mode and structural strength of the battery pack.

[0131] In a second aspect, the embodiments of the present invention also disclose an electrical device, which may specifically include the above-mentioned battery pack.

[0132] The electrical device may be a mobile phone, a computer, a new energy vehicle, etc.

[0133] The electrical device described in the embodiments of the present invention has at least the following advantages:

[0134] In the embodiments of the present invention, the side wall of the battery cell 3 in the first direction X is connected to the first heat exchange plate 11, so that the first heat exchange plate 11 can exchange heat with the side wall of the battery cell 3 in the first direction X. The end of the battery cell 3 in the second direction Z is connected to the second heat exchange plate 12, so that the second heat exchange plate 12 can exchange heat with the end of the battery cell 3 in the second direction Z. In this way, the heat exchanger 1 can exchange heat with the battery cell 3 from multiple sides of the battery cell 3, which can improve the heat exchange speed of the battery cell 3 and is convenient for ensuring the safety of the battery pack. Moreover, by exchanging heat from multiple sides of the battery cell 3 respectively, the uniformity of the internal temperature distribution of the battery cell 3 can also be improved.

[0135] The above has introduced in detail a battery pack and an electrical device provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A battery pack, characterized in that: Having a first direction and a second direction intersecting the first direction, comprising: A heat exchanger (1), comprising at least two heat exchange components (2), wherein: Each of the heat exchange components (2) comprises a first heat exchange plate (11) and a second heat exchange plate (12) connected to the first heat exchange plate (11), wherein the first heat exchange plate (11) and the second heat exchange plate (12) intersect; Along the first direction, two adjacent first heat exchange plates (11) are spaced apart and arranged opposite to each other, and a first distance exists between the two adjacent first heat exchange plates (11); two adjacent second heat exchange plates (12) are spaced apart and arranged opposite to each other, and a second distance exists between the two adjacent second heat exchange plates (12), and the second distance is smaller than the first distance; Two adjacent first heat exchange plates (11) and the second heat exchange plate (12) between the two adjacent first heat exchange plates (11) enclose a receiving space (17); A battery cell (3), wherein the battery cell (3) is arranged in a receiving space (17), the side wall of the battery cell (3) in the first direction is connected to the first heat exchange plate (11), and the end of the battery cell (3) in the second direction is connected to the second heat exchange plate (12).

2. The battery pack according to claim 1, characterized in that: The two adjacent heat exchange components (2) are respectively a first heat exchange component (21) and a second heat exchange component (22); In the first heat exchange component (21), the second heat exchange plate (12) extends from one end of the first heat exchange plate (11) in the second direction toward the second heat exchange component (22); In the second heat exchange assembly (22), the second heat exchange plate (12) extends from one end of the first heat exchange plate (11) in the second direction toward the first heat exchange assembly (21).

3. The battery pack according to claim 2, characterized in that: The second heat exchange component (22) adjacent to the first heat exchange component (21) is disposed on both sides of the first heat exchange component (21); In the first heat exchange assembly (21), the first heat exchange plate (11) is a first target heat exchange plate (211), the second heat exchange plate (12) is a second target heat exchange plate (212), and the second target heat exchange plate (212) includes a first end (124) and a second end (125) along the first direction; The first end (124) is arranged on one side of the first target heat exchange plate (211) and extends toward the second heat exchange component (22) on one side of the first target heat exchange plate (211); the second end (125) is arranged on the other side of the first target heat exchange plate (211) and extends toward the second heat exchange component (22) on the other side of the first target heat exchange plate (211).

4. The battery pack according to claim 1, characterized in that: The battery pack further has a third direction, and the first direction, the second direction, and the third direction intersect each other; The first heat exchange plate (11) is provided with a plurality of first heat exchange channels (113) extending along the third direction, and the second heat exchange plate (12) is provided with a plurality of second heat exchange channels (123) extending along the third direction; Along the third direction, one end of the first heat exchange plate (11) is provided with a first header (111) communicating with the first heat exchange channel (113), and the other end of the first heat exchange plate (11) is provided with a second header (112) communicating with the first heat exchange channel (113). ； A third header (121) communicating with the second heat exchange channel (123) is provided at one end of the second heat exchange plate (12), and a fourth header (122) communicating with the second heat exchange channel (123) is provided at the other end of the second heat exchange plate (12); The heat exchanger (1) further comprises a feed pipe (13) and a discharge pipe (14); The feed pipe (13) is connected to the first header (111) and the third header (121) respectively, and the feed pipe (13) is used to transport the heat exchange medium to the first heat exchange channel (113) and the second heat exchange channel (123) respectively; The discharge pipe (14) is connected to the second header (112) and the fourth header (122) respectively, and the discharge pipe (14) is used to discharge the heat exchange medium in the first heat exchange channel (113) and the second heat exchange channel (123).

5. The battery pack according to claim 4, characterized in that: The feed pipe (13) comprises a first main pipe (131) and at least two first branch pipes (132) arranged corresponding to the third header (121); the first main pipe (131) is passed through the first header (111) and connected to the first header (111); one end of the first branch pipe (132) is connected to the first main pipe (131), and the other end of the first branch pipe (132) is connected to the corresponding third header (121); And / or, the discharge pipe (14) includes a second main pipe (141) and at least two second branch pipes (142) arranged corresponding to the fourth collecting section (122); the second main pipe (141) is passed through the second collecting section (112) and connected to the second collecting section (112); one end of the second branch pipe (142) is connected to the second main pipe (141), and the other end of the second branch pipe (142) is connected to the corresponding fourth collecting section (122).

6. The battery pack according to claim 4, characterized in that: The battery pack further comprises a first electrical connector (51); in two adjacent accommodating spaces (17), the battery cells (3) located at the same end in the third direction are respectively a first battery cell (41) and a second battery cell (42); The first heat exchange plate (11) disposed between the first battery cell (41) and the second battery cell (42) is provided with a relief portion (114) at at least one end along the second direction; The first electrical connector (51) is inserted into the avoidance portion (114), one end of the first electrical connector (51) is electrically connected to the first battery cell (41), and the other end of the first electrical connector (51) is electrically connected to the second battery cell (42).

7. The battery pack according to claim 6, characterized in that: The battery cell (3) comprises a first pole (31) and a second pole (32); The exposed ends of the first pole (31) and the second pole (32) are both arranged toward the second heat exchange plate (12) and are respectively connected to the second heat exchange plate (12); The first pole (31) is provided with a first groove (311), and the second pole (32) is provided with a second groove (321), and the notches of the first groove (311) and the second groove (321) are both arranged toward the second heat exchange plate (12); One end of the first electrical connector (51) is inserted into the first groove (311) of the first battery cell (41), and the other end of the first electrical connector (51) is inserted into the first groove (311) or the second groove (321) of the second battery cell (42).

8. The battery pack according to claim 4, characterized in that: The battery pack further comprises a second electrical connector (52), and the plurality of battery cells (3) in the same accommodating space (17) are arranged along the third direction; The battery cell (3) is inverted in the accommodating space (17), the battery cell (3) having a first pole (31) and a second pole (32), the first pole (31) and the second pole (32) being arranged toward the second heat exchange plate (12), the first pole (31) being provided with a first groove (311), the second pole (32) being provided with a second groove (321), and the notches of the first groove (311) and the second groove (321) being both arranged toward the second heat exchange plate (12); In the same accommodating space (17), one end of the second electrical connector (52) is connected to the first groove (311) of one of the two adjacent battery cells (3). 、 The other end is connected to the first groove (311) or the second groove (321) of the other.

9. The battery pack according to claim 8, characterized in that: The second electrical connector (52) is connected to the second heat exchange plate (12).

10. The battery pack according to claim 1, characterized in that: The battery pack further comprises a housing (6), wherein the housing (6) comprises an upper cover (61) and a lower cover (62); The battery cell (3) and the heat exchanger (1) are both arranged in the housing (6); The battery cell (3) has a first side and a second side opposite to each other along the second direction, and the first side is connected to the upper cover (61); The second side is provided with a first pole (31) and a second pole (32), the first pole (31) and the second pole (32) are both connected to the second heat exchange plate (12), and the side of the second heat exchange plate (12) away from the battery cell (3) is connected to the lower cover (62).

11. An electrical device, characterized in that: The battery pack according to any one of claims 1 to 10.

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