Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, and relates to the technical field of new energy development. The battery pack comprises battery cells and a heat exchange plate, the battery cells comprise a first battery cell and a second battery cell which are adjacent, the heat exchange plate is bent in a reciprocating mode to form a first containing groove and a second containing groove, notches of the first containing groove and notches of the second containing groove are arranged oppositely, the first containing groove and the second containing groove are located in the two opposite surfaces of the heat exchange plate respectively, and the first battery cell is contained in the first containing groove. And the second battery cell is accommodated in the second accommodating groove. According to the battery pack and the electric equipment, the battery pack and the electric equipment meet the structure, so that heat transfer between two adjacent battery cells can be blocked while heat exchange between the heat exchange piece and the heating battery cells is facilitated, and heat is prevented from being diffused between the battery cells.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy development, and in particular to a battery pack and electrical equipment. Background Art

[0002] In recent years, power battery technology has developed rapidly, and there are endless technologies for thermal management and thermal safety protection of batteries. Usually, thermal management is achieved by setting up a cold plate in the battery pack, and thermal insulation materials are added between the cells to achieve thermal safety protection. However, after the thermal runaway of the cell, it is impossible to completely block the heat transfer of adjacent cells. Heat will still be transferred from the upper cold plate or the lower part to the adjacent cell. When multiple cells are out of control at the same time, the instantaneous heat accumulation causes the thermal materials between the cells to be unable to block the heat transfer, causing the cells to spread one after another. Utility Model Content

[0003] The utility model aims to provide a battery pack and electrical equipment, which solve the problem of heat transfer from the battery core to other positions.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a battery pack, comprising: battery cells, the battery cells comprising adjacent first and second battery cells; a heat exchange plate, the heat exchange plate being reciprocatingly bent to form a first accommodating groove and a second accommodating groove with notches disposed opposite to each other, the first accommodating groove and the second accommodating groove being respectively located on two opposite surfaces of the heat exchange plate, the first battery cell being accommodated in the first accommodating groove, and the second battery cell being accommodated in the second accommodating groove.

[0006] In one embodiment, the battery cell has a top surface and a bottom surface facing each other, the top surface is provided with a pole, and the battery cell also has a side surface, the side surface is connected to both the top surface and the bottom surface, the side surface of the first battery cell and the side surface of the second battery cell are arranged opposite to each other in a first direction, the side surface of the first battery cell is in contact with the inner wall of the first receiving groove, and the side surface of the second battery cell is in contact with the inner wall of the second receiving groove.

[0007] In one embodiment, in a direction from a top surface of the first battery core to a bottom surface of the first battery core, a length of the heat exchange plate is greater than or equal to a length of a side surface of the first battery core.

[0008] In one embodiment, the number of the first battery cells and the number of the second battery cells are both plural, and in the first direction, the first battery cells and the second battery cells are alternately arranged, and the first accommodating grooves and the second accommodating grooves are alternately arranged.

[0009] In one embodiment, the top surface of the battery cell is rectangular in shape, the inner wall of the first receiving groove is in contact with three adjacent side surfaces of the first battery cell in sequence, and the maximum depth of the first receiving groove is greater than or equal to the length of the side of the top surface of the first battery cell perpendicular to the first direction.

[0010] In one embodiment, the battery pack further includes a first adhesive and a second adhesive, the first battery cell has a first side surface, the first side surface is spaced apart from an inner wall of the first receiving groove, the first adhesive is connected to the first side surface, the second battery cell has a second side surface, the second side surface is spaced apart from an inner wall of the second receiving groove, and the second adhesive is connected to the second side surface.

[0011] In one embodiment, the top surface of the battery cell is circular in shape, the inner wall of the first receiving groove is in contact with the side surface of the first battery cell, and the maximum depth of the first receiving groove is greater than or equal to the radius of the top surface of the first battery cell.

[0012] In one embodiment, the multiple first battery cells and the multiple second battery cells alternately arranged in the first direction constitute a battery cell row, and the battery pack includes at least two battery cell rows, and the at least two battery cell rows are arranged sequentially in the second direction, the second direction is perpendicular to the first direction, and the heat exchange plate is provided between the battery cells of two adjacent battery cell rows.

[0013] In one embodiment, in the second direction, the first battery cells of two adjacent battery cell rows are arranged relative to each other, or the first battery cells of one battery cell row are arranged relative to the interval area between the first battery cells and the second battery cells of another battery cell row.

[0014] In one embodiment, in a single row of battery cells, there is a first gap between the first battery cell and the outer surface of the second receiving groove, and there is a second gap between the second battery cell and the outer surface of the first receiving groove, and the battery pack further includes a first elastic member and a second elastic member, the first elastic member is filled in the first gap, and the second elastic member is filled in the second gap.

[0015] In a second aspect, the utility model further provides an electrical device, comprising an electrical device and a battery pack as described in any one of the above embodiments, wherein the electrical device is electrically connected to the battery pack.

[0016] The battery pack provided by the utility model includes a battery cell and a heat exchange plate, wherein the battery cell includes a first battery cell and a second battery cell adjacent to each other, and the heat exchange plate is reciprocatingly bent to form a first receiving groove and a second receiving groove with notches arranged opposite to each other. The first receiving groove and the second receiving groove are respectively located on two opposite surfaces of the heat exchange plate, the first battery cell is accommodated in the first receiving groove, and the second battery cell is accommodated in the second receiving groove, so that the heat exchange plate is located between the adjacent first battery cell and the second battery cell, and the first battery cell and the second battery cell are separated, so that the heat exchange plate blocks the heat transfer between the adjacent battery cells, and avoids the heat transfer in the battery pack causing the battery cells to thermally run away successively; and the heat exchange plate is sandwiched between the adjacent first battery cell and the second battery cell, which is conducive to fixing the relative position between the heat exchange plate and the battery cell, and ensuring the structural stability of the heat exchange plate and the battery cell. In addition, when the first battery cell and the second battery cell are in thermal runaway at the same time, the first battery cell exchanges heat with the inner wall of the first receiving groove, and the second battery cell exchanges heat with the inner wall of the second receiving groove, which is conducive to improving the heat exchange efficiency of the battery pack and realizing the efficient integration of battery thermal management and thermal safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic structural diagram of a battery pack according to a first embodiment;

[0019] Figure 2 is a schematic structural diagram of a battery pack according to a second embodiment;

[0020] Figure 3 is a schematic structural diagram of a battery pack according to a third embodiment;

[0021] Figure 4 It is a schematic diagram of the structure of a battery cell according to an implementation method.

[0022] Description of reference numerals:

[0023] 10-battery cell, 11-first battery cell, 111-first side surface, 12-second battery cell, 121-second side surface, 13-pole, 14-top surface, 15-bottom surface, 16-side surface;

[0024] 20-heat exchange plate, 21-first containing tank, 22-second containing tank;

[0025] 31-first adhesive member, 32-second adhesive member;

[0026] 41-first gap, 42-second gap;

[0027] 51-first elastic member, 52-second elastic member. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] The utility model embodiment provides a battery pack, see Figure 1 , Figure 2 and Figure 3 The battery pack includes a battery cell 10 and a heat exchange plate 20. The battery cell 10 includes a first battery cell 11 and a second battery cell 12 adjacent to each other. The heat exchange plate 20 is reciprocatingly bent to form a first receiving groove 21 and a second receiving groove 22 with grooves facing each other, that is, the opening directions of the first receiving groove 21 and the second receiving groove 22 are facing each other. The first receiving groove 21 and the second receiving groove 22 have a common side wall, and the side walls of the first receiving groove 21 and the second receiving groove 22 can be fixedly connected or be an integrated structure.

[0035] The first receiving groove 21 and the second receiving groove 22 are respectively located on two opposite surfaces of the heat exchange plate 20, the first battery cell 11 is accommodated in the first receiving groove 21, and the second battery cell 12 is accommodated in the second receiving groove 22, so that the heat exchange plate 20 is located between the adjacent first battery cell 11 and the second battery cell 12, and the first battery cell 11 and the second battery cell 12 are separated, so that the heat exchange plate 20 blocks the heat transfer between the adjacent battery cells 10, avoiding the heat transfer in the battery pack and causing the battery cells 10 to thermally run away successively; and the heat exchange plate 20 is sandwiched between the adjacent first battery cell 11 and the second battery cell 12, which is conducive to fixing the relative position between the heat exchange plate 20 and the battery cell 10, and ensuring the structural stability of the heat exchange plate 20 and the battery cell 10. In addition, when the first battery cell 11 and the second battery cell 12 experience thermal runaway at the same time, the first battery cell 11 exchanges heat with the inner wall of the first receiving groove 21, and the second battery cell 12 exchanges heat with the inner wall of the second receiving groove 22, which is beneficial to improving the heat exchange efficiency of the battery pack and realizing efficient integration of battery thermal management and thermal safety protection.

[0036] Specifically, when the first battery cell 11 generates heat, the heat of the first battery cell 11 is transferred to the side wall of the first receiving groove 21, so that the side wall of the first receiving groove 21 dissipates heat for the first battery cell 11 to prevent the first battery cell 11 from thermal runaway. At the same time, since the second battery cell 12 is accommodated in the second receiving groove 22, the heat of the first battery cell 11 is dissipated through the heat exchange plate 20, and the heat is prevented from being transferred to the second battery cell 12. When the first battery cell 11 and the second battery cell 12 generate heat at the same time, the heat of the first battery cell 11 is transferred to the side wall of the first receiving groove 21, and the heat of the second battery cell 12 is transferred to the side wall of the second receiving groove 22, so that the first battery cell 11 and the second battery cell 12 can dissipate heat through the heat exchange plate 20 at the same time, and the heat of the first battery cell 11 and the heat of the second battery cell 12 will not be transferred to each other, thereby improving the heat exchange efficiency of the battery pack and realizing efficient integration of battery thermal management and thermal safety protection.

[0037] Optionally, the heat exchange plate 20 further includes a phase change medium contained inside the heat exchange plate 20. The phase change medium may be a low-temperature phase change material, including but not limited to paraffin, fatty acids and their derivatives, sodium silicate, etc. When the heating temperature of the battery cell 10 is high, the phase change material decomposes and absorbs heat, or, after the decomposition reaction occurs, water vaporization is used to absorb heat.

[0038] Optionally, the material of the heat exchange plate 20 includes but is not limited to polyimide, polytetrafluoroethylene or polyetheretherketone, which is helpful to prevent leakage of endothermic phase change materials during the thermal management process and avoid damage to the heat exchange plate 20 during the continuous endothermic-exothermic conversion process.

[0039] The battery pack includes a battery cell 10 and a heat exchange plate 20, the battery cell 10 includes adjacent first and second battery cells 11 and 12, and the heat exchange plate 20 is reciprocatingly bent to form a first receiving groove 21 and a second receiving groove 22 with grooves facing each other, that is, the opening directions of the first receiving groove 21 and the second receiving groove 22 are facing each other, the first receiving groove 21 and the second receiving groove 22 have a common side wall, and the side walls of the first receiving groove 21 and the second receiving groove 22 can be fixedly connected or be an integrated structure.

[0040] The first receiving groove 21 and the second receiving groove 22 are respectively located on two opposite surfaces of the heat exchange plate 20, the first battery cell 11 is accommodated in the first receiving groove 21, and the second battery cell 12 is accommodated in the second receiving groove 22, so that the heat exchange plate 20 is located between the adjacent first battery cell 11 and the second battery cell 12, and the first battery cell 11 and the second battery cell 12 are separated, so that the heat exchange plate 20 blocks the heat transfer between the adjacent battery cells 10, avoiding the heat transfer in the battery pack and causing the battery cells 10 to thermally run away successively; and the heat exchange plate 20 is sandwiched between the adjacent first battery cell 11 and the second battery cell 12, which is conducive to fixing the relative position between the heat exchange plate 20 and the battery cell 10, and ensuring the structural stability of the heat exchange plate 20 and the battery cell 10. In addition, when the first battery cell 11 and the second battery cell 12 experience thermal runaway at the same time, the first battery cell 11 exchanges heat with the inner wall of the first receiving groove 21, and the second battery cell 12 exchanges heat with the inner wall of the second receiving groove 22, which is beneficial to improving the heat exchange efficiency of the battery pack and realizing efficient integration of battery thermal management and thermal safety protection.

[0041] In one implementation, see Figure 1 , Figure 2 , Figure 3 and Figure 4The battery cell 10 has a top surface 14 and a bottom surface 15 facing each other, and the top surface 14 is provided with a pole 13. The battery cell 10 also has a side surface 16, and the side surface 16 is connected to both the top surface 14 and the bottom surface 15. The side surface 16 of the first battery cell 11 and the side surface 16 of the second battery cell 12 are arranged opposite to each other in the first direction, and the side surface 16 of the first battery cell 11 is in contact with the inner wall of the first receiving groove 21, and the side surface 16 of the second battery cell 12 is in contact with the inner wall of the second receiving groove 22, that is, the heat exchange plate 20 is not in contact with the surface of the battery cell 10 having the pole 13, so that the pole 13 and the heat exchange plate 20 are not coplanar, which is conducive to avoiding interference between the heat exchange plate 20 and the pole 13, and avoiding the heat exchange plate 20 affecting the connection between the pole 13 and other structures.

[0042] Optionally, in the direction from the top surface 14 of the first battery cell 11 to the bottom surface 15 of the first battery cell 11, the length of the heat exchange plate 20 is greater than or equal to the length of the side surface 16 of the first battery cell 11, so that the contact area between the heat exchange plate 20 and the first battery cell 11 is larger, thereby making the heat exchange area of ​​the first battery cell 11 larger, which is conducive to improving the heat exchange efficiency of the heat exchange plate 20 and further preventing thermal runaway of the first battery cell 11. Correspondingly, in the direction from the top surface 14 of the second battery cell 12 to the bottom surface 15 of the second battery cell 12, the length of the heat exchange plate 20 is greater than or equal to the length of the side surface 16 of the second battery cell 12, thereby making the heat exchange area of ​​the second battery cell 12 larger, which is conducive to improving the heat exchange efficiency of the heat exchange plate 20.

[0043] Preferably, in the direction from the top surface 14 of the first battery cell 11 to the bottom surface 15 of the first battery cell 11, the length of the heat exchange plate 20 is equal to the length of the side surface 16 of the first battery cell 11, and in the direction from the top surface 14 of the second battery cell 12 to the bottom surface 15 of the second battery cell 12, the length of the heat exchange plate 20 is equal to the length of the side surface 16 of the second battery cell 12. This is beneficial to avoid interference between the portion of the heat exchange plate 20 protruding from the first battery cell 11 and / or the second battery cell 12 and other structures in the battery pack, and is also beneficial to reducing the cost of the heat exchange plate 20.

[0044] Optionally, the number of first battery cells 11 and the number of second battery cells 12 are both multiple, and in the first direction, the first battery cells 11 and the second battery cells 12 are alternately arranged, and the first receiving grooves 21 and the second receiving grooves 22 are alternately arranged, so that when the number of battery cells 10 in the battery pack is more than two, two adjacent battery cells 10 in the battery pack are separated by the heat exchange plate 20, so that the heat exchange plate 20 blocks the heat transfer between adjacent battery cells 10, thereby preventing heat transfer in the battery pack from causing thermal runaway of the battery cells 10; at the same time, when any first battery cell 11 and / or the second battery cell 12 generates heat, the inner wall of the corresponding first receiving groove 21 and / or the inner wall of the second receiving groove 22 are used for heat exchange, thereby improving the heat exchange efficiency of the battery pack and realizing efficient integration of battery thermal management and thermal safety protection.

[0045] In one implementation, see Figure 1 , Figure 2 and Figure 3 , the top surface 14 of the battery cell 10 is in a rectangular shape, and the battery cell 10 is in a rectangular shape. The battery cell 10 has six surfaces that are adjacent to each other in sequence, and the shapes of the surfaces are all rectangular.

[0046] The inner wall of the first receiving groove 21 fits with the three adjacent side surfaces 16 of the first battery cell 11 in sequence, and the maximum depth of the first receiving groove 21 is greater than or equal to the length of the side length of the top surface 14 of the first battery cell 11 perpendicular to the first direction, so that the fitting area between the inner wall of the first receiving groove 21 and the first battery cell 11 is larger, that is, the contact area between the heat exchange plate 20 and the first battery cell 11 is larger, so that the heat exchange area of ​​the first battery cell 11 is larger, which is conducive to improving the heat exchange efficiency of the heat exchange plate 20 and further preventing the thermal runaway of the first battery cell 11. Correspondingly, the inner wall of the second receiving groove 22 fits with the three adjacent side surfaces 16 of the second battery cell 12 in sequence, and the maximum depth of the second receiving groove 22 is greater than or equal to the length of the side length of the top surface 14 of the second battery cell 12 perpendicular to the first direction, so that the heat exchange area of ​​the second battery cell 12 is larger, which is conducive to improving the heat exchange efficiency of the heat exchange plate 20.

[0047] Preferably, the maximum depth of the first accommodating groove 21 is equal to the length of the side of the top surface 14 of the first battery cell 11 perpendicular to the first direction, and the maximum depth of the second accommodating groove 22 is equal to the length of the side of the top surface 14 of the second battery cell 12 perpendicular to the first direction. This is beneficial to avoid interference between the portion of the heat exchange plate 20 protruding from the first battery cell 11 and / or the second battery cell 12 and other structures in the battery pack, and is also beneficial to reducing the cost of the heat exchange plate 20.

[0048] Optionally, the battery pack further includes a first adhesive 31 and a second adhesive 32, the first battery cell 11 has a first side surface 111, the first side surface 111 is spaced apart from the inner wall of the first receiving groove 21, the first adhesive 31 is connected to the first side surface 111, the second battery cell 12 has a second side surface 121, the second side surface 121 is spaced apart from the inner wall of the second receiving groove 22, the second adhesive 32 is connected to the second side surface 121, the first adhesive 31 and the second adhesive 32 are used to fix the relative positions of the first battery cell 11 and the second battery cell 12 in the battery pack, and the heat exchange plate 20 is clamped between the first battery cell 11 and the second battery cell 12, so that the positions of the heat exchange plate 20 and the battery cell 10 remain relatively stable.

[0049] Optionally, the battery pack includes a tray and an upper cover, the first adhesive 31 connects the first side 111 and the upper cover, and the second adhesive 32 connects the second side 121 and the tray, so that the positions of the heat exchange plate 20, the first battery cell 11, and the second battery cell 12 are relatively stable with the tray and the upper cover; at the same time, it is helpful to save the materials of the first adhesive 31 and the second adhesive 32, which is helpful to reduce costs. The first adhesive 31 and the second adhesive 32 can be structural adhesives.

[0050] In one implementation, see Figure 1 , Figure 2 and Figure 3 , the top surface 14 of the battery cell 10 is circular, then the shape of the battery cell 10 is a cylinder, and both the top surface 14 and the bottom surface 15 of the battery cell 10 are circular.

[0051] The inner wall of the first receiving groove 21 fits with the side surface 16 of the first battery cell 11, and the maximum depth of the first receiving groove 21 is greater than or equal to the radius of the top surface 14 of the first battery cell 11. This makes the fitting area between the inner wall of the first receiving groove 21 and the first battery cell 11 larger, that is, the contact area between the heat exchange plate 20 and the first battery cell 11 is larger, so that the heat exchange area of ​​the first battery cell 11 is larger, which is conducive to improving the heat exchange efficiency of the heat exchange plate 20 and further preventing the first battery cell 11 from thermal runaway. Correspondingly, the inner wall of the second receiving groove 22 fits with the side surface 16 of the second battery cell 12, and the maximum depth of the second receiving groove 22 is greater than or equal to the radius of the top surface 14 of the second battery cell 12, so that the heat exchange area of ​​the second battery cell 12 is larger, which is conducive to improving the heat exchange efficiency of the heat exchange plate 20.

[0052] Optionally, the maximum depth of the first accommodating groove 21 is equal to the radius of the top surface 14 of the first battery cell 11, and the maximum depth of the second accommodating groove 22 is equal to the radius of the top surface 14 of the second battery cell 12, that is, the cross-section of the heat exchange plate 20 on the plane perpendicular to the axis of the battery cell 10 is serpentine, so that the heat exchange plate 20 can achieve efficient integration of battery thermal management and thermal safety protection, while helping to reduce the cost of the heat exchange plate 20.

[0053] Optionally, the heat exchange plate 20 is bent back and forth to enclose the side 16 of the first battery cell 11 and the side 16 of the second battery cell 12, that is, the cross-section of the heat exchange plate 20 on the plane perpendicular to the axis of the battery cell 10 is in the shape of an "8", so that the heat exchange plate 20 completely wraps the side 16 of the first battery cell 11 and the side 16 of the second battery cell 12, which is beneficial to increase the heat exchange area between the heat exchange plate 20 and the first battery cell 11 and the second battery cell 12, and improve the heat exchange efficiency of the battery pack. At the same time, the heat exchange plate 20 completely separates the first battery cell 11 and the second battery cell 12, avoiding heat transfer in the battery pack and causing thermal runaway of the battery cells 10 one after another, which is beneficial to achieve efficient integration of battery thermal management and thermal safety protection.

[0054] In one implementation, see Figure 1 , Figure 2 and Figure 3 A plurality of first battery cells 11 and a plurality of second battery cells 12 alternately arranged in a first direction constitute a row of battery cells 10, and the battery pack includes at least two rows of battery cells 10, and the at least two rows of battery cells 10 are arranged sequentially in the second direction, and the second direction is perpendicular to the first direction. A heat exchange plate 20 is provided between the battery cells 10 of two adjacent rows of battery cells 10, so that when there are more battery cells 10 in the battery pack, the battery cells 10 can be arranged in the space, and the two adjacent battery cells 10 arranged in the space are separated by the heat exchange plate 20, so that the heat exchange plate 20 blocks the heat transfer between the adjacent battery cells 10, thereby avoiding the heat transfer in the battery pack and causing the battery cells 10 to successively thermally run away.

[0055] Optionally, in the second direction, the first cells 11 of two adjacent rows of cells 10 are arranged relative to each other, or the first cells 11 of one row of cells 10 are arranged relative to the spacing area between the first cells 11 and the second cells 12 of another row of cells 10. When the first cells 11 of two adjacent rows of cells 10 are arranged relative to each other in the second direction, the first cells 11 between the two adjacent rows of cells 10 are blocked by the first receiving groove 21, and the second cells between the two adjacent rows of cells 10 are blocked by the second receiving groove 22, so that the two adjacent cells 10 arranged in the space are separated by the heat exchange plate 20. When the first cells 11 of one row of cells 10 are arranged relative to the spacing area between the first cells 11 and the second cells 12 of another row of cells 10 in the second direction, so that the two adjacent cells 10 arranged in the space are separated by the heat exchange plate 20, it is beneficial to save the space occupied by the cells 10 and the heat exchange plate 20.

[0056] Optionally, in a single row of cells 10, there is a first gap 41 between the outer surface of the first cell 11 and the second receiving groove 22, and there is a second gap 42 between the second cell 12 and the outer surface of the first receiving groove 21, and the battery pack further includes a first elastic member 51 and a second elastic member 52, the first elastic member 51 is filled in the first gap 41, and the second elastic member 52 is filled in the second gap 42, so that the first elastic member 51 exerts a squeezing force on the outer surface of the first cell 11 and the second receiving groove 22, and the second elastic member 52 exerts a squeezing force on the outer surface of the second cell 12 and the first receiving groove 21, so that the heat exchange plate 20, the first cell 11 and the second cell 12 between the multiple rows of cells 10 can ensure a relatively stable position in the space, which is conducive to ensuring the structural stability of the battery pack. The first elastic member 51 and the second elastic member 52 can be foamed rubber.

[0057] The utility model also provides an electrical device, see Figure 1 , Figure 2 and Figure 3 , including an electrical device and a battery pack according to any one of the above-mentioned first aspect implementation modes, wherein the electrical device is electrically connected to the battery pack.

[0058] It can be understood that the electrical equipment in this embodiment has the battery pack in the above-mentioned embodiments. Therefore, the electrical equipment in this embodiment has all the technical effects of the battery pack in the above-mentioned embodiments. Since the technical effects of the battery pack have been fully explained in the above-mentioned embodiments, they will not be repeated here.

[0059] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0060] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A battery pack, characterized in that: include: A battery cell, wherein the battery cell comprises a first battery cell and a second battery cell that are adjacent to each other; A heat exchange plate, wherein the heat exchange plate is reciprocatingly bent to form a first accommodating groove and a second accommodating groove with grooves arranged opposite to each other, the first accommodating groove and the second accommodating groove are respectively located on two opposite surfaces of the heat exchange plate, the first battery cell is accommodated in the first accommodating groove, and the second battery cell is accommodated in the second accommodating groove.

2. The battery pack according to claim 1, characterized in that: The battery cell has a top surface and a bottom surface facing each other, the top surface is provided with a pole, and the battery cell also has a side surface, the side surface is connected to both the top surface and the bottom surface, the side surface of the first battery cell and the side surface of the second battery cell are arranged opposite to each other in a first direction, the side surface of the first battery cell is in contact with the inner wall of the first receiving groove, and the side surface of the second battery cell is in contact with the inner wall of the second receiving groove.

3. The battery pack according to claim 2, characterized in that: In a direction from the top surface of the first battery core to the bottom surface of the first battery core, a length of the heat exchange plate is greater than or equal to a length of a side surface of the first battery core.

4. The battery pack according to claim 3, characterized in that: The number of the first battery cells and the number of the second battery cells are both plural. In the first direction, the first battery cells and the second battery cells are alternately arranged, and the first accommodating grooves and the second accommodating grooves are alternately arranged.

5. The battery pack according to claim 4, characterized in that: The top surface of the battery cell is in the shape of a rectangle, the inner wall of the first receiving groove is in contact with three adjacent side surfaces of the first battery cell in sequence, and the maximum depth of the first receiving groove is greater than or equal to the length of the side of the top surface of the first battery cell perpendicular to the first direction.

6. The battery pack according to claim 5, characterized in that: The battery pack also includes a first adhesive and a second adhesive, the first battery cell has a first side surface, the first side surface is spaced apart from an inner wall of the first receiving groove, the first adhesive is connected to the first side surface, the second battery cell has a second side surface, the second side surface is spaced apart from an inner wall of the second receiving groove, and the second adhesive is connected to the second side surface.

7. The battery pack according to claim 4, characterized in that: The top surface of the battery cell is circular in shape, the inner wall of the first containing groove is in contact with the side surface of the first battery cell, and the maximum depth of the first containing groove is greater than or equal to the radius of the top surface of the first battery cell.

8. The battery pack according to claim 7, characterized in that: The multiple first battery cells and the multiple second battery cells alternately arranged in the first direction constitute a battery cell row, and the battery pack includes at least two battery cell rows, and the at least two battery cell rows are arranged in sequence in the second direction, the second direction is perpendicular to the first direction, and the heat exchange plate is provided between the battery cells of two adjacent battery cell rows.

9. The battery pack according to claim 8, characterized in that: In the second direction, the first battery cells of two adjacent battery cell rows are arranged opposite to each other, or the first battery cells of one battery cell row are arranged opposite to the interval area between the first battery cells and the second battery cells of another battery cell row.

10. The battery pack according to claim 8, characterized in that: In a single row of battery cells, a first gap is provided between the first battery cell and an outer surface of the second receiving groove, and a second gap is provided between the second battery cell and an outer surface of the first receiving groove. The battery pack further comprises a first elastic member and a second elastic member, wherein the first elastic member is filled in the first gap, and the second elastic member is filled in the second gap.

11. An electrical device, characterized in that: It comprises an electrical device and a battery pack as claimed in any one of claims 1 to 10, wherein the electrical device is electrically connected to the battery pack.

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