Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, the battery pack comprises at least two battery cell components and a heat exchange component, and each battery cell component comprises a plurality of battery cells; the heat exchange assembly comprises a first heat exchange part, a second heat exchange part and a second supporting piece, and the first heat exchange part, the second heat exchange part and the supporting piece are arranged between at least two adjacent battery cell assemblies; the first heat exchange component and the second heat exchange component are respectively arranged close to one of the battery cell components between two adjacent battery cell components, and the second supporting piece is supported between the first heat exchange component and the second heat exchange component. The battery pack provided by the embodiment of the utility model has the advantages that the heat exchange assembly is stable and reliable and is not easy to damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery pack and electric equipment. BACKGROUND

[0002] The battery pack mainly includes a box body and battery cells packaged in the box body.

[0003] In the related art, in order to improve the electric energy storage capacity of the battery pack, multiple layers of battery cells are arranged in the box body, and each layer of battery cells is provided with a liquid cooling plate for heat dissipation. However, when the battery pack vibrates, the liquid cooling plate is easily damaged by impact. SUMMARY

[0004] Embodiments of the utility model provide a battery pack and electric equipment, which can improve the technical problem that the heat exchange component of the battery pack is easily damaged.

[0005] In a first aspect, embodiments of the utility model provide a battery pack, comprising:

[0006] at least two battery cell assemblies, each battery cell assembly comprising a plurality of battery cells; and

[0007] a heat exchange assembly comprising a first heat exchange component, a second heat exchange component and a second support member, the first heat exchange component, the second heat exchange component and the second support member being arranged between at least two adjacent battery cell assemblies.

[0008] Among the two adjacent battery cell assemblies, the first heat exchange component and the second heat exchange component are arranged close to one of the battery cell assemblies respectively, and the second support member is supported between the first heat exchange component and the second heat exchange component.

[0009] In some embodiments, among the two adjacent battery cell assemblies, the second heat exchange component is located on the upper side of the first heat exchange component in the vertical direction, and the structural strength of the second heat exchange component is greater than that of the first heat exchange component.

[0010] In some embodiments, the first heat exchange component comprises a stamping forming plate, and the stamping forming plate forms a flow channel for the cooling medium to flow.

[0011] The second heat exchange component comprises an extrusion forming plate, and the extrusion forming plate forms a flow channel for the cooling medium to flow.

[0012] In some embodiments, the first heat exchange component is provided with a flow channel for the cooling medium to flow, and the second support member abuts the non-flow channel region of the adjacent first heat exchange component.

[0013] In some embodiments, the second support member comprises a buffer layer, and the buffer layer is in contact with the second heat exchange component.

[0014] In some embodiments, the second support member extends along the length direction of the battery cell assembly, and the ratio of the length of the second support member to the length of the battery cell assembly is greater than or equal to 3 / 5.

[0015] In some embodiments, all the battery cell assemblies are arranged along a first direction; each of the battery cell assemblies comprises a plurality of columns of battery cells, the plurality of columns of battery cells of the same battery cell assembly are arranged along a second direction, and the battery cells in the same column are arranged along a third direction; the first direction, the second direction, and the third direction are intersected with each other.

[0016] In some embodiments, the number of the second support members is at least two, and the at least two second support members are arranged along the second direction with a spacing therebetween, and each of the second support members extends along the third direction.

[0017] In some embodiments, there is a first gap between two adjacent columns of battery cells in the same battery cell assembly, and at least one of the second support members is arranged in correspondence with at least one of the first gaps along the first direction.

[0018] In some embodiments, all the battery cell assemblies are arranged along a first direction; along the first direction, the height of the second support member protruding from the connected first heat exchange component is greater than or equal to 2 mm; and / or,

[0019] All the battery cell assemblies are arranged along a first direction; along the first direction, the gap between two adjacent battery cell assemblies is D1, and the height of the second support member is D2, and the ratio of D1 to D2 is 13:4 to 13:5; and / or,

[0020] All the battery cell assemblies are arranged along a first direction; along the first direction, the gap between two adjacent battery cell assemblies is D1, and the sum of the height of the two adjacent battery cell assemblies and the gap therebetween is D3, and the ratio of D1 to D3 is 3:20 to 1:15.

[0021] In some embodiments, the heat exchange assembly comprises a first support member, and the first support member is sandwiched between the first heat exchange component and the adjacent battery cell.

[0022] In some embodiments, each of the battery cell assemblies comprises at least two columns of battery cells, and the first support member overlaps with the two adjacent columns of battery cells.

[0023] In some embodiments, each side of the first support member in the width direction overlaps with a column of battery cells.

[0024] The first support member and each column of the battery cells overlap along a width direction of the first support member, and a width of the overlapping part is greater than or equal to 3 mm.

[0025] In some embodiments, the first support member and / or the second support member is a strip-shaped support member.

[0026] In some embodiments, the battery cell assembly further comprises a busbar, and the battery cell is electrically connected to the busbar.

[0027] The first heat exchange component is connected to the pole or the busbar of the adjacent battery cell assembly through a heat-conducting adhesive.

[0028] In some embodiments, the battery pack comprises a plurality of sub-boxes, all of which are stacked along a first direction, and each of the sub-boxes is provided with one battery cell assembly.

[0029] In a second aspect, the embodiments of the utility model provide a power utilization device, which comprises the battery pack according to any one of the above.

[0030] The embodiments of the utility model have the advantages of:

[0031] In the embodiments of the utility model, the first heat exchange component and the second heat exchange component can exchange heat with the adjacent battery cell assemblies respectively. On this basis, the first heat exchange component and / or the second heat exchange component can be supported by the second support member, so that the technical problem that the heat exchange components are easily damaged by impact can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative effort.

[0033] Figure 1 The structural schematic diagram of the battery pack provided by the embodiments of the utility model.

[0034] Figure 2 The structural schematic diagram of the battery pack provided by the embodiments of the utility model. Figure 1 The sectional view of the battery pack shown in the figure along the A-A direction.

[0035] Figure 3 The sectional view of the battery pack shown in the figure along the A-A direction. Figure 2 The enlarged view of the X part in the figure.

[0036] Figure 4 The sectional view of the battery pack shown in the figure along the A-A direction. Figure 2An exploded view of the cell assembly and the heat exchange assembly of the battery pack shown.

[0037] Figure 5 For Figure 1 A perspective view of the battery pack shown.

[0038] Figure 6 For Figure 5 An exploded view of the battery pack shown.

[0039] Figure 7 For Figure 5 A local enlarged view at Y in the battery pack shown.

[0040] The various reference numbers in the figure are respectively:

[0041] 100, cell assembly;

[0042] 11, cell; 12, busbar; 13, first gap;

[0043] 200, heat exchange assembly;

[0044] 21, first heat exchange component; 221, buffer layer; 222, first support; 223, second support; 224, third support; 23, second heat exchange component;

[0045] 300, box body;

[0046] 31, sub-box body; 311, fixing lug; 312, second positioning column; 313, second positioning hole;

[0047] 400, box cover assembly;

[0048] 500, bottom cover;

[0049] 600, connecting plate;

[0050] H1, first direction; H2, second direction; H3, third direction. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower positions of the device in the actual use or working state, and specifically refer to the drawing direction in the drawings. The "inner" and "outer" refer to the outline of the device.

[0052] The battery pack can be applied to an electric device. The electric device can be, but is not limited to, a vehicle, a smart wearable device, a mobile terminal, a household appliance, and a medical instrument, and the embodiments of the present application do not limit the electric device. The vehicle includes, but is not limited to, a car, a bus, a train, a ship, a flying device, and the like. The smart wearable device includes, but is not limited to, a smart watch, a smart bracelet, a cervical vertebra massage instrument, and the like. The mobile terminal includes, but is not limited to, a smart phone, a notebook computer, a tablet computer, and a POS (point of sales terminal) machine. The household appliance includes, but is not limited to, a television, a washing machine, an air conditioner, an electric rice cooker, a smart sweeper, and a smart lamp. The medical instrument includes, but is not limited to, an infrared electronic thermometer, a pulse oximeter, and a human body composition analyzer. Of course, the battery pack can also be applied to an energy storage device, and the embodiments of the present application do not limit the battery pack.

[0053] Please refer to Figure 1 , Figure 2 and Figure 3 The battery pack includes at least two cell assemblies 100 and a heat exchange assembly 200. Each cell assembly 100 includes a plurality of cells 11. The heat exchange assembly 200 includes a first heat exchange component 21, a second heat exchange component 23, and a second support 223. The first heat exchange component 21, the second heat exchange component 23, and the second support 223 are arranged between at least two adjacent cell assemblies 100.

[0054] Among the two adjacent cell assemblies 100, the first heat exchange component 21 and the second heat exchange component 23 are arranged close to one of the cell assemblies 100, and the second support 223 is arranged between the first heat exchange component 21 and the second heat exchange component 23.

[0055] Thus, the adjacent battery cell assemblies can be heat-exchanged by the first heat exchange component 21 and the second heat exchange component 23, respectively. On this basis, the first heat exchange component 21 and / or the second heat exchange component 23 can be supported by the second support 223, thereby improving the technical problem that the first heat exchange component 21 and / or the second heat exchange component 23 are easily damaged by impact.

[0056] It should be noted that, in the embodiments of the present application, the association relationship of the associated objects described by "and / or" can represent three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0057] In some embodiments, between the two adjacent battery cell assemblies 100, the second heat exchange component 23 is located on the upper side of the first heat exchange component 21 in the vertical direction, and the structural strength of the second heat exchange component 23 is greater than that of the first heat exchange component 21.

[0058] For example, the plurality of battery cell assemblies 100 are stacked in the vertical direction. Then, when the battery pack is impacted, the upper battery cell assembly 100 has a large weight, and thus can directly cause a large impact on the second heat exchange component 23 located on the lower side. Therefore, the structural strength of the second heat exchange component 23 is greater than that of the first heat exchange component 21, which can effectively avoid the damage of the second heat exchange component 23 caused by the direct impact of the upper battery cell assembly 100.

[0059] For example, the first heat exchange component 21 includes a stamping forming plate, and the stamping forming plate forms a flow channel for the cooling medium to flow. The second heat exchange component 23 includes an extrusion forming plate, and the extrusion forming plate forms a flow channel for the cooling medium to flow.

[0060] Therefore, the first heat exchange component 21 formed by the stamping forming plate is relatively thin compared with the extrusion forming second heat exchange component 23, so that the structural strength of the second heat exchange component 23 is greater than that of the first heat exchange component 21.

[0061] When the first heat exchange component 21 includes a stamping forming plate, two stamping forming plates can be stacked and connected to form a flow channel for the cooling medium to flow between the two stamping forming plates.

[0062] In some embodiments, the first heat exchange component 21 is provided with a flow channel for the cooling medium to flow, and the second support 223 abuts the non-flow channel region of the adjacent first heat exchange component 21, so that the impact force received by the second heat exchange component 23 can be directly transmitted to the flow channel region of the lower first heat exchange component 21 through the second support 223, thereby preventing the leakage of the cooling medium caused by the damage of the flow channel region of the first heat exchange component 21 from causing short circuit inside the battery pack.

[0063] Of course, in some other embodiments, the first heat exchange component 21 can further comprise a first heating film for heating the battery cell assembly 100, which is not limited in the embodiments of the present application.

[0064] In some other embodiments, the second heat exchange component 23 can further comprise a second heating film for heating the battery cell assembly 100, which is not limited in the embodiments of the present application.

[0065] In some embodiments, the second support 223 can be made of insulating material to avoid causing short circuit inside the battery pack. For example, the second support 223 can be made of plastic. Of course, the second support 223 can also be made of metal material, and the surface of the second support 223 is provided with an insulating layer to avoid causing short circuit inside the battery pack, which is not limited in the embodiments of the present application.

[0066] In some embodiments, the second support 223 can comprise a hard support, so as to ensure sufficient support strength of the second support 223. For example, the second support 223 can be made of epoxy resin, glass fiber, epoxy resin and glass fiber composite material, etc., which is not limited in the embodiments of the present application.

[0067] Of course, the second support 223 can further comprise a buffer layer 221. For example, at least one side surface of the second support 223 is provided with the buffer layer 221.

[0068] For example, the buffer layer 221 can abut against the second heat exchange component 23. Further, when the battery pack vibrates, the second heat exchange component 23 can be avoided from the first heat exchange component 21 through the buffer layer 221.

[0069] The buffer layer 221 can be a silica gel foam piece, or any other elastic piece, which is not limited in the embodiments of the present application.

[0070] In some embodiments, the second support 223 can be a hollow structure, so that the second support 223 has the advantage of lower weight to reduce the overall strength of the battery pack.

[0071] Of course, in some other embodiments, the second support 223 can also be a solid structure to make the strength of the second support 223 better. In addition, part of the second support 223 can be a hollow structure, and part of the second support 223 can be a solid structure, which is not limited in the embodiments of the present application.

[0072] In some embodiments, the second support 223 is arranged along the length direction of the battery cell assembly 100. The ratio of the length of the second support 223 to the length of the battery cell assembly 100 is greater than or equal to three-fifths. Thus, along the length direction of the battery cell assembly 100, the second support 223 can provide better support to more positions of the second heat exchange component 23 and the first heat exchange component 21, so that the support force provided by the second support 223 is more dispersed and uniform.

[0073] For example, the ratio of the length of the second support 223 to the length of the battery cell assembly 100 is greater than or equal to three-fifths, four-fifths, five-fifths, six-fifths, seven-fifths, or eight-fifths, or even the length of the second support 223 can be equal to the length of the battery cell assembly 100, which is not limited in the embodiments of the present application.

[0074] It can be understood that the number of the second support 223 can be one or multiple, which is not limited in the embodiments of the present application. When the number of the second support 223 is at least two, the support effect can be improved by the multiple second supports 223, thereby improving the stability and reliability of the battery pack.

[0075] In some embodiments, the second support 223 can be long strip-shaped, so as to not only play a supporting effect on the second heat exchange component 23 and the first heat exchange component 21, but also avoid that the second support 223 in the form of a plate causes the battery pack to be too heavy.

[0076] The second support 223 can be arranged close to the middle part of the corresponding first heat exchange component 21, or arranged close to the side of the corresponding first heat exchange component 21, or multiple second supports 223 can be arranged along the length or width direction of the corresponding first heat exchange component 21, which is not limited in the embodiments of the present application.

[0077] Please continue to refer to Figure 4 , for example, all the battery cell assemblies 100 are arranged along the first direction H1. Each battery cell assembly 100 includes multiple columns of battery cells 11, and the multiple columns of battery cells 11 of the same battery cell assembly 100 are arranged along the second direction H2. The multiple battery cells 11 in the same column are arranged along the third direction H3, and the first direction H1, the second direction H2, and the third direction H3 intersect with each other.

[0078] Correspondingly, the number of the second support 223 is at least two, and the at least two second supports 223 are arranged at intervals along the second direction H2, and each second support 223 is arranged along the third direction H3.

[0079] It should be noted that the first direction H1 can be the vertical direction (or the height direction of the battery pack), the second direction H2 can be the front-to-back direction (or the width direction of the battery pack), and the third direction H3 can be the left-to-right direction (or the length direction of the battery pack). Of course, the specific directions of the first direction H1, the second direction H2, and the third direction H3 can be interchanged, and this application embodiment does not limit this.

[0080] Thus, on the one hand, in the width direction of the battery pack, multiple second support members 223 can provide support for different positions of the second heat exchange component 23, so that the second heat exchange component 23 is subjected to more uniform force in the width direction of the battery pack. On the other hand, in the length direction of the battery pack, each second support member 223 can provide support for the second heat exchange component 23 at various points in the length direction, so that the second heat exchange component 23 is subjected to more uniform force in the length direction of the battery pack.

[0081] In some embodiments, a first gap 13 is provided between two adjacent rows of cells 11 in the same cell assembly 100, and at least one second support member 223 is provided corresponding to at least one first gap 13 along a first direction H1.

[0082] Therefore, it can also be understood that the second support member 223 is located below or above the first gap 13. It can also be understood that when the battery pack vibrates, relative displacement easily occurs between adjacent rows of cells 11, causing the stress inside the second heat exchange component 23 to be mainly concentrated in the area below or above the first gap 13. Therefore, by placing the second support member 223 below or above the first gap 13, support can be provided to the area corresponding to the second heat exchange component 23 and the first gap 13, thereby reducing the probability of damage to this area.

[0083] It is also understood that each first gap 13 may have a second support 223 on at least one side along the first direction H1, thereby improving the stability and reliability of the battery pack.

[0084] In some embodiments, the first gap 13 of each cell assembly 100 coincides with the orthographic projection of the first gap 13 along the first direction H1. That is, the cells of each cell assembly 100 are arranged in the same way.

[0085] Please refer to Figure 3 In some embodiments, all cell assemblies 100 are arranged along a first direction H1. Along the first direction H1, the gap between two adjacent cell assemblies 100 is D1, the height of the second support 223 is D2, and the ratio of D1 to D2 is 13:4 to 13:5.

[0086] Thus, it can be avoided that the height of the second support 223 is too small to cause the structural strength to be too low, or the height of the second support 223 is too small to cause the first heat exchange component 21 and the second heat exchange component 23 to be spaced apart by a gap that is not large enough. In addition, it can be avoided that the height of the second support 223 is too large to waste more space in the battery pack, so that the energy density of the battery pack can be improved.

[0087] For example, the ratio of D1 to D2 is 13:4, 13:4.1, 13:4.4, 13:4.5, 13:4.55, 13:4.6, 13:4.8, 13:4.9 or 13:5, which is not limited in the embodiments of the present application.

[0088] In some embodiments, all the battery cell assemblies 100 are arranged along the first direction H1. Along the first direction H1, the height of the second support 223 protruding from the corresponding first heat exchange component 21 is greater than or equal to 2 mm.

[0089] Thus, it can be avoided that the height of the second support 223 is too small to cause the structural strength to be too low, or the height of the second support 223 is too small to cause the first heat exchange component 21 and the second heat exchange component 23 to be spaced apart by a gap that is not large enough. In addition, it can be avoided that the height of the second support 223 is too large to waste more space in the battery pack, so that the energy density of the battery pack can be improved.

[0090] For example, along the first direction H1, the height of the second support 223 protruding from the corresponding first heat exchange component 21 is 2 mm, 2.4 mm, 3 mm, 3.5 mm or 4 mm, which is not limited in the embodiments of the present application.

[0091] For example, along the first direction H1, the height of the second support 223 protruding from the corresponding first heat exchange component 21 is 2 mm, 2.4 mm, 3 mm, 3.5 mm or 4 mm, which is not limited in the embodiments of the present application. Figure 2 In some embodiments, all the battery cell assemblies 100 are arranged along the first direction H1. Along the first direction H1, the gap between the adjacent two battery cell assemblies 100 is D1, the sum of the height of the adjacent two battery cell assemblies 100 and the gap between the adjacent two battery cell assemblies 100 is D3, and the ratio of D1 to D3 is 3:20 to 1:15.

[0092] Thus, it can be avoided that the gap between the adjacent two battery cell assemblies 100 is too small to easily impact and damage the first heat exchange component 21 and / or the second heat exchange component 23, and it can be avoided that the gap between the adjacent two battery cell assemblies 100 is too large to cause the energy density of the battery pack to decrease.

[0093] For example, the ratio of D1 to D3 is 3:20, 2:20, 2:15 or 1:15, which is not limited in the embodiments of the present application.

[0094] In some embodiments, the heat exchange assembly 200 further comprises a first support 222, which is clamped between the first heat exchange component 21 and the adjacent battery cell 11. Thus, the adjacent battery cell 11 and / or the first heat exchange component 21 is supported by the first support 222.

[0095] For example, continuing to take the example that the battery cell assemblies 100 are stacked in the vertical direction, the impact force received by the upper battery cell assembly 100 can be sequentially transmitted to the lower battery cell assembly 100 through the second heat exchange component 23, the second support 223, the first heat exchange component, and the first support 222.

[0096] Please continue to refer to Figure 4 In some embodiments, the battery cell assembly 100 further comprises a busbar 12. The battery cell 11 is electrically connected to the busbar 12. The first heat exchange component 21 can be connected to the pole of the adjacent battery cell assembly 100 or the busbar 12 through a heat-conducting adhesive.

[0097] Then, the first heat exchange component 21 can be supported by the first support 222 to avoid crushing the pole, the busbar 12, and other structures of the adjacent battery cell assembly 100.

[0098] In some embodiments, the first support 222 can be a hollow structure. Thus, when the battery vibrates, the first support 222 can adaptively deform to allow a certain relative movement between the adjacent battery cell 11 and the first heat exchange component 21, thereby providing support for the adjacent first heat exchange component 21 and avoiding damage to the first heat exchange component 21 caused by being squeezed by the first support 222.

[0099] In some embodiments, the first support 222 can be lapped on the adjacent battery cell 11.

[0100] For example, the first support 222 can be located on the upper side of the lapped battery cells 11, so that the first support 222 is supported by the battery cells 11 to provide support for the adjacent first heat exchange component 21 from bottom to top.

[0101] It can be understood that the first support 222 can be lapped on the adjacent battery cell 11 by bonding, and the first support 222 can be lapped on the adjacent battery cell 11 by any other means such as clamping, welding, and fusing, which are not limited in the embodiments of the application.

[0102] That is, the first support 222 and the battery cell 11 can be fixedly connected. Thus, the first support 222 can be prevented from being displaced during use, thereby improving the reliability and stability of the battery pack.

[0103] It has been mentioned above that, in some embodiments, each battery cell assembly 100 includes at least two rows of battery cells 11. Then, the first support 222 can overlap with the two adjacent rows of battery cells 11.

[0104] It can be understood that, when the battery pack vibrates, the two adjacent rows of battery cells 11 are prone to relative displacement. Therefore, by overlapping the first support 222 with the two adjacent rows of battery cells 11, the amplitude of the relative displacement between the two adjacent rows of battery cells 11 is reduced, and thus the impact force exerted by the two adjacent rows of battery cells 11 on the first heat exchange component 21 above is more uniform and dispersed, so that the stress in the first heat exchange component 21 is more uniform and dispersed, and finally the probability of damage to the first heat exchange component 21 is reduced.

[0105] It can also be understood that, as mentioned above, the arrangement of the battery cells of each battery cell assembly 100 can be the same, and then the internal stress of the first heat exchange component 21 caused by the impact of the two upper rows of battery cells 11 is concentrated in the area of the first heat exchange component 21 located below the joint of the two adjacent rows of battery cells 11, and the first support 222 overlapping at the two lower rows of battery cells 11 can provide effective support to this area, thereby reducing the probability of damage to the first heat exchange component 21.

[0106] In some embodiments, the first support 222 overlaps with a row of battery cells 11 at each end in the width direction of the first support 222. In the width direction of the first support 222, the width of the portion of the first support 222 overlapping with each row of battery cells 11 is greater than or equal to 3 mm.

[0107] Furthermore, the first support 222 can have a large enough overlapping area with each row of battery cells 11. Thus, on the one hand, the stability of the connection between the first support 222 and each row of battery cells 11 can be ensured; on the other hand, even if there is a certain error in the assembly process, the first support 222 can still be overlapped with the battery cells 11.

[0108] For example, in the width direction of the first support 222, the width of the portion of the first support 222 overlapping with each row of battery cells 11 is 3 mm, 3.7 mm, 4 mm, 4.33 mm, 4.5 mm, 4.8 mm, 5 mm or 6 mm, which is not limited in the embodiments of the present application.

[0109] In some embodiments, the width of the first support 222 can be greater than or equal to 12 mm. Thus, by using a first support 222 wide enough, the width of the portion of the first support 222 overlapping with each row of battery cells 11 can be ensured, and thus the stability and reliability of the overlap of the first support 222 can be ensured.

[0110] For example, the width of the first support 222 can be 12 mm, 12.7 mm, 13 mm, 13.5 mm, 14 mm, 15.5 mm, 16 mm, 17.55 mm, or 18 mm, which is not limited in the embodiments of the present application.

[0111] In some embodiments, the first support 222 can be in a strip shape. Therefore, the first support 222 can not only play a supporting effect on the first heat exchange component 21, but also avoid that the board-shaped support 22 completely separates the battery cell assembly 100 from the first heat exchange component 21, thereby reducing the heat exchange effect of the first heat exchange component 21.

[0112] In some embodiments, the first support 222 can be made of insulating material to avoid causing internal short circuit of the battery pack. For example, the first support 222 can be made of plastic. Of course, the first support 222 can also be made of metal material, and the surface of the first support 222 is provided with an insulating layer to avoid causing internal short circuit of the battery pack, which is not limited in the embodiments of the present application.

[0113] In some embodiments, between the adjacent two battery cell assemblies 100, the first support 222 and the second support 223 can be one-to-one correspondingly arranged.

[0114] Please continue to refer to Figure 5 The battery pack can further include a box body 300, and the battery cell assembly 100 and the heat exchange assembly 200 are at least partially arranged in the box body 300.

[0115] Please continue to refer to Figure 6 In some embodiments, the box body 300 includes a plurality of sub-box bodies 31, and the plurality of sub-box bodies 31 are stacked along the first direction H1, and each sub-box body 31 is provided with one battery cell assembly 100.

[0116] Therefore, by stacking the plurality of sub-box bodies 31, the number of battery cell assemblies 100 in the battery pack can be increased to improve the electrical energy storage capacity of the battery pack. Moreover, by arranging part of the battery cell assemblies 100 in the plurality of sub-box bodies 31 respectively, each sub-box body 31 and the corresponding battery cell assembly 100 can form a small unit or module during assembly, thereby reducing the installation difficulty of each small unit or module, and finally the plurality of small units or modules can be assembled to reduce the assembly difficulty of the plurality of battery cell assemblies 100.

[0117] In some embodiments, along the first direction H1, one sub-box body 31 at the outermost end is provided with a box cover assembly 400, and another sub-box body 31 is provided with a bottom cover 500.

[0118] Please continue to refer to Figure 7In some embodiments, the battery pack further comprises at least one connecting plate 600, the outer wall of two adjacent sub-boxes 31 is connected with the connecting plate 600, so that the stability and reliability of the connection between the two adjacent sub-boxes 31 can be improved through the connecting plate 600.

[0119] The connecting plate 600 and the sub-box 31 can be fixed by screwing, riveting or welding, and the application embodiments are not limited in this regard.

[0120] In some embodiments, the outer wall of the sub-box 31 is provided with a fixing lug 311, and the fixing lugs 311 of two adjacent sub-boxes 31 are connected and fixed, so that the stability and reliability of the connection between the two adjacent sub-boxes 31 can be improved through the fixing lugs 311.

[0121] The fixing lugs 311 can be fixed by screwing, riveting or welding, and the application embodiments are not limited in this regard.

[0122] In some embodiments, of two adjacent fixing lugs 311, one fixing lug 311 is provided with a second positioning column 312, and the other fixing lug 311 is provided with a second positioning hole 313, and the second positioning column 312 is arranged in the second positioning hole 313 to improve the position accuracy of the installation of the two adjacent sub-boxes 31.

[0123] In some embodiments, the outer wall of the sub-box 31 is connected with the connecting plate 600 along at least one side in the second direction H2, and the outer wall of the sub-box 31 is provided with the fixing lug 311 along at least one side in the third direction H3. The first direction H1, the second direction H2 and the third direction H3 are perpendicular to each other.

[0124] For example, the first direction H1 can be the height direction of the battery pack, the second direction H2 can be the width direction of the battery pack, and the third direction H3 can be the length direction of the battery pack, so that stable and reliable connection and fixation of each side surface of the two adjacent sub-boxes 31 can be achieved. Of course, the specific directions of the first direction H1, the second direction H2 and the third direction H3 can be interchangeable, and the application embodiments are not limited in this regard.

[0125] The application embodiments also provide a power consumption device, which can comprise the battery pack described above.

[0126] The electric device can be, but is not limited to, a vehicle, a smart wearable device, a mobile terminal, a household appliance, and a medical instrument, and the embodiments of the present application do not limit the same. The vehicle includes, but is not limited to, a car, a bus, a train, a ship, a flying device, and the like. The smart wearable device includes, but is not limited to, a smart watch, a smart bracelet, a cervical vertebra massage instrument, and the like. The mobile terminal includes, but is not limited to, a smart phone, a notebook computer, a tablet computer, a POS (point of sales terminal) machine. The household appliance includes, but is not limited to, a television, a washing machine, an air conditioner, an electric rice cooker, a smart sweeper, a smart lamp, and the like. The medical instrument includes, but is not limited to, an infrared electronic thermometer, a pulse oximeter, a human body composition analyzer, and the like.

[0127] The above has introduced the embodiments of the present application in detail, and the principle and implementation mode of the present application have been described by applying specific examples in this paper, and the above embodiment description is only for helping to understand the method of the present application and its core idea; meanwhile, for the person skilled in the art, according to the idea of the present application, the specific implementation mode and application range will have changes, and according to the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A battery pack, characterized by, The application relates to a battery pack, comprising: at least two battery cell assemblies, each of which comprises a plurality of battery cells; and a heat exchange assembly, which comprises a first heat exchange component, a second heat exchange component and a second support, and the first heat exchange component, the second heat exchange component and the second support are arranged between at least two adjacent battery cell assemblies. Among the two adjacent battery cell assemblies, the first heat exchange component and the second heat exchange component are arranged close to one of the battery cell assemblies respectively, and the second support is arranged between the first heat exchange component and the second heat exchange component.

2. The battery pack of claim 1, wherein, Among the two adjacent battery cell assemblies, the second heat exchange component is arranged on the upper side of the first heat exchange component in the vertical direction, and the structural strength of the second heat exchange component is greater than that of the first heat exchange component.

3. The battery pack of claim 2, wherein, The first heat exchange component comprises a stamping forming plate, and the stamping forming plate forms a flow channel for the cooling medium. The second heat exchange component comprises an extrusion forming plate, and the extrusion forming plate forms a flow channel for the cooling medium.

4. The battery pack of claim 1, wherein, The first heat exchange component is provided with a flow channel for the cooling medium, and the second support abuts the non-flow channel area of the adjacent first heat exchange component.

5. The battery pack of claim 1, wherein, The second support comprises a buffer layer, and the buffer layer abuts the second heat exchange component.

6. The battery pack of claim 1, wherein, The second support is arranged in the length direction of the battery cell assembly, and the ratio of the length of the second support to the length of the battery cell assembly is greater than or equal to 3 / 5.

7. The battery pack of any one of claims 1 to 6, wherein, All the battery cell assemblies are arranged in a first direction; each of the battery cell assemblies comprises a plurality of columns of battery cells, the columns of battery cells in the same battery cell assembly are arranged in a second direction, the battery cells in the same column are arranged in a third direction, and the first direction, the second direction and the third direction intersect with each other. The number of the second supports is at least two, and the at least two second supports are arranged in the second direction and extend in the third direction.

8. The battery pack of claim 7, wherein, Between two adjacent columns of battery cells in the same battery cell assembly, at least one first gap is arranged, and at least one second support is arranged in the first direction corresponding to at least one first gap.

9. The battery pack of any one of claims 1 to 6, wherein, All the battery cell assemblies are arranged in a first direction; along the first direction, the height of the second support protruding from the connected first heat exchange component is greater than or equal to 2 mm; and / or, All the battery cell assemblies are arranged in a first direction; along the first direction, the gap between two adjacent battery cell assemblies is D1, the height of the second support is D2, and the ratio of D1 to D2 is 13:4 to 13:5; and / or, All the battery cell assemblies are arranged in a first direction; along the first direction, the gap between two adjacent battery cell assemblies is D1, the sum of the height of the adjacent two battery cell assemblies and the gap between the adjacent two battery cell assemblies is D3, and the ratio of D1 to D3 is 3:20 to 1:

15.

10. The battery pack of any one of claims 1-6, wherein, The heat exchange assembly comprises a first support, and the first support is arranged between the first heat exchange component and the adjacent battery cell.

11. The battery pack of claim 10, wherein, Each of the cell assemblies comprises at least two rows of the cells, and the first support member overlaps with two adjacent rows of the cells.

12. The battery pack of claim 11, wherein, Each side of the first support member in the width direction overlaps with one row of the cells. In the width direction of the first support member, the width of the portion where the first support member overlaps with each row of the cells is greater than or equal to 3 mm.

13. The battery pack of claim 11, wherein, The first support member and / or the second support member is a strip-shaped support member.

14. The battery pack of any one of claims 1-6, wherein, The cell assembly further comprises a busbar, and the cells are electrically connected with the busbar. The first heat exchange component is connected with the pole or the busbar of the adjacent cell assembly through heat-conducting glue.

15. The battery pack of any one of claims 1-6, wherein, The battery pack comprises a plurality of sub-boxes, all of which are stacked in a first direction, and each of the sub-boxes is provided with one cell assembly.

16. An electrical device, characterized by The battery pack comprises the cell assembly according to any one of claims 1 to 15.

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