Battery pack and electric equipment

Abstract

The invention provides a battery pack and electric equipment, the battery pack comprises a battery cell assembly and a heat exchange assembly, the battery cell assembly comprises a plurality of battery cells, the surface of one side where an output electrode of each battery cell is located comprises a functional area and a non-functional area, and the functional area is provided with at least one of the output electrode, a liquid injection hole and an anti-explosion valve; the heat exchange assembly comprises a first heat exchange part and a first supporting piece, the first heat exchange part is arranged on the side where the output electrode of the battery cell is located, one side of the first supporting piece abuts against the adjacent first heat exchange part, and the other side of the supporting piece abuts against the non-functional area of the adjacent battery cell. According to the battery pack provided by the embodiment of the invention, the technical problem that the first heat exchange component is easy to crush the battery cells can be improved by arranging the supporting piece.

Description

Technical Field

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

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

[0003] In the related art, a liquid cooling plate is also provided in the box, and the liquid cooling plate is attached to the upper side of the battery cell to dissipate heat from the battery cell. However, when the battery pack vibrates, the liquid cooling plate is likely to impact the battery cell, causing the output pole and other functional structures on the surface of the battery cell to be crushed by the liquid cooling plate. Summary of the invention

[0004] The embodiments of the present invention provide a battery pack and an electric device, which can improve the technical problem that the structure of the functional area of ​​the battery cell of the battery pack is easily crushed by the first heat exchange component.

[0005] In a first aspect, an embodiment of the present invention provides a battery pack, comprising:

[0006] A cell assembly, the cell assembly comprising a plurality of cells, a surface of one side of the cell where the output pole is located comprising a functional area and a non-functional area, the functional area being provided with at least one of the output pole, the injection hole and the explosion-proof valve; and,

[0007] A heat exchange component, the heat exchange component comprising a first heat exchange component and a first support member, the first heat exchange component is arranged on the side where the output pole of the battery cell is located, one side of the first support member abuts against the adjacent first heat exchange component, and the other side of the first support member abuts against the non-functional area of ​​the adjacent battery cell.

[0008] In some embodiments, the battery cell assembly includes at least two columns of battery cells, and the first support member overlaps the two adjacent columns of battery cells.

[0009] In some embodiments, each side of the first support member in the width direction overlaps with a row of the battery cells;

[0010] Along the width direction of the first support member, the width of the portion where the first support member overlaps with each column of the battery cells is greater than or equal to 3 mm.

[0011] In some embodiments, the number of the battery cell assemblies is at least two, and all the battery cell assemblies are arranged in a vertical direction;

[0012] The heat exchange assembly further includes a second support member, which is located between the first heat exchange component and the battery core assembly at the top.

[0013] In some embodiments, the heat exchange assembly further includes at least two second heat exchange components, and each of the battery core assemblies is provided with the second heat exchange component on a side away from the first heat exchange component for heat exchange;

[0014] The second support member is sandwiched between the adjacent first heat exchange components and the second heat exchange components.

[0015] In some embodiments, the structural strength of the second heat exchange component is greater than the structural strength of the first heat exchange component.

[0016] In some embodiments, the first heat exchange component includes a stamped plate, and the stamped plate forms a flow channel for the cooling medium to flow;

[0017] The second heat exchange component includes an extruded plate, and a flow channel for cooling medium to flow is formed in the extruded plate.

[0018] In some embodiments, a thickness of the second heat exchange component is greater than a thickness of the first heat exchange component.

[0019] In some embodiments, the first support member and / or the second support member abuts against an adjacent non-flow channel region of the first heat exchange component.

[0020] In some embodiments, the second supporting member includes a first buffer layer, and the first buffer layer abuts against the second heat exchange component.

[0021] In some embodiments, along the vertical direction, the height of the second support member protruding from the connected first heat exchange component is greater than or equal to 2 mm;

[0022] Along the vertical direction, the gap between two adjacent battery core assemblies is D1, the height of the second support member is D2, and the ratio of D1 to D2 is 13:4 to 13:5; and / or,

[0023] Along the vertical direction, the gap between two adjacent battery cell assemblies is D1, the sum of the height of two adjacent battery cell assemblies and the gap between two adjacent battery cell assemblies is D3, and the ratio of D1 to D3 is 3:20 to 1:15; and / or,

[0024] Along the vertical direction, the gap between two adjacent battery core assemblies is D1, the height of the first support member is D4, and the ratio of D1 to D4 is 13:6 to 13:7.

[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 heat exchange component further includes a third support member, and the third support member is passed through the first heat exchange component to be sandwiched between two adjacent battery core assemblies.

[0027] In some embodiments, the number of the battery cell assemblies is at least two, and all the battery cell assemblies are arranged along a first direction; each of the battery cell assemblies includes multiple columns of the battery cells, and multiple columns of the battery cells in the same battery cell assembly are arranged along a second direction, and multiple battery cells in the same column are arranged along a third direction, and the first direction, the second direction, and the third direction intersect each other;

[0028] There are multiple first support members, at least two of which are spaced apart along the second direction, and each of the first support members is extended along the third direction.

[0029] In some embodiments, a first gap is provided between two adjacent columns of the battery cells in the same battery cell assembly, and at least one of the first supporting members and at least one of the first gaps are provided correspondingly along the first direction.

[0030] In some embodiments, the first support member is extended along the length direction of the battery cell assembly, and the ratio of the length of the first support member to the length of the battery cell assembly is greater than or equal to three-fifths.

[0031] In some embodiments, the battery pack includes a plurality of sub-boxes, all of which are stacked along a first direction, and each of the sub-boxes is provided with one of the battery cell assemblies.

[0032] In some embodiments, the battery cell assembly further includes a bus bar, and the battery cell is electrically connected to the bus bar;

[0033] Wherein, the first heat exchange component is connected to the pole of the adjacent battery core assembly or the busbar via a thermally conductive adhesive.

[0034] In a second aspect, an embodiment of the present invention provides an electrical device, comprising a battery pack as described above.

[0035] Beneficial effects of the embodiments of the present invention:

[0036] In an embodiment of the present invention, when the battery pack vibrates, at least part of the impact force of the first heat exchange component can be transmitted to the non-functional area of ​​the battery cell through the first support member, thereby avoiding the entire impact force of the first heat exchange component from directly acting on the functional area of ​​the battery cell. Ultimately, the technical problem that the structure in the functional area of ​​the battery cell is easily crushed by the first heat exchange component can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic structural diagram of a battery pack provided in an embodiment of the present invention.

[0039] Figure 2 for Figure 1 A cross-sectional view of the battery pack along the AA direction is shown.

[0040] Figure 3 for Figure 2 A partial enlarged view of the X in the figure.

[0041] Figure 4 for Figure 2 An exploded view of the battery pack's cell assembly and heat exchange assembly is shown.

[0042] Figure 5 A schematic structural diagram of a third support member provided in an embodiment of the present invention.

[0043] Figure 6 A schematic structural diagram of a second box cover assembly provided in an embodiment of the present invention.

[0044] Figure 7 for Figure 6 A schematic structural diagram of the fourth support member of the box cover assembly is shown.

[0045] Figure 8 for Figure 6 Exploded view of the tank cover assembly shown.

[0046] Fig. 9 An exploded view of the housing, the first heat exchange component and the battery cell assembly provided in an embodiment of the present invention.

[0047] Fig.10 for Fig. 9 The assembly drawing of the box body and the first heat exchange component is shown.

[0048] Fig.11 for Fig.10 A cross-sectional view of the box body and the first heat exchange component along the BB direction is shown.

[0049] Fig.12 for Fig.11 A local enlarged view of point Y in the figure.

[0050] Fig.13 for Fig.12 An exploded view of the first positioning structure is shown.

[0051] Fig.14 for Figure 1 A perspective view of the battery pack shown.

[0052] Fig.15 for Fig.14 Exploded view of the battery pack shown.

[0053] Fig.16 for Fig.14 A local enlarged view of point Z in the figure.

[0054] The numbers in the figure are:

[0055] 100. Battery cell assembly;

[0056] 11. battery cell; 111. output pole; 112. functional area; 113. non-functional area; 12. bus bar; 13. first gap;

[0057] 200. Heat exchange component;

[0058] 21, first heat exchange component; 211, second positioning structure; 211a, first positioning hole; 221, first buffer layer; 222, first support member; 223, second support member; 224, third support member; 23, second heat exchange component;

[0059] 300, box body;

[0060] 31. Sub-box; 311. Fixing ear; 312. Second positioning column; 313. Second positioning hole; 32. First positioning structure; 321. First positioning column; 322. Positioning bracket; 3221. Bracket bottom plate; 3222. Bracket side plate; 3223. Bracket top plate; 323. First locking component; 3224. First mounting hole; 3225. Second mounting hole; 3226. Third mounting hole; 33. Mounting part;

[0061] 400, box cover assembly;

[0062] 41. box cover; 42. second buffer layer; 421. second convex portion; 43. panel; 431. first convex portion; 4311. first convex rib; 4312. first convex bump; 432. first groove; 433. second groove; 44. fourth support member; 441. connecting recess; 4411. second section; 4412. third section; 4313. second convex rib; 442. first section; 45. first fastener; 46. second fastener;

[0063] 500, bottom cover;

[0064] 600, connecting plate;

[0065] H1, first direction; H2, second direction; H3, third direction. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0067] The embodiment of the present application provides a battery pack, which can be applied to electrical equipment. Electrical equipment can be but is not limited to means of transportation, smart wearable devices, mobile terminals, household appliances and medical devices, which are not limited to the embodiments of the present application. Means of transportation include but are not limited to cars, buses, trains, ships, flight equipment, etc. Smart wearable devices include but are not limited to smart watches, smart bracelets, cervical massagers, etc. Mobile terminals include but are not limited to smart phones, laptops, tablets, POS (point of sales terminal). Household appliances include but are not limited to televisions, washing machines, air conditioners, rice cookers, smart sweepers, smart lights, etc. Medical devices include but are not limited to infrared electronic thermometers, pulse oximeters, human body composition analyzers, etc. Of course, the battery pack can also be used for energy storage devices, which are not limited to the embodiments of the present application.

[0068] Please refer to Figure 1 , Figure 2 and Figure 3 The battery pack may include a cell assembly 100 and a heat exchange assembly 200. The cell assembly 100 includes a plurality of cells 11. The surface of one side where the output pole 111 of the cell 11 is located includes a functional area 112 and a non-functional area 113. The functional area 112 is provided with at least one of the output pole 111, a liquid injection hole and an explosion-proof valve. The heat exchange assembly includes a first heat exchange component 21 and a first support 222. The first heat exchange component 21 is provided on the side where the output pole 111 of the cell 11 is located. One side of the first support 222 abuts against the adjacent first heat exchange component 21, and the other side of the first support 222 abuts against the non-functional area 113 of the adjacent cell 11.

[0069] Therefore, when the battery pack vibrates, at least part of the impact force of the first heat exchange component 21 can be transmitted to the non-functional area 113 of the battery cell 11 through the first support member 222, thereby preventing all the impact force of the first heat exchange component 21 from directly acting on the functional area 112 of the battery cell 11. Ultimately, the technical problem that the structure in the functional area 112 of the battery cell 11 is easily crushed by the first heat exchange component 21 can be improved.

[0070] It is understandable that the functional area 112 may be provided with only one of the output pole 111, the injection hole and the explosion-proof valve, or may be provided with any two or more of the output pole 111, the injection hole and the explosion-proof valve, and the embodiment of the present application is not limited to this.

[0071] Please combine Figure 3 and Figure 4 In some embodiments, the battery cell assembly 100 further includes a bus bar 12. The battery cell 11 is electrically connected to the bus bar 12. The first heat exchange component 21 can be connected to the pole or bus bar 12 of the adjacent battery cell assembly 100 through a thermally conductive adhesive.

[0072] Then, the first support member 222 can be used to support the first heat exchange component 21 to prevent the first heat exchange component 21 from crushing the poles, busbars 12 and other structures of the adjacent battery cell assembly 100 .

[0073] In some embodiments, the first support member 222 may be made of an insulating material to prevent the first support member 222 from causing a short circuit inside the battery pack. For example, the first support member 222 may be made of plastic. Of course, the first support member 222 may also be made of a metal material, and an insulating layer may be provided on the surface of the first support member 222 to prevent the first support member 222 from causing a short circuit inside the battery pack, which is not limited in the present embodiment of the application.

[0074] In some embodiments, the first support member 222 may include a hard support member, thereby ensuring sufficient support strength of the first support member 222. For example, the first support member 222 may be an epoxy resin member, a glass fiber member, an epoxy resin and glass fiber composite member, etc., which is not limited in the embodiment of the present application.

[0075] In some embodiments, the first support member 222 may be a hollow structure, so that the first support member 222 has the advantage of lower weight, thereby reducing the overall strength of the battery pack.

[0076] Of course, in some other embodiments, the first support member 222 may also be a solid structure to improve the strength of the first support member 222. Also, part of the first support member 222 may be a hollow structure, and part of the first support member 222 may be a solid structure, which is not limited in the embodiment of the present application.

[0077] The number of the first support members 222 can be one or more, which is not limited in the present embodiment. When there are more than one first support members 222, the support force on each part of the first heat exchange component 21 can be more uniform and dispersed through the multiple first support members 222.

[0078] The first support member 222 can be arranged near the middle of the corresponding first heat exchange component 21, or near the side of the corresponding first heat exchange component 21, or multiple first support members 222 can be arranged along the length or width direction of the corresponding first heat exchange component 21, which is not limited in this embodiment of the present application.

[0079] In some embodiments, the first support member 222 may be overlapped with adjacent battery cells 11 .

[0080] For example, the first support member 222 may be located on the upper side of the overlapping battery cells 11, so that the first support member 222 is supported by the battery cells 11, so that the first support member 222 provides support from bottom to top to the adjacent first heat exchange component 21. Of course, the first support member 222 may also be located on the lower side of the overlapping battery cells 11, which is not limited in the embodiment of the present application.

[0081] It is understandable that the first support member 222 can be overlapped with the adjacent battery cells 11 by bonding, or by any other means such as clamping, welding, or melting, which is not limited in the embodiment of the present application.

[0082] That is, the overlapping first support member 222 and the battery cell 11 can be fixedly connected to each other, thereby preventing the first support member 222 from shifting during use, thereby improving the reliability and stability of the battery pack.

[0083] In some embodiments, the battery cell assembly 100 includes at least two columns of battery cells 11 , and the first support member 222 may overlap with two adjacent columns of battery cells 11 .

[0084] It is understandable that when the battery pack vibrates, relative displacement is likely to occur between two adjacent columns of battery cells 11. Therefore, by overlapping the support member 22 with the two adjacent columns of battery cells 11, the amplitude of the relative displacement between the two adjacent columns of battery cells 11 is reduced, thereby improving the stability of the installation of the battery cell assembly 100. Accordingly, it can also avoid the amplitude of the relative displacement between the two adjacent columns of battery cells 11 being too large, which may cause the stress of the first heat exchange component 21 located above the junction of the two adjacent columns of battery cells 11 to be too concentrated, thereby reducing the probability of damage to the first heat exchange component 21.

[0085] In some embodiments, each end of the first support member 222 in the width direction overlaps a column of battery cells 11. Along the width direction of the first support member 222, the width of the overlapped portion of the first support member 222 and each column of battery cells 11 is greater than or equal to 3 mm.

[0086] Furthermore, the first support member 222 can have a sufficiently large overlap area with each column of battery cells 11. Thus, on the one hand, the stability of the connection between the first support member 222 and each column of battery cells 11 can be ensured; on the other hand, even if there is a certain error in the assembly process of the first support member 222, it can still overlap the battery cells 11.

[0087] For example, along the width direction of the first support member 222, the width of the overlapping portion of the first support member 222 and each column 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.

[0088] In some embodiments, the width of the first support member 222 may be greater than or equal to 12 mm. Thus, a sufficiently wide first support member 222 can ensure the width of the portion where the first support member 222 overlaps each column of battery cells 11, thereby ensuring the stability and reliability of the overlap of the first support member 222.

[0089] For example, the width of the first support member 222 may 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.

[0090] In some embodiments, the number of the battery cell assemblies 100 is at least two, and all the battery cell assemblies 100 may be arranged along the first direction H1 , so that the power storage capacity of the battery pack may be increased by the plurality of battery cell assemblies 100 .

[0091] It should be noted that the first direction H1 may be a vertical direction or other directions. In the embodiment of the present application, the first direction H1 is mainly described as a vertical direction.

[0092] In some embodiments, each battery cell assembly 100 is provided with a first heat exchange component 21 and a first support member 222 on the same side along the first direction H1. Thus, the same side (such as the top) of each battery cell assembly 100 can exchange heat through the corresponding first heat exchange component 21 to improve the accuracy and reliability of temperature regulation at each battery cell assembly 100.

[0093] In some embodiments, 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. 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 each other.

[0094] It should be noted that the first direction H1 may be a vertical direction (or the height direction of the battery pack), the second direction H2 may be a front-to-back direction (or the width direction of the battery pack), and the third direction H3 may be a 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 are interchangeable, and the embodiments of the present application do not limit this. In the following, the embodiments of the present application continue to be mainly explained by taking the first direction H1 as a vertical direction as an example.

[0095] There are multiple first support members 222 , at least two first support members 222 are arranged at intervals along the second direction H2 , and each first support member 222 is extended along the third direction H3 .

[0096] Therefore, on the one hand, in the width direction of the battery pack (i.e., the second direction H2), multiple first support members 222 can be used to provide support for different positions of the first heat exchange component 21, so that the first heat exchange component 21 is subjected to more uniform force at various locations in the width direction of the battery pack. On the other hand, in the length direction of the battery pack (i.e., the third direction H3), each first support member 222 can be used to provide support for the first heat exchange component 21 at various locations in the length direction, so that the first heat exchange component 21 is subjected to more uniform force at various locations in the length direction of the battery pack.

[0097] As mentioned above, in some embodiments, the battery cell assembly 100 includes at least two columns of battery cells 11 . Then, the first support member 222 may overlap with two adjacent columns of battery cells 11 .

[0098] In some embodiments, a first gap 13 is provided between two adjacent columns of battery cells 11 in the same battery cell assembly 100 , and at least one first support member 222 is disposed corresponding to at least one first gap 13 along the first direction H1 .

[0099] In some embodiments, at least one first gap 13 in each battery cell assembly 100 is disposed corresponding to a first support member 222 along the first direction H1.

[0100] In some embodiments, each first gap 13 of at least one battery cell assembly 100 may be arranged corresponding to a first support member 222 along the first direction H1.

[0101] In some embodiments, the first support member 222 is extended along the length direction of the battery cell assembly 100. The ratio of the length of the first support member 222 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 first support member 222 can provide better support to more positions of the first heat exchange component 21, so that the support force provided by the first support member 222 is more dispersed and uniform.

[0102] For example, the ratio of the length of the first support member 222 to the length of the battery cell assembly 100 is greater than or equal to three-fifths, four-fifths, five-sixths, six-sevenths, seven-eighths or eight-ninths, and the length of the first support member 222 may even be equal to the length of the battery cell assembly 100, which is not limited in the embodiments of the present application.

[0103] The above are some examples of the first support member 222 in the embodiment of the present application.

[0104] In some embodiments, the heat exchange assembly 200 further includes a second support member 223. The second support member 223 is located between the first heat exchange component 21 and the adjacent battery cell assembly 100 at the top.

[0105] That is, between two adjacent battery cell assemblies 100, the first support member 222 is arranged between the first heat exchange component 21 and the bottom battery cell assembly 100 to support the first heat exchange component 21, and the second support member 223 is located between the first heat exchange component 21 and the top battery cell assembly 100 to directly or indirectly provide support to the top battery cell assembly 100.

[0106] The number of the second supporting members 223 may be one or more, which is not limited in the embodiment of the present application.

[0107] In some embodiments, the heat exchange assembly 200 also includes at least two second heat exchange components 23, and a second heat exchange component 23 is provided on the side of the battery cell assembly 100 facing away from the first heat exchange component 21 for heat exchange, so that heat is exchanged on the upper and lower sides of each battery cell assembly 100 through the first heat exchange assembly 200 and the second heat exchange assembly 200, so that the temperature of each position of each battery cell assembly 100 in the battery pack is more accurately controllable.

[0108] Then, the second support member 223 may be sandwiched between the adjacent first heat exchange components 21 and second heat exchange components 23 , so as to indirectly support the battery cell assembly 100 located above by supporting the second heat exchange component 23 .

[0109] In some embodiments, the structural strength of the second heat exchange component 23 is greater than the structural strength of the first heat exchange component 21 .

[0110] Then, when the battery pack is impacted, the upper battery cell assembly 100 is heavy, so it is easy to directly cause a large impact on the second heat exchange component 23 located below it. Therefore, the structural strength of the second heat exchange component 23 is greater than the structural strength of the first heat exchange component 21, which can effectively prevent the second heat exchange component 23 from being damaged by the direct impact of the upper battery cell assembly 100.

[0111] In some embodiments, the thickness of the second heat exchange component 23 is greater than the thickness of the first heat exchange component 21 , so that the structural strength of the second heat exchange component 23 is greater than the structural strength of the first heat exchange component 21 .

[0112] In some embodiments, the first heat exchange component 21 includes a stamped plate, which forms a flow channel for the cooling medium to flow. The second heat exchange component 23 includes an extruded plate, which forms a flow channel for the cooling medium to flow.

[0113] Therefore, the first heat exchange component 21 formed by stamping the plate will be thinner than the second heat exchange component 23 formed by extrusion, so that the structural strength of the second heat exchange component 23 is greater than the structural strength of the first heat exchange component 21 .

[0114] When the first heat exchange component 21 includes a stamped plate, two stamped plates may be stacked and connected to form a flow channel for the cooling medium to flow between the two stamped plates.

[0115] In some embodiments, a flow channel for the flow of cooling medium is provided in the first heat exchange component 21, and the second support member 223 abuts against a non-flow channel area of ​​the adjacent first heat exchange component 21, thereby preventing the impact force on the second heat exchange component 23 from being directly transmitted to the flow channel area of ​​the first heat exchange component 21 below through the second support member 223, thereby preventing the cooling medium from leaking after the flow channel area of ​​the first heat exchange component 21 is damaged and causing a short circuit inside the battery pack.

[0116] Of course, in some other embodiments, the first heat exchange component 21 may also include a first heating film for heating the battery cell assembly 100 , which is not limited in the embodiment of the present application.

[0117] In some other embodiments, the second heat exchange component 23 may further include a second heating film for heating the battery cell assembly 100 , which is not limited in the embodiment of the present application.

[0118] In some embodiments, the second support member 223 may be made of an insulating material to prevent the second support member 223 from causing a short circuit inside the battery pack. For example, the second support member 223 may be made of plastic. Of course, the second support member 223 may also be made of a metal material, and an insulating layer may be provided on the surface of the second support member 223 to prevent the second support member 223 from causing a short circuit inside the battery pack, which is not limited in the present embodiment of the application.

[0119] In some embodiments, the second support member 223 may include a hard support member, thereby ensuring sufficient support strength of the second support member 223. For example, the second support member 223 may be an epoxy resin member, a glass fiber member, an epoxy resin and glass fiber composite member, etc., which is not limited in the embodiment of the present application.

[0120] Of course, the second support member 223 may further include a first buffer layer 221. For example, the first buffer layer 221 is disposed on at least one side surface of the second support member 223.

[0121] For example, the first buffer layer 221 may abut against the second heat exchange component 23. Furthermore, when the battery pack vibrates, the first buffer layer 221 may prevent the second heat exchange component 23 and the first heat exchange component 21 from vibrating.

[0122] The first buffer layer 221 may be a silicone foam member or any other elastic member, which is not limited in the embodiment of the present application.

[0123] In some embodiments, the second support member 223 may be a hollow structure, so that the second support member 223 has the advantage of lower weight, thereby reducing the overall strength of the battery pack.

[0124] Of course, in some other embodiments, the second support member 223 may also be a solid structure to improve the strength of the second support member 223. Also, part of the second support member 223 may be a hollow structure, and part of the second support member 223 may be a solid structure, which is not limited in the embodiment of the present application.

[0125] In some embodiments, the second support member 223 is extended along the length direction of the battery cell assembly 100. The ratio of the length of the second support member 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 member 223 can provide better support for 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 member 223 is more dispersed and uniform.

[0126] For example, the ratio of the length of the second support member 223 to the length of the battery cell assembly 100 is greater than or equal to three-fifths, four-fifths, five-sixths, six-sevenths, seven-eighths or eight-ninths, and the length of the second support member 223 can even be equal to the length of the battery cell assembly 100, which is not limited in the embodiments of the present application.

[0127] It is understandable that the number of the second support members 223 may be one or more, and the present application embodiment does not limit this. When the number of the second support members 223 is at least two, the support effect can be improved by multiple second support members 223, thereby improving the stability and reliability of the battery pack.

[0128] In some embodiments, the first support member 222 and / or the second support member 223 may be in the shape of an elongated strip, thereby providing support to the second heat exchange component 23 and the first heat exchange component 21 while preventing the plate-shaped second support member 223 from causing the battery pack to be too heavy.

[0129] The second support member 223 can be arranged near the middle of the corresponding first heat exchange component 21, or near the side of the corresponding first heat exchange component 21, or multiple second support members 223 can be arranged along the length or width direction of the corresponding first heat exchange component 21, which is not limited in this embodiment of the present application.

[0130] As mentioned above, in some embodiments, 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 multiple columns of battery cells 11 of the same battery cell assembly 100 are arranged along the second direction H2. 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 each other.

[0131] There are multiple second support members 223 , at least two second support members 223 are arranged at intervals along the second direction H2 , and each second support member 223 is extended along the third direction H3 .

[0132] Therefore, on the one hand, in the width direction of the battery pack (i.e., the second direction H2), multiple second support members 223 can be used to provide support for different positions of the second heat exchange component 23, so that the force on the second heat exchange component 23 in the width direction of the battery pack is more uniform. On the other hand, in the length direction of the battery pack (i.e., the third direction H3), each second support member 223 can be used to provide support for the second heat exchange component 23 in the length direction, so that the force on the second heat exchange component 23 in the length direction of the battery pack is more uniform.

[0133] As mentioned above, in some embodiments, there is a first gap 13 between two adjacent columns of battery cells 11 in the same battery cell assembly 100. Then, at least one first gap 13 in each battery cell assembly 100 may be arranged corresponding to a second support member 223 along the first direction H1.

[0134] Then, it can also be understood that the second support member 223 is located at the lower side of the first gap 13. It can also be understood that when the battery pack vibrates, relative displacement is likely to occur between two adjacent columns of battery cells 11, resulting in the stress formed inside the second heat exchange component 23 being mainly concentrated in the area located at the lower side of the first gap 13. Therefore, by arranging the second support member 223 at the lower side of the first gap 13, support can be provided for the area corresponding to the second heat exchange component 23 and the first gap 13, so as to reduce the probability of damage to the area corresponding to the second heat exchange component 23 and the first gap 13.

[0135] In some embodiments, each first gap 13 of at least one battery cell assembly 100 is disposed corresponding to a second support member 223 along the first direction H1.

[0136] In some embodiments, along the first direction H1, the gap between two adjacent battery cell assemblies 100 is D1, the height of the second support member 223 is D2, and the ratio of D1 to D2 is 13:4 to 13:5.

[0137] Thus, it is possible to avoid the second support member 223 being too small to cause the structural strength to be too low, or to avoid the second support member 223 being too small to cause the first heat exchange component 21 and the second heat exchange component 23 to be unable to be separated by a sufficiently large gap; it is also possible to avoid the second support member 223 being too large to waste more space in the battery pack, thereby improving the energy density of the battery pack.

[0138] Exemplarily, 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 to the embodiments of the present application.

[0139] In some embodiments, along the first direction H1, the height of the second support member 223 protruding from the corresponding first heat exchange component 21 is greater than or equal to 2 mm.

[0140] Thus, it is possible to avoid the second support member 223 being too small to cause the structural strength to be too low, or to avoid the second support member 223 being too small to cause the first heat exchange component 21 and the second heat exchange component 23 to be unable to be separated by a sufficiently large gap; it is also possible to avoid the second support member 223 being too large to waste more space in the battery pack, thereby improving the energy density of the battery pack.

[0141] For example, along the first direction H1, the height of the second support member 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 this embodiment of the present application.

[0142] In some embodiments, along the first direction H1, the gap between two adjacent battery cell assemblies 100 is D1, the sum of the height of two adjacent battery cell assemblies 100 and the gap between two adjacent battery cell assemblies 100 is D3, and the ratio of D1 to D3 is 3:20 to 1:15.

[0143] Therefore, it is possible to avoid the first heat exchange component 21 and / or the second heat exchange component 23 being easily damaged by the impact due to the small distance between two adjacent battery cell assemblies 100, and to avoid the energy density of the battery pack being reduced due to the large distance between two adjacent battery cell assemblies 100.

[0144] Exemplarily, 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.

[0145] In some embodiments, along the first direction H1, the gap between two adjacent battery cell assemblies 100 is D1, the height of the first support member 222 is D4, and the ratio of D1 to D4 is 13:6 to 13:7.

[0146] Thus, it is possible to avoid the situation where the height of the first support member 222 is too small, resulting in too low structural strength, or the situation where the height of the first support member 222 is too small, resulting in an inability to provide a sufficiently large gap between the first heat exchange component 21 and the battery cell assembly 100; it is also possible to avoid the situation where the height of the first support member 222 is too large, resulting in a waste of more space in the battery pack, thereby improving the energy density of the battery pack.

[0147] For example, the ratio of D1 to D4 is 13:6, 13:61, 13:623, 13:637, 13:641, 13:65, 13:67, 13:687, 13:69 or 13:7, which is not limited to the embodiments of the present application.

[0148] Please continue to refer to Figure 5 In some embodiments, the heat exchange assembly 200 further includes a third support member 224. The third support member 224 is disposed through the first heat exchange component 21 to be sandwiched between two adjacent battery core assemblies 100.

[0149] The above are some examples of the support member 22 in the embodiment of the present application.

[0150] like Figure 1As shown, the battery pack may further include a box body 300 , and the battery cell assembly 100 and the heat exchange assembly 200 are at least partially disposed in the box body 300 .

[0151] Please continue to refer to Figure 6 The battery pack may further include a box cover assembly 400. The box body 300 has a storage space and an opening connected to the storage space. The box cover assembly 400 includes a box cover 41 and a second buffer layer 42, and the box cover 41 is connected to the box body 300 to close the opening of the box body 300. The second buffer layer 42 is arranged on a side of the box cover 41 away from the storage space, and the buffering performance of the second buffer layer 42 is greater than the buffering performance of the box cover 41.

[0152] Therefore, during the installation process, the installer can step on the second buffer layer 42 of the box cover assembly 400 for installation, so that the second buffer layer 42 can provide a better buffering effect, thereby avoiding deformation or even damage of the box cover 41, and ultimately improving the technical problem that the box cover 41 of the battery pack is easily deformed or even broken during the installation process.

[0153] It should be noted that the buffering performance of the second buffer layer 42 is greater than that of the box cover 41, which can be understood as the second buffer layer 42 being easier to deform than the box cover 41. Therefore, when a user steps on the second buffer layer 42 of the box cover assembly 400, the second buffer layer 42 may deform before the box cover 41, and then the second buffer layer 42 provides buffering for the box cover 41.

[0154] For example, the second buffer layer 42 may include an elastic buffer layer. The elastic buffer layer may include foam, such as MMP foam (Microcel lular Polypropylene foam), EVA foam (Ethylene Vinyl Acetate Copolymer Foam), etc. The second buffer layer 42 may also include any structure with a buffering effect, such as an elastic rubber layer, which is not limited in the embodiments of the present application.

[0155] In some embodiments, the box cover assembly 400 further includes a panel 43. The panel 43 is disposed on a side of the second buffer layer 42 that is away from the box cover 41. The rigidity of the panel 43 is greater than the rigidity of the second buffer layer 42.

[0156] Then, during the installation process, the user may step on the panel 43. At this time, since the panel 43 is more rigid than the second buffer layer 42, it is less likely to deform, so that the force acting on the panel 43 can be dispersedly transmitted to various parts of the second buffer layer 42 through the panel 43, so that the second buffer layer 42 and the panel 43 can cooperate with each other to provide better buffering and supporting effects, so as to avoid deformation or even damage of the box cover 41.

[0157] The panel 43 may be a metal part, a hard plastic part, etc., so that the rigidity of the panel 43 is greater than the rigidity of the second buffer layer 42, which is not limited in the embodiment of the present application. For example, the panel 43 may be made of steel, such as high-strength steel of DP780 or the like, and of course the metal part may also be made of iron or alloy material, which is not limited in the embodiment of the present application.

[0158] In some embodiments, the box cover assembly 400 further includes a fourth support member 44. The fourth support member 44 is connected between the box cover 41 and the panel 43, and the rigidity of the fourth support member 44 is greater than the rigidity of the second buffer layer 42. Therefore, when the installer steps on the panel 43, on the one hand, the second buffer layer 42 and the panel 43 can be deformed adaptively to provide a better buffering effect, thereby avoiding damage to the box cover assembly 400; on the other hand, the fourth support member 44 can provide a better supporting effect on the corresponding part of the panel 43, so as to avoid the panel 43 and the second buffer layer 42 from deforming too much, which may cause the installer to step on the unstable state.

[0159] The fourth support member 44 may include a metal member, a hard plastic member, etc., which is not limited in the embodiment of the present application. For example, the metal member may be made of steel, such as high-strength steel of DP780 or the like, and of course the metal member may also be made of iron or alloy material, which is not limited in the embodiment of the present application.

[0160] In some embodiments, there are at least two fourth support members 44. Thus, by supporting multiple locations of the panel 43 with multiple fourth support members 44, not only can the installation of the panel 43 be more stable, but also the overall force of the panel 43 can be more dispersed and uniform, so that when the installer steps on the panel 43, the force on the panel 43 can be dispersed to the box cover 41, thereby preventing the box cover 41 from being deformed or even broken.

[0161] In some embodiments, at least two fourth support members 44 are disposed on opposite sides of the second buffer layer 42 , so that the fourth support members 44 can provide better support to the panel 43 from both sides of the second buffer layer 42 .

[0162] Exemplarily, a fourth support member 44 is disposed on each side of the second buffer layer 42 in the width direction and / or each side of the second buffer layer 42 in the length direction.

[0163] That is to say, the fourth support member 44 may be provided on each side of the second buffer layer 42 in the width direction, and the fourth support member 44 may not be provided on each side of the second buffer layer 42 in the length direction; or the fourth support member 44 may not be provided on each side of the second buffer layer 42 in the width direction, and the fourth support member 44 may be provided on each side of the second buffer layer 42 in the length direction; or the fourth support member 44 may be provided on each side of the second buffer layer 42 in the width direction, and the fourth support member 44 may be provided on each side of the second buffer layer 42 in the length direction, and the embodiments of the present application are not limited to this.

[0164] Therefore, compared with only setting the fourth support member 44 on one side of the second buffer layer 42, when the fourth support member 44 is provided on each side in the width direction of the second buffer layer 42, it is possible to avoid the panel 43 from collapsing or insufficient supporting force on one side in the width direction of the second buffer layer 42; when the fourth support member 44 is provided on each side in the length direction of the second buffer layer 42, it is possible to avoid the panel 43 from collapsing or insufficient supporting force on one side in the length direction of the second buffer layer 42.

[0165] Of course, in some other implementations, the number of the fourth support member 44 may also be one, which is not limited in the embodiment of the present application.

[0166] In some embodiments, the fourth support member 44 is connected and fixed to the panel 43, so it can also be understood that the fourth support member 44 is installed on the panel 43 to avoid displacement and falling off of the panel 43, thereby ensuring the stability and reliability of the box cover assembly 400.

[0167] In some embodiments, the fourth support member 44 is connected and fixed to the box cover 41. Therefore, it can also be understood that the fourth support member 44 is installed on the box cover 41 to prevent the panel 43 from shifting and falling off, thereby ensuring the stability and reliability of the box cover assembly 400.

[0168] It can also be understood that when the fourth support member 44 is respectively connected to the panel 43 and the box cover 41, if a fourth support member 44 is provided on each side in the width direction of the second buffer layer 42 and / or each side in the length direction of the second buffer layer 42, then when the user steps on the position corresponding to the panel 43 and the second buffer layer 42, the corresponding part of the panel 43 and the second buffer layer 42 will be recessed toward the box cover 41; at this time, the fourth support member 44 can limit the warping amplitude of the panel 43 located on both sides of the length direction and / or width direction of the second buffer layer 42, so as to avoid excessive deformation of the panel 43, and it can also be understood that the fourth support member 44 pulls the part of the panel 43 located on both sides of the length direction and / or width direction of the second buffer layer 42, so that the overall force of the panel 43 is more uniform and dispersed, thereby improving the stability and reliability of the box cover assembly 400.

[0169] Please continue to refer to Figure 7 and Figure 8 In some embodiments, the fourth support member 44 is bent and includes a plurality of connection recesses 441 that are recessed toward the box cover 41. The connection recesses 441 are connected and fixed to the box cover 41, so that the fourth support member 44 can form multiple connections with the box cover 41 through the plurality of connection recesses 441, so that the force between the fourth support member 44 and the box cover 41 is more uniform, so as to improve the stability and reliability of the connection between the fourth support member 44 and the box cover 41.

[0170] The fourth support member 44 may be a plate member. For example, the fourth support member 44 is a sheet metal member formed by bending, stamping, drawing, etc., so as to form a plurality of connection recesses 441 .

[0171] Exemplarily, the fourth support member 44 includes a plurality of first segments 442, and the first segments 442 and the connecting recess 441 are arranged at intervals along the length direction of the fourth support member 44. The connecting recess 441 includes a second segment 4411 and a plurality of third segments 4412, the second segment 4411 is connected to the box cover 41, one end of each third segment 4412 is bent and connected to the adjacent second segment 4411, and the other end of each third segment 4412 is bent and connected to the adjacent first segment 442.

[0172] Then, it can also be understood that the fourth support member 44 forms a plurality of arch structures bent toward the box cover 41 through a plurality of second sections 4411 and a plurality of third sections 4412. Furthermore, on the basis that the fourth support member 44 is thin and light to reduce the weight of the battery pack, the embodiment of the present application can also increase the strength of the fourth support member 44 so that the fourth support member 44 can support the panel 43 more stably.

[0173] In some embodiments, the box cover assembly 400 further includes a first fastener 45. The first fastener 45 connects the box cover 41 and the box body 300, so that the box cover 41 can be stably and reliably mounted to the box body 300.

[0174] In some embodiments, at least part of the first fastener 45 is also disposed in the connection recess 441, so that the connection recess 441 is fixed to the box cover 41. Therefore, it can also be understood that the first fastener 45 is reused for connecting and fixing the box cover 41 and the fourth support member 44, so as to reduce the number of parts of the box cover assembly 400, thereby reducing the manufacturing and assembly difficulty of the box cover assembly 400.

[0175] In some embodiments, in the same fourth support member 44 , a plurality of connection recesses 441 are arranged along the edge of the box cover 41 , and the distance between two adjacent connection recesses 441 is 80 mm-100 mm.

[0176] Therefore, on the one hand, it can be avoided that the distance between two adjacent connecting recesses 441 is too large, which leads to insufficient strength of the fourth support member 44; on the other hand, it can be avoided that the distance between two adjacent connecting recesses 441 is too small, which leads to more processing steps and greater processing difficulty of the fourth support member 44.

[0177] For example, the spacing between two adjacent connecting recesses 441 can be 80 mm, 83 mm, 84.7 mm, 85 mm, 89 mm, 89.3 mm, 90 mm, 90.07 mm, 92 mm, 93 mm, 94.5 mm, 95 mm, 96.7 mm, 98 mm, 98.97 mm, 99 mm, 99.5 mm or 100 mm, which is not limited to the embodiments of the present application.

[0178] In some embodiments, in the same fourth support member 44, each connecting recess 441 is penetrated by a first fastener 45, so as to avoid the first fasteners 45 being spaced too far apart, thereby preventing the stability of the connection between the box cover 41 and the box body 300 from being reduced, and the airtightness between the box cover 41 and the box body 300 from being reduced.

[0179] In some embodiments, in the same fourth support member 44, no first fastener 45 is provided between two adjacent connecting recesses 441, thereby avoiding too many first fasteners 45 being provided due to too small a spacing between the first fasteners 45, and ultimately avoiding greater difficulty and higher cost in assembling the box cover assembly 400.

[0180] In some embodiments, at the same side edge of the box body 300, the number of first sections 442 between two adjacent first fasteners 45 is less than or equal to 1, thereby avoiding too many first fasteners 45 being arranged due to the spacing between the first fasteners 45 being too small, and ultimately avoiding greater difficulty in assembling the box cover assembly 400.

[0181] The first fastener 45 may be a fastening screw, such as a fastening screw of size M5. Of course, the first fastener 45 may also be a rivet, etc., which is not limited in the embodiment of the present application.

[0182] In some embodiments, the box cover assembly 400 may further include a second fastener 46, which connects the first section 442 and the panel 43. The second fastener 46 may be a fastening screw, such as a fastening screw of M5 size, and of course the first fastener 45 may also be a rivet, etc., which is not limited in the embodiment of the present application.

[0183] In some embodiments, the box cover assembly 400 may further include a third fastener, which is disposed through the panel 43 and the box cover 41 and connected to the box body 300, so as to fix both the panel 43 and the box cover 41 to the box body 300. Therefore, it can also be understood that the third fastener is used to connect and fix the panel 43 to the box body 300 on the basis of connecting and fixing the box cover 41 to the box body 300, so as to reduce the number of parts of the box cover assembly 400, thereby reducing the manufacturing and assembly difficulty of the box cover assembly 400.

[0184] Exemplarily, the third fastener may be inserted through the panel 43, the connecting recess 441 and the box cover 41 and connected to the box body 300, so that the panel 43, the fourth support member 44 and the box cover 41 are all locked and fixed to the box body 300. Then, it can also be understood that at least a part of the first fastener 45 forms the third fastener.

[0185] Exemplarily, the third fastener may be disposed through the panel 43, the first section 442 and the box cover 41 and connected to the box body 300, so that the panel 43, the fourth support member 44 and the box cover 41 are all locked and fixed to the box body 300. Then, it can also be understood that at least a part of the second fastener 46 forms the third fastener.

[0186] Of course, in some other implementations, the third fastener may not pass through the fourth support member 44, and this embodiment of the present application does not limit this.

[0187] In some embodiments, the thickness of the fourth support member 44 is 1 mm-2 mm, which can avoid the fourth support member 44 being too thin and causing the fourth support member 44 to have insufficient rigidity, and can also avoid the fourth support member 44 being too thick and causing the energy density of the battery pack to decrease.

[0188] Exemplarily, the thickness of the fourth support member 44 may be 1 mm, 1.1 mm, 1.27 mm, 1.3 mm, 1.5 mm, 1.67 mm, 1.79 mm, 1.85 mm, 1.9 mm or 2 mm, which is not limited in the embodiments of the present application.

[0189] The above are some examples of the fourth support member 44 in the embodiment of the present application. The following will continue to illustrate the embodiment of the present application with examples in combination with the structure of the panel 43.

[0190] In some embodiments, the second buffer layer 42 is only provided at one end of the box cover 41 along the length direction. Therefore, by only providing the second buffer layer 42 and the panel 43 at one end of the box cover 41 along the length direction, it can not only meet the installation personnel's stepping requirements during the installation process, but also reduce the consumables of the second buffer layer 42 and the panel 43, so as to reduce the overall weight and manufacturing cost of the battery pack.

[0191] In some embodiments, the panel 43 is provided with a reinforcement structure to increase the rigidity of the panel 43 .

[0192] For example, the reinforcement structure includes a first protrusion 431 protruding in a direction away from the second buffer layer 42. The height of the first protrusion 431 can be 2 mm to 3 mm, thereby avoiding the first protrusion 431 being too small and resulting in insufficient rigidity of the first protrusion 431, and avoiding the first protrusion 431 being too large and resulting in a decrease in the energy density of the battery pack.

[0193] Exemplarily, the height of the first convex hump 4312 may be 2 mm, 2.1 mm, 2.27 mm, 2.3 mm, 2.5 mm, 2.67 mm, 2.79 mm, 2.85 mm, 2.9 mm or 3 mm, which is not limited in the embodiments of the present application.

[0194] In some embodiments, the first convex portion 431 includes a first convex rib 4311 and a plurality of first convex bumps 4312. The first convex rib 4311 extends along the length direction of the panel 43, and a plurality of first convex bumps 4312 are arranged on each side of the first convex rib 4311 in the width direction.

[0195] It is understandable that as the length of the panel 43 increases, the rigidity of each location in the length direction of the panel 43 will decrease relatively, so the first rib 4311 extending along the length direction of the panel 43 can make the rigidity of each location in the length direction of the panel 43 higher. On this basis, the rigidity of each location in the width direction of the panel 43 can be ensured to be higher by using multiple first convex bumps 4312. Furthermore, when the installer steps on the panel 43, the force on the panel 43 can be more dispersed and uniform by the combination of the first rib 4311 and the multiple first convex bumps 4312.

[0196] In some embodiments, the ratio of the length of the first rib 4311 to the length of the panel 43 is greater than or equal to 0.7, so that the rigidity of the panel 43 at various locations along the length direction can be improved by having a sufficiently long first rib 4311 .

[0197] For example, the ratio of the length of the first rib 4311 to the length of the panel 43 is 0.7, 0.74, 0.76, 0.799, 0.8, 0.85, 0.869, 0.88, 0.892, 0.91, 0.95 or 1, which is not limited to this embodiment of the present application.

[0198] In some embodiments, on at least one side of the width direction of the first rib 4311, the first bulges 4312 are arranged along the length direction of the first rib 4311, and the first bulges 4312 are spaced apart from the first rib 4311 to form a first groove 432 between the first rib 4311 and the plurality of first bulges 4312, and a second groove 433 is formed between two adjacent first ribs 4311, one end of the second groove 433 is connected to the first groove 432, and the other end of the second groove 433 is connected to the outer peripheral side of the panel 43.

[0199] Therefore, it can also be understood that the first protrusion 431 defines a drainage groove on the side of the panel 43 away from the second buffer layer 42 to prevent some liquid from accumulating on the upper surface of the panel 43 during the assembly process or subsequent use, thereby causing safety hazards to the battery pack. The drainage groove includes a first groove 432 and a second groove 433.

[0200] In some embodiments, the first convex portion 431 further includes a second convex rib 4313, and each side edge of the panel 43 in the length direction is provided with a second convex rib 4313. Each end of the first convex rib 4311 is connected to the second convex rib 4313 on one side. The first convex bump 4312 is located between the second convex ribs 4313 on both sides. Thus, it can be understood that when the panel 43 is stepped on, the panel 43 is usually deformed at the edges around it, so the strength of the edge of the panel 43 can be improved by the cooperation of the second convex rib 4313 and the first convex rib 4311.

[0201] In some embodiments, the side surface of the panel 43 facing the second buffer layer 42 has the same shape as the side surface of the second buffer layer 42 facing the panel 43, so that each part of the panel 43 can be in contact with the second buffer layer 42, so that each part of the panel 43 can be better supported and buffered by the second buffer layer 42, and the force applied to the panel 43 can be evenly transferred to the box cover 41 through the second buffer layer 42.

[0202] For example, a second convex portion 421 is disposed on a surface of the second buffer layer 42 facing the panel 43 . The shape of the second convex portion 421 matches that of the first convex portion 431 , so as to be embedded in the side of the first convex portion 431 facing the second buffer layer 42 .

[0203] In some embodiments, the thickness of the second buffer layer 42 is D5, the sum of the thicknesses of the box cover 41, the second buffer layer 42 and the panel 43 is D6, and the ratio of D5 to D6 is greater than or equal to 2:3, that is, the ratio of D5 to D6 is greater than or equal to two-thirds, thereby preventing the second buffer layer 42 from being too thin, thereby ensuring that the box cover assembly 400 has sufficient buffering effect.

[0204] In some embodiments, the ratio of D5 to D6 is less than or equal to 7:8, that is, the ratio of D5 to D6 is less than or equal to seven eighths, thereby preventing the second buffer layer 42 from being too thick and preventing the energy density of the battery pack from being reduced.

[0205] For example, the ratio of D5 to D6 is 2:3, 3:4, 4:5, 5:6, 6:7 or 7:8, which is not limited in the embodiments of the present application.

[0206] In some embodiments, the thickness of the buffer layer is D5, and the thickness of the box cover is D7. The ratio of D5 to D7 is greater than or equal to 4, so that the second buffer layer 42 can be prevented from being too thin, so as to ensure that the box cover assembly 400 has sufficient buffering effect.

[0207] In some embodiments, the ratio of D5 to D7 is less than or equal to 15, so as to avoid the second buffer layer 42 being too thick and thus avoid reducing the energy density of the battery pack.

[0208] For example, the ratio of D5 to D7 may be 4, 4.5, 5, 5.7, 6, 6.9, 8, 9.5, 10.01, 11, 12.3, 13.8, 14, 14.5 or 15, which is not limited in the embodiments of the present application.

[0209] Please continue to refer to Fig. 9In some embodiments, the box body 300 is provided with a first positioning structure 32, and the first heat exchange component 21 is provided with a second positioning structure 211. The first positioning structure 32 and the second positioning structure 211 cooperate to be used for positioning when the first heat exchange component 21 is covered on the battery cell assembly 100.

[0210] It is understandable that in the related art, the first heat exchange component 21 is installed by the operator manually covering the first heat exchange component 21 on the battery cell assembly 100, and there is no positioning structure between the first heat exchange component 21 and the battery cell assembly 100 for guiding and positioning, which easily leads to position deviation when the first heat exchange component 21 is covered on the battery cell assembly 100. In contrast, in the embodiment of the present application, the first heat exchange component 21 can be positioned during the installation process through the cooperation of the first positioning structure 32 and the second positioning structure 211, thereby improving the technical problem of low position accuracy of the installation of the first heat exchange component 21.

[0211] It can also be understood that by improving the installation position accuracy of the first heat exchange component 21, the first heat exchange component 21 can more accurately provide a better heat exchange effect for each position of the battery cell assembly 100, thereby avoiding large temperature differences between battery cells 11 at different positions, thereby improving the service life and reliability of the battery pack.

[0212] Please continue to refer to Fig.10 , Fig.11 and Fig.12 One of the first positioning structure 32 and the second positioning structure 211 includes a first positioning hole 211a, and the other of the first positioning structure 32 and the second positioning structure 211 includes a first positioning column 321, and the first positioning column 321 is inserted into the first positioning hole 211a. Therefore, during the installation process, the first heat exchange component 21 can be conveniently and quickly positioned by inserting the first positioning column 321 into the first positioning hole 211a, and the first heat exchange component 21 can also be preliminarily fixed.

[0213] Of course, in some other embodiments, one of the first positioning structure 32 and the second positioning structure 211 includes a first positioning groove, and the other of the first positioning structure 32 and the second positioning structure 211 includes a first positioning rib, and the first positioning rib is clamped in the first positioning groove. This embodiment of the present application is not limited to this.

[0214] Hereinafter, the technical solution of the embodiment of the present application is mainly illustrated in combination with the structure of the first positioning column 321 and the first positioning hole 211 a.

[0215] In some embodiments, the first positioning structure 32 further includes a positioning bracket 322. The positioning bracket 322 is installed on the box body 300, and the first positioning column 321 is protruded on the side of the positioning bracket 322 facing the first heat exchange component 21. Then, in the actual assembly process, the first positioning column 321 can be firstly set on the positioning bracket 322, so that the first positioning column 321 can be more stably and reliably installed on the box body 300 through the positioning bracket 322; and compared with the first positioning column 321 integrally formed on the box body 300, the split molding method can reduce the molding difficulty of the first positioning column 321.

[0216] In some embodiments, the first positioning column 321 is provided with a first locking component 323, and the first heat exchange component 21 is locked between the first locking component 323 and the positioning bracket 322. Therefore, after the first heat exchange component 21 is installed in place, the first heat exchange component 21 can be locked by the first locking component 323 to prevent the first heat exchange component 21 from shifting and falling off during subsequent use.

[0217] In addition, it can be understood that the first positioning column 321 is reused for positioning guidance during the installation of the first heat exchange component 21, as well as locking and fixing the first heat exchange component 21 after it is installed in place, thereby reducing the number of parts of the entire battery pack, making the interior of the battery pack more compact, thereby increasing the energy density of the battery pack and reducing the difficulty of assembling the battery pack.

[0218] Exemplarily, the first positioning column 321 may be provided with an external thread, and the first locking component 323 may be a nut, so that the first locking component 323 may be screwed to the first positioning column 321 .

[0219] Please continue to refer to Fig.13 In some embodiments, the positioning bracket 322 may include a bracket bottom plate 3221, a bracket side plate 3222, and a bracket top plate 3223. The bracket bottom plate 3221 is connected and fixed to the box body 300. One end of the bracket side plate 3222 is connected and fixed to the bracket bottom plate 3221. The bracket top plate 3223 is connected to a side of the bracket side plate 3222 away from the bracket bottom plate 3221, and the bracket top plate 3223 is connected and fixed to the first positioning column 321.

[0220] Furthermore, on one hand, the positioning bracket 322 can increase the contact area with the box body 300 through the bracket bottom plate 3221, so as to be stably installed on the box body 300; on the other hand, the positioning bracket 322 can also more stably support the first heat exchange component 21 through the bracket top plate 3223. On this basis, compared with the solid block structure of the positioning bracket 322, the hollow structure in which the bracket bottom plate 3221 and the bracket top plate 3223 are connected by the bracket side plate 3222 can make the positioning bracket 322 lighter, so as to reduce the overall weight of the battery pack.

[0221] In some embodiments, the first positioning column 321 is riveted or welded to the bracket top plate 3223 to improve the stability and reliability of the installation of the first positioning column 321, thereby ensuring the stability and reliability of the installation of the first heat exchange component 21.

[0222] In some embodiments, the bracket bottom plate 3221 is provided with a first mounting hole 3224 facing the first positioning column 321. The hole diameter of the first mounting hole 3224 is larger than the maximum outer diameter of the first positioning column 321, so that the first positioning column 321 can be mounted to the bracket top plate 3223 via the first mounting hole 3224.

[0223] For example, the bracket top plate 3223 is provided with a third mounting hole 3226 , the third mounting hole 3226 is provided corresponding to the first mounting hole 3224 , and the first positioning column 321 passes through the first mounting hole 3224 .

[0224] Then, taking the first positioning column 321 being fixed by riveting as an example, first, the riveting device can clamp the bracket bottom plate 3221 to fix the positioning bracket 322; then, the riveting head of the riveting device can carry the first positioning column 321 through the first mounting hole 3224, and then rivet the first positioning column 321 to the third mounting hole 3226. Accordingly, the first positioning column 321 can be a pressure rivet bolt, such as a pressure rivet bolt of size M5.

[0225] Continuing with the example of the first positioning column 321 being fixed by welding, first, the welding device can clamp the bracket bottom plate 3221 to fix the positioning bracket 322; then, the welding device can drive the first positioning column 321 to pass through the first mounting hole 3224 until the first positioning column 321 is inserted into the third mounting hole 3226; finally, the welding work head of the welding device welds the first positioning column 321 to the third mounting hole 3226. Accordingly, the first positioning column 321 can be a projection welding bolt, such as a projection welding bolt of size M5.

[0226] It can be seen that the bracket base plate 3221 of the embodiment of the present application makes the positioning bracket 322 have the advantage of easy clamping, so as to facilitate the clamping of the automated equipment. At the same time, through the third mounting hole 3226 on the bracket base plate 3221, it can also play a better guiding and positioning effect on the working head of automated equipment such as riveting equipment and welding equipment, so that the working head of the automated equipment can accurately install the first positioning column 321 on the positioning bracket 322, and finally improve the positioning accuracy of the installation of the first heat exchange component 21.

[0227] In some embodiments, both ends of the bracket bottom plate 3221 in the length direction are provided with second mounting holes 3225 for mounting and fixing to the box body 300, and the bracket side plate 3222 is located at the middle portion of the length direction protruding from the bracket bottom plate 3221. Thus, it is possible to avoid the bracket side plate 3222 and / or the bracket top wall connected to the bracket side plate 3222 interfering with the installation at the second mounting holes 3225. In addition, since both ends of the bracket bottom plate 3221 in the length direction are connected and fixed to the box body 300, the force on the bracket base can be made more uniform and reasonable.

[0228] In some embodiments, the bracket base plate 3221 can be riveted or screwed to the box body 300 through the second mounting hole 3225. For example, the bracket base plate 3221 can be riveted to the second mounting hole 3225 by M5 size blind rivets, which is not limited in this embodiment of the present application.

[0229] In some embodiments, the positioning bracket 322 may be an aluminum profile. For example, the positioning bracket 322 may be an aluminum extrusion formed by extrusion, and then processed by blanking, punching, CNC (Computer numerical control machine tools) processing, etc. Of course, the positioning bracket 322 may also be made of steel or any other material, which is not limited in the present embodiment of the application.

[0230] In some embodiments, the box body 300 is further provided with a mounting portion 33, the mounting portion 33 is located in the accommodating space, and the first positioning structure 32 is mounted on the mounting portion 33. Therefore, the connection between the first positioning structure 32 and the box body 300 can be prevented from being exposed, thereby ensuring the stability and reliability of the first positioning structure 32.

[0231] For example, the mounting portion 33 may be protruded from the inner wall of the accommodating space, and the positioning bracket 322 of the first positioning structure 32 (such as the bracket bottom plate 3221 of the positioning bracket 322 ) is installed on the mounting portion 33 .

[0232] The above are some examples of the connection method between the first positioning column 321 and the box body 300 in the embodiment of the present application. The following will continue to illustrate the embodiment of the present application with reference to the first positioning hole 211a.

[0233] In some embodiments, the number of the first positioning holes 211a is at least two. It is understandable that if only one first positioning hole 211a is provided, after the first positioning column 321 is inserted into the first positioning hole 211a, the first heat exchange component 21 also has the degree of freedom to rotate around the axis of the first positioning column 321. Therefore, in the embodiment of the present application, by providing at least two first positioning holes 211a, the rotation free end of the first heat exchange component 21 can be limited, thereby further improving the position accuracy of the installation of the first heat exchange component 21.

[0234] In some embodiments, at least one first positioning hole 211a is a waist-shaped hole. Then, taking the first positioning hole 211a being set in the first heat exchange component 21 as an example, if there is a certain error in the spacing between the two first positioning holes 211a during the processing of the first heat exchange component 21, the first positioning column 321 corresponding to the waist-shaped hole can be penetrated at different positions on the waist-shaped hole to avoid the first heat exchange component 21 being unable to be installed.

[0235] In some embodiments, at least one first positioning hole 211a is a circular hole, so that the circular hole can ensure the position accuracy of the first heat exchange component 21. The circular hole can be a circular hole with a diameter of φ7 or a circular hole of other sizes, which is not limited in the embodiment of the present application.

[0236] In some embodiments, the number of the first positioning holes 211a can be two, which can not only ensure the accuracy of the positioning of the first heat exchange component 21, but also avoid the need to set too many positioning brackets 322 and first positioning columns 321, which will increase the cost of the battery pack and increase the difficulty of installation.

[0237] In some embodiments, each end of the first heat exchange component 21 in the length direction is provided with a second positioning structure 211. Thus, during the installation process, both ends of the first heat exchange component 21 can be better positioned, and after the installation is completed, both ends of the first heat exchange component 21 can be better fixed.

[0238] Please continue to refer to Fig.14 and Fig.15 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 a battery cell assembly 100 is disposed in each sub-box body 31 .

[0239] Thus, by stacking multiple sub-boxes 31, the number of battery cell assemblies 100 in the battery pack can be increased to improve the energy storage capacity of the battery pack; and, by respectively installing part of the battery cell assemblies 100 in multiple sub-boxes 31, each sub-box 31 and the corresponding battery cell assembly 100 can form a small unit or a small module during the assembly process, thereby reducing the difficulty of installing each small unit or small module, and finally, multiple small units or small modules can be assembled to reduce the difficulty of assembling a large number of battery cell assemblies 100.

[0240] In some embodiments, along the first direction H1 , a sub-box 31 located at the outermost end is installed with a box cover assembly 400 , and another sub-box 31 is installed with a bottom cover 500 .

[0241] Please continue to refer to Fig.16 In some embodiments, the battery pack further includes at least one connecting plate 600 , and the outer walls of two adjacent sub-boxes 31 are 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 .

[0242] The connecting plate 600 and the sub-box 31 may be screwed and fixed by bolts, riveted and fixed by rivets, or welded and fixed, which is not limited in the embodiment of the present application.

[0243] In some embodiments, a fixing ear 311 is protruding from the outer wall of the sub-box 31 , and the fixing ears 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 by the fixing ears 311 .

[0244] The fixing ears 311 may be screwed and fixed by bolts, riveted and fixed by rivets, or welded and fixed, which is not limited in the embodiment of the present application.

[0245] In some embodiments, of two adjacent fixing ears 311 , one fixing ear 311 is provided with a second positioning column 312 , and the other fixing ear 311 is provided with a second positioning hole 313 , and the second positioning column 312 is passed through the second positioning hole 313 to improve the installation position accuracy of the two adjacent sub-boxes 31 .

[0246] In some embodiments, at least one side of the outer wall of the sub-box 31 along the second direction H2 is connected to a connecting plate 600, and at least one side of the outer wall of the sub-box 31 along the third direction H3 is provided with a fixing ear 311. The first direction H1, the second direction H2 and the third direction H3 are perpendicular to each other.

[0247] For example, the first direction H1 may be the height direction of the battery pack, the second direction H2 may be the width direction of the battery pack, and the third direction H3 may be the length direction of the battery pack, so that each side surface of two adjacent sub-boxes 31 can be stably and reliably connected and fixed. Of course, the specific directions of the first direction H1, the second direction H2, and the third direction H3 are interchangeable, and this embodiment of the present application does not limit this.

[0248] An embodiment of the present application also provides an electrical device, which may include the above-mentioned battery pack.

[0249] Electrical equipment may be, but is not limited to, transportation, smart wearable devices, mobile terminals, household appliances and medical devices, which are not limited in the embodiments of the present application. Transportation includes, but is not limited to, cars, buses, trains, ships, flight equipment, etc. Smart wearable devices include, but are not limited to, smart watches, smart bracelets, cervical massagers, etc. Mobile terminals include, but are not limited to, smart phones, laptops, tablet computers, POS (point of sales terminal). Household appliances include, but are not limited to, televisions, washing machines, air conditioners, rice cookers, smart sweepers, smart lights, etc. Medical devices include, but are not limited to, infrared electronic thermometers, pulse oximeters, human body composition analyzers, etc.

[0250] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, characterized in that: include: A cell assembly, the cell assembly comprising a plurality of cells, a surface of one side of the cell where the output pole is located comprising a functional area and a non-functional area, the functional area being provided with at least one of the output pole, the injection hole and the explosion-proof valve; and, A heat exchange component, the heat exchange component comprising a first heat exchange component and a first support member, the first heat exchange component is arranged on the side where the output pole of the battery cell is located, one side of the first support member abuts against the adjacent first heat exchange component, and the other side of the first support member abuts against the non-functional area of ​​the adjacent battery cell.

2. The battery pack according to claim 1, characterized in that: The battery cell assembly includes at least two columns of battery cells, and the first support member overlaps the two adjacent columns of battery cells.

3. The battery pack according to claim 2, characterized in that: Each side of the first support member in the width direction overlaps with a row of the battery cells; Along the width direction of the first support member, the width of the portion where the first support member overlaps with each column of the battery cells is greater than or equal to 3 mm.

4. The battery pack according to claim 1, characterized in that: The number of the battery cell assemblies is at least two, and all the battery cell assemblies are arranged in a vertical direction; The heat exchange assembly further includes a second support member, which is located between the first heat exchange component and the battery core assembly at the top.

5. The battery pack according to claim 4, characterized in that: The heat exchange assembly further includes at least two second heat exchange components, and each of the battery core assemblies is provided with the second heat exchange component on a side away from the first heat exchange component for heat exchange; The second support member is sandwiched between the adjacent first heat exchange components and the second heat exchange components.

6. The battery pack according to claim 5, characterized in that: The structural strength of the second heat exchange component is greater than the structural strength of the first heat exchange component.

7. The battery pack according to claim 6, characterized in that: The first heat exchange component comprises a stamped plate, wherein the stamped plate forms a flow channel for the cooling medium to flow; The second heat exchange component includes an extruded plate, and a flow channel for cooling medium to flow is formed in the extruded plate.

8. The battery pack according to claim 6, characterized in that: The thickness of the second heat exchange component is greater than the thickness of the first heat exchange component.

9. The battery pack according to claim 5, characterized in that: The first support member and / or the second support member abuts against the adjacent non-flow channel region of the first heat exchange component.

10. The battery pack according to claim 5, characterized in that: The second supporting member includes a first buffer layer, and the first buffer layer abuts against the second heat exchange component.

11. The battery pack according to claim 5, characterized in that: Along the vertical direction, the height of the second support member protruding from the connected first heat exchange component is greater than or equal to 2 mm; Along the vertical direction, the gap between two adjacent battery core assemblies is D1, the height of the second support member is D2, and the ratio of D1 to D2 is 13:4 to 13:5; and / or, Along the vertical direction, the gap between two adjacent battery cell assemblies is D1, the sum of the height of two adjacent battery cell assemblies and the gap between two adjacent battery cell assemblies is D3, and the ratio of D1 to D3 is 3:20 to 1:15; and / or, Along the vertical direction, the gap between two adjacent battery core assemblies is D1, the height of the first support member is D4, and the ratio of D1 to D4 is 13:6 to 13:

7.

12. The battery pack according to claim 5, characterized in that: The first support member and / or the second support member is a strip-shaped support member.

13. The battery pack according to claim 4, characterized in that: The heat exchange component further includes a third support member, which is passed through the first heat exchange component to be sandwiched between two adjacent battery core components.

14. The battery pack according to claim 1, characterized in that: The number of the battery cell assemblies is at least two, and all the battery cell assemblies are arranged along a first direction; each of the battery cell assemblies includes multiple columns of the battery cells, and multiple columns of the battery cells in the same battery cell assembly are arranged along a second direction, and multiple battery cells in the same column are arranged along a third direction, and the first direction, the second direction and the third direction intersect each other; There are multiple first support members, at least two of which are spaced apart along the second direction, and each of the first support members is extended along the third direction.

15. The battery pack according to claim 14, characterized in that: There is a first gap between two adjacent rows of battery cells in the same battery cell assembly, and at least one of the first supporting members and at least one of the first gaps are arranged correspondingly along the first direction.

16. The battery pack according to any one of claims 1 to 15, characterized in that: The first support member is extended along the length direction of the battery cell assembly, and the ratio of the length of the first support member to the length of the battery cell assembly is greater than or equal to three fifths.

17. The battery pack according to any one of claims 1 to 15, characterized in that: The battery pack includes a plurality of sub-boxes, all of which are stacked along a first direction, and each of which is provided with a battery cell assembly.

18. The battery pack according to any one of claims 1 to 15, characterized in that: The battery cell assembly further includes a bus bar, and the battery cell is electrically connected to the bus bar; Wherein, the first heat exchange component is connected to the pole of the adjacent battery core assembly or the busbar via a thermally conductive adhesive.

19. An electrical equipment, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 18.

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