Heat sink module of battery assembly, battery assembly, battery pack and electric device

Abstract

The utility model discloses a kind of heat absorption module of battery assembly, battery assembly, battery pack and electric equipment, the heat absorption module includes: shell and heat absorption material piece, the shell is equipped with containing cavity;The heat absorption material piece is located in the containing cavity, in first direction, every end of the shell is equipped with positioning structure. Thus, compared with cold plate, without arranging flow path, the structure of battery assembly can be simplified, it is beneficial to reduce failure rate, improve the thermal safety of battery assembly, and by being equipped with positioning structure at the two ends of shell along first direction respectively, heat absorption module can be positioned from the two ends of shell, it is beneficial to improve the installation accuracy of heat absorption module, thereby improve the forming quality of battery assembly.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a heat-absorbing module for a battery assembly, a battery assembly, a battery pack, and an electrical device. Background Technology

[0002] In existing technologies, battery modules typically use cold plates to cool the cells. When the cold plates are placed between adjacent cells, the positions of the cold plates and cells need to be installed and positioned. The installation accuracy of the cold plates will affect the arrangement of the cells, and thus affect the molding quality of the battery modules. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a heat-absorbing module for a battery assembly, which can be positioned from both ends of the outer casing, thereby improving the installation accuracy of the heat-absorbing module.

[0004] The heat-absorbing module of the battery assembly according to an embodiment of the present utility model includes: a housing, wherein a receiving cavity is provided inside the housing; a heat-absorbing material component, wherein the heat-absorbing material component is disposed in the receiving cavity, and a positioning structure is provided at each end of the housing in a first direction.

[0005] The heat absorption module of the battery assembly according to the present invention, compared with the cold plate, does not require the arrangement of flow paths, which can simplify the structure of the battery assembly, reduce the failure rate, and improve the thermal safety of the battery assembly. Furthermore, by providing positioning structures at both ends of the outer shell along the first direction, the heat absorption module can be positioned from both ends of the outer shell, which can improve the installation accuracy of the heat absorption module and thus improve the molding quality of the battery assembly.

[0006] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, each of the positioning structures is located in the middle of the housing in a second direction, the second direction intersecting the first direction and the third direction respectively.

[0007] According to some embodiments of the present invention, the minimum distance between the positioning structure and the edge of the outer shell in a second direction is greater than or equal to 1.5 mm, and the second direction intersects with the first direction.

[0008] According to some embodiments of the present invention, the heat absorption module of the battery assembly includes a first positioning part and a second positioning part spaced apart along a third direction, wherein the first direction intersects with the third direction.

[0009] According to some embodiments of the present invention, in the third direction, the distance between the first positioning part and the edge of the outer shell is smaller than the distance between the second positioning part and the edge of the outer shell.

[0010] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, the minimum distance between the first positioning part and the outer casing at the third-direction edge is greater than or equal to 3 mm.

[0011] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, both the first positioning part and the second positioning part protrude outward along the first direction.

[0012] According to some embodiments of the present invention, the heat absorption module of the battery assembly includes a housing portion and a cover plate. The housing portion is open on both sides in the first direction to form an opening. Each opening of the housing portion is sealed by the cover plate, and each cover plate is provided with the positioning structure.

[0013] According to some embodiments of the present invention, the heat absorption module of the battery assembly is an integral piece of each of the cover plates and the corresponding positioning structures.

[0014] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, in the first direction, the protrusion dimension of the first positioning part is H1, satisfying: 1.5mm≤H1≤5mm; and / or, in the first direction, the protrusion dimension of the second positioning part is H2, satisfying: 1.5mm≤H2≤5mm.

[0015] In the heat absorption module of the battery assembly according to some embodiments of the present invention, in the third direction, the extension dimension of the second positioning part is greater than the extension dimension of the first positioning part.

[0016] According to some embodiments of the present invention, the heat absorption module of the battery assembly has the first positioning part extending L1 along the third direction, satisfying: 8mm≤L1≤20mm.

[0017] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, the adjacent sidewalls of the first positioning part are connected by a chamfer, and the chamfer size of the first positioning part is r1, which satisfies: 0.5mm≤r1≤1.5mm.

[0018] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, the extension dimension of the second positioning part along the third direction is L2, which satisfies: 12mm≤L2≤30mm.

[0019] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, the adjacent sidewalls of the second positioning part are connected by a chamfer, and the chamfer size of the second positioning part is r2, which satisfies: 0.7mm≤r2≤1.5mm.

[0020] According to some embodiments of the present invention, the heat-absorbing module of the battery assembly is a gas-liquid phase change material or a gas-liquid-solid phase change material, and the outer shell is provided with an explosion-proof component, which is configured to break under a set pressure to release gas.

[0021] According to some embodiments of the present invention, in the third direction, the explosion-proof component is located on the side of the second positioning part opposite to the first positioning part.

[0022] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, the minimum distance between the second positioning part and the explosion-proof component is greater than or equal to 10 mm.

[0023] According to some embodiments of the present invention, in the heat-absorbing module of the battery assembly, the minimum distance between the explosion-proof component and the outer shell at the third-direction edge is greater than or equal to 5 mm.

[0024] According to some embodiments of the present invention, the heat absorption module of the battery assembly has a liquid injection hole in the outer shell, and in the third direction, the liquid injection hole is located on the side of the second positioning part away from the first positioning part.

[0025] According to some embodiments of the present invention, in the heat absorption module of the battery assembly, the minimum distance between the second positioning part and the liquid injection hole is greater than or equal to 10 mm.

[0026] According to some embodiments of the present invention, in the heat absorption module of a battery assembly, in the first direction, the liquid injection hole and the explosion-proof component are located on both sides of the housing.

[0027] The heat-absorbing module of the battery assembly according to some embodiments of the present invention further includes a frame disposed within a receiving cavity; wherein the frame is used to separate the heat-absorbing material or at least a portion of the heat-absorbing material is filled within the frame.

[0028] According to some embodiments of the present invention, the heat-absorbing module of the battery assembly has a frame structure in the form of a honeycomb plate or a mesh plate.

[0029] According to some embodiments of the present invention, the heat-absorbing module of the battery assembly has the frame spaced apart from the inner wall of the receiving cavity.

[0030] According to some embodiments of the present invention, the minimum distance between the frame and the inner wall of the receiving cavity in the first direction is 1mm-10mm; and / or, the minimum distance between the frame and the inner wall of the receiving cavity in the second direction is 0.3mm-3mm; and / or, the minimum distance between the frame and the inner wall of the receiving cavity in the third direction is 0.5mm-5mm; wherein the first direction, the second direction and the third direction intersect each other.

[0031] This utility model also proposes a battery assembly.

[0032] A battery assembly according to an embodiment of the present invention includes: a battery cell and a heat-absorbing module according to any of the above embodiments, wherein the battery cell and the heat-absorbing module are stacked together.

[0033] According to the battery assembly of this utility model embodiment, there are multiple battery cells, and the heat absorption module is provided between adjacent battery cells.

[0034] This utility model also proposes a battery pack.

[0035] The battery pack according to an embodiment of the present invention includes: the battery assembly according to any of the above embodiments.

[0036] This utility model also proposes an electrical device.

[0037] The electrical equipment according to the present invention includes: a battery pack according to any of the above embodiments.

[0038] The battery assembly, battery pack, electrical equipment, and heat absorption module have the same advantages as the prior art, and will not be repeated here.

[0039] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0040] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0041] Figure 1 This is a schematic diagram of a battery assembly according to an embodiment of the present utility model;

[0042] Figure 2 This is an isometric view of the heat-absorbing module according to an embodiment of the present utility model;

[0043] Figure 3This is an isometric view of the battery assembly and positioning plate according to an embodiment of the present utility model;

[0044] Figure 4 This is a top view of the battery assembly and positioning plate according to an embodiment of the present utility model;

[0045] Figure 5 yes Figure 4 Sectional view at point AA;

[0046] Figure 6 This is a left view of the heat-absorbing module according to an embodiment of the present utility model;

[0047] Figure 7 This is a right view of the heat-absorbing module according to an embodiment of the present utility model.

[0048] Figure label:

[0049] Battery assembly 1000; First direction F1; Second direction F2; Third direction F3;

[0050] Heat absorption module 100; battery cell 200; first positioning component 201; second positioning component 202;

[0051] Outer shell 1; Shell section 11; Cover plate 12;

[0052] Positioning structure 13; First positioning part 131; Second positioning part 132; Injection hole 14; Explosion-proof component 15; Sealing plug 16;

[0053] Heat-absorbing material component 2; frame 3; positioning plate 2000; second positioning groove 2001. Detailed Implementation

[0054] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0055] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] Hereinafter, with reference to the accompanying drawings, a heat-absorbing module 100 of a battery assembly according to an embodiment of the present invention will be described.

[0058] like Figures 1-7 As shown, the heat-absorbing module 100 of the battery assembly according to an embodiment of the present utility model includes: a shell 1 and a heat-absorbing material 2. The shell 1 is provided with a receiving cavity; the heat-absorbing material 2 is disposed in the receiving cavity. In the first direction F1, each end of the shell 1 is provided with a positioning structure 13.

[0059] First, such as Figures 1-5 As shown, the battery assembly 1000 includes a battery cell 200 and a heat-absorbing module 100, which are stacked together. The heat-absorbing module 100 includes a housing 1 and a heat-absorbing material 2. The housing 1 has a receiving cavity, and the heat-absorbing material 2 is disposed in the receiving cavity. The heat-absorbing material 2 can be made of a phase change material. The heat-absorbing material 2 is used to absorb the temperature of the battery cell 200 to prevent the battery cell 200 from becoming too hot and causing thermal runaway or to delay the spread rate of thermal runaway.

[0060] Understandably, compared to a cold plate, the heat absorption module 100 does not require flow paths, which simplifies the structure of the battery module 1000, reduces the processing difficulty of the battery module 1000, and the heat absorption module 100 is less prone to failure and has high reliability, which helps to improve the thermal safety of the battery module 1000.

[0061] In the first direction F1, each end of the outer shell 1 is provided with a positioning structure 13. The positioning structure 13 is adapted to be positioned and engaged with the installation tool. The positioning tool includes a robotic arm and a positioning plate 2000. The robotic arm is used to grab the outer shell 1 from both sides of the outer shell 1 in the first direction F1 and transfer the heat absorption module 100. The positioning structure 13 can be positioned and engaged with the robotic arm when the robotic arm grabs the outer shell 1. When the robotic arm transfers the heat absorption module 100 to the installation position, the heat absorption module 100 is located between the two positioning plates 2000. The positioning structure 13 can be positioned and engaged with the positioning plate 2000 to achieve secondary positioning of the heat absorption module 100, thereby accurately installing the heat absorption module 100.

[0062] The heat-absorbing module 100 of the battery assembly according to the present utility model embodiment does not require the arrangement of flow paths compared to the cold plate, which simplifies the structure of the battery assembly 1000, helps to reduce the failure rate, and improves the thermal safety of the battery assembly 1000. Furthermore, by providing positioning structures 13 at both ends of the outer shell 1 along the first direction F1, the heat-absorbing module 100 can be positioned from both ends of the outer shell 1, which helps to improve the installation accuracy of the heat-absorbing module 100 and thus improves the molding quality of the battery assembly 1000.

[0063] In some embodiments of this utility model, such as Figure 6 As shown, each positioning structure 13 can be positioned at the center of the housing 1 in the second direction F2, where the second direction F2 intersects the first direction F1. For example, the first direction F1 can be set as... Figure 2 The left and right directions are shown, and the second direction F2 is set as... Figure 2 The front and back directions are shown.

[0064] The above settings can improve the positioning effect of the positioning structure 13 on the heat absorption module 100, which is conducive to improving the installation accuracy of the heat absorption module 100 and improving the design rationality of the heat absorption module 100.

[0065] In some embodiments of this utility model, such as Figure 6 As shown, the minimum distance W1 between the positioning structure 13 and the edge of the outer shell 1 in the second direction F2 can be set to be greater than or equal to 1.5mm, such as 1.5mm, 2mm, 2.5mm, 3mm, etc., where the second direction F2 intersects the first direction F1. For example, the first direction F1 can be set as... Figure 2 The left and right directions are shown, and the second direction F2 is set as... Figure 2The front and rear directions are shown. This avoids stress concentration, improves the overall structural stability of the outer shell 1, and prevents the positioning structure 13 from interfering with other components.

[0066] In some embodiments of the present invention, each positioning structure 13 includes a first positioning part 131 and a second positioning part 132 spaced apart along a third direction F3, wherein the first direction F1 intersects with the third direction F3.

[0067] For example, refer to Figures 1-5 As shown, in the first direction F1, each positioning structure 13 includes a first positioning part 131 and a second positioning part 132. The first positioning part 131 and the second positioning part 132 are spaced apart along the third direction F3. The first direction F1 and the third direction F3 intersect, and the second direction F2 intersects both the first direction F1 and the third direction F3. For example, the first direction F1 can be set as... Figure 1 The left and right directions are shown, and the third direction F3 is set as... Figure 1 The vertical direction is shown, and the second direction F2 is set as... Figure 1 The front and back directions are shown.

[0068] The first positioning part 131 and the second positioning part 132 are adapted to cooperate with the installation tool for positioning. The positioning tool includes a robotic arm and a positioning plate 2000. The robotic arm is used to grab the outer shell 1 from both sides in the first direction F1 and transfer the heat absorption module 100. The first positioning part 131 can cooperate with the robotic arm for positioning when the robotic arm grabs the outer shell 1. When the robotic arm transfers the heat absorption module 100 to the installation position, the heat absorption module 100 is located between the two positioning plates 2000, and the second positioning part 132 can cooperate with the positioning plate 2000 for positioning, so as to realize the secondary positioning of the heat absorption module 100, thereby accurately installing the heat absorption module 100.

[0069] In some embodiments of this utility model, such as Figure 1 As shown, a first positioning member 201 and a second positioning member 202 can be provided on the battery cell 200. The first positioning member 201 corresponds to the first positioning part 131, and the second positioning member 202 corresponds to the second positioning part 132. The robotic arm can position and engage with the first positioning member 201 on the battery cell 200, and the positioning plate 2000 can position and engage with the second positioning member 202 to accurately install the battery cell 200. It should be noted that the first positioning member 201 and the second positioning member 202 can be separately machined or constructed from existing structures, for example, the electrode post can be constructed as the second positioning member 202. This reduces the types of positioning tools and helps to reduce costs.

[0070] During the installation process, a robotic arm can grasp the heat-absorbing module 100 and engage with the first positioning part 131 for coarse positioning. Then, the robotic arm can transport the heat-absorbing module 100 to the installation position, where the second positioning part 132 engages with the positioning plate 2000 for fine positioning, thus accurately installing the heat-absorbing module 100. This process is repeated until the heat-absorbing module 100 and the battery cell 200 are installed in place, thus producing the battery assembly 1000. This improves the installation accuracy of the heat-absorbing module 100.

[0071] It is understood that by providing a first positioning part 131 and a second positioning part 132 at the end of the outer casing 1 along the first direction F1, the first positioning part 131 and the second positioning part 132 can be used to cooperate with different installation tools to achieve dual positioning, which is beneficial to improve the installation accuracy of the heat absorption module 100 and thus improve the molding quality of the battery assembly 1000.

[0072] In some embodiments of this utility model, the first positioning part 131 and the robotic arm can be configured for a transitional fit, such as setting the tolerance of the first positioning part 131 to ±0.05mm. This ensures the stability of the fit between the robotic arm and the first positioning part 131, improving the stability of the heat absorption module 100 during operation.

[0073] In some embodiments of this utility model, the second positioning part 132 and the positioning plate 2000 can be configured with a clearance fit, for example, the fit tolerance between the second positioning part 132 and the positioning plate 2000 can be set to H7 / g6. This makes it easier for the second positioning part 132 and the positioning plate 2000 to fit together, thus reducing the installation difficulty of the heat absorption module 100.

[0074] In some embodiments of this utility model, such as Figure 6 As shown, in the third direction F3, the distance between the first positioning part 131 and the edge of the outer shell 1 is smaller than the distance between the second positioning part 132 and the edge of the outer shell 1. This makes it easier for the robotic arm to grasp the heat-absorbing module 100, reducing the assembly difficulty of the battery assembly 1000.

[0075] In some embodiments of this utility model, such as Figure 6 As shown, the minimum distance W2 between the first positioning part 131 and the edge of the outer shell 1 in the third direction F3 can be set to be greater than or equal to 3mm, such as 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. This can avoid stress concentration, improve the overall structural stability of the outer shell 1, and prevent the first positioning part 131 from interfering with other components.

[0076] In some embodiments of this utility model, such as Figure 2As shown, the first positioning part 131 and the second positioning part 132 are both protruding outward along the first direction F1. The robotic arm is provided with a corresponding first positioning groove, which is positioned and engaged with the first positioning part 131. The positioning plate 2000 is provided with a corresponding second positioning groove 2001, which is positioned and engaged with the second positioning part 132.

[0077] The above configuration can prevent the first positioning part 131 and the second positioning part 132 from squeezing the space of the accommodating cavity, which is conducive to increasing the size of the heat-absorbing material part 2 and improving the heat absorption effect of the heat-absorbing module 100.

[0078] In some embodiments of the present invention, the outer shell 1 includes a shell portion 11 and a cover plate 12. The shell portion 11 is open on both sides in the first direction F1 to form an opening. Each opening of the shell portion 11 is sealed by the cover plate 12, and each cover plate 12 is provided with a positioning structure 13.

[0079] For example, refer to Figure 2 As shown, the outer casing 1 includes a casing portion 11 and a cover plate 12. The casing portion 11 can be constructed as a rectangular hollow frame. The casing portion 11 is open on both sides in the first direction F1 to form openings. The cover plate 12 is matched with the openings. Each opening of the casing portion 11 is sealed by the cover plate 12. Each cover plate 12 is provided with a positioning structure 13. Specifically, the casing portion 11 can be constructed as an aluminum shell, and the casing portion 11 can be formed by bending process. The cover plate 12 and the casing portion 11 are welded together, such as by laser welding.

[0080] The above settings simplify the structure of the outer casing 1, reduce the processing difficulty of the outer casing 1, and improve the practicality of the heat absorption module 100.

[0081] In some embodiments of this utility model, each cover plate 12 and the corresponding positioning structure 13 can be configured as a single piece. Specifically, the cover plate 12 and the corresponding positioning structure 13 can be integrally stamped or integrally cast. This improves the structural stability of the positioning structure 13 and enhances the design rationality of the heat absorption module 100.

[0082] In some embodiments of this utility model, the thickness of the cover plate 12 can be set to a range of 3mm-5mm, such as 3mm, 4mm, 5mm, etc. This ensures that the cover plate 12 has sufficient resistance to deformation, improves the structural stability of the outer shell 1, and avoids the cover plate 12 being too thick, which would affect the overall weight of the outer shell 1, thus improving the design rationality of the heat absorption module 100.

[0083] In some embodiments of this utility model, the protruding dimension of the first positioning part 131 in the first direction F1 can be set to H1, satisfying: 1.5mm≤H1≤5mm. For example, the protruding dimension H1 of the first positioning part 131 can be 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. This ensures sufficient mating area between the robotic arm and the first positioning part 131, which is beneficial for improving the stability of the heat absorption module 100 during transport, and also avoids the first positioning part 131 from having an excessively large protruding dimension that occupies too much space, thus improving the design rationality of the heat absorption module 100.

[0084] In some embodiments of this utility model, in the first direction F1, the protrusion dimension of the second positioning part 132 can be set to H2, satisfying: 1.5mm≤H2≤5mm. For example, the protrusion dimension H2 of the second positioning part 132 can be 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. This ensures sufficient mating area between the positioning plate 2000 and the second positioning part 132, which is beneficial for improving the installation accuracy of the heat absorption module 100, and avoids the second positioning part 132 from occupying too much space due to an excessively large protrusion dimension, thus improving the design rationality of the heat absorption module 100.

[0085] In some embodiments of this utility model, such as Figure 6 As shown, on the third direction F3, the extension dimension of the second positioning part 132 is larger than the extension dimension of the first positioning part 131. This improves the positioning accuracy between the second positioning part 132 and the positioning plate 2000, thus enhancing the installation accuracy of the heat absorption module 100.

[0086] In some embodiments of this utility model, such as Figure 6 As shown, the first positioning part 131 can be constructed as a waist-shaped boss, extending along a third direction F3. The extension dimension of the first positioning part 131 along the third direction F3 is set as L1, satisfying: 8mm≤L1≤20mm. For example, the extension dimension L1 of the first positioning part 131 along the third direction F3 can be 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, etc. This ensures that there is sufficient mating area between the robotic arm and the first positioning part 131, which is beneficial to improving the stability of the heat absorption module 100 during the transfer process.

[0087] In some embodiments of this utility model, such as Figure 6As shown, the adjacent sidewalls of the first positioning part 131 can be connected by a chamfer, that is, the top wall and the peripheral wall of the first positioning part 131 can be connected by a chamfer. The chamfer size of the first positioning part 131 can be set to r1, satisfying: 0.5mm≤r1≤1.5mm. For example, the chamfer size r1 of the first positioning part 131 can be 0.5mm, 0.8mm, 1mm, 1.3mm, 1.5mm, etc.

[0088] The above-mentioned design prevents stress concentration, improves the structural stability of the first positioning part 131, and avoids the first positioning part 131 scratching the robotic arm, thus improving the design rationality of the heat absorption module 100. Furthermore, when the first positioning part 131 and the cover plate 12 are integrally stamped, the first positioning part 131 can meet process requirements, thereby ensuring smooth processing.

[0089] In some embodiments of this utility model, such as Figure 6 As shown, the second positioning part 132 can be constructed as a waist-shaped boss, extending along a third direction F3. The extension dimension of the second positioning part 132 along the third direction F3 is set as L2, satisfying: 12mm≤L2≤30mm. For example, the extension dimension L2 of the second positioning part 132 along the third direction F3 can be 12mm, 15mm, 18mm, 20mm, 25mm, 30mm, etc. This ensures that there is sufficient mating area between the positioning plate 2000 and the second positioning part 132, which is beneficial to improving the installation accuracy of the heat absorption module 100.

[0090] In some embodiments of this utility model, such as Figure 6 As shown, the adjacent sidewalls of the second positioning part 132 can be connected by a chamfer, that is, the top wall and the peripheral wall of the second positioning part 132 can be connected by a chamfer, and the chamfer size of the second positioning part 132 can be set to r2, satisfying: 0.7mm≤r2≤1.5mm. For example, the chamfer size r2 of the second positioning part 132 can be 0.7mm, 0.9mm, 1mm, 1.3mm, 1.5mm, etc.

[0091] The above-mentioned design prevents stress concentration, improves the structural stability of the second positioning part 132, and avoids scratching the positioning plate 2000 by the second positioning part 132, thus improving the design rationality of the heat absorption module 100. Furthermore, when the second positioning part 132 and the cover plate 12 are integrally stamped, the second positioning part 132 can meet the process requirements, thereby ensuring smooth processing.

[0092] In some embodiments of this utility model, such as Figure 7As shown, the heat-absorbing material component 2 can be configured as a gas-liquid phase change material component or a gas-liquid-solid phase change material component. A mounting hole is formed at one end of the outer casing 1 along the first direction F1. An explosion-proof component 15 is installed inside the mounting hole of the outer casing 1. The explosion-proof component 15 is configured to rupture under a set pressure to release gas. It should be noted that the explosion-proof component 15 can be a diaphragm-type pressure relief device. The set pressure range of the explosion-proof component 15 can be 0.4MPa-0.6MPa, and the diaphragm length range can be 10mm-30mm.

[0093] Specifically, when the battery cell 200 experiences thermal runaway, the gas-liquid phase change material (or gas-liquid-solid phase change material) absorbs a large amount of heat, and the gas-liquid phase change material changes from a liquid state to a gas state. The gas pressure in the containment cavity rises sharply. When the gas pressure in the containment cavity reaches the set pressure, the explosion-proof component 15 breaks to release gas.

[0094] It is understandable that by setting the heat-absorbing material component 2 as a gas-liquid phase change material component or a gas-liquid-solid phase change material component, the heat absorption capacity of the heat-absorbing material component 2 can be increased. Furthermore, by setting the explosion-proof component 15, the gas in the containment cavity can be discharged to the outside in a timely manner when the battery cell 200 experiences thermal runaway, so as to avoid excessive pressure in the containment cavity and cause the outer shell 1 to explode. This ensures that the heat-absorbing material component 2 is converted into gas as much as possible, thereby improving the reliability of the heat-absorbing module 100.

[0095] Further, it should be noted that in one embodiment of this utility model, the heat-absorbing material is a solid or liquid phase change material, such as paraffin wax, water, ethanol, isopropanol, n-heptane, inorganic salt solution, etc. In another embodiment of this utility model, the heat-absorbing material is at least one of hydrogel, hydrated salt, and colloid. For example, the heat-absorbing material includes one or more of polyacrylamide hydrogel, sodium polyacrylate hydrogel, polyvinyl alcohol hydrogel, poly(N-isopropylacrylamide) hydrogel, calcium chloride hexahydrate, sodium sulfate decahydrate, potassium nitrate trihydrate, silica sol, and gelatin colloid. The above-mentioned heat-absorbing material includes a matrix and a phase change material. The matrix is ​​used to bind the phase change material, absorb heat after heating, and cause the phase change material to detach from the matrix. The phase change material is one or more of water, ethanol, isopropanol, n-heptane, inorganic salt solution, etc.

[0096] In some embodiments of this utility model, such as Figure 7 As shown, on the third direction F3, the explosion-proof component 15 is located on the side of the second positioning part 132 opposite to the first positioning part 131. The first positioning part 131, the second positioning part 132, and the explosion-proof component 15 can be arranged sequentially along the third direction F3. Therefore, the end space of the heat absorption module 100 can be fully utilized, which helps to reduce the size of the heat absorption module 100 and improves the design rationality of the heat absorption module 100.

[0097] In some embodiments of this utility model, such as Figure 7As shown, the minimum distance L3 between the second positioning part 132 and the explosion-proof part 15 can be set to be greater than or equal to 10mm, such as 10mm, 11mm, 12mm, etc. This can prevent the mounting hole from adversely affecting the molding of the second positioning part 132 and improve the design rationality of the heat absorption module 100.

[0098] In some embodiments of this utility model, such as Figure 7 As shown, the minimum distance L4 between the explosion-proof component 15 and the outer shell 1 in the third direction F3 can be set to be greater than or equal to 5mm, such as 5mm, 5.5mm, 6mm, 6.5mm, 7mm, etc. This ensures that the explosion-proof component 15 and the edge of the outer shell 1 maintain a sufficient distance, which is beneficial to improving the structural stability of the outer shell 1 and preventing interference between the explosion-proof component 15 and other components, thus improving the reliability of the heat absorption module 100.

[0099] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the heat-absorbing material component 2 is a gas-liquid phase change material component. The outer shell 1 has a liquid injection hole 14 on one side along the first direction F1. The liquid injection hole 14 is used to introduce the gas-liquid phase change material component into the receiving cavity, and after liquid injection, the liquid injection hole 14 can be sealed by a sealing plug 16. Specifically, in the third direction F3, the liquid injection hole 14 is located on the side of the second positioning part 132 opposite to the first positioning part 131, so that the first positioning part 131, the second positioning part 132, and the liquid injection hole 14 can be arranged along the third direction F3. Therefore, the end space of the heat-absorbing module 100 can be fully utilized, which helps to reduce the size of the heat-absorbing module 100 and improves the design rationality of the heat-absorbing module 100.

[0100] In some embodiments of this utility model, such as Figure 6 As shown, the minimum distance L5 between the second positioning part 132 and the injection hole 14 can be set to be greater than or equal to 10 mm, such as 10 mm, 11 mm, 12 mm, etc. This can prevent the injection hole 14 from having an adverse effect on the molding of the second positioning part 132, and improve the design rationality of the heat absorption module 100.

[0101] In some embodiments of this utility model, such as Figure 2 , Figure 6 and Figure 7 As shown, in the first direction F1, the injection hole 14 and the explosion-proof component 15 are located on both sides of the outer casing 1. This prevents the structure on a single cover plate 12 from becoming too complex, reduces the molding difficulty of the cover plate 12, and improves the design rationality of the heat absorption module 100.

[0102] In some embodiments of this invention, the flatness of the cover plate 12 after welding can be set to be less than or equal to 0.5 mm. This ensures the installation accuracy of the heat absorption module 100.

[0103] In some embodiments of this utility model, such as Figure 5 As shown, the heat-absorbing module 100 also includes a frame 3, which is disposed within the receiving cavity. The frame 3 is used to separate the heat-absorbing material component 2, or at least partially fill the heat-absorbing material component 2 within the frame 3, so that the heat-absorbing material component 2 can be evenly distributed within the receiving cavity. Specifically, the heat-absorbing material filling rate should be greater than or equal to 98%. This improves the heat absorption effect of the heat-absorbing module 100, which is beneficial for improving the temperature uniformity of the battery cell 200, and also enhances the structural strength of the heat-absorbing module 100, thereby improving its resistance to deformation.

[0104] In some embodiments of this utility model, such as Figure 5 As shown, the frame 3 can be constructed as a honeycomb plate or a mesh plate. This allows for a more uniform distribution of the heat-absorbing material 2, improving the heat absorption effect of the heat-absorbing module 100 and enhancing the temperature uniformity of the battery assembly 1000.

[0105] In some embodiments of this utility model, such as Figure 5 As shown, the frame 3 is spaced apart from the inner wall of the receiving cavity. This avoids the frame 3 from being squeezed and collided with the outer shell 1, which helps protect the outer shell 1 and prevents the outer shell 1 from having gaps due to expansion, thus improving the design rationality of the heat absorption module 100.

[0106] In some embodiments of this utility model, the minimum distance between the skeleton 3 and the inner wall of the receiving cavity in the first direction F1 ranges from 1mm to 10mm, such as 1mm, 2mm, 5mm, 8mm, 10mm, etc.; the minimum distance between the skeleton 3 and the inner wall of the receiving cavity in the second direction F2 ranges from 0.3mm to 3mm, such as 0.3mm, 0.5mm, 1mm, 2mm, 3mm, etc.; the minimum distance between the skeleton 3 and the inner wall of the receiving cavity in the third direction F3 ranges from 0.5mm to 5mm, such as 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0107] With the above settings, a suitable distance can be maintained between the frame 3 and the outer shell 1, which can prevent the frame 3 from colliding with the outer shell 1 and avoid the gap between the frame 3 and the outer shell 1 being too large, thus affecting the arrangement of the heat-absorbing material component 2 and improving the design rationality of the heat-absorbing module 100.

[0108] This utility model also proposes a battery assembly 1000.

[0109] like Figure 1As shown, the battery assembly 1000 according to an embodiment of the present utility model includes: a battery cell 200 and a heat-absorbing module 100 according to any of the above embodiments, wherein the battery cell 200 and the heat-absorbing module 100 are stacked.

[0110] According to the embodiment of the present utility model, the battery assembly 1000 has a high installation accuracy of the heat absorption module 100, which can improve the molding quality of the battery assembly 1000 and improve the reliability of the battery assembly 1000.

[0111] In some embodiments of this utility model, such as Figure 3 As shown, multiple battery cells 200 can be configured, and these multiple battery cells 200 are stacked along the second direction F2, with heat absorption modules 100 provided between adjacent battery cells 200. This allows for sufficient cooling of the battery cells 200, improving the thermal safety of the battery assembly 1000.

[0112] This utility model also proposes a battery pack.

[0113] The battery pack according to an embodiment of the present invention includes: a battery assembly 1000 according to any of the above embodiments.

[0114] According to the battery pack of this utility model embodiment, the heat absorption module 100 has high installation accuracy, which can improve the molding quality of the battery assembly 1000, improve the reliability of the battery assembly 1000, and enhance the overall performance of the battery pack.

[0115] This utility model also proposes an electrical device.

[0116] The electrical equipment according to the fundamental utility model embodiment includes a battery pack according to any of the above embodiments. It should be noted that the electrical equipment can be a hybrid vehicle, a new energy vehicle, a drone, or other similar device.

[0117] According to the embodiments of the present invention, the heat absorption module 100 of the electrical equipment has high installation accuracy, which can improve the molding quality of the battery assembly 1000, improve the reliability of the battery assembly 1000, enhance the overall performance of the battery pack, and help improve the product competitiveness of the electrical equipment.

[0118] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0119] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat-absorbing module (100) for a battery assembly, characterized in that, include: The outer casing (1) has a receiving cavity inside; A heat-absorbing material component (2) is disposed in the receiving cavity. In the first direction (F1), each end of the outer shell (1) is provided with a positioning structure (13).

2. The heat-absorbing module (100) of the battery assembly according to claim 1, characterized in that, Each of the positioning structures (13) is located in the middle of the outer shell (1) in a second direction (F2), which intersects with the first direction (F1).

3. The heat-absorbing module (100) of the battery assembly according to claim 1 or 2, characterized in that, The minimum distance between the positioning structure (13) and the outer shell (1) on the edge in the second direction (F2) is greater than or equal to 1.5 mm, and the second direction (F2) intersects with the first direction (F1).

4. The heat-absorbing module (100) of the battery assembly according to claim 1, characterized in that, Each of the positioning structures (13) includes a first positioning part (131) and a second positioning part (132) spaced apart along a third direction (F3), the first direction (F1) intersecting the third direction (F3).

5. The heat-absorbing module (100) of the battery assembly according to claim 4, characterized in that, On the third direction (F3), the distance between the first positioning part (131) and the edge of the outer shell (1) is smaller than the distance between the second positioning part (132) and the edge of the outer shell (1).

6. The heat-absorbing module (100) of the battery assembly according to claim 5, characterized in that, The minimum distance between the first positioning part (131) and the edge of the outer shell (1) on the third direction (F3) is greater than or equal to 3 mm.

7. The heat-absorbing module (100) of the battery assembly according to claim 4, characterized in that, The first positioning part (131) and the second positioning part (132) are both arranged to protrude outward along the first direction (F1).

8. The heat-absorbing module (100) of the battery assembly according to claim 7, characterized in that, The outer casing (1) includes a casing portion (11) and a cover plate (12). The casing portion (11) is open on both sides in the first direction (F1) to form an opening. Each opening of the casing portion (11) is sealed by the cover plate (12). Each cover plate (12) is provided with the positioning structure (13).

9. The heat-absorbing module (100) of the battery assembly according to claim 8, characterized in that, Each of the cover plates (12) and the corresponding positioning structures (13) are integral pieces.

10. The heat-absorbing module (100) of the battery assembly according to claim 7, characterized in that, In the first direction (F1), the protrusion dimension of the first positioning part (131) is H1, satisfying: 1.5mm ≤ H1 ≤ 5mm; and / or, In the first direction (F1), the protrusion dimension of the second positioning part (132) is H2, which satisfies: 1.5mm≤H2≤5mm.

11. The heat-absorbing module (100) of the battery assembly according to claim 10, characterized in that, On the third direction (F3), the extension dimension of the second positioning part (132) is greater than the extension dimension of the first positioning part (131).

12. The heat-absorbing module (100) of the battery assembly according to claim 11, characterized in that, The first positioning part (131) extends along the third direction (F3) by an extension dimension of L1, satisfying: 8mm≤L1≤20mm.

13. The heat-absorbing module (100) of the battery assembly according to claim 12, characterized in that, The adjacent sidewalls of the first positioning part (131) are connected by a chamfer. The chamfer size of the first positioning part (131) is r1, which satisfies: 0.5mm≤r1≤1.5mm.

14. The heat-absorbing module (100) of the battery assembly according to claim 11, characterized in that, The extension dimension of the second positioning part (132) along the third direction (F3) is L2, which satisfies: 12mm≤L2≤30mm.

15. The heat-absorbing module (100) of the battery assembly according to claim 14, characterized in that, The adjacent sidewalls of the second positioning part (132) are connected by a chamfer. The chamfer size of the second positioning part (132) is r2, which satisfies: 0.7mm≤r2≤1.5mm.

16. The heat-absorbing module (100) of the battery assembly according to any one of claims 4-15, characterized in that, The heat-absorbing material component (2) is a gas-liquid phase change material component or a gas-liquid-solid phase change material component. The outer shell (1) is provided with an explosion-proof component (15), which is configured to break under a set pressure to release gas.

17. The heat-absorbing module (100) of the battery assembly according to claim 16, characterized in that, On the third direction (F3), the explosion-proof component (15) is located on the side of the second positioning part (132) away from the first positioning part (131).

18. The heat-absorbing module (100) of the battery assembly according to claim 17, characterized in that, The minimum distance between the second positioning part (132) and the explosion-proof part (15) is greater than or equal to 10 mm.

19. The heat-absorbing module (100) of the battery assembly according to claim 17, characterized in that, The minimum distance between the explosion-proof component (15) and the outer shell (1) on the third direction (F3) is greater than or equal to 5 mm.

20. The heat-absorbing module (100) of the battery assembly according to claim 16, characterized in that, The outer casing (1) is provided with a liquid injection hole (14), which is located on the side of the second positioning part (132) away from the first positioning part (131) in the third direction (F3).

21. The heat-absorbing module (100) of the battery assembly according to claim 20, characterized in that, The minimum distance between the second positioning part (132) and the injection hole (14) is greater than or equal to 10 mm.

22. The heat-absorbing module (100) of the battery assembly according to claim 20, characterized in that, In the first direction (F1), the injection hole (14) and the explosion-proof component (15) are located on both sides of the outer casing (1).

23. The heat-absorbing module (100) of the battery assembly according to claim 1, characterized in that, It also includes a skeleton (3), which is disposed in the receiving cavity; wherein the skeleton (3) is used to separate the heat-absorbing material (2) or at least part of the heat-absorbing material (2) is filled in the skeleton (3).

24. The heat-absorbing module (100) of the battery assembly according to claim 23, characterized in that, The skeleton (3) is constructed in the form of a honeycomb plate or a mesh plate.

25. The heat-absorbing module (100) of the battery assembly according to claim 23, characterized in that, The skeleton (3) is spaced apart from the inner wall of the receiving cavity.

26. The heat-absorbing module (100) of the battery assembly according to claim 25, characterized in that, The minimum distance between the skeleton (3) and the inner wall of the receiving cavity in the first direction (F1) ranges from 1mm to 10mm; and / or, The minimum distance between the skeleton (3) and the inner wall of the receiving cavity in the second direction (F2) ranges from 0.3 mm to 3 mm; and / or, The minimum distance between the skeleton (3) and the inner wall of the receiving cavity in the third direction (F3) is 0.5mm-5mm; wherein the first direction, the second direction and the third direction intersect each other.

27. A battery assembly (1000), characterized in that, include: The battery cell (200) and the heat-absorbing module (100) according to any one of claims 1-26 are stacked together.

28. The battery assembly (1000) according to claim 27, characterized in that, There are multiple battery cells (200), and the heat absorption module (100) is provided between adjacent battery cells (200).

29. A battery pack, characterized in that, include: The battery assembly (1000) according to claim 27 or 28.

30. An electrical appliance, characterized in that, include: The battery pack according to claim 29.

Images