Battery pack and electric equipment thereof
By designing the expansion section and connection section structure in the battery pack and the snap-fit method of the liquid cooling components, the problems of cell expansion space requirements and low cooling efficiency are solved, achieving lightweight and efficient thermal management of the battery pack and improving mechanical strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-04-01
- Publication Date
- 2026-05-08
AI Technical Summary
Existing battery packs require space to expand during cell expansion, resulting in increased volume and weight. Furthermore, traditional cooling methods are inefficient and consume a lot of materials, making it difficult to meet the requirements of efficient thermal management and lightweight design for new energy vehicles.
Design a battery pack structure in which the expansion portion of the casing and the connecting portion form an expansion space, and the liquid cooling component is snapped into the casing. The liquid cooling component is assembled with the battery cell to fix the battery cell, thereby reducing the use of support materials and improving mechanical strength and thermal management efficiency.
This achieves lightweighting and efficient thermal management of the battery pack, improves its mechanical strength and cooling efficiency, and optimizes the overall layout space of the battery pack.
Smart Images
Figure CN224217560U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of batteries, and in particular to a battery pack and its electrical equipment. Background Technology
[0002] Existing battery packs require sufficient space outside the cells to accommodate volume changes caused by material expansion during charging and discharging. This not only increases the size and weight of the battery pack but also limits the improvement of the overall energy density of the battery system.
[0003] Meanwhile, the cooling system of the power battery is crucial for ensuring the temperature stability of the battery pack, extending battery life, and improving safety. Traditional cooling methods may suffer from problems such as low cooling efficiency, high material consumption, and complex structure, making it difficult to meet the urgent needs of new energy vehicles for efficient thermal management, lightweight design, and rapid heat exchange. Utility Model Content
[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides a battery pack and its electrical equipment, wherein the housing is provided with an expansion portion and a connecting portion that define the expansion space for forming the electrode core, and is secured to the housing by a liquid cooling component, thereby improving thermal management efficiency. Simultaneously, it saves on the development of cell module support materials, achieving a lightweight battery pack and improving the overall mechanical strength of the battery pack.
[0005] To achieve the above objectives, this utility model provides a battery pack having a first direction, a second direction, and a third direction intersecting each other, and includes a battery cell and a liquid cooling assembly. The battery cell includes a housing and an electrode core.
[0006] The housing includes two first sidewalls disposed opposite to each other along the first direction and two second sidewalls disposed opposite to each other along the second direction. The first sidewalls and the second sidewalls enclose a core cavity, and the core is housed in the core cavity.
[0007] The first sidewall includes an expansion portion and a connecting portion. The expansion portion is connected to the second sidewall on both sides in the second direction through the connecting portion. The expansion portion protrudes from the connecting portion in a direction away from the pole core. An expansion groove is provided on the side of the expansion portion facing the pole core.
[0008] The liquid cooling component is provided with a first positioning port, and the housing is inserted into the first positioning port at one end in the second direction, and the liquid cooling component is engaged with the housing.
[0009] As a preferred embodiment, the projected area of the expanded portion on the plane perpendicular to the first direction is cmm². 2The projected area of the connecting part on the plane perpendicular to the first direction is dmm. 2 , where c > d.
[0010] As a preferred embodiment, the area of the second sidewall is smaller than the area of the first sidewall.
[0011] As a preferred embodiment, the liquid cooling assembly includes a first liquid cooling bracket, which is snapped into one end of the housing in the second direction.
[0012] As a preferred embodiment, the housing is respectively snapped with the first liquid cooling frame at both ends in the first direction.
[0013] As a preferred embodiment, the first liquid-cooled support includes a first manifold, a second manifold, and a plurality of first liquid-cooled branch pipes. The first manifold and the second manifold extend along the first direction, and the plurality of first liquid-cooled branch pipes extend along the third direction and are spaced apart along the first direction. The plurality of first liquid-cooled branch pipes are connected to the first manifold and the second manifold at their respective ends in the third direction. Adjacent first liquid-cooled branch pipes, first manifolds, and second manifolds enclose each other to form the first positioning port, and the first liquid-cooled branch pipes are snapped into the housing.
[0014] As a preferred embodiment, the liquid cooling assembly further includes a second liquid cooling bracket, a first liquid cooling pipe, a second liquid cooling pipe, and a third liquid cooling pipe. The second liquid cooling bracket is snapped onto the end of the housing away from the first liquid cooling bracket in the second direction. The first liquid cooling pipe and the second liquid cooling pipe are respectively connected to the third liquid cooling pipe. The first liquid cooling bracket is connected to the first liquid cooling pipe, and the second liquid cooling bracket is connected to the second liquid cooling pipe.
[0015] As a preferred embodiment, the first liquid-cooled branch pipe has a first liquid-cooled surface facing the first positioning port, and the first liquid-cooled surface is connected to the connecting part.
[0016] As a preferred embodiment, the expansion portion includes a first expansion surface and a second expansion surface. The second expansion surface is connected to the connecting portion at both ends in the second direction through the first expansion surface. The first liquid-cooled branch pipe has a second liquid-cooled surface, which is located at one end of the first positioning port in the second direction. The second liquid-cooled surface is connected to the first expansion surface.
[0017] As a preferred embodiment, the first manifold is provided with a third liquid-cooled surface, the third liquid-cooled surface facing the first positioning port, and the housing has a first end face at one end in the third direction, the third liquid-cooled surface being in contact with the first end face.
[0018] As a preferred embodiment, the second manifold is provided with a fourth liquid-cooled surface, which faces the first positioning port, and the housing has a second end face at one end in the third direction, with the fourth liquid-cooled surface fitting against the second end face.
[0019] An electrical device, including a battery pack.
[0020] Compared with the prior art, the battery pack and its electrical equipment according to this utility model embodiment have the following advantages: The first sidewall of the housing includes an expansion portion and a connecting portion. The expansion portion protrudes from the connecting portion in a direction away from the electrode core. An expansion groove is formed between the electrode core and the expansion portion in the first direction. The battery cell itself integrates the expansion space of the electrode core, reducing the material used in the expansion modules between cells, optimizing the overall layout space of the battery pack, and achieving a lightweight battery pack. One end of the housing in the second direction is inserted into the first positioning port of the liquid cooling assembly to fix the end of the housing. A limiting port is formed between the expansion portion and the connecting portion. The liquid cooling assembly is snapped into the housing to limit the assembly position of the liquid cooling assembly. By assembling the liquid cooling assembly with the battery cell, the battery cell is fixed, saving on the development of battery cell module support materials, improving the overall mechanical strength of the battery pack, and simultaneously improving the thermal management efficiency of the battery cell. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present utility model.
[0022] Figure 2 This is a schematic diagram of the structure of the battery cell according to an embodiment of this utility model.
[0023] Figure 3 This is an embodiment of the present utility model. Figure 2 A magnified structural diagram of point A in the diagram.
[0024] Figure 4 This is a cross-sectional schematic diagram of the internal structure of an embodiment of this utility model.
[0025] Figure 5 This is an embodiment of the present utility model. Figure 4 A magnified structural diagram of point B in the diagram.
[0026] Figure 6 This is a schematic diagram of the liquid cooling component of this utility model.
[0027] Figure 7 This is a schematic diagram of the assembly structure of the liquid cooling component and the heat spreader of this utility model.
[0028] Figure 8 This is a schematic diagram of the assembly structure of the liquid cooling component and the insulating heat insulation pad of this utility model.
[0029] Figure 9This is a schematic diagram of the component disassembly structure of Embodiment 1 of this utility model.
[0030] Figure 10 This is a schematic diagram of the component disassembly structure of Embodiment 2 of this utility model.
[0031] Figure 11 This is a schematic diagram of the component disassembly structure of Embodiment 3 of this utility model.
[0032] In the picture:
[0033] X, first direction; Y, second direction; Z, third direction;
[0034] 1. Battery cell; 11. Housing; 111. First sidewall; 1111. Expansion section; 11111. First expansion surface; 11112. Second expansion surface; 1112. Connecting part; 1113. Limiting port; 1114. Limiting groove; 1115. Expansion groove; 1117. Electrode core cavity; 112. Second sidewall; 113. First end face; 114. Second end face; 12. Electrode core;
[0035] 2. Liquid cooling assembly; 21. First liquid cooling bracket; 211. First manifold; 2111. Third liquid cooling surface; 212. Second manifold; 2121. Fourth liquid cooling surface; 213. First liquid cooling branch pipe; 2131. First liquid cooling surface; 2132. Second liquid cooling surface; 22. Second liquid cooling bracket; 221. Third manifold; 222. Fourth manifold; 223. Second liquid cooling branch pipe; 25. First positioning port; 26. First liquid cooling pipe; 27. Second liquid cooling pipe; 28. Third liquid cooling pipe;
[0036] 3. Thermally conductive structural adhesive layer;
[0037] 4. Heat spreader;
[0038] 5. Insulating and heat-insulating pads;
[0039] 6. Enclosure; 61. Receiving cavity; 62. Liquid cooling port. Detailed Implementation
[0040] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0041] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0042] In the description of this application, it should be noted that, unless otherwise expressly 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, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0044] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 89° to 91°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.
[0045] like Figures 1 to 11As shown, a preferred embodiment of the present utility model is a battery pack. The battery pack has a first direction X, a second direction Y and a third direction Z that intersect each other in pairs. It includes a battery cell 1 and a liquid cooling assembly 2. The battery cell 1 includes a housing 11 and an electrode core 12.
[0046] The housing 11 includes two first sidewalls 111 arranged opposite each other along the first direction X and two second sidewalls 112 arranged opposite each other along the second direction Y. The first sidewalls 111 and the second sidewalls 112 enclose each other to form a core cavity 1117, and the core 12 is housed in the core cavity 1117.
[0047] The first sidewall 111 includes an expansion portion 1111 and a connecting portion 1112. The expansion portion 1111 is connected to the second sidewall 112 on both sides of the second direction Y through the connecting portion 1112. The expansion portion 1111 protrudes from the connecting portion 1112 in the direction away from the pole core 12. An expansion groove 1115 is provided on the side of the expansion portion 1111 facing the pole core 12.
[0048] The liquid cooling assembly 2 is provided with a first positioning port 25. The housing 11 is inserted into the first positioning port 25 at one end in the second direction Y, and the liquid cooling assembly 2 is snapped into the housing 11.
[0049] An electrical appliance, such as Figure 1 as well as Figures 9-10 As shown, it includes a battery pack.
[0050] The battery pack and its electrical equipment of this utility model include an expansion portion 1111 and a connecting portion 1112 on the first side wall 111 of the housing 11. The expansion portion 1111 protrudes from the connecting portion 1112 in a direction away from the electrode core 12. An expansion groove 1115 is formed between the electrode core 12 and the expansion portion 1111 in the first direction X. The cell 1 itself integrates the expansion space of the electrode core 12, reducing the material used in the expansion modules between cells 1, optimizing the overall layout space of the battery pack, and achieving a lightweight battery pack. One end of the housing 11 is inserted into the first positioning port 25 of the liquid cooling assembly 2 in the second direction Y to fix the end of the housing 11. The liquid cooling assembly 2 is snapped into the housing 11 to limit the assembly position of the liquid cooling assembly 2. By assembling the liquid cooling assembly 2 with the cell 1, the cell 1 is fixed, saving the development of cell 1 module support materials, improving the overall mechanical strength of the battery pack, and improving the thermal management efficiency of the cell 1.
[0051] In one embodiment, a limiting port 1113 is defined between the expansion portion 1111 and the connecting portion 1112, and the liquid cooling component 2 is snapped into the limiting port 1113.
[0052] Furthermore, such as Figure 2 As shown, the projected area of the expansion portion 1111 on the plane perpendicular to the first direction X is cmm. 2The projected area of the connecting part 1112 on the plane perpendicular to the first direction X is dmm. 2 Where c > d. In the first direction X, the area occupied by the expansion portion 1111 on the first sidewall 111 is greater than the area occupied by the connecting portion 1112 on the first sidewall 111, providing a larger expansion space for the battery cell 1, which helps the battery cell 1 maintain its structural stability during the expansion process and reduces the performance degradation caused by structural damage.
[0053] Furthermore, such as Figures 1 to 2 as well as Figures 9 to 10 As shown, the liquid cooling assembly 2 includes a first liquid cooling bracket 21, which is snapped onto one end of the housing 11 in the second direction Y. This snap-fit method fixes the first liquid cooling bracket 21 to one end of the housing 11, simplifying the assembly process. The snap-fit assembly method does not require additional tools, thus improving assembly efficiency and reducing assembly costs.
[0054] In one embodiment, a limiting port 1113 is disposed at one end of the housing 11 in the second direction Y, and the first liquid cooling bracket 21 is engaged with the limiting port 1113. The limiting port 1113 provides a clear positioning for the first liquid cooling bracket 21, ensuring the accurate installation of the liquid cooling component 2 on the housing 11, which helps to improve the stability of the assembly structure of the liquid cooling component 2 and the housing 11, and also helps to ensure effective heat transfer between the first liquid cooling bracket 21 and the housing 11.
[0055] Furthermore, such as Figures 1 to 2 as well as Figures 9 to 10 As shown, the housing 11 is respectively engaged with the first liquid cooling bracket 21 at both ends of the first direction X. The first liquid cooling bracket 21 is respectively engaged with the limiting port 1113 at both ends of the first direction X to ensure the stable position of the first liquid cooling bracket 21 in the first direction X. Since the first liquid cooling bracket 21 is supported at both ends of the first direction X, the shaking or displacement of the first liquid cooling bracket 21 is avoided, thereby improving the stability of the entire structure.
[0056] In one embodiment, the housing 11 is provided with limiting ports 1113 at both ends of the first direction X, and the first liquid cooling bracket is respectively engaged with the limiting ports 1113 at both ends of the housing in the first direction X. Since the first liquid cooling bracket 21 is supported at both ends of the first direction X, the shaking or displacement of the first liquid cooling bracket 21 is avoided, thereby improving the stability of the entire structure.
[0057] Furthermore, such as Figure 6 as well as Figure 8As shown, the first liquid-cooled support 21 includes a first manifold 211, a second manifold 212, and a plurality of first liquid-cooled branch pipes 213. The first manifold 211 and the second manifold 212 extend along a first direction X, and the plurality of first liquid-cooled branch pipes 213 extend along a third direction Z and are spaced apart along the first direction X. The plurality of first liquid-cooled branch pipes 213 are connected to the first manifold 211 and the second manifold 212 at their respective ends in the third direction Z. Adjacent first liquid-cooled branch pipes 213, first manifold 211, and second manifold 212 enclose a first positioning port 25. The first liquid-cooled branch pipes 213 are snapped into the housing 11. A coolant circulation structure is formed by the connection of the first manifold 211, the second manifold 212, and the plurality of first liquid-cooled branch pipes 213. The coolant in the first liquid-cooled support 21 can contact the housing 11 in multiple directions for heat exchange, thereby improving the cooling efficiency. The first liquid cooling branch pipes 213 are spaced apart along the first direction X, which helps to achieve a more uniform heat distribution and heat dissipation effect. Adjacent first liquid cooling branch pipes 213, first manifold 211 and second manifold 212 form a first positioning port 25, which helps to accurately position them with the housing 11. The first liquid cooling branch pipes 213 are snapped into the housing 11, so that the first liquid cooling branch pipes 213 can fit snugly against the housing 11, shortening the distance between the coolant and the heat source, thereby improving cooling efficiency.
[0058] In one embodiment, the first liquid cooling branch pipe 213 is disposed in the limiting port 1113. The first liquid cooling branch pipe 213 can fit tightly with the shell 11, shortening the distance between the coolant and the heat source, thereby improving the cooling efficiency.
[0059] Furthermore, such as Figure 6 as well as Figure 8 As shown, the liquid cooling assembly 2 also includes a second liquid cooling bracket 22, a first liquid cooling pipe 26, a second liquid cooling pipe 27, and a third liquid cooling pipe 28. The second liquid cooling bracket 22 is snapped onto the end of the housing 11 away from the first liquid cooling bracket 21 in the second direction Y. The first liquid cooling pipe 26 and the second liquid cooling pipe 27 are respectively connected to the third liquid cooling pipe 28. The first liquid cooling bracket 21 is connected to the first liquid cooling pipe 26, and the second liquid cooling bracket 22 is connected to the second liquid cooling pipe 27. The first liquid cooling pipe 26 is connected to the first liquid cooling bracket 21, and one end of the first liquid cooling pipe 26 is connected to the third liquid cooling pipe 28. The second liquid cooling pipe 27 is connected to the second liquid cooling bracket 22, and the other end of the second liquid cooling pipe 27 is connected to the third liquid cooling pipe 28. The coolant in the first liquid cooling bracket 21 and the second liquid cooling bracket 22 is injected or discharged through the third liquid cooling pipe 28. The first liquid-cooled support 21, the second liquid-cooled support 22, the first liquid-cooled pipe 26, the second liquid-cooled pipe 27 and the third liquid-cooled pipe 28 are connected and assembled into a whole, which can provide higher structural strength and stability.
[0060] In one embodiment, the housing 11 has a limiting port 1113 at the end away from the first liquid cooling bracket 21 in the second direction Y. The second liquid cooling bracket 22 is engaged with the limiting port 1113. The housing 11 supports the second liquid cooling bracket 22, thereby improving the connection stability between the second liquid cooling bracket 22 and the housing 11.
[0061] As one embodiment, such as Figure 4 As shown, the first liquid-cooled support 21 and the second liquid-cooled support 22 are respectively provided with liquid inlet and liquid outlet. The liquid inlets of the first liquid-cooled support 21 and the second liquid-cooled support 22 are located at the same end in the third direction Z, and the liquid outlets of the first liquid-cooled support 21 and the second liquid-cooled support 22 are located at the same end in the third direction Z. The first liquid-cooled pipe 26 and the second liquid-cooled pipe 27 are respectively connected to the third liquid-cooled pipe 28 to form a collecting assembly. There are two collecting assemblies. In one of the collecting assemblies, the first liquid-cooled pipe 26 is connected to the liquid inlet of the first liquid-cooled support 21, and the second liquid-cooled pipe 27 is connected to the liquid outlet of the first liquid-cooled support 21. The liquid cooling pipe 27 is connected to the liquid inlet of the second liquid cooling bracket 22; the first liquid cooling pipe 26 of the other collecting component is connected to the liquid outlet of the first liquid cooling bracket 21, and the second liquid cooling pipe 27 is connected to the liquid outlet of the second liquid cooling bracket 22. Thus, coolant is injected into the first liquid cooling bracket 21 and the second liquid cooling bracket 22 through one collecting component, and coolant is discharged from the first liquid cooling bracket 21 and the second liquid cooling bracket 22 through the other collecting component, thereby realizing the circulation of coolant between the first liquid cooling bracket 21 and the second liquid cooling bracket 22.
[0062] As one embodiment, such as Figure 6 as well as Figure 8As shown, the second liquid-cooled support 22 includes a third manifold 221, a fourth manifold 222, and multiple second liquid-cooled branch pipes 223. The third manifold 221 and the fourth manifold 222 extend along a first direction X, and the multiple second liquid-cooled branch pipes 223 extend along a third direction Z and are spaced apart along the first direction X. The multiple second liquid-cooled branch pipes 223 are connected to the third manifold 221 and the fourth manifold 222 at their respective ends in the third direction Z. Adjacent second liquid-cooled branch pipes 223, the third manifold 221, and the fourth manifold 222 enclose a first positioning port 25, and the second liquid-cooled branch pipes 223 are engaged with the limiting port 1113. A coolant circulation structure is formed by the connection of the third manifold 221, the fourth manifold 222, and the multiple second liquid-cooled branch pipes 223. The coolant in the second liquid-cooled support 22 can contact the shell 11 in multiple directions for heat exchange, improving the cooling efficiency. The second liquid cooling branch pipes 223 are spaced apart along the first direction X, which helps to achieve a more uniform heat distribution and heat dissipation effect. Adjacent second liquid cooling branch pipes 223, third manifold 221, and fourth manifold 222 enclose and form a first positioning port 25, which helps to accurately position them with the housing 11. The second liquid cooling branch pipes 223 are located within the limiting port 1113, and the second liquid cooling branch pipes 223 can fit tightly against the housing 11, shortening the distance between the coolant and the heat source, thereby improving cooling efficiency.
[0063] As one embodiment, such as Figure 10 As shown, the battery pack also includes a thermally conductive structural adhesive layer 3, and the first liquid-cooled bracket 21 is connected to the housing 11 through the thermally conductive structural adhesive layer 3. The first liquid-cooled bracket 21 has multiple first positioning holes 25 in the first direction X, and each first positioning hole 25 is respectively provided with a battery cell 1. The multiple battery cells 1 are fixed to the first liquid-cooled bracket 21 by bonding with the thermally conductive structural adhesive layer 3, thereby improving the stability of the assembly structure of the multiple battery cells 1 and the first liquid-cooled bracket 21. At the same time, the thermally conductive structural adhesive layer 3 has a high thermal conductivity, which can quickly conduct heat to the first liquid-cooled bracket 21, preventing the battery cells 1 from being damaged by high temperature during use.
[0064] As one embodiment, such as Figure 6 as well as Figure 11 As shown, the second liquid cooling bracket 22 has the same structure as the first liquid cooling bracket 21, which facilitates production and assembly and improves production efficiency.
[0065] As one embodiment, such as Figure 6 as well as Figure 11As shown, the second liquid-cooled bracket 22 is connected to the housing 11 via a thermally conductive adhesive layer 3. Multiple housings 11 are bonded to the first liquid-cooled bracket 21 at one end in the second direction Y via the thermally conductive adhesive layer 3, and the other end is inserted into the first positioning port 25 of the second liquid-cooled bracket 22 and bonded to the second liquid-cooled bracket 22 via the thermally conductive adhesive layer 3, thereby fixing the housing 11 at the other end in the second direction Y. The first liquid-cooled bracket 21 and the second liquid-cooled bracket 22 respectively fix the installation positions of multiple battery cells 1, while simultaneously cooling the multiple battery cells 1. This eliminates the need for a load-bearing structure for the battery cell 1 module, reduces production costs, and improves the overall mechanical strength of the battery pack.
[0066] Furthermore, such as Figures 5 to 8 As shown, the first liquid-cooled branch pipe 213 has a first liquid-cooled surface 2131, which faces the first positioning port 25 and is connected to the connecting part 1112. The connection and contact between the first liquid-cooled surface 2131 and the connecting part 1112 shortens the heat transfer distance between the connecting part 1112 and the first liquid-cooled branch pipe 213, thereby improving the cooling efficiency.
[0067] Furthermore, such as Figure 5 As shown, the expansion section 1111 includes a first expansion surface 11111 and a second expansion surface 11112. The second expansion surface 11112 is connected to the connecting section 1112 at both ends of the second direction Y via the first expansion surface 11111. The first liquid-cooled branch pipe 213 has a second liquid-cooled surface 2132, which is located at one end of the first positioning port 25 in the second direction Y. The second liquid-cooled surface 2132 is connected to the first expansion surface 11111. The connection and contact between the second liquid-cooled surface 2132 and the first expansion surface 11111 shortens the heat transfer distance between the first expansion surface 11111 and the first liquid-cooled branch pipe 213, thereby improving the cooling efficiency.
[0068] As one embodiment, such as Figure 5 As shown, the second liquid cooling branch pipe 223 has a second liquid cooling surface 2132, which is connected to and in contact with the first expansion surface 11111, thereby shortening the heat transfer distance between the first expansion surface 11111 and the second liquid cooling branch pipe 223 and improving the cooling efficiency.
[0069] As one embodiment, such as Figure 11 As shown, the battery pack also includes a heat spreader 4. One end of the heat spreader 4 in the second direction Y is connected to the first liquid cooling branch pipe 213, and one side wall of the heat spreader 4 in the first direction X is connected and attached to the second expansion surface 11112. The heat spreader 4 is fixed by being connected to the first liquid cooling branch pipe 213. The heat spreader 4 performs uniform temperature thermal management of the battery cell 1 through the second expansion surface 11112, thereby improving the thermal management efficiency of the battery cell 1 and strengthening the overall mechanical structure of the battery pack.
[0070] As one embodiment, such as Figure 11 As shown, the second liquid cooling branch pipe 223 is connected to a heat spreader plate 4. The heat spreader plate 4 is fixed by being connected to the second liquid cooling branch pipe 223. The heat spreader plate 4 performs uniform temperature thermal management on the casing 11 through the second expansion surface 11112, which improves the thermal management efficiency of the cell 1 and strengthens the overall mechanical structure of the battery pack.
[0071] As one embodiment, such as Figure 11 As shown, the heat spreader 4 is connected to the shell 11 through the thermally conductive adhesive layer 3, which improves the connection stability of the heat spreader 4.
[0072] As one embodiment, such as Figure 10 As shown, the battery pack also includes an insulating heat-insulating pad 5, which is attached to the second expansion surface 11112 on one side wall in the first direction X. The insulating heat-insulating pad 5 effectively isolates heat transfer between the battery cells 1, reduces the incidence of heat diffusion in the battery pack, and improves the safety performance of the battery pack.
[0073] As one embodiment, such as Figure 10 As shown, the insulating heat insulation pad 5 is fixed to the first sidewall 111 by the thermally conductive structural adhesive layer 3 to achieve the fixation of the insulating heat insulation pad 5. The insulating heat insulation pad 5, the first liquid cooling bracket 21, and the second liquid cooling bracket 22 are respectively bonded to the shell 11 by the thermally conductive structural adhesive layer 3, firmly bonding the insulating heat insulation pad 5, the first liquid cooling bracket 21, and the second liquid cooling bracket 22 to the shell 11 to form a stable and reliable structure, enhancing the shock resistance and impact resistance of the entire system. This simplifies the production process and reduces production costs. The thermally conductive structural adhesive layer 3 cures quickly, completing the bonding process in a short time, which helps to accelerate the production progress and improve production efficiency.
[0074] Furthermore, such as Figures 6 to 8 As shown, the first manifold 211 is provided with a third liquid cooling surface 2111, which faces the first positioning port 25. The housing 11 has a first end face 113 at one end in the third direction Z, and the third liquid cooling surface 2111 is in close contact with the first end face 113. The connection and contact between the third liquid cooling surface 2111 and the first end face 113 shortens the heat transfer distance between the housing 11 at one end in the third direction Z and the first manifold 211, thereby improving the cooling efficiency.
[0075] As one embodiment, such as Figures 6 to 8 As shown, the third manifold 221 is provided with a third liquid cooling surface 2111, which is connected to and attached to the first end face 113, thereby shortening the heat transfer distance between the housing 11 at the third Z-end and the third manifold 221 and improving the cooling efficiency.
[0076] Furthermore, such as Figures 6 to 8As shown, the second manifold 212 is provided with a fourth liquid-cooled surface 2121, which faces the first positioning port 25. The housing 11 has a second end face 114 at one end in the third direction Z, and the fourth liquid-cooled surface 2121 is in contact with the second end face 114. The connection and contact between the fourth liquid-cooled surface 2121 and the second end face 114 shortens the heat transfer distance between the housing 11 at one end in the third direction Z and the second manifold 212, thereby improving the cooling efficiency.
[0077] As one embodiment, such as Figures 6 to 8 As shown, the fourth manifold 222 is provided with a fourth liquid cooling surface 2121, which is connected to and attached to the second end face 114, thereby shortening the heat transfer distance between the housing 11 at the third direction Z end and the fourth manifold 222 and improving the cooling efficiency.
[0078] As one embodiment, such as Figures 6 to 8 As shown, the first liquid-cooled bracket 21 has multiple first positioning ports 25 spaced apart along the first direction X. Multiple battery cells 1 are provided, and each first positioning port 25 is connected to a corresponding battery cell 1. The openings of the limiting ports 1113 of adjacent battery cells 1 are arranged opposite to each other, defining a limiting groove 1114. The first liquid-cooled branch pipe 213 is disposed in the limiting groove 1114. Two surfaces of the first liquid-cooled branch pipe 213 in the first direction X are respectively in contact with the housing 11 of adjacent battery cells 1. The first liquid-cooled branch pipe 213 can simultaneously cool two battery cells 1, improving cooling efficiency. The limiting ports 1113 with opposite openings define the limiting groove 1114, within which the first liquid-cooled branch pipe 213 is accommodated, making reasonable use of the space in the housing 11 and optimizing the overall layout within the battery pack.
[0079] As one embodiment, such as Figures 6 to 8 As shown, the second liquid-cooled bracket 22 has multiple first positioning ports 25 spaced apart along the first direction X. The first positioning ports 25 of the first liquid-cooled bracket 21 and the first positioning ports 25 of the second liquid-cooled bracket 22 are positioned correspondingly in the first direction X. The second liquid-cooled branch pipe 223 is disposed in the limiting groove 1114. The two surfaces of the second liquid-cooled branch pipe 223 in the first direction X are respectively in contact with the housing 11 of the adjacent battery cell 1. The second liquid-cooled branch pipe 223 can cool two battery cells 1 simultaneously, improving cooling efficiency. The limiting ports 1113 with opposite openings define the limiting groove 1114. The second liquid-cooled branch pipe 223 is accommodated in the limiting groove 1114, making reasonable use of the space in the housing 11 and optimizing the overall layout inside the battery pack. The first liquid-cooled bracket 21 and the second liquid-cooled bracket 22 limit the housing 11 at both ends in the second direction Y through the first positioning ports 25, improving the structural stability of the assembly of the first liquid-cooled bracket 21 and the second liquid-cooled bracket 22 with the housing 11.
[0080] As one embodiment, such as Figure 4As shown, the battery pack also includes a housing 6, which has a receiving cavity 61 and a liquid cooling port 62. The liquid cooling port 62 is connected to the receiving cavity 61. The liquid cooling assembly 2 and the battery cell 1 are respectively disposed in the receiving cavity 61, and the first manifold 211 and the second manifold 212 are respectively disposed in the liquid cooling port 62. The receiving cavity 61 provides a receiving space for the battery cell 1 and the liquid cooling assembly 2, and the coolant in the first liquid cooling bracket 21 is injected or discharged through the liquid cooling port 62.
[0081] As one embodiment, such as Figure 1 As shown, there are two liquid cooling ports 62. The first manifold 211 is connected to one of the liquid cooling ports 62 as the inlet of the coolant, and the second manifold 212 is connected to the other liquid cooling port 62 as the outlet of the coolant. The coolant is injected into the first liquid cooling bracket 21 through the inlet and discharged from the first liquid cooling bracket 21 through the outlet, so as to realize the circulation of the coolant in the first liquid cooling bracket 21.
[0082] In summary, this utility model embodiment provides a battery pack and its electrical equipment. The first sidewall 111 of the housing 11 includes an expansion portion 1111 and a connecting portion 1112. The expansion portion 1111 protrudes from the connecting portion 1112 in a direction away from the electrode core 12. An expansion groove 1115 is formed between the electrode core 12 and the expansion portion 1111 in the first direction X. The battery cell 1 itself integrates the expansion space of the electrode core 12, reducing the material used in the expansion modules between battery cells 1, optimizing the overall layout space of the battery pack, and achieving a lightweight battery pack. One end of the housing 11 is inserted into the first positioning port 25 of the liquid cooling assembly 2 in the second direction Y to fix the end of the housing 11. The liquid cooling assembly 2 is snapped onto the housing 11 to limit the assembly position of the liquid cooling assembly 2. The assembly of the liquid cooling assembly 2 and the battery cell 1 achieves fixation of the battery cell 1, saving on the development of support materials for the battery cell 1 module, improving the overall mechanical strength of the battery pack, and simultaneously improving the thermal management efficiency of the battery cell 1.
[0083] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.
Claims
1. A battery pack having intersecting first directions (X), second directions (Y), and third directions (Z), characterized in that: It includes a battery cell (1) and a liquid cooling assembly (2), wherein the battery cell (1) includes a housing (11) and an electrode core (12); The housing (11) includes two first sidewalls (111) arranged opposite to each other along the first direction (X) and two second sidewalls (112) arranged opposite to each other along the second direction (Y). The first sidewalls (111) and the second sidewalls (112) enclose to form a core cavity (1117), and the core (12) is housed in the core cavity (1117). The first sidewall (111) includes an expansion portion (1111) and a connecting portion (1112). The expansion portion (1111) is connected to the second sidewall (112) on both sides of the second direction (Y) through the connecting portion (1112). The expansion portion (1111) protrudes from the connecting portion (1112) in a direction away from the pole core (12). The expansion portion (1111) has an expansion groove (1115) on the side facing the pole core (12). The liquid cooling assembly (2) is provided with a first positioning port (25), and the housing (11) is inserted into the first positioning port (25) at one end in the second direction (Y), and the liquid cooling assembly (2) is engaged with the housing (11).
2. The battery pack according to claim 1, characterized in that: The projected area of the expansion portion (1111) on the plane perpendicular to the first direction (X) is c mm², and the projected area of the connecting portion (1112) on the plane perpendicular to the first direction (X) is d mm², where c > d.
3. The battery pack according to claim 2, characterized in that: The area of the second sidewall (112) is smaller than the area of the first sidewall (111).
4. The battery pack according to claim 1, characterized in that: The liquid cooling assembly (2) includes a first liquid cooling bracket (21), which is snapped into the housing (11) at one end in the second direction (Y).
5. The battery pack according to claim 4, characterized in that: The housing (11) is respectively attached to the first liquid cooling bracket (21) at both ends in the first direction (X).
6. The battery pack according to claim 4, characterized in that: The first liquid-cooled bracket (21) includes a first manifold (211), a second manifold (212), and a plurality of first liquid-cooled branch pipes (213). The first manifold (211) and the second manifold (212) extend along the first direction (X), and the plurality of first liquid-cooled branch pipes (213) extend along the third direction (Z) and are spaced apart along the first direction (X). The plurality of first liquid-cooled branch pipes (213) are connected to the first manifold (211) and the second manifold (212) at both ends of the third direction (Z), respectively. Adjacent first liquid-cooled branch pipes (213), first manifold (211), and second manifold (212) enclose to form the first positioning port (25). The first liquid-cooled branch pipes (213) are snapped into the housing (11).
7. The battery pack according to claim 4, characterized in that: The liquid cooling assembly (2) further includes a second liquid cooling bracket (22), a first liquid cooling pipe (26), a second liquid cooling pipe (27), and a third liquid cooling pipe (28). The second liquid cooling bracket (22) is snapped onto the end of the housing (11) away from the first liquid cooling bracket (21) in the second direction (Y). The first liquid cooling pipe (26) and the second liquid cooling pipe (27) are respectively connected to the third liquid cooling pipe (28). The first liquid cooling bracket (21) is connected to the first liquid cooling pipe (26), and the second liquid cooling bracket (22) is connected to the second liquid cooling pipe (27).
8. The battery pack according to claim 6, characterized in that: The first liquid-cooled branch pipe (213) has a first liquid-cooled surface (2131), which faces the first positioning port (25) and is connected to the connecting part (1112).
9. The battery pack according to claim 6, characterized in that: The expansion section (1111) includes a first expansion surface (11111) and a second expansion surface (11112). The second expansion surface (11112) is connected to the connecting section (1112) at both ends of the second direction (Y) through the first expansion surface (11111). The first liquid cooling branch pipe (213) has a second liquid cooling surface (2132). The second liquid cooling surface (2132) is located at one end of the first positioning port (25) in the second direction (Y). The second liquid cooling surface (2132) is connected to the first expansion surface (11111).
10. The battery pack according to claim 6, characterized in that: The first manifold (211) is provided with a third liquid cooling surface (2111), the third liquid cooling surface (2111) faces the first positioning port (25), and the housing (11) has a first end face (113) at one end in the third direction (Z), the third liquid cooling surface (2111) is in contact with the first end face (113).
11. The battery pack according to claim 6, characterized in that: The second manifold (212) is provided with a fourth liquid cooling surface (2121), which faces the first positioning port (25). The housing (11) has a second end face (114) at one end in the third direction (Z), and the fourth liquid cooling surface (2121) is in contact with the second end face (114).
12. An electrical appliance, characterized in that: Includes the battery pack as described in any one of claims 1-11.