Battery box body, battery pack and electric equipment

Abstract

The utility model provides a battery box body, a battery pack and electric equipment, and relates to the technical field of batteries, the battery box body comprises a liquid cooling bottom plate and a side wall assembly, the side wall assembly is arranged on the peripheral side of the liquid cooling bottom plate in a surrounding manner, and the side wall assembly is connected to the liquid cooling bottom plate; the side, deviating from the side wall assembly, of the liquid cooling bottom plate is provided with a flow channel, and the side, facing the side wall assembly, of the liquid cooling bottom plate is provided with a glue overflowing groove used for containing adhesive glue. According to the battery box body provided by the invention, the heat exchange performance and the structural strength of the battery pack are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery box, a battery pack and an electrical device. Background Art

[0002] In the automotive industry, new energy vehicles are playing an increasingly important role. Among them, power batteries, as the main power source of new energy vehicles, are of great importance to them.

[0003] Power batteries include a liquid cooling plate and several battery cells. The battery cells tend to generate heat during operation, which in turn causes heat accumulation and increases in the battery cell temperature. The liquid cooling plate has a flow channel inside for the flow of a cooling medium. The circulating cooling medium removes the heat from the battery cells, thereby cooling the battery cells and improving the safety of the power battery. In related technologies, to fully utilize the space in power batteries, a module-free structure design is currently mainly adopted. That is, after connecting several battery cells into a battery cell group, the battery cells are connected to the liquid cooling plate by bonding. However, this will result in a large gap between the battery cells and the liquid cooling plate, resulting in poor contact between the battery cells and the liquid cooling plate, thereby reducing the heat dissipation effect of the battery cells. Utility Model Content

[0004] Based on this, the present application provides a battery box, a battery pack and an electrical device, in which the contact between the liquid-cooled base plate and the battery cells is good, thereby improving the heat exchange effect of the battery pack.

[0005] In a first aspect, the present application provides a battery box, comprising a liquid-cooled bottom plate and a side enclosure assembly, wherein the side enclosure assembly is disposed around the periphery of the liquid-cooled bottom plate and is connected to the liquid-cooled bottom plate;

[0006] The side of the liquid cooling base plate facing away from the side panel assembly is provided with a flow channel, and the side of the liquid cooling base plate facing the side panel assembly is provided with a glue overflow groove for accommodating adhesive.

[0007] In a possible implementation, the glue overflow groove extends along at least one of a first direction and a second direction;

[0008] The first direction and the second direction are arranged at an angle.

[0009] In a possible implementation, at least two glue overflow grooves are evenly spaced apart along the first direction;

[0010] And / or, at least two glue overflow grooves are evenly spaced apart along the second direction.

[0011] In a possible implementation, the cross-sectional shape of the glue overflow groove includes at least one of a rectangle and a semicircle.

[0012] In a possible implementation, the side panel assembly includes four side panels, which are connected end to end in sequence along the circumference of the liquid-cooled bottom plate, and both ends of the glue overflow groove extend to the two side panels respectively.

[0013] In a possible implementation, the liquid cooling base plate includes an upper plate and a lower plate, and the glue overflow groove is located on a side of the upper plate facing away from the lower plate;

[0014] A flow channel groove is provided on one side of the lower plate facing the upper plate, and the upper plate is connected to the lower plate to jointly define a flow channel.

[0015] In a second aspect, the present application provides a battery pack, comprising a cell assembly and the battery case provided in the first aspect, wherein the cell assembly is disposed in the battery case.

[0016] In one possible implementation, the battery cell assembly includes at least two battery cells, the at least two battery cells are arranged in an array, and the at least two glue overflow grooves are arranged at intervals along the arrangement direction of the battery cells;

[0017] At least one glue overflow groove is located between two adjacent battery cells, and / or at least one glue overflow groove is located between two side surfaces of the same battery cell.

[0018] In a possible implementation, the battery pack further includes adhesive glue, which is located in the glue overflow groove and connects the battery cell and the liquid cooling base plate.

[0019] In a third aspect, the present application provides an electrical device, comprising an electrical device and the battery pack provided in the second aspect above, wherein the battery pack is used to supply power to the electrical device.

[0020] The present application provides a battery case, a battery pack and an electrical device, wherein the battery case includes a liquid-cooled base plate and a side panel assembly, and the liquid-cooled base plate includes a flow channel and an overflow glue groove. A flow channel is provided for circulating a heat exchange medium, so that the liquid-cooled base plate and the battery cell assembly can exchange heat, thereby cooling or heating the battery cell assembly. An overflow glue groove is provided for accommodating adhesive so that after the battery cell assembly and the liquid-cooled base plate are bonded, the overflow glue groove will not protrude from the liquid-cooled base plate, thereby preventing the adhesive from reducing the flatness of the liquid-cooled base plate, thereby improving the degree of fit between the liquid-cooled base plate and the battery cell assembly, thereby improving the heat conduction effect between the liquid-cooled base plate and the battery cell assembly, and the overflow glue groove can make the adhesive more evenly distributed between the liquid-cooled base plate and the battery cell assembly, thereby improving the bonding strength between the liquid-cooled base plate and the battery cell assembly. Therefore, the battery case provided by the present application improves the heat exchange performance and structural strength of the battery pack.

[0021] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the battery case, battery pack, and electrical equipment provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of the battery box provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of the liquid cooling base plate in the battery box provided in an embodiment of the present application;

[0026] Figure 4 for Figure 3 A partial enlarged view of the middle part;

[0027] Figure 5 for Figure 1 A top view of

[0028] Figure 6 for Figure 5 BB section view;

[0029] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0030] Figure 8 for Figure 5 DD section view.

[0031] Description of reference numerals:

[0032] 10-battery box;

[0033] 100-liquid cooling base plate; 110-flow channel; 120-overflow trough; 130-upper plate; 140-lower plate;

[0034] 200-side panel assembly; 210-side panel;

[0035] 20-battery cell assembly;

[0036] 201-battery cell. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0039] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0040] The terms "first," "second," and "third" (if any) in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the application described herein can, for example, be implemented in orders other than those illustrated or described herein.

[0041] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0042] Power batteries include a liquid cooling plate and several battery cells. The battery cells tend to generate heat during operation, which in turn causes heat accumulation and increases in the battery cell temperature. The liquid cooling plate has a flow channel inside for the flow of a cooling medium. The circulating cooling medium removes the heat from the battery cells, thereby cooling the battery cells and improving the safety of the power battery. In related technologies, to fully utilize the space in power batteries, a module-free structure design is currently mainly adopted. That is, after connecting several battery cells into a battery cell group, the battery cells are connected to the liquid cooling plate by bonding. However, this will result in a large gap between the battery cells and the liquid cooling plate, resulting in poor contact between the battery cells and the liquid cooling plate, thereby reducing the heat dissipation effect of the battery cells.

[0043] In view of this, the embodiments of the present application provide a battery case, a battery pack, and an electrical device. The battery case includes a liquid-cooled base plate and a side panel assembly. The liquid-cooled base plate and the side panel assembly together form a battery case for accommodating the battery cell assembly, and the battery case then supports and protects the battery cell assembly. A glue overflow groove is provided on the side of the liquid-cooled base plate facing the side panel assembly. The glue overflow groove is used to accommodate adhesive. In this way, the adhesive can be evenly distributed between the liquid-cooled base plate and the battery cell assembly, thereby improving the bonding strength between the liquid-cooled base plate and the battery cell assembly. In addition, the adhesive will not increase the gap between the liquid-cooled base plate and the battery cell assembly, and the liquid-cooled base plate and the battery cell assembly are more closely fitted, thereby improving the thermal conductivity between the liquid-cooled base plate and the battery cell assembly, thereby improving the safety of the battery pack.

[0044] The specific implementations of the battery box, battery pack, and electrical equipment provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0045] Reference Figure 1 As shown, an embodiment of the present application provides an electric device, which may include a battery pack and an electric device, and the battery pack is used to supply power to the electric device.

[0046] For example, the electrical equipment may be a vehicle, the electrical device may be an electric motor, and the battery pack may provide electrical energy to the electric motor, thereby enabling the electric motor to drive the vehicle.

[0047] Among them, the vehicle can be a new energy vehicle (New Energy Vehicle), such as a pure electric vehicle (Pure Electric Vehicle / Battery Electric Vehicle; abbreviated as: PEV / BEV), a range extended electric vehicle (Range Extended Electric Vehicle; abbreviated as: REEV), a hybrid electric vehicle (Hybrid Electric Vehicle; abbreviated as: HEV), a fuel cell electric vehicle). The vehicle can also be any vehicle with a battery pack, which is not specifically limited in the embodiments of the present application.

[0048] Reference Figure 1 and Figure 2 As shown, based on the above embodiment, the embodiment of the present application further provides a battery pack, which may include a battery case 10 and a battery cell assembly 20, wherein the battery cell assembly 20 is disposed in the battery case 10. The battery case 10 may include a liquid-cooled base plate 100 and a side enclosure assembly 200, wherein the side enclosure assembly 200 is disposed around the liquid-cooled base plate 100 and is connected to the liquid-cooled base plate 100. The liquid-cooled base plate 100 has a flow channel 110 on a side facing away from the side enclosure assembly 200, and has a glue overflow groove 120 on a side facing the side enclosure assembly 200, and the glue overflow groove 120 is used to accommodate adhesive.

[0049] The cell assembly 20 is used to generate current, and the battery case 10 is used to carry, support, and protect the cell assembly 20 to ensure that the cell assembly 20 can be charged and discharged normally. Currently, with the application of module-free structures (different from battery modules, the cell assembly 20 is directly installed in the battery case 10), the cell assembly 20 and the battery case 10 are mainly connected by bonding, and then the cell assembly 20 is fixed in the battery case 10. This helps to fully utilize the space in the battery pack and strengthen the integrity of the battery pack.

[0050] In a specific implementation, the battery box 10 may include a liquid cooling base plate 100 and a side panel assembly 200. After the liquid cooling base plate 100 and the side panel assembly 200 are connected, a receiving cavity is defined in the battery box 10. The receiving cavity can be used to accommodate the battery cell assembly 20. The liquid cooling base plate 100 plays the role of cooling the battery cell assembly 20. In addition, the liquid cooling base plate 100 also plays the role of supporting the battery cell assembly 20. After the battery cell assembly 20 is bonded to the liquid cooling base plate 100, it can be The cell assembly 20 is fixed within the battery case 10. Furthermore, since the liquid-cooling base plate 100 is provided with an overflow glue groove 120, the adhesive used to bond the liquid-cooling base plate 100 and the cell assembly 20 can be disposed within the overflow glue groove 120 without protruding beyond the overflow glue groove 120. This improves the flatness of the liquid-cooling base plate 100, thereby allowing for a closer fit between the liquid-cooling base plate 100 and the cell assembly 20, thereby enhancing thermal conductivity between the liquid-cooling base plate 100 and the cell assembly 20. The side panel assembly 200 serves as a buffer, heat insulator, and position limiter. Thus, the battery case 10 formed by connecting the liquid-cooling base plate 100 and the side panel assembly 200 can integrate multiple cells 201 together, thereby forming a battery pack with a relatively high voltage.

[0051] Reference Figures 2 to 4 As shown, based on the above embodiment, the embodiment of the present application further provides a battery case 10, which includes a liquid-cooled base plate 100 and a side enclosure assembly 200. The side enclosure assembly 200 is disposed around the liquid-cooled base plate 100 and is connected to the liquid-cooled base plate 100. The liquid-cooled base plate 100 has a flow channel 110 on the side facing away from the side enclosure assembly 200, and has a glue overflow groove 120 on the side facing the side enclosure assembly 200. The glue overflow groove 120 is used to accommodate adhesive.

[0052] In the present application, the battery case 10 is used to install the battery cell assembly 20. The battery case 10 may include a liquid-cooling base plate 100 and a side panel assembly 200. The liquid-cooling base plate 100 can fix the bottom of the battery cell assembly 20 and can be in contact with the battery cell assembly 20 to generate heat exchange between the two. When the temperature of the battery cell assembly 20 is high, the liquid-cooling base plate 100 cools the battery cell assembly 20, or when the temperature of the battery cell assembly 20 is low, the liquid-cooling assembly heats the battery cell assembly 20. The side panel assembly 200 is arranged around the circumference of the liquid-cooling base plate 100. The side panel assembly 200 and the liquid-cooling base plate 100 can be welded together, so that the side panel assembly 200 and the liquid-cooling base plate 100 are assembled into a whole, so that the battery case 10 carries, supports, cushions, and isolates the battery cell assembly 20.

[0053] Because the heat exchange medium needs to circulate within the liquid-cooled base plate 100, the liquid-cooled base plate 100 is provided with a flow channel 110. The flow channel 110 is located on the side of the liquid-cooled base plate 100 facing away from the side panel assembly 200, that is, the flow channel 110 is located on the side of the liquid-cooled base plate 100 facing away from the battery cell assembly 20. Thus, when the battery cell assembly 20 comes into contact with the side of the liquid-cooled base plate 100 close to the battery cell assembly 20, heat is always transferred from a higher temperature object to a lower temperature object. Therefore, heat can be exchanged between the battery cell assembly 20 and the heat exchange medium. Heat from the battery cell assembly 20 can be transferred to the heat exchange medium, which then carries away the heat, thereby cooling the battery cell assembly 20. Alternatively, heat from the heat exchange medium can be transferred to the battery cell assembly 20, thereby heating the battery cell assembly 20.

[0054] Because in the module-free structure, the battery cell assembly 20 needs to be connected to the liquid cooling base plate 100 through adhesive glue. In the related art, the liquid cooling base plate 100 has a flat surface facing the battery cell assembly 20. After gluing, the adhesive protrudes from the liquid cooling base plate 100, thereby increasing the gap between the liquid cooling base plate 100 and the battery cell assembly 20.

[0055] In order to prevent the adhesive from reducing the flatness of the liquid-cooled base plate 100, a glue overflow groove 120 is provided on the side of the liquid-cooled base plate 100 facing the side panel assembly 200 in the embodiment of the present application. That is, the glue overflow groove 120 is located on the side of the liquid-cooled base plate 100 facing the battery cell assembly 20. In this way, when the battery cell assembly 20 is bonded to the liquid-cooled base plate 100, the adhesive can be first injected into the glue overflow groove 120, and then the adhesive can be squeezed by the bottom surface of the battery cell assembly 20 to force the adhesive to flow, thereby making the adhesive fill the glue overflow groove 120 without protruding from the surface of the liquid-cooled base plate 100 facing the battery cell assembly 20, thereby reducing the gap between the liquid-cooled base plate 100 and the battery cell assembly 20, thereby improving the heat exchange effect between the battery cell assembly 20 and the liquid-cooled base plate 100.

[0056] In addition, since the liquid-cooled base plate 100 is provided with a glue overflow groove 120, the glue application position can be standardized when applying glue to avoid random gluing resulting in uneven distribution of the adhesive. Therefore, by providing the glue overflow groove 120, the adhesive can be more evenly distributed on the side of the liquid-cooled base plate 100 facing the side panel assembly 200, thereby improving the bonding performance between the battery cell assembly 20 and the liquid-cooled base plate 100.

[0057] It should be noted that the battery pack provided in the embodiment of the present application can be in the form of CTB (Cell To Body) or CTP (Cell To Pack). That is, when the battery pack is in the form of CTP, the battery case 10 can also include an upper cover, which is sealed and connected to the side panel assembly 200, thereby encapsulating the battery cell assembly 20 in the battery case 10. When the battery pack is in the form of CTB, the battery case 10 can be provided with no separate upper cover, but the upper cover and the vehicle body floor can be combined into one. The embodiment of the present application does not impose any specific restrictions on this.

[0058] The battery case 10 provided in the embodiment of the present application includes a liquid-cooling base plate 100 and a side panel assembly 200 . The liquid-cooling base plate 100 includes a flow channel 110 and a glue overflow groove 120 . By providing a flow channel 110 for circulating a heat exchange medium, heat is exchanged between the liquid-cooled base plate 100 and the battery cell assembly 20, thereby cooling or heating the battery cell assembly 20. By providing a glue overflow groove 120 for accommodating adhesive, after the battery cell assembly 20 and the liquid-cooled base plate 100 are bonded, the glue overflow groove 120 does not protrude from the liquid-cooled base plate 100, thereby preventing the adhesive from reducing the flatness of the liquid-cooled base plate 100, thereby improving the degree of fit between the liquid-cooled base plate 100 and the battery cell assembly 20, thereby improving the thermal conductivity between the liquid-cooled base plate 100 and the battery cell assembly 20. In addition, the glue overflow groove 120 can make the adhesive more evenly distributed between the liquid-cooled base plate 100 and the battery cell assembly 20, thereby improving the bonding strength between the liquid-cooled base plate 100 and the battery cell assembly 20. Therefore, the battery case 10 provided in the embodiment of the present application improves the heat exchange performance and structural strength of the battery pack.

[0059] Reference Figures 4 to 8 As shown in a possible implementation, the glue overflow groove 120 extends along at least one of the first direction and the second direction. The first direction and the second direction are set at an angle. The first direction can be consistent with the length direction of the liquid cooling base plate 100, and the second direction can be consistent with the width direction of the liquid cooling base plate 100. Specifically, the first direction can be referred to Figure 5 and Figure 8 The X direction in the second direction can refer to Figure 5 and Figure 7 in the Y direction.

[0060] That is to say, the glue overflow groove 120 can extend only along the first direction to form a long strip of glue overflow groove 120, or the glue overflow groove 120 can extend only along the second direction to form a long strip of glue overflow groove 120, or the glue overflow groove 120 can extend along the first direction and the second direction at the same time to form a grid-shaped glue overflow groove 120.

[0061] In this way, it is convenient to process the glue overflow groove 120 on the side of the liquid cooling base plate 100 facing the side panel assembly 200 according to different setting requirements and manufacturing processes, which is conducive to forming evenly distributed glue overflow grooves 120 on the liquid cooling base plate 100.

[0062] In some embodiments, at least two glue overflow grooves 120 are evenly spaced apart along the first direction, and / or at least two glue overflow grooves 120 are evenly spaced apart along the second direction.

[0063] It is understandable that in the above-mentioned arrangement, at least two overflow glue grooves 120 may be evenly spaced along the first direction, thereby forming evenly distributed overflow glue grooves 120 on the liquid-cooling base plate 100. Alternatively, at least two overflow glue grooves 120 may be evenly spaced along the second direction, thereby forming evenly distributed overflow glue grooves 120 on the liquid-cooling base plate 100. Alternatively, at least two overflow glue grooves 120 may be evenly spaced along the first direction, and at least two overflow glue grooves 120 may be evenly spaced along the second direction, thereby forming evenly distributed grid-like overflow glue grooves 120 on the liquid-cooling base plate 100. The advantage of such an arrangement is that each battery cell 201 in the battery cell assembly 20 can be effectively connected to the liquid-cooling base plate 100 through adhesive, thereby improving the connection strength between the battery cell assembly 20 and the liquid-cooling base plate 100.

[0064] In some embodiments, the cross-sectional shape of the overflow glue groove 120 includes at least one of a rectangle and a semicircle. For example, the cross-sectional shape of the glue grooves can be all rectangles, or the cross-sectional shape of the glue grooves can be all semicircular, or the cross-sectional shape of the overflow glue groove 120 can be both rectangles and semicircles.

[0065] It should be noted that when the liquid-cooled base plate 100 adopts a washing tank method to form the overflow glue groove 120, the cross-sectional shape of the overflow glue groove 120 can be rectangular. When the liquid-cooled base plate 100 adopts a rolling method to process the overflow glue groove 120, the cross-sectional shape of the overflow glue groove 120 can be semicircular. In addition, rolling the liquid-cooled base plate 100 can also eliminate the stress of the liquid-cooled base plate 100, thereby improving the structural strength of the liquid-cooled base plate 100.

[0066] Reference Figure 2 As shown, in a possible implementation, the side panel assembly 200 includes four side panels 210 , which are connected end to end along the circumference of the liquid-cooled base plate 100 , and both ends of the glue overflow groove 120 extend to the two side panels 210 respectively.

[0067] It should be understood that the two ends of the overflow glue groove 120 can extend to the two opposite side panels 210, that is, the overflow glue groove 120 can extend along the first direction and extend to the two opposite side panels 210, or the overflow glue groove 120 can extend along the second direction and extend to the two opposite side panels 210. The two ends of the overflow glue groove 120 can extend to the side edges of the two adjacent sides, that is, the overflow glue groove 120 can first extend along the first direction and then extend along the second direction and extend to the two adjacent side panels 210. This helps to improve the bonding reliability between the battery cell assembly 20 and the liquid cooling base plate 100, thereby preventing the battery cell assembly 20 from being loose or becoming loose.

[0068] Reference Figure 4 As shown, in a specific implementation, the liquid-cooling base plate 100 includes an upper plate 130 and a lower plate 140, with the glue overflow groove 120 located on the side of the upper plate 130 facing away from the lower plate 140. The side of the lower plate 140 facing the upper plate 130 has a flow channel 110 groove, and the upper plate 130 is connected to the lower plate 140 to jointly define the flow channel 110. In this way, by providing the glue overflow groove 120 on the side of the upper plate 130 facing away from the lower plate 140, the glue overflow groove 120 is also formed on the side of the liquid-cooling base plate 100 facing the side panel assembly 200, thereby improving the fit between the liquid-cooling base plate 100 and the battery cell assembly 20.

[0069] It should be noted that in order to effectively seal the flow channel 110, a glue overflow groove 120 can be first processed on the upper plate 130, and then the upper plate 130 and the lower plate 140 are connected by welding, thereby defining a flow channel 110 for the circulation of heat exchange medium between the upper plate 130 and the lower plate 140.

[0070] Reference Figure 7 As shown, in one possible implementation, the battery cell assembly 20 includes at least two battery cells 201, the at least two battery cells 201 are arranged in an array, and at least two glue overflow grooves 120 are spaced apart along the arrangement direction of the battery cells 201. At least one glue overflow groove 120 is located between two adjacent battery cells 201, and / or at least one glue overflow groove 120 is located between two side surfaces of the same battery cell 201.

[0071] It should be understood that in the above-mentioned setting, at least one glue overflow groove 120 may be located between two adjacent battery cells 201, or at least one glue overflow groove 120 may be located between the two side surfaces of the same battery cell 201, or at least one glue overflow groove 120 may be located between two adjacent battery cells 201, and at least one glue overflow groove 120 may be located between the two side surfaces of the same battery cell 201.

[0072] For example, refer to Figure 7 and Figure 8As shown, multiple battery cells 201 are arranged in the second direction, and multiple glue overflow grooves 120 are arranged along the second direction. Each glue overflow groove 120 extends along the first direction. A glue overflow groove 120 is provided between two adjacent battery cells 201, and a glue overflow groove 120 is provided under each battery cell 201. The advantage of such an arrangement is that it can effectively improve the bonding strength between each battery cell 201 and the liquid-cooling base plate 100, thereby avoiding the phenomenon of weak bonding or looseness of the battery cell 201.

[0073] In a possible implementation, the battery pack further includes adhesive glue, which is located in the adhesive overflow groove 120 and connects the battery cell 201 and the liquid-cooling base plate 100 .

[0074] With such a configuration, the battery box 10 of the battery pack can accommodate the adhesive by providing the adhesive overflow groove 120, and then reliably connect each battery cell 201 and the liquid cooling base plate 100 through the adhesive, thereby achieving a non-modular battery pack.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery box, characterized in that: It includes a liquid cooling base plate and a side enclosure assembly, wherein the side enclosure assembly is arranged around the periphery of the liquid cooling base plate and the side enclosure assembly is connected to the liquid cooling base plate; The side of the liquid-cooling bottom plate facing away from the side enclosure assembly is provided with a flow channel, and the side of the liquid-cooling bottom plate facing the side enclosure assembly is provided with a glue overflow groove, and the glue overflow groove is used to accommodate adhesive glue.

2. The battery box according to claim 1, characterized in that: The glue overflow groove extends along at least one of a first direction and a second direction; The first direction and the second direction are arranged at an angle.

3. The battery box according to claim 2, characterized in that: At least two of the glue overflow grooves are evenly spaced along the first direction; And / or, at least two glue overflow grooves are evenly spaced along the second direction.

4. The battery box according to claim 1, characterized in that: The cross-sectional shape of the glue overflow groove includes at least one of a rectangle and a semicircle.

5. The battery case according to any one of claims 1 to 4, characterized in that: The side enclosure assembly includes four side panels, which are connected end to end in sequence along the circumference of the liquid-cooling base plate, and both ends of the glue overflow groove extend to the two side panels respectively.

6. The battery case according to any one of claims 1 to 4, characterized in that: The liquid cooling base plate includes an upper plate and a lower plate, and the glue overflow groove is located on a side of the upper plate away from the lower plate; The lower plate has a flow channel groove on one side facing the upper plate, and the upper plate is connected to the lower plate to jointly define the flow channel.

7. A battery pack, characterized in that: It comprises a battery cell assembly and a battery case according to any one of claims 1 to 6, wherein the battery cell assembly is arranged in the battery case.

8. The battery pack according to claim 7, characterized in that: The battery cell assembly includes at least two battery cells, the at least two battery cells are arranged in an array, and at least two glue overflow grooves are arranged at intervals along the arrangement direction of the battery cells; At least one of the glue overflow grooves is located between two adjacent battery cells, and / or at least one of the glue overflow grooves is located between two side surfaces of the same battery cell.

9. The battery pack according to claim 8, characterized in that: It also includes adhesive glue, which is located in the glue overflow groove and connects the battery core and the liquid cooling base plate.

10. An electrical device, characterized in that: The device comprises an electric device and the battery pack as claimed in claim 9, wherein the battery pack is used to supply power to the electric device.

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