Battery pack and electric device

Abstract

The utility model provides a battery pack and an electric device. The battery comprises a box body structure, a cold plate, an integrated battery cell, a bottom protection plate and a buffer piece, the box body structure comprises an inner frame and an outer frame, and the box body structure is provided with a containing cavity. The cold plate is arranged in the containing cavity and connected to the upper portion of the inner frame in the first direction. Wherein the first direction is the height direction of the battery pack. The integrated battery cell is placed in the accommodating cavity, and the bottom of the integrated battery cell is attached to the cold plate. The bottom protection plate is arranged below the cold plate in the first direction, and a part of the bottom protection plate is connected to the bottom of the outer frame. The buffer piece is arranged between the cold plate and the bottom protection plate and connected with the other part of the bottom protection plate. According to the invention, the outer frame and the buffer part bear the impact force borne by the bottom protection plate, so that the cold plate arranged above the bottom protection plate in the first direction is prevented from being deformed due to the impact force, the normal heat dissipation function of the cold plate is ensured, the service life of the cold plate is prolonged, and the stability and safety of the battery are improved.

Description

Technical Field

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

[0002] In a battery pack that uses CTP technology, the bottom surface of the integrated battery cell is in contact with the cold plate, and the coolant in the cold plate keeps the integrated battery cell at a suitable operating temperature to ensure the usability and safety of the battery.

[0003] In related technologies, the cold plate is affected by the impact of external forces on the bottom guard plate, which makes the cold plate and the flow channel area of ​​the cold plate easily deformed, shortening the service life of the cold plate, thereby affecting the usability and safety of the battery. Utility Model Content

[0004] The present application provides a battery pack and an electrical device, which extend the life of a cold plate and improve the usability and safety of the battery.

[0005] In a first aspect, the present application provides a battery pack comprising: a box structure, a cold plate, an integrated battery cell, a bottom guard plate and a buffer. The box structure comprises an inner frame and an outer frame, and the box structure has a receiving cavity. The cold plate is arranged in the receiving cavity, and the cold plate is connected above the inner frame along a first direction. The first direction is the height direction of the battery pack. The integrated battery cell is placed in the receiving cavity, and the bottom of the integrated battery cell is fitted with the cold plate. The bottom guard plate is arranged below the cold plate along the first direction, and a portion of the bottom guard plate is connected to the bottom of the outer frame. The buffer is arranged between the cold plate and the bottom guard plate, and the buffer is connected to another portion of the bottom guard plate.

[0006] Through the first aspect, the cold plate is positioned above the inner frame along a first direction, allowing the integrated battery cells entering the battery pack from the top of the frame structure to fully adhere to the cold plate, thereby improving the heat dissipation of the battery and ensuring the stability and safety of the battery. A portion of the bottom guard plate is connected to the bottom of the outer frame, and another portion of the bottom guard plate is connected to the buffer member, allowing the outer frame and the buffer member to withstand the impact force exerted on the bottom guard plate, thereby preventing the cold plate, which is positioned above the bottom guard plate along the first direction, from deforming due to the impact force. This ensures the normal heat dissipation function of the cold plate, extends the service life of the cold plate, and thus improves the stability and safety of the battery.

[0007] In a possible design, the inner frame includes a structural beam, and the buffer member is a structural beam.

[0008] Based on the description of the above embodiment, the buffer member is a structural beam within the inner frame. While supporting the cold plate and integrated battery cells, it can also withstand the impact force of the bottom guard plate, extending the service life of the cold plate and thus improving the stability and safety of the battery. Furthermore, using the structural beam as a buffer member can reduce battery production costs.

[0009] In one possible design, the inner frame is made of steel. The outer frame is made of steel. Alternatively, the outer frame is made of aluminum.

[0010] Based on the description of the above embodiment, the inner frame is made of steel to ensure the service life of the battery. The outer frame can be made of steel or aluminum according to actual conditions.

[0011] In one possible design, the cold plate includes a profile plate having a flow channel area and a non-flow channel area. A relief groove is provided on the structural beam. The portion of the profile plate located in the flow channel area is engaged in the relief groove.

[0012] Based on the description of the above embodiment, an avoidance groove is provided on the structural beam to clamp the portion of the profile plate of the cold plate located in the flow channel area, thereby improving the assembly flatness of the cold plate, thereby making the fitting surface between the cold plate and the integrated battery cell more stable, thereby ensuring the stability and safety of the battery.

[0013] In a possible design, a first sealing gasket is provided between the bottom guard plate and the outer frame.

[0014] Based on the description of the above embodiment, in the related art, the cold plate, bottom guard plate, and outer frame are stacked and connected. A first sealing gasket is provided between the bottom guard plate and the outer frame, and a second sealing gasket is provided between the cold plate and the outer frame. Two layers of sealing gaskets require a large amount of material and are costly. Therefore, in this application, only the first sealing gasket is required between the bottom guard plate and the outer frame to achieve a sealed battery pack box structure, thereby reducing the production cost of the box structure.

[0015] In a possible design, a plurality of first rivet holes are formed on the non-flow channel area, and the cold plate is riveted to the structural beam through the first rivet holes.

[0016] Based on the description of the above embodiment, a plurality of first rivet holes are opened on the non-flow channel area, so that the non-flow channel area is riveted to the inner frame through the first rivet holes, which simplifies the connection method between the cold plate and the structural beam, saves assembly time and assembly cost.

[0017] In a possible design, structural adhesive is laid between the connection surfaces of the cold plate and the structural beam.

[0018] Based on the description of the above embodiment, laying structural adhesive between the connection surfaces of the cold plate and the inner frame can achieve pre-fixation of the cold plate and the structural beam.

[0019] In one possible design, the structural adhesive may be a sealing structural adhesive.

[0020] Based on the description of the above embodiments, the use of sealing structural adhesive can further improve the sealing of the box structure, thereby ensuring the stability and safety of the battery.

[0021] In a second aspect, the present application provides an electrical device, comprising: a battery pack according to any one of the above embodiments. The battery pack is used to provide electrical energy.

[0022] The beneficial effects of the electrical device provided in the second aspect can be referred to the beneficial effects brought about by the first aspect and the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. 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.

[0024] Figure 1 This is an exploded view of a battery pack in an embodiment of the present application.

[0025] Figure 2 This is a structural diagram of an outer frame and an inner frame in an embodiment of the present application.

[0026] Figure 3 Schematic diagram of the structure of the cold plate and outer frame in the embodiment of the present application.

[0027] Figure 4 This is a schematic structural diagram of the cold plate and inner frame in an embodiment of the present application.

[0028] Figure 5 for Figure 4 Magnified view of part B.

[0029] Description of reference numerals:

[0030] 1-outer frame; 11-first side beam;

[0031] 2-inner frame; 21-second side beam; 22-structural beam; 221-avoidance groove;

[0032] 3-cold plate; 31-plane plate; 32-profile plate; 321-flow channel area; 322-non-flow channel area; 33-first rivet hole;

[0033] 4- bottom guard plate;

[0034] 5-first sealing gasket;

[0035] X - first direction. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0038] The terms "comprises", "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0039] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0041] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0042] In addition, the expressions indicating directions such as the X direction, Y direction, and Z direction used to illustrate the operation and construction of the various components of this embodiment are not absolute but relative, and although these indications are appropriate when the various components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0043] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0044] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0045] 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, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a fixing member, such as a screw, bolt, or other fixing member. A physical connection can also be a detachable connection, such as a mutual snap-fit ​​connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. "Connected" or "connected" in a circuit structure can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate element, as long as the circuit is interconnected. It can also refer to internal communication between two elements. A signal connection can refer to a signal connection through a circuit or a signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0046] Cell-to-Pack (CTP) technology for battery modules is a battery integration technology that directly integrates cells into battery packs, eliminating the traditional module layer. This technology aims to improve battery pack space utilization and energy density while simplifying production processes and reducing costs. CTP technology can be implemented in two main ways: completely module-free and by replacing small modules with larger modules.

[0047] In a battery pack that uses CTP technology, the bottom surface of the integrated battery cell is in contact with the cold plate, and the coolant in the cold plate keeps the integrated battery cell at a suitable operating temperature to ensure the usability and safety of the battery.

[0048] In related technologies, the cold plate is affected by the impact of external forces on the bottom guard plate, which makes the cold plate and the flow channel area of ​​the cold plate easily deformed, shortening the service life of the cold plate, thereby affecting the usability and safety of the battery.

[0049] Based on this, the present application provides a battery pack, which sets a buffer between the cold plate and the bottom guard plate, so that when the bottom guard plate is hit, the impact force can be transmitted to the buffer and dispersed by the buffer, thereby extending the life of the cold plate and improving the usability and safety of the battery. Figure 1-5 Provide a detailed description.

[0050] First, as Figure 1 As shown, the present application provides a battery pack (not shown in the figure), comprising: a box structure (not shown in the figure), a cold plate 3, an integrated battery cell (not shown in the figure), a bottom guard plate 4 and a buffer. The box structure includes an inner frame 2 and an outer frame 1, and the box structure has a accommodating cavity. The cold plate 3 is arranged in the accommodating cavity, and the cold plate 3 is connected above the inner frame 2 along the first direction X. The first direction X is the height direction of the battery pack. The integrated battery cell is placed in the accommodating cavity, and the bottom of the integrated battery cell is attached to the cold plate 3. The bottom guard plate 4 is arranged below the cold plate 3 along the first direction X, and a part of the bottom guard plate 4 is connected to the bottom of the outer frame 1. The buffer is arranged between the cold plate 3 and the bottom guard plate 4, and the buffer is connected to another part of the bottom guard plate 4.

[0051] The box structure may include an outer frame 1 and an inner frame 2. Both the outer frame 1 and the inner frame 2 may be a frame structure. Figure 2 As shown, the frame structure may include multiple side beams, which are connected end to end to form the outer contour of the frame structure. In order to facilitate the distinction between the structures in the inner frame 2 and the outer frame 1, the first side beam 11 is used to refer to the side beam of the outer frame 1, and the second side beam 21 is used to refer to the side beam of the inner frame 2. Specifically, Figure 2 As shown, the inner frame 2 is nested in the outer frame 1 , and the second side beam 21 is connected to the first side beam 11 .

[0052] like Figure 3-Figure 5 As shown, the cold plate 3 may include a flow channel area 321 and a non-flow channel area 322. A coolant may flow through the flow channel area 321 to help the integrated battery cells dissipate heat effectively, keeping the battery within an optimal operating temperature range, thereby ensuring battery stability and safety.

[0053] Specifically, if Figure 3 and Figure 4As shown, the cold plate 3 may include a flat plate 31 and a profile plate 32. The flat plate 31 has a flat surface suitable for attaching to the integrated battery cell. The profile plate 32 has multiple extrusion grooves on its surface, resulting in an extrusion zone and a non-extrusion zone. When the flat plate 31 and the profile plate 32 are attached, the extrusion zone becomes the flow channel 321 of the cold plate 3, while the non-extrusion zone becomes the non-flow channel 322 of the cold plate 3.

[0054] Integrated cells are multiple cells integrated into a battery pack using CTP technology, eliminating the module layer found in traditional battery structures. This improves battery volume utilization and energy density while reducing production costs and part count. Specifically, integrated cells are typically assembled from the top of the frame structure.

[0055] In the related art, the cold plate 3 is arranged below the inner frame 2 along the first direction X. After the integrated battery cell is put into the box from the top of the frame structure, the inner frame 2 is separated from the cold plate 3, so that the integrated battery cell cannot directly fit with the cold plate 3. Based on this, the cold plate 3 in the present application is arranged on the top of the inner frame 2 along the first direction X, so that the integrated battery cell is completely fitted with the cold plate 3 after being put into the box from the top of the frame structure, thereby improving the heat dissipation effect of the battery, thereby further ensuring the stability and safety of the battery. Figure 1 As shown, the first direction X is the height direction of the battery pack.

[0056] A portion of the bottom guard plate 4 is connected to the bottom of the box structure to protect other components in the box structure from external impact and wear. The bottom guard plate 4 is usually made of high-strength materials, such as metal or composite materials, to provide sufficient strength and crash resistance.

[0057] Specifically, a portion of the bottom guard plate 4 is an edge portion of the bottom guard plate 4. Figure 1 As shown, the edge of the bottom guard plate 4 is connected to the first side beam 11. Therefore, when the edge of the bottom guard plate 4 is subjected to an external impact force, the impact force can be transmitted to the outer frame 1, so that the outer frame 1 can withstand the impact force, thereby preventing the cold plate 3 arranged above the bottom guard plate 4 in the first direction X from being deformed by the impact force, thereby ensuring the normal heat dissipation function of the cold plate 3.

[0058] The other portion of the bottom guard plate 4 is the central portion. This portion is connected to a buffer member positioned between the bottom guard plate 4 and the cold plate 3. Therefore, when an external impact force is applied to the central portion of the bottom guard plate 4, the force is transmitted to the buffer member, allowing it to withstand the impact force and prevent deformation of the cold plate 3, thereby ensuring proper heat dissipation.

[0059] Specifically, the buffer member may be a rigid connector or an elastic connector, and this application does not impose any specific limitation thereto.

[0060] In summary, the cold plate 3 is positioned above the inner frame 2 along the first direction X, allowing the integrated cells entering the battery pack from the top of the frame structure to fully mate with the cold plate 3, improving the heat dissipation of the battery and thus ensuring its stability and safety. A portion of the bottom guard plate 4 is connected to the bottom of the outer frame 1, and another portion of the bottom guard plate 4 is connected to the buffer. This allows the outer frame 1 and the buffer to withstand impact forces acting on the bottom guard plate 4, preventing deformation of the cold plate 3, which is positioned above the bottom guard plate 4 along the first direction X, from such impact forces. This ensures the proper heat dissipation of the cold plate 3, extends the service life of the cold plate 3, and thus improves the stability and safety of the battery.

[0061] In some embodiments, as Figure 1 and Figure 2 As shown, the inner frame 2 includes a structural beam 22. The buffer member is the structural beam 22.

[0062] The structural beams 22 are load-bearing structures built between the second side beams 21 to distribute the load. The structural beams 22 can include transverse beams and longitudinal beams. Transverse beams are built horizontally between the side beams, while longitudinal beams are built vertically between the side beams. The transverse and longitudinal beams are built perpendicular to each other.

[0063] Specifically, if Figure 3 and Figure 4 As shown, the cold plate 3 is placed on the structural beam 22, and the integrated battery cell is placed on the cold plate 3. The structural beam 22 is used to support the cold plate 3 and the integrated battery cell. In order to provide better support, the structural beam 22 can be made of a high-strength rigid material.

[0064] Furthermore, if Figure 1 As shown, the other portion of the bottom guard plate 4 is connected below the structural beam 22 along the first direction X. When the other portion of the bottom guard plate 4 is subjected to an impact force, the impact force is transmitted to the inner frame 2 through the structural beam 22, so that the inner frame 2 withstands the impact force on the bottom guard plate 4, thereby preventing the cold plate 3 arranged above the bottom guard plate 4 along the first direction X from being deformed by the impact force, thereby ensuring the normal heat dissipation function of the cold plate 3.

[0065] In addition, when the structural beam 22 acts as a buffer, there is no need to set up additional buffers, which reduces material input and lowers production costs.

[0066] In summary, the buffer, the structural beam 22 in the inner frame 2, supports the cold plate 3 and integrated battery cells while withstanding the impact force of the bottom guard plate 4. This extends the service life of the cold plate 3 and improves the stability and safety of the battery. Furthermore, the structural beam 22, acting as a buffer, can reduce battery production costs.

[0067] Furthermore, in some embodiments, a plurality of structural beams 22 may be provided in the inner frame 2 .

[0068] The greater the number of structural beams 22 , the greater the load that can be dispersed and the greater the impact force that can be sustained, thereby further reducing the possibility of deformation of the cold plate 3 due to the impact force and further increasing the service life of the cold plate 3 .

[0069] According to the description of the above embodiment, providing a plurality of structural beams 22 in the inner frame 2 can further increase the service life of the cold plate 3 , thereby further improving the stability and safety of the battery.

[0070] In some embodiments, the inner frame 2 is made of steel. The outer frame 1 is made of steel. Alternatively, the outer frame 1 is made of aluminum.

[0071] The inner frame 2 needs to bear weight and share the impact force, so the inner frame 2 can be made of high-strength steel to ensure the service life of the battery. The material of the outer frame 1 is not specifically limited.

[0072] According to the above content, the inner frame 2 and the outer frame 1 are connected by the first side beam 11 and the second side beam 21 .

[0073] The connection method between the first side beam 11 and the second side beam 21 may include but is not limited to the following two methods:

[0074] Method 1: Welding the first side beam 11 and the second side beam 21. When the outer frame 1 and the inner frame 2 are both made of steel, the first side beam 11 and the second side beam 21 can be connected by welding.

[0075] Method 2: Transfer welding of the first side beam 11 and the second side beam 21. When the outer frame 1 is made of aluminum and the inner frame 2 is made of steel, the first side beam 11 and the second side beam 21 can be connected by transfer welding.

[0076] Among them, the whole steel structure has better load-bearing effect and fatigue resistance. Aluminum profiles are cheaper. Operators can choose the material of the outer frame 1 according to actual needs.

[0077] In summary, the inner frame 2 is made of steel to ensure the service life of the battery. The outer frame 1 can be made of steel or aluminum according to actual conditions.

[0078] In some embodiments, as Figure 4 and Figure 5 As shown, the cold plate 3 includes a profile plate 32, which is provided with a flow channel area 321 and a non-flow channel area 322. The structural beam 22 is provided with an avoidance groove 221. The portion of the profile plate 32 located in the flow channel area 321 is clamped in the avoidance groove 221.

[0079] According to the description of the above embodiment, the cold plate 3 includes a flat plate 31 and a profile plate 32 . The flat plate 31 is bonded to the integrated battery cell, and the profile plate 32 is bonded to the structural beam 22 .

[0080] Since the portion of the profile plate 32 located in the flow channel area 321 is an extrusion area, which is generally a raised structure protruding from the non-extrusion area, the extrusion area is clipped into the avoidance groove 221 provided on the structural beam 22, so that the cold plate 3 can be flatly attached to the structural beam 22, thereby ensuring the flatness of the cold plate 3 assembly.

[0081] In summary, the avoidance groove 221 is provided on the structural beam 22 for clamping the portion of the profile plate 32 of the cold plate 3 located in the flow channel area 321, thereby improving the assembly flatness of the cold plate 3, thereby making the fitting surface between the cold plate 3 and the integrated battery cell more stable, thereby ensuring the stability and safety of the battery.

[0082] In some embodiments, as Figure 1 As shown, a first sealing gasket 5 is provided between the bottom guard plate 4 and the outer frame 1 .

[0083] The box structure of the battery pack has a receiving cavity, in which the integrated battery cell and the cold plate 3 are arranged. In order to prevent the battery from short-circuiting or reducing safety due to external moisture and contaminants, the box structure needs to be sealed.

[0084] A first sealing gasket 5 is provided between the bottom guard plate 4 and the outer frame 1 to seal the connection between the bottom guard plate 4 and the outer frame 1, thereby achieving the sealing effect of the above-mentioned box structure.

[0085] In the related art, the cold plate 3, bottom guard plate 4, and outer frame 1 are stacked and connected. A first sealing gasket 5 is provided between the bottom guard plate 4 and the outer frame 1, and a second sealing gasket is provided between the cold plate 3 and the outer frame 1. Two layers of sealing gaskets require a lot of material and are costly. Therefore, in this application, only the first sealing gasket 5 is required between the bottom guard plate 4 and the outer frame 1 to achieve a sealed battery pack box structure, thereby reducing the production cost of the box structure.

[0086] Specifically, in some embodiments, Figure 5 As shown, a plurality of first rivet holes 33 are formed on the non-flow channel area 322. The cold plate 3 is riveted to the structural beam 22 through the first rivet holes 33.

[0087] Riveting is a common connection method that can quickly connect the cold plate 3 and the structural beam 22.

[0088] In addition, since the cold plate 3 is disposed above the structural beam 22 along the first direction X, it is not necessary to provide a large number of rivet holes to ensure the connection strength between the cold plate 3 and the structural beam 22 .

[0089] According to the description of the above embodiment, a plurality of first rivet holes 33 are opened on the non-flow channel area 322, so that the non-flow channel area 322 is riveted to the inner frame 2 through the first rivet holes 33, thereby simplifying the connection method between the cold plate 3 and the structural beam 22, saving assembly time and assembly cost.

[0090] Furthermore, in some embodiments, structural adhesive is laid between the connection surfaces of the cold plate 3 and the structural beam 22 .

[0091] Structural adhesives are high-strength adhesives used to bond structural components subject to heavy loads. They offer high bond strength and excellent seismic resistance, enabling them to form strong connections between dissimilar surfaces such as metal, glass, concrete, and plastic.

[0092] Furthermore, the structural adhesive does not require altering the overall structure of the cold plate 3 during application. For example, there is no need to drill holes in the cold plate 3. Therefore, the structural adhesive can be applied to either the flow channel area 321 or the non-flow channel area 322, pre-fixing the cold plate 3 to the structural beam 22 and thereby determining the riveting position between the cold plate 3 and the structural beam 22.

[0093] Based on this, laying structural adhesive between the connection surfaces of the cold plate 3 and the inner frame 2 can achieve pre-fixation of the cold plate 3 and the structural beam 22 .

[0094] Furthermore, in some embodiments, the structural adhesive may be a sealing structural adhesive.

[0095] In addition to high bonding strength, sealing structural adhesive also has good sealing properties.

[0096] Based on the description of the above embodiments, the use of sealing structural adhesive can further improve the sealing of the box structure, thereby ensuring the stability and safety of the battery.

[0097] In a second aspect, embodiments of the present application provide an electrical device, which may include a battery pack according to any of the above embodiments. The battery pack is used to provide electrical energy. Specifically, an electrical device refers to an electrical device that uses electrical energy to perform a specific function. Electrical devices may include, but are not limited to, battery-powered vehicles, electric vehicles, and the like.

[0098] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0099] 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 of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: Box structure, cold plate, integrated battery cell, bottom guard plate and buffer parts; The box structure includes an inner frame and an outer frame, and the box structure has a receiving cavity; The cold plate is arranged in the accommodating cavity, and the cold plate is connected above the inner frame along a first direction; Wherein, the first direction is the height direction of the battery pack; The integrated battery cell is placed in the accommodating cavity, and the bottom of the integrated battery cell is in contact with the cold plate; The bottom guard plate is arranged below the cold plate along the first direction, and a portion of the bottom guard plate is connected to the bottom of the outer frame; The buffer member is disposed between the cold plate and the bottom guard plate, and the buffer member is connected to another portion of the bottom guard plate.

2. The battery pack according to claim 1, wherein: The inner frame includes structural beams; The buffer member is the structural beam.

3. The battery pack according to claim 2, wherein: The inner frame is made of steel; The outer frame is made of steel; or, The outer frame is made of aluminum.

4. The battery pack according to claim 2, wherein: The cold plate includes a profile plate; The profile plate is provided with a flow channel area and a non-flow channel area; The structural beam is provided with an avoidance groove; The portion of the profile plate located in the flow channel area is clamped in the avoidance groove.

5. The battery pack according to claim 1, wherein: A first sealing gasket is provided between the bottom guard plate and the outer frame.

6. The battery pack according to claim 4, characterized in that: A plurality of first rivet holes are formed on the non-flow channel area; The cold plate is riveted to the structural beam through the first rivet hole.

7. The battery pack according to claim 6, characterized in that: Structural adhesive is laid between the connection surfaces of the cold plate and the structural beam.

8. The battery pack according to claim 7, characterized in that: The structural adhesive may be a sealing structural adhesive.

9. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 8; The battery pack is used to provide electrical energy.

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