A battery housing, a battery pack, and a vehicle

Abstract

This application provides a battery housing, battery pack, and vehicle, relating to the field of battery housing technology, to solve the problem that existing battery housing frames have poor sealing performance and reliability due to poor sealant retention. The battery housing includes a cold plate, a battery frame, and cold plate sealant. The battery frame is located on one side of the cold plate and is arranged around its perimeter. At least one of the cold plate and the battery frame has a sealing groove. The sealing groove is formed on the side of the cold plate and the battery frame that are close to each other. The cold plate sealant is located within the sealing groove. The sealing groove has a first groove edge and a second groove edge arranged opposite each other along a direction perpendicular to its extension. Both the first groove edge and the second groove edge are located on one side of the bottom of the sealing groove. This battery housing can better utilize sealant for sealing, ensuring a good sealing effect.

Description

Technical Field

[0001] This application relates to the field of battery enclosure technology, specifically to a battery enclosure, battery pack, and vehicle. Background Technology

[0002] As people's living standards improve, cars have gradually become an essential means of transportation for most families. Among them, electric vehicles, with their advantages of being pollution-free and energy-saving, are gradually occupying a major share of the automotive market. The battery pack is a crucial component of electric vehicles, providing them with an energy source.

[0003] A battery pack generally includes a housing and a battery pack housed inside the housing. The housing typically includes a frame, an upper cover, and a lower cover. CN115020898B discloses a battery housing including an upper cover, a frame, a liquid cooling plate, and a lower protective plate. An upper sealing strip is provided between the upper cover and the upper end of the frame. The lower end of the frame is connected to both the liquid cooling plate and the lower protective plate. A lower sealing strip is provided between the lower protective plate and the lower end of the frame. The frame includes two side crossbeams and two side longitudinal beams, connected end-to-end to form the frame. The side longitudinal beams and side crossbeams are hollow inside. CN221596649U discloses a frame edge of a battery pack, including three frame sections arranged sequentially along the height direction. Each frame section forms a closed cavity extending along its length direction. The three frame sections are formed by integral roll forming of steel plates, or the three frame sections are integrally formed extruded aluminum profiles.

[0004] However, when the frame is sealed, the sealant does not store well, resulting in insufficient sealing performance and reliability. Summary of the Invention

[0005] The purpose of this application is to provide a battery box, battery pack, and vehicle to solve the problem that the existing battery box frame frame has poor storage effect on sealant, resulting in low sealing performance and sealing reliability.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, embodiments of this application provide a battery housing, including a cold plate, a battery frame, and a cold plate sealant. The battery frame is located on one side of the cold plate and is disposed around the perimeter of the cold plate. At least one of the cold plate and the battery frame has a sealing groove. The sealing groove is formed on the side of the cold plate and the battery frame that are close to each other. The cold plate sealant is located within the sealing groove. The sealing groove has a first groove edge and a second groove edge disposed opposite to each other along a direction perpendicular to its extension. Both the first groove edge and the second groove edge are located on one side of the bottom of the sealing groove.

[0008] According to the above-described technical means, the battery casing provided in this application embodiment has a sealing groove formed in at least one of the cold plate and the battery frame. The cold plate sealant can be placed within the sealing groove to achieve a sealing effect. Simultaneously, since both the first and second groove edges are located on the side of the sealing groove's bottom away from the frame space, the sealing groove can form a relatively complete sealing space. In this way, the cold plate sealant can be well placed within the sealing groove, reducing the likelihood of outflow and thus ensuring the service life of the cold plate sealant and guaranteeing a long-term stable seal.

[0009] In one possible implementation, the battery frame includes multiple frames. The multiple frames are welded end to end sequentially.

[0010] Using the aforementioned technical methods, multiple frames are interconnected by welding, resulting in a more robust connection.

[0011] In one possible implementation, the border includes a border body. The border body encloses a frame space, and a sealing groove is formed on the side of the border body away from the frame space.

[0012] Based on the above technical means, the cold plate sealing groove can be sealed by the sealing groove on the frame body.

[0013] In one possible implementation, the frame body is integrally formed and bent to form a frame space.

[0014] Based on the aforementioned technical means, the frame is an integral structure, with good overall dimensional stability and high strength.

[0015] In one possible implementation, the cross-section of the sealing groove is arc-shaped. The cross-section is perpendicular to the extension direction of the sealing groove.

[0016] Based on the aforementioned technical methods, the sealing groove has an arc-shaped cross-section and a smooth structure. This allows the cold-rolled steel plate sealant to be filled more completely into the sealing groove, preventing incomplete filling and thus reducing sealing performance.

[0017] In one possible implementation, the frame body includes a first connecting portion, a second connecting portion, a third connecting portion, and a fourth connecting portion. A sealing groove is formed on the side of the first connecting portion away from the frame space. The sealing groove extends along the extending direction of the first connecting portion. The second connecting portion intersects with the first connecting portion, with one end connected to one end of the first connecting portion. The third connecting portion is connected to the other end of the first connecting portion, located on the side of the first connecting portion closer to the second connecting portion, and spaced apart from the second connecting portion. The fourth connecting portion is connected to the other end of the second connecting portion, located on the side of the second connecting portion closer to the first connecting portion. The other end of the fourth connecting portion is bent towards the direction closer to the first connecting portion, forming a recessed portion that is recessed towards the side away from the second connecting portion, abutting against both ends of the second connecting portion. The other end of the third connecting portion abuts against the portion of the fourth connecting portion extending towards the second connecting portion to form the frame space.

[0018] According to the aforementioned technical means, a portion of the fourth connecting part can extend into the interior of the frame space and abut against both ends of the second connecting part. In this way, the fourth connecting part can provide a certain supporting effect, thereby increasing the supporting strength of the frame and improving the overall strength and support.

[0019] In one possible implementation, the third connecting portion is stepped, extending from one end of the second connecting portion and the first connecting portion to the other end of the second connecting portion, with the third connecting portion gradually approaching the second connecting portion.

[0020] According to the above technical means, the first connecting part is relatively long because it needs to connect with the cold plate. Therefore, a longer length of the first connecting part allows for a more convenient connection structure, making it easier to connect the cold plate and the frame.

[0021] In one possible implementation, a first storage groove is formed on the side of the cold plate near the battery frame. The first storage groove is positioned opposite to the weld joints of two adjacent frame members. Sealant for the cold plate is disposed within the sealing groove and the first storage groove.

[0022] Based on the aforementioned technical means, the first storage tank can further store the cold-rolled steel plate sealant, allowing for better storage. The first storage tank can store the cold-rolled steel plate sealant at the weld joints of two adjacent frames, ensuring long-term stable storage and maintaining the sealing effect between the sealant and the frame.

[0023] In one possible implementation, the cold plate includes a first cold plate and a second cold plate. The first cold plate has a first storage groove that extends through the first cold plate along the arrangement direction of the first and second cold plates. The second cold plate is stacked on the side of the first cold plate away from the battery frame.

[0024] Based on the aforementioned technical means, the first cold plate can form a receiving space, and the second cold plate can ensure that the sealant on the cold plate will not leak. In this way, through the cooperation of the first and second cold plates, the groove can be directly cut through the first cold plate during manufacturing, making the operation simpler, while the second cold plate can prevent the sealant on the cold plate from leaking from the bottom.

[0025] In one possible implementation, the cold plate includes a first cold plate. A portion of the surface of the first cold plate near the battery frame is recessed in a direction away from the battery frame to form a sealing groove.

[0026] According to the above-mentioned technical means, a sealing groove can be directly formed through the first cold plate.

[0027] In one possible implementation, the sealing groove forms a protrusion on the surface of the first cold plate away from the battery frame. The cold plate also includes a second cold plate. A portion of the surface of the second cold plate near the first cold plate is recessed in a direction away from the first cold plate to form a clearance groove. The protrusion is located within the clearance groove.

[0028] Based on the aforementioned technical means, the sealing groove can be formed by die-casting the first cold plate, which is more convenient to manufacture and can also ensure the strength of the sealing groove. At the same time, since the second cold plate has a clearance groove, other positions of the first and second cold plates can fit together well.

[0029] In one possible implementation, the battery housing further includes a bottom protective plate and a bottom protective plate sealant. The bottom protective plate is stacked on the side of the cold plate away from the battery frame. A second storage compartment is formed on the side of the bottom protective plate closest to the cold plate. The bottom protective plate sealant is located between the bottom protective plate and the cold plate, and is disposed within the second storage compartment.

[0030] Based on the above technical means, by setting up a second storage tank, the sealant of the bottom protective plate can be stored for a long time to ensure the long-term seal between the bottom protective plate and the cold plate and to ensure the reliability of the seal.

[0031] Secondly, embodiments of this application provide a battery pack, including the battery housing described in any one of the first aspects.

[0032] Since the battery pack provided in this application includes the battery housing described in any one of the first aspects, it can solve the same technical problems as the battery housing described above and achieve the same technical effects, so it will not be described again here.

[0033] Thirdly, embodiments of this application provide a vehicle including the battery pack described in the second aspect.

[0034] Since the vehicle provided in this application includes the battery pack in the second aspect, it can solve the same technical problems as the battery pack described above and achieve the same technical effects, so it will not be described again here. Attached Figure Description

[0035] Figure 1 An exploded view of a battery pack provided in an embodiment of this application;

[0036] Figure 2 An exploded view of a battery box provided in an embodiment of this application;

[0037] Figure 3 A cross-sectional view of a border provided in an embodiment of this application;

[0038] Figure 4 This is one of the partial cross-sectional views of a battery box provided in an embodiment of this application;

[0039] Figure 5 This is one of the enlarged partial views of a battery box provided in an embodiment of this application;

[0040] Figure 6 This is a second enlarged partial view of a battery box provided in an embodiment of this application;

[0041] Figure 7 This is the third enlarged partial view of a battery box provided in an embodiment of this application;

[0042] Figure 8 A partial enlarged view of a bottom protective plate provided in an embodiment of this application;

[0043] Figure 9 This is a second partial cross-sectional view of a battery box provided in an embodiment of this application;

[0044] Figure 10 A third partial cross-sectional view of another battery housing provided in this application embodiment;

[0045] Figure 11 This is a schematic diagram of another cold plate structure provided in an embodiment of this application;

[0046] Figure 12 This is a schematic diagram of another border structure provided in an embodiment of this application. Attached image description:

[0048] 1000 - Battery pack; 100 - Battery housing; 10 - Battery frame; 11 - Frame; 111 - Connecting part; 112 - First connecting part; 1121 - Sealing groove; 1122 - First groove edge; 1123 - Second groove edge; 113 - Second connecting part; 114 - Third connecting part; 115 - Fourth connecting part; 20 - Cover plate; 30 - Sealing gasket; 40 - Heating film; 50 - Hanging ear; 60 - Cold plate; 61 - First cold plate ; 611-First storage tank; 62-Second cold plate; 621-Allowing groove; 70-Cold plate sealant; 80-Bottom guard plate; 801-Second storage tank; 90-Bottom guard plate sealant; 91-Buffer pad; 92-Fastener; 93-Nut; 200-Screw; 300-Insulating plate; 400-Battery connection system; 500-Cell pack; 600-Battery disconnection unit; 700-Connecting copper busbar; 800-Battery management system. Detailed Implementation

[0049] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0050] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0051] With the improvement of people's living standards and the advancement of technology, electric vehicles have gradually become a major means of transportation. The battery pack, as a key component of electric vehicles, serves as the power system, providing the power source. Improving the energy density of the battery pack and reducing manufacturing costs are crucial ways to address the issues of high cost and short driving range in electric vehicles.

[0052] A battery pack generally consists of a housing and the batteries housed within it. In related technologies, depending on the material chosen and the manufacturing method of the housing frame, there are various manufacturing options. For example, the housing frame can utilize aluminum alloy profiles, a one-piece die-cast structure, composite materials, sheet metal, or rolled steel. Among these, the rolled steel structure, due to its lower cost and structural stability, is increasingly being chosen and applied in electric vehicles.

[0053] The main difficulty in applying the steel roll forming structure solution lies in the limitation imposed by the box structure. Since the box frame needs to be sealed with the box cover, cold plate, and bottom protective plate, the sealing structure is complex, and the sealing performance of the manufactured box frame has certain defects.

[0054] Therefore, it can be seen that in the steel roll forming structure scheme, the design of the frame cross-section has a significant impact on stability and reliability. In related technologies, a recessed area is formed on one side of the sealing surface of the frame. During installation, sealant can be applied to this area for sealing. However, because the recessed area is located on one side of the sealing surface of the frame, the sealant will be exposed to the outside, resulting in poor sealant reliability.

[0055] Based on this, this application provides a vehicle, which can be an electric vehicle, a hybrid vehicle, a solar-powered vehicle, etc., and the specific type of vehicle is not specifically limited here. In order to realize the basic functions of a car, the car may include components such as a body, chassis, power system, and electrical system.

[0056] The vehicle body may include a frame, doors, and windows. The frame forms the overall external shape of the vehicle and creates the passenger space. Doors can be rotatably connected to the frame, allowing the interior of the passenger space to be opened or closed. Windows can be mounted on the doors or the frame, providing passengers with a view of the outside environment.

[0057] The chassis may include components such as the transmission system and the drive system. The drive system drives the wheels to rotate. Depending on the drive method, drive systems can be classified as front-wheel drive, rear-wheel drive, and four-wheel drive. The transmission system transmits power generated by the engine to the wheels.

[0058] A powertrain provides power to a vehicle, enabling it to perform basic driving functions. The composition of the powertrain varies depending on the type of vehicle. For example, when the vehicle is an electric vehicle, the powertrain may include an electric motor.

[0059] To supply power to electrical components such as electric motors, the vehicle provided in this application embodiment also includes a battery system. The battery system may include a battery pack, which can be used to provide electrical energy. The battery pack can be electrically connected to the vehicle's electrical components. In this way, the electrical energy from the battery pack can be transferred to the vehicle's electrical components to provide power.

[0060] The battery pack provided in the embodiments of this application will be further described below, such as... Figure 1As shown, the battery pack 1000 provided in this embodiment may include a battery housing 100. The battery housing 100 may include a battery frame 10 and a cover plate 20. The cover plate 20 may be located on one side of the battery frame 10, covering the battery frame 10 and connected to it. For example, as... Figure 1 As shown, the battery pack 1000 may also include screws 200. The cover plate 20 can be connected to the battery frame 10 via the screws 200. In this way, the connection between the cover plate 20 and the battery frame 10 is more secure and has better reliability.

[0061] Continue to refer to Figure 1 The battery pack 1000 may also include an insulating plate 300. The insulating plate 300 may be located on the side of the cover plate 20 near the battery frame 10, serving an insulating function to ensure the insulation safety performance of the battery pack 1000. It is understood that the insulating plate 300 may be made of an insulating material. For example, the insulating plate 300 may be made of polycarbonate (PC). Of course, the insulating plate 300 may also be made of other insulating materials, depending on the actual situation; this is only an example.

[0062] Continue to refer to Figure 1 The battery pack 1000 may also include a cell connection system 400 (CCS), a cell assembly 500, a battery disconnect unit 600 (BDU), a connecting copper busbar 700, and a battery management system 800 (BMS). The cell assembly 500, composed of multiple cells, is the power source for the battery pack 1000. The cell connection system 400 interconnects the multiple cells in the cell assembly 500 to achieve the required voltage and capacity. Simultaneously, the cell connection system 400 also functions as a signal acquisition system, monitoring and collecting data on the voltage, temperature, and current of the cell assembly 500. Furthermore, as... Figure 1 As shown, the battery pack 1000 may also include a connecting copper busbar 700. The battery pack 1000 as a whole can achieve electrical connection with other components through the connecting copper busbar 700.

[0063] The battery disconnection unit 600 can disconnect and connect the circuit between the battery cell assembly 500 and other electrical components of the vehicle. For example, when the temperature of the battery cell assembly 500 is too high or the current generated is too large, the battery disconnection unit 600 can disconnect the circuit between the battery cell assembly 500 and the electrical components to ensure the safety of other electrical components.

[0064] The battery management system 800 manages and monitors the cell pack 500 to ensure its stable operation. The battery management system 800 may include a controller that can issue control signals to ensure the vehicle system operates stably under its control. For example, the battery management system 800 can be electrically connected to the battery disconnection unit 600, which can control the disconnection unit 600 to disconnect or connect circuits. When the battery management system 800 detects a fault, it can issue a control signal to cause the battery disconnection unit 600 to disconnect the cell pack 500 from other electrical components, thereby preventing further malfunctions.

[0065] It is understandable that, such as Figure 1 As shown, the cover plate 20 is located on top of the other components. After the battery frame 10 of the battery housing 100 and the cover plate 20 are connected together, the other components of the battery can be installed. Figure 1 The positional relationship shown is set within the space enclosed by the battery frame 10, enabling the battery box 100 to install other components.

[0066] The battery housing 100 provided in the embodiments of this application will be further described below. Figure 2 As shown, the battery housing 100 may also include a sealing gasket 30. The sealing gasket 30 may be located between the battery frame 10 and the cover plate 20. Figure 1 Between the battery frame 10 and the cover plate 20, it serves to seal the battery frame 10 and the cover plate 20. For example, as shown... Figure 2 As shown, the sealing gasket 30 can be annular.

[0067] Continue to refer to Figure 2 The battery housing 100 may also include a heating film 40, a hanging ear 50, a cooling plate 60, and a bottom protective plate 80. The bottom protective plate 80 may be located on the battery frame 10 away from the cover plate 20. Figure 1 On one side, located at the bottom of the battery frame 10. In this way, the bottom cover 80, the battery frame 10, and the cover 20 can form a relatively enclosed space for the battery pack 1000 ( Figure 1 Install the other components.

[0068] The cooling plate 60 can be located on the side of the bottom guard plate 80 near the battery frame 10, and is mounted on the bottom guard plate 80. The cooling plate 60 serves to cool the battery cell pack 500. It is understood that the cooling plate 60 can be connected to the vehicle's cooling system, which can then cool the cooling plate 60, allowing it to dissipate heat from the battery cell pack 500 and remove the heat generated by the battery cell pack 500.

[0069] The heating film 40 can be disposed on the cold plate 60 to heat the battery cell assembly 500. It is known that in relatively cold environments, the temperature of the battery cell assembly 500 is relatively low, and its performance will decrease at lower temperatures, especially when the battery cell assembly 500 is just starting up. Therefore, by setting up the heating film 40, the battery cell assembly 500 can be heated. During startup, the temperature of the battery cell assembly 500 can be quickly raised by the heating film 40, adjusting it to a suitable operating temperature, ensuring the normal and stable startup and operation of the battery cell assembly 500.

[0070] For example, such as Figure 2 As shown, there can be multiple heating films 40 covering the surface of the battery cell assembly 500. Thus, multiple heating films 40 respectively cover the battery cell assembly 500 (… Figure 1 By placing the cells at different locations, the temperature of the battery cell assembly 500 can be made more uniform during the heating process, thus avoiding local overheating or undercooling of the battery cell assembly 500.

[0071] Continue to refer to Figure 2 The mounting lug 50 can be installed on the battery frame 10, located on the outer periphery of the battery frame 10. The mounting lug 50 facilitates installation and fixation. When installing the battery pack 1000, the battery frame 10 can be fixed to the vehicle using the mounting lug 50, thereby allowing the battery pack 1000 ( Figure 1 It is fixed inside the vehicle. The mounting lug 50 may have holes to provide mounting positions for explosion-proof valve interfaces, water inlet / outlet pipe interfaces, or other connectors. Alternatively, the battery frame 10 may also have openings to provide mounting points.

[0072] like Figure 2 As shown, the battery frame 10 can be located on one side of the cold plate 60, arranged around the circumference of the cold plate 60. As mentioned above, the battery frame 10 needs to be sealed to the cold plate 60. (Continuing to refer to...) Figure 2 The battery housing 100 may also include a cold plate sealant 70. The cold plate sealant 70 may be disposed between the battery frame 10 and the cold plate 60 to achieve a seal between the battery frame 10 and the cold plate 60.

[0073] In some embodiments, such as Figure 2 As shown, the battery frame 10 may include multiple frame edges 11. The multiple frame edges 11 are welded end-to-end sequentially. In this way, the multiple frame edges 11 are interconnected by welding, resulting in a more robust connection. For example, as... Figure 2 As shown, there can be four borders 11, which are welded together end to end to form a rectangular battery frame 10.

[0074] To ensure the sealing effect of cold-rolled steel plate sealant 70, such as Figure 3 and Figure 10 As shown, at least one of the cold plate 60 and the battery frame 10 has a sealing groove 1121. The sealing groove 1121 is formed on the side of the cold plate 60 and the battery frame 10 that are close to each other. Wherein, as... Figure 3 As shown, along the extension direction perpendicular to the sealing groove 1121 (i.e. Figure 3 As shown in the left-right direction, the sealing groove 1121 has a first groove edge 1122 and a second groove edge 1123 disposed opposite to each other. Both the first groove edge 1122 and the second groove edge 1123 are located on one side of the bottom of the sealing groove 1121. That is, as... Figure 3 As shown, the first groove edge 1122 and the second groove edge 1123 are both located below the bottom of the sealing groove 1121.

[0075] Therefore, in the battery housing 100 provided in this embodiment, since at least one of the cold plate 60 and the battery frame 10 forms a sealing groove 1121, the cold plate sealant can be disposed within the sealing groove 1121 to achieve a sealing effect. Simultaneously, since both the first groove edge 1122 and the second groove edge 1123 are located on the side of the bottom of the sealing groove 1121 away from the frame space, the sealing groove 1121 can form a relatively complete sealing space. Thus, as... Figure 4 As shown, the cold plate sealant 70 can be well placed in the sealing groove 1121, and it is not easy for it to flow out, thus ensuring the service life of the cold plate sealant 70 and ensuring long-term stable sealing.

[0076] It is understood that the sealing groove 1121 can be formed in different locations, such as in some embodiments. Figure 3 As shown, the frame 11 provided in this embodiment may include a frame body 111. The frame body 111 encloses a frame space. A sealing groove 1121 is formed on the side of the frame body 111 away from the frame space. In this way, the cold plate sealant 70 can be sealed through the sealing groove 1121 on the frame body 111.

[0077] In some embodiments, such as Figure 3 As shown, the frame body 111 is integrally formed and bent to form the frame space. Therefore, the frame 11 is a single-piece structure with good overall dimensional stability and high strength. For example, the frame 11 can be formed by roll forming.

[0078] Of course, in other embodiments, the frame body 111 may not be integrally formed. For example, the frame body 111 may include multiple connecting parts. The multiple connecting parts can be manufactured separately and then connected together by welding to form the frame 11.

[0079] In some embodiments, such as Figure 3 As shown, the cross-section of the sealing groove 1121 is arc-shaped. The cross-section is perpendicular to the extending direction of the sealing groove 1121. Therefore, as... Figure 4 As shown, the sealing groove 1121 has an arc-shaped cross-section, resulting in a smooth structure. This allows the cold-rolled steel plate sealant 70 to fill the sealing groove 1121 more completely, preventing incomplete filling and reduced sealing performance. Of course, in other embodiments, the cross-section of the sealing groove 1121 can also have other shapes, which can be designed according to actual conditions and will not be further explained here.

[0080] In some embodiments, such as Figure 3 As shown, the frame body 111 may include a first connecting portion 112, a second connecting portion 113, a third connecting portion 114, and a fourth connecting portion 115. A sealing groove 1121 is formed on the side of the first connecting portion 112 away from the frame space. The sealing groove 1121 extends along the extending direction of the first connecting portion 112. The second connecting portion 113 intersects with the first connecting portion 112, with one end connected to one end of the first connecting portion 112. For example, the first connecting portion 112 and the second connecting portion 113 may be arranged perpendicular to each other.

[0081] The third connecting portion 114 is connected to the other end of the first connecting portion 112, located on the side of the first connecting portion 112 near the second connecting portion 113, and is spaced apart from the second connecting portion 113. The fourth connecting portion 115 is connected to the other end of the second connecting portion 113, located on the side of the second connecting portion 113 near the first connecting portion 112. The other end of the fourth connecting portion 115 is bent toward the direction near the first connecting portion 112, forming a recessed portion toward the side away from the second connecting portion 113, abutting against both ends of the second connecting portion 113, i.e. Figure 3 As shown, the fourth connecting portion 115 is U-shaped. The other end of the third connecting portion 114 abuts against the portion of the fourth connecting portion 115 extending toward the second connecting portion 113 to form a frame space.

[0082] Therefore, based on the above scheme, such as Figure 3 As shown, a portion of the fourth connecting part 115 can extend into the interior of the frame space and abut against both ends of the second connecting part 113. In this way, the fourth connecting part 115 can provide a certain support effect, thereby improving the support strength of the frame 11, making the overall strength better and providing better support.

[0083] Of course, in some other embodiments, the fourth connecting portion 115 may also be L-shaped. At this time, the other end of the third connecting portion 114 directly abuts against the other end of the fourth connecting portion 115 to form a frame space, and the fourth connecting portion 115 does not extend into the frame space. At this time, a frame can be preferably formed by the first connecting portion 112, the second connecting portion 113, the third connecting portion 114, and the fourth connecting portion 115, with a simple structure and convenient manufacturing.

[0084] In some embodiments, as Figure 3 shown, the third connecting portion 114 is stepped, and along one end of the second connecting portion 113 and the first connecting portion 112 to the other end of the second connecting portion 113 (that is, from Figure 3 below to above), the third connecting portion 114 gradually approaches the second connecting portion 113. Thus, as Figure 3 shown, the first connecting portion 112 has a relatively long dimension in the left-right direction as Figure 3 shown. Combining Figure 4 it can be seen that the first connecting portion 112 needs to be connected to the cold plate 60. Therefore, when the length of the first connecting portion 112 is relatively long, it is convenient to set the connecting structure to more conveniently realize the connection between the cold plate 60 and the frame 11. At the same time, as Figure 3 shown, the space occupied in the upper right of the frame 11 is relatively small, and an avoidance structure can be formed to facilitate the installation and placement of other components.

[0085] Of course, in some embodiments, the third connecting portion 114 may also directly extend away from the first connecting portion 112. At this time, the cross-section of the frame 11 can be generally rectangular, and can be specifically designed according to actual situations, and is only used as an example for illustration here.

[0086] It can be understood that the overall shape of the frame 11 and the specific dimensions of the frame 11 can be designed according to actual situations. Exemplarily, as Figure 3 shown, the frame 11 is generally in the shape of a Chinese character 'Ri'. Among them, the length L1 of the second connecting portion 113 in this cross-section can be 50 mm to 120 mm. The length L2 of the first connecting portion 112 can be 30 mm to 36 mm.

[0087] The length L4 of the portion of the fourth connecting portion 115 that is arranged in parallel and spaced apart from the first connecting portion 112 can be 24 mm to 30 mm. At the same time, as Figure 3 shown, the shape of the sealing groove 1121 is arc-shaped, and the distance L3 between the center of the sealing groove 1121 and the end of the first connecting portion 112 connected to the second connecting portion 113 can be 8 mm to 12 mm. At the same time, the radius R of the sealing groove 1121 can be 2 mm to 3 mm.

[0088] Of course, the border 11 provided in this embodiment can also be of other sizes and shapes. The specific design can be made according to the actual situation. This is only used as an example for illustration.

[0089] As mentioned above, the multiple frame edges 11 of the battery frame 10 are welded end to end sequentially. Due to the presence of welding material at the weld joints, the sealing groove 1121 has certain defects, being filled with the aforementioned welding material. Therefore, as... Figure 5 As shown, in some embodiments, a first storage groove 611 is formed on the side of the cold plate 60 near the battery frame 10. Therefore, the first storage groove 611 can further store the cold plate sealant, allowing for better storage of the sealant.

[0090] In some embodiments, such as Figure 6 As shown, the first storage tank 611 is positioned opposite to the welded joints of the two adjacent frame frames 11. Cold plate sealant 70 is also disposed inside the first storage tank 611.

[0091] Therefore, the first storage tank 611 can store the cold-rolled steel sealant 70 at the weld joints of two adjacent frame pieces 11, ensuring the long-term stable storage of the cold-rolled steel sealant 70 and maintaining the sealing effect between the cold-rolled steel sealant 70 and the frame piece 11. For example, as shown... Figure 5 As shown, two adjacent borders 11 are set perpendicular to each other, forming an L-shaped corner. Correspondingly, as... Figure 5 As shown, the first storage compartment 611 can be an L-shaped compartment. This allows for better storage of the cold plate sealant 70 at the connection points of the two adjacent frame edges 11, resulting in a better sealing effect.

[0092] In some embodiments, such as Figure 5 As shown, the cold plate 60 includes a first cold plate 61 and a second cold plate 62. The first cold plate 61 has a first storage groove 611, which extends through the first cold plate 61 along the arrangement direction of the first cold plate 61 and the second cold plate 62. The second cold plate 62 is stacked on the side of the first cold plate 61 away from the battery frame 10. Thus, the first cold plate 61 can form a receiving space, and the second cold plate 62 can ensure that the cold plate sealant 70 does not leak. In this way, through the cooperation of the first cold plate 61 and the second cold plate 62, the groove can be directly cut through the first cold plate 61 during manufacturing, making the operation simpler, while the second cold plate 62 can prevent the cold plate sealant 70 from leaking from the bottom.

[0093] It is understandable that the shape and size of the first storage tank 611 can also be designed according to actual conditions. For example, based on... Figure 3 and Figure 5 The border 11 shown is as follows: Figure 7As shown, the first storage tank 611 is roughly an L-shaped rectangular structure, including along... Figure 7 A portion of the groove structure extending in the left and right directions, and along Figure 7 Another section of the groove structure extends vertically.

[0094] The length D1 of the portion of the groove structure extending in the left-right direction can be 10mm to 25mm, and the width D2 can be 3mm to 6mm. The length D3 of the portion of the groove structure extending in the up-down direction can be the same as D1, ranging from 10mm to 25mm, and the width can be the same as D2, ranging from 3mm to 6mm. Of course, the first storage groove 611 can also be of other shapes or sizes, depending on the actual situation; this is only an example for illustration.

[0095] Of course, in some other embodiments, the cold plate 60 may also be a single plate. In this case, in order to ensure that the first storage groove 611 can guarantee the storage effect, when grooving the cold plate 60, the first storage groove 611 shall not penetrate the cold plate 60, so that the cold plate 60 can achieve the storage effect of the cold plate sealant 70.

[0096] In some embodiments, such as Figure 10 As shown, cold plate 60 ( Figure 9 The first cold plate 61 is included. A portion of the surface of the first cold plate 61 near the frame 11 is recessed in a direction away from the frame 11 to form a sealing groove 1121. Thus, the sealing groove 1121 can be directly formed through the first cold plate 61.

[0097] like Figure 11 As shown, the sealing groove 1121 is located on the first cold plate 61 away from the frame 11 ( Figure 10 A protrusion is formed on one side of the surface. The cold plate 60 also includes a second cold plate 62. A portion of the surface of the second cold plate 62 on the side closest to the first cold plate 61 is recessed in a direction away from the first cold plate 61 to form a relief groove 621. The protrusion is located within the relief groove 621.

[0098] Therefore, as Figure 11 As shown, the sealing groove 1121 can be formed by die-casting the first cold plate 61, which is more convenient to manufacture and can also ensure the strength of the sealing groove 1121. Meanwhile, since the second cold plate 62 has a relief groove 621, other positions of the first cold plate 61 and the second cold plate 62 can fit together well. For example, both the sealing groove 1121 and the relief groove 621 can be arc-shaped grooves. This provides better protection for the sealant on the cold plate. The radius of the sealing groove 1121 can be 2mm-4mm. For example, the radius of the sealing groove 1121 can be 4mm, 3mm, or 2mm.

[0099] based on Figure 11The scheme shown is as follows: Figure 12 As shown, the first connecting part 112 can be flat and does not have a sealing groove 1121. Figure 3 ).in, Figure 12 The specific composition and dimensions of the border 11 shown can be compared with those of the border 11 shown. Figure 3 The border 11 shown is the same, and will not be explained further here. Also, Figure 12 The radius of the chamfer R at the junction of the first connecting portion 112 and the third connecting portion 114 shown in the figure can be 1mm-3mm. For example, R can be 1mm, 2mm or 3mm.

[0100] like Figure 2 As shown, the battery housing 100 may also include a bottom protective plate sealant 90. As described above, the bottom protective plate 80 is stacked on the side of the cold plate 60 away from the battery frame 10, and the bottom protective plate sealant 90 is located between the bottom protective plate 80 and the cold plate 60 to achieve a seal between the bottom protective plate 80 and the cold plate 60.

[0101] Among them, such as Figure 8 and Figure 9 As shown, a second storage groove 801 is formed on the side of the bottom protective plate 80 near the cold plate 60. Bottom protective plate sealant 90 is disposed within the second storage groove 801. Therefore, by providing the second storage groove 801, the bottom protective plate sealant 90 can be stored effectively for a long period, ensuring a long-term seal between the bottom protective plate 80 and the cold plate 60, and guaranteeing the reliability of the seal.

[0102] For example, such as Figure 8 As shown, the second storage tank 801 can also be an arc-shaped tank. In this way, the second storage tank 801 can also form a relatively good storage space for adhesive, which can better seal the leakage of the bottom protective plate sealant 90 and prevent the bottom protective plate sealant 90 from falling off, thus affecting the overall sealing effect.

[0103] Similarly, the dimensions of the second storage tank 801 can be designed according to actual conditions. For example, based on... Figure 3 and Figure 6 The scheme shown is as follows: Figure 8 As shown, the second storage tank 801 is arc-shaped, and its radius can be 2mm to 4mm. Simultaneously, combined with... Figure 9 The distance M1 between the center of the second storage compartment 801 and the end of the bottom guard plate 80 near the frame 11 can be 20mm to 50mm. Of course, the second storage compartment 801 can also have other shapes and positions, which can be designed according to the actual situation. This is only an example for illustration.

[0104] In some embodiments, such as Figure 2As shown, the battery housing 100 may also include a buffer pad 91, which may be located between the bottom protective plate 80 and the cold plate 60 to play a certain buffering role, thereby reducing the interaction force between the bottom protective plate 80 and the cold plate 60 and ensuring the service life of the bottom protective plate 80 and the cold plate 60.

[0105] In some embodiments, such as Figure 2 and Figure 9 As shown, to facilitate the assembly of the various components of the battery housing 100, the battery housing 100 may further include fasteners 92. Fasteners 92 can be used to connect the frame 11, the cold plate 60, and the bottom protective plate 80. For example, as... Figure 9 As shown, the fastener 92 can be a bolt. The battery housing 100 also includes a nut 93. The nut 93 is connected to the frame 11. The fastener 92 can extend into the nut 93 and be threadedly connected to it.

[0106] For example, nut 93 can be a rivet nut, connected to frame 11 and cold plate 60. Fastener 92 passes through bottom guard plate 80 and is threadedly connected to the rivet nut to achieve connection of bottom guard plate 80. Similarly, as Figure 4 As shown, the nut 93 can also be located on the side of the frame 11 away from the cold plate 60. In this case, the screw 200 can be threadedly connected to the nut 93 to achieve the connection between the cover plate 20 and the frame 11.

[0107] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery housing, characterized in that, include: Cold plate (60); as well as, A battery frame (10) is located on one side of the cold plate (60) and is arranged around the cold plate (60); at least one of the cold plate (60) and the battery frame (10) has a sealing groove (1121); the sealing groove (1121) is formed on the side of the cold plate (60) and the battery frame (10) that are close to each other; and, Cold plate sealant (70), the cold plate sealant (70) is located in the sealing groove (1121); Wherein, along the extension direction perpendicular to the sealing groove (1121), the sealing groove (1121) has a first groove edge (1122) and a second groove edge (1123) arranged at relative intervals; the first groove edge (1122) and the second groove edge (1123) are both located on one side of the bottom of the sealing groove (1121); The battery frame (10) includes multiple borders (11); The cold plate (60) has a first storage groove (611) formed on the side near the battery frame (10); the first storage groove (611) is disposed opposite to the welding joints of the two adjacent frame pieces (11); the cold plate sealant (70) is disposed in the sealing groove (1121) and the first storage groove (611); The battery housing (100) also includes: A bottom protective plate (80) is stacked on the side of the cold plate (60) away from the battery frame (10); a second storage groove (801) is formed on the side of the bottom protective plate (80) near the cold plate (60); and, Bottom plate sealant (90) is located between the bottom plate (80) and the cold plate (60) and is disposed in the second storage tank (801).

2. The battery housing according to claim 1, characterized in that, Multiple of the aforementioned frame frames (11) are welded end to end in sequence.

3. The battery housing according to claim 2, characterized in that, The border (11) includes: The frame body (111) encloses a frame space; the sealing groove (1121) is formed on the side of the frame body (111) away from the frame space.

4. The battery housing according to claim 3, characterized in that, The frame body (111) is integrally formed and bent to form the frame space.

5. The battery housing according to claim 1, characterized in that, The sealing groove (1121) has an arc-shaped cross-section, which is perpendicular to the extension direction of the sealing groove (1121).

6. The battery housing according to claim 4, characterized in that, The frame body (111) includes: A first connecting portion (112) has a sealing groove (1121) formed on the side of the first connecting portion (112) away from the frame space; the sealing groove (1121) extends along the extending direction of the first connecting portion (112). The second connecting part (113) is disposed intersecting with the first connecting part (112), and one end is connected to one end of the first connecting part (112); The third connecting portion (114) is connected to the other end of the first connecting portion (112), and is located on the side of the first connecting portion (112) closer to the second connecting portion (113), and is spaced apart from the second connecting portion (113); and, The fourth connecting part (115) is connected to the other end of the second connecting part (113) and is located on the side of the second connecting part (113) close to the first connecting part (112); the other end of the fourth connecting part (115) is bent toward the direction close to the first connecting part (112) and forms a recessed part that is recessed toward the side away from the second connecting part (113), and abuts against the two ends of the second connecting part (113); The other end of the third connecting part (114) abuts against the portion of the fourth connecting part (115) extending toward the second connecting part (113) to form the frame space.

7. The battery housing according to claim 6, characterized in that, The third connecting part (114) is stepped, extending from one end of the second connecting part (113) and the first connecting part (112) to the other end of the second connecting part (113), and the third connecting part (114) gradually approaches the second connecting part (113).

8. The battery housing according to claim 1, characterized in that, The cold plate (60) includes: A first cold plate (61) is provided with a first storage compartment (611), and the first storage compartment (611) extends through the first cold plate (61) along the arrangement direction of the first cold plate (61) and the battery frame (10); and, The second cold plate (62) is stacked on the side of the first cold plate (61) away from the battery frame (10).

9. The battery housing according to claim 1, characterized in that, The cold plate (60) includes: The first cold plate (61) has a portion of its surface near the battery frame (10) recessed in a direction away from the battery frame (10) to form the sealing groove (1121).

10. The battery housing according to claim 9, characterized in that, The sealing groove (1121) forms a protrusion on the surface of the first cold plate (61) away from the battery frame (10); the cold plate (60) further includes: The second cold plate (62) has a portion of its surface near the first cold plate (61) recessed in a direction away from the first cold plate (61) to form a relief groove (621); the protrusion is located within the relief groove (621).

11. A battery pack, characterized in that, Includes the battery housing (100) according to any one of claims 1-10.

12. A vehicle, characterized in that, Includes the battery pack (1000) as described in claim 11.

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