Battery box body, battery pack and vehicle

Abstract

The invention provides a battery box body, a battery pack and a vehicle, relates to the technical field of battery box bodies, and is used for solving the problem that the sealing performance and the sealing reliability are low due to the fact that the storage effect of a frame of an existing battery box body on sealant is poor. The battery box body comprises a cold plate, a battery frame and a cold plate sealant, the battery frame is located on one side of the cold plate and arranged around the cold plate by a circle. At least one of the cold plate and the battery frame is formed with a sealing groove. The sealing groove is formed in one side where the cold plate and the battery frame are close to each other. And the cold plate sealant is positioned in the sealing groove. The sealing groove is provided with a first groove edge and a second groove edge which are oppositely arranged in the extending direction perpendicular to the sealing groove. The first groove edge and the enemy groove edge are both located on one side of the groove bottom of the sealing groove. The battery box body can be better sealed by using a sealant, and a good sealing effect is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of battery boxes, and in particular to a battery box, a battery pack and a vehicle. Background Art

[0002] With the improvement of people's living standards, cars have gradually become a necessary means of transportation for most families. Among them, electric vehicles have gradually occupied the main automobile market with their advantages such as no pollution and energy saving. Among them, the battery pack is an important part of electric vehicles and can provide energy source for electric vehicles.

[0003] A battery pack generally includes a box body and a battery pack arranged inside the box body. The box body generally includes a box body frame, an upper cover and a lower cover. CN115020898B discloses a battery box body, including an upper cover plate, a frame, a liquid cooling plate and a lower guard plate, wherein an upper sealing strip is arranged between the upper cover plate and the upper end of the frame, the lower end of the frame is connected to the liquid cooling plate and the lower guard plate, and a lower sealing strip is arranged between the lower guard plate and the lower end of the frame; the frame includes two side cross beams and two side longitudinal beams, one side cross beam, one side longitudinal beam, another side cross beam and another side longitudinal beam are connected end to end to form the frame, and the insides of the side longitudinal beams and the side cross beams are hollow. CN221596649U discloses a frame frame of a battery pack, including three frame parts, the three frame parts are arranged in sequence along the height direction, and each frame part forms a closed cavity extending along its length direction. The three frame parts are formed by integrally rolling a steel plate, or the three frame parts are integrally formed extruded aluminum profiles.

[0004] However, when the frame frame is sealed, the storage effect of the sealant is poor, resulting in insufficient sealing performance and sealing reliability. Summary of the invention

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

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, an embodiment of the present application provides a battery case, comprising 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 arranged around the cold plate. A sealing groove is formed on at least one of the cold plate and the battery frame. The sealing groove is formed on a side where the cold plate and the battery frame are close to each other. The cold plate sealant is located in the sealing groove. In which, along an extension direction perpendicular to the sealing groove, the sealing groove has a first groove edge and a second groove edge that are arranged opposite to each other. The first groove edge and the second groove edge are both located on one side of the groove bottom of the sealing groove.

[0008] According to the above technical means, the battery case provided by the embodiment of the present application has a sealing groove formed on at least one of the cold plate and the battery frame, and the cold plate sealant can be arranged in the sealing groove to achieve a sealing effect. At the same time, since the first groove edge and the second groove edge are both located on the side of the groove bottom of the sealing groove away from the frame space, the sealing groove can form a relatively complete sealing space. In this way, the cold plate sealant can be better arranged in the sealing groove, and the problem of outflow is not likely to occur, thereby ensuring the service life of the cold plate sealant and ensuring long-term stable sealing.

[0009] In a possible implementation, the battery frame includes a plurality of frames, which are welded end to end in sequence.

[0010] According to the above technical means, multiple frames are connected to each other by welding, and the connection is more reliable.

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

[0012] According to the above technical means, the cold plate sealing groove can be sealed through the sealing groove on the frame body.

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

[0014] According to the above technical means, the frame is an integrated structure as a whole, and the overall dimensional stability and strength are good.

[0015] In a possible implementation manner, the cross section of the sealing groove is arc-shaped, and the cross section is perpendicular to the extending direction of the sealing groove.

[0016] According to the above technical means, since the cross-section of the sealing groove is arc-shaped and the structure is relatively smooth, when the cold plate sealant is filled in the sealing groove, it can be better and completely filled into the sealing groove, avoiding the reduction of sealing performance caused by incomplete filling of the cold plate sealant.

[0017] In a possible embodiment, the frame body includes a first connection part, a second connection part, a third connection part and a fourth connection part. A sealing groove is formed on the side of the first connection part away from the frame space. The sealing groove extends along the extension direction of the first connection part. The second connection part is arranged to intersect with the first connection part, and one end is connected to one end of the first connection part. The third connection part is connected to the other end of the first connection part, located on the side of the first connection part close to the second connection part, and is arranged with a relative interval from the second connection part. The fourth connection part is connected to the other end of the second connection part, located on the side of the second connection part close to the first connection part. The other end of the fourth connection part is bent toward the direction close to the first connection part, and forms a recessed part that is recessed toward the side away from the second connection part, and abuts against the two ends of the second connection part. Among them, the other end of the third connection part abuts against the part of the fourth connection part extending toward the second connection part to form a frame space.

[0018] According to the above technical means, a part of the fourth connection part can extend into the interior of the frame space and abut against the two ends of the second connection part. In this way, the fourth connection part can play a certain supporting effect, thereby improving the supporting strength of the frame, making the overall strength better and being able to provide better support.

[0019] In a possible implementation manner, the third connection portion is stepped, and along the second connection portion and one end of the first connection portion to the other end of the second connection portion, the third connection portion gradually approaches the second connection portion.

[0020] According to the above technical means, the first connection part is relatively long, and since the first connection part needs to be connected to the cold plate, when the length of the first connection part is relatively long, it is convenient to set the connection structure, so as to more conveniently realize the connection between the cold plate and the frame.

[0021] In a possible implementation, a first storage groove is formed on one side of the cold plate close to the battery frame. The first storage groove is arranged opposite to the welding point of two adjacent frames. The cold plate sealant is arranged in the sealing groove and the first storage groove.

[0022] According to the above technical means, the first storage tank can further store the cold plate sealant, so that the cold plate sealant can be better stored. The first storage tank can store the cold plate sealant at the welding point of two adjacent frames to ensure that the cold plate sealant can be stored stably for a long time and ensure the sealing effect between the cold plate sealant and the frame.

[0023] In a possible embodiment, the cold plate includes a first cold plate and a second cold plate. The first cold plate is provided with a first storage tank, and the first storage tank penetrates the first cold plate along the arrangement direction of the first cold plate and the second cold plate. The second cold plate is stacked on a side of the first cold plate away from the battery frame.

[0024] According to the above technical means, the first cold plate can form a containing space, and the second cold plate can ensure that the cold plate sealant does not leak. In this way, through the mutual cooperation of the first cold plate and the second cold plate, the first cold plate can be directly penetrated to make grooves during production, which is simpler to operate, and the second cold plate can prevent the cold plate sealant from leaking from the bottom.

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

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

[0027] In a 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 close to the first cold plate is recessed in a direction away from the first cold plate to form an avoidance groove. The protrusion is located in the avoidance groove.

[0028] According to the above 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, because the second cold plate is formed with an avoidance groove, the other positions of the first cold plate and the second cold plate can be well fitted.

[0029] In a possible implementation, the battery box further includes a bottom guard plate and a bottom guard plate sealant. The bottom guard plate is stacked and arranged on a side of the cold plate away from the battery frame. A second storage tank is formed on a side of the bottom guard plate close to the cold plate. The bottom guard plate sealant is located between the bottom guard plate and the cold plate and is arranged in the second storage tank.

[0030] According to the above technical means, by providing a second storage tank, the bottom guard plate sealant can be better stored for a long time to ensure long-term sealing between the bottom guard plate and the cold plate and ensure the reliability of the sealing.

[0031] In a second aspect, an embodiment of the present application provides a battery pack, comprising the battery case described in any one of the first aspects.

[0032] Since the battery pack provided in the embodiment of the present application includes the battery case described in any one of the first aspects, it can solve the same technical problems as the above-mentioned battery case and achieve the same technical effects, which will not be described in detail here.

[0033] In a third aspect, an embodiment of the present application provides a vehicle, comprising the battery pack in the second aspect.

[0034] Since the vehicle provided in the embodiment of the present application includes the battery pack in the second aspect, it can solve the same technical problems as the above-mentioned battery pack and achieve the same technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 An exploded diagram of a battery pack provided in an embodiment of the present application;

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

[0037] Figure 3 A cross-sectional view of a frame provided in an embodiment of the present application;

[0038] Figure 4 One of the partial cross-sectional views of a battery box provided in an embodiment of the present application;

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

[0040] Figure 6 A second partial enlarged view of a battery box provided in an embodiment of the present application;

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

[0042] Figure 8 A partial enlarged view of a bottom guard plate provided in an embodiment of the present application;

[0043] Fig. 9 A second partial cross-sectional view of a battery box provided in an embodiment of the present application;

[0044] Fig.10 A third partial cross-sectional view of another battery box provided in an embodiment of the present application;

[0045] Fig.11 A schematic diagram of the structure of another cold plate provided in an embodiment of the present application;

[0046] Fig.12 A schematic diagram of the structure of another frame provided in an embodiment of the present application. Description of the drawings:

[0048] 1000-battery pack; 100-battery case; 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 pad; 40-heating film; 50-hanging ear; 60-cold plate; 61-first cold plate ;611-first storage tank;62-second cold plate;621-avoidance 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-battery cell group;600-battery disconnect unit;700-connecting copper busbar;800-battery management system. DETAILED DESCRIPTION

[0049] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0051] With the improvement of people's living standards and the advancement of science and technology, electric vehicles have gradually become the main means of transportation for people. Among them, the battery pack, as the main component of electric vehicles, can be used as the power system of electric vehicles and play the role of providing power source for electric vehicles. Among them, improving the energy density of battery packs and reducing production costs are important ways to solve the high cost and short driving range of electric vehicles.

[0052] The battery pack generally includes a box body and a battery disposed in the box body. In the related art, there are multiple manufacturing schemes for the box body frame according to the material selection and manufacturing method of the box body frame. For example, the box body frame can adopt an aluminum alloy profile structure scheme, an integrated cast structure scheme, a composite material scheme, a sheet metal box scheme or a steel roll-pressed box structure scheme. Among them, the steel roll-pressed structure scheme is gradually being selected and applied by more and more electric vehicles due to its low cost and stable structure.

[0053] Among them, the main difficulty in applying the steel roll-formed structure solution is that it is limited by the box structure. Since the frame of the box needs to be sealed with the cover plate, cold plate and bottom guard plate of the box, the sealing structure is complex and the sealing performance of the manufactured box frame has certain defects.

[0054] It can be seen that in the steel roll-pressed structure solution, the design of the cross section of the box frame has a great influence on stability and reliability. In the related art, a recessed area is formed on one side of the sealing surface of the frame. During installation, the sealant can be set in this area for sealing. However, since the recessed area is set on one side of the sealing surface of the frame, the sealant will leak out, resulting in poor reliability of the sealant.

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

[0056] The vehicle body may include a vehicle frame, vehicle doors, and vehicle windows. The vehicle frame may form the overall shape of the vehicle exterior and form a seating space for accommodating passengers. The vehicle doors may be rotatably connected to the vehicle frame and may open or close the interior passenger space. The vehicle windows may be installed on the vehicle doors or the vehicle frame to facilitate passengers to observe the external environment.

[0057] The chassis may include components such as a transmission system and a drive system. The drive system can drive the wheels to rotate. Depending on the drive mode of the drive system, the drive system can be divided into front-wheel drive, rear-wheel drive, and four-wheel drive arrangements. The transmission system can transfer the power generated by the engine to the wheels.

[0058] The power system can provide power for the vehicle so that the vehicle can complete basic driving functions. Depending on the type of vehicle, the composition of the power system is also different. Exemplarily, when the vehicle is an electric vehicle, the power system may include an electric motor.

[0059] In order to power electrical components such as motors, the vehicle provided in the embodiments of the present application further includes a battery system. The battery system may include a battery pack, which may be used to provide electrical energy. The battery pack may be electrically connected to the electrical components of the vehicle. In this way, the electrical energy of the battery pack may be transferred to the electrical components of the vehicle for powering.

[0060] The battery pack provided in the embodiment of the present application is further described below. Figure 1As shown, the battery pack 1000 provided in the embodiment of the present application may include a battery box 100. The battery box 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, covered on the battery frame 10, and connected to the battery frame 10. For example, Figure 1 As shown, the battery pack 1000 may further include screws 200. The cover plate 20 may be connected to the battery frame 10 by 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 further include an insulating plate 300. The insulating plate 300 may be located on the side of the cover plate 20 close to the battery frame 10, and may play an insulating role, thereby ensuring the insulation safety performance of the battery pack 1000. Among them, it can be understood that the insulating plate 300 may be made of an insulating material. Exemplarily, the insulating plate 300 may be made of polycarbonate (PC) material. Of course, the insulating plate 300 may also be made of other insulating materials, which may be selected according to actual conditions, and is only described here as an example.

[0062] Continue to refer to Figure 1 , the battery pack 1000 may also include a battery connection system 400 (Cell Connection System, CCS), a cell group 500, a battery disconnect unit 600 (Battery Disconnect Unit, BDU), a connecting copper bus 700 and a battery management system 800 (Battery Management System, BMS). Among them, the cell group 500 may be composed of multiple batteries and is the power source of the battery pack 1000. The battery connection system 400 can connect multiple batteries in the cell group 500 to each other to form the required voltage and capacity. At the same time, the battery connection system 400 can also play a role in signal acquisition, and can collect and monitor the voltage, temperature and current of the cell group 500. In addition, as Figure 1 As shown, the battery pack 1000 may further include a connecting copper busbar 700. The battery pack 1000 as a whole may be electrically connected to other components through the connecting copper busbar 700.

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

[0064] The battery management system 800 can manage and monitor the battery cell group 500 to ensure that the battery cell group 500 can operate stably. The battery management system 800 may include a controller, and the controller may send a control signal to ensure that the vehicle system can operate stably under the control of the controller. Exemplarily, the battery management system 800 may be electrically connected to the battery disconnect unit 600, and the battery management system 800 may control the battery disconnect unit 600 to disconnect or connect the circuit. When the battery management system 800 detects a fault, the battery management system 800 may send a control signal to cause the battery disconnect unit 600 to disconnect the electrical connection between the battery cell group 500 and other electrical components, thereby avoiding further faults.

[0065] It is understandable that if Figure 1 As shown, the cover plate 20 is located on top of other components. When the battery frame 10 and the cover plate 20 of the battery box 100 are connected to each other, other components of the battery can be installed. Figure 1 The positional relationship shown is set in the space surrounded by the battery frame 10 to achieve the installation of other components on the battery box 100.

[0066] Next, the battery box 100 provided in the embodiment of the present application is further introduced. Figure 2 As shown, the battery box 100 may further 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, which plays a role in sealing the battery frame 10 and the cover plate 20. For example, Figure 2 As shown, the sealing gasket 30 may be annular.

[0067] Continue to refer to Figure 2 The battery box 100 may further include a heating film 40, a hanging ear 50, a cold plate 60 and a bottom guard plate 80. The bottom guard plate 80 may be located at the battery frame 10 away from the cover plate 20 ( Figure 1 ) side, located at the bottom of the battery frame 10. In this way, the bottom guard plate 80, the battery frame 10 and the cover plate 20 can enclose a relatively closed space to protect the battery pack 1000 ( Figure 1 ) to install other components.

[0068] The cold plate 60 can be located on a side of the bottom guard plate 80 close to the battery frame 10 and is disposed on the bottom guard plate 80. The cold plate 60 can cool the battery cell group 500. It is understood that the cold plate 60 can be connected to the cooling system of the vehicle, and the cooling system can cool the cold plate 60 so that the cold plate 60 can dissipate heat from the battery cell group 500 and take away the heat generated by the battery cell group 500.

[0069] The heating film 40 can be arranged on the cold plate 60, and can play a role in heating the battery cell group 500. It can be known that in a relatively cold environment, the temperature of the battery cell group 500 is relatively low, and the performance of the battery cell group 500 will be relatively reduced under low temperature conditions, especially when the battery cell group 500 is just running, the performance of the battery cell group 500 will be relatively low. Therefore, by setting the heating film 40, the heating film 40 can heat the battery cell group 500, and the temperature of the battery cell group 500 can be quickly increased by the heating film 40 when starting, and adjusted to a normal and suitable temperature for operation, thereby ensuring the normal and stable startup and operation of the battery cell group 500.

[0070] For example, Figure 2 As shown, the number of the heating films 40 can be multiple, covering the surface of the battery cell group 500. In this way, the multiple heating films 40 are respectively covered on the battery cell group 500 ( Figure 1 ) at different positions, the temperature of the battery cell group 500 can be made more uniform during the heating process, avoiding local overheating or overcooling of the battery cell group 500.

[0071] Continue to refer to Figure 2 The hanging ears 50 can be arranged on the battery frame 10 and located at the periphery of the battery frame 10. The hanging ears 50 can facilitate installation and fixing. When installing the battery pack 1000, the battery frame 10 can be fixed on the vehicle through the hanging ears 50, so that the battery pack 1000 ( Figure 1 ) is fixed inside the vehicle. Among them, the hanging ear 50 may be provided with a hole to provide an installation position for an explosion-proof valve interface, an inlet and outlet water pipe interface or other connectors. Alternatively, the battery frame 10 may also be provided with an opening to provide an installation mounting point through the opening on the battery frame 10.

[0072] like Figure 2 As shown, the battery frame 10 can be located on one side of the cold plate 60 and arranged around the cold plate 60. As mentioned above, the battery frame 10 needs to be sealed with the cold plate 60. Figure 2 The battery case 100 may further 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 sealing between the battery frame 10 and the cold plate 60 .

[0073] Wherein, in some embodiments, Figure 2 As shown, the battery frame 10 may include a plurality of frames 11. The plurality of frames 11 are welded end to end in sequence. In this way, the plurality of frames 11 are connected to each other by welding, and the connection is more reliable. For example, Figure 2 As shown, the number of the frames 11 may be four, and the four frames 11 are welded end to end in sequence to form a rectangular battery frame 10 .

[0074] In order to ensure the sealing effect of the cold plate sealant 70, as Figure 3 and Fig.10 As shown, at least one of the cold plate 60 and the battery frame 10 is formed with a sealing groove 1121. The sealing groove 1121 is formed on a side where the cold plate 60 and the battery frame 10 are close to each other. Figure 3 As shown, along the extending direction perpendicular to the sealing groove 1121 (i.e. Figure 3 In the left and right directions shown in FIG. 1 , the sealing groove 1121 has a first groove edge 1122 and a second groove edge 1123 that are arranged opposite to each other. The first groove edge 1122 and the second groove edge 1123 are both located on one side of the groove bottom of the sealing groove 1121. Figure 3 As shown, the first groove edge 1122 and the second groove edge 1123 are both located below the groove bottom of the sealing groove 1121 .

[0075] Therefore, in the battery case 100 provided in the embodiment of the present application, since at least one of the cold plate 60 and the battery frame 10 is formed with a sealing groove 1121, the cold plate sealant can be disposed in the sealing groove 1121 to achieve a sealing effect. At the same time, since the first groove edge 1122 and the second groove edge 1123 are both located on the side of the groove bottom of the sealing groove 1121 away from the frame space, the sealing groove 1121 can form a relatively complete sealing space. In this way, Figure 4 As shown, the cold plate sealant 70 can be well disposed in the sealing groove 1121 and is not prone to outflow, thereby 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 at different positions. In some embodiments, such as Figure 3 As shown, the frame 11 provided in the embodiment of the present application may include a frame body 111. The frame body 111 surrounds a frame space. A sealing groove 1121 is formed on one 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, Figure 3 As shown, the frame body 111 is integrally formed and bent to form a frame space. Thus, the frame 11 is an integral structure, and the overall dimensional stability and strength are good. Exemplarily, the frame 11 can be formed by rolling.

[0078] Of course, in other embodiments, the frame body 111 may not be integrally formed. Exemplarily, the frame body 111 may include a plurality of connecting parts. The plurality of connecting parts may be made separately and then connected together by mutual welding to form the frame 11.

[0079] In some embodiments, Figure 3 As shown in FIG. 1 , 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. Figure 4 As shown, since the cross-section of the sealing groove 1121 is in an arc shape, the structure is relatively smooth. In this way, when the cold plate sealant 70 is filled in the sealing groove 1121, it can be better and completely filled into the sealing groove 1121, avoiding the reduction of the sealing performance caused by the incomplete filling of the cold plate sealant 70. Of course, in other embodiments, the cross-section of the sealing groove 1121 can also be other shapes, which can be specifically designed according to actual conditions, and no further explanation is given here.

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

[0081] The third connection portion 114 is connected to the other end of the first connection portion 112, and is located on a side of the first connection portion 112 close to the second connection portion 113, and is spaced apart from the second connection portion 113. The fourth connection portion 115 is connected to the other end of the second connection portion 113, and is located on a side of the second connection portion 113 close to the first connection portion 112. The other end of the fourth connection portion 115 is bent toward the direction close to the first connection portion 112, and forms a concave portion that is concave toward the side away from the second connection portion 113, and abuts against the two ends of the second connection portion 113, that is, Figure 3 As shown, the fourth connection portion 115 is concave-shaped. The other end of the third connection portion 114 abuts against the portion of the fourth connection portion 115 extending toward the second connection portion 113 to form a frame space.

[0082] Therefore, based on the above scheme, Figure 3 As shown, a portion of the fourth connection portion 115 can extend into the interior of the frame space and abut against the two ends of the second connection portion 113. In this way, the fourth connection portion 115 can play a certain supporting effect, thereby improving the supporting strength of the frame 11, making the overall strength better and being able to provide better support.

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

[0084] In some embodiments, Figure 3 As shown, the third connection portion 114 is stepped, extending from one end of the second connection portion 113 and the first connection portion 112 to the other end of the second connection portion 113 (i.e., Figure 3 The third connection portion 114 gradually approaches the second connection portion 113. Figure 3 As shown, the first connecting portion 112 is along Figure 3 The length in the left-right direction is longer, combined with Figure 4 It can be seen that the first connection portion 112 needs to be connected to the cold plate 60. Therefore, when the length of the first connection portion 112 is long, it is convenient to set the connection structure so as to more conveniently realize the connection between the cold plate 60 and the frame 11. Figure 3 As shown, the space occupied by the upper right portion of the frame 11 is relatively small, and a avoidance structure can be formed to facilitate the installation and placement of other components.

[0085] Of course, in some embodiments, the third connection portion 114 may also extend directly in a direction away from the first connection portion 112. At this time, the cross section of the frame 11 may be substantially rectangular, which may be specifically designed according to actual conditions, and is only described as an example here.

[0086] It is understandable that the overall shape of the frame 11 and the specific size of the frame 11 can be designed according to actual conditions. Figure 3 As shown, the frame 11 is generally in the shape of a Japanese character. The length L1 of the second connection portion 113 in the cross section may be 50 mm to 120 mm. The length L2 of the first connection portion 112 may be 30 mm to 36 mm.

[0087] The length L4 of the portion of the fourth connection portion 115 that is parallel to and spaced from the first connection portion 112 may be 24 mm to 30 mm. Figure 3 As shown, the sealing groove 1121 is in an arc shape, 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. Meanwhile, the radius R of the sealing groove 1121 can be 2 mm to 3 mm.

[0088] Of course, the frame 11 provided in the embodiment of the present application may also be of other sizes and other shapes, and may be specifically designed according to actual conditions. It is only described here as an example.

[0089] As mentioned above, the multiple frames 11 of the battery frame 10 are welded end to end in sequence. Due to the presence of welding materials, the sealing groove 1121 has certain defects and is filled with the above welding materials. Figure 5 As shown, in some embodiments, a first storage groove 611 is formed on one side of the cold plate 60 close to the battery frame 10. Thus, the first storage groove 611 can further store the cold plate sealant, so that the cold plate sealant can be better stored.

[0090] In some embodiments, Figure 6 As shown, the first storage tank 611 is disposed opposite to the welding position of two adjacent frames 11. The cold plate sealant 70 is also disposed in the first storage tank 611.

[0091] Thus, the first storage tank 611 can store the cold plate sealant 70 at the welding point of two adjacent frames 11 to ensure that the cold plate sealant 70 can be stored stably for a long time and ensure the sealing effect between the cold plate sealant 70 and the frame 11. For example, Figure 5 As shown, two adjacent frames 11 are arranged perpendicular to each other to form an L-shaped corner. Figure 5 As shown, the first storage groove 611 may be an L-shaped groove. In this way, the cold plate sealant 70 can be stored in a better manner corresponding to the connection position of two adjacent frames 11, and the sealing effect is better.

[0092] In some embodiments, 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 is provided with a first storage groove 611, and the first storage groove 611 penetrates 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 accommodating space, and the second cold plate 62 can ensure that the cold plate sealant 70 will not leak. In this way, through the mutual cooperation of the first cold plate 61 and the second cold plate 62, the first cold plate 61 can be directly penetrated to make grooves during production, which is simpler to operate, and 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. Figure 3 and Figure 5 The frame 11 shown, such as Figure 7As shown, the first storage tank 611 is a substantially L-shaped rectangular structure, including Figure 7 A portion of the groove structure extending in the left and right directions, and along Figure 7 Another part of the groove structure extending in the up-down direction.

[0094] The length D1 of a portion of the groove structure extending in the left-right direction may be 10 mm to 25 mm. The width D2 may be 3 mm to 6 mm. The length D3 of a portion of the groove structure extending in the up-down direction may be the same as the length of D1, which is 10 mm to 25 mm. The width may be the same as D2, which is 3 mm to 6 mm. Of course, the first storage tank 611 may also be of other shapes or other sizes, which may be specifically designed according to actual conditions, and is only described as an example here.

[0095] Of course, in 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 achieve a storage effect, when the cold plate 60 is slotted, the first storage groove 611 cannot penetrate the cold plate 60, so that the cold plate 60 can achieve a storage effect on the cold plate sealant 70.

[0096] In some embodiments, Fig.10 As shown, the cold plate 60 ( Fig. 9 ) includes a first cold plate 61. A portion of the surface of the first cold plate 61 close to 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 by the first cold plate 61.

[0097] like Fig.11 As shown, the sealing groove 1121 is located at the first cold plate 61 away from the frame 11 ( Fig.10 The cold plate 60 further includes a second cold plate 62. A portion of the surface of the second cold plate 62 on the side close to the first cold plate 61 is recessed in a direction away from the first cold plate 61 to form an avoidance groove 621. The protrusion is located in the avoidance groove 621.

[0098] Therefore, if Fig.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. At the same time, since the second cold plate 62 is formed with an avoidance groove 621, other positions of the first cold plate 61 and the second cold plate 62 can be better fitted. Exemplarily, the sealing groove 1121 and the avoidance groove 621 can both be arc-shaped grooves. In this way, the cold plate sealant can be better protected. Among them, the radius of the sealing groove 1121 can be 2mm-4mm. For example, the radius of the first sealing groove 1121 can be 4mm, 3mm or 2mm.

[0099] based on Fig.11The scheme shown, such as Fig.12 As shown, the first connecting portion 112 may be in the form of a flat plate, without a sealing groove 1121 ( Figure 3 ).in, Fig.12 The specific composition and size of the frame 11 shown can be Figure 3 The frame 11 shown is the same and will not be further described here. Fig.12 The radius of the chamfer R of the frame 11 at the connection between the first connection portion 112 and the third connection portion 114 may be 1 mm to 3 mm. For example, R may be 1 mm, 2 mm or 3 mm.

[0100] like Figure 2 As shown, the battery box 100 may further include a bottom guard plate sealant 90. As can be seen from the above, the bottom guard plate 80 is stacked on the side of the cold plate 60 away from the battery frame 10, and the bottom guard plate sealant 90 is located between the bottom guard plate 80 and the cold plate 60 to achieve sealing between the bottom guard plate 80 and the cold plate 60.

[0101] Among them, Figure 8 and Fig. 9 As shown, a second storage tank 801 is formed on one side of the bottom guard plate 80 close to the cold plate 60. The bottom guard plate sealant 90 is arranged in the second storage tank 801. Thus, by providing the second storage tank 801, the bottom guard plate sealant 90 can be well stored for a long time, so as to ensure the long-term sealing between the bottom guard plate 80 and the cold plate 60 and the reliability of the sealing.

[0102] For example, Figure 8 As shown, the second storage groove 801 can also be an arc-shaped groove. In this way, the second storage groove 801 can also form a relatively good glue storage space, which can better seal the bottom guard plate sealant 90 from leaking out, avoiding the bottom guard plate sealant 90 from detaching and affecting the overall sealing effect.

[0103] Similarly, the size of the second storage tank 801 can be designed according to actual conditions. Figure 3 and Figure 6 The scheme shown, such as Figure 8 As shown, the second storage tank 801 is arc-shaped, and the radius of the second storage tank 801 can be 2mm to 4mm. Fig. 9 The distance M1 between the center of the second storage tank 801 and the end of the bottom guard plate 80 close to the frame 11 can be 20 mm to 50 mm. Of course, the second storage tank 801 can also have other shapes and positions, which can be designed according to actual conditions, and are only described as examples here.

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

[0105] In some embodiments, Figure 2 and Fig. 9 As shown, in order to realize the assembly between the various components of the battery box 100, the battery box 100 may also include a fastener 92. The fastener 92 may be used to realize the connection between the frame 11, the cold plate 60 and the bottom guard plate 80. For example, Fig. 9 As shown, the fastener 92 can be a bolt. At the same time, the battery box 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 the nut 93.

[0106] For example, the nut 93 may be a rivet nut connected to the frame 11 and the cold plate 60. The fastener 92 passes through the bottom guard plate 80 and is threadedly connected to the rivet nut to achieve the connection of the bottom guard plate 80. Figure 4 As shown, the nut 93 may also be disposed on a side of the frame 11 away from the cold plate 60. At this time, the screw 200 may be threadedly connected with the nut 93 to achieve connection between the cover plate 20 and the frame 11.

[0107] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery box, 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) is formed with a sealing groove (1121); the sealing groove (1121) is formed on a side where the cold plate (60) and the battery frame (10) are close to each other; and Cold plate sealant (70), the cold plate sealant (70) is located in the sealing groove (1121); Wherein, along an extension direction perpendicular to the sealing groove (1121), the sealing groove (1121) has a first groove edge (1122) and a second groove edge (1123) which are arranged relatively at intervals; the first groove edge (1122) and the second groove edge (1123) are both located on one side of the groove bottom of the sealing groove (1121).

2. The battery box according to claim 1, characterized in that: The battery frame (10) comprises a plurality of frames (11); the plurality of frames (11) are welded end to end in sequence.

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

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

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

6. The battery box according to claim 4, characterized in that: The frame body (111) comprises: A first connecting portion (112), wherein the sealing groove (1121) is formed on a side of the first connecting portion (112) away from the frame space; the sealing groove (1121) extends along an extending direction of the first connecting portion (112); A second connecting portion (113) is arranged to intersect with the first connecting portion (112), and one end of the second connecting portion (113) is connected to one end of the first connecting portion (112); a third connection portion (114), connected to the other end of the first connection portion (112), located on a side of the first connection portion (112) close to the second connection portion (113), and arranged opposite to the second connection portion (113) and spaced apart from each other; and a fourth connecting portion (115), the fourth connecting portion (115) being connected to the other end of the second connecting portion (113) and being located on a side of the second connecting portion (113) close to the first connecting portion (112); the other end of the fourth connecting portion (115) being bent in a direction close to the first connecting portion (112) and forming a recessed portion recessed in a direction away from the second connecting portion (113), and being in contact with two ends of the second connecting portion (113); The other end of the third connection portion (114) abuts against a portion of the fourth connection portion (115) extending toward the second connection portion (113) to form the frame space.

7. The battery case according to claim 6, characterized in that: The third connection portion (114) is in a stepped shape, and along one end of the second connection portion (113) and the first connection portion (112) to the other end of the second connection portion (113), the third connection portion (114) gradually approaches the second connection portion (113).

8. The battery box according to claim 2, characterized in that: A first storage groove (611) is formed on one side of the cold plate (60) close to the battery frame (10); the first storage groove (611) is arranged opposite to the welding position of two adjacent frames (11); and the cold plate sealant (70) is arranged in the sealing groove (1121) and the first storage groove (611).

9. The battery case according to claim 8, characterized in that: The cold plate (60) comprises: a first cold plate (61), wherein the first cold plate (61) is provided with the first storage groove (611), and the first storage groove (611) penetrates 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 a side of the first cold plate (61) away from the battery frame (10).

10. The battery box according to claim 1, characterized in that: The cold plate (60) comprises: A first cold plate (61), wherein a portion of a surface of the first cold plate (61) on a side close to the battery frame (10) is recessed in a direction away from the battery frame (10) to form the sealing groove (1121).

11. The battery case according to claim 10, characterized in that: The sealing groove (1121) forms a protrusion on the surface of the first cold plate (61) at a side away from the battery frame (10); The cold plate (60) further comprises: A second cold plate (62), wherein a portion of a surface of the second cold plate (62) on a side close to the first cold plate (61) is recessed in a direction away from the first cold plate (61) to form an avoidance groove (621); and the protrusion is located in the avoidance groove (621).

12. The battery case according to claim 1, characterized in that: The battery box (100) further comprises: A bottom guard plate (80), the bottom guard plate (80) being stacked on a side of the cold plate (60) away from the battery frame (10); a second storage tank (801) is formed on a side of the bottom guard plate (80) close to the cold plate (60); and, The bottom guard plate sealant (90) is located between the bottom guard plate (80) and the cold plate (60) and is arranged in the second storage tank (801).

13. A battery pack, characterized in that: A battery case (100) comprising any one of claims 1 to 12.

14. A vehicle, characterized in that: Includes the battery pack (1000) as claimed in claim 13.

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