Battery box body

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery box body which comprises a bottom plate and a frame, the frame is fixedly connected to the bottom plate, and the bottom plate and the frame are encircled to form an accommodating space for placing a battery; the bottom plate comprises a first bottom plate and a second bottom plate which is connected with the first bottom plate through a first supporting plate arranged on the first bottom plate, so that the bottom plate is of a layered structure. Through the layered design of the bottom plate, the deformation of the bottom plate caused by external impact can be effectively reduced, the thickness and the rigidity of the bottom plate are increased, and the bottom plate is more difficult to deform, so that the safety and the stability of the whole battery pack are guaranteed, the service life of the battery pack is prolonged, the maintenance and after-sales costs are reduced, and the service life of the battery pack is prolonged. And the large-area bottom plate is fully utilized to cool batteries, electric devices and the like in the battery pack, so that the stability of the air temperature environment in the battery pack is maintained, a good charging environment of the battery pack is guaranteed, and the safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery box. Background Art

[0002] The existing battery packs on the market are installed at the bottom of the car, wherein the bottom plate of the battery box where the battery module is installed is an aluminum plate directly extruded from a profile as the bottom plate of the battery box. On the one hand, the safety protection performance is insufficient. Under harsh operating conditions, the bottom plate of the battery pack is easily damaged, resulting in the inability to ensure the sealed environment inside the battery pack. The operation of the components in the battery pack in an unstable working environment will shorten the service life of the components, thereby increasing the after-sales cost of repair and replacement of the battery pack. On the other hand, the bottom plate cannot be used as a cooling plate for the battery, so that the large area of ​​the bottom plate is not fully utilized to cool the batteries and electrical components in the battery pack, reducing the utilization efficiency of the bottom plate. Utility Model Content

[0003] The main purpose of the present application is to provide a battery box, aiming to solve the technical problem that the bottom plate of the current battery box is block-shaped.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a battery box, including a bottom plate and a frame;

[0005] The frame is fixedly connected to the bottom plate, and the bottom plate and the frame together form a receiving space for placing batteries;

[0006] The bottom plate includes a first bottom plate and a second bottom plate connected to the first bottom plate via a first support plate arranged on the first bottom plate, so that the bottom plate is a layered structure.

[0007] Furthermore, a third bottom plate is arranged at one end of the second bottom plate away from the first bottom plate, the third bottom plate forms a layered structure with the second bottom plate through a second support plate, and a liquid cooling channel is arranged between the second bottom plate and the third bottom plate.

[0008] Furthermore, an exhaust channel opening toward the battery is provided on the second bottom plate and on one side of the liquid cooling channel, and the liquid cooling channel and the exhaust channel are spaced apart from each other by the second support plate;

[0009] Furthermore, the first bottom plate, the second bottom plate, the third bottom plate, the first support plate and the second support plate are an integrated piece.

[0010] Furthermore, an exhaust cover plate for covering the exhaust channel is provided on the exhaust channel, and an exhaust outlet and exhaust holes are provided on the exhaust cover plate, and the exhaust holes correspond one-to-one to the batteries provided on the exhaust cover plate.

[0011] Furthermore, a third support plate for supporting the exhaust cover plate is also provided on the second bottom plate, and the third support plate and the second bottom plate are an integral part.

[0012] Furthermore, a plurality of positioning pins are arranged in the exhaust passage of the second bottom plate, and positioning holes for the positioning pins to pass through are arranged on the exhaust cover plate.

[0013] Furthermore, the bottom plate further comprises a plurality of water inlet and outlet nozzles, and the water inlet and outlet nozzles are connected to the third bottom plate, and are used for the cooling liquid to flow in and out of the liquid cooling channel;

[0014] The third bottom plate is provided with water inlet and outlet holes for the water inlet and outlet nozzles to pass through, and the water inlet and outlet holes are arranged to be staggered with each other.

[0015] Furthermore, the bottom plate includes a plurality of bottom plates, and the plurality of bottom plates are spliced ​​along their width direction to obtain a bottom plate assembly, and the lateral size of the bottom plate assembly is controlled by increasing or reducing the bottom plates.

[0016] Furthermore, the bottom plate also includes at least one reserved plate, and the reserved plate is arranged between a plurality of the bottom plates, or between the bottom plate and the frame.

[0017] Furthermore, an exhaust confluence channel is provided on the frame at the same end as the exhaust outlet of the exhaust cover plate, and an exhaust confluence port connected to the exhaust outlet is provided on the exhaust confluence channel.

[0018] Beneficial effects:

[0019] The utility model provides a battery box, including a bottom plate and a frame; the frame is fixedly connected to the bottom plate, and the bottom plate and the frame are combined to form a storage space for placing batteries; the bottom plate includes a first bottom plate, and a second bottom plate connected to the first bottom plate by a first support plate arranged on the first bottom plate, so that the bottom plate is a layered structure. On the one hand, the layered structure design of the bottom plate can effectively reduce the deformation of the bottom plate caused by external impact, increase the thickness and rigidity of the bottom plate, and make it more difficult to deform, thereby ensuring the safety and stability of the entire battery pack, improving the service life of the battery pack, and reducing maintenance and after-sales costs. On the other hand, the liquid cooling channel is integrated on the bottom plate, and the large area of ​​the bottom plate is fully utilized to cool the batteries and electrical components in the battery pack, maintain the stability of the temperature environment in the battery pack, ensure a good charging environment for the battery pack, maintain the electrical components to work in a constant temperature environment, avoid damage to the electrical components due to drastic temperature changes, extend the service life of the electrical components, ensure the stability of the electronic control system, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall schematic diagram of a battery box according to an embodiment of the utility model;

[0021] Figure 2 This is an overall schematic diagram of the bottom plate and the reserved plate of an embodiment of the utility model;

[0022] Figure 3 This is an exploded schematic diagram of the bottom plate of an embodiment of the utility model;

[0023] Figure 4 This is a partial enlarged view of the explosion A of the bottom plate of an embodiment of the utility model;

[0024] Figure 5 This is a cross-sectional view of a bottom plate of an embodiment of the utility model;

[0025] Figure 6 This is a liquid cooling trend diagram of an embodiment of the utility model;

[0026] Figure 7 This is an overall schematic diagram of an exhaust cover plate of an embodiment of the utility model;

[0027] Figure 8 This is a partial enlarged view of the exhaust cover plate at position B of an embodiment of the utility model;

[0028] Fig. 9 It is an overall schematic diagram of a battery pack according to an embodiment of the present utility model.

[0029] in:

[0030] 1-bottom plate; 2-frame; 3-reserved plate; 4-bottom plate assembly; 40-third bottom plate; 41-second bottom plate; 42-first bottom plate; 43-second support plate; 45-third support plate; 44-first support plate; 50-exhaust cover plate; 51-exhaust channel; 52-first liquid cooling channel; 53-exhaust outlet; 54-exhaust hole; 55-second liquid cooling channel; 60-positioning pin; 61-positioning hole; 70-water inlet and outlet nozzle; 71-water inlet and outlet hole; 80-exhaust confluence channel; 81-exhaust confluence port; 83-battery management system; 84-battery; 85-explosion-proof valve.

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] Reference Figure 1-Figure 9 A battery box comprises a bottom plate 1 and a frame 2; the frame 2 is fixedly connected to the bottom plate 1, and the bottom plate 1 and the frame 2 together form a receiving space for placing a battery 84; the bottom plate 1 comprises a first bottom plate 42, and a second bottom plate 41 connected to the first bottom plate 42 via a first support plate 43 arranged on the first bottom plate 42, so that the bottom plate 1 is a layered structure.

[0037] In the above embodiment, the battery box includes a plurality of bottom plates 1 and a frame 2, and the frame 2 is fixedly connected to the bottom plate 1, wherein the fixed connection method preferably adopts laser welding, so that during welding, the laser beam can release a large amount of energy in a concentrated manner in a short time in the welding area, ensuring that the welding point between the frame 2 and the bottom plate 1 can be heated and melted in a very short time, and a uniform and dense weld is formed, thereby achieving a high-strength connection, improving the firmness and stability of the connection between the frame 2 and the bottom plate 1, and further the frame 2 is surrounded by the bottom plate 1 to form a accommodating space, which is mainly used to place the battery 84, thereby effectively protecting the battery 84 from external impact, extrusion or other damage, wherein the battery box is applied to but Not limited to single cells or modules, the bottom plate 1 further includes a first bottom plate 42, and a plurality of first support plates 43 are arranged on the first bottom plate 42, so that the first support plates 43 extend along the length direction of the first bottom plate 42, and the corners at the connection between the first bottom plate 42 and the second bottom plate 41 and the first support plate 43 are arc-shaped, so that the arc-shaped corners can disperse stress more evenly, reduce local stress concentration, and thus improve the strength and durability of the connection. In addition, the bottom plate 1 also includes a second bottom plate 41 connected to the first bottom plate 42 through the first support plate 43, and the first support plate 43 can provide stable support for the layered structure of the first bottom plate 42 and the second bottom plate 41, and can effectively increase The supporting points and supporting area of ​​the second supporting plate 43 can reduce the deformation and swing of the first bottom plate 42 and the second bottom plate 41 when subjected to external force, and can also increase the rigidity and strength of the structure, thereby improving its overall durability and safety. Further, the first supporting plate 43 and the first bottom plate 42 and the second bottom plate 41 are preferably an integrated piece, so that when the battery 84 is installed in the accommodating space of the battery box, the bottom plate 1 of the battery box is located at the bottom of the vehicle, so that when the vehicle is traveling on a complex and harsh road environment, the multi-layer design of the bottom plate 1 can form an interlayer as a buffer zone, thereby effectively reducing the deformation of the bottom plate 1 caused by external impact, and reducing the impact on the battery 84 in the battery box. The change in spatial arrangement increases the thickness and rigidity of the bottom plate 1, making it more difficult to deform, thereby ensuring the safety and stability of the entire battery pack, increasing the service life of the battery pack, and reducing maintenance and after-sales costs. Furthermore, the layered structure of the first bottom plate 42 and the second bottom plate 41 can reduce the deformation of the bottom plate 1 caused by external impact, effectively avoiding the impact on the battery 84 in the battery case, and improving the protection strength of the lower surface of the battery 84 in contact with the bottom plate 1, ensuring the safety performance of the entire battery pack. The layered structure can also serve as an insulation layer, so that the internal temperature environment of the battery pack is indirectly in contact with the external temperature environment, thereby achieving internal insulation of the battery pack and reducing the thermal management energy consumption of the battery pack.

[0038] Reference Figure 1-Figure 9In one embodiment, a third bottom plate 40 is provided at one end of the second bottom plate 41 away from the first bottom plate 42, the third bottom plate 40 forms a layered structure with the second bottom plate 41 through a second support plate 43, and a liquid cooling channel is provided between the second bottom plate 41 and the third bottom plate 40.

[0039] In the above embodiment, a third bottom plate 40 is provided at one end of the second bottom plate 41 away from the first bottom plate 42, and a plurality of second support plates 43 are provided on the second bottom plate 41. In addition, the second support plates 43 extend along the length direction of the second bottom plate 4, so that a third bottom plate 40 connected to the second bottom plate 41 through the second support plates 43 is provided on the liquid cooling channel. Therefore, the second support plates 43 provide a stable support for the second bottom plate 4 and the third bottom plate 40, ensuring that when the battery 84 is located on the third bottom plate 40, the second support plates 43 can provide additional support to prevent the battery 84 from generating unnecessary swing or displacement during movement or vibration, which helps to maintain a stable position of the battery 84 and avoid accidental collision or damage, so that the third bottom plate 40 is connected to the second bottom plate 41 through the second support plates 43. The bottom plate 41 forms a layered structure, and a liquid cooling channel is further provided between the second bottom plate 41 and the third bottom plate 40, so that when the liquid cooling channel is provided on the second bottom plate 41, the heat conduction area can be effectively increased, and the heat transfer speed can be accelerated, thereby improving the heat conduction efficiency and the cooling effect, and the second support plate 43 and the second bottom plate 41 and the third bottom plate 40 are preferably an integrated piece, so that the weak points at the connection can be reduced, thereby increasing the stability and firmness of the entire structure, helping to reduce the risk of deformation or fracture during use, and improving the reliability of battery assembly, and the corners at the connection between the second bottom plate 41 and the third bottom plate 40 and the first support plate 40 are arc-shaped, so that the arc-shaped corners can disperse stress more evenly, reduce local stress concentration, and thus improve the strength and durability of the connection.

[0040] Reference Figure 1-Figure 9 In one embodiment, an exhaust channel 51 opening toward the battery 84 is provided on the second bottom plate and on one side of the liquid cooling channel, and the liquid cooling channel and the exhaust channel 51 are spaced apart from each other by the second support plate 43.

[0041] In the above embodiment, an exhaust channel with an opening toward the battery 84 is provided on the second bottom plate and on one side of the liquid-cooling channel, wherein the liquid-cooling channel preferably includes a first liquid-cooling channel 52, and a second liquid-cooling channel 55 symmetrical to the first liquid-cooling channel 52, so that a plurality of liquid-cooling channels are formed on the bottom plate 1 to cool the battery 84, and by evenly distributing the coolant on the first liquid-cooling channel 52 and the second liquid-cooling channel 55 on the bottom plate 1, it is possible to ensure that the heat of the battery 84 is evenly conducted, and the situation where the local temperature is too high or too low can be avoided, which helps to improve the life and performance stability of the battery 84, and further, an exhaust channel 51 with an opening toward the battery 84 is provided between the first liquid-cooling channel 52 and the second liquid-cooling channel 55, and the liquid-cooling channel and the exhaust channel 51 are spaced apart from each other by the second support plate 43, so that the exhaust channel 51 and the first liquid-cooling channel 52 are spaced apart from each other. The first liquid-cooling channel 52 and the second liquid-cooling channel 55 are integrated on the bottom plate 1, which helps to increase the internal space of the battery box and ensure that the layout space of the battery 84 can be larger, which is beneficial to improving the system energy density of the battery system. In addition, when the battery pack has special circumstances that cause the battery 84 to thermally run away, the first liquid-cooling channel 52 and the second liquid-cooling channel 55 can isolate and cool the high-temperature gas in the exhaust channel 51, slow down the temperature rise rate in the battery, and improve the safety of the battery system. Furthermore, the first bottom plate, the second bottom plate, the third bottom plate, the first support plate and the second support plate are integrated into one piece, so that the structure of the entire bottom plate 1 is formed by extrusion of aluminum profiles. The bottom plate 1 with a complex shape can be produced quickly and efficiently through an extrusion process. This processing method has low cost and energy consumption, can meet the needs of mass production, and is also conducive to personalized design and customized production, effectively improving production efficiency.

[0042] Reference Figure 1-Figure 9 In one embodiment, an exhaust cover plate 50 for covering the exhaust channel 51 is provided on the exhaust channel 51 , and an exhaust outlet 53 and an exhaust hole 54 are provided on the exhaust cover plate 50 .

[0043] In the above embodiment, an exhaust cover plate 50 for covering the exhaust channel 51 is provided on the exhaust channel 51, and the exhaust cover plate 54 is detachably provided between the first liquid-cooling channel 52 and the second liquid-cooling channel 55, so that the exhaust cover plate 50 and the second bottom plate 41 are separate parts. When the exhaust cover plate 50 is maintained or replaced, the exhaust cover plate 50 can be handled separately without disassembling the entire support plate structure, and the long sides of both sides of the exhaust cover plate 50 are supported and contacted with the third bottom plate 40 through the second support plate 43, and the contact surface of the exhaust cover plate 50 and the third bottom plate 40 is coated with a sealant for sealing and fixing, which can ensure that the connection between the exhaust cover plate 50 and the third bottom plate 40 is well sealed, thereby improving the sealing of the connection between the two, and further exhausting An exhaust outlet 53 is provided on the exhaust cover plate 50, and is preferably provided at the end of the short side of the exhaust cover plate 50, so that the exhaust outlet 53 can be more conveniently connected to other components, thereby improving assembly efficiency. An exhaust hole 54 is also provided on the exhaust cover plate 50, and the battery 84 provided on the exhaust cover plate 50 corresponds to the exhaust hole 54 one by one, so that the battery exhaust can be effectively discharged from the exhaust hole 54, thereby avoiding the accumulation of battery exhaust inside the battery pack and improving the safety performance of the battery pack. The shape and position of the exhaust hole 54 can be changed according to the directional exhaust design of the battery 84 system applied in the battery system. The exhaust outlet 53 and the exhaust hole 54 are preferably obtained by punching on the sheet metal, thereby reducing the processing difficulty and processing cost compared with machining.

[0044] Reference Figure 1-Figure 8 In one embodiment, a third support plate 45 for supporting the exhaust cover plate 50 is further provided on the second bottom plate 41 , and the third support plate 45 and the second bottom plate 41 are integrally formed.

[0045] In the above embodiment, a third support plate 45 for supporting the exhaust cover plate 50 is also provided on the second bottom plate 41, and the third support plate 45 extends along the entire length direction of the second bottom plate 41, so that the support points and support areas of the third support plate 45 and the exhaust cover plate 50 can be increased, thereby improving the stability of the entire structure, and the extended design of the third support plate 45 can increase the rigidity and strength of supporting the exhaust cover plate 50, so that it can better withstand external vibration, impact or other forces, and can improve the durability and safety of the exhaust cover plate 50, and extend its service life. Further, the third support plate 45 and the second bottom plate 41 are an integral part, which can effectively share and withstand the effects of external forces, reduce the deformation and swing of the exhaust cover plate 50, and the corner at the connection between the third support plate 45 and the second bottom plate 41 is an arc-shaped, so that the arc-shaped corner can disperse stress more evenly, reduce local stress concentration, and thus improve the strength and durability of the connection.

[0046] Reference Figure 1-Figure 8 In one embodiment, a plurality of positioning pins 60 are disposed in the exhaust passage 51 of the second bottom plate 41 , and positioning holes 61 for the positioning pins 60 to pass through are disposed on the exhaust cover plate 50 .

[0047] In the above embodiment, a plurality of positioning pins 60 are arranged in the exhaust channel 51 of the second bottom plate 41, and the positioning pins 60 are preferably arranged at both ends of the exhaust channel 51, so that the plurality of positioning pins 60 are staggered and arranged on the exhaust channel 51, so that the load at the connection between the positioning pins 60 and the exhaust cover plate 50 can be evenly dispersed, local stress concentration can be reduced, and the strength and durability of the connection between the positioning pins 60 and the exhaust cover plate 50 can be improved, which helps to achieve a more uniform load distribution and simplify the installation and removal process of the exhaust cover plate 50. The positioning pins 60 can A reliable positioning method is provided to make installation and disassembly more convenient and quick, reduce the complexity and time cost of operation, and further provide a positioning hole 61 for the positioning pin 60 to pass through on the exhaust cover plate 50, so that the positioning pin 60 can pass through the positioning hole 61 to accurately set the exhaust cover plate 50 on the exhaust channel 51, thereby achieving precise positioning of the exhaust cover plate 50, and the diameter of the positioning pin 60 and the size of the positioning hole 61 can be designed very accurately to ensure that the position and direction of the exhaust cover plate 50 and the exhaust channel 51 are fully matched to avoid offset and error.

[0048] Reference Figure 1-Figure 9 In one embodiment, the base plate 1 further includes a plurality of water inlet and outlet nozzles 70, and the water inlet and outlet nozzles 70 are connected to the third base plate 40, and are used for the coolant to enter and exit the liquid cooling channel; water inlet and outlet holes 71 for the water inlet and outlet nozzles 70 to pass through are provided on the third base plate 40, and the water inlet and outlet holes 71 are staggered with each other.

[0049] In the above embodiment, the bottom plate 1 of the battery case also includes a plurality of water inlet and outlet nozzles 70, and the water inlet and outlet nozzles 70 are connected to the third bottom plate 40, and the water inlet and outlet nozzles 70 are located above the liquid cooling channel, so that they are mainly used for the cooling liquid to enter and exit the liquid cooling channel, so that the cooling liquid can be directly provided to the liquid cooling channel. The cooling liquid enters the liquid cooling channel through the water inlet and outlet nozzles 70, which can effectively absorb and take away the heat generated by the battery 84 in the battery case, thereby improving the cooling effect. In addition, the length of the second support plate 43 located in the liquid cooling channel is less than the length of the liquid cooling channel, so that the second support plate 43 is at a certain distance from the frame 2 at the end away from the water inlet and outlet nozzles 70, and the liquid cooling channel is inverted U-shaped. When the cooling liquid enters the liquid cooling channel from the water inlet and outlet nozzles 70, the direction of the cooling liquid in the liquid cooling channel is inverted U-shaped, which helps to ensure uniform heat dissipation of the entire battery system by the cooling liquid.

[0050] Furthermore, a plurality of water inlet and outlet holes 71 are provided on the third bottom plate 40, wherein the water inlet and outlet holes 71 are mainly used for the water inlet and outlet nozzles 70 to pass through, and the size of the water inlet and outlet holes 71 is slightly larger than the size of the water inlet and outlet nozzles 70, so that the water inlet and outlet nozzles 70 can be more conveniently connected to the water inlet and outlet holes 71, thereby effectively improving the installation efficiency of the water inlet and outlet nozzles 70. Furthermore, a plurality of water inlet and outlet holes 71 are staggeredly arranged on the first support plate 40, so that the water inlet and outlet nozzles 70 provided on the water inlet and outlet holes 71 can be arranged in an evasive manner when connected to external pipelines, so that the limited space in the battery box can be more effectively utilized. The water inlet and outlet nozzles 70 are reasonably arranged on the first support plate 40, so that the intersection and interference between external pipelines can be avoided, and the space of the battery box can be saved to the maximum extent, thereby effectively improving the space utilization rate of the battery box.

[0051] Reference Figure 1-Figure 8 In one embodiment, the base plate 1 further includes a plurality of base plates 1, wherein the plurality of base plates 1 are spliced ​​along their width direction to obtain a base plate assembly 4, and the lateral dimension of the base plate assembly 4 is controlled by increasing or decreasing a plurality of base plates 1.

[0052] In the above embodiment, the base plate 1 also includes multiple base plates 1, which are spliced ​​along their width direction to obtain a base plate assembly 4, so that the user can control the lateral size of the base plate 1 by increasing or decreasing the number of base plates 4 according to the required requirements. Further, the base plate 1 also includes at least one reserved plate 3, and the reserved plate 3 is arranged between the multiple base plates 1 and the frame 2, or is arranged between the multiple base plates 1, so that the lateral size of the entire battery box can be supplemented by the reserved plate 3, so that the battery box can be more flexibly adapted to external installation spaces with different size requirements, providing better customization and flexibility, wherein the multiple base plates 1 are preferably laser welded with the reserved plates 3 and the frame 2, so that the connection between the base plate 1 and the reserved plates 3 and the frame 2 is more firmly.

[0053] Reference Figure 1-Figure 9 In one embodiment, an exhaust confluence channel 80 is provided on the frame 1 at the same end as the exhaust outlet 53 of the exhaust cover plate 50 , and an exhaust confluence port 81 connected to the exhaust outlet 53 is provided on the exhaust confluence channel 80 .

[0054] In the above embodiment, an exhaust confluence channel 80 is provided on the frame 1, and the exhaust confluence channel 80 and the exhaust outlet 53 of the exhaust cover 50 are located at the same end, so that the exhaust confluence channel 80 does not need to occupy too much space when connected to the exhaust outlet 53 in the battery box, thereby improving the space utilization efficiency in the battery box, and an exhaust confluence port 81 connected to the exhaust outlet 53 is provided on the exhaust confluence channel 80, so that when the battery 84 in the battery box has thermal runaway, the battery exhaust is discharged through the exhaust port 81 provided at the bottom. The exhaust hole 54 opened on the exhaust cover plate 50 of the plate 1 enters into the exhaust channel 51 between the exhaust cover plate 50 and the second bottom plate 41, and since the two ends of the bottom plate 1 are in a closed state after the bottom plate 1 and the box frame 2 are welded, the battery exhaust enters the exhaust channel 51 from the exhaust hole 54, and then flows from the exhaust outlet 53 through the exhaust confluence port 81 into the exhaust confluence channel 80. In addition, the battery exhaust is guided to the outside of the battery pack by the explosion-proof valve 85 arranged at the inner end of the exhaust confluence channel 80, thereby realizing the directional eruption of the battery 84.

[0055] Furthermore, the battery pack includes a battery case and a battery management system 83, and the battery 84 is arranged in the accommodating chamber of the battery case and is closely attached to the bottom plate 1 of the battery case, so that the battery 84 is closely attached to the bottom plate 1 and can effectively conduct and dissipate heat, thereby improving the heat dissipation effect of the battery 84, reducing the temperature of the battery 84, and being beneficial to extending the life of the battery pack and improving the performance of the battery pack. In addition, the bottom plate 1 is a layered structure, which can reduce the deformation of the bottom plate 1 caused by external impact, effectively avoid the impact on the battery 84 in the battery case, and improve the protection strength of the lower surface of the battery 84 in contact with the bottom plate 1, thereby ensuring the safety performance of the entire battery pack, and the battery 84 is electrically connected to the battery management system 83, which helps the battery management system 83 to monitor the voltage, current, temperature and other parameters of the battery 84 in real time, as well as control and manage the charging and discharging of the battery pack, thereby ensuring the safe operation and optimal performance of the battery pack.

[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery box, characterized in that: Including base plate and frame; The frame is fixedly connected to the bottom plate, and the bottom plate and the frame together form a receiving space for placing batteries; The bottom plate includes a first bottom plate and a second bottom plate connected to the first bottom plate via a first support plate arranged on the first bottom plate, so that the bottom plate is a layered structure.

2. The battery box according to claim 1, characterized in that: A third bottom plate is arranged at one end of the second bottom plate away from the first bottom plate. The third bottom plate forms a layered structure with the second bottom plate through a second supporting plate, and a liquid cooling channel is arranged between the second bottom plate and the third bottom plate.

3. The battery box according to claim 2, characterized in that: An exhaust channel opening toward the battery is arranged on the second bottom plate and at one side of the liquid cooling channel, and the liquid cooling channel and the exhaust channel are spaced apart from each other by the second supporting plate.

4. The battery box according to claim 3, characterized in that: The first bottom plate, the second bottom plate, the third bottom plate, the first support plate and the second support plate are an integrated piece.

5. The battery case according to claim 3, characterized in that: An exhaust cover plate for covering the exhaust channel is arranged on the exhaust channel, and an exhaust outlet and exhaust holes are arranged on the exhaust cover plate, and the exhaust holes correspond one-to-one to the batteries arranged on the exhaust cover plate.

6. The battery box according to claim 5, characterized in that: A third support plate for supporting the exhaust cover plate is also arranged on the second bottom plate, and the third support plate and the second bottom plate are an integral part.

7. The battery box according to claim 5, characterized in that: A plurality of positioning pins are arranged in the exhaust passage of the second bottom plate, and positioning holes for the positioning pins to pass through are arranged on the exhaust cover plate.

8. The battery box according to claim 2, characterized in that: The bottom plate further comprises a plurality of water inlet and outlet nozzles, and the water inlet and outlet nozzles are connected to the third bottom plate, and are used for the cooling liquid to flow in and out of the liquid cooling channel; The third bottom plate is provided with water inlet and outlet holes for the water inlet and outlet nozzles to pass through, and the water inlet and outlet holes are arranged to be staggered with each other.

9. The battery box according to claim 2, characterized in that: The bottom plates include a plurality of bottom plates, and the plurality of bottom plates are spliced ​​along their width direction to obtain a bottom plate assembly, and the lateral size of the bottom plate assembly is controlled by increasing or reducing the bottom plates.

10. The battery case according to claim 9, characterized in that: The bottom plate further comprises at least one reserved plate, and the reserved plate is arranged between a plurality of the bottom plates, or between the bottom plate and the frame.

11. The battery case according to claim 5, characterized in that: An exhaust confluence channel is arranged on the frame at the same end as the exhaust outlet of the exhaust cover plate, and an exhaust confluence port connected to the exhaust outlet is arranged on the exhaust confluence channel.

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