Battery box body and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery box body and a battery pack. A battery box body in the battery pack comprises a liquid cooling plate, a bottom protection plate and a sealing ring, the liquid cooling plate is provided with a first end face and a second end face opposite to the first end face, and the second end face is convexly provided with a first convex end face and a second convex end face which are connected in the direction away from the first end face; the vertical distance between the first convex end face and the second end face is smaller than the vertical distance between the second convex end face and the second end face, the bottom protection plate is connected with the second convex end face, a containing space is formed between the bottom protection plate and the first convex end face, the sealing ring is clamped in the containing space, and effective sealing between the bottom protection plate and the liquid cooling plate is achieved through the sealing ring. The protection of the sealing ring is improved, the assembly difficulty is reduced, and the assembly efficiency is improved.

Description

Technical Field

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

[0002] With the rise of new energy technologies, electric vehicles have received widespread attention. As a very important component in electric vehicles, the battery pack provides sufficient power for electric vehicles. The battery pack consists of a battery case and multiple batteries, and the multiple batteries are arranged in series and / or in parallel in the battery case. The battery case includes a case frame, a liquid cooling plate and a bottom guard plate arranged in sequence from top to bottom. The battery is accommodated in the accommodation space surrounded by the case frame. The liquid cooling plate is configured to dissipate heat from the battery in the accommodation space, and the bottom guard plate is used to protect the liquid cooling plate.

[0003] In the prior art, there are two main ways to fix the liquid cooling plate and the bottom guard plate in the battery box. The first way is to fix the bottom guard plate and the liquid cooling plate by setting rivet nuts and bolts. Specifically, the liquid cooling plate, the sealing ring and the bottom guard plate are stacked from top to bottom, and the bolts are passed through the bottom guard plate, the sealing ring sandwiched between the bottom guard plate and the liquid cooling plate, and the liquid cooling plate, and then fixed with the rivet nuts. This sealing method of passing through the sealing ring is not only difficult to assemble, but also causes irreversible damage to the sealing ring, affecting the sealing effect of the sealing ring, increasing production costs and reducing production efficiency. In order to improve production efficiency, the second way is to use a blind rivet to pass through the bottom guard plate, the sealing ring sandwiched between the bottom guard plate and the liquid cooling plate, and the liquid cooling plate, and then rivet the bottom guard plate to the box frame. Although the blind rivet has improved efficiency to a certain extent compared with the rivet nuts and bolts, there is no improvement in the installation structure between the liquid cooling plate, the bottom guard plate and the sealing ring, and it is still impossible to improve the protection of the sealing ring and ensure the sealing effect of the sealing ring. Utility Model Content

[0004] The purpose of the utility model is to provide a battery box and a battery pack to achieve stable fixation of the bottom guard plate, the sealing ring liquid cooling plate and the box frame, simplify the assembly difficulty of the battery box, improve the protection of the sealing ring, ensure the sealing effect of the sealing ring, and improve the assembly efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Battery box, including:

[0007] A liquid cooling plate, comprising a first end surface and a second end surface arranged opposite to the first end surface, wherein the second end surface is provided with a first convex end surface and a second convex end surface connected to each other in a direction away from the first end surface, and a vertical distance between the first convex end surface and the second end surface is smaller than a vertical distance between the second convex end surface and the second end surface;

[0008] A bottom guard plate, fixed to the second convex end surface and forming a receiving space between the first convex end surface; and

[0009] A sealing ring is clamped in the accommodating space.

[0010] As an optional solution, an annular stepped protrusion is convexly provided on the circumferential side of the second end face of the liquid cooling plate in a direction away from the first end face, the annular stepped protrusion includes a first annular protrusion and a second annular protrusion connected to each other, the second annular protrusion is sleeved on the outer circumference of the first annular protrusion, the end face of the first annular protrusion away from the second end face is the first convex end face, and the end face of the second annular protrusion away from the second end face is the second convex end face; or

[0011] The second annular protrusion is sleeved on the outer circumference of the first annular protrusion, the end face of the first annular protrusion away from the second end face is the second convex end face, and the end face of the second annular protrusion away from the second end face is the first convex end face.

[0012] As an optional solution, the battery box further includes:

[0013] A fixing piece, wherein the fixing piece is used to connect and fix the bottom guard plate to the second convex end surface.

[0014] As an optional solution, the fixing member includes a connected rivet head and a tail rod, a cavity is opened in the annular step protrusion, the tail rod is passed through the bottom guard plate and the second convex end face and accommodated in the cavity, and the bottom guard plate is riveted and fixed between the rivet head and the second convex end face.

[0015] As an optional solution, a discharge groove communicating with the cavity is provided on the second convex end surface, and the fixing position of the fixing member and the opening position of the discharge groove do not interfere with each other.

[0016] As an optional solution, a plurality of the fixing members are arranged in the battery box, and the plurality of the fixing members are arranged in sequence along the end surface shape of the second convex end surface and connect and fix the bottom guard plate to the second convex end surface;

[0017] And / or, the second convex end surface is provided with a plurality of the discharge grooves along its end surface shape, and the opening position of each of the discharge grooves does not interfere with the fixing position of each of the fixing members.

[0018] As an optional solution, the liquid cooling plate includes an upper snap-fit ​​plate and a lower snap-fit ​​plate that are snap-fitted and fixed, the cooling channel is arranged between the upper snap-fit ​​plate and the lower snap-fit ​​plate, the first end face is arranged at an end of the upper snap-fit ​​plate away from the lower snap-fit ​​plate, and the first convex end face and the second convex end face are protruding on the end face of the lower snap-fit ​​plate away from the upper snap-fit ​​plate in a direction away from the first end face.

[0019] As an optional solution, a vertical distance between the second convex end surface and the first end surface is greater than a vertical distance between an end of the cooling channel away from the first end surface and the first end surface.

[0020] As an optional solution, the battery box further includes:

[0021] The box frame is provided with a housing cavity for accommodating batteries, and a docking groove is provided on an end surface of the box frame close to the first end surface, and the docking groove is configured to dock and fix with the upper buckle plate and the lower buckle plate.

[0022] The battery pack comprises a plurality of batteries and the battery box as described above. After the plurality of batteries are connected in series and / or in parallel, the plurality of batteries are accommodated in the battery box.

[0023] Beneficial effects of the utility model:

[0024] The battery box provided by the utility model is provided with a first convex end face and a second convex end face which are protruding in a direction away from the first end face and are connected on a second end face which is arranged opposite to the first end face of the liquid cooling plate, so that the vertical distance between the first convex end face and the first end face is smaller than the vertical distance between the second convex end face and the first end face, and the bottom plate is connected with the second convex end face so that a accommodating space for clamping a sealing ring is formed between the bottom guard plate and the first convex end face, thereby realizing effective sealing between the bottom guard plate and the liquid cooling plate by using the sealing ring, and achieving the purpose of preventing external liquid or water vapor from entering between the liquid cooling plate and the bottom guard plate and corroding the liquid cooling plate and the bottom guard plate. Compared with the prior art, there is no need to use a locking piece to destroy the sealing ring, thereby improving the protection of the sealing ring, saving production costs, reducing the difficulty of assembling the battery box, and improving assembly efficiency.

[0025] The utility model also provides a battery pack. By applying the above-mentioned battery box, effective sealing between the bottom guard plate and the liquid cooling plate is achieved by using a sealing ring, so as to prevent external liquid or water vapor from entering between the liquid cooling plate and the bottom guard plate and corroding the liquid cooling plate and the bottom guard plate. Compared with the prior art, there is no need to use a locking part to destroy the sealing ring, which improves the protection of the sealing ring, saves production costs, reduces the difficulty of assembling the battery box, and improves assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is one of the structural schematic diagrams of the battery box provided by the embodiment of the utility model;

[0027] Figure 2 This is the second structural schematic diagram of the battery box provided by the embodiment of the utility model;

[0028] Figure 3 It is an exploded view of a battery box provided by an embodiment of the utility model;

[0029] Figure 4 It is a schematic diagram of the structure of a battery box with a hidden bottom guard plate provided in an embodiment of the utility model;

[0030] Figure 5 It is a cross-sectional schematic diagram of a battery box provided by an embodiment of the utility model;

[0031] Figure 6 yes Figure 5 A local enlarged schematic diagram of the middle A;

[0032] Figure 7 yes Figure 4 A local enlarged schematic diagram of point B in the middle.

[0033] In the figure:

[0034] 1000. Battery box;

[0035] 100, bottom guard plate;

[0036] 200, liquid cooling plate; 210, annular stepped protrusion; 211, first annular protrusion; 212, second annular protrusion; 220, discharge trough; 230, flow channel; 240, liquid inlet pipe; 250, liquid outlet pipe; 260, upper buckle plate; 270, lower buckle plate;

[0037] 300, box frame; 310, docking groove; 320, first accommodating hole; 330, second accommodating hole; 340, accommodating cavity;

[0038] 400, sealing ring;

[0039] 500. Fixing parts. DETAILED DESCRIPTION

[0040] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 or an electrical connection; it can be 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 invention can be understood according to specific circumstances.

[0042] 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.

[0043] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] In the prior art, there are two main ways to fix the liquid cooling plate and the bottom guard plate in the battery box. The first way is to fix the bottom guard plate and the liquid cooling plate by setting rivet nuts and bolts. Specifically, the liquid cooling plate, the sealing ring and the bottom guard plate are stacked from top to bottom, and the bolts are passed through the bottom guard plate, the sealing ring sandwiched between the bottom guard plate and the liquid cooling plate, and the liquid cooling plate in sequence, and then fixed with the rivet nuts. In order to ensure the sealing effect of the sealing ring, a large number of rivet nuts and bolts need to be set. This sealing method of penetrating the sealing ring is not only difficult to assemble, but also causes irreversible damage to the sealing ring, affecting the sealing effect of the sealing ring, increasing production costs and reducing production efficiency. In order to improve production efficiency, the second way is to use core-pulling rivets to pass through the bottom guard plate, the sealing ring sandwiched between the bottom guard plate and the liquid cooling plate, and the liquid cooling plate in sequence, and then rivet the bottom guard plate to the box frame. Although blind rivets have improved efficiency to a certain extent compared to rivet nuts and bolts, without improving the installation structure between the liquid cooling plate, the bottom guard plate and the sealing ring, it is still impossible to improve the protection of the sealing ring and ensure the sealing effect of the sealing ring.

[0045] In order to solve the above problems, Figure 1 to Figure 7 As shown, this embodiment provides a battery box 1000. The battery box 1000 includes a bottom guard plate 100, a liquid cooling plate 200 and a sealing ring 400, wherein the liquid cooling plate 200 has a first end face and a second end face arranged opposite to the first end face, the second end face is convexly provided with a first convex end face and a second convex end face connected in a direction away from the first end face, the vertical distance between the first convex end face and the second end face is smaller than the vertical distance between the second convex end face and the second end face, the bottom guard plate 100 is fixed to the second convex end face and forms an accommodation space with the first convex end face, and the sealing ring 400 is clamped in the accommodation space.

[0046] The battery case 1000 is provided with a first convex end face and a second convex end face which are protruding in a direction away from the first end face and are connected to each other on a second end face which is arranged opposite to the first end face of the liquid cooling plate 200, so that the vertical distance between the first convex end face and the first end face is smaller than the vertical distance between the second convex end face and the first end face, and the bottom plate 100 is connected to the second convex end face, so that an accommodating space for clamping the sealing ring 400 is formed between the bottom guard plate 100 and the first convex end face, thereby achieving effective sealing between the bottom guard plate 100 and the liquid cooling plate 200 by using the sealing ring 400, and achieving the purpose of preventing external liquid or water vapor from entering between the liquid cooling plate 200 and the bottom guard plate 100 and corroding the liquid cooling plate 200 and the bottom guard plate 100. Compared with the prior art, there is no need to use a locking piece to destroy the sealing ring 400, thereby improving the protection of the sealing ring 400, saving production costs, reducing the difficulty of assembling the battery case 1000, and improving assembly efficiency.

[0047] It should be noted that the battery box 1000 provided in this embodiment also includes a box frame 300, and a receiving cavity 340 for receiving a battery is provided in the box frame 300, and the box frame 300 is provided on a first end surface, wherein the first end surface is an upper end surface of the liquid cooling plate 200, and the second end surface is a lower end surface of the liquid cooling plate 200. In other embodiments, the liquid cooling plate 200 may be provided not only at the lower end of the box frame 300, but also at the upper end of the box frame 300, and in this case, the bottom guard plate 100 is provided at the upper end of the liquid cooling plate 200 to dissipate heat from above to the battery provided in the receiving cavity 340.

[0048] Specifically, if Figures 4 to 6As shown, an annular stepped protrusion 210 is convexly provided on the circumferential side of the second end face of the liquid cooling plate 200 in a direction away from the first end face, and the annular stepped protrusion 210 includes a first annular protrusion 211 and a second annular protrusion 212 connected to each other, and the second annular protrusion 212 is sleeved on the outer circumference of the first annular protrusion 211, and the end face of the first annular protrusion 211 away from the second end face is a first convex end face, and the end face of the second annular protrusion 212 away from the second end face is a second convex end face. By convexly providing the annular stepped protrusion 210 on the circumferential side of the second end face of the liquid cooling plate 200 in a direction away from the first end face, the second annular protrusion 212 in the annular stepped protrusion 210 is sleeved on the outer circumference of the first annular protrusion 211, and the end face of the first annular protrusion 211 away from the second end face is defined as a first convex end face, and the end face of the second annular protrusion 212 away from the second end face is defined as a second convex end face, the structure is simple and the design is ingenious.

[0049] It should be noted that in other embodiments, on the premise that the second annular protrusion 212 is sleeved on the outer periphery of the first annular protrusion 211, the end face of the first annular protrusion 211 away from the second end face can be set as the second convex end face, and the end face of the second annular protrusion 212 away from the second end face can be set as the first convex end face, and this embodiment does not make specific limitations.

[0050] like Figure 5 and Figure 6 As shown, the liquid cooling plate 200 includes an upper buckle plate 260 and a lower buckle plate 270 that are buckled and fixed, the liquid cooling plate 200 includes an upper buckle plate 260 and a lower buckle plate 270 that are buckled and fixed, the cooling channel 230 is arranged between the upper buckle plate 260 and the lower buckle plate 270, the first end surface is arranged at one end of the upper buckle plate 260 away from the lower buckle plate 270, and the end surface of the lower buckle plate 270 away from the upper buckle plate 260 is convexly provided with a first annular protrusion 211 and a second annular protrusion 212 in a direction away from the first end surface. By setting the liquid cooling plate 200 as an upper buckle plate 260 and a lower buckle plate 270 that are buckled and fixed, it is possible to facilitate the arrangement of the cooling channel 230, the first annular protrusion 211 and the second annular protrusion 212, and reduce the difficulty of producing the liquid cooling plate 200.

[0051] In addition, the cooling channel 230 does not interfere with the first annular protrusion 211 and the second annular protrusion 212. By ensuring that the first annular protrusion 211 and the second annular protrusion 212 do not interfere with the cooling channel 230, the bottom guard plate 100 and the liquid cooling plate 200 can be effectively sealed and fixed without affecting the thermal management performance of the liquid cooling plate 200, thereby ensuring the cooling effect on the battery.

[0052] It should be noted that, in this embodiment, the first end face of the upper buckle plate 260 is a plane to facilitate supporting the battery, and the cooling channel 230, the first annular protrusion 211 and the second annular protrusion 212 are stamped on the lower buckle plate 270, and the first annular protrusion 211 and the second annular protrusion 212 do not interfere with each other. When the upper buckle plate 260 and the lower buckle plate 270 are buckled, the end face of the upper buckle plate 260 away from the first end face and the end face of the lower buckle plate 270 away from the second end face are tightly buckled, thereby realizing the assembly of the liquid cooling plate 200. In other embodiments, a third convex end face can be convexly provided on the end face of the lower buckle plate 270 away from the first end face, and a groove can be opened on the buckling end face where the lower buckle plate 270 and the upper buckle plate 260 are buckled, so that the groove position is perpendicular to the third convex end face. When the lower buckle plate 270 is buckled and fixed with the upper buckle plate 260, the groove formed between the third convex end surface and the upper buckle plate 260 is the cooling channel 230. It can be understood that the processing method of the above cooling channel 230 is only an exemplary description, and the processing method of the cooling channel 230 can be adjusted according to actual needs, and this embodiment does not make a specific limitation.

[0053] In other embodiments, the annular stepped protrusion 210 may also include annular protrusions such as a third annular protrusion, a third annular protrusion, and a fifth annular protrusion, so that a plurality of convex end faces are convexly provided on the second end face of the lower buckle plate 270 in a direction away from the first end face, and a sealing ring 400 may be accommodated in the accommodation space between each convex end face and the bottom guard plate 100, so as to further improve the sealing effect of the bottom guard plate 100 and the liquid cooling plate 200. Or a sealing ring 400 adapted to the accommodation space between the plurality of convex end faces and the bottom guard plate 100 is used, and the sealing ring 400 is accommodated in a plurality of accommodation spaces. It can be understood that the specific shape of the annular stepped protrusion 210 can be adjusted according to actual needs, and this embodiment does not make a specific limitation.

[0054] In addition, in the present embodiment, the bottom guard plate 100 is a flat plate structure, and the vertical distance between the second convex end face and the first end face is greater than the vertical distance between the end of the cooling channel 230 away from the first end face and the first end face. By ensuring that the vertical distance between the second convex end face and the first end face is greater than the vertical distance between the end of the cooling channel 230 away from the first end face and the first end face, the bottom guard plate 100 of the flat plate structure can be abutted and fixed with the second convex end face without interfering with the cooling channel 230. In addition, since the bottom guard plate 100 in the present embodiment is set as a flat plate structure, compared with the method in the prior art that requires a stamping portion in the bottom guard plate 100 to accommodate the cooling channel 230, it does not require mold opening and stamping, which simplifies the processing steps of the bottom guard plate 100 and reduces the processing cost of the bottom guard plate 100.

[0055] In an optional embodiment, the battery box 1000 further includes a fixing member 500, and the fixing member 500 is used to connect and fix the bottom guard plate 100 to the second convex end surface.

[0056] Specifically, if Figure 4 and Figure 7 As shown, in this embodiment, the fixing member 500 includes a connected riveted joint and a tail rod, a cavity is formed in the first annular protrusion 211 and the second annular protrusion 212, the tail rod is passed through the bottom guard plate 100 and the second convex end surface and accommodated in the cavity, and the bottom guard plate 100 is riveted and fixed between the riveted joint and the second convex end surface. By passing the tail rod of the fixing member 500 through the bottom guard plate 100 and the second convex end surface and accommodating it in the cavity, the bottom guard plate 100 is riveted and fixed between the riveted joint and the second convex end surface, thereby achieving stable fixation of the bottom guard plate and the lower buckle plate 270.

[0057] Furthermore, a discharge groove 220 communicating with the cavity is provided on the second convex end surface, and the fixed position of the fixing member 500 does not interfere with the opening position of the discharge groove 220. By providing the discharge groove 220 communicating with the cavity on the second convex end surface, the tail rod in the cavity can be discharged, and the tail rod is prevented from remaining in the cavity and generating abnormal noise. In addition, by ensuring that the fixed position of the fixing member 500 does not interfere with the opening position of the discharge groove 220, the normal use of the fixing member 500 can be ensured.

[0058] Specifically, when it is necessary to remove the bottom guard plate 100 and the liquid cooling plate 200 fixed together, the head of the fixing part 500 can be polished off first, and the tail rod of the fixing part 500 will remain in the cavity. Then the tail rod in the cavity is discharged along the discharge groove 220, or the tail rod is blown out of the discharge groove 220 with an air gun to complete the removal of the bottom guard plate 100 and the liquid cooling plate 200. It should be noted that in this embodiment, the fixing part 500 is a blind rivet, which has a simple structure, is easy to rivet, and has a good anchoring effect. In other embodiments, the fixing part 500 may also be a fan rivet, a tree rivet, a solid rivet, a countersunk rivet or other rivets, which are not specifically limited in this embodiment.

[0059] Furthermore, a plurality of blind rivets are arranged in the battery box 1000, and the plurality of blind rivets are arranged in sequence along the end face shape of the second convex end face. The plurality of blind rivets jointly connect and fix the bottom guard plate 100 to the second convex end face to further improve the fixing effect of the bottom guard plate 100 and the lower buckle plate 270.

[0060] In addition, the second convex end face is provided with a plurality of discharge grooves 220 along its end face shape, and the opening position of each discharge groove 220 does not interfere with the fixing position of each fixing member 500 to ensure the normal riveting fixation of the bottom guard plate 100 and the lower buckle plate 270 by the blind rivet.

[0061] It should be noted that, in this embodiment, a total of 32 blind rivets are used to sequentially connect and fix the bottom guard plate 100 to the second convex end surface along the end surface shape of the second convex end surface, 28 discharge grooves 220 are provided on the second convex end surface, and the 32 blind rivets and the 28 discharge grooves 220 do not interfere with each other. In other embodiments, the specific number of blind rivets and discharge grooves 220 can also be adjusted according to actual needs, as long as they do not interfere with each other, and this embodiment does not make specific limitations.

[0062] In order to improve the fixing effect of the box frame 300 and the liquid cooling plate 200, a docking groove 310 is provided on one end surface of the box frame 300 close to the first end surface, and the docking groove 310 is configured to dock and fix with the upper buckle plate 260 and the lower buckle plate 270. By providing the docking groove 310 matched with the upper buckle plate 260 and the lower buckle plate 270 on the end surface of the box frame 300 close to the first end surface, the box frame 300 and the upper buckle plate 260 and the lower buckle plate 270 can be positioned before fixing, thereby improving the subsequent fixing accuracy. As an optional solution, the liquid cooling plate 200 is provided with a liquid inlet pipe 240 and a liquid outlet pipe 250 respectively communicating with the cooling channel 230, and the box frame 300 is provided with a first accommodating hole 320 and a second accommodating hole 330 respectively, and any one of the first accommodating hole 320 and the second accommodating hole 330 is used to accommodate and fix the liquid inlet pipe 240, and the other is used to accommodate and fix the liquid outlet pipe 250. By arranging the liquid inlet pipe 240 and the liquid outlet pipe 250 respectively communicating with the cooling channel 230 on the liquid cooling plate 200, the flow of the coolant in the cooling channel 230 can be facilitated, and by arranging the first accommodating hole 320 and the second accommodating hole 330 respectively used to accommodate the liquid inlet pipe 240 and the liquid outlet pipe 250 on the box frame 300, the liquid inlet pipe 240 and the liquid outlet pipe 250 can be stably fixed on the box frame 300. It should be noted that, in this embodiment, the first receiving hole 320 is used to receive the fixed liquid inlet pipe 240, and the second receiving hole 330 is used to receive the fixed liquid outlet pipe 250. In other embodiments, the first receiving hole 320 may receive the fixed liquid outlet pipe 250, and the second receiving hole 330 may receive the fixed liquid inlet pipe 240, which is not specifically limited in this embodiment.

[0063] This embodiment further provides a battery pack, which includes a plurality of batteries and the battery box 1000 , wherein the plurality of batteries are connected in series and / or in parallel, and the plurality of batteries are accommodated in the accommodation cavity 340 of the battery box 1000 .

[0064] By applying the above-mentioned battery box 1000, the battery pack realizes the effective sealing between the bottom guard plate 100 and the liquid cooling plate 200 by using the sealing ring 400, so as to prevent external liquid or water vapor from entering between the liquid cooling plate 200 and the bottom guard plate 100 and corroding the liquid cooling plate 200 and the bottom guard plate 100. Compared with the prior art, there is no need to use a locking part to destroy the sealing ring 400, thereby improving the protection of the sealing ring 400, saving production costs, reducing the difficulty of assembling the battery box 1000, and improving assembly efficiency.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery box, characterized in that: include: A liquid cooling plate (200) comprising a first end face and a second end face arranged opposite to the first end face, the second end face being provided with a first convex end face and a second convex end face connected to each other in a direction away from the first end face, and a vertical distance between the first convex end face and the second end face being smaller than a vertical distance between the second convex end face and the second end face; A bottom guard plate (100) connected to the second convex end surface and forming a receiving space with the first convex end surface; and A sealing ring (400), wherein the sealing ring (400) is clamped in the accommodating space.

2. The battery box according to claim 1, characterized in that: An annular stepped protrusion (210) is convexly provided on the circumferential side of the second end face of the liquid cooling plate (200) in a direction away from the first end face, the annular stepped protrusion (210) comprises a first annular protrusion (211) and a second annular protrusion (212) connected to each other, the second annular protrusion (212) is sleeved on the outer circumference of the first annular protrusion (211), the end face of the first annular protrusion (211) away from the second end face is the first convex end face, and the end face of the second annular protrusion (212) away from the second end face is the second convex end face; or The second annular protrusion (212) is sleeved on the outer circumference of the first annular protrusion (211); the end face of the first annular protrusion (211) away from the second end face is the second convex end face; and the end face of the second annular protrusion (212) away from the second end face is the first convex end face.

3. The battery box according to claim 2, characterized in that: The battery box also includes: A fixing member (500), wherein the fixing member (500) is used to connect and fix the bottom guard plate (100) to the second convex end surface.

4. The battery box according to claim 3, characterized in that: The fixing member (500) comprises a connected rivet joint and a tail rod, a cavity is provided in the annular stepped protrusion (210), the tail rod is passed through the bottom guard plate (100) and the second convex end surface and is accommodated in the cavity, and the bottom guard plate (100) is riveted and fixed between the rivet joint and the second convex end surface.

5. The battery box according to claim 4, characterized in that: The second convex end surface is provided with a discharge groove (220) which is in communication with the cavity, and the fixing position of the fixing member (500) and the opening position of the discharge groove (220) do not interfere with each other.

6. The battery case according to claim 5, characterized in that: A plurality of the fixing members (500) are arranged in the battery box, and the plurality of the fixing members (500) are arranged in sequence along the end surface shape of the second convex end surface and connect and fix the bottom guard plate (100) to the second convex end surface; And / or, the second convex end surface is provided with a plurality of discharge grooves (220) along its end surface shape, and the opening position of each discharge groove (220) does not interfere with the fixing position of each fixing member (500).

7. The battery case according to any one of claims 1 to 6, characterized in that: The liquid cooling plate (200) comprises an upper snap-fit ​​plate (260) and a lower snap-fit ​​plate (270) which are snap-fitted and fixed, the cooling channel (230) is arranged between the upper snap-fit ​​plate (260) and the lower snap-fit ​​plate (270), the first end surface is arranged at one end of the upper snap-fit ​​plate (260) away from the lower snap-fit ​​plate (270), and the first convex end surface and the second convex end surface are convexly provided on the end surface of the lower snap-fit ​​plate (270) away from the upper snap-fit ​​plate (260) in a direction away from the first end surface.

8. The battery case according to claim 7, characterized in that: The vertical distance between the second convex end surface and the first end surface is greater than the vertical distance between the first end surface and an end of the cooling channel (230) away from the first end surface.

9. The battery case according to claim 7, characterized in that: The battery box also includes: The box frame (300) is provided with a receiving cavity (340) for receiving a battery, and a docking groove (310) is provided on an end surface of the box frame (300) close to the first end surface, and the docking groove (310) is configured to dock and fix with the upper buckle plate (260) and the lower buckle plate (270).

10. A battery pack, characterized in that: It comprises a plurality of batteries and a battery box as claimed in any one of claims 1 to 9, wherein after the plurality of batteries are connected in series and / or in parallel, the plurality of batteries are accommodated in the battery box.

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