Battery box

Abstract

The invention discloses a battery box, which comprises a battery box main body, the battery box main body comprises a frame body group, a liquid cooling plate and an upper cover plate, the liquid cooling plate is configured at the bottom of the frame body group through a first welding assembly, and the upper cover plate is configured at the top of the frame body group through a second welding assembly. The invention provides a battery box which comprises a battery box main body, the battery box main body comprises a frame body group, a liquid cooling plate and an upper cover plate, specifically, the liquid cooling plate is mounted at the bottom of the frame body group through a first welding assembly, and the upper cover plate is mounted at the top of the frame body group through a second welding assembly; therefore, a sealed cavity is formed in the battery box main body, and the sealing performance is realized. When the first welding assembly is connected with the bottom of the frame body set, the bottom of the frame body set does not need to be punched, and therefore the risk that in the prior art, when punching is conducted on the frame body set, airtight failure occurs or airtight failure occurs in an FDS thread gap is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery boxes, and more specifically, to a battery box. Background Art

[0002] The existing battery box (steel structure, aluminum alloy structure, steel-aluminum hybrid structure) upper and lower cover sealing connection methods on the market mainly adopt screw connection (rivet nut + bolt fastening), FDS (flow drill screw connection + double sealant), FSW (friction stir welding), core pull riveting and other connection processes. The above connection methods often have poor airtightness.

[0003] As one of the core components of new energy vehicles, the battery mainly provides driving energy for the vehicle. Its functional technical indicators need to meet the following basic national standards: ① GB 38031-2020 (Safety requirements for power batteries for electric vehicles) ② GB 18384-2020 (Safety requirements for electric vehicles). As the main frame of the battery, the battery box needs to ensure mechanical strength and airtightness. The inner cavity of the battery tray needs to meet IP67 requirements.

[0004] As a major safety component, if the battery fails to seal properly, it will directly lead to safety accidents and even endanger life. The upper and lower sealing connection processes of battery boxes currently used in the market (screw connection, FDS, FSW, core-pulling rivets) all have more or less risks of airtight failure, and the process cost is also relatively high.

[0005] 1) Screw connection process: Before riveting, the frame assembly needs to be drilled first, the rivet nut adopts a blind hole structure, and the rivet nut flange surface (rivet joint surface with the frame) needs to be resistant to glue drop, which increases the process cost and the risk of airtight failure occurs at the matching position of the rivet nut and the frame.

[0006] 2) FDS connection process (aluminum alloy frame structure): After the FDS connection is completed, sealant needs to be added for sealing. The risk of airtight failure occurs in the FDS thread gap.

[0007] 3) FSW connection process (aluminum alloy frame structure): high investment cost, low production efficiency, high requirements for overlap or butt flatness, and poor airtightness easily occurs in poor connection gap positions.

[0008] 4) Blind rivet connection process (rolled steel frame structure, aluminum alloy frame structure): Before riveting, the frame assembly needs to be opened first, and the flange surface of the blind rivet (the rivet joint surface with the frame) needs to be resistant to glue falling, which increases the process cost. The risk of airtight failure occurs at the matching position of the blind rivet flange surface and the frame and the empty tube position inside the blind rivet.

[0009] In view of the risk of airtight failure in the current connection process in the market, a battery box is proposed to at least partially solve the problems existing in the prior art. Summary of the invention

[0010] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0011] In order to at least partially solve the above problems, the present invention provides a battery box, including: a battery box main body, which includes a frame body group, a liquid cooling plate, and an upper cover plate, wherein the liquid cooling plate is configured at the bottom of the frame body group through a first welding assembly, and the upper cover plate is configured at the top of the frame body group through a second welding assembly.

[0012] According to the battery box of an embodiment of the present invention, the first welding assembly includes a welding rod, a welding seat, and a fixing part, the welding seat is arranged at the upper end of the welding rod, the upper end of the welding rod is welded to the bottom of the frame body group, the liquid cooling plate is connected to the welding seat, and the fixing part is passed through the welding rod and abuts against the liquid cooling plate.

[0013] The battery box according to the embodiment of the present invention further includes: an airtight layer, wherein the airtight layer is arranged between the liquid cooling plate and the bottom of the frame body group, and the welding seat is penetrated in the airtight layer.

[0014] According to the battery box of an embodiment of the present invention, a bottom protective plate is arranged at the bottom of the liquid cooling plate, an inner cavity is provided between the bottom protective plate and the liquid cooling plate, the liquid cooling plate comprises a substrate and a flow channel plate, the inner cavity is further provided with an inner protective plate, and the flow channel plate is located above the inner protective plate, the flow channel plate has a plurality of flow channel recesses, and a cooling channel is provided between the plurality of flow channel recesses and the liquid cooling plate, and a coolant is provided in the cooling channel.

[0015] According to the battery box of the embodiment of the present invention, the battery box body further has a control cabin, and the control cabin is equipped with a first liquid inlet pipe and a first liquid outlet pipe connected to the cooling channel, and the first liquid inlet pipe and the first liquid outlet pipe are connected to an external circulation pump.

[0016] According to the battery box of the embodiment of the present invention, a battery inner frame is further configured in the battery box body, and the battery inner frame divides the battery box body into a control compartment and two battery compartments.

[0017] According to the battery box of the embodiment of the present invention, the battery inner frame includes two first inner beam frames and a second inner beam frame, the second inner beam frame is arranged between the two first inner beam frames, and a control cabin is between one of the first inner beam frames and the frame body group.

[0018] According to the battery box of the embodiment of the present invention, two connector assemblies are further configured on the surface frame of the frame body group, one of the connector assemblies is used to connect the first liquid inlet pipe with the external circulation pump, and the other connector assembly is used to connect the first liquid outlet pipe with the external circulation pump.

[0019] According to the battery box of the embodiment of the present invention, the joint assembly includes an inner joint section and a leak-proof insert, the leak-proof insert is arranged on the inner joint section, and the leak-proof insert is provided with an outer leak-proof cap, an inner leak-proof cap, a rotating mechanism, and an inner push-up mechanism, the outer leak-proof cap presses against the outer wall of the top surface frame and wraps the rotating mechanism, the rotating mechanism is movably connected to the inner push-up mechanism, so that the inner push-up mechanism presses against and is fixed on the two inner walls of the surface frame, and the inner leak-proof cap is arranged on the inner end of the leak-proof insert and presses against the inner wall of the top surface frame.

[0020] According to the battery box of the embodiment of the present invention, the outer leak-proof cap includes an outer top plate, an inner top plate, and an intermediate wrapping tube. The outer top plate is arranged on the outer end of the leak-proof insert tube through a fastening rod. The intermediate wrapping tube is arranged between the outer top plate and the inner top plate, and is sleeved on the leak-proof insert tube to wrap the rotating mechanism. A plurality of first spring bodies are also arranged between the outer top plate and the inner top plate, so that the inner top plate presses against the outer wall of the surface frame.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention provides a battery box, which includes a battery box body, which includes a frame body group, a liquid cooling plate, and an upper cover plate. Specifically, the liquid cooling plate is installed at the bottom of the frame body group through a first welding assembly, and the upper cover plate is installed at the top of the frame body group through a second welding assembly, so that a closed cavity is formed inside the battery box body, thereby achieving sealing performance. When the first welding assembly is connected to the bottom of the frame body group, it is not necessary to punch a hole at the bottom of the frame body group, thereby avoiding the risk of airtight failure caused by punching a hole in the frame body group in the prior art, or airtight failure in the FDS thread gap.

[0022] The battery box described in the present invention, other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 The internal structure of the battery box body in the present invention is shown in FIG. Figure 1 .

[0024] Figure 2 It is a partial structural schematic diagram of the present invention.

[0025] Figure 3 It is a partial structural schematic diagram of the liquid cooling plate in the present invention.

[0026] Figure 4 The internal structure of the battery box body in the present invention is shown in FIG. Figure 2 .

[0027] Figure 5 It is a structural schematic diagram of the joint assembly in the present invention.

[0028] Figure 6 The internal structure of the joint assembly of the present invention is shown in FIG. Figure 1 .

[0029] Figure 7 The internal structure of the joint assembly of the present invention is shown in FIG. Figure 2 .

[0030] Figure 8 It is a partial structural schematic diagram of the leak-proof insert tube in the present invention.

[0031] Fig. 9 For the present invention Figure 7 Schematic diagram of the enlarged structure of the part A in the middle.

[0032] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure of the part B in the middle.

[0033] Fig.11 It is a structural schematic diagram of the inner moving frame block in the present invention.

[0034] Fig.12 It is a schematic diagram of the internal structure of the composite telescopic mechanism in the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0036] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0037] like Figure 1As shown, the present invention provides a battery box, including: a battery box main body 100, which includes a frame body group 1, a liquid cooling plate 2, and an upper cover plate 3. Specifically, the liquid cooling plate 2 is installed on the bottom of the frame body group 1 through a first welding assembly 4, and the upper cover plate 3 is installed on the top of the frame body group 1 through a second welding assembly, so that a closed cavity is formed inside the battery box main body 100, thereby achieving airtightness, so as to facilitate the placement of a battery pack unit (not shown) in the battery box main body 100.

[0038] When the first welding assembly 4 is connected to the bottom of the frame body group 1, there is no need to drill a hole at the bottom of the frame body group 1, thereby avoiding the risk of airtight failure caused by drilling a hole in the frame body group 1 in the prior art, or airtight failure in the FDS thread gap.

[0039] Exemplary First Welding Assembly like Figure 2 As shown, further, in some embodiments of the present invention, a specific structure of the first welding assembly 4 is provided, wherein the first welding assembly 4 includes a welding rod 41, a welding seat 42, and a fixing member 43, wherein the welding seat 42 is mounted on the upper end of the welding rod 41, and is mounted on the bottom of the frame body group 1 by welding through the welding rod 41 and the welding seat 42, and then the liquid cooling plate 2 is penetrated on the welding rod 41 and abutted to be connected with the welding seat 42, and then the fixing member 43 is penetrated on the welding rod 41 and abutted against the liquid cooling plate 2. Here, the welding rod 41 is set as a conical stud, and the fixing member 43 is set as a compression nut, and the two are welded to the bottom of the frame body group 1 to achieve the sealing effect of the battery box body 100.

[0040] Furthermore, some embodiments of the present invention also have an airtight layer 11, where the airtight layer 11 is installed between the bottom of the liquid cooling plate 2 and the frame body group 1, so as to achieve the sealing of the liquid cooling plate 2 and the frame body group 1, and the airtight layer 11 has a mounting hole corresponding to the welding seat 42, so that the welding seat 42 is penetrated in the airtight layer 11, thereby further achieving the sealing of multiple welding seats 42.

[0041] Example underbody guard like Figure 3As shown, further, in some embodiments of the present invention, a bottom guard plate 20 is installed at the bottom of the above-mentioned liquid cooling plate 2, so that an inner cavity 201 is provided between the bottom guard plate 20 and the liquid cooling plate 2, and the liquid cooling plate 2 includes a substrate 21 and a flow channel plate 22. The flow channel plate 22 is installed at the bottom of the substrate 21 and is located in the inner cavity 201. An inner guard plate 23 is also installed in the inner cavity 201, and the flow channel plate 22 is located above the inner guard plate 23, so that the inner guard plate 23 is located between the flow channel plate 22 and the bottom guard plate 20. Since the flow channel plate 22 and the bottom guard plate 20 are both made of steel and the inner guard plate 23 is made of foam, the bottom guard plate 20 is prevented from directly contacting the flow channel plate 22 and causing scratches, and abnormal noise is reduced.

[0042] Furthermore, the flow channel plate 22 has a plurality of flow channel recesses 24 that are interconnected, and a cooling channel 25 is provided between the plurality of flow channel recesses 24 and the liquid cooling plate 2, and the cooling channel 25 has a coolant in it; Among them, by stamping a plurality of flow channel recesses 24 on the flow channel plate 22, and then sealingly mounting the flow channel plate 22 to the bottom of the substrate 21 by brazing, a cooling channel 25 is formed between the flow channel recesses 24 and the liquid cooling plate 2, so that the heat generated by the battery pack unit (not shown) in the battery box body 100 can be taken away by pumping in circulating coolant, thereby achieving a heat dissipation effect.

[0043] like Figure 4 As shown, further, a control cabin 101 is also provided in the battery box body 100, and some control components are installed in the control cabin 101, which is convenient for charging and power generation management of the battery pack unit; at the same time, a first liquid inlet pipe 28 and a first liquid outlet pipe 29 are also installed, which are connected to the cooling channel 25 through the first liquid inlet pipe 28 and the first liquid outlet pipe 29, and the first liquid inlet pipe 28 and the first liquid outlet pipe 29 are connected to the external circulation pump. The hidden design of the first liquid inlet pipe 28 and the first liquid outlet pipe 29 can prevent the coolant from leaking and affecting the heat dissipation effect.

[0044] Exemplary battery inner frame like Figure 4 As shown, further, in some embodiments of the present invention, a battery inner frame 30 is also installed in the battery box body 100, and the battery inner frame 30 is used to divide the battery box body 100 into a control cabin 101 and two battery cabins 102. Specifically, the battery inner frame 30 of the above structure includes two first inner beam frames 301 and a second inner beam frame 302, wherein the second inner beam frame 302 is installed between the two first inner beam frames 301, and the control cabin 101 is located between one of the first inner beam frames 301 and the frame body group 1. The battery inner frame 30 facilitates the installation of the battery pack unit (not shown) inside the battery box body 100, greatly improving the efficiency of the use of the internal space.

[0045] Exemplary Joint Assemblies like Figure 5-Figure 12 As shown, further, in some embodiments of the present invention, two joint assemblies 5 are also installed on the face frame body 10 of the frame body group 1, wherein one of the joint assemblies 5 is used to connect the first liquid inlet pipe 28 with the external circulation pump, and the other joint assembly 5 is used to connect the first liquid outlet pipe 29 with the external circulation pump, so as to realize the circulation connection between the external circulation pump and the first liquid inlet pipe 28 and the first liquid outlet pipe 29, wherein a corresponding internal cooling pipe is also provided between the first liquid inlet pipe 28 and the first liquid outlet pipe 29 to realize the connection between the two and the joint assembly 5, the joint assembly 5 has good airtight protection, and the joint assembly 5 can also be easily opened for maintenance, and after regular maintenance of parts and components, it can prevent external water from entering the battery box main body 100 when the car is wading.

[0046] like Figure 5 As shown, specifically, the joint assembly 5 of the structure includes an inner joint section 51 and a leak-proof insert 52, wherein the leak-proof insert 52 is installed in the face frame 10 of the frame body assembly 1 (the face frame 10 has a corresponding installation hole), and the leak-proof insert 52 is installed on the inner joint section 51, and the leak-proof insert 52 is also installed with an outer leak-proof cap 53, an inner leak-proof cap 54, a rotating mechanism 55, and an inner push-up mechanism 56, wherein the rotating mechanism 55 and the inner push-up mechanism 56 are connected to each other. 6 is movably connected, so that the inner push mechanism 56 is fixed on the two inner walls of the face frame 10, and the outer leak-proof cap 53 is pressed against the outer wall of the face frame 10 and wraps the rotating mechanism 55, and the inner leak-proof cap 54 is installed on the inner end of the leak-proof insert 52 and pressed against the inner wall of the face frame 10, so that the outer leak-proof cap 53 and the inner leak-proof cap 54 are pressed against the face frame 10, so as to achieve airtight fixation and prevent external water from entering the battery box main body 100.

[0047] Exemplary outer leak-proof cap like Figure 6 As shown, further, some embodiments of the present invention provide a specific structure of the above-mentioned external leak-proof cap 53, where the external leak-proof cap 53 of the structure includes an outer top plate 531, an inner top plate 532, and an intermediate wrapping tube 533, where the outer top plate 531 is installed on the outer end of the leak-proof insert tube 52 through a fastening rod 534, the outer end of the leak-proof insert tube 52 has a fastening screw groove 520 corresponding to the fastening rod 534, and the intermediate wrapping tube 533 is installed between the outer top plate 531 and the inner top plate 532, and is sleeved on the leak-proof insert tube 52 to wrap the rotating mechanism 55, further, a plurality of first spring bodies 535 are also arranged between the outer top plate 531 and the inner top plate 532, where the first spring body 535 is a compression spring, and the plurality of first spring bodies 535 can provide a balanced pushing force for the inner top plate 532, so that the inner top plate 532 pushes against the outer wall of the surface frame 10, thereby preventing airtightness failure and external water from entering the battery box body 100.

[0048] It is understandable that the inner anti-leakage cap 54 can adopt the same structure as the outer anti-leakage cap 53, so it will not be listed and described in detail.

[0049] Exemplary Rotation Mechanisms like Figure 5-Figure 6 As shown, further, some embodiments of the present invention provide a specific structure of the above-mentioned rotating mechanism 55, where the rotating mechanism 55 of the structure includes a first rotating circle 551 and a second rotating circle 552, and the first rotating circle 551 and the second rotating circle 552 are both rotatably mounted on the outer wall of the leak-proof plug tube 52, wherein the first rotating circle 551 is rotatably mounted in the threaded area 521 of the leak-proof plug tube 52, and the second rotating circle 552 is rotatably on the leak-proof plug tube 52 and located on the inner side of the threaded area 521, and a plurality of first inner grooves 522 are opened in the threaded area 521, and a second inner groove 523 corresponding to the first inner groove 522 and internally connected is opened in the middle of the outer wall of the leak-proof plug tube 52, and the inner push mechanism 56 is installed in the first inner groove 522 and the second inner groove 523, and is movably connected to the first rotating circle 551 and the second rotating circle 552 respectively.

[0050] Therefore, after the leak-proof insert 52 is inserted and installed in the corresponding installation hole (not shown) in the face frame 10, the operator can operate the multiple first protruding rods 5511 on the first rotating circle 551, thereby facilitating the first rotating circle 551 to rotate in the threaded area 521 and drive the inner push-up mechanism 56 to move, and then operate the multiple second protruding rods 5521 on the second rotating circle 552. Under the rotation of the second rotating circle 552, the inner push-up mechanism 56 is fixed to the face frame 10, thereby realizing the fixed installation of the leak-proof insert 52.

[0051] Exemplary internal ejection mechanism like Figure 7-Figure 11As shown, further, some embodiments of the present invention provide a specific structure of the above-mentioned inner push mechanism 56, wherein the inner push mechanism 56 of the structure includes an L-shaped inner push rod 57 and an inner lifting assembly 58, wherein the L-shaped inner push rod 57 is movably installed in the first inner groove 522 and the second inner groove 523, and then the first rotating circle 551 can be pushed against the L-shaped inner push rod 57, and by rotating the first rotating circle 551, the first rotating circle 551 can push the L-shaped inner push rod 57 in the first inner groove 522 to move into the second inner groove 523, and a wedge block 572 is provided on the inner end of the L-shaped inner push rod 57, so that the wedge block 572 acts on the inner lifting assembly 58, and a second spring body 571 is provided on the L-shaped inner push rod 57, and the second spring body 571 makes the L The movement of the inner push rod 57 is more stable, and the inner lifting component 58 is movably installed in the second inner groove 523 through the seat plate 524, so that the inner lifting component 58 moves to the outside of the second inner groove 523, so that the inner support guide plate 59 in the inner lifting component 58 is close to the two inner walls of the face frame 10, and then the two inner moving frame blocks 591 on the inner support guide plate 59 are movably driven to press against the two inner walls of the top face frame 10 under the action of the second rotating circle 552. Here, the inner moving frame blocks 591 are also provided with a bonding layer 594. The bonding layer 594 makes the connection between the inner moving frame blocks 591 and the inner wall of the face frame 10 more secure, thereby realizing the fixed installation of the above-mentioned inner pushing mechanism 56 on the face frame 10, and also facilitating the subsequent maintenance or replacement of parts by opening the inner pushing mechanism 56.

[0052] Furthermore, a composite telescopic mechanism is also provided in the inner lifting component 58, and a wedge-shaped surface 580 corresponding to the above-mentioned wedge block 572 is provided at the bottom of the composite telescopic mechanism, so that the composite telescopic mechanism can push the inner support guide plate 59 outward; a plurality of slideways 590 are provided in the inner support guide plate 59, and two inner movable frame blocks 591 can be movably mounted on the inner lifting component 58 through a screw 592, and the screw 592 is rotatably connected to the second rotating circle 552 through a knob 593, wherein the screw 592 is passed through the middle slideway 590, and the screw 592 has two threaded sections in opposite directions, so as to realize the mutual pulling in or away from each other between the two inner movable frame blocks 591, so that the inner movable frame blocks 591 are pressed against the inner wall of the face frame 10, wherein a spacer block 595 is also provided on the inner support guide plate 59, which is used to prevent the two inner movable frame blocks 591 from being too close to each other and causing thread slippage on the screw 592.

[0053] Exemplary composite telescopic mechanism like Fig.12As shown, further, some embodiments of the present invention provide a specific structure of the above-mentioned composite telescopic mechanism, where the composite telescopic mechanism of the structure includes a third spring body 581, a first T-shaped rod 582, a first telescopic cylinder 583, a second T-shaped rod 584, a second telescopic cylinder 585, and a fourth spring body 586. Specifically, the first T-shaped rod 582 is invertedly installed in the first telescopic cylinder 583, and the bottom of the first telescopic cylinder 583 has the above-mentioned wedge surface 580, and the third spring body 581 is installed on the first T-shaped rod 582 and is located between the inner lifting component 58 and the seat plate 524. Further, the second T-shaped rod 584, the second telescopic cylinder 585, and the fourth spring body 586 are located in the first telescopic cylinder 583. , and the second T-bar 584 is invertedly installed in the second telescopic cylinder 585, and the fourth spring body 586 is sleeved on the second T-bar 584 and the second telescopic cylinder 585. Here, the second T-bar 584 is connected to the first T-bar 582, so after the wedge block 572 hits the wedge surface 580, the entire composite telescopic mechanism pushes the inner support guide plate 59 outward from the second inner groove 523, and then the composite telescopic mechanism continuously provides an outward thrust to the inner support guide plate 59 under the action of the third spring body 581 and the fourth spring body 586, and here the inner support guide plate 59 hits the mounting hole of the face frame 10, and here the inner support guide plate 59 also has an anti-distortion rod 596 penetrated on the seat plate 524, so that the inner support guide plate 59 moves outward smoothly.

[0054] In the description of the present invention, it is to 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”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A battery box, characterized in that: include: A battery box body (100) comprises a frame body group (1), a liquid cooling plate (2), and an upper cover plate (3), wherein the liquid cooling plate (2) is arranged on the bottom of the frame body group (1) via a first welding assembly (4), and the upper cover plate (3) is arranged on the top of the frame body group (1) via a second welding assembly; The battery box body (100) further comprises a control cabin (101), wherein the control cabin (101) is provided with a first liquid inlet pipe (28) and a first liquid outlet pipe (29) which are in communication with the cooling channel (26), and the first liquid inlet pipe (28) and the first liquid outlet pipe (29) are in communication with an external circulation pump. The face frame (10) of the frame body group (1) is further provided with two joint assemblies (5), wherein one of the joint assemblies (5) is used for connecting the first liquid inlet pipe (28) to the external circulation pump, and the other of the joint assemblies (5) is used for connecting the first liquid outlet pipe (29) to the external circulation pump.

2. A battery box according to claim 1, characterized in that: The first welding assembly (4) comprises a welding rod (41), a welding seat (42), and a fixing piece (43); the welding seat (42) is arranged at the upper end of the welding rod (41); the upper end of the welding rod (41) is welded to the bottom of the frame body assembly (1); the liquid cooling plate (2) is connected to the welding seat (42); and the fixing piece (43) is passed through the welding rod (41) and abuts against the liquid cooling plate (2).

3. A battery box according to claim 2, characterized in that: Also includes: An airtight layer (11), the airtight layer (11) being arranged between the liquid cooling plate (2) and the bottom of the frame body group (1), and the welding seat (42) being arranged through the airtight layer (11).

4. A battery box according to claim 1, characterized in that: The bottom of the liquid cooling plate (2) is provided with a bottom guard plate (20), an inner cavity (201) is provided between the bottom guard plate (20) and the liquid cooling plate (2), the liquid cooling plate (2) comprises a base plate (21) and a flow channel plate (22), the inner cavity (201) is further provided with an inner guard plate (24), and the flow channel plate (22) is located above the inner guard plate (24), the flow channel plate (22) has a plurality of flow channel recesses (25), and a cooling channel (26) is provided between the plurality of flow channel recesses (25) and the liquid cooling plate (2), and the cooling channel (26) has a cooling liquid in it.

5. A battery box according to claim 1, characterized in that: A battery inner frame (30) is also arranged inside the battery box body (100), and the battery inner frame (30) divides the battery box body (100) into a control compartment (101) and two battery compartments (102).

6. A battery box according to claim 5, characterized in that: The battery inner frame (30) comprises two first inner beam frames (301) and a second inner beam frame (302); the second inner beam frame (302) is arranged between the two first inner beam frames (301); and a control cabin (101) is provided between one of the first inner beam frames (301) and the frame body group (1).

7. A battery box according to claim 1, characterized in that: The joint assembly (5) comprises an inner joint section (51) and a leak-proof insert (52); the leak-proof insert (52) is arranged on the inner joint section (51); and the leak-proof insert (52) is provided with an outer leak-proof cap (53), an inner leak-proof cap (54), a rotating mechanism (55), and an inner push-up mechanism (56); the outer leak-proof cap (53) abuts against the outer wall of the surface frame (10) and wraps around the rotating mechanism (55); the rotating mechanism (55) is movably connected to the inner push-up mechanism (56) so that the inner push-up mechanism (56) abuts against the two inner walls of the surface frame (10); and the inner leak-proof cap (54) is arranged on the inner end of the leak-proof insert (52) and abuts against the inner wall of the surface frame (10).

8. A battery box according to claim 7, characterized in that: The outer leak-proof cap (53) comprises an outer top plate (531), an inner top plate (532), and an intermediate wrapping tube (533); the outer top plate (531) is arranged on the outer end of the leak-proof insert tube (52) via a fastening rod (534); the intermediate wrapping tube (533) is arranged between the outer top plate (531) and the inner top plate (532), and is sleeved on the leak-proof insert tube (52) to wrap the rotating mechanism (55); and a plurality of first spring bodies (535) are further arranged between the outer top plate (531) and the inner top plate (532), so that the inner top plate (532) abuts against the outer wall of the surface frame (10).

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