Battery box body, battery system and electric vehicle

Abstract

The utility model relates to a power battery, in particular to a battery box body, a battery system and an electric vehicle, and the battery box body comprises a bottom plate, a side plate and an end plate, the side plates comprise inner and outer vertical plates, upper and lower mounting plates and a bottom plate connecting seat; inner reinforcing ribs are arranged in the abdominal cavity; the mounting planes of the upper and lower mounting plates are arranged in parallel and are provided with a plurality of upper and lower paired coaxial mounting holes; mounting process holes are formed in the outer side surfaces of the outer vertical plates; the end plate comprises a web plate, upper and lower end mounting plates and a bottom plate connecting seat; the mounting planes of the mounting plates at the upper part and the lower part of the end plate are arranged in parallel and are provided with a plurality of vertical paired coaxial mounting holes; the side plates and the end plates are sequentially welded end to end; sealing grooves which are sequentially connected end to end are formed in the upper mounting surface; and the bottom plate is fixedly connected with the bottom plate connecting seat. The side plates of the battery box body are made of extruded aluminum profiles, so that the weight of the battery box body can be effectively reduced, and the energy density of a battery system is improved.

Description

Technical Field

[0001] The utility model relates to a power battery, and more specifically, to a battery box body, a battery system and an electric vehicle. Background Art

[0002] Electric vehicles such as electric construction machinery have characteristics such as high power consumption and long continuous operation time, so the battery capacity they require is large. To meet the power consumption requirements of electric vehicles, a multi-layer electric box integrated battery system is often adopted thereon. In this battery system, the electric box is formed by stacking multiple layers of battery box bodies, and multiple groups of battery modules are installed in each layer of battery box body.

[0003] Each layer of battery box body in the battery system supports the upper layer of electric box. Each layer of battery module is relatively heavy itself, and at the same time, the shaking of the vehicle body during the operation of the electric vehicle drives the shaking of the battery system, which requires a relatively high strength for the battery box body. To meet its strength requirements, the battery box body of the existing battery system is usually made of thick steel plates welded together, which results in a heavy mass, a bulky structure and a low energy density of the battery system. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a battery box body, a battery system and an electric vehicle, so as to reduce the weight of the battery box body.

[0005] The technical solution for the utility model to achieve its purpose is: a battery box body, which includes: a bottom plate, two side plates and two end plates made of extruded aluminum profiles.

[0006] The side plate includes an inner vertical plate and an outer vertical plate arranged in parallel, mounting plates located at the upper and lower parts of the inner and outer vertical plates and forming a rectangular abdominal cavity with the inner and outer vertical plates, and a bottom plate connection seat located at the bottom of the outer side of the inner vertical plate for fixedly connecting the bottom plate; there are multiple inner reinforcing ribs connecting the inner and outer vertical plates in the abdominal cavity; the mounting planes of the mounting plates at the upper and lower parts of the side plate are arranged in parallel and are provided with multiple pairs of upper and lower coaxial mounting holes; mounting process holes adapted to the mounting holes are arranged at positions on the outer side surface of the outer vertical plate adjacent to the mounting holes.

[0007] The end plate includes a web plate, upper and lower end mounting plates located at the upper and lower parts of the outer side of the web plate; the mounting planes of the mounting plates at the upper and lower parts of the end plate are arranged in parallel and are provided with multiple pairs of upper and lower coaxial mounting holes.

[0008] The two side plates are arranged left and right, the two end plates are arranged front and back, the side plates and the end plates are welded end to end in sequence to form a rectangular frame structure, and sealing grooves are arranged on the mounting surfaces of the mounting plates located at the upper part; the bottom plate is fixedly connected to the bottom plate connection seat.

[0009] In the battery box body of the present utility model, both end faces of the end plate are attached and welded to the outer side surface of the inner vertical plate, and a sealing plate for closing the end of its abdominal cavity is fixed to the end face of the side plate; or the end face of the side plate is attached and welded to the inner side surface of the web plate.

[0010] In the battery box body of the present utility model, the internal reinforcing ribs in the abdominal cavity are arranged in a W shape.

[0011] In the battery box body of the present utility model, there are inclined rib plates obliquely intersecting with the web plate between the mounting plates at the upper and lower parts of the end plate and the web plate, and mounting process holes adapted to the use of the mounting holes are provided at positions adjacent to the mounting holes on the inclined rib plates.

[0012] In the battery box body of the present utility model, there is an angle reinforcing rib between the adjacent side plate and the end plate, and the angle reinforcing rib is welded to the outer side surface of the inner vertical plate and the inner side surface of the web plate.

[0013] In the battery box body of the present utility model, the bottom plate is a liquid cooling plate with a liquid cooling flow channel arranged inside.

[0014] In the battery box body of the present utility model, the side surfaces on the left and right sides of the bottom plate are attached and welded to the bottom plate connection seats at the bottom of the side plate. Cooling flow channels are arranged in the bottom plate connection seats. The liquid cooling flow channel in the bottom plate is communicated with the cooling flow channel in the bottom plate connection seat on the welding surface, and the inlet and outlet pipe joints of the coolant in the bottom plate are arranged on the bottom plate connection seats.

[0015] In the battery box body of the present utility model, the bottom plate connection seat on the side plate includes a bottom rib plate forming a cavity structure with the inner vertical plate and an inclined rib plate located above the bottom rib plate. There is a module mounting step at the connection of the bottom rib plate and the inclined rib plate. The bottom surface of the module mounting step, the bottom surface of the bottom rib plate and the bottom surface of the mounting plate at the lower part of the side plate are flush. The cooling flow channel in the bottom plate connection seat is arranged in the module mounting step.

[0016] The technical solution for the present utility model to achieve its purpose is: a battery system, which includes a cover plate and a plurality of the aforementioned battery box bodies; the battery box bodies are stacked up and down, and the mounting plates at the lower part of the upper battery box body are attached to the mounting plates at the upper part of the lower battery box body; a sealing strip is placed in the sealing groove at the top of each layer of battery box body; a plurality of battery modules are arranged in each layer of battery box body; the cover plate covers the upper side of the uppermost layer of battery box body and is fixedly connected to the mounting plate at the upper part of the uppermost layer of battery box body through bolt assemblies matching with the mounting holes at the four peripheral edges, and the battery box bodies are fixedly connected through bolt assemblies matching with the mounting holes on the mutually attached mounting plates.

[0017] The technical solution for the present utility model to achieve its purpose is: an electric vehicle, which has the aforementioned battery system.

[0018] Compared with the prior art, in the present utility model, the side plate of the battery box body is made of extruded aluminum profiles, which has the characteristics of light weight and high strength, can effectively reduce the weight of the battery box body, and improve the energy density of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the battery box body of the present utility model.

[0020] Figure 2 is an exploded view of the battery box body of the present utility model.

[0021] Figure 3 is a schematic structural diagram of the side plate of the battery box body of the present utility model.

[0022] Figure 4 is a schematic structural diagram of the end plate of the battery box body of the present utility model.

[0023] Figure 5 is a schematic cross-sectional structural diagram of the battery box body of the present utility model.

[0024] Figure 6 is Figure 5 a partial enlarged view of part A in

[0025] Figure 7 is a schematic structural diagram of the battery system of the present utility model.

[0026] Figure 8 is a schematic diagram of the electric vehicle of the present utility model.

[0027] Names and serial numbers of components in the figures:

[0028] Battery system 100, control system 200, motor 300

[0029] Battery box body 10, cover plate 20, cable harness 30, cooling pipeline 40, sealing strip 50, bolt assembly 60, battery module 70.

[0030] Left side plate 11, front end plate 12, right side plate 13, bottom plate 14, liquid cooling flow channel 141, rear end plate 15, corner reinforcing rib 16, inlet and outlet pipe joint 17.

[0031] Web 121, upper end mounting plate 122, lower end mounting plate 123, upper end inclined rib plate 124, lower end inclined rib plate 125, maintenance window 126.

[0032] Outer vertical plate 131, inner vertical plate 132, upper side mounting plate 133, lower side mounting plate 134, inner reinforcing rib 135, mounting hole 136, mounting process hole 137, bottom plate connecting seat 138, bottom rib plate 1381, inclined rib plate 1382, cooling flow channel 1383, module mounting step 1384, sealing groove 139. Detailed implementation manners

[0033] The following describes the specific implementation manners in conjunction with the accompanying drawings.

[0034] As Figure 1 Figure 2 shown, the battery box body 10 includes: a bottom plate 14, side plates on both sides and end plates at both ends, all made of extruded aluminum profiles. The side plates include a left side plate 11 and a right side plate 13, and the left side plate 11 and the right side plate 13 are arranged left and right. The end plates include a front end plate 12 and a rear end plate 15, and the front end plate 12 and the rear end plate 15 are arranged front and rear. The left side plate 11, the front end plate 12, the right side plate 13, and the rear end plate 15 are welded end to end in sequence to form a rectangular frame structure. The bottom plate 14 is fixedly connected inside the rectangular frame structure and is located at the bottom of the rectangular frame structure.

[0035] As Figure 3 shown, the side plates forming the left side plate 11 and the right side plate 13 are made of extruded aluminum profiles, and include an inner vertical plate 132, an outer vertical plate 131, mounting plates located at the upper and lower parts of the inner and outer vertical plates, and a bottom plate connection seat 138 located at the bottom of the outer side of the inner vertical plate for fixedly connecting the bottom plate 14. The mounting plates located at the upper and lower parts of the inner and outer vertical plates include a side upper mounting plate 133 located at the upper part of the inner vertical plate 132 and the outer vertical plate 131, and a side lower mounting plate 134 located at the lower part of the inner vertical plate 132 and the outer vertical plate 131. The inner vertical plate 132 and the outer vertical plate 131 are arranged in parallel, and the side upper mounting plate 133 and the side lower mounting plate 134 are arranged in parallel.

[0036] The top surface of the side upper mounting plate 133 and the bottom surface of the side lower mounting plate 134 are both mounting surfaces, and the two mounting surfaces are arranged in parallel. The inner vertical plate 132, the outer vertical plate 131, the side upper mounting plate 133, and the side lower mounting plate 134 form a rectangular abdominal cavity. There are multiple inner reinforcing ribs 135 connecting the inner vertical plate 132 and the outer vertical plate 131 in the abdominal cavity. The inner reinforcing ribs 135 intersect with the inner vertical plate 132 and the outer vertical plate 131 in an inclined manner, and the multiple inner reinforcing plates 135 are arranged in a W shape.

[0037] A plurality of mounting holes 136 are provided on both the side upper mounting plate 133 and the side lower mounting plate 134. The mounting holes on the side upper mounting plate 133 and the mounting holes on the side lower mounting plate 134 are in one-to-one correspondence and are arranged coaxially up and down. Corresponding to each mounting hole, mounting process holes 137 are provided at positions on the outer side surface of the outer vertical plate 131 adjacent to the mounting holes of the side upper mounting plate 133 and the side lower mounting plate 134. The mounting process holes 137 are used to install bolt assemblies 60 when connecting between the battery box bodies 10.

[0038] As Figure 4 shown, the end plates forming the front end plate 12 and the rear end plate 15 are made of extruded aluminum profiles, and include a web 121 and mounting plates located at the upper and lower parts outside the web 121.

[0039] The mounting plates located at the upper and lower parts outside the web 121 include an upper-end mounting plate 122 located outside the upper part of the web 121 and a lower-end mounting plate 123 located outside the lower part of the web 121. The outside of the web 121 refers to the side of the web 121 facing away from the inner cavity of the battery box 10. The top surface of the upper-end mounting plate 122 and the bottom surface of the lower-end mounting plate 123 are both mounting surfaces, and these two mounting surfaces are arranged in parallel. A plurality of mounting holes 136 are provided on both the upper-end mounting plate 122 and the lower-end mounting plate 123. The mounting holes 136 on the upper-end mounting plate 122 correspond to the mounting holes 136 on the lower-end mounting plate 123 one by one and are arranged coaxially up and down.

[0040] Optionally, a bottom plate connection seat for fixedly connecting the bottom plate 14 can be provided at the bottom of the inner side surface of the web. The bottom plate connection seat on the end plate can be welded to the end face of the bottom plate, or the bottom plate connection seat is located on the lower side surface of the bottom plate to support the bottom plate.

[0041] Optionally, there are diagonal stiffening plates obliquely intersecting with the web between the mounting plates at the upper and lower parts of the end plate and the web 121. Mounting process holes 137 are provided at positions of the diagonal stiffening plates adjacent to the mounting holes 136.

[0042] As Figure 4 shown, the diagonal stiffening plate between the upper-end mounting plate 122 and the web 121 is the upper-end diagonal stiffening plate 124, which encloses a cavity with the web 121 and the upper-end mounting plate 122. Mounting process holes 137 are provided at positions of the upper-end diagonal stiffening plate 124 adjacent to the mounting holes 136 on the upper-end mounting plate 122 for use when bolt assemblies 60 are inserted into the mounting holes on the upper-end mounting plate 122.

[0043] The diagonal stiffening plate between the lower-end mounting plate 123 and the web 121 is the lower-end diagonal stiffening plate 125, which encloses a cavity with the web 121 and the lower-end mounting plate 123. Mounting process holes 137 are provided at positions of the lower-end diagonal stiffening plate 125 adjacent to the mounting holes on the lower-end mounting plate 123 for use when bolt assemblies 60 are inserted into the mounting holes on the lower-end mounting plate 123.

[0044] Sealing grooves 139 for placing sealing strips are provided on the mounting surfaces of the upper-side mounting plate 133 and the upper-end mounting plate 122. The sealing grooves 139 on the four mounting surfaces are connected end to end. The sealing strips 50 placed in the sealing grooves 139 connected end to end form a sealing ring.

[0045] As Figure 1 shown, angle stiffening ribs 16 are welded between the adjacent side plates and end plates. The angle stiffening ribs 16 are located inside the box and are welded to the inner vertical plate 132 and the web 121 to enhance the connection strength between the side plates and the end plates.

[0046] As Figure 1 shown, the two end faces of the end plate are abutted and welded to the outer side surface of the inner vertical plate 132. AsFigure 7 As shown, a sealing plate for closing the abdominal cavity end of the side plate is fixed to the end face of the side plate. In some embodiments, the end face of the side plate may also be attached to and welded to the inner side of the web plate.

[0047] A maintenance window 126 and a window cover plate for closing the maintenance window 126 are provided on the web plate 121 of the end plate. When performing maintenance and inspection on the battery system, the window cover plate can be removed to check the condition inside the battery box through the maintenance window 126.

[0048] As Figure 6 shown, the bottom plate 14 is a liquid cooling plate with a liquid cooling channel 141 provided inside. The bottom plate 14 is fixed to the bottom plate connection seat 138.

[0049] Optionally, a cooling channel 1383 is provided in the bottom plate connection seat 138 on the side plate, and the side surfaces on both sides of the bottom plate 14 are attached to and welded to the bottom plate connection seat 138 on the corresponding side plate.

[0050] The liquid cooling channel 141 in the bottom plate 14 communicates with the cooling channel 1383 in the bottom plate connection seat 138 on the welding surface, and the inlet and outlet pipe joints 17 of the coolant in the bottom plate 14 are provided on the bottom plate connection seat 138. In some embodiments, the inlet and outlet pipe joints 17 of the coolant in the bottom plate 14 may also be directly provided on the bottom plate 14.

[0051] As Figure 6 shown, the bottom plate connection seat 138 on the side plate includes a bottom rib plate 1381 that jointly forms a cavity structure with the inner vertical plate 132 and an inclined rib plate 1382 located above the bottom rib plate 1381. There is a module installation step 1384 at the connection between the bottom rib plate 1381 and the inclined rib plate 1382. The bottom surface of the module installation step 1384, the bottom surface of the bottom rib plate 1381, and the bottom surface of the side lower installation plate 134 are flush. The cooling channel 1383 in the bottom plate connection seat 138 is provided in the module installation step 1384. The battery module 70 is installed on the module installation step 1384, and the inlet and outlet pipe joints 17 are provided on the module installation step 1384. The inlet and outlet pipe joints 17 communicate with the liquid cooling channel 141 in the bottom plate 14 through the cooling channel 1383.

[0052] This embodiment provides a battery system, as Figure 7As shown, the battery system 100 includes a cover plate 20, a plurality of the aforementioned battery boxes 10, a battery module 70, a cable harness 30 for connecting each battery module, and a cooling pipe 40 for connecting a liquid cooling plate; the battery boxes 10 are arranged in an upper and lower stacked manner, and the mounting plates (including side lower mounting plates and end lower mounting plates) at the lower part of the upper-layer battery box 10 are fitted with the mounting plates (including side upper mounting plates and end upper mounting plates) at the upper part of the lower-layer battery box 10; a sealing ring 50 is placed in the sealing groove 139 at the top of each layer of battery box 10; a plurality of battery modules 70 are arranged in each layer of battery box 10; the cover plate 20 covers the upper side of the uppermost-layer battery box 10 and is fixedly connected to the mounting plate of the uppermost-layer battery box 10 through a bolt assembly that cooperates with the mounting holes 136 at the four peripheral edges, and the battery boxes 10 are fixedly connected to each other through a bolt assembly that cooperates with the mounting holes on the mutually fitted mounting plates.

[0053] This embodiment also discloses an electric vehicle having the aforementioned battery system 100. The electric vehicle can be a construction machine, such as a loader, an excavator, etc., or a road vehicle, such as a truck, a bus, etc. As Figure 8 shown, the battery system 100 is electrically connected to the motor 300 through a control system 200 to provide driving power for the motor 300.

[0054] In this embodiment, the battery box 10 is mainly made of extruded aluminum profiles, which can effectively reduce the weight of the battery box 10 and improve the energy density of the battery system.

Claims

1. A battery box body, characterized in that, Comprising: A bottom plate, two side plates and two end plates, all made of extruded aluminum profiles; The side plate includes inner and outer vertical plates arranged in parallel, mounting plates located at the upper and lower parts of the inner and outer vertical plates and forming a rectangular abdominal cavity with the inner and outer vertical plates, and a bottom plate connection seat located at the bottom of the outer side of the inner vertical plate for fixedly connecting the bottom plate; there are multiple inner reinforcing ribs connecting the inner and outer vertical plates in the abdominal cavity; the mounting planes of the mounting plates at the upper and lower parts of the side plate are arranged in parallel and are provided with a plurality of pairs of upper and lower and coaxially arranged mounting holes; mounting process holes adapted to the mounting holes are provided at positions on the outer side of the outer vertical plate adjacent to the mounting holes; The end plate includes a web plate and mounting plates located at the upper and lower parts outside the web plate; the mounting planes of the mounting plates at the upper and lower parts of the end plate are arranged in parallel and are provided with a plurality of pairs of upper and lower and coaxially arranged mounting holes; The two side plates are arranged left and right, the two end plates are arranged front and back, the side plates and the end plates are welded end to end in sequence to form a rectangular frame structure, and sealing grooves are provided on the mounting surfaces of the mounting plates located at the upper part; the bottom plate is fixedly connected to the bottom plate connection seat.

2. The battery box according to claim 1, characterized in that, Both end faces of the end plate are attached and welded to the outer side of the inner vertical plate, and a sealing plate for closing the end of the abdominal cavity is fixed to the end face of the side plate; or the end face of the side plate is attached and welded to the inner side of the web plate.

3. The battery box according to claim 1, characterized in that, The inner reinforcing ribs in the abdominal cavity are arranged in a W shape.

4. The battery box according to claim 1, characterized in that, There are inclined rib plates obliquely intersecting with the web plate between the mounting plates at the upper and lower parts of the end plate and the web plate, and mounting process holes adapted to the mounting holes are provided at positions on the inclined rib plates adjacent to the mounting holes.

5. The battery box according to claim 1, wherein, There are corner reinforcing ribs between the adjacent side plates and end plates, and the corner reinforcing ribs are welded to the outer side of the inner vertical plate and the inner side of the web plate.

6. The battery box according to any one of claims 1 to 5, characterized in that The bottom plate is a liquid cooling plate with a liquid cooling channel arranged inside.

7. The battery box according to claim 5, characterized in that The left and right sides of the bottom plate are attached and welded to the bottom plate connection seats at the bottom of the side plates. Cooling channels are arranged in the bottom plate connection seats. The liquid cooling channels in the bottom plate are communicated with the cooling channels in the bottom plate connection seats on the welding surface, and the inlet and outlet pipe joints of the coolant in the bottom plate are arranged on the bottom plate connection seats.

8. The battery box according to claim 7, wherein, The bottom plate connection seat on the side plate includes a bottom rib plate forming a cavity structure with the inner vertical plate and an inclined rib plate located above the bottom rib plate. There is a module mounting step at the connection of the bottom rib plate and the inclined rib plate. The bottom surface of the module mounting step, the bottom surface of the bottom rib plate and the bottom surface of the mounting plate at the lower part of the side plate are flush. The cooling channel in the bottom plate connection seat is arranged in the module mounting step.

9. A battery system, characterized in that, Comprising a cover plate and a plurality of battery boxes according to any one of claims 1 to 8; the battery boxes are stacked up and down, the mounting plates at the lower part of the upper-layer battery box are attached to the mounting plates at the upper part of the lower-layer battery box; sealing strips are placed in the sealing grooves at the top of each layer of battery boxes; a plurality of battery modules are arranged in each layer of battery boxes; the cover plate covers the upper side of the top-layer battery box and is fixedly connected to the mounting plate at the upper part of the top-layer battery box through bolt assemblies matching with the mounting holes along the four peripheral edges, and the battery boxes are fixedly connected to each other through bolt assemblies matching with the mounting holes on the mutually attached mounting plates.

10. An electric vehicle, characterized in that, Having the battery system according to claim 9.

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