Water cooling plate, battery pack and battery system

Abstract

The utility model discloses a water cooling plate, a battery pack and a battery system. The water cooling plate comprises a water cooling plate main body, a steel sleeve and a threaded sleeve, the water cooling plate main body is provided with a plurality of first through holes and a plurality of second through holes, the steel sleeve is arranged in the first through holes in a penetrating manner, the steel sleeve is provided with a through hole for a fastener to penetrate through, and the threaded sleeve is arranged in the second through hole in a penetrating manner. The threaded sleeve is arranged on the water-cooling plate main body, so that the threaded sleeve and the battery module can be conveniently connected and fixed, the steel sleeve is arranged on the water-cooling plate main body, a fastener can conveniently penetrate through the steel sleeve to fix the water-cooling plate on a supporting plate in a battery box shell, the fastener cannot directly contact with the water-cooling plate main body, and the water-cooling plate main body is prevented from being extruded, deformed and abraded; the product reliability is improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling, in particular to a water cooling plate, a battery pack and a battery system. Background Art

[0002] A battery pack usually includes a battery module and a water cooling plate. The battery module is attached to the water cooling plate. A cooling channel is arranged in the water cooling plate for introducing a cooling medium to perform heat exchange with the battery module in contact with the water cooling plate. In the prior art, in order to fix the battery module, installation pipe fittings are usually welded or bonded on the water cooling plate, and then the battery module is fixed on the pipe fittings. The assembly structure is complex, and the connection structure strength between the pipe fittings and the water cooling plate is average, and the durability is average. Moreover, the water cooling plate needs to be fixed on a support plate in the battery box. If the fastener directly passes through the through hole on the water cooling plate and is connected to the support plate, the fastener directly contacts the water cooling plate, which easily causes uneven stress on the through hole part of the water cooling plate, resulting in deformation of the water cooling plate, and the fastener will wear the water cooling plate, affecting the product quality and shortening the service life of the water cooling plate. Summary of the Utility Model

[0003] To solve one of the above technical problems, the utility model provides a water cooling plate, a battery pack and a battery system.

[0004] The utility model adopts the following technical solutions:

[0005] The first object of the present application is to provide a water cooling plate, including:

[0006] A water cooling plate main body, the water cooling plate main body has a plurality of first through holes and a plurality of second through holes;

[0007] A steel sleeve, the steel sleeve is penetrated through the first through hole, and the steel sleeve has a through hole for the fastener to penetrate through;

[0008] A threaded sleeve, the threaded sleeve is penetrated through the second through hole.

[0009] Optionally, the water cooling plate main body includes:

[0010] A main board body, the main board body has a water channel cavity and openings at both ends of the water channel cavity;

[0011] A front baffle and a rear baffle, the front baffle and the rear baffle are respectively connected to both ends of the main board body along the length direction, and the front baffle and the rear baffle respectively block the openings at both ends of the main board body;

[0012] Both the front baffle and the rear baffle are provided with first through holes and second through holes.

[0013] Optionally, among the front baffle and the rear baffle, the through hole of the steel sleeve on one of them is a round hole, and the through hole of the steel sleeve on the other one is a long strip hole.

[0014] Optionally, the main board body includes a middle board and side boards located on both sides of the middle board;

[0015] Water channel cavities are provided in both the middle board and the side boards, and the water channel cavities of the middle board and the side boards are connected and communicated with each other;

[0016] The middle board and the side boards are fixedly welded by laser welding;

[0017] Optionally, the front baffle and the rear baffle are respectively welded to the middle board and the side boards by laser welding.

[0018] Optionally, the steel sleeve includes a pipe body and a flange portion connected to the end of the pipe body;

[0019] The flange portion fits on the surface of the water-cooled plate body, and the pipe body passes through the first through hole.

[0020] Optionally, the threaded sleeve is a spiral steel wire.

[0021] Optionally, a plurality of partition ribs are provided in the water channel cavity of the water-cooled plate body to divide the water channel cavity into a plurality of water inlet channels and water outlet channels. Each water inlet channel and each water outlet channel are parallel to each other, the water inlet channels and the water outlet channels are connected and communicated with each other. The water-cooled plate body has a water inlet and a water outlet. The water inlet is communicated with each of the water inlet channels, and the water outlet is communicated with each of the water outlet channels.

[0022] A second object of the present application is to provide a battery pack, including: the above-mentioned water-cooled plate and a battery module. The battery module has end plates. One end of a connecting member passes through the end plate and is threadedly connected to the threaded sleeve, and the other end of the connecting member is limited to the end plate.

[0023] The battery module has a plurality of battery cells and two end plates. Each battery cell is arranged in sequence along the thickness direction. The two end plates are respectively located on both sides of each battery cell. Longitudinal holes are provided on the end plates. The fastener can be a long bolt. The screw rod of the long bolt passes through the longitudinal holes on the end plate and is threadedly connected to the threaded sleeve, and the cap body of the long bolt is limited to the top of the end plate.

[0024] The present application also provides a battery system, including: a battery box shell, a plurality of support plates and a plurality of battery packs. The battery box shell has a cavity. Each of the support plates is arranged in the cavity. A plurality of battery packs are supported by the support plates. One end of a fastener passes through the through hole of the steel sleeve and is connected to the support plate, and the other end of the fastener is limited to the steel sleeve. The cap body of the fastener is in direct contact with the steel sleeve and will not contact the water-cooled plate. Therefore, the water-cooled plate will not be worn. Its cap body contacts the steel sleeve, and the steel sleeve passes through the first through hole, so that the water-cooled plate is evenly stressed and not easily deformed.

[0025] By adopting the above technical solution, the present application has the following beneficial effects:

[0026] In the present application, by providing a threaded sleeve on the main body of the water-cooling plate, it is convenient to connect and fix the threaded sleeve and the battery module. By providing a steel sleeve on the main body of the water-cooling plate, it is convenient for the fastener to pass through the steel sleeve to fix the water-cooling plate on the support plate inside the battery box shell. The fastener does not directly contact the water-cooling plate, preventing the water-cooling plate from being extruded and deformed and worn, improving the product reliability and extending the product life.

[0027] The following further describes in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings. Description of the Drawings

[0028] As a part of the present application, the accompanying drawings are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the accompanying drawings:

[0029] Figure 1 Shows a three-dimensional structural schematic diagram of the battery system provided by the embodiment of the present application;

[0030] Figure 2 Shows a partial structural schematic diagram of the battery system provided by the embodiment of the present application;

[0031] Figure 3 Shows a schematic diagram of the hoisting fitting of the hoisting fitting group on the battery system provided by the embodiment of the present application in an unfolded state;

[0032] Figure 4 Shows a bottom view of the battery system provided by the embodiment of the present application;

[0033] Figure 5 Shows a structural schematic diagram of the fixing fitting provided on the bottom beam of the battery system provided by the embodiment of the present application;

[0034] Figure 6 Shows a top view of the battery system provided by the embodiment of the present application;

[0035] Figure 7 Shows a schematic diagram of the cover body of the battery system provided by the embodiment of the present application in a separated state;

[0036] Figure 8 Shows a bottom view of the partial structure of the battery system provided by the embodiment of the present application;

[0037] Figure 9The figure shows a partial structural schematic diagram of the battery system provided by the embodiment of the present application;

[0038] Figure 10 The figure shows an internal structural schematic diagram of the battery system provided by the embodiment of the present application;

[0039] Figure 11 The figure shows a structural schematic diagram of the water-cooling plate of the battery system provided by the embodiment of the present application;

[0040] Figure 12 The figure shows a partial structural diagram of the water-cooling plate of the battery system provided by the embodiment of the present application;

[0041] Figure 13 The figure shows an internal structural schematic diagram of the water-cooling plate of the battery system provided by the embodiment of the present application.

[0042] In the figure: 1. Battery box body; 11. Battery box shell; 111. Concave groove; 112. Opening; 12. Battery module; 121. End plate; 13. High-voltage box assembly; 14. Cover body; 141. Convex shell; 142. Flanging; 15. Sealing gasket; 16. Water-cooling plate; 16a. Inlet water flow channel; 16b. Outlet water flow channel; 16c. Water inlet; 16d. Water outlet; 161. Main board body; 1611. Middle board; 1612. Side board; 162. Front baffle; 163. Rear baffle; 164. Steel sleeve; 1641. Pipe body; 1642. Flange part; 165. Threaded sleeve; 17. Support plate; 18. Insulating plate; 2. Lifting cooperation assembly; 21. Connecting plate; 211. Shaft body; 212. Limiting block; 213. Avoidance opening; 214. Magnetic attraction component; 22. Lifting cooperation part; 221. Sleeve; 222. Lifting cooperation plate; 2221. Avoidance hole; 223. Locking cooperation part; 23. Elastic part; 3. Bottom beam; 31. Coarse guiding cooperation part; 32. Fine guiding cooperation part; 33. Thickened plate; 4. Fixing cooperation part; 41. Seat body; 42. Hook part; 5. Water-cooling unit; 6. Battery swapping connector; 7. DC / DC module; 8. Support box shell; 81. Bottom wall; 811. Concave shell part; 82. Top wall; 83. Side wall; 84. Bracket; 9. Connecting frame; 10. Water kettle.

[0043] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0045] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0046] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] Embodiment 1

[0048] Refer to Figures 10 to 13 As shown, the embodiment of the present application provides a water-cooling plate 16 of a battery pack, which includes: a water-cooling plate main body, a steel sleeve 164, and a threaded sleeve 165. The water-cooling plate main body has a plurality of first through holes and a plurality of second through holes. The steel sleeve 164 is inserted through the first through holes. The steel sleeve 164 has a through hole for a fastener to pass through. The threaded sleeve 165 is inserted through the second through holes.

[0049] The threaded sleeve 165 can be used to connect with the battery module 12 to fix the battery module 12 and the water-cooling plate 16, while the steel sleeve 164 is used to connect and fix the water-cooling plate 16 and the support plate 17 of the battery box. In the present application, by providing the threaded sleeve 165 on the water-cooling plate main body, it is convenient to connect and fix the threaded sleeve 165 and the battery module 12. By providing the steel sleeve 164 on the water-cooling plate main body, it is convenient for the fastener to pass through the steel sleeve 164 to fix the water-cooling plate 16 on the support plate 17 inside the battery box shell 11. The fastener does not directly contact the water-cooling plate 16, preventing the water-cooling plate 16 from being squeezed and deformed and worn, improving the product reliability and extending the product life.

[0050] In some possible embodiments, the water-cooling plate body includes: a main board body 161, a front baffle 162, and a rear baffle 163. The main board body 161 has a water channel cavity and openings at both ends of the water channel cavity. The front baffle 162 and the rear baffle 163 are respectively connected to both ends of the main board body 161 along the length direction. The front baffle 162 and the rear baffle 163 respectively block the openings at both ends of the main board body 161. The front baffle 162 and the rear baffle 163 are both provided with a first through hole and a second through hole. Thereby, the front baffle 162 and the rear baffle 163 on both sides of the main board body 161 are both convenient for connecting to the battery module 12, and the front baffle 162 and the rear baffle 163 are both convenient for being fixed on the support plate 17 of the battery box.

[0051] In some possible embodiments, among the front baffle 162 and the rear baffle 163, the through hole of the steel sleeve 164 on one of them is a round hole, and the through hole of the steel sleeve 164 on the other is a long strip hole.

[0052] By providing a long strip hole on one of the front baffle 162 and the rear baffle 163, the manufacturing precision and assembly precision of the product are reduced. When the steel sleeve 164 on one side baffle is fixed to the connection hole on the support plate 17 through a fastener, the through hole of the steel sleeve 164 on the other side baffle is long strip-shaped, avoiding misalignment with the connection hole on the other side of the support plate 17. By adjusting the position of the fastener along the length direction of the through hole, it can be smoothly connected to the corresponding connection hole on the support plate 17.

[0053] In some possible embodiments, the main board body 161 includes a middle board 1611 and side boards 1612 located on both sides of the middle board 1611. Water channel cavities are provided in both the middle board 1611 and the side boards 1612. The water channel cavities of the middle board 1611 and the side boards 1612 are connected. The middle board 1611 and the side boards 1612 are fixed by laser welding. By dividing the main body into three boards, the area of a single board is reduced, which is convenient for production. And the structures of each board are firmly welded by laser welding, with beautiful welds, high strength, and strong corrosion resistance.

[0054] In some possible embodiments, the front baffle 162 and the rear baffle 163 are respectively welded to the middle board 1611 and the side boards 1612 by laser welding. All structural parts of the water-cooling plate 16 are welded by laser welding, improving the overall quality of the product.

[0055] In some possible embodiments, see Figure 12As shown, the steel sleeve 164 includes a tube body 1641 and a flange portion 1642 connected to the end of the tube body 1641, the flange portion 1642 is attached to the surface of the water-cooled plate body, and the tube body 1641 is penetrated through the first through hole. The rod of the fastener passes through the tube body 1641, and the cap of the fastener is limited to the flange portion 1642. The fastener does not contact the water-cooled plate body and will not cause wear to the water-cooled plate body.

[0056] In some possible implementation schemes, the threaded sleeve 165 may be a nut or a spiral steel wire.

[0057] In some possible implementations, see Figure 13 As shown, a plurality of partition ribs are arranged in the water channel cavity of the water cooling plate body to divide the water channel cavity into a plurality of water inlet channels 16a and water outlet channels 16b, each water inlet channel 16a is parallel to each water outlet channel 16b, the water inlet channel 16a and the water outlet channel 16b are connected, and the water cooling plate body has a water inlet 16c and a water outlet 16d, the water inlet 16c is connected to each of the water inlet channels 16a, and the water outlet 16d is connected to each of the water outlet channels 16b. The plurality of water inlet channels and the plurality of water outlet channels are connected at one end of the water cooling plate 16, the water flow path has few turns, the water flow resistance is small, the water flow rate is large, and the cooling efficiency is improved.

[0058] The embodiment of the present application also provides a battery pack, including: the above-mentioned water cooling plate 16 and a battery module 12, the battery module 12 has an end plate 121, one end of the connecting piece passes through the end plate 121 and is threadedly connected to the threaded sleeve 165, and the other end of the connecting piece is limited to the end plate 121.

[0059] The battery module 12 has multiple battery cells and two end plates 121. The battery cells are arranged in sequence along the thickness direction. The two end plates 121 are respectively located on both sides of each battery cell. A longitudinal hole is set on the end plate 121. The connecting piece can be a long bolt. The screw of the connecting piece passes through the longitudinal hole on the end plate 121 and is threadedly connected to the threaded sleeve 165. The cap body of the long bolt is limited to the top of the end plate 121.

[0060] The embodiment of the present application also provides a battery system, including: a battery box shell 11, a plurality of support plates 17 and a plurality of battery packs, the battery box shell 11 has a cavity, each of the support plates 17 is arranged in the cavity, the battery pack is supported by the support plate 17, one end of the fastener passes through the through hole of the steel sleeve 164 and is connected to the support plate 17, and the other end of the fastener is limited on the steel sleeve 164. The cap body of the fastener is in direct contact with the steel sleeve 164, but not with the main body of the water-cooled plate, so it will not wear the main body of the water-cooled plate, and its cap body is in contact with the steel sleeve 164, the steel sleeve 164 is penetrated in the first through hole, and the peripheral wall of the steel sleeve 164 is in contact with the inner wall of the first through hole, so that the main body of the water-cooled plate is balanced in force and not easily deformed.

[0061] Embodiment 2

[0062] Refer to Figures 1 to 3 As shown, the embodiment of the present application describes the battery system in detail. The battery system has a hoisting and mating assembly 2, including: a connecting plate 21 and a hoisting and mating member 22. The connecting plate 21 is used for connection and fixation. For example, the connecting plate 21 can be fixed on the battery box shell 11 of the battery system. The hoisting and mating member 22 is rotatably connected to the connecting plate 21. The hoisting and mating member 22 has an unfolded state and a folded state. In the unfolded state, refer to Figure 3 As shown, the hoisting and mating member 22 rotates to be perpendicular to the connecting plate 21. In the folded state, refer to Figure 1 As shown, the included angle between the hoisting and mating member 22 and the connecting plate 21 rotates to be less than a set value. For example, the hoisting and mating member 22 can rotate to fit on the outer surface of the battery box body 1 or fit on the connecting plate 21, or the hoisting and mating member 22 can rotate to be parallel to the connecting plate 21. The included angle between the hoisting and mating member 22 and the connecting plate 21 can be greater than or equal to 0 and less than 20 degrees.

[0063] The hoisting and mating assembly 2 of the present application has a folded state and an unfolded state. When it is necessary to hoist and transfer the battery box, the hoisting and mating assembly 2 can be adjusted to the unfolded state to facilitate connection with the hoisting equipment. When the battery box does not need to be hoisted, the hoisting and mating assembly 2 can be folded to avoid collision between the hoisting and mating member 22 and the outside world, improving safety.

[0064] In some possible implementation schemes, a shaft body 211 is provided on the connecting plate 21. The hoisting and mating member 22 has a sleeve 221 and a hoisting and mating plate 222. The sleeve 221 is rotatably sleeved on the shaft body 211. The hoisting and mating plate is connected to the sleeve 221. Hoisting and mating holes are provided on the hoisting and mating plate 222. The hoisting and mating holes can facilitate connection with a crane and provide crane lifting points. The hoisting and mating member 22 can rotate around the shaft body 211 through the sleeve 221 to adjust the hoisting and mating assembly 2 to the unfolded state or the folded state.

[0065] In some possible embodiments, two limiting blocks 212 are provided on the connecting plate 21. The two limiting blocks 212 are arranged at intervals, and the sleeve 221 is located between the two limiting blocks 212. Or rather, the sleeve 221 penetrates through the space between the two limiting blocks 212, and the extending direction of the sleeve 221 is perpendicular to the arrangement direction of the two limiting blocks 212. The hoisting fitting 22 has a locking fitting portion 223, and the locking fitting portion 223 is at least provided on the sleeve 221. In the unfolded state, the hoisting fitting 22 rotates to be perpendicular to the connecting plate 21, and the hoisting fitting 22 translates along the shaft body 211, so that the locking fitting portion 223 moves between the two limiting blocks 212. The two limiting blocks 212 and the locking fitting portion 223 are in limiting cooperation to limit the rotation of the sleeve 221, so that the hoisting fitting plate 222 protrudes from the surface of the battery box body 1 and remains perpendicular to the connecting plate 21, which is convenient for connection with hoisting equipment. The opposite surfaces of the two limiting blocks 212 may be flat surfaces, and the two sides of the locking fitting portion 223 may also be flat surfaces. In the unfolded state, the flat surfaces on both sides of the locking fitting portion 223 along the thickness direction of the hoisting fitting plate 222 are respectively in contact with or have a small gap with the flat surfaces of the two limiting blocks 212, so as to limit the hoisting fitting 22 to maintain the unfolded state. In the folded state, the hoisting fitting 22 translates along the shaft body 211, so that the locking fitting portion 223 disengages from the limiting space between the two limiting blocks 212, and the hoisting fitting 22 rotates and folds on the outer surface of the battery box body 1.

[0066] In some possible embodiments, the hoisting fitting assembly 2 includes an elastic member 23. The elastic member 23 is sleeved on the shaft body 211. One end of the elastic member 23 abuts against the sleeve 221, and the other end of the elastic member 23 abuts against one of the connecting plates 21. In the folded state, the hoisting fitting 22 and the limiting block 212 are in limiting cooperation, and the elastic member 23 is in a compressed state. In the state where the hoisting fitting 22 rotates to be perpendicular to the connecting plate 21, the elastic member 23 elastically releases and pushes the sleeve 221 to move along the shaft body 211, so that the locking fitting portion 223 moves between the two limiting blocks 212.

[0067] In the folded state, the hoisting fitting 22 and the connecting plate 21 are in limiting cooperation, and the elastic member 23 is in a compressed state. In the state where the hoisting fitting 22 rotates to be perpendicular to the connecting plate 21, the elastic member 23 elastically releases and pushes the hoisting fitting 22 upward, so that the locking fitting portion 223 moves between the two limiting blocks 212.

[0068] Two end seats can be provided on the connecting plate 21, and the two ends of the shaft body 211 are respectively connected to the two end seats. The elastic member 23 can be a spring, which is sleeved on the shaft body 211, and the two ends of the spring are respectively pressed against the end seat and sleeve 221 below. When the lifting fitting 22 is rotated to a state perpendicular to the connecting plate 21, the elastic member 23 is elastically released, and the sleeve 221 is pushed up along the shaft body 211, so that the sleeve 221 contacts the end seat at the top. At this time, the locking fitting 223 just moves between the two limit blocks 212.

[0069] In some possible embodiments, the locking fitting portion 223 extends along the lifting fitting plate 222, and the locking fitting portion 223 is vertically connected to the locking fitting plate. In the folded state, the limit block 212 is limited to the side of the locking fitting portion 223 away from the elastic member 23, and the elastic member 23 is in a compressed state.

[0070] In some possible implementations, the connecting plate 21 is provided with an escape opening 213, and during the rotation of the lifting fitting 22, the locking fitting portion 223 extends into the escape opening 213. During the rotation of the lifting fitting 22, the escape opening 213 avoids the locking fitting portion 223 to prevent the locking fitting portion 223 from interfering with the connecting plate 21.

[0071] In some possible implementation schemes, an avoidance hole 2221 is provided on the lifting fitting plate 222. In the folded state, the limit block 212 is accommodated in the avoidance hole 2221, and the limit block 212 will not collide with the lifting fitting plate 222 and will not block the rotation of the lifting fitting 22.

[0072] In some possible implementations, a magnetic attraction component 214 is provided on the connecting plate 21. In the folded state, the hanging fitting 22 is close to or in contact with the magnetic attraction component, and the magnetic attraction component and the hanging fitting 22 are magnetically attracted to each other, so that the hanging fitting 22 remains in the folded state and does not rotate and extend out of the surface of the battery box body 1, causing interference with the external structure, thereby improving safety. The magnetic attraction component 214 can be a magnet.

[0073] The embodiment of the present application also provides a battery system, including: a battery box body 1 and the above-mentioned hanging and matching assembly 2, wherein the connecting plate 21 of the hanging and matching assembly 2 is fixedly connected to the surface of the battery box body 1. The connecting plate 21 can be welded to the surface of the battery box shell 11 of the battery box body 1, and the connecting plate 21 can also be connected to the battery box body 1 by fasteners.

[0074] In some possible embodiments, a plurality of lifting cooperation components 2 can be arranged on the battery box body 1, and the respective lifting cooperation components 2 are respectively arranged on two opposite shell walls of the battery box body 1, which can facilitate connection to the lifting equipment and enable the battery box body 1 to be lifted smoothly.

[0075] In some possible embodiments, the surface of the battery box shell 11 of the battery box body 1 has a recessed groove, the connecting plate 21 is located in the recessed groove, and the connecting plate 21 is attached and connected to the bottom wall of the recessed groove. In the folded state, at least a part of the lifting cooperation member 22 is embedded in the recessed groove, and in the unfolded state, the lifting cooperation member 22 extends out of the recessed groove. The setting of the recessed groove can facilitate the accommodation of the lifting cooperation member 22 and prevent the lifting cooperation member 22 from protruding too much from the surface of the battery box body 1, thereby avoiding interference with the structures in the surrounding environment.

[0076] Embodiment III

[0077] See Figures 1 to 5 As shown, the embodiments of the present application will further describe the battery system in detail, which includes: a battery box body 1, a lifting cooperation component 2, a bottom beam 3, and a fixing cooperation component 4. The lifting cooperation component 2 is connected to the battery box body 1, the bottom beam 3 is connected to the battery box body 1, a guiding cooperation part is arranged on the bottom beam 3, the fixing cooperation component 4 is arranged on the bottom beam 3, and the fixing cooperation component 4 has a pressing strip cooperation groove. The pressing strip can pass through the pressing strip cooperation grooves on each fixing cooperation component 4, and the pressing strip can be detachably fixed to the agricultural machinery vehicle body, thereby realizing the connection between the agricultural machinery battery system and the agricultural machinery vehicle body. When it is necessary to disassemble the agricultural machinery battery system, the connection structure between the pressing strip and the agricultural machinery vehicle body can be released to transfer the battery system.

[0078] The battery system of the present application can be an agricultural machinery battery system. The agricultural machinery battery system can be conveniently and quickly assembled to the agricultural machinery vehicle body by setting the fixing cooperation component 4 on the bottom beam 3 and cooperating with the pressing strip, and can also be quickly disassembled from the agricultural machinery vehicle body. The agricultural machinery battery system of the present application is convenient for disassembly and assembly, improving the energy supply efficiency of the agricultural machinery.

[0079] Two bottom beams 3 can be arranged at the bottom of the battery box body 1, the two bottom beams 3 are arranged at intervals and in parallel, at least two fixing cooperation components 4 are respectively arranged on each bottom beam 3, the fixing cooperation components 4 are in a hook shape, each of the two bottom beams 3 corresponds to a pressing strip, and the pressing strip can be pressed into the pressing strip cooperation grooves on each fixing cooperation component 4 on the bottom beam 3 from top to bottom at the same time, which is convenient for operation and has a high disassembly and assembly efficiency.

[0080] In some possible embodiments, the guiding and mating part includes a rough guiding and mating part 31 disposed on the bottom beam 3. The rough guiding and mating part 31 extends longitudinally and has a guiding inclined surface. A rough guiding part is correspondingly provided on the agricultural machinery body for the rough guiding and mating part 31. During the process of the battery box falling from top to bottom into the agricultural machinery body under the traction of the crane, the guiding inclined surface of the rough guiding and mating part 31 can slide down along the rough guiding part, and finally, under the guidance of the guiding part, the agricultural machinery battery system accurately and stably seats at the set position. The rough guiding part can be structures such as a frame or a metal frame strip. When the agricultural machinery battery system is installed in place, the rough guiding part can be located inside the bottom beam 3.

[0081] In some possible embodiments, the guiding and mating part includes a fine guiding and mating part 32. The fine guiding and mating part 32 includes a jack disposed on the bottom beam 3.

[0082] A fine guiding part is provided on the agricultural machinery body. The fine guiding part can be a cylinder. During the process of the battery box falling from top to bottom into the agricultural machinery body under the traction of the crane, the guiding inclined surface of the rough guiding and mating part 31 can slide down along the rough guiding part to adjust the position of the battery box body 1, so that the cylinder can be smoothly inserted into the jack on the bottom beam 3, thereby precisely controlling the seating position of the agricultural machinery battery system.

[0083] In some possible embodiments, the battery system includes two bottom beams 3. The two bottom beams 3 are spaced apart and disposed on the battery box body 1. Each of the rough guiding and mating parts 31 and each of the fine guiding and mating parts 32 are sequentially spaced apart along the length direction of the bottom beam 3.

[0084] In some possible embodiments, both the rough guiding and mating part 31 and the fine guiding and mating part 32 are disposed on the bottom surface of the bottom beam 3, and the fixing and mating part 4 is disposed on the side surface of the bottom beam 3, wherein the bottom surface and the side surface are perpendicular to each other. The fixing and mating part 4 is disposed on the side surface of the bottom beam 3 to facilitate cooperation with the pressing strip, and the pressing strip can be bolted to the corresponding position on the agricultural machinery vehicle.

[0085] In some possible embodiments, referring to Figure 5 As shown, the fixing and mating part 4 has a seat body 41 and a hook part 42. The seat body 41 is connected to the bottom beam 3, the hook part 42 is connected to the seat body 41, and the hook part 42 is formed with the pressing strip mating groove. The seat body is fixed to the bottom beam 3 through a fastener, and the fastener can be a bolt.

[0086] In some possible embodiments, a thickened plate 33 is welded to the side surface of the bottom beam 3. Thread grooves are provided on the thickened plate 33. One end of a fastener passes through the seat body 41 and is threadedly connected to the thread grooves, and the cap body of the fastener is limited on the seat body 41. The design of the thickened plate 33 provides space for arranging the thread grooves, facilitating the connection and assembly with the seat body 41.

[0087] In some possible embodiments, at least two of the fixing and cooperating members 4 are provided on each bottom beam 3, and the fixing and cooperating members 4 are sequentially arranged at intervals along the length direction of the bottom beam 3. Thereby, the battery box body 1 can be fixed at the positions at both ends of the bottom beam 3, enabling the overall force of the bottom beam 3 to be balanced, the battery box body 1 to be stable without skew, and improving the assembly structure strength and stability.

[0088] The embodiment of the present application also provides an agricultural machine, including: an agricultural machine body and the above battery system. The agricultural machine body has a guiding and cooperating portion and a pressing strip. The guiding and cooperating portion of the agricultural machine battery system is in limiting cooperation with the guiding portion, the pressing strip penetrates through the pressing strip cooperation groove, and the pressing strip is detachably connected to the agricultural machine body. The assembly structure of the agricultural machine body and the battery system of the agricultural machine has been described in detail above. The agricultural machine body has an electronic control system, and this battery system can be electrically connected to the electronic control system to provide power for the travel and work of the agricultural machine.

[0089] Embodiment Four

[0090] See Figure 6 and Figure 7 As shown, the embodiment of the present application further details the battery system, including: a battery box shell 11, a battery pack, a high-voltage box assembly 13, and a cover body 14. The battery box shell 11 has a cavity and an opening 112 communicating with the cavity. The battery pack is arranged in the cavity, the high-voltage box assembly 13 is arranged in the cavity, the high-voltage box assembly 13 is electrically connected to the battery pack, at least part of the structure of the high-voltage box assembly 13 is exposed to the opening 112, the cover body 14 is detachably connected to the battery box shell 11, and the cover body 14 is used to close or open the opening 112. The agricultural machine battery system of the present application that is convenient for maintenance is provided with an opening 112 on the battery box shell 11, and the opening 112 is covered by the cover body 14. The cover body 14 is detachably arranged, so that the high-voltage box assembly 13 can be conveniently repaired.

[0091] In some possible embodiments, the cover body 14 includes a convex shell 141 and a flanging 142. The flanging 142 is connected to the opening edge of the convex shell 141, and the flanging 142 is detachably connected to the battery box shell 11. The convex shell 141 protrudes outward away from the battery box shell 11, thereby increasing the internal space of the battery box shell 11 and facilitating providing more space for accommodating the high-voltage box assembly 13.

[0092] In some possible embodiments, connection holes are provided at the edges of the opening 112 on the battery box housing 11, and a plurality of fasteners respectively pass through the flanging 142 and are connected to the connection holes. The fasteners can be screws. The studs of the screws pass through the flanging 142 and are connected to the connection holes, and the caps of the screws are limited on the flanging 142. By means of tools, the fasteners can be screwed to tighten or disassemble the fasteners.

[0093] In some possible embodiments, a gasket 15 is covered on the flanging 142. The rod body of the fastener sequentially passes through the gasket 15 and the flanging 142 and is connected to the connection hole, and the cap of the fastener is limited on the gasket 15. The gasket 15 can be a flexible sheet such as rubber. The gasket 15 functions to seal the through holes on the fastener and the flanging 142. A gasket 15 can also be provided between the flanging 142 and the battery box housing 11 to seal the gap therebetween.

[0094] In some possible embodiments, an insulating board 18 is adhesively connected to the inner wall of the convex housing 141. It functions to insulate and isolate the metal convex housing 141 and the high-voltage box assembly 13. The high-voltage box assembly 13 can include devices such as relays, fuses, busbars, and BMS. Among them, at least the BMS is exposed to the opening 112, facilitating the maintenance of the BMS.

[0095] In some possible embodiments, the opening 112 is located at the top of the battery box housing 11, and the high-voltage box assembly 13 is located between the opening 112 and the battery pack. The high-voltage box assembly 13 is located on the top of each battery pack.

[0096] In some possible embodiments, the battery box housing 11 includes a plurality of plate bodies. The plate bodies are connected to each other, and the plate bodies enclose to form a cavity. The high-voltage box assembly 13 and the battery pack are both arranged in the cavity. Among them, adjacent plate bodies are full-welded, improving the sealing performance of the agricultural machinery battery system and meeting the required sealing level.

[0097] In some possible embodiments, referring to Figure 8 As shown, the agricultural machinery battery system convenient for maintenance includes a water cooling unit 5. The water cooling unit 5 is connected to the outer surface of the battery box housing 11, and the water cooling unit 5 is connected to the battery pack through a water cooling pipeline. The water cooling unit 5 is used to adjust the temperature of the battery pack.

[0098] The embodiment of the present application also provides an agricultural machinery at the same time, including: an agricultural machinery vehicle body and the above-mentioned battery system. The battery system is connected to the agricultural machinery vehicle body. The agricultural machinery body has an electric control system, and this agricultural machinery battery system can be electrically connected to the electric control system to provide power for the agricultural machinery to travel and work.

[0099] Embodiment Five

[0100] See Figures 1 to 9 As shown, the embodiments of the present application further illustrate the battery system, which includes: a battery box body 1, a bottom beam 3, a water cooling unit 5, and a battery swapping connector 6. The battery box body 1 has a battery box shell 11 and a battery pack, and the battery pack is disposed inside the battery box shell 11. A hoisting and mating assembly 2 is connected to the battery box shell 11. The bottom beam 3 is connected to the battery box body 1, and the bottom beam 3 is used to detachably connect to an agricultural vehicle body. The water cooling unit 5 is located outside the battery box shell 11, and the water cooling unit 5 is connected to the battery box shell 11. The water cooling unit 5 is connected to the battery pack through a water cooling pipeline. The battery swapping connector 6 is connected to the battery box body 1. The battery swapping connector 6 can be located at the bottom of the battery box body 1. The battery swapping connector 6 is electrically connected to the battery pack. In a state where the agricultural vehicle battery system is installed on the agricultural vehicle body, the battery swapping connector 6 and the agricultural vehicle body are electrically connected. An electrical connector corresponding to the battery swapping connector 6 is provided on the agricultural vehicle body. The electrical connector and the battery swapping connector 6 can be a quick plug structure, which facilitates the connection. The electrical connector can be electrically connected to the electrical control system of the agricultural vehicle body, and the electrical control system of the agricultural vehicle body is powered by the agricultural vehicle battery system to provide driving power for the agricultural vehicle body.

[0101] In some possible implementation schemes, the agricultural vehicle battery system includes a DC / DC module 7. The input end of the DC / DC module 7 is electrically connected to the battery pack, and the output end of the DC / DC module 7 is electrically connected to the water cooling unit 5. The DC / DC module 7 can convert the direct current of the battery pack and provide it to the water cooling unit 5, enabling the water cooling unit 5 to operate normally.

[0102] In some possible implementation schemes, the agricultural vehicle battery system includes a support box shell 8. The support box shell 8 is connected to the battery box shell 11. The support box shell 8 encloses to form an inner cavity, and the DC / DC module 7 is disposed in the inner cavity. The support box shell 8 plays a role in protecting the internal DC / DC module 7. The water cooling unit 5 is supported by the support box, and the water cooling unit 5 is respectively connected to the support box shell 8 and the battery box shell 11. The support box shell 8 has a dual function. In addition to accommodating and protecting the DC / DC module 7, it can also serve as a support structure to support the water cooling unit 5 and increase the installation height of the water cooling unit 5.

[0103] In some possible implementation schemes, heat dissipation holes are provided on the shell wall of the support box shell 8, which is beneficial for the heat dissipation of the internal DC / DC module 7 and the battery swapping connector 6 described below.

[0104] In some possible implementation schemes, see Figure 8 and Figure 9As shown, the support box housing 8 has a bottom wall 81, a top wall 82 and side walls 83. The bottom wall 81 and the top wall 82 are spaced apart, and the side walls 83 connect the top wall 82 and the bottom wall 81. At least one of the bottom wall 81, the top wall 82 and the side walls 83 is connected to the battery box housing 11. The bottom wall 81, the top wall 82 and the side walls 83 enclose to form the inner cavity, and heat dissipation holes are provided on the side walls 83. Since the side walls 83 have less obstruction and heat dissipation holes are provided, the air circulation inside the support box housing 8 can be accelerated.

[0105] In some possible embodiments, the agricultural machinery battery system includes a bracket 84 located inside the inner cavity. The bracket 84 is connected to the bottom wall 81, and the DC / DC module 7 is disposed on the bracket 84.

[0106] The provision of the bracket 84 not only facilitates the installation of the DC / DC module 7, but also increases the installation height of the DC / DC module 7, which is beneficial to the heat dissipation of the DC / DC module 7.

[0107] In some possible embodiments, the bottom wall 81 has a recessed housing portion 811 that is recessed into the inner cavity. The recessed housing portion 811 forms an inner recess cavity. The battery swapping connector 6 is disposed in the inner recess cavity, and at least part of the cable connecting the battery swapping connector 6 is located inside the inner cavity. The battery swapping connector 6 is hidden in the inner recess cavity and does not protrude from the inner recess cavity, thus playing a role in protecting the battery swapping connector 6. When the agricultural machinery battery system is supported on a support surface, the battery swapping connector 6 will not contact the support surface, and the battery swapping connector 6 will not be damaged or deformed under the action of the support surface. The electrical connector on the agricultural machinery vehicle body can be an outwardly protruding structure. In the state where the agricultural machinery battery system is supported on the agricultural machinery vehicle body, the electrical connector is inserted into the inner recess cavity, and the electrical connector is electrically connected to the battery swapping connector 6.

[0108] In some possible embodiments, refer to Figure 3 As shown, the agricultural machinery battery system includes a connecting frame 9 and a water kettle 10. The connecting frame 9 is connected to the top wall 82. The water kettle 10 is located between the connecting frame 9 and the water cooling unit 5, and the water kettle 10 is fixed to the connecting frame 9. The water kettle 10 is connected to the water cooling pipeline.

[0109] The embodiment of the present application also provides an agricultural machinery, including: an agricultural machinery vehicle body and the above battery system. The bottom beam 3 of the agricultural machinery battery system is detachably connected to the agricultural machinery vehicle body.

[0110] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications using the technical content prompted above into equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A water cooling plate, characterized in that: include: A water-cooling plate body, wherein the water-cooling plate body has a plurality of first through holes and a plurality of second through holes; A steel sleeve, the steel sleeve is inserted into the first through hole, and the steel sleeve has a through hole for a fastener to pass through; A threaded sleeve is inserted into the second through hole.

2. The water cooling plate according to claim 1, characterized in that: The water cooling plate body comprises: A main body, the main body having a water channel cavity and openings at both ends of the water channel cavity; A front baffle and a rear baffle, the front baffle and the rear baffle are respectively connected to the two ends of the main board body along the length direction, and the front baffle and the rear baffle respectively block the openings at the two ends of the main board body; The front baffle and the rear baffle are both provided with a first through hole and a second through hole.

3. The water cooling plate according to claim 2, characterized in that: Among the front baffle and the rear baffle, the through hole of the steel sleeve on one is a round hole, and the through hole of the steel sleeve on the other is a long hole.

4. The water cooling plate according to claim 2, characterized in that: The main board body comprises a middle board and side boards located on both sides of the middle board; The middle plate and the side plate are both provided with water channel cavities, and the water channel cavities of the middle plate and the side plate are connected; The middle plate and the side plates are fixed by laser welding.

5. The water cooling plate according to claim 4, characterized in that: The front baffle plate and the rear baffle plate are respectively welded to the middle plate and the side plate by laser welding.

6. The water cooling plate according to claim 1, characterized in that: The steel sleeve includes a pipe body and a flange portion connected to the end of the pipe body; The flange part is attached to the surface of the water-cooling plate body, and the tube body is penetrated through the first through hole.

7. The water cooling plate according to claim 1, characterized in that: The threaded sleeve is a spiral steel wire.

8. The water cooling plate according to claim 1, characterized in that: A plurality of partition ribs are arranged in the water channel cavity of the water cooling plate body to divide the water channel cavity into a plurality of water inlet channels and water outlet channels, each water inlet channel is parallel to each water outlet channel, and the water inlet channels and the water outlet channels are connected, and the water cooling plate body has a water inlet and a water outlet, the water inlet is connected to each of the water inlet channels, and the water outlet is connected to each of the water outlet channels.

9. A battery pack, characterized in that: include: The water cooling plate as claimed in any one of claims 1 to 8; A battery module, wherein the battery module has an end plate, one end of a connecting piece passes through the end plate and is threadedly connected to the threaded sleeve, and the other end of the connecting piece is limited to the end plate.

10. A battery system, characterized in that: include: A battery case having a cavity; A plurality of support plates, each of the support plates being disposed in the cavity; A plurality of battery packs as described in claim 9, wherein the battery packs are supported on the support plate, one end of a fastener passes through the through hole of the steel sleeve and is connected to the support plate, and the other end of the fastener is limited on the steel sleeve.

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