Agricultural machine battery system convenient to maintain and agricultural machine

Abstract

The agricultural machine battery system comprises a battery box shell, a battery pack, a high-voltage box assembly and a cover body, the battery box shell is provided with a cavity and an opening communicated with the cavity, the battery pack is arranged in the cavity, the high-voltage box assembly is arranged in the cavity, and the high-voltage box assembly is arranged in the cavity. The high-voltage box assembly is electrically connected to the battery pack, at least part of the structure of the high-voltage box assembly is exposed out of the opening, the cover body is detachably connected to the battery box shell, and the cover body is used for closing or opening the opening. According to the agricultural machine battery system convenient to maintain, the opening is formed in the battery box shell, the cover body covers the opening, and the cover body is detachably arranged, so that the high-voltage box assembly can be conveniently maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of battery systems, and in particular to an agricultural machinery battery system and agricultural machinery that are easy to maintain. Background Art

[0002] With the advancement of technology, various agricultural machinery has been widely used in agricultural production processes. For example, the application of agricultural machinery such as tillers, seeders, and harvesters has greatly reduced the cost of agricultural production and the labor intensity of agricultural practitioners. At present, agricultural machinery uses traditional internal combustion engines (such as diesel engines and gasoline engines) as a power source to provide power for the operation of agricultural machinery. The fuel efficiency of internal combustion engines (such as diesel and gasoline) is very low during operation. Incomplete combustion of fuel not only wastes the fuel itself, but also produces a large amount of harmful gases. In most agricultural machinery, the harmful gases generated by the internal combustion engine are directly discharged without any treatment, which makes the current agricultural machinery have many defects.

[0003] With the rapid development of power equipment, electric agricultural machinery, as a device that consumes clean electricity, is increasingly valued for its cleanliness. Existing electric agricultural machinery consists of a main body and a battery system, which is fixedly mounted on the main body. The battery system typically includes a battery box and a high-voltage box. In the prior art, to simplify the structure, the high-voltage box is often also installed inside the battery box. In the event of a high-voltage box failure, the battery box housing must be removed to expose the high-voltage box for inspection and maintenance. This increases the difficulty of maintenance and contributes to high maintenance costs. Utility Model Content

[0004] In order to solve one of the above technical problems, the utility model provides an agricultural machinery battery system and agricultural machinery that are easy to maintain, which can facilitate the maintenance of the high-voltage box assembly and reduce maintenance costs.

[0005] The utility model adopts the following technical solutions:

[0006] The first object of this application is to provide an agricultural machinery battery system that is easy to maintain, comprising:

[0007] A battery case having a cavity and an opening communicating with the cavity;

[0008] a battery pack, the battery pack being disposed in the cavity;

[0009] a high-voltage box assembly, the high-voltage box assembly being disposed in the cavity, the high-voltage box assembly being electrically connected to the battery pack, and at least a portion of the high-voltage box assembly being exposed to the opening;

[0010] A cover body is detachably connected to the battery box shell and is used to close or open the opening.

[0011] Optionally, the cover body includes a convex shell and a flange, and the flange is connected to the opening edge of the convex shell;

[0012] The flange is detachably connected to the battery box shell.

[0013] Optionally, a connection hole is provided on the edge of the opening of the battery box shell;

[0014] A plurality of fasteners pass through the flanges and are connected to the connection holes respectively.

[0015] Optionally, the flange is covered with a sealing gasket, the rod of the fastener passes through the sealing gasket and the flange in sequence and is connected to the connecting hole, and the cap body of the fastener is limited on the sealing gasket.

[0016] Optionally, an insulating plate is fitted and connected to the inner wall of the convex shell.

[0017] Optionally, the high voltage box assembly includes a relay, a fuse, a copper busbar and a BMS;

[0018] At least the BMS is exposed to the opening.

[0019] Optionally, the opening is located at the top of the battery box shell;

[0020] The high voltage box assembly is located between the opening and the battery pack.

[0021] Optionally, the battery box shell includes a plurality of plates, each of which is connected to form a cavity, and the high-voltage box assembly and the battery pack are both arranged in the cavity, wherein adjacent plates are fully welded.

[0022] Optionally, the easily maintained agricultural machinery battery system includes a water cooling unit connected to the outer surface of the battery box shell, and the water cooling unit is connected to the battery pack through a water cooling pipeline.

[0023] The second object of the present application is to provide an agricultural machine, comprising:

[0024] agricultural machinery bodies;

[0025] The above-mentioned agricultural machinery battery system that is easy to maintain is connected to the agricultural machinery body.

[0026] By adopting the above technical solution, this application has the following beneficial effects:

[0027] The agricultural machinery battery system that is easy to maintain of the present application is provided with an opening on the battery box shell, and the opening is covered by a cover body. The cover body is detachable, thereby facilitating the maintenance of the high-voltage box assembly.

[0028] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0030] Figure 1 A schematic diagram of the three-dimensional structure of the agricultural machinery battery system provided in an embodiment of the present application is shown;

[0031] Figure 2 A partial structural diagram of the agricultural machinery battery system provided in an embodiment of the present application is shown;

[0032] Figure 3 A schematic diagram showing a lifting fitting member of a lifting fitting group on an agricultural machinery battery system provided by an embodiment of the present application in an expanded state;

[0033] Figure 4 A bottom view of the agricultural machinery battery system provided by an embodiment of the present application is shown;

[0034] Figure 5 A schematic structural diagram of a fixed fitting provided on a bottom beam of an agricultural machinery battery system according to an embodiment of the present application is shown;

[0035] Figure 6 The top structure diagram of the agricultural machinery battery system provided by the embodiment of the present application is shown;

[0036] Figure 7 A schematic diagram showing a cover of an agricultural machinery battery system provided by an embodiment of the present application in a detached state;

[0037] Figure 8 A bottom view showing a partial structure of the agricultural machinery battery system provided by an embodiment of the present application;

[0038] Figure 9 A partial structural diagram of the agricultural machinery battery system provided in an embodiment of the present application is shown;

[0039] Figure 10 A schematic diagram of the internal structure of the agricultural machinery battery system provided in an embodiment of the present application is shown;

[0040] Figure 11 A schematic structural diagram of a water cooling plate of an agricultural machinery battery system provided in an embodiment of the present application is shown;

[0041] Figure 12 A partial structural diagram of a water-cooling plate of an agricultural machinery battery system provided in an embodiment of the present application is shown;

[0042] Figure 13 A schematic diagram of the internal structure of the water cooling plate of the agricultural machinery battery system provided in an embodiment of the present application is shown.

[0043] 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; 141. Convex shell; 142. Flanged edge; 15. Sealing gasket; 16. Water cooling plate; 16a. Water inlet channel; 16b. Water outlet channel; 16c. Water inlet; 16d. Water outlet; 161. Main body; 1611. Middle plate; 1612. Side plate; 162. Front baffle; 163. Rear baffle; 164. Steel sleeve; 1641. Tube; 1642. Flange; 165. Threaded sleeve; 17. Support plate; 18. Insulation plate; 2. Hoisting and matching group Parts; 21. Connecting plate; 211. Shaft; 212. Limit block; 213. Avoidance; 214. Magnetic component; 22. Lifting fitting; 221. Sleeve; 222. Lifting fitting plate; 2221. Avoidance hole; 223. Locking fitting; 23. Elastic part; 3. Bottom beam; 31. Coarse guide fitting; 32. Fine guide fitting; 33. Thickening plate; 4. Fixed fitting; 41. Base; 42. Hook; 5. Water cooling unit; 6. Power exchange connector; 7. DC / DC module; 8. Support box shell; 81. Bottom wall; 811. Recessed shell; 82. Top wall; 83. Side wall; 84. Bracket; 9. Connecting frame; 10. Kettle.

[0044] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the 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.

[0046] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0047] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0048] Example 1

[0049] See also Figure 6 and Figure 7 As shown, an embodiment of the present application provides an agricultural machinery battery system that is easy to maintain, comprising: a battery box shell 11, a battery pack, a high-voltage box assembly 13 and a cover 14. The battery box shell 11 has a cavity and an opening 112 connected to 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 at the opening 112. The cover 14 is detachably connected to the battery box shell 11. The cover 14 is used to close or open the opening 112. The agricultural machinery battery system that is easy to maintain of the present application is provided with an opening 112 on the battery box shell 11, and the opening 112 is covered by the cover 14. The cover 14 is detachably arranged, so that the high-voltage box assembly 13 can be easily maintained.

[0050] In some possible embodiments, the cover 14 includes a convex shell 141 and a flange 142. The flange 142 is connected to the opening edge of the convex shell 141 and is detachably connected to the battery case 11. The convex shell 141 protrudes outward toward the side away from the battery case 11, thereby increasing the internal space of the battery case 11 and providing more space for accommodating the high-voltage box assembly 13.

[0051] In some possible embodiments, the battery housing 11 is provided with connection holes along the edge of the opening 112. A plurality of fasteners are connected to the connection holes through the flanges 142. The fasteners may be screws, with the studs of the screws passing through the flanges 142 and connected to the connection holes. The caps of the screws are retained by the flanges 142. The fasteners can be tightened or removed by turning with the aid of a tool.

[0052] In some possible embodiments, the flange 142 is covered with a sealing gasket 15. The rod of the fastener sequentially passes through the sealing gasket 15 and the flange 142 to connect to the connection hole, and the cap of the fastener is restrained on the sealing gasket 15. The sealing gasket 15 can be a flexible sheet such as rubber, and serves to seal the fastener and the through-hole in the flange 142. The sealing gasket 15 can also be provided between the flange 142 and the battery case 11 to seal the gap between them.

[0053] In some possible embodiments, an insulating plate 18 is attached to the inner wall of the convex housing 141. This serves to insulate the metal convex housing 141 from the high-voltage box assembly 13. The high-voltage box assembly 13 may include components such as relays, fuses, copper busbars, and a BMS. At least the BMS is exposed through the opening 112, thereby facilitating maintenance of the BMS.

[0054] In some possible implementations, the opening 112 is located at the top of the battery case 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 at the top of each battery pack.

[0055] In some possible implementation schemes, the battery box shell 11 includes multiple plates, each of which is connected to form a cavity, and the high-voltage box assembly 13 and the battery pack are both arranged in the cavity, wherein adjacent plates are fully welded, thereby improving the sealing of the agricultural machinery battery system and meeting the required sealing level.

[0056] In some possible implementations, see Figure 8 As shown, the easily maintainable agricultural machinery battery system includes a water cooling unit 5, which is connected to the outer surface of the battery box shell 11 and is connected to the battery pack via a water cooling pipe. The water cooling unit 5 is used to regulate the temperature of the battery pack.

[0057] The present application also provides an agricultural machine comprising: an agricultural machine body and the above-mentioned agricultural machine battery system, wherein the agricultural machine battery system is connected to the agricultural machine body. The agricultural machine body has an electronic control system, and the agricultural machine battery system can be electrically connected to the electronic control system to provide power for the agricultural machine to move and operate.

[0058] Example 2

[0059] See also Figures 1 to 3As shown, the embodiment of the present application describes in detail the agricultural machinery battery system, which has a lifting and fitting assembly 2, including: a connecting plate 21 and a lifting and fitting member 22. The connecting plate 21 is used for connection and fixing. For example, the connecting plate 21 can be fixed to the battery box shell 11. The lifting and fitting member 22 is rotatably connected to the connecting plate 21. The lifting and fitting member 22 has an unfolded state and a folded state. In the unfolded state, Figure 3 As shown, the lifting fitting 22 is rotated to be perpendicular to the connecting plate 21. In the folded state, see Figure 1 As shown, the lifting fitting 22 is rotated until the angle between it and the connecting plate 21 is less than a set value. For example, the lifting fitting 22 can be rotated to fit the outer surface of the battery box body 1 or fit on the connecting plate 21, or the lifting fitting 22 can be rotated to be parallel to the connecting plate 21. The angle between the lifting fitting 22 and the connecting plate 21 can be greater than or equal to 0 and less than 20 degrees.

[0060] The hoisting assembly 2 of the present application has a folded state and an unfolded state. When the battery box needs to be hoisted and transported, the hoisting 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 assembly 2 can be folded to prevent the hoisting assembly 22 from colliding with the outside world, thereby improving safety.

[0061] In some possible embodiments, the connecting plate 21 is provided with a shaft 211, and the hoisting fitting 22 comprises a sleeve 221 and a hoisting fitting plate 222. The sleeve 221 is rotatably mounted on the shaft 211, and the hoisting fitting plate is connected to the sleeve 221. The hoisting fitting plate 222 is provided with a hoisting fitting hole that facilitates connection with a crane and provides a crane lifting point. The hoisting fitting 22 can be adjusted to an expanded or folded state by rotating the sleeve 221 about the shaft 211.

[0062] In some possible embodiments, two limit blocks 212 are provided on the connecting plate 21, and the two limit blocks 212 are spaced apart. The sleeve 221 is located between the two limit blocks 212, or in other words, the sleeve 221 passes through the space between the two limit blocks 212, and the extension direction of the sleeve 221 is perpendicular to the arrangement direction of the two limit 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 211, so that the locking fitting portion 223 moves between the two limit blocks 212. The two limit blocks 212 and the locking fitting portion 223 are limited and matched 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 the hoisting equipment. The facing surfaces of the two limit blocks 212 can be flat surfaces, and the sides of the locking fitting 223 can also be flat surfaces. In the unfolded state, the flat surfaces of the locking fitting 223 along the thickness direction of the hanging fitting plate 222 are respectively in contact with or have a small gap with the flat surfaces of the two limit blocks 212, thereby restricting the hanging fitting 22 to remain in the unfolded state. In the folded state, the hanging fitting 22 translates along the shaft 211, so that the locking fitting 223 is released from the limited space between the two limit blocks 212, and the hanging fitting 22 is rotated and folded onto the outer surface of the battery box body 1.

[0063] In some possible embodiments, the lifting and fitting assembly 2 includes an elastic member 23, which is sleeved on the shaft 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 lifting and fitting member 22 and the limit block 212 are limited and fitted, and the elastic member 23 is in a compressed state. When the lifting and fitting member 22 is rotated to a state perpendicular to the connecting plate 21, the elastic member 23 is elastically released, pushing the sleeve 221 to move along the shaft 211, so that the locking fitting portion 223 moves between the two limit blocks 212.

[0064] In the folded state, the lifting fitting 22 and the connecting plate 21 are limited and matched, and the elastic part 23 is in a compressed state. When the lifting fitting 22 is rotated to a state perpendicular to the connecting plate 21, the elastic part 23 is elastically released and pushes the lifting fitting 22 upward, so that the locking fitting part 223 moves between the two limit blocks 212.

[0065] The connecting plate 21 can be provided with two end seats, with the ends of the shaft 211 connected to the two end seats. The elastic member 23 can be a spring, which is mounted on the shaft 211, and the ends of the spring respectively abut against the lower end seat and sleeve 221. When the lifting fitting 22 is rotated to a position perpendicular to the connecting plate 21, the elastic member 23 is elastically released, pushing the sleeve 221 upward along the shaft 211, so that the sleeve 221 contacts the top end seat. At this time, the locking fitting 223 moves exactly between the two limit blocks 212.

[0066] 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.

[0067] In some possible embodiments, 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, thereby preventing interference between the locking fitting portion 223 and the connecting plate 21.

[0068] 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. The limit block 212 will not collide with the lifting fitting plate 222 and will not block the rotation of the lifting fitting 22.

[0069] In some possible embodiments, a magnetic component 214 is provided on the connecting plate 21. When the hanging fitting 22 is in the folded state, the magnetic 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 beyond the surface of the battery box body 1, thereby preventing interference with external structures. This improves safety. The magnetic component 214 may be a magnet.

[0070] The present application also provides an agricultural machinery battery system, comprising: a battery box body 1 and the aforementioned hoisting assembly 2, wherein a connecting plate 21 of the hoisting 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, or the connecting plate 21 can be connected to the battery box body 1 by fasteners.

[0071] In some possible implementation schemes, multiple lifting and matching components 2 can be set on the battery box body 1. Each lifting and matching component 2 is arranged on two opposite shell walls of the battery box body 1, which can be easily connected to the lifting equipment and can be lifted stably.

[0072] In some possible embodiments, the battery case shell 11 of the battery case body 1 has a recessed groove on its surface, the connecting plate 21 is located within the recessed groove, and the connecting plate 21 is closely connected to the bottom wall of the recessed groove. In the folded state, the hanging fitting 22 is at least partially embedded in the recessed groove, and in the unfolded state, the hanging fitting 22 extends out of the recessed groove. The provision of the recessed groove can conveniently accommodate the hanging fitting 22, preventing the hanging fitting 22 from protruding too much from the surface of the battery case body 1, which may easily interfere with structures in the surrounding environment.

[0073] Example 3

[0074] See also Figures 1 to 5 As shown, the embodiment of the present application provides a detailed description of the agricultural machinery battery system, which includes: a battery box body 1, a hoisting fitting assembly 2, a bottom beam 3 and a fixed fitting member 4. The hoisting fitting assembly 2 is connected to the battery box body 1, the bottom beam 3 is connected to the battery box body 1, the bottom beam 3 is provided with a guide fitting portion, the fixed fitting member 4 is provided on the bottom beam 3, and the fixed fitting member 4 has a pressure strip fitting groove. The pressure strip can pass through the pressure strip fitting grooves on each fixed fitting member 4, and the pressure strip can be detachably fixed to the agricultural machinery body, thereby realizing the connection between the agricultural machinery battery system and the agricultural machinery body. When the agricultural machinery battery system needs to be disassembled, the agricultural machinery battery system can be transported by releasing the connection structure between the pressure strip and the agricultural machinery body.

[0075] The agricultural machinery battery system of the present application can be an agricultural machinery battery system. By providing a fixing fitting 4 on the bottom beam 3, the agricultural machinery battery system can be conveniently and quickly assembled on the agricultural machinery body in conjunction with the pressure strip, and can also be conveniently and quickly removed from the agricultural machinery body. The agricultural machinery battery system of the present application is easy to assemble and disassemble, thereby improving the energy supply efficiency of the agricultural machinery.

[0076] Two bottom beams 3 can be set at the bottom of the battery box body 1. The two bottom beams 3 are set at intervals and in parallel. At least two fixed fittings 4 are set on each bottom beam 3. The fixed fittings 4 are hook-shaped. The two bottom beams 3 correspond to a pressure strip respectively. The pressure strip can be pressed into the pressure strip fitting groove on each fixed fitting 4 on the bottom beam 3 from top to bottom at the same time, which is convenient to operate and has high disassembly and assembly efficiency.

[0077] In some possible implementations, the guide fitting portion includes a coarse guide fitting portion 31 provided on the bottom beam 3, the coarse guide fitting portion 31 extending longitudinally and having a guide slope. A coarse guide portion is provided on the agricultural machinery body corresponding to the coarse guide fitting portion 31. When the battery box is pulled downward from the top into the agricultural machinery body by a crane, the guide slope of the coarse guide fitting portion 31 can slide down along the coarse guide portion, and ultimately, under the guidance of the guide portion, the agricultural machinery battery system is accurately and stably seated at the set position. The coarse guide portion can be a structure such as a frame or a metal frame bar. When the agricultural machinery battery system is installed, the coarse guide portion can be located on the inner side of the bottom beam 3.

[0078] In some possible implementation schemes, the guide fitting portion includes a precision guide fitting portion 32 , and the precision guide fitting portion 32 includes a socket provided on the bottom beam 3 .

[0079] A fine guide portion is provided on the agricultural machinery body, and the fine guide portion can be a cylinder. When the battery box falls from top to bottom into the agricultural machinery body under the traction of the crane, the guide slope of the coarse guide matching portion 31 can slide down along the coarse guide portion to adjust the position of the battery box body 1 so that the cylinder can be smoothly inserted into the socket on the bottom beam 3, thereby accurately controlling the seating position of the agricultural machinery battery system.

[0080] In some possible implementation schemes, the agricultural machinery battery system includes two bottom beams 3, which are arranged at intervals on the battery box body 1, and each of the coarse guide fitting parts 31 and each of the fine guide fitting parts 32 are arranged in sequence at intervals along the length direction of the bottom beam 3.

[0081] In some possible implementations, the coarse guide mating portion 31 and the fine guide mating portion 32 are both disposed on the bottom surface of the bottom beam 3, and the fixed mating member 4 is disposed on a side surface of the bottom beam 3, wherein the bottom surface and the side surface are perpendicular. The fixed mating member 4 disposed on the side surface of the bottom beam 3 facilitates mating with a pressure strip, which can be bolted to a corresponding position on the agricultural vehicle.

[0082] In some possible implementations, see Figure 5 As shown, the fixed fitting 4 has a seat body 41 and a hook portion 42, the seat body 41 is connected to the bottom beam 3, the hook portion 42 is connected to the seat body 41, and the hook portion 42 is formed with the pressure strip fitting groove, and the seat body is fixed to the bottom beam 3 by a fastener, which can be a bolt.

[0083] In some possible implementations, a thickened plate 33 is welded to the side surface of the bottom beam 3. The thickened plate 33 is provided with a threaded groove. One end of a fastener passes through the base body 41 and is threadedly connected to the threaded groove. The cap of the fastener is restrained on the base body 41. The design of the thickened plate 33 provides space for the threaded groove, facilitating connection and assembly with the base body 41.

[0084] In some possible implementations, at least two fixing fittings 4 are provided on each bottom beam 3, and the fixing fittings 4 are sequentially spaced along the length of the bottom beam 3. This allows the battery box body 1 to be fixed at both ends of the bottom beam 3, ensuring balanced force on the bottom beam 3 as a whole. The battery box body 1 is stable and prevents tilting, thereby improving the strength and stability of the assembly structure.

[0085] The present application also provides an agricultural machine comprising: an agricultural machine body and the aforementioned agricultural machine battery system. The agricultural machine body comprises a guide mating portion and a pressure strip. The guide mating portion of the agricultural machine battery system is engaged with the guide portion. The pressure strip extends through the pressure strip engagement groove and is detachably connected to the agricultural machine body. The assembly structure of the agricultural machine body and the agricultural machine battery system has been described in detail above. The agricultural machine body comprises an electronic control system, and the agricultural machine battery system can be electrically connected to the electronic control system to provide power for the movement and operation of the agricultural machine.

[0086] Example 4

[0087] See also Figures 10 to 13 As shown, this application provides a detailed description of the water-cooling plate 16 of the battery pack, which includes: a water-cooling plate body, a steel sleeve 164, and a threaded sleeve 165. The water-cooling plate body has a plurality of first through holes and a plurality of second through holes, the steel sleeve 164 is inserted into the first through holes, the steel sleeve 164 has a through hole for a fastener to pass through, and the threaded sleeve 165 is inserted into the second through holes.

[0088] 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 to the support plate 17 of the battery box. In the present application, by providing the threaded sleeve 165 on the water-cooling plate body, the threaded sleeve 165 and the battery module 12 can be easily connected and fixed. By providing the steel sleeve 164 on the water-cooling plate body, the fasteners can be easily passed through the steel sleeve 164 to fix the water-cooling plate 16 to the support plate 17 in the battery box shell 11. The fasteners will not directly contact the water-cooling plate 16, preventing the water-cooling plate 16 from being squeezed, deformed, and worn, thereby improving product reliability and extending product life.

[0089] In some possible implementations, the water cooling plate body includes: a main plate 161, a front baffle 162, and a rear baffle 163. The main plate 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 the main plate 161 at both ends along the length direction. The front baffle 162 and the rear baffle 163 respectively block the openings at both ends of the main plate 161. The front baffle 162 and the rear baffle 163 are both provided with a first through hole and a second through hole. This allows the front baffle 162 and the rear baffle 163 on both sides of the main plate 161 to be easily connected to the battery module 12 and to be easily fixed to the support plate 17 of the battery box.

[0090] In some possible implementation schemes, the through hole of the steel sleeve 164 on one of the front baffle 162 and the rear baffle 163 is a circular hole, and the through hole of the steel sleeve 164 on the other one is a long hole.

[0091] By setting a long strip hole on one of the front baffle 162 and the rear baffle 163, the product manufacturing accuracy and assembly accuracy can be reduced. When the steel sleeve 164 of the baffle on one side is fixed to the connecting hole on the support plate 17 by fasteners, the through hole of the steel sleeve 164 of the baffle on the other side is long and strip-shaped, avoiding misalignment with the connecting hole on the other side of the support plate 17. By adjusting the position of the fastener in the through hole along the length direction, it can be smoothly connected to the corresponding connecting hole on the support plate 17.

[0092] In some possible embodiments, the main body 161 includes a central plate 1611 and side plates 1612 located on either side of the central plate 1611. Both the central plate 1611 and the side plates 1612 are provided with water channel cavities, which are interconnected. The central plate 1611 and the side plates 1612 are secured together via laser welding. Dividing the main body into three plates reduces the area of ​​each plate, facilitating production. Furthermore, laser welding of the individual plates provides a strong structure, aesthetically pleasing welds, high strength, and excellent corrosion resistance.

[0093] In some possible implementations, the front baffle 162 and the rear baffle 163 are laser welded to the middle plate 1611 and the side plate 1612, respectively. All structural components of the water-cooling plate 16 are laser welded, improving the overall quality of the product.

[0094] In some possible implementations, see Figure 12As shown, the steel sleeve 164 includes a tube 1641 and a flange 1642 connected to the end of the tube 1641. The flange 1642 is attached to the surface of the water-cooling plate body, and the tube 1641 is inserted into the first through-hole. The rod of the fastener passes through the tube 1641, and the cap of the fastener is restrained by the flange 1642. The fastener does not contact the water-cooling plate body, thus preventing wear on the water-cooling plate body.

[0095] In some possible implementation schemes, the threaded sleeve 165 may be a nut or a spiral steel wire.

[0096] In some possible implementations, see Figure 13 As shown, the water channel cavity of the water-cooled plate body is provided with multiple partitions to divide the cavity into multiple water inlet channels 16a and water outlet channels 16b. Each water inlet channel 16a is parallel to each water outlet channel 16b and is interconnected. The water-cooled plate body has a water inlet 16c and a water outlet 16d. The water inlet 16c is interconnected with each water inlet channel 16a, and the water outlet 16d is interconnected with each water outlet channel 16b. The multiple water inlet channels and the multiple water outlet channels are interconnected at one end of the water-cooled plate 16, resulting in fewer water flow paths, lower water flow resistance, and higher water flow, thereby improving cooling efficiency.

[0097] An 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 having an end plate 121, one end of the connecting member passing through the end plate 121 and being threadedly connected to the threaded sleeve 165, and the other end of the connecting member being limited to the end plate 121.

[0098] 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 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.

[0099] The embodiment of the present application also provides an agricultural machinery battery system, comprising: a battery box shell 11, multiple support plates 17, and multiple battery packs. The battery box shell 11 has a cavity, each of the support plates 17 is disposed in the cavity, and the battery pack is supported by the support plates 17. One end of a 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 to the steel sleeve 164. The cap of the fastener is in direct contact with the steel sleeve 164, and does not contact the water-cooling plate body, so it does not wear the water-cooling plate body. Its cap is in contact with the steel sleeve 164, and the steel sleeve 164 is inserted into the first through hole. The peripheral wall of the steel sleeve 164 is in contact with the inner wall of the first through hole, so that the force on the water-cooling plate body is balanced and not easily deformed.

[0100] Example 5

[0101] See also Figures 1 to 9 As shown, the embodiment of the present application further illustrates the agricultural machinery battery system, which includes: a battery box body 1, a bottom beam 3, a water cooling unit 5 and a power exchange connector 6. The battery box body 1 has a battery box shell 11 and a battery pack, the battery pack is arranged inside the battery box shell 11, the hoisting matching assembly 2 is connected to the battery box shell 11, the bottom beam 3 is connected to the battery box body 1, the bottom beam 3 is used to be detachably connected to the agricultural machinery 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 power exchange connector 6 is connected to the battery box body 1, the power exchange connector 6 can be located at the bottom of the battery box body 1, the power exchange connector 6 is electrically connected to the battery pack, and when the agricultural machinery battery system is installed on the agricultural machinery body, the power exchange connector 6 is electrically connected to the agricultural machinery body. The agricultural machinery body is provided with an electrical connector corresponding to the battery swap connector 6. The electrical connector and the battery swap connector 6 can be quick-plug structures to facilitate connection. The electrical connector can be electrically connected to the agricultural machinery body's electronic control system, and the agricultural machinery battery system can supply power to the agricultural machinery body's electronic control system, providing the agricultural machinery body with driving power.

[0102] In some possible implementations, the agricultural machinery battery system includes a DC / DC module 7, the input of which is electrically connected to the battery pack, and the output of which is electrically connected to the water cooling unit 5. The DC / DC module 7 can transform the DC power from the battery pack and provide it to the water cooling unit 5, enabling the water cooling unit 5 to operate normally.

[0103] In some possible implementations, the agricultural machinery battery system includes a support housing 8, which is connected to the battery housing 11. The support housing 8 encloses an inner cavity, within which the DC / DC module 7 is disposed. The support housing 8 protects the internal DC / DC module 7. The water-cooling unit 5 is supported by the support housing, and the water-cooling unit 5 is connected to the support housing 8 and the battery housing 11, respectively. The support housing 8 serves a dual purpose: in addition to accommodating and protecting the DC / DC module 7, it also serves as a support structure, supporting the water-cooling unit 5 and increasing its installation height.

[0104] In some possible implementation schemes, heat dissipation holes are opened on the shell wall of the supporting box shell 8, which can facilitate heat dissipation of the internal DC / DC module 7 and the power exchange connector 6 below.

[0105] In some possible implementations, see Figure 8 and Figure 9As shown, the support box housing 8 has a bottom wall 81, a top wall 82, and a side wall 83. The bottom wall 81 and the top wall 82 are spaced apart, and the side wall 83 connects the top wall 82 and the bottom wall 81. At least one of the bottom wall 81, the top wall 82, and the side wall 83 is connected to the battery box housing 11. The bottom wall 81, the top wall 82, and the side wall 83 enclose the inner cavity, and the heat dissipation holes are provided on the side wall 83. The side wall 83 is less obstructed, and the heat dissipation holes can accelerate air circulation inside the support box housing 8.

[0106] In some possible implementations, the agricultural machinery battery system includes a bracket 84 , the bracket 84 is located in 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 .

[0107] 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 , thereby facilitating heat dissipation of the DC / DC module 7 .

[0108] In some possible implementation schemes, the bottom wall 81 has a recessed shell portion 811 recessed toward the inner cavity, and the recessed shell portion 811 forms an inner concave cavity, and the power exchange connector 6 is arranged in the inner concave cavity, and the cable connecting the power exchange connector 6 is at least partially located in the inner cavity. The power exchange connector 6 is hidden in the inner concave cavity and does not protrude from the inner concave cavity, thereby protecting the power exchange connector 6. When the agricultural machinery battery system is supported on the supporting surface, the power exchange connector 6 will not contact the supporting surface, and the power exchange connector 6 will not be damaged or deformed under the action of the supporting surface. The electrical connector on the agricultural machinery body can be an outward-convex structure. When the agricultural machinery battery system is supported on the agricultural machinery body, the electrical connector is inserted into the inner concave cavity, and the electrical connector and the power exchange connector 6 are electrically connected.

[0109] In some possible implementations, see Figure 3 As shown, the agricultural machinery battery system includes a connecting frame 9 and a water bottle 10. The connecting frame 9 is connected to the top wall 82. The water bottle 10 is located between the connecting frame 9 and the water cooling unit 5. The water bottle 10 is fixed to the connecting frame 9 and is connected to the water cooling pipeline.

[0110] The embodiment of the present application also provides an agricultural machine, including: an agricultural machine body and the above-mentioned agricultural machine battery system, wherein the bottom beam 3 of the agricultural machine battery system is detachably connected to the agricultural machine body.

[0111] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A battery system for agricultural machinery that is easy to maintain, characterized in that: include: A battery case having a cavity and an opening communicating with the cavity; a battery pack, the battery pack being disposed in the cavity; a high-voltage box assembly, the high-voltage box assembly being disposed in the cavity, the high-voltage box assembly being electrically connected to the battery pack, and at least a portion of the high-voltage box assembly being exposed to the opening; A cover body is detachably connected to the battery box shell and is used to close or open the opening.

2. The easy-to-maintain agricultural machinery battery system according to claim 1, characterized in that: The cover body includes a convex shell and a flange, and the flange is connected to the opening edge of the convex shell; The flange is detachably connected to the battery box shell.

3. The easy-to-maintain agricultural machinery battery system according to claim 2, characterized in that: The battery box shell is provided with a connection hole at the edge of the opening; A plurality of fasteners pass through the flanges and are connected to the connection holes respectively.

4. The easy-to-maintain agricultural machinery battery system according to claim 3, characterized in that: The flange is covered with a sealing gasket, the rod of the fastener passes through the sealing gasket and the flange in sequence and is connected to the connecting hole, and the cap of the fastener is limited on the sealing gasket.

5. The easy-to-maintain agricultural machinery battery system according to claim 2, characterized in that: An insulating plate is fitted and connected to the inner wall of the convex shell.

6. The easy-to-maintain agricultural machinery battery system according to claim 1, characterized in that: The high voltage box assembly includes a relay, a fuse, a copper busbar and a BMS; At least the BMS is exposed to the opening.

7. The easy-to-maintain agricultural machinery battery system according to claim 1, characterized in that: The opening is located at the top of the battery box shell; The high voltage box assembly is located between the opening and the battery pack.

8. The easy-to-maintain agricultural machinery battery system according to claim 1, characterized in that: The battery box shell includes a plurality of plates, each of which is connected to form a cavity. The high-voltage box assembly and the battery pack are both arranged in the cavity, wherein adjacent plates are fully welded.

9. The easy-to-maintain agricultural machinery battery system according to claim 8, characterized in that: It includes a water cooling unit, which is connected to the outer surface of the battery box shell and is connected to the battery pack through a water cooling pipeline.

10. An agricultural machine, characterized in that: include: agricultural machinery bodies; The easily maintainable agricultural machinery battery system according to any one of claims 1 to 9, wherein the easily maintainable agricultural machinery battery system is connected to the agricultural machinery body.

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