Battery system capable of being installed in sinking mode and vehicle

Abstract

The invention discloses a battery system capable of being installed in a sinking mode and a vehicle, the battery system comprises a mounting plate and a plurality of battery boxes, the battery boxes are arranged on the two sides of the mounting plate in the thickness direction respectively, the battery boxes are fixed to the mounting plate, mounting cavities are formed in the battery boxes, and battery modules are arranged in the mounting cavities. According to the battery system, the battery boxes are arranged on the two sides of the mounting plate in the thickness direction correspondingly, the mounting plate is located in the middle or close to the middle of the battery system in the height direction, the mounting plate is connected with the vehicle frame of the vehicle, the battery boxes at the bottom of the mounting plate are embedded into the vehicle frame of the vehicle, and sunken mounting of the batteries is achieved; the installation height of the battery system is obviously reduced, and the space utilization rate of the vehicle is improved. According to the battery system, the modular design is adopted, various electric quantity configurations can be flexibly extended by carrying the battery boxes with different numbers of battery modules through the mounting plate, the universality of the battery system is improved, and battery resource allocation and reuse among equipment with different tonnages in the later period are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery system, and in particular to a sinkable installed battery system and vehicle. BACKGROUND

[0002] With the rapid development of new energy, electric engineering machinery gradually replaces traditional refueling engineering machinery and is applied to various construction fields. Electric engineering machinery has the advantages of low energy consumption, high environmental protection, low failure rate and low maintenance cost, and has a broad application prospect.

[0003] Taking an electric loader as an example, the battery system of the electric loader in the prior art is usually fixed to the frame through fasteners at the bottom. This assembly method requires a higher space for battery arrangement, resulting in a higher overall vehicle height, affecting the arrangement of other structures on the vehicle body, and even making the structural design of the electric loader lower than that of the fuel vehicle, so that the advantages of the electric loader cannot be fully reflected.

[0004] Furthermore, since the power battery is the only power source of the electric engineering machinery, its capacity directly determines the working endurance time. In the prior art, different tonnage electric engineering machinery needs to match different battery systems (or power batteries) with different electric capacities. These battery systems are all separately provided with battery arrangement schemes, and cannot be designed in a platform manner, i.e. each tonnage electric engineering machinery needs to be customized with corresponding batteries and frame matching structures, and the flexibility of battery system design is insufficient. SUMMARY

[0005] To solve one of the above technical problems, the present application provides a sinkable installed battery system and vehicle.

[0006] The present application adopts the following technical solutions: In a first aspect, the present application provides a sinkable installed battery system, comprising: a mounting plate; a plurality of battery boxes, each of which is arranged on one side of the mounting plate along the thickness direction, and each of which is fixed to the mounting plate, and each of which forms an installation cavity, and each of which is provided with a battery module in the installation cavity; wherein the mounting plate has an extension plate segment extending out of the battery box, and the extension plate segment is provided with a fixing part for connecting and fixing with the frame.

[0007] Optionally, the mounting plate is provided with a wiring hole; the battery box covers the wiring hole; the battery modules on both sides of the mounting plate along the thickness direction are connected through copper bars, and the copper bars penetrate through the wiring hole.

[0008] Optionally, a plurality of weight reduction holes are provided on the mounting plate. The battery box covers each of the weight-reduction holes.

[0009] Optionally, the edge of the protruding plate segment is provided with a clearance notch, which is used to avoid the charging cable of the battery system.

[0010] Optionally, the battery box includes a three-dimensional frame, which includes a distal frame, a proximal frame, and a column; The column is located between the distal frame and the proximal frame, and connects the distal frame and the proximal frame respectively. The proximal frame is welded to the mounting plate, and the distal frame and the mounting plate have a gap; The mounting cavity is formed between the distal frame and the proximal frame.

[0011] Optionally, the battery box includes a side panel; At least some of the side sealing plates are respectively attached to the three-dimensional frame of the two battery boxes located on both sides of the mounting plate along the thickness direction.

[0012] Optionally, the side sealing plate and the mounting plate can be fitted together in any of the following ways: The edge of the mounting plate does not extend beyond the three-dimensional frame of the battery box, and the side sealing plate covers the thickness end face of the side edge of the mounting plate and is respectively attached to the three-dimensional frame on both sides of the mounting plate. The mounting plate has a slit near its edge, and the side sealing plate extends through the slit and is respectively attached to the three-dimensional frame on both sides of the mounting plate.

[0013] Optionally, the mounting plate is provided with through holes; The through-hole connects to the cut; The three-dimensional frame located on both sides of the mounting plate along the thickness direction has a common column; The shared column is installed through the through-hole.

[0014] Optionally, the battery box is provided with at least one layer of battery modules, and the number of battery module layers in the battery box located at the top of the mounting plate is not less than the number of battery module layers in the battery box located at the bottom of the mounting plate.

[0015] Secondly, embodiments of this application provide a vehicle, including: The vehicle frame has a recessed portion; The aforementioned recessable battery system has a mounting plate connected to the vehicle frame via a fixing part, and the battery box on one side of the mounting plate is embedded in the recess.

[0016] By adopting the above technical solution, this application has the following beneficial effects: The battery system of this application has battery boxes on both sides of the mounting plate along the thickness direction, so that the mounting plate is located at the middle or near the middle of the battery system along the height direction. The mounting plate is connected to the vehicle frame, and the battery boxes at the bottom of the mounting plate are embedded in the vehicle frame, realizing a sunken installation of the battery, which significantly reduces the installation height of the battery system and improves the space utilization of the vehicle. The battery system of this application is modularly designed. By equipping battery boxes with different numbers of battery modules, various capacity configurations can be flexibly extended, improving the versatility of the battery system and facilitating the allocation and reuse of battery resources among equipment of different tonnages in the future.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings: Figure 1 This diagram illustrates the structure of a first type of battery system provided in an embodiment of this application. Figure 2 This diagram shows a partial structural schematic of the first battery system provided in an embodiment of this application; Figure 3 An exploded view of a partial structure of the first battery system provided in this application embodiment is shown; Figure 4 This diagram shows a structural schematic of the mounting plate of the first type of battery system provided in an embodiment of this application; Figure 5 An exploded view of the first battery system provided in this application embodiment is shown; Figure 6 This diagram illustrates the structure of a first type of battery system with a hidden active cover provided in an embodiment of this application. Figure 7 This diagram illustrates the structure of a second battery system provided in an embodiment of this application. Figure 8 This diagram illustrates the structure of a second type of battery system with a hidden active cover provided in an embodiment of this application. Figure 9 This invention provides a schematic diagram of the structure of a third battery system according to an embodiment of the present application. Figure 10 This illustration shows a structural schematic diagram of a third type of battery system with a hidden active cover provided in an embodiment of this application; Figure 11 This diagram illustrates the structure of a mounting plate in a battery system according to an embodiment of this application.

[0019] In the diagram: 1. Mounting plate; 11. Extended plate section; 111. Fixing part; 112. Clearance notch; 12. Wiring hole; 13. Weight reduction hole; 14. Cut; 15. Through-post hole; 2. Battery box; 2a. Top battery box; 2b. Bottom battery box; 211. Far end frame; 212. Near end frame; 213. Post; 2131. Shared post; 214. Fixing sealing plate; 2141. Side sealing plate; 214 1a. Common board; 2142. End sealing plate; 215. Movable sealing plate; 2151. Explosion-proof valve; 216. Opening; 217. Enclosure reinforcement; 22. Battery module; 23. Power battery interface; 24. Water cooling pipe; 241. Cooling water interface; 25. Fixing component; 26. Lifting fitting; 27. Sealing ring; 28. Maintenance switch; 29. ​​BBOX antenna; 3. High voltage box; 31. Output interface.

[0020] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0021] To make the objectives, 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 with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Example 1 like Figures 1 to 11As shown, this embodiment of the present disclosure provides a recessable battery system, including: a mounting plate 1 and a plurality of battery boxes 2. Each battery box 2 is disposed on both sides of the mounting plate 1 along its thickness direction, and each battery box 2 is fixed to the mounting plate 1. A mounting cavity is formed within each battery box 2, and a battery module 22 is disposed within the mounting cavity. The mounting plate 1 has an extension section 11 extending out of the battery boxes 2, and a fixing part 111 for connecting and fixing to a vehicle frame is provided on the extension section 11. The fixing part 111 can be a connecting hole provided on the extension section 11, through which fasteners can pass to connect and fix to the vehicle frame.

[0025] The battery system of this application has battery boxes 2 set on both sides of the mounting plate 1 along the thickness direction, so that the mounting plate 1 is located at the middle or near the middle of the battery system along the height direction. The mounting plate 1 is connected to the vehicle frame, and the battery boxes 2 at the bottom of the mounting plate 1 are embedded in the vehicle frame, realizing the sunken installation of the battery, which significantly reduces the installation height of the battery system and improves the space utilization of the vehicle. The battery system of this application is modularly designed. By mounting the mounting plate 1 with battery boxes 2 of different numbers of battery modules 22, various capacity configurations can be flexibly extended, improving the versatility of the battery system and facilitating the allocation and reuse of battery resources among equipment of different tonnages in the future.

[0026] In some possible implementations, the mounting plate 1 has wiring holes 12, the battery box 2 covers the wiring holes 12, and the battery modules 22 located on both sides of the mounting plate 1 in the thickness direction are connected by copper busbars, which are arranged through the wiring holes 12.

[0027] In this implementation scheme, wiring holes 12 are provided on the mounting plate 1 to facilitate electrical connection between the battery modules 22 on both sides of the mounting plate 1. The mounting plate 1 does not obstruct the wiring of the battery modules 22 on both sides. The battery modules 22 inside the two battery boxes 2 located on opposite sides of the mounting plate 1 are electrically connected, which can essentially be understood as a complete circuit battery box 2. That is, the battery modules 22 inside the battery boxes 2 located on opposite sides of the mounting plate 1 are electrically connected through copper busbars, which is essentially equivalent to a complete circuit battery box 2 in the related technology. The copper busbars can pass through the wiring holes 12 on the mounting plate 1, and the setting of the mounting plate 1 does not affect the circuit connection between the battery modules 22.

[0028] In some possible implementations, the mounting plate 1 has multiple weight-reduction holes 13, and the battery box 2 covers each of the weight-reduction holes 13. The weight-reduction holes 13 are located inside the battery box 2 and do not affect the appearance. Furthermore, the arrangement of the weight-reduction holes 13 helps to reduce the weight of the battery system. The arrangement of the weight-reduction holes 13 also connects the internal spaces of the two opposing battery boxes 2, which is beneficial for temperature equalization within the upper and lower battery boxes 2.

[0029] In some possible implementations, such asFigure 11 As shown, the edge of the protruding plate segment 11 is provided with a clearance notch 112, which is used to avoid the charging cable of the battery system. The battery system also has a charging cable, which is used for the charging interface on the high-voltage box 3 of the battery system to charge the battery modules 22 in each battery box 2. The protruding plate segment 11 protrudes from the edge of the battery box 2. If the charging cable comes into contact with the protruding plate segment 11, it is easy to be cut. In this embodiment, by providing a clearance notch 112 on the protruding plate segment 11, the charging cable can easily pass through the clearance notch and avoid being cut. In this embodiment, the mounting plate 1 may also have protruding plate segments 11 on only two sides, and no protruding plate segments 11 on the other two sides. In this case, the side of the mounting plate 1 without protruding plate segments 11 does not protrude from the battery box 2. In this case, the charging cable can be arranged on the side without protruding plate segments 11, so it is not necessary to provide a clearance notch 112 on the protruding plate segment 11.

[0030] In some possible implementations, such as Figure 2 and Figure 3 As shown, the battery box 2 includes a three-dimensional frame, which includes a distal frame 211, a proximal frame 212, and a column 213. The column 213 is located between the distal frame 211 and the proximal frame 212 and connects the distal frame 211 and the proximal frame 212 respectively. The proximal frame 212 is welded to the mounting plate 1. There is a gap between the distal frame 211 and the mounting plate 1, and the mounting cavity is formed between the distal frame 211 and the proximal frame 212. Multiple shelves can be arranged in the mounting cavity, and each shelf is parallel to the mounting plate 1. Each shelf is used to arrange battery modules 22. The battery system can include multiple battery boxes 2 of different heights. The side of each battery box 2 connected to the mounting plate 1 has the same structure, only the height is different. Therefore, battery boxes 2 with a corresponding number of shelves can be assembled according to the different tonnages of the electric engineering machinery. The battery system of this application is modularly designed. By mounting the battery box 2 with different numbers of battery modules 22 on the mounting plate 1, various power configurations can be flexibly extended, which improves the versatility of the battery system and facilitates the allocation and reuse of battery resources among equipment of different tonnages in the future.

[0031] In this embodiment, the proximal frame 212 can be omitted, and the column 213 can be directly welded to the mounting plate 1. To enhance the structural strength of the battery box 2 and facilitate the subsequent installation of the sealing ring 27, a proximal frame 212 can be provided, with the column 213 welded to it, and the proximal frame 212 welded to the mounting plate 1. An opening 216 communicating with the mounting cavity can be formed between the column 213, the distal frame 211, and the proximal frame 212. The annular sealing ring 27 can be respectively attached to the distal frame 211, the proximal frame 212, and the column 213, located around the edge of the opening 216. This ensures a good sealing effect when the movable sealing plate 215 covers the opening 216, allowing the sealing ring 27 and the movable sealing plate 215 to seal together. An explosion-proof valve 2151 can be provided on the movable sealing plate 215.

[0032] The battery box may also include a box reinforcement 217, with crossbeams installed on the frame (far end frame 211, near end frame 212). The box reinforcement is used to connect the crossbeams and the columns, or the box reinforcement is used to connect the perpendicular crossbeams, or the box reinforcement is used to connect the sealing plate and the three-dimensional frame. The box reinforcement 217 plays a role in strengthening the structural strength of the three-dimensional frame.

[0033] In some possible implementations, the battery box 2 includes side panels 2141, wherein at least a portion of the side panels 2141 are respectively attached to the three-dimensional frames of the two battery boxes 2 located on both sides of the mounting plate 1 along the thickness direction.

[0034] In this embodiment, the side sealing plate 2141 is simultaneously connected to the three-dimensional frame on both sides of the mounting plate 1 along the thickness direction. Connecting the three-dimensional frames on both sides to form an integrated structure enhances the structural strength of the battery system.

[0035] The side sealing plate 2141 and the mounting plate 1 can adopt different mating methods: in the first mating method, such as Figure 9 As shown, the edge of the mounting plate 1 does not extend beyond the three-dimensional frame of the battery box 2. This side edge of the mounting plate 1 does not obstruct or interfere with the side sealing plate 2141. The side sealing plate 2141 can directly cover the thickness end face of this side edge of the mounting plate 1 and is respectively attached to the three-dimensional frame on both sides of the mounting plate 1. The side sealing plate 2141 can be welded to the thickness end face of the mounting plate 1 and to the three-dimensional frame, thereby connecting and fixing the three-dimensional frame on both sides of the mounting plate 1 to form an integral structure.

[0036] In some possible implementations, the mounting plate 1 has a slit 14 near its edge, through which the side sealing plate 2141 extends and is respectively attached to the three-dimensional frame on both sides of the mounting plate 1. The mounting plate 1 has a slit 14 on the side with the protruding plate segment 11 located at the edge of the battery box 2. The length of the slit 14 matches the width of the side sealing plate 2141, and the width of the slit 14 matches the thickness of the side sealing plate 2141. The side sealing plate 2141 can be directly inserted through the slit 14 and welded to the mounting plate 1.

[0037] In some possible implementations, the mounting plate 1 has through holes 15 that connect to the cut 14, and the three-dimensional frames located on both sides of the mounting plate 1 along the thickness direction have common columns 2131 that pass through the through holes 15.

[0038] The three-dimensional frame columns 213 located on opposite sides of the mounting plate 1 are shared columns 213, which reduces the number of welding parts, simplifies the process, and helps to strengthen the structural strength of the three-dimensional frame on both sides, thereby enhancing the rigidity and stability of the battery system.

[0039] In some possible implementations, at least one layer of battery modules 22 is provided inside the battery box 2, and the number of layers of battery modules 22 in the battery box 2 located at the top of the mounting plate 1 is not less than the number of layers of battery modules 22 in the battery box 2 located at the bottom of the mounting plate 1.

[0040] This application also provides a vehicle, including: a frame and the aforementioned sinkable battery system. The frame has a recessed portion, and the mounting plate 1 of the battery system is connected to the frame via a fixing part 111. A battery box 2 on one side of the mounting plate 1 is embedded in the recessed portion. The fixing part 111 on the mounting plate 1 can be a connecting hole provided on the protruding plate segment 11, through which fasteners can pass to connect and fix to the vehicle frame. In the battery system, protruding plate segments 11 are provided on at least two opposite sides and are respectively fixed to the frame by fasteners. Both sides of the battery system are stably and reliably mounted on the frame. By fixing symmetrically on both sides, the vibration, impact, and torque experienced by the battery system during driving can be evenly distributed, effectively reducing the risk of deformation or loosening caused by unilateral force, thereby improving the stability and safety of the overall structure and significantly reducing the probability of damage due to local stress concentration.

[0041] The vehicle can be electric construction machinery, such as the electric loader described in this application. The electric loader also includes a housing mounted on the frame and covering the battery system. Because the battery system of this application adopts a recessed installation scheme, the installation height of the battery system is significantly reduced, which facilitates the assembly of the housing and improves the space utilization of the vehicle.

[0042] Example 2 like Figures 1 to 11 As shown in the illustration, this application provides a detailed description of a battery system, which includes: a mounting plate 1, a high-voltage box 3, and multiple battery boxes 2, each of which includes a top battery box 2a and a bottom battery box 2b. There is at least one top battery box 2a and one bottom battery box 2b. The top battery box 2a and the bottom battery box 2b are respectively disposed on both sides of the mounting plate 1 along its thickness direction. Both the top battery box 2a and the bottom battery box 2b are fixed to the mounting plate 1, and the mounting plate 1 extends beyond the top battery box 2a and the bottom battery box 2b. The mounting plate 1 is used to connect and fix to the vehicle frame. The high-voltage box 3 is disposed on the top battery box 2a and is electrically connected to both the top battery box 2a and the bottom battery box 2b. By placing the high-voltage box 3 on the top housing, the connection and assembly of the bottom battery box 2b and the vehicle frame is not affected, and placing the high-voltage box 3 on the top housing facilitates disassembly and maintenance.

[0043] The battery system of this application has battery boxes 2 respectively provided on both sides of the mounting plate 1 along the thickness direction. The mounting plate 1 is connected to the vehicle frame, and each battery box 2 at the bottom of the mounting plate 1 is embedded in the vehicle frame, realizing the sunken installation of the battery, which significantly reduces the installation height of the battery system and improves the space utilization of the vehicle.

[0044] In some possible implementations, the top battery box 2a has a top wall facing away from the mounting plate 1, and the high-voltage box 3 is disposed on the top wall. In this embodiment, placing the high-voltage box 3 on the top wall of the top battery box 2a facilitates the wiring harness arrangement between the high-voltage box 3 and the battery box 2, and also facilitates the wiring harness arrangement between the high-voltage box 3 and the vehicle, improving the efficiency of wiring harness arrangement and installation between the vehicle and the high-voltage box 3. The vehicle includes a front end and a frame, with the front end located at one end of the frame. Wiring harnesses, such as charging / discharging harnesses and signal harnesses, need to be arranged between the high-voltage box 3 and the front end. By placing the high-voltage box 3 above the top battery box 2a, it is convenient to lead wires to the front end.

[0045] In some possible implementations, the extension dimension of the bottom battery box 2b is greater than the extension dimension of the high voltage box 3 along the thickness direction of the mounting plate 1, so that even if the high voltage box 3 is set on top of the top battery box 2a, the overall installation height of the battery system is still effectively reduced compared to the prior art where the high voltage box 3 is set on the side of the battery box 2, assuming convenient wiring.

[0046] In some possible implementations, a power battery interface 23 is provided on the top wall. This interface 23 is electrically connected to the battery modules 22 within the top battery box 2a and the bottom battery box 2b, and is also electrically connected to the high-voltage box 3. Providing the power battery interface 23 on the top wall facilitates wiring to the high-voltage box 3, simplifies the structure, and facilitates the assembly of the battery system.

[0047] In some possible implementations, the mounting plate 1 is provided with fixing parts 111 for connecting and fixing to the vehicle frame on both sides along the first direction, and the high voltage box 3 has a plurality of output interfaces 31, the output interfaces 31 being located on one side of the high voltage box 3 along the second direction, wherein the second direction is perpendicular to the first direction.

[0048] The first direction can be the width of the vehicle, and the second direction can be the length of the vehicle. The second direction is the direction in which the high-voltage box 3 faces the front of the vehicle. By placing the output interface 31 on the side of the high-voltage box 3 facing the front of the vehicle, it is convenient to connect the cables extending from the front of the vehicle to the output interface 31. The output interface 31 can be a power output interface, used to provide the electrical energy required for vehicle driving and operation.

[0049] In some possible implementations, the high-voltage box 3 is located on one side edge of the top wall, or the high-voltage box 3 and the edge of the top wall have a gap.

[0050] The high-voltage box 3 can be installed on the edge of the top wall near the front of the vehicle for easy connection to the front of the vehicle. Alternatively, the high-voltage box 3 can be installed at a certain distance from the edge of the top wall, allowing the cable to be partially supported on the top wall of the top battery box 2a. The end of the cable near the high-voltage box 3 can be fixed to the top wall of the top battery box 2a using a cable tie to prevent the cable from shaking and causing the connector at the end of the cable to detach from the high-voltage box 3.

[0051] In some possible implementations, the battery system includes a water-cooling pipe 24 disposed within the top battery box 2a and the bottom battery box 2b, with a cooling water inlet 241 on the top wall communicating with the water-cooling pipe 24. The battery system of this application does not use a water-cooling unit; instead, it utilizes the vehicle's built-in water-cooling unit. Only the inlet and outlet pipes of the vehicle's water-cooling unit need to be connected to the two cooling water inlets 241 on the top battery box 2a, thereby simplifying the battery system structure and reducing its cost.

[0052] In existing technology, the water-cooling unit and high-voltage box 3 of the battery system are located at the front end of the battery box 2. This arrangement brings several problems. First, the location of the high-voltage box 3 makes the wiring of the vehicle's charging and discharging harnesses complex and extremely inconvenient to install. Furthermore, because the water-cooling unit and high-voltage box 3 are located at the front, if the battery system needs to be opened for maintenance, the entire vehicle's electrical wiring harness, as well as the battery's charging and discharging wiring harness and water pipes, must be disassembled before repairs can be performed, resulting in long after-sales service times and high costs. This application places the high-voltage box 3 at the top, which avoids the front end of the battery box 2 (on the side of the movable sealing plate 215) and improves the convenience of wiring harness arrangement at both the battery and vehicle ends, thus improving installation efficiency.

[0053] In some possible implementations, fasteners 25 are provided on the outer walls of the top battery compartment 2a and / or the bottom battery compartment 2b. These fasteners 25 are used to connect and secure electrical devices on the vehicle. The electrical devices may be the condenser of the vehicle's air conditioning system, as well as numerous cables or other structures, thus making full use of space. The fasteners 25 may be metal or plastic blocks, fixed to the outer wall of the battery compartment 2. Fastening holes, such as threaded holes, may be provided on the fasteners 25.

[0054] In some possible implementations, the battery system includes multiple lifting attachments 26 disposed on the top battery box 2a. The lifting attachments 26 may be lifting rings, used to connect to lifting equipment during battery system assembly and disassembly, facilitating the lifting and transfer of the battery system by personnel using the lifting equipment.

[0055] In some possible implementations, the mounting plate 1 has four sides, with adjacent sides perpendicular to each other, and adjacent sides are connected by a transition bevel or transition arc. This avoids the formation of sharp corners between adjacent sides, improving product safety.

[0056] This application also provides a vehicle, including a frame and the aforementioned battery system, wherein the frame has a recessed portion. A mounting plate 1 for the battery system is fixedly connected to the frame, and the bottom battery box 2b is embedded in the recessed portion. This achieves a recessed battery mounting, significantly reducing the installation height of the battery system and improving the vehicle's space utilization.

[0057] Example 3 like Figures 1 to 11As shown in the illustration, this application provides a detailed description of a battery system, which includes: a mounting plate 1 and a plurality of battery boxes 2. The mounting plate 1 is used to fix it to the vehicle frame. Each of the battery boxes 2 is disposed on both sides of the mounting plate 1 along its thickness direction. Each of the battery boxes 2 includes a three-dimensional frame, a fixed sealing plate 214, a movable sealing plate 215, and a battery module 22. The three-dimensional frame is welded and fixed to the mounting plate 1. The fixed sealing plate 214 is connected to the three-dimensional frame. The fixed sealing plate 214 encloses and forms a mounting cavity and an opening 216 communicating with the mounting cavity. The battery module 22 is disposed in the mounting cavity. The movable sealing plate 215 is detachably connected to the three-dimensional frame. The movable sealing plate 215 is used to close or open the opening 216. A sealing ring 27 is provided between the movable sealing plate 215 and the three-dimensional frame.

[0058] The battery system of this application has battery boxes 2 on both sides of the mounting plate 1 along the thickness direction. Each battery box 2 at the bottom of the mounting plate 1 is embedded in the vehicle frame, realizing a sunken installation of the battery, which significantly reduces the installation height of the battery system and improves the space utilization of the vehicle. The sealing of the battery system of this application is divided into two parts by the mounting plate 1. The movable sealing plates 215 on both sides are not restricted by the mounting plate 1, and the movable sealing plates 215 on both sides effectively seal the openings 216 on both sides of the mounting plate 1, thereby improving the safety and reliability of the product.

[0059] In some possible implementations, the fixed sealing plate 214 is welded to the three-dimensional frame and the mounting plate 1, and the sealing ring 27 is disposed around the edge of the opening 216 on the three-dimensional frame. The peripheral edge of the movable sealing plate 215 is connected to the three-dimensional frame by fasteners, and the sealing ring 27 is compressed and disposed between the movable sealing plate 215 and the three-dimensional frame.

[0060] In this embodiment, the fastener can be a screw, with one end of the screw passing through the movable sealing plate 215 and the sealing ring 27 in sequence and connected to the three-dimensional frame. The sealing ring 27 is a closed ring, compressed and positioned between the movable sealing plate 215 and the three-dimensional frame.

[0061] In some possible implementations, the three-dimensional frame includes a distal frame 211, a proximal frame 212, and a column 213. The column 213 is located between the distal frame 211 and the proximal frame 212 and connects the distal frame 211 and the proximal frame 212 respectively. The proximal frame 212 is welded to the mounting plate 1. There is a gap between the distal frame 211 and the mounting plate 1. Sealing surfaces are provided on one side of the distal frame 211, the proximal frame 212, and the column 213 located at the opening 216. The sealing ring 27 covers each of the sealing surfaces. The sealing surfaces are flat surfaces to facilitate the smooth fit of the sealing ring 27 onto the sealing surface.

[0062] In this embodiment, to facilitate subsequent installation of the sealing ring 27, a proximal frame 212 is provided, with the column 213 welded to the proximal frame 212, which in turn is welded to the mounting plate 1. An opening 216 communicating with the mounting cavity can be formed between the column 213, the distal frame 211, and the proximal frame 212. The annular sealing ring 27 can be respectively attached to the distal frame 211, the proximal frame 212, and the column 213, located around the edge of the opening 216. This ensures a good sealing effect when the movable sealing plate 215 covers the opening 216, allowing the sealing ring 27 and the movable sealing plate 215 to seal together.

[0063] In some possible implementations, the well-sealed battery system includes a high-voltage box 3, and a fixing plate 214 including a side sealing plate 2141 and an end sealing plate 2142. The side sealing plate 2141 is vertically connected to the mounting plate 1, and the end sealing plate 2142 is parallel to the mounting plate 1. The end sealing plate 2142 is disposed on the side of the three-dimensional frame away from the mounting plate 1, that is, the end sealing plate 2142 covers the distal frame 211, and the high-voltage box 3 is disposed on the end sealing plate 2142.

[0064] It should be noted that the battery box 2 located on one side of the mounting plate 1 is the top battery box 2a, and the battery box 2 located on the other side of the mounting plate 1 is the bottom battery box 2b. When the battery system is installed on the vehicle frame, the bottom battery box 2b is embedded in the frame, while the top battery box 2a is located on top of the frame. The high-voltage box 3 of this application is disposed on the end cover plate 2142 of the top battery box 2a.

[0065] In some possible implementations, such as Figure 1 As shown, the end cover plate 2142 is equipped with a cooling water interface 241, a power battery interface 23, and a maintenance switch 28. The power battery interface 23 is connected to the input interface of the high-voltage box 3 via a cable. By placing the cooling water interface 241, power battery interface 23, and maintenance switch 28 on the end cover plate 2142 and on the same side as the high-voltage box 3, unified pipeline connection is facilitated. This also facilitates wiring between the power battery interface 23 and the high-voltage box 3, and also facilitates connecting the vehicle's water-cooled unit to the cooling water interface 241. The maintenance switch 28 is a manual maintenance switch (MSD), mainly used for high-voltage electrical safety isolation, circuit protection, and standardized operation to ensure the safety of personnel and vehicles during maintenance. By placing the maintenance switch 28 on the end cover plate 2142, it facilitates plugging and unplugging operations by the operator.

[0066] In some possible implementations, such as Figure 7As shown, the well-sealed battery system includes a BBOX antenna 29, which is mounted on the side cover plate 2141 of the fixed cover plate 214. By mounting the BBOX antenna 29 on the side cover plate 2141, the end cover plate 2142 is avoided, thus preventing interference with the pipelines on the end cover plate 2142. In some possible embodiments, the BBOX antenna 29 may also be mounted on the end cover plate 2142.

[0067] In some possible implementations, such as Figure 9 As shown, the well-sealed battery system includes a common plate 2141a, which is perpendicular to the mounting plate 1. The common plate 2141a extends to two three-dimensional frames located on both sides of the mounting plate 1. Part of the common plate 2141a serves as a fixing plate 214 for the battery box 2 on one side of the mounting plate 1, and part of the common plate 2141a serves as a fixing plate 214 for the battery box 2 on the other side of the mounting plate 1. For example, it can be a side sealing plate 2141 of the fixing plate 214. Specifically, as... Figure 4 As shown, the mounting plate 1 has a slit 14 near its edge. A portion of the side sealing plate 2141 of the battery box 2 passes through the slit 14 and is respectively attached to the three-dimensional frame on both sides of the mounting plate 1. The mounting plate 1 has a slit 14 on the side with the protruding plate segment 11 located at the edge of the battery box 2. The length of the slit 14 matches the width of the common plate 2141a, and the width of the slit 14 matches the thickness of the common plate 2141a. The common plate 2141a can directly pass through the slit 14 and is welded and fixed to the mounting plate 1.

[0068] In some possible implementations, wiring holes 12 are provided on the mounting plate 1, which connect to the mounting cavities of the battery boxes 2 located on both sides of the mounting plate 1 along its thickness direction. Each battery module 22 located in the battery boxes 2 on both sides of the mounting plate 1 is connected by a conductor, and part of the conductor passes through the wiring holes 12. The conductor can be a copper busbar.

[0069] In this implementation scheme, wiring holes 12 are provided on the mounting plate 1 to facilitate electrical connection between the battery modules 22 on both sides of the mounting plate 1. The mounting plate 1 does not obstruct the wiring of the battery modules 22 on both sides. The battery modules 22 inside the two battery boxes 2 located on opposite sides of the mounting plate 1 are electrically connected, which can essentially be understood as one battery box 2. That is, the battery modules 22 inside the battery boxes 2 located on opposite sides of the mounting plate 1 are electrically connected through copper busbars, which is essentially equivalent to a complete battery box 2 circuit. The copper busbars can pass through the wiring holes 12 on the mounting plate 1, and the setting of the mounting plate 1 does not affect the circuit connection between the battery modules 22.

[0070] In one possible implementation, at least two battery boxes 2 are provided on both sides of the mounting plate 1 along the thickness direction. The number of battery boxes 2 on both sides of the mounting plate 1 is equal, and each battery box 2 on one side of the mounting plate 1 faces the other. The battery modules 22 in the two battery boxes 2 facing each other on both sides of the mounting plate 1 are electrically connected. That is, the two battery boxes 2 facing each other on both sides of the mounting plate 1 constitute a battery box 2 with a complete circuit.

[0071] In some possible implementations, such as Figure 2 and Figure 3 As shown, in each battery box 2 on the same side of the mounting plate 1, the three-dimensional frames of two adjacent battery boxes 2 are separated by a side sealing plate 2141. The side sealing plate 2141 is welded to the three-dimensional frames of the two battery boxes 2 on both sides along the thickness direction. Two adjacent battery boxes 2 can share the same side sealing plate 2141, which helps to simplify the structure and reduce the weight of the battery system.

[0072] The battery system of this application is modularly designed. By equipping the battery box 2 with different numbers of battery modules 22, various power configurations can be flexibly extended, which improves the versatility of the battery system and facilitates the allocation and reuse of battery resources among equipment of different tonnages.

[0073] The distal frame 211 of the three-dimensional frame and the mounting plate 1 have a gap, and the mounting cavity is formed between the distal frame 211 and the proximal frame 212. Multiple shelves can be arranged within the mounting cavity, each shelf being parallel to the mounting plate 1, and each shelf is used to mount a battery module 22. The battery system can include multiple battery boxes 2 of different heights. Each battery box 2 has the same structure on the side connected to the mounting plate 1, differing only in height, thus allowing for the assembly of battery boxes 2 with a corresponding number of shelves according to the tonnage of the electric engineering machinery.

[0074] For example, such as Figure 8 As shown in the illustration, an embodiment of this application provides a battery system in which two shelves are provided in the top battery box 2a, allowing for three layers of battery modules 22 to be installed, while only one layer of battery modules 22 is installed in the bottom battery box 2b. This application also provides a second battery system based on the tonnage of the electric construction machinery, such as... Figure 10 As shown, based on the aforementioned battery system, an additional battery module 22 is added inside the bottom battery box 2b, while the structure inside the top battery box 2a remains largely unchanged, increasing the capacity by 64kWh and improving the energy density of the battery system. Figure 6 As shown, this application embodiment also provides a third battery system. Due to space constraints and the need for high power capacity, two battery boxes 2 can be respectively arranged on both sides of the mounting plate 1 along the thickness direction, for a total of four battery boxes 2. Each battery box 2 is arranged in pairs, thereby significantly increasing the power capacity compared to... Figure 8The battery system shown increases capacity by 136 kWh.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A sinkable battery system, characterized in that, include: Mounting plate; A plurality of battery boxes are provided, each battery box being disposed on both sides of the mounting plate along the thickness direction, each battery box being fixed to the mounting plate, and a mounting cavity being formed inside the battery box, wherein a battery module is disposed in the mounting cavity; The mounting plate has an extension section that extends out of the battery box, and the extension section is provided with a fixing part for connecting and fixing to the vehicle frame.

2. The sinkable battery system according to claim 1, characterized in that, The mounting plate is provided with wiring holes; The battery box covers the wiring hole; The battery modules located on both sides of the mounting plate in the thickness direction are connected by copper busbars, which are arranged through the wiring holes.

3. The sinkable battery system according to claim 1, characterized in that, The mounting plate is provided with multiple weight-reduction holes; The battery box covers each of the weight-reduction holes.

4. The sinkable battery system according to claim 1, characterized in that, The edge of the protruding plate section is provided with a clearance notch, which is used to avoid the charging cable of the battery system.

5. The sinkable battery system according to claim 1, characterized in that, The battery box includes a three-dimensional frame, which includes a distal frame, a proximal frame, and a column. The column is located between the distal frame and the proximal frame, and connects the distal frame and the proximal frame respectively. The proximal frame is welded to the mounting plate, and the distal frame and the mounting plate have a gap; The mounting cavity is formed between the distal frame and the proximal frame.

6. The sinkable battery system according to claim 5, characterized in that, The battery box includes a side panel; At least some of the side sealing plates are respectively attached to the three-dimensional frame of the two battery boxes located on both sides of the mounting plate along the thickness direction.

7. The sinkable battery system according to claim 6, characterized in that, The side sealing plate and the mounting plate can be fitted in any of the following ways: The edge of the mounting plate does not extend beyond the three-dimensional frame of the battery box, and the side sealing plate covers the thickness end face of the side edge of the mounting plate and is respectively attached to the three-dimensional frame on both sides of the mounting plate. The mounting plate has a slit near its edge, and the side sealing plate extends through the slit and is respectively attached to the three-dimensional frame on both sides of the mounting plate.

8. The sinkable battery system according to claim 7, characterized in that, The mounting plate is provided with through-pillar holes; The through-hole connects to the cut; The three-dimensional frame located on both sides of the mounting plate along the thickness direction has a common column; The shared column is installed through the through-hole.

9. The sinkable battery system according to any one of claims 1-8, characterized in that, The battery box is provided with at least one layer of battery modules, and the number of battery module layers in the battery box located at the top of the mounting plate is not less than the number of battery module layers in the battery box located at the bottom of the mounting plate.

10. A vehicle, characterized in that, include: The vehicle frame has a recessed portion; The sinkable battery system as described in any one of claims 1-9, wherein the mounting plate of the battery system is connected to the vehicle frame via a fixing part, and the battery box on one side of the mounting plate is embedded in the recess.

Images