Battery water cooling device

Abstract

The utility model discloses a battery water cooling device, apply to battery water cooling technical field, arrange in the rear of vehicle cab, and with the battery pack fixed in the outer wall of frame along the whole car length direction in turn, battery water cooling device includes mounting bracket and battery water cooling unit, and mounting bracket is equipped with installation site and connecting portion, and connecting portion is attached and is fixed to the outer wall of frame, and the opening of installation site is opposite with connecting portion, and opens to the outer side of frame, and battery water cooling unit is by the side opening and is loaded into installation site, and battery water cooling unit includes unit body and expansion water tank, and the water inlet of expansion water tank is communicated with unit body waterway, and unit body includes outer mounting plate and inner mounting plate, and outer mounting plate is set up back to connecting portion, and its surface arranges a plurality of unit fans in vertical superposed mode, and inner mounting plate is adjacent connecting portion, and its board face concentrates and arranges a plurality of connection ports for the inlet and outlet of cooling medium. Adopt vertical arrangement, effectively solved the problem such as battery water cooling unit occupies larger cargo box space.

Description

Technical Field

[0001] This utility model relates to the field of vehicle battery water cooling technology, and in particular to a battery water cooling device. Background Technology

[0002] Existing battery-swapping pure electric heavy-duty trucks feature an integrated battery water-cooling unit and battery frame, with the battery water-cooling unit arranged horizontally. The battery frame has pre-drilled mounting positions and positioning holes, and the entire battery water-cooling unit is directly bolted and fixed to the battery frame. The unit's fans are positioned laterally along the width of the vehicle, with the air outlets blowing towards the rear of the truck.

[0003] The battery water-cooled unit layout of existing rechargeable pure electric heavy trucks can be roughly divided into two categories:

[0004] One type continues the horizontal design of battery swapping systems, embedding the battery water-cooling unit entirely into the rear battery frame. This method is limited by rear space and is only suitable for small-volume cargo box vehicles.

[0005] Another type eliminates the battery frame and instead places the battery on the side, with the horizontal battery water-cooled unit arranged independently: either behind the cab or inside the frame. For tractor units or long-wheelbase trucks, while placing the battery water-cooled unit directly behind the cab or inside the frame can free up cargo space, it makes maintenance of the battery water-cooled unit inside the frame difficult, and long-term immersion in water and high-dust conditions will significantly weaken the unit's performance. If the battery capacity increases and the demand for cooling and heating power increases, the size of the horizontal battery water-cooled unit will expand accordingly, and the wheelbase and side frame space will be insufficient to accommodate it, making the layout contradictions even more prominent.

[0006] Traditional pure electric heavy-duty trucks use battery frames as the carrier for battery swapping or charging, with battery water-cooling units stacked on top of or below the frame. However, for large-volume dump trucks, the battery frame directly encroaches on the cargo box volume; extending the wheelbase to avoid this would compromise the vehicle's maneuverability. Therefore, moving the battery and battery water-cooling units to the sides of the chassis becomes the optimal solution for freeing up cargo box space.

[0007] In conclusion, how to effectively solve the problem of battery water-cooling units occupying a large cargo box space is an urgent issue that needs to be addressed by those skilled in the art. Utility Model Content

[0008] The purpose of this utility model is to provide a battery water cooling device, which is arranged vertically and installed on the outside of the vehicle frame, effectively solving the problem that the battery water cooling unit occupies a large cargo box space.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0010] A battery water-cooling device is arranged behind the driver's cab of a vehicle and sequentially arranged along the length of the vehicle along with a battery pack fixed to the outer wall of the vehicle frame. The battery water-cooling device includes a mounting bracket and a battery water-cooling unit. The mounting bracket has a mounting position and a connecting part. The connecting part is attached to and fixed to the outer wall of the vehicle frame. The opening of the mounting position is opposite to the connecting part and opens to the outside of the vehicle frame. The battery water-cooling unit is installed into the mounting position through a side opening. The battery water-cooling unit includes a unit body and an expansion tank. The water inlet of the expansion tank is connected to the water passage of the unit body. The unit body includes an outer mounting plate and an inner mounting plate. The outer mounting plate is arranged back to back of the connecting part, and multiple unit fans are arranged vertically on its surface. The inner mounting plate is adjacent to the connecting part, and multiple connection ports for the inlet and outlet of cooling medium are centrally arranged on its surface.

[0011] Optionally, the front mounting plate, rear mounting plate, and inner mounting plate of the battery water-cooled unit are all provided with air inlets to form a multi-directional air intake channel.

[0012] Optionally, a preset gap is maintained between the rear panel of the vehicle cab and the front mounting plate, and the upper end of the rear panel is connected to the front upright plate of the mounting bracket by a connecting rod to form a multi-point connection.

[0013] Optionally, the mounting frame includes a back plate, an upper support plate, and a lower support plate, with both support surfaces extending vertically cantilevered from the back plate; the expansion tank is mounted on the upper support plate, the unit body is situated on the lower support plate, and a bracket for supporting the charger is fixedly connected to the bottom side of the lower support plate.

[0014] Optionally, the area of ​​the upper support plate is smaller than that of the lower support plate, the lower support plate is located at one-third of the height of the back plate, and its lower surface is reinforced with the back plate by a diagonal beam to form a triangular support structure.

[0015] Optionally, at least two slide rails perpendicular to the back plate are fixed on the upper surface of the lower support plate; a slider is correspondingly provided on the bottom surface of the unit body, the slider slides in cooperation with the slide rails, and the unit body slides along the slide rails to slide to a preset installation position.

[0016] Optionally, the connecting part is a connecting plate fixed on the mounting frame, and its plate surface is provided with connecting holes. After being aligned with the mounting holes on the outer wall of the frame, it is locked by connecting parts. The bottom surface of the unit body is higher than the bottom surface of the frame, forming a lifting installation.

[0017] Optionally, the connecting holes are multiple sets of circular holes arranged in a vertical array on the connecting plate. By selecting and locking the holes, the installation height of the battery water-cooling unit can be adjusted in a stepwise manner.

[0018] Optionally, the connecting hole is an elongated hole opened vertically in the connecting plate, and the connector can slide up and down and lock in the elongated hole to realize continuous fine adjustment of the height of the battery water cooling unit.

[0019] Optionally, a pad of various thicknesses is also provided. The pad can be embedded in the elongated hole. The connector passes through the elongated hole and presses against the pad. The bottom surface of the pad presses against the bottom surface of the elongated hole.

[0020] The beneficial effect of this utility model is that the battery water-cooling device provided by this utility model is arranged as a whole behind the cab and on the outside of the frame, suspended on the same side as the battery pack, without encroaching on the upper space of the frame. The frame is a beam structure that spans the front and rear axles, consisting of two longitudinal beams and several cross beams, and is supported by the wheels via suspension, front axle, and rear axle. The layout of the battery water-cooling device vertically attached to the longitudinal beams not only frees up the frame platform but also shortens the longitudinal dimension, saving valuable wheelbase for the cargo box, making it tailor-made for pure electric heavy trucks.

[0021] The battery water cooling system includes a mounting bracket and a battery water cooling unit. The mounting bracket has a single-sided opening, which is perpendicular to the outside of the vehicle frame and opens outward, forming a drawer-type insertion channel that allows the battery water cooling unit to be installed as a whole from the side.

[0022] The battery water-cooled unit, comprising the unit body and expansion tank, is an integrated solution for the battery pack thermal management system. The unit body includes an external mounting plate and an internal mounting plate. Multiple unit fans are vertically stacked on the external mounting plate, forming a wall-like heat dissipation channel. The air outlets are side-mounted, utilizing the chimney effect to control the battery pack temperature difference within the target range even in high-temperature environments. The unit fans have been changed from a traditional horizontal arrangement to a vertical layout, ensuring the overall width of the unit does not exceed the battery pack, and the overall vehicle outline remains unchanged. The internal mounting plate, adjacent to the connection points, centrally houses all cooling media and electrical interfaces, including inlet / outlet quick-connect fittings, electric heater interfaces, temperature / pressure sensor ports, high-voltage wire connectors, low-voltage wiring harness through holes, refrigerant charging ports, and grounding. This allows for seamless connection on a single plane, facilitating on-site connection of water pipes and wiring harnesses.

[0023] The vertical battery water-cooling device of this utility model is suspended and fixed to the outer wall of the longitudinal beam of the vehicle frame, occupying only the vertical space on the outer side of the vehicle frame without encroaching on the surface of the vehicle frame. The longitudinal length of the entire vehicle is shortened, freeing up valuable wheelbase for the cargo box. The unit adopts a drawer-type side disassembly and assembly, and is suspended on the outer side of the vehicle frame. Maintenance personnel can quickly pull it out for maintenance without entering the vehicle frame, greatly reducing downtime. This arrangement saves front and rear space in the driving direction, making the overall vehicle layout more flexible and compatible with more cargo box types, with good versatility. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the battery water cooling device provided in a specific embodiment of the present invention.

[0026] Figure 2 for Figure 1 Schematic diagram of the mounting bracket;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the generator unit;

[0028] Figure 4 for Figure 3 Another view;

[0029] Figure 5 for Figure 1 Schematic diagram of the expansion tank structure;

[0030] Figure 6 This is a structural schematic diagram of the external mounting plate;

[0031] Figure 7 This is a structural schematic diagram of the internal mounting plate;

[0032] Figure 8 This is a schematic diagram showing the connection between the battery water-cooling unit and the vehicle frame.

[0033] Figure 9 This is a schematic diagram of the battery water cooling device installed in the vehicle.

[0034] Figure label:

[0035] 1-Mounting bracket; 2-Unit body; 3-Expansion tank; 4-Frame; 5-Battery pack; 6-Cab; 11-Upper support plate; 12-Back plate; 13-Connecting plate; 14-Slanted beam; 15-Bracket; 16-Lower support plate; 21-Outer mounting plate; 22-Front mounting plate; 23-Inner mounting plate; 24-Rear mounting plate; 25-Air inlet; 26-Unit fan; 27-Water inlet; 28-Water outlet. Detailed Implementation

[0036] The core of this utility model is to provide a battery water cooling device, which is arranged vertically and installed on the outside of the vehicle frame, effectively solving the problem that the battery water cooling unit occupies a large cargo box space.

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please refer to Figures 1 to 7 , Figure 1 This is a schematic diagram of the battery water cooling device provided in a specific embodiment of the present invention. Figure 2 for Figure 1 Schematic diagram of the mounting bracket; Figure 3 for Figure 1 Schematic diagram of the structure of the generator unit; Figure 4 for Figure 3 Another view; Figure 5 for Figure 1 Schematic diagram of the expansion tank structure; Figure 6 This is a structural schematic diagram of the external mounting plate; Figure 7 This is a schematic diagram of the internal mounting plate.

[0039] In one specific embodiment, the battery water-cooling device provided by this utility model is arranged behind the vehicle cab 6 and is arranged sequentially along the length of the vehicle with the battery pack 5 fixed to the outer wall of the frame 4. The battery water-cooling device includes a mounting frame 1 and a battery water-cooling unit. The mounting frame 1 is provided with a mounting position and a connecting part. The connecting part is attached to and fixed to the outer wall of the frame 4. The opening of the mounting position is opposite to the connecting part and is open to the outside of the frame 4. The battery water-cooling unit is installed into the mounting position through the side opening. The battery water-cooling unit includes a unit body 2 and an expansion tank 3. The water inlet of the expansion tank 3 is connected to the water passage of the unit body 2. The unit body 2 includes an outer mounting plate 21 and an inner mounting plate 23. The outer mounting plate 21 is arranged back to back with the connecting part, and multiple unit fans 26 are arranged vertically on its surface. The inner mounting plate 23 is adjacent to the connecting part, and multiple connection ports for the cooling medium to enter and exit are centrally arranged on its surface.

[0040] In the above structure, the battery water-cooling unit is located behind the cab 6 and on the outside of the frame 4, suspended on the same side as the battery pack 5, without encroaching on the upper space of the frame 4. The frame 4 is a beam structure that connects the front and rear axles, consisting of two longitudinal beams and several crossbeams, supported by the suspension, front axle, and rear axle to the wheels. The vertical placement of the battery water-cooling unit against the longitudinal beams frees up the platform of the frame 4 and shortens the longitudinal dimension, freeing up valuable wheelbase for the cargo box, making it a perfect fit for pure electric heavy trucks.

[0041] The battery water-cooling system includes a mounting bracket 1 and a battery water-cooling unit. The mounting bracket 1 has a U-shaped or C-shaped frame with a single-sided opening. The opening is perpendicular to the outside of the frame 4 and faces outwards, forming a drawer-type insertion channel, allowing the battery water-cooling unit to be installed as a whole from the side. The connection part of the mounting bracket 1 adopts a standardized design, compatible with units of different power ratings, enabling serialized configurations on the same frame 4. The connection part can be a full-circle flange or bent lugs, which are directly fixed to the outer wall of the frame 4 using bolts / rivets after being fitted, serving both as a load-bearing and vibration-sealing interface.

[0042] The battery water-cooled unit, comprising the unit body 2 and the expansion tank 3, is an integrated solution for the thermal management system of the battery pack 5. When the battery pack 5 needs to be cooled, it is cooled by a heat exchanger; when it needs to be heated, it is heated by a heater or a temperature control element.

[0043] The unit body 2 houses the water pump, electric compressor, water pipes, high and low pressure lines, pre-charge device, PTC, fuse box, condenser, air conditioning pipes, heat exchanger, sensors, etc., with a structure consistent with common solutions on the market, which will not be described in detail here. The expansion tank 3 is located at the highest point of the system, usually on the top or side of the unit body 2, to accommodate the volume changes caused by thermal expansion and contraction of the coolant, and to replenish and stabilize the pressure in real time; its compensation port is connected to the return water main on the side of the water pump suction port to ensure that the water pump is always in a positive pressure state to prevent cavitation. The tank has a transparent window and a low liquid level audible and visual alarm, making the water level status clear at a glance; its inlet is directly connected to the main circulation loop through a quick-connect coupling to achieve rapid liquid replenishment and efficient venting, making maintenance simpler.

[0044] The generator set body 2 is a vertical rectangular metal casing, including an outer mounting plate 21 and an inner mounting plate 23. Multiple generator set fans 26 are vertically stacked on the outer mounting plate 21, forming a wall-like heat dissipation channel. The air outlets are side-mounted, utilizing the chimney effect to control the temperature difference of the battery pack 5 within the target range even in high-temperature environments. The generator set fans 26 have been changed from a traditional horizontal arrangement to a vertical arrangement, ensuring the overall width of the unit does not exceed that of the battery pack 5, and maintaining the same overall vehicle profile.

[0045] The inner mounting plate 23 is adjacent to the connection part, where all cooling media and electrical interfaces are centrally arranged, including the water inlet 27, water outlet 28, electric heater interface, temperature sensor port, pressure sensor port, high voltage wire plug, low voltage wire harness through hole, refrigerant charging port and grounding, so that the connection can be completed on a single plane, making it more convenient to connect water pipes and wire harnesses on site.

[0046] Vehicle installation process: The vertical battery water-cooling unit and expansion tank 3 are first fixed to the mounting bracket 1 with bolts to form a pre-assembled assembly; the pre-assembled assembly is then fixed to the outside of the longitudinal beam of the frame 4 with bolts, and tightened in one go. Connection diagram as follows: Figure 8 As shown, the final form is as follows Figure 9 As shown.

[0047] The vertical battery water-cooling device of this utility model is suspended and fixed on the outer wall of the longitudinal beam of the frame 4, occupying only the vertical space on the outer side of the frame 4 and not encroaching on the surface of the frame 4. The longitudinal length of the whole vehicle is shortened, freeing up valuable wheelbase for the cargo box. The unit body 2 adopts a drawer-type side disassembly and assembly, and is suspended on the outer side of the frame 4. Maintenance personnel can quickly pull it out for maintenance without entering the interior of the frame 4, greatly reducing downtime. This arrangement saves front and rear space in the driving direction, making the overall vehicle layout more flexible and compatible with more cargo box types, with good versatility.

[0048] Based on the above specific embodiments, the front mounting plate 22, rear mounting plate 24 and inner mounting plate 23 of the battery water cooling unit are all provided with air inlets 25 to form a multi-directional air intake channel.

[0049] In practical applications, in a side-mounted-vertical layout, the battery water-cooled unit uses three mounting plates—front, rear, and inner—to create a 270° surround multi-directional air intake system. The three plates are perforated along their thickness direction with honeycomb or louvered air inlets 25, forming a three-dimensional, low-resistance, all-around air intake channel, eliminating the dead airflow angles of traditional single-sided air intake.

[0050] The front mounting plate 22 is the windward side, located on the outermost side of the generator body 2, facing the front of the vehicle and in the same direction as the driving direction. When driving, the oncoming dynamic pressure is directly utilized to reduce the power consumption of the generator body 2 fan; when parked, the generator fan 26 draws in air to form an active air intake channel.

[0051] The rear mounting plate 24 is on the leeward side, facing the rear of the vehicle, and is located on the leeward side of the unit body 2. By utilizing the negative pressure area at the rear of the vehicle and the reverse airflow when reversing, cooling air is continuously introduced, making up for the lack of air intake on the leeward side in traditional systems.

[0052] The inner mounting plate 23 is close to the mating surface of the frame 4, tightly attached to the longitudinal beam, and directly opposite the suction side of the unit fan 26. It utilizes the negative pressure zone of the cargo box side seam to draw in ambient air, and can still provide supplemental air at low speeds or when reversing to prevent airflow short circuit.

[0053] The three mounting plates intertwine in three-dimensional space to form a 270° encircling air intake corridor. The moment the unit's fan starts, the three airflow paths—positive pressure at the front of the vehicle, return flow at the rear, and negative pressure at the four side seams of the frame—converge immediately, eliminating local eddies. Static pressure is significantly improved, and airflow increases dramatically at the same power consumption, achieving a leapfrog advancement in heat dissipation efficiency.

[0054] Preferably, the air inlet 25 is a honeycomb array of punched holes on a whole plate, with the holes turned outward to guide the airflow, forming a passive wind-facing pressurization section in the fanless area.

[0055] Preferably, a dustproof net or louvers are added to the back side of the air inlet 25. The angle of the louvers is designed to both block water and guide air, preventing water from entering during high-pressure washing.

[0056] Preferably, the edge of the air inlet 25 is flanged or coated with rubber to prevent cutting of the wire harness and improve the rigidity of the panel.

[0057] Through a three-dimensional air duct that runs through three sides, the unit body 2 achieves a high-efficiency, low-noise, and stable multi-directional air intake system under all operating conditions within a vertically placed, side-mounted, extreme space, providing a reliable guarantee for the thermal management of the entire vehicle.

[0058] Based on the above specific embodiments, a preset gap is maintained between the rear panel of the vehicle cab 6 and the front mounting plate 22, and the upper end of the rear panel is connected to the front upright plate of the mounting bracket 1 by a connecting rod.

[0059] In some embodiments, the lateral dimension of the rear panel of the cab 6 is wider than that of the frame 4. The side of the battery water-cooled unit closest to the frame 4 overlaps with the rear panel of the cab 6. To ensure convenient installation of the mounting bracket 1, a controllable gap is maintained between the rear panel of the vehicle cab 6 and the front mounting plate 22 of the mounting bracket 1. The gap is typically set to 30-50mm. This gap forms a stable high-speed airflow channel on the windward side, ensuring that the oncoming airflow can smoothly enter the air inlet 25 of the front mounting plate 22. At the same time, it takes into account the suspension jump of the cab 6, the deflection of the wiring harness, and the dynamic safety margin required for daily disassembly and assembly, avoiding rigid collisions under any operating conditions.

[0060] To further enhance rigidity and suppress cantilever vibration of the battery water-cooling device, one or two connecting rods are added between the upper edge of the rear plate and the top of the front upright plate of the mounting bracket 1, forming a multi-point spatial truss that connects the rear plate of the cab 6, the mounting bracket 1, and the frame 4 into a single unit, enhancing the connection strength of the mounting bracket 1. The connecting rods can be made of lightweight round tubes, hinged at both ends with rubber bushings. The bushings allow angular displacement and can absorb the torsion of the frame 4 and the pitch of the cab 6, preventing fatigue cracking of the connection holes. One end of the connecting rod is hinged to the crossbeam of the rear plate of the cab 6, and the other end is hinged to the top of the front upright plate. The lower hinge can use a quick-release pin design; pulling out the pin disconnects the connection between the battery water-cooling device and the cab 6, allowing for complete disassembly of the battery water-cooling device and significantly reducing maintenance downtime. Optionally, the connecting rods can be telescopic, adaptively adjusting to changes in the height of the mounting bracket 1, balancing versatility and ease of assembly.

[0061] Based on the above specific embodiments, the mounting frame 1 includes a back plate 12, an upper support plate 11 and a lower support plate 16, with both support surfaces extending vertically from the back plate 12 in a cantilever manner; the expansion tank 3 is installed on the upper support plate 11, the unit body 2 is located on the lower support plate 16, and a bracket 15 for supporting the charger is fixedly connected to the bottom side of the lower support plate 16.

[0062] In some embodiments, the mounting bracket 1 is connected by a back plate 12 and double cantilever to form a longitudinal three-layer platform, which sequentially supports the expansion tank 3, the unit body 2 and the vehicle charger.

[0063] The back plate 12 is a single rectangular steel plate or welded frame with transversely stamped reinforcing ribs on its surface. A buffer pad is attached to one side of the frame 4 to improve bending stiffness and achieve integrated sealing and vibration reduction. The back plate 12 is rigidly connected to the outer wall of the frame 4 by high-strength bolts, forming the mechanical anchor point of the entire device.

[0064] The upper support plate 11 extends vertically cantilevered from the top of the back plate 12. It has a small area and is used solely to support the expansion tank 3. Positioning pins are installed on the plate surface for precise engagement with the bottom shell of the expansion tank 3. Preferably, the upper support plate 11 has flanged edges on all four sides to prevent the expansion tank 3 from shifting forward, backward, left, or right. A drainage clearance hole is provided in the center for easy daily maintenance. The upper support plate 11 has a simple structure and a lightweight design, reducing the bending moment at the top of the back plate 12 while meeting the installation and positioning requirements of the expansion tank 3.

[0065] The lower support plate 16 extends vertically from the lower part of the back plate 12, with a larger area than the upper support plate 11, and is used to support the unit body 2. Rubber vibration damping pads are embedded at the four corners to isolate the unit fan 26 from road vibration. The plate body is also provided with flanges around its perimeter to further improve local rigidity and ensure that the unit body 2 remains stable under bumpy conditions.

[0066] The bracket 15 is connected to the bottom side of the lower support plate 16, extending vertically downwards and then horizontally forwards to form a concave, low-center-of-gravity support for mounting the vehicle charger. The base plate of the bracket 15 has louvered holes to enhance heat dissipation, and multiple rows of horizontal threaded holes ensure compatibility with chargers of different specifications. The bracket 15 and the lower support plate 16 work together to lower the overall center of gravity, improving the lateral stability of the vehicle.

[0067] Mounting bracket 1 enables the longitudinal stacking of expansion tank 3, unit body 2, and charger, making full use of vertical space while taking into account load-bearing capacity, vibration reduction, and ease of maintenance.

[0068] Based on the above specific embodiments, the area of ​​the upper support plate 11 is smaller than that of the lower support plate 16. The lower support plate 16 is located at one-third of the height of the back plate 12, and its lower surface is reinforced and connected to the back plate 12 by a diagonal beam 14 to form a triangular support structure.

[0069] In some embodiments, the upper support plate 11 and the lower support plate 16 form a trapezoidal layout with the upper plate being lighter and the lower plate being heavier in terms of area and height.

[0070] The upper support plate 11 is a rectangular support plate with a smaller plane area than the lower support plate 16, and is used only to support the expansion tank 3. While meeting the installation and surrounding limit requirements of the expansion tank 3, the upper support plate 11 minimizes the cantilever length and significantly reduces the bending moment at the top of the back plate 12, achieving both weight and size reduction.

[0071] The lower support plate 16 is located at one-third of the height of the back plate 12, that is, within the lower third of the back plate 12. This low-position arrangement lowers the center of gravity of the generator body 2, bringing it closer to the center of gravity of the side-mounted battery pack 5 on the vehicle frame 4, resulting in better overall vehicle roll stability. The lower support plate 16 uses a larger rectangular support plate, which, in addition to supporting the generator body 2, must also withstand vibrations and impacts during operation; the plate edge is fully flanged and embedded with rubber damping pads, simultaneously improving rigidity and vibration isolation performance.

[0072] To suppress the bending moment caused by the large cantilever, a pair of inclined beams 14 are added between the bottom of the lower support plate 16 and the back plate 12. The upper ends of the inclined beams 14 are welded to the bottom corner of the outer edge of the lower support plate 16, and the lower ends converge at the root of the back plate 12, forming a triangular truss. This structure directly guides the gravity and dynamic load of the unit body 2 back to the root of the back plate 12, effectively relieving stress concentration at the root of the lower support plate 16, and strictly controlling the maximum deflection at the cantilever end within the design threshold, ensuring strength and fatigue life under long-term vibration conditions.

[0073] Based on the above specific embodiments, at least two slide rails perpendicular to the back plate 12 are fixed on the upper surface of the lower support plate 16; a slider is correspondingly provided on the bottom surface of the unit body 2, the slider and the slide rail are slidably engaged, and the unit body 2 slides along the slide rail to slide to the preset installation position.

[0074] In some embodiments, the lower support plate 16 adopts a drawer-type slide rail-slider structure, and the unit body 2 can slide in or out as a whole in a direction perpendicular to the back plate 12, so as to achieve tool-free quick disassembly and quick assembly.

[0075] Two high-strength slide rails are fixed parallel to each other on the upper surface of the lower support plate 16, with the rail direction perpendicular to the back plate 12, that is, extending from the outside to the inside of the frame 4. The slide rail cross-section is T-shaped, inverted Ω-shaped, or dovetail-shaped, with an open top and inwardly turned edges on both sides, forming both anti-detachment tracks for the slider and dustproof edges. The center distance between the two slide rails matches the standard hole spacing of the base of the unit body 2, ensuring completely symmetrical force distribution.

[0076] The base of the unit body 2 is connected to the slide rail via four steel or engineering plastic sliders. The sliders have built-in double-row ball bearings or wear-resistant sliding plates, and the rated dynamic load meets the requirements for full-load push and pull. Preferably, the front end of the slider is provided with a recessed limiting platform, which automatically falls into the anti-reverse notch at the end of the slide rail when pushed to the bottom, preventing slippage caused by the vibration of the traveling vehicle.

[0077] During installation, hoist the unit body 2 to the front end of the lower support plate 16, align the slider with the slide rail inlet, and gently push it; once the unit body 2 is in place, it will be bolted to the lower support plate 16, completing the installation in one step. Alternatively, a flexible locking pin connection method can be used, where a flexible locking pin is built into the end of the slide rail. After the slider is in place, the flexible locking pin automatically springs up to complete a secondary locking, requiring no tools and zero adjustment. During maintenance, simply pull out the pin, and the unit body 2 can be pulled out along the slide rail without disassembling the pipes and cables, saving time and effort.

[0078] Furthermore, triangular ribs are welded between the base of the slide rail and the back plate 12 to ensure that the cantilever end does not undergo plastic deformation under push and pull loads; a detachable brush is provided at the slide rail opening to effectively block mud and sand and extend the slide rail's lifespan.

[0079] Based on the above specific embodiments, the connecting part is a connecting plate 13 fixed on the mounting frame 1. The plate surface is provided with connecting holes. After being aligned with the mounting holes on the outer wall of the frame 4, it is locked by connecting parts. The bottom surface of the unit body 2 is higher than the bottom surface of the frame 4, forming a lifting installation.

[0080] In some embodiments, the connecting part is a rectangular high-strength steel plate or aluminum alloy plate, longitudinally centered and welded or bolted to the back plate 12 of the mounting bracket 1. Four or more circular or oblong connecting holes are evenly distributed on the plate surface, with each hole corresponding to a pre-drilled mounting hole on the outer wall of the frame 4. During installation, the connecting plate 13 is fitted against the frame 4, high-strength bolts or rivets are inserted into the holes and locked in place, achieving a rigid connection between the mounting bracket 1 and the frame 4.

[0081] After installation, the bottom of the generator unit 2 is higher than the lower wing surface of the frame 4, forming a raised layout. The raised height effectively isolates it from dust, water, and snow corrosion; it also provides space for heat dissipation and maintenance of the charger, wiring harness, and brake lines below; the center of gravity of the generator unit 2 is higher than the torsional center of the frame 4, thus improving the overall vehicle's lateral stability.

[0082] Based on the above specific embodiments, the connecting holes are multiple sets of round holes arranged in a vertical array on the connecting plate 13. By selecting and locking the holes, the installation height of the battery water-cooled unit can be adjusted in a step-by-step manner.

[0083] In some embodiments, the connecting plate 13 has several sets of circular holes arranged in an array along the vertical direction, with each set of holes equidistant from each other in the vertical direction, forming a stepped locking position. During installation, the operator can select the corresponding hole group at the appropriate height to align with the pre-drilled holes on the outer wall of the frame 4 according to the vehicle's wading depth, cargo box floor height, or maintenance space requirements, and lock it with bolts or rivets, so that it can be precisely raised and lowered at fixed intervals within a predetermined stroke. Thus, the battery water-cooled unit can flexibly match different frame 4 configurations and operating conditions, ensuring that the bottom surface of the unit body 2 is higher than the bottom surface of the frame 4, always maintaining a raised installation, and taking into account the triple requirements of protection, heat dissipation, and maintenance.

[0084] Based on the above specific embodiments, the connecting hole is an elongated hole opened in the vertical direction of the connecting plate 13. The connector can slide up and down and lock in the elongated hole to realize continuous fine adjustment of the height of the battery water cooling unit.

[0085] In some embodiments, the connecting plate 13 has several elongated holes, i.e., waist-shaped holes, extending vertically through it. The length of these holes is parallel to the vertical axis of the connecting plate 13, creating a continuously adjustable stroke. During installation, bolts or pins are first passed through pre-drilled mounting holes on the outer wall of the frame 4, and then inserted into the corresponding elongated holes. Utilizing the sliding range of the elongated holes, the connecting plate 13 can be continuously moved up and down within a set range, achieving stepless fine-tuning of the battery water-cooled unit's height. After adjustment, the connecting parts are tightened using nuts or locking washers, locking the battery water-cooled unit at the desired height and meeting the dynamic requirements for wading depth, bottom clearance, and maintenance access in real time.

[0086] Based on the above specific embodiments, pads of various thicknesses are also provided. The pads can be embedded in the elongated holes, and the connectors pass through the elongated holes and press against the pads. The bottom surface of the pads presses against the bottom surface of the elongated holes.

[0087] In some embodiments, to achieve both continuous fine-tuning and graded locking within the elongated hole, the installation system is additionally equipped with a set of U-shaped and Π-shaped pads of varying thicknesses. These pads can be vertically embedded into the elongated hole and can be used individually or in stacked combinations. For example, the pad thicknesses are configured in five levels: 2mm, 3mm, 5mm, 8mm, and 10mm, covering a continuous range of 2-28mm to achieve precise positioning.

[0088] During installation, according to the required height, insert the corresponding thickness or stacked pads into the elongated holes, with the bottom surface of the pads fitting against the bottom surface of the elongated holes. The connectors pass through the elongated holes and press against the top surface of the pads. After tightening, the weight of the unit body 2 is transferred to the bottom surface of the elongated holes through the pads, transferring the locking force of the connectors to the supporting force of the pads, preventing local crushing of the hole walls and loosening of the connectors, and eliminating the risk of the unit body 2 slipping. This structure retains the continuous adjustment freedom provided by the elongated holes, while achieving reliable mechanical locking through the graded pads, allowing for immediate adjustments to changes in wading depth, base plate gap, or maintenance access, balancing flexibility and durability.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0090] The battery water-cooling device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, this utility model is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery water-cooling device, characterized in that, Arranged behind the vehicle cab (6) and sequentially arranged with the battery pack (5) fixed to the outer wall of the frame (4) along the length of the vehicle, the battery water cooling device includes a mounting frame (1) and a battery water cooling unit. The mounting frame (1) is provided with a mounting position and a connecting part. The connecting part is attached to and fixed to the outer wall of the frame (4). The opening of the mounting position is opposite to the connecting part and is open to the outside of the frame (4). The battery water cooling unit is installed into the mounting position through the side opening. The battery water cooling unit includes a unit body (2) and an expansion tank (3). The water inlet of the expansion tank (3) is connected to the water passage of the unit body (2). The unit body (2) includes an outer mounting plate (21) and an inner mounting plate (23). The outer mounting plate (21) is set back from the connecting part. Multiple unit fans (26) are arranged vertically on its surface. The inner mounting plate (23) is adjacent to the connecting part. Multiple connection ports for the cooling medium to enter and exit are arranged on its surface.

2. The battery water cooling device according to claim 1, characterized in that, The front mounting plate (22), rear mounting plate (24) and inner mounting plate (23) of the battery water-cooled unit are all provided with air inlets (25) to form a multi-directional air intake channel.

3. The battery water cooling device according to claim 2, characterized in that, The rear panel of the vehicle cab (6) and the front mounting plate (22) maintain a preset gap. The rear panel and the upper end of the front upright plate of the mounting bracket (1) are connected by a connecting rod to form a multi-point connection.

4. The battery water cooling device according to claim 1, characterized in that, The mounting bracket (1) includes a back plate (12), an upper support plate (11) and a lower support plate (16), with both support surfaces extending vertically from the back plate (12) in a cantilever manner; the expansion tank (3) is installed on the upper support plate (11), and the unit body (2) is located on the lower support plate (16), with a bracket (15) for supporting the charger fixed to the bottom side of the lower support plate (16).

5. The battery water cooling device according to claim 4, characterized in that, The area of ​​the upper support plate (11) is smaller than that of the lower support plate (16). The lower support plate (16) is located at one-third of the height of the back plate (12). Its lower surface is reinforced and connected to the back plate (12) by a diagonal beam (14) to form a triangular support structure.

6. The battery water cooling device according to claim 4, characterized in that, At least two slide rails perpendicular to the back plate (12) are fixed on the upper surface of the lower support plate (16); a slider is correspondingly provided on the bottom surface of the unit body (2), the slider slides in cooperation with the slide rails, and the unit body (2) slides along the slide rails to slide to the preset installation position.

7. The battery water-cooling device according to claim 1, characterized in that, The connecting part is a connecting plate (13) fixed on the mounting frame (1). The plate surface is provided with connecting holes. After being aligned with the mounting holes on the outer wall of the frame (4), it is locked by connecting parts. The bottom surface of the unit body (2) is higher than the bottom surface of the frame (4), forming a lifting installation.

8. The battery water cooling device according to claim 7, characterized in that, The connection holes are multiple sets of round holes arranged in a vertical array on the connection plate (13). By selecting and locking the holes, the installation height of the battery water-cooled unit can be adjusted in a step-by-step manner.

9. The battery water cooling device according to claim 7, characterized in that, The connecting hole is an elongated hole opened vertically in the connecting plate (13). The connecting piece can slide up and down and lock in the elongated hole to realize continuous fine adjustment of the height of the battery water cooling unit.

10. The battery water-cooling device according to claim 9, characterized in that, It is also equipped with pads of various thicknesses, which can be embedded in the elongated hole. The connector passes through the elongated hole and presses against the pad, with the bottom surface of the pad pressing against the bottom surface of the elongated hole.

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