Power battery assembly with heat dissipation and fixing structure

Abstract

The present application belongs to the technical field of electric mine vehicles, and particularly relates to a power battery assembly with a heat dissipation and fixing structure. In view of the problem that the existing new energy mine truck side battery replacement box lacks linkage locking during the battery replacement process, causing the battery box to fall and jam and to move during operation, and the heat dissipation relies on forced convection and has high energy consumption, the present application proposes the following scheme, which comprises a power battery box and a fixed bracket assembly. A plurality of single batteries are arranged in the power battery box, and a heat dissipation bottom cavity is formed in the bottom of the battery box. When the battery box is positioned, the heat dissipation bottom cavity is in communication with the outside through positioning sleeves at both ends, forming a heat dissipation channel. A locking seat is arranged above the inner inclined surface column, and the guide columns at both ends of the battery box are clamped in the locking seat. A hydraulic linkage assembly is arranged between the locking seat and the roller shaft, and when the locking seat locks the guide column, the roller shaft is also locked, realizing integrated linkage of guiding, positioning and locking. The present assembly solves the problems of battery replacement jamming, insufficient heat dissipation and poor locking reliability in the prior art.

Description

Technical Field

[0001] This invention relates to a power battery assembly, specifically a power battery assembly with heat dissipation and fixing structure, belonging to the technical field of electric mining vehicles. Background Technology

[0002] As core transportation equipment in mining operations, new energy mining trucks are rapidly transitioning from traditional diesel power to pure electric drive. Unlike commercial vehicles operating on urban roads, mining trucks operate under extreme conditions of heavy loads, uphill driving, continuous high power output, and bumpy, vibrating conditions, placing extremely high demands on the installed capacity and energy density of power batteries. Due to the limited safe passage space on both sides of mining trucks, side-swapping has become the mainstream technical approach. This involves using a forklift to directly remove a depleted battery box from the side and replace it with a fully charged one, shortening recharging time and improving operational efficiency. To achieve high-capacity loading within a limited space, battery boxes typically employ a multi-layered, multi-row compact layout, which presents comprehensive challenges to the heat dissipation efficiency, assembly process, and smoothness of battery swapping for the battery box and its mounting devices.

[0003] In the prior art, CN120127279B discloses a heat dissipation device for a new energy mining truck, including a fixed frame and a mounting box. The mounting box is mounted on the fixed frame and houses a power battery pack. A conductive panel is slidably mounted on the lower part of the fixed frame and fits against the bottom of the mounting box. A heat dissipation device is located at the bottom of the conductive panel, and a cooling fan is fixed to the bottom of the heat dissipation device. A control device connects the cooling fan and the conductive panel. This solution can buffer and protect the power battery pack and autonomously adjust the heat dissipation rate to maintain the battery temperature at its optimal operating state. However, this device mounts the cooling fan at the bottom of the battery and transfers heat through the conductive panel. Heat must pass through the battery pack, the mounting box bottom plate, and the conductive panel before reaching the heat dissipation device, resulting in a long heat conduction path and high thermal resistance. Furthermore, heat dissipation relies entirely on forced convection by the cooling fan, consuming battery power, which will further shorten the driving range under high-power continuous output conditions. More importantly, this device lacks integrated fixing and heat dissipation structures, resulting in low space utilization and making it difficult to meet the compact layout requirements of high-energy-density battery boxes in mining trucks. For example, announcement number CN221775678U discloses a battery swapping base and a heavy-duty truck with the same, used to mount and couple a battery swapping battery onto the truck's frame. The battery swapping base includes a fixed frame, a guide mechanism fixedly mounted on the frame and extending upwards, a battery swapping lock mechanism for securing the battery, and a battery swapping cooling interface and connector connected to the battery. The base also features a thermal management system that manages the battery's heat through the cooling interface. This solution separates the thermal management system from the battery, resulting in higher space utilization for the battery. However, the thermal management system and the locking mechanism are located in different areas of the battery swapping base. They are spatially independent and lack functional linkage. When the battery is locked, the thermal management system does not gain any energy consumption or heat dissipation efficiency due to the locking action. Furthermore, the guide mechanism of the base only provides a single initial coarse guide. When the frame has dimensional deviations due to manufacturing or use, it cannot correct the deviations step by step during the battery drop to ensure accurate alignment of the battery swapping connector. The locking mechanism also lacks hydraulic linkage or other redundant locking mechanisms, and lacks backup protection when a single locking element fails. Summary of the Invention

[0004] This invention addresses the problems of existing new energy mining truck battery swapping boxes, such as lack of linkage locking during battery swapping, leading to battery box slumping and movement during operation, as well as reliance on forced convection for heat dissipation and high energy consumption. It provides a power battery assembly with heat dissipation and fixing structure.

[0005] The present invention achieves the above objectives through the following technical solution: a power battery assembly with heat dissipation and fixing structure, including a power battery box and a fixing bracket assembly, wherein the fixing bracket assembly is fixedly connected to the side wall of the frame of the new energy mining truck, and the power battery box is detachably mounted on the fixing bracket assembly. The power battery box contains several individual batteries. A heat dissipation cavity is opened at the bottom of the power battery box. A heat conduction unit is provided between the individual batteries. The bottom end of the heat conduction unit is inserted into the heat dissipation cavity. The fixing bracket assembly includes two end brackets. The horizontal frame of the end bracket is connected to a positioning sleeve. When the power battery box is in a positioning state with the end brackets through the positioning sleeves, both ends of the heat dissipation cavity are connected to the outside through the positioning sleeves. The horizontal frame of the end bracket is vertically connected to an inner inclined column. Several rollers are rotatably connected to the inner side of the inner inclined column. The rollers are close to both ends of the power battery box. A locking seat is provided above the inner inclined column. Guide columns that are locked in the locking seat are fixed to both ends of the power battery box. A hydraulic linkage component is provided between the locking seat and the rollers. When the locking seat locks and secures the guide column, the rollers are locked and fixed in a fixed state through the hydraulic linkage component.

[0006] As a further embodiment of the present invention: individual battery cells are arranged at equal intervals in the power battery box. The heat conduction unit includes a heat conduction separator, a conical heat conduction column, and a heat conduction inner chip. The heat conduction inner chip is inserted into the heat conduction separator, and the bottom end of the heat conduction inner chip is located on the outside of the heat conduction separator. The bottom end of the heat conduction inner chip is bent in the heat dissipation cavity. The conical heat conduction column is disposed on both sides of the heat conduction inner chip, and the cone tip of the conical heat conduction column is fixedly connected to the heat conduction inner chip. The cone bottom of the conical heat conduction column is tightly attached to the side wall of the individual battery cell.

[0007] As a further embodiment of the present invention: the cavity of the heat dissipation bottom cavity is connected with several support columns, the bottom surface of the heat dissipation bottom cavity is inclined downward from both ends to the middle part, several intermediate docking through holes are opened in the middle part of the bottom surface of the heat dissipation bottom cavity, the fixed bracket assembly also includes an intermediate bracket, the horizontal frame of the intermediate bracket is connected with several positioning cones, the positioning cones are correspondingly arranged with the intermediate docking through holes, and when the power battery box and the fixed bracket assembly are aligned and connected, the positioning cones are sealed and placed in the intermediate docking through holes.

[0008] As a further embodiment of the present invention: the horizontal frame of the end bracket is provided with an air-gathering cavity, and an air-guiding channel is connected between the air-gathering cavity and the positioning sleeve. The heat dissipation bottom cavity and the air-gathering cavities of the two end brackets are connected through the positioning sleeve and the air-guiding channel.

[0009] As a further embodiment of the present invention: the horizontal frame of the end bracket is connected to an upper wind deflector and a wind guide plate. The upper wind deflector is inclined downward and positioned above the opening of the wind gathering cavity, and the wind guide plate is inclined downward and positioned below the opening of the wind gathering cavity. Furthermore, the upper surface of the wind guide plate is provided with several arc-shaped wind gathering grooves.

[0010] As a further embodiment of the present invention: a side baffle is fixedly connected to the upper end of the inner inclined column, and one end of the side baffle is fixedly connected to the vertical frame of the end bracket. Two locking seats are fixedly connected to each side baffle. Two guide columns are fixedly connected to both ends of the power battery box, and the guide columns are correspondingly arranged with the locking seats.

[0011] As a further embodiment of the present invention: the inner inclined column body and the inner bottom column body of the inner inclined column are provided with several roller grooves. The rollers are rotatably connected in the roller grooves, and part of the roller shaft is located outside the roller groove. The hydraulic linkage component includes a hydraulic cavity and a stepped surface movable cavity opened in the bottom column body of the inner inclined column. There are two hydraulic cavities. The stepped surface movable cavity is connected between the hydraulic cavity and the roller groove. A piston is installed in the large-diameter cavity of the stepped surface movable cavity near the hydraulic cavity. A push rod is fixedly connected to the piston along the same axis. The push rod is movably inserted in the small-diameter cavity of the stepped surface movable cavity near the roller groove. When the piston is subjected to hydraulic thrust, the other end of the push rod is tightly pressed against the roller shaft. A return spring is sleeved on the rod body of the push rod located in the large-diameter cavity of the stepped surface movable cavity, and the two ends of the return spring are pressed between the piston and the stepped surface of the stepped surface movable cavity. A friction block is fixedly connected to the end of the push rod that is close to the roller.

[0012] As a further embodiment of the present invention: the seat of the locking seat is provided with a guide groove, a telescopic cylinder is fixedly connected to one side of the locking seat, a push plate is movably arranged inside the seat of the locking seat, the piston rod of the telescopic cylinder is fixedly connected to one side of the push plate, two positioning pressure rods are fixedly connected to the other side of the push plate, the rod of the positioning pressure rod movably passes through one side of the guide groove wall, two positioning slots are provided on the other side of the guide groove wall, and the positioning pressure rods and positioning slots are correspondingly arranged.

[0013] As a further embodiment of the present invention: the hydraulic linkage assembly also includes an elastic anti-detachment cavity, a liquid storage cavity, and a diversion cavity formed within the locking seat. The elastic anti-detachment cavity forms an active cavity on the side of the push plate near the telescopic cylinder, and the liquid storage cavity forms an active cavity on the side of the push plate near the guide groove. An anti-detachment spring is sleeved on the piston rod of the telescopic cylinder located within the elastic anti-detachment cavity, and the two ends of the anti-detachment spring abut against the cavity wall between the push plate and the elastic anti-detachment cavity. A liquid delivery channel is connected between the liquid storage cavity and the diversion cavity, and a liquid delivery pipe is connected between the diversion cavity and the hydraulic cavity formed by each inner inclined column.

[0014] As a further embodiment of the present invention: a positioning cone sleeve is movably fitted on the tube body above the horizontal frame of the end bracket of the positioning sleeve, and a compression spring is also fitted on the tube body of the positioning sleeve. The two ends of the compression spring abut against the horizontal frame of the end bracket and the positioning cone sleeve. A vent hole is opened on the upper end of the tube body of the positioning sleeve. In the initial state, the positioning cone sleeve is fitted on the upper end of the tube body of the positioning sleeve where the vent hole is opened.

[0015] The beneficial effects of this invention are: 1. This invention includes a power battery box and a fixed bracket assembly. The fixed bracket assembly is fixedly connected to the side wall of the new energy mining truck frame, and the power battery box is detachably fixed to the fixed bracket assembly. This allows the power battery box to be installed on the side wall of the mining truck frame via the fixed bracket assembly, enabling quick assembly and disassembly in the side battery swapping mode. Since the fixed bracket assembly serves as an intermediate connecting structure, it avoids the assembly stress and disassembly difficulties caused by directly welding or rigidly fixing the power battery box to the frame. When the mining truck needs to replace the battery, simply disconnect the power battery box from the fixed bracket assembly, and the power battery box can be removed from the side using a forklift. The operation is simple and quick. At the same time, after the fixed bracket assembly is fixed to the side wall of the frame, it can serve as a standardized interface to adapt to different batches of power battery boxes and ensure that all subsequent battery boxes have a consistent positioning reference, thereby avoiding battery swapping failures caused by frame manufacturing defects or deformation. 2. The power battery box of this invention contains several individual batteries. A heat dissipation cavity is formed at the bottom of the power battery box. Heat-conducting units are installed between the individual batteries, with their bottom ends inserted into the heat dissipation cavity. The fixing bracket assembly includes two end brackets, with positioning sleeves connected to the horizontal frames of the end brackets. When the power battery box is positioned with the end brackets via the positioning sleeves, both ends of the heat dissipation cavity are connected to the outside via the positioning sleeves. The heat generated between the individual batteries is first collected and conducted to the heat dissipation cavity at the bottom of the power battery box through the heat-conducting units. Since the heat dissipation cavity is a hollow structure independent of the battery mounting area, the heat... Here, the airflow can carry it away, preventing it from accumulating between individual batteries and forming hot spots. The positioning sleeve not only achieves mechanical positioning between the power battery box and the end bracket, but also serves as a ventilation channel for the heat dissipation cavity. When the power battery box is correctly positioned on the fixed bracket assembly, the positioning sleeve connects both ends of the heat dissipation cavity to the outside atmosphere, thus forming a through airflow channel in the heat dissipation cavity. External air can enter the heat dissipation cavity from one end of the positioning sleeve, flow through the bottom of the heat conduction unit, and then exit from the other end of the positioning sleeve, realizing plug-and-play heat dissipation in the battery swapping state without the need for additional air ducts or connectors. 3. The horizontal frame of the end bracket in this invention is vertically connected to an inner inclined column. Several rollers are rotatably connected to the inner side of the inner inclined column, and the rollers are tightly attached to both ends of the power battery box. A locking seat is provided above the inner inclined column. Guide posts, which are locked in the locking seats, are fixed to both ends of the power battery box. A hydraulic linkage component is provided between the locking seat and the rollers. When the locking seat locks the guide posts, the rollers are locked in a fixed state through the hydraulic linkage component, realizing integrated linkage control of the guiding, positioning, and locking functions of the power battery box. When the locking seat performs a locking action on the guide posts, the hydraulic linkage component simultaneously locks the rollers, thus preventing the original electric... During the battery box's descent, the rollers, which can rotate freely to reduce friction, become fixed support surfaces after locking, thus preventing the power battery box from experiencing slight horizontal movement due to vibration or bumps during vehicle operation. This working mode of first rolling guide and then locking ensures that the battery box can fall smoothly without being jammed during battery swapping, and also ensures that there is no relative movement between the battery box and the inner inclined column during operation. This avoids lateral swaying of the battery box caused by the free rotation of the rollers. Furthermore, the hydraulic linkage component does not require an additional drive source for the roller locking, achieving direct linkage between the locking seat locking the guide column and the locking and fixing of the rollers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the end structure of the power battery box of the present invention; Figure 3 This is a schematic diagram of the internal structure of the power battery box of the present invention; Figure 4 This is a schematic diagram of the heat-conducting unit structure of the present invention; Figure 5 This is a schematic diagram of the fixed bracket assembly structure of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the end bracket of the present invention; Figure 7 This is a schematic diagram of the front cross-sectional structure of the inner inclined column of the present invention; Figure 8 This is a schematic diagram of the side cross-sectional structure of the inner inclined column of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of the structure at point A in the middle; Figure 10 This is a schematic diagram of the two locking seat structures of the present invention; Figure 11 This is a cross-sectional view of the locking seat of the present invention in the open state; Figure 12 This is a cross-sectional structural diagram of the locking seat of the present invention in the locked state; Figure 13 This is a schematic diagram of the connection structure between the positioning cone sleeve and the positioning sleeve in the initial state of the present invention; Figure 14 This is a schematic diagram of the connection structure between the positioning cone sleeve and the positioning sleeve in the pressed-down state of the present invention.

[0017] In the diagram: 1. Power battery box; 11. Guide column; 12. Single cell; 13. Thermal conductive baffle; 14. Conical thermal conductive column; 15. Heat dissipation cavity; 16. Support column; 17. Thermal conductive inner chip; 18. End docking through hole; 19. Middle docking through hole; 2. Fixing bracket assembly; 21. End bracket; 22. Middle bracket; 23. Side baffle; 24. Inner inclined column; 25. Upper wind deflector; 26. Air guide plate; 27. Arc-shaped air concentrator; 28. Roller; 29. ​​Roller groove; 210. Air concentrator cavity; 211. Air guide cavity 212. Friction block; 213. Hydraulic chamber; 214. Stepped surface movable chamber; 215. Piston; 216. Push rod; 217. Return spring; 3. Locking seat; 31. Infusion pipeline; 32. Telescopic cylinder; 33. Guide groove; 34. Positioning pressure rod; 35. Positioning slot; 36. Push plate; 37. Elastic anti-detachment chamber; 38. Anti-detachment spring; 39. Liquid storage chamber; 310. Infusion channel; 311. Diversion chamber; 4. Positioning cone sleeve; 41. Positioning sleeve; 42. Compression spring; 43. Air hole; 5. Positioning cone block. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 like Figures 1 to 14As shown, a power battery assembly with heat dissipation and fixing structure includes a power battery box 1 and a fixing bracket assembly 2. The fixing bracket assembly 2 is fixedly connected to the side wall of the new energy mining truck frame. The power battery box 1 is detachably mounted on the fixing bracket assembly 2, so that the power battery box 1 is mounted on the side wall of the mining truck frame through the fixing bracket assembly 2, realizing quick disassembly and assembly in the side battery swapping mode. Since the fixing bracket assembly 2 is an intermediate connecting structure, it avoids the assembly stress and disassembly difficulties caused by direct welding or rigid fixing of the power battery box 1 to the frame. When the mining truck needs to replace the battery, it is only necessary to disconnect the connection between the power battery box 1 and the fixing bracket assembly 2, and the power battery box 1 can be taken out from the side by a forklift. The operation is simple and quick. At the same time, after the fixing bracket assembly 2 is fixed to the side wall of the frame, it can serve as a standardized interface to adapt to different batches of power battery boxes 1, and can ensure that all subsequent battery boxes have a consistent positioning reference when they are replaced, thereby avoiding battery swapping failure caused by frame manufacturing or deformation. The power battery box 1 contains several individual batteries 12. A heat dissipation cavity 15 is formed at the bottom of the power battery box 1. Heat-conducting units are installed between the individual batteries 12, with their bottom ends inserted into the heat dissipation cavity 15. The fixing bracket assembly 2 includes two end brackets 21, with positioning sleeves 41 connected to the horizontal frame of each end bracket 21. When the power battery box 1 is positioned with the end brackets 21 via the positioning sleeves 41, both ends of the heat dissipation cavity 15 are connected to the outside via the positioning sleeves 41. The heat generated between the individual batteries 12 is first collected and conducted to the heat dissipation cavity 15 at the bottom of the power battery box 1 through the heat-conducting units. Since the heat dissipation cavity 15 is a cavity structure independent of the battery mounting area, the heat... The amount of heat can be carried away by the flowing air here, and will not accumulate between the individual batteries 12 to form hot spots. The positioning sleeve 41 not only realizes the mechanical positioning between the power battery box 1 and the end bracket 21, but also serves as a ventilation channel for the heat dissipation cavity 15. When the power battery box 1 is correctly placed on the fixed bracket assembly 2, the positioning sleeve 41 connects the two ends of the heat dissipation cavity 15 with the outside atmosphere, thereby forming a through airflow channel in the heat dissipation cavity 15. The outside air can enter the heat dissipation cavity 15 from one end of the positioning sleeve 41, flow through the bottom of the heat conduction unit and then be discharged from the other end of the positioning sleeve 41, realizing plug-and-play heat dissipation in the battery swapping state without the need for additional air ducts or connectors. The horizontal frame of the end bracket 21 is vertically connected to an inner inclined column 24. Several rollers 28 are rotatably connected to the inner side of the inner inclined column 24. The rollers 28 are tightly attached to both ends of the power battery box 1. A locking seat 3 is located above the inner inclined column 24. Guide posts 11, which are locked within the locking seat 3, are fixed to both ends of the power battery box 1. A hydraulic linkage assembly is provided between the locking seat 3 and the rollers 28. When the locking seat 3 locks the guide posts 11, the rollers 28 are locked in a fixed state through the hydraulic linkage assembly, realizing integrated linkage control of the guiding, positioning, and locking functions of the power battery box 1. When the locking seat 3 performs a locking action on the guide posts 11, the hydraulic linkage assembly simultaneously locks the rollers 28, making... The roller 28, which was originally able to rotate freely during the descent of the battery box to reduce friction, becomes a fixed support surface after locking, thereby preventing the power battery box 1 from making slight horizontal movements due to vibration or bumps during vehicle operation. This working mode of first rolling guide and then locking ensures that the battery box can fall smoothly without being stuck during battery swapping, and also ensures that there is no relative movement between the battery box and the inner inclined column 24 during operation. It avoids the lateral swing of the battery box caused by the free rotation of the roller 28. Moreover, the hydraulic linkage component does not need to set an additional drive source for locking the roller 28, realizing the direct linkage of locking seat 3 to lock the guide column 11 and locking the roller 28.

[0020] Example 2 Improvements based on Example 1: like Figures 1 to 4As shown, the individual battery cells 12 are arranged at equal intervals within the power battery box 1. The heat-conducting unit includes a heat-conducting separator 13, a tapered heat-conducting column 14, and a heat-conducting inner chip 17. The heat-conducting inner chip 17 is inserted into the heat-conducting separator 13, with its bottom end located outside the heat-conducting separator 13. The bottom end of the heat-conducting inner chip 17 is bent within the heat dissipation cavity 15. The tapered heat-conducting column 14 is located on both sides of the heat-conducting inner chip 17, and the tips of the tapered heat-conducting column 14 are respectively connected to the heat-conducting inner chip. The sheet 17 is fixedly connected, and the bottom of the conical heat-conducting pillar 14 is tightly attached to the side wall of the individual battery cell 12. Since the individual batteries 12 are arranged at equal intervals in the power battery box 1, both sides of each individual battery cell 12 are tightly attached to the bottom of the conical heat-conducting pillar 14. The conical structure increases the contact area, allowing heat to be efficiently transferred from the side wall of the battery to the conical heat-conducting pillar 14. The tip of the conical heat-conducting pillar 14 is fixedly connected to the heat-conducting inner chip 17. Due to the small cross-sectional area of ​​the tip, heat forms a heat flux density at this point. The heat-concentrating structure accelerates the conduction of heat through the internal heat-conducting chip 17, similar to the heat-concentrating effect of a heat pipe. The heat-conducting separator 13 isolates adjacent individual cells 12 and prevents thermal short circuits. Simultaneously, the internal heat-conducting chip 17 extends downward through the heat-conducting separator 13 into the heat dissipation cavity 15, where it bends horizontally or at an angle. This bending design expands the heat exchange area between the internal heat-conducting chip 17 and the air in the heat dissipation cavity 15, allowing for more thorough heat exchange within the cavity. Furthermore, the symmetrical arrangement of the conical heat-conducting pillars 14 on both sides balances the heat dissipation conditions on both sides of the individual cells 12, avoiding uneven temperature distribution within the battery pack. For high-power continuous discharge conditions like those in mining trucks, a uniform temperature field can effectively extend battery cycle life. It should be noted that the internal heat-conducting chip 17 can be made of copper or aluminum alloy, and the conical heat-conducting pillars 14 can be made of copper heat pipes or aluminum heat-conducting pillars. Both the internal heat-conducting chip 17 and the conical heat-conducting pillars 14 are made of highly thermally conductive metal materials. In this embodiment, the thermally conductive inner chip 17 is made of T2 pure copper, with a thermal conductivity of approximately 390 W / (m·K); the tapered thermally conductive pillar 14 is a copper heat pipe filled with a phase change working fluid, achieving an equivalent thermal conductivity of 380-403 W / (m·K). This forms a complete heat conduction path from the sidewall of the single cell 12, through the tapered thermally conductive pillar 14, the thermally conductive inner chip 17, to the heat dissipation cavity 15. The thermally conductive partition 13 is made of aluminum alloy plate, with a through hole for the thermally conductive inner chip 17 to pass through. After passing through the through hole, the thermally conductive inner chip 17 extends downward into the heat dissipation cavity 15.

[0021] Furthermore, the heat dissipation cavity 15 is connected to several support columns 16. The bottom surface of the heat dissipation cavity 15 is inclined downwards from both ends to the middle. Several intermediate docking holes 19 are opened in the middle of the bottom surface of the heat dissipation cavity 15. The fixing bracket assembly 2 also includes an intermediate bracket 22. Several positioning cones 5 are connected to the horizontal frame of the intermediate bracket 22. The positioning cones 5 are correspondingly set with the intermediate docking holes 19. When the power battery box 1 is aligned and connected with the fixing bracket assembly 2, the positioning cones 5 are sealed and locked in the intermediate docking holes 19. The support columns 16 enhance the structural strength of the heat dissipation cavity 15 and prevent the bottom of the battery box from collapsing or deforming when bearing the weight of the battery and vehicle vibration. At the same time, the setting of the support columns 16 does not obstruct the airflow in the heat dissipation cavity 15. The inclined bottom surface of the heat dissipation cavity 15 can guide condensate or accidentally entered liquid to the lowest point in the middle to avoid liquid from accumulating in the middle. The bottom of the battery box accumulates corrosion on the heat-conducting units or circuits over a long period of time; secondly, the slope increases the airflow velocity in the middle part of the heat dissipation cavity 15, forming a Venturi effect, which helps to accelerate the discharge of hot air accumulated in the middle part; thirdly, if the mining truck travels on a slope, the relationship between the slope direction and the lateral roll direction of the frame can play a certain role in self-drainage; since the power battery box 1 is relatively long, positioning by only the two ends may cause the middle part to bend and deform. The cooperation between the positioning cone 5 and the middle docking hole 19 provides additional support points and lateral restraint; at the same time, the positioning cone 5 is conical, which can adaptively correct the slight positional deviation when the battery box falls, playing a role similar to a guide pin; the middle docking hole 19 is blocked by the positioning cone 5 to ensure the airtightness of the heat dissipation cavity 15, and after the power battery box 1 is removed, the condensate and other liquids accumulated on the bottom surface of the heat dissipation cavity 15 can be directly discharged through the middle docking hole 19.

[0022] like Figure 1 , Figures 5 to 9As shown, the horizontal frame of the end bracket 21 has an air-gathering cavity 210. The air-gathering cavity 210 is connected to the positioning sleeve 41 by an air guide channel 211. The heat dissipation cavity 15 and the air-gathering cavities 210 of the two end brackets 21 are connected through the positioning sleeve 41 and the air guide channel 211, which can introduce the oncoming air during vehicle movement into the heat dissipation cavity 15, realizing wind-assisted heat dissipation and reducing the dependence on the active cooling system. The opening of the air-gathering cavity 210 on the horizontal frame of the end bracket 21 faces the front of the vehicle's direction of travel. When the mining truck speed is high, the oncoming air rushes into the air-gathering cavity 210 and forms a certain wind pressure. This wind pressure is transmitted to the positioning sleeve 41 through the air guide channel 211. Since the positioning sleeve 41 is connected to the heat dissipation cavity 15, the air is forced from the air-gathering cavity 210 of one end bracket 21 into the heat dissipation cavity 15 and flows through the heat conduction channel. The air is discharged from the bottom of the unit through the air-gathering chamber 210 of the end bracket 21 at the other end. Since the two air-gathering chambers 210 are located in the front and rear directions of the vehicle, the forward air-gathering chamber 210 is a positive pressure zone when the vehicle moves forward, while the rear air-gathering chamber 210 forms a negative pressure zone or a low positive pressure zone due to the airflow bypassing the vehicle body. This creates a stable pressure difference in the heat dissipation chamber 15, driving the airflow. This heat dissipation method, which utilizes the existing driving kinetic energy, does not consume battery power and is especially suitable for high-power conditions such as long-distance heavy-load uphill driving of mining trucks. Under these conditions, the battery generates a lot of heat and the vehicle speed is relatively high, and the driving air can provide effective heat dissipation supplement. At the same time, the design of connecting the air-gathering chamber 210 and the positioning sleeve 41 through the air guide channel 211 makes full use of the internal space of the end bracket 21 without adding additional air ducts or external accessories, and does not affect the operating space of the forklift when the mining truck is swapped on the side.

[0023] Furthermore, the horizontal frame of the end bracket 21 is connected to an upper wind deflector 25 and an air guide plate 26. The upper wind deflector 25 is inclined downwards and positioned above the opening of the air-gathering cavity 210, while the air guide plate 26 is inclined downwards and positioned below the opening of the air-gathering cavity 210. The upper surface of the air guide plate 26 has several arc-shaped air-gathering grooves 27. The synergistic effect of the upper wind deflector 25 and the air guide plate 26 improves the air intake efficiency of the air-gathering cavity 210 and prevents debris from entering. The downward inclination of the upper wind deflector 25 guides the oncoming airflow downwards, allowing it to smoothly enter the opening of the air-gathering cavity 210, while simultaneously preventing debris such as gravel and mud from falling directly into the air-gathering cavity 210, thus avoiding wind... The air deflector 26 can guide any turbulence and dust that may be generated at the bottom of the vehicle to the area below the opening of the air collection chamber 210, reducing the possibility of dirt being sucked in. Several arc-shaped air collection slots 27 on the upper surface of the air deflector 26 can generate local low-pressure areas. The arc-shaped slots will cause the airflow to flow along the wall, thereby accelerating the air being sucked into the air collection chamber 210. When the mining truck is traveling at low speed or idling, the upper wind deflector 25 and the air deflector 26 also act as baffles to prevent hot air from flowing back, avoiding the hot air discharged from the heat dissipation chamber 15 from being re-inhaled into the air collection chamber 210 and forming a thermal short circuit. In addition, the arc-shaped air collection slots 27 can also throw rainwater to the outside in rainy weather, preventing a large amount of water from entering the heat dissipation chamber 15.

[0024] Furthermore, a side baffle 23 is fixedly connected to the upper end of the inner inclined column 24, and one end of the side baffle 23 is fixedly connected to the vertical frame of the end bracket 21. Two locking seats 3 are fixedly connected to each side baffle 23. Two guide posts 11 are fixedly connected to both ends of the power battery box 1, and the guide posts 11 are correspondingly set with the locking seats 3. The side baffle 23 serves as a reinforcing rib between the inner inclined column 24 and the end bracket 21, improving the overall rigidity, and also serves as the mounting base for the locking seats 3. The design of two locking seats 3 and two guide posts 11 at each end can more evenly distribute the force on the battery box in the longitudinal and vertical directions of the vehicle. When the mining truck accelerates rapidly or suddenly... During braking, the inertial force will cause the battery box to tend to move forward or backward. The two locking seats 3 each bear a part of the shear force, avoiding stress concentration on a single locking point that could cause plastic deformation of the guide post 11 or the locking seat 3. Secondly, the two guide posts 11 are horizontally distributed at both ends of the power battery box 1. They simultaneously constrain the rotational freedom of the battery box around the vertical and horizontal axes within the guide grooves 33 of the locking seat 3. This ensures that the battery box is completely restricted after locking, with no gaps and therefore no impact vibration. This structure can provide better resistance to deformation when the mining truck is subjected to side impacts or the risk of tipping over, protecting the battery box from being crushed and damaged.

[0025] Furthermore, the inner inclined column 24 has several roller grooves 29 on its inner inclined column body and inner bottom column body. Rollers 28 are rotatably connected within the roller grooves 29, with part of the roller 28's shaft located outside the roller grooves 29. The hydraulic linkage assembly includes a hydraulic chamber 213 and a stepped surface movable chamber 214 located within the bottom column body of the inner inclined column 24. Two hydraulic chambers 213 are provided. The stepped surface movable chamber 214 connects the hydraulic chambers 213 and the roller grooves 29. A piston 215 is installed in the large-diameter cavity of the stepped surface movable chamber 214 near the hydraulic chamber 213. The piston 215... A push rod 216 is fixedly connected to the axis. The push rod 216 is movably inserted into the small-diameter cavity of the stepped surface movable cavity 214 near the roller groove 29. The other end of the push rod 216 is tightly pressed against the shaft of the roller 28 when the piston 215 is subjected to hydraulic thrust. A return spring 217 is sleeved on the push rod 216 located in the large-diameter cavity of the stepped surface movable cavity 214, and the two ends of the return spring 217 are pressed against the piston 215 and the stepped surface of the stepped surface movable cavity 214. A friction block 212 is fixedly connected to one end of the push rod 216 that is close to the roller 28. The two hydraulic cavities 213 are independent. The pistons 215 and push rods 216 are driven by the rollers, forming two completely independent and parallel hydraulic working paths. Under normal operating conditions, both hydraulic paths simultaneously apply locking force to the roller 28, and the friction blocks 212 further enhance the locking force. Because the two push rods 216 act at different positions on the roller 28, the roller 28 receives evenly distributed two-point support locking. Even if one hydraulic path fails due to pipeline leakage, seal aging, piston 215 jamming, or internal blockage of the hydraulic chamber 213, the other hydraulic path can still work independently and continue to drive the roller 28. The corresponding push rod 216 locks the roller 28. Although the roller 28 is only subjected to the locking force of the push rod 216 on one side at this time, in addition, each of the two hydraulic chambers 213 is equipped with an independent piston 215, push rod 216 and return spring 217. When the hydraulic pressure is released, the return spring 217 of each path independently pushes its respective piston 215 back to its original position. Even if one of the return springs 217 fails due to fatigue fracture, the other return spring 217 can still pull back its corresponding push rod 216 to ensure that the roller 28 can resume free rotation during the power swap, thereby ensuring the smoothness of the power swap operation.

[0026] like Figure 1 , Figure 10 , Figure 11 and Figure 12As shown, the locking seat 3 has a guide groove 33 on its body. A telescopic cylinder 32 is fixedly connected to one side of the locking seat 3. A push plate 36 is movably arranged inside the locking seat 3. The piston rod of the telescopic cylinder 32 is fixedly connected to one side of the push plate 36. Two positioning rods 34 are fixedly connected to the other side of the push plate 36. The rod of the positioning rod 34 moves through one side of the guide groove 33. Two positioning slots 35 are opened on the other side of the guide groove 33. The positioning rods 34 and the positioning slots 35 are arranged correspondingly. When the telescopic cylinder 32 extends, the push plate 36 pushes the two positioning rods 34 through the guide groove 33, pressing the guide post 11 laterally and embedding the front end of the positioning rod 34 into the positioning slot 35, thereby locking the guide post 11 in the guide groove 33. The use of two positioning rods 34 can provide a more stable constraint on the guide post 11, further improving safety.

[0027] Furthermore, the hydraulic linkage assembly also includes an elastic anti-loosening cavity 37, a liquid storage cavity 39, and a diversion cavity 311 formed within the locking seat 3. The elastic anti-loosening cavity 37 forms the movable cavity of the push plate 36 near the telescopic cylinder 32, and the liquid storage cavity 39 forms the movable cavity of the push plate 36 near the guide groove 33. An anti-loosening spring 38 is fitted onto the piston rod of the telescopic cylinder 32 within the elastic anti-loosening cavity 37, with both ends of the anti-loosening spring 38 abutting against the cavity wall between the push plate 36 and the elastic anti-loosening cavity 37. A liquid delivery channel 310 connects the liquid storage cavity 39 and the diversion cavity 311, and a liquid delivery pipe 31 connects the diversion cavity 311 to the hydraulic cavity 213 formed by each inner inclined column 24. The anti-loosening spring 38 can maintain the push plate 36 in the locked position when the telescopic cylinder 32 unexpectedly loses pressure, playing a mechanical anti-loosening role. Even if the air supply system fails, the locking seat 3 will not immediately unlock, ensuring vehicle safety. The complete shutdown provides a buffer time; the set infusion pipeline 31 links the locking action with the locking of the roller 28. When the telescopic cylinder 32 extends and pushes the push plate 36 to lock the guide post 11, the push plate 36 simultaneously compresses the volume of the reservoir 39, forcing the hydraulic oil in the cavity into the diversion cavity 311 through the infusion channel 310, and then distributing it to the hydraulic cavities 213 of each inner inclined column 24 through the infusion pipeline 31, driving the piston 215 and push rod 216 to lock the roller 28; conversely, when the telescopic cylinder 32 retracts and unlocks, the volume of the reservoir 39 increases, generating negative pressure, the hydraulic oil flows back, and the roller 28 returns to its free state; it realizes true single-drive source dual-action linkage, without the need for separate wiring or the installation of a solenoid valve for locking the roller 28. At the same time, since the hydraulic oil is incompressible, there is almost no time delay between the locking action and the locking action of the roller 28, ensuring that the guide post 11 is locked while the roller 28 is also locked.

[0028] like Figure 5 , Figure 6 , Figure 13 and Figure 14As shown, a positioning sleeve 41 is movably fitted onto the tube body above the horizontal frame of the end bracket 21, and a compression spring 42 is also fitted onto the tube body of the positioning sleeve 41. The two ends of the compression spring 42 abut against the horizontal frame of the end bracket 21 and the positioning cone sleeve 4. A vent 43 is opened at the upper end of the tube body of the positioning sleeve 41. In the initial state, the positioning cone sleeve 4 is fitted onto the upper end of the tube body of the positioning sleeve 41 where the vent 43 is opened. When the power battery box 1 falls, the end connecting through hole 18 opened in the heat dissipation cavity 15 at its bottom first contacts the conical surface of the positioning cone sleeve 4. Since the positioning cone sleeve 4 can slide up and down along the positioning sleeve 41, as the power battery box 1 falls, it forces the positioning cone sleeve 4 to overcome the compression spring 42. The battery box moves downwards. During this movement, the vent 43 on the upper part of the positioning sleeve 41, which was originally covered by the positioning cone sleeve 4, is gradually exposed, thereby connecting the internal channel of the heat dissipation cavity 15 and the positioning sleeve 41. When the battery box is fully in place, the positioning cone sleeve 4 is pressed to the lowest position, the vent 43 is fully opened, and the heat dissipation cavity 15 can be connected to the air guide channel 211 and the air gathering cavity 210 through the vent 43 of the positioning sleeve 41. When the battery box is removed, the compression spring 42 pushes the positioning cone sleeve 4 back to its initial position, covering the vent 43 again. At the same time, the elasticity of the compression spring 42 also buffers the impact force when the power battery box 1 falls to the bottom, protecting the positioning sleeve 41 and the bottom of the power battery box 1 from hard impact damage.

[0029] Working principle: When the power battery box 1 needs to be installed on the mine car, a forklift is used to lift and lower the power battery box 1 from the side. The bottom heat dissipation cavity 15 of the power battery box 1 has end docking through holes 18 at both ends. At the same time, the horizontal frame of the end bracket 21 is connected to the positioning sleeve 41. The positioning sleeve 41 is movably fitted with a positioning cone sleeve 4 and the body of the positioning sleeve 41 is fitted with a compression spring 42. In the initial state, the positioning cone sleeve 4 covers the vent 43 at the upper end of the positioning sleeve 41. When the power battery box 1 falls, the edge of its end docking through hole 18 first contacts the cone surface of the positioning cone sleeve 4, forcing the positioning cone sleeve 4 to overcome the compression spring 42 and slide down along the positioning sleeve 41, thereby gradually exposing the vent 43, connecting the heat dissipation cavity 15 with the internal channel of the positioning sleeve 41. At the same time, the cone surface of the positioning cone sleeve 4 guides the power battery box 1 to be centered in the horizontal direction. As the power battery box 1 continues to fall, its two ends contact the rollers 28 on the inner side of the inner inclined column 24. The rollers 28 rotate freely in the roller groove 29, converting sliding friction into rolling friction, guiding the power battery box 1 to fall smoothly to the bottom. The middle docking through hole 19 in the middle part of the heat dissipation cavity 15 seals and engages with the positioning cone 5 on the middle bracket 22, providing auxiliary support and lateral limit. After the power battery box 1 is positioned, the locking seat 3 is activated. The telescopic cylinder 32, fixed to one side of the locking seat 3, extends and pushes the push plate 36 to move. The two positioning rods 34, fixed to the other side of the push plate 36, pass through the guide groove 33, pressing the guide post 11 laterally and embedding the front end of the positioning rod 34 into the positioning slot 35 on the other side of the guide groove 33, thereby locking the guide post 11. At the same time, the anti-detachment spring 38 in the elastic anti-detachment cavity 37 inside the locking seat 3 is sleeved on the piston rod of the telescopic cylinder 32, maintaining the lock when pressure is lost. When the push plate 36 moves, it simultaneously compresses the volume of the liquid storage cavity 39, forcing hydraulic oil into the diversion cavity 311 through the liquid delivery channel 310. The fluid is then transported via the infusion pipe 31 to two hydraulic chambers 213 opened at the bottom of each inner inclined column 24. The hydraulic oil pushes the piston 215 in the large-diameter chamber of the stepped movable chamber 214. The piston 215 drives the push rod 216 to extend along the small-diameter chamber. The end of the push rod 216 tightly abuts against the shaft of the roller 28, locking the roller 28 and changing the roller 28 from a free-rotating state to a fixed support surface, preventing the power battery box 1 from moving horizontally. When the telescopic cylinder 32 retracts and unlocks, the volume of the reservoir 39 increases, generating negative pressure. The hydraulic oil flows back, and the return spring 217 pushes the piston 215 and the push rod 216 back, and the roller 28 resumes free rotation. During vehicle operation, the opening of the air-gathering cavity 210 on the horizontal frame of the end bracket 21 faces the front of the vehicle. The upper wind deflector 25 tilts downward to guide the oncoming wind and block debris. The air guide plate 26 tilts downward and has an arc-shaped air-gathering groove 27 to accelerate the airflow. The oncoming wind pressure enters the heat dissipation cavity 15 through the air guide cavity 211 and the air hole 43 of the positioning sleeve 41. At the same time, the individual batteries 12 in the power battery box 1 are arranged at equal intervals. The heat conduction unit between the individual batteries 12 includes a heat conduction partition 13, a conical heat conduction column 14, and a heat conduction inner chip 17. The conical heat-conducting column 14 has its bottom tightly attached to the side wall of the single cell 12, and its tip is connected to the heat-conducting inner chip 17. The heat-conducting inner chip 17 extends downward through the heat-conducting separator 13 into the heat dissipation cavity 15 and bends, conducting the battery heat to the heat dissipation cavity 15. The flowing air enters from one end of the air-gathering cavity 210, flows through the bent part of the heat-conducting inner chip 17 and the heat dissipation cavity 15, and exits from the other end of the air-gathering cavity 210, forming a driving wind to assist in heat dissipation. At the same time, the slope of the heat dissipation cavity 15 guides the condensate to converge in the middle and exits through the middle connecting hole 19.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power battery assembly with a heat dissipation and fixing structure, comprising a power battery box (1) and a fixing bracket assembly (2), characterized in that: The fixed bracket assembly (2) is fixedly connected to the side wall of the new energy mining truck frame, and the power battery box (1) is detachably mounted on the fixed bracket assembly (2). The power battery box (1) is provided with a number of individual batteries (12). The bottom of the power battery box (1) is provided with a heat dissipation cavity (15). A heat conduction unit is provided between the individual batteries (12). The bottom end of the heat conduction unit is inserted into the heat dissipation cavity (15). The fixed bracket assembly (2) includes two end brackets (21). The end brackets (21) are horizontally connected to a positioning sleeve (41). When the power battery box (1) is in a positioning state with the end brackets (21) through the positioning sleeve (41), the two ends of the heat dissipation cavity (15) are connected to the outside through the positioning sleeve (41). The end bracket (21) has a horizontal frame with a vertically connected inner inclined column (24). The inner side of the inner inclined column (24) is rotatably connected with several rollers (28). The rollers (28) are close to both ends of the power battery box (1). A locking seat (3) is provided above the inner inclined column (24). The two ends of the power battery box (1) are fixedly connected with guide columns (11) that are locked in the locking seat (3). A hydraulic linkage component is provided between the locking seat (3) and the rollers (28). When the locking seat (3) locks and secures the guide column (11), the rollers (28) are in a locked and fixed state through the hydraulic linkage component.

2. The power battery assembly with heat dissipation and fixing structure according to claim 1, characterized in that: The individual battery cells (12) are arranged at equal intervals in the power battery box (1). The heat conduction unit includes a heat conduction partition (13), a conical heat conduction column (14), and a heat conduction inner chip (17). The heat conduction inner chip (17) is inserted into the heat conduction partition (13), and the bottom end of the heat conduction inner chip (17) is located outside the heat conduction partition (13). The bottom end of the heat conduction inner chip (17) is bent in the heat dissipation cavity (15). The conical heat conduction column (14) is located on both sides of the heat conduction inner chip (17), and the cone tip of the conical heat conduction column (14) is fixedly connected to the heat conduction inner chip (17). The cone bottom of the conical heat conduction column (14) is tightly attached to the side wall of the individual battery cell (12).

3. The power battery assembly with heat dissipation and fixing structure according to claim 2, characterized in that: The heat dissipation cavity (15) is connected to several support columns (16). The bottom surface of the heat dissipation cavity (15) is inclined downward from both ends to the middle. Several intermediate docking through holes (19) are opened in the middle part of the bottom surface of the heat dissipation cavity (15). The fixed bracket assembly (2) also includes an intermediate bracket (22). Several positioning cones (5) are connected to the horizontal frame of the intermediate bracket (22). The positioning cones (5) are correspondingly arranged with the intermediate docking through holes (19). When the power battery box (1) is aligned and connected with the fixed bracket assembly (2), the positioning cones (5) are sealed and placed in the intermediate docking through holes (19).

4. The power battery assembly with heat dissipation and fixing structure according to claim 1, characterized in that: The horizontal frame of the end bracket (21) is provided with a gathering air cavity (210), and the gathering air cavity (210) is connected to the positioning sleeve (41) by a guide air channel (211). The heat dissipation bottom cavity (15) and the gathering air cavities (210) of the two end brackets (21) are connected by the positioning sleeve (41) and the guide air channel (211).

5. The power battery assembly with heat dissipation and fixing structure according to claim 4, characterized in that: The horizontal frame of the end bracket (21) is connected to an upper wind deflector (25) and a wind guide (26). The upper wind deflector (25) is inclined downwards and is located above the opening of the wind gathering cavity (210). The wind guide (26) is inclined downwards and is located below the opening of the wind gathering cavity (210). The upper surface of the wind guide (26) is provided with several arc-shaped wind gathering grooves (27).

6. The power battery assembly with heat dissipation and fixing structure according to claim 1, characterized in that: The upper end of the inner inclined column (24) is fixedly connected to a side baffle (23), and one end of the side baffle (23) is fixedly connected to the vertical frame of the end bracket (21). Two locking seats (3) are fixedly connected to each side baffle (23). Two guide columns (11) are fixedly connected to both ends of the power battery box (1), and the guide columns (11) are correspondingly set with the locking seats (3).

7. The power battery assembly with heat dissipation and fixing structure according to claim 1, characterized in that: The inner inclined column (24) has several roller grooves (29) on its inner inclined column body and inner bottom column body. The roller (28) is rotatably connected in the roller groove (29), and part of the roller (28) is located outside the roller groove (29). The hydraulic linkage assembly includes a hydraulic cavity (213) and a stepped surface movable cavity (214) opened in the bottom column body of the inner inclined column (24). There are two hydraulic cavities (213). The stepped surface movable cavity (214) is connected between the hydraulic cavity (213) and the roller groove (29). A piston (215) is placed in the large-diameter cavity of the stepped surface movable cavity (214) near the hydraulic cavity (213). A push rod (216) is coaxially fixed to the piston (215). The push rod (216) is movably inserted into the small-diameter cavity of the stepped surface movable cavity (214) near the roller groove (29). The other end of the push rod (216) is tightly pressed against the shaft of the roller (28) when the piston (215) is subjected to hydraulic thrust. A return spring (217) is sleeved on the rod of the push rod (216) located in the large-diameter cavity of the stepped surface movable cavity (214). The two ends of the return spring (217) are pressed against the piston (215) and the stepped surface of the stepped surface movable cavity (214). A friction block (212) is fixedly connected to one end of the push rod (216) that is close to the roller (28).

8. The power battery assembly with heat dissipation and fixing structure according to claim 7, characterized in that: The locking seat (3) has a guide groove (33) on its body. A telescopic cylinder (32) is fixedly connected to one side of the locking seat (3). A push plate (36) is movably arranged inside the locking seat (3). The piston rod of the telescopic cylinder (32) is fixedly connected to one side of the push plate (36). Two positioning rods (34) are fixedly connected to the other side of the push plate (36). The rod of the positioning rod (34) movably passes through one side of the guide groove (33). Two positioning slots (35) are opened on the other side of the guide groove (33). The positioning rod (34) and the positioning slots (35) are arranged in a corresponding manner.

9. The power battery assembly with heat dissipation and fixing structure according to claim 8, characterized in that: The hydraulic linkage assembly also includes an elastic anti-detachment cavity (37), a liquid storage cavity (39), and a diversion cavity (311) opened in the locking seat (3). The elastic anti-detachment cavity (37) forms an active cavity on the side of the push plate (36) near the telescopic cylinder (32). The liquid storage cavity (39) forms an active cavity on the side of the push plate (36) near the guide groove (33). The piston rod of the telescopic cylinder (32) is fitted with an anti-detachment spring (38) on the rod body inside the elastic anti-detachment cavity (37). The two ends of the anti-detachment spring (38) abut against the cavity wall between the push plate (36) and the elastic anti-detachment cavity (37). The liquid storage cavity (39) and the diversion cavity (311) are connected by a liquid delivery channel (310). The diversion cavity (311) is connected to the hydraulic cavity (213) opened in each inner inclined column (24) by a liquid delivery pipe (31).

10. The power battery assembly with heat dissipation and fixing structure according to claim 1, characterized in that: The positioning sleeve (41) is located above the horizontal frame of the end bracket (21) and a positioning cone sleeve (4) is movably fitted on the tube body. The tube body of the positioning sleeve (41) is also limited by a compression spring (42). The two ends of the compression spring (42) abut against the horizontal frame of the end bracket (21) and the positioning cone sleeve (4). The upper end of the positioning sleeve (41) has an air hole (43). In the initial state, the positioning cone sleeve (4) is fitted on the upper end of the positioning sleeve (41) where the air hole (43) is opened.

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