Power battery box

Abstract

The invention provides a power battery box, and relates to the technical field of new energy batteries, the power battery box comprises a box body and a supporting walking mechanism, the supporting walking mechanism is installed at the bottom of the box body and comprises supporting legs and a lifting type walking wheel mechanism, and the lifting type walking wheel mechanism comprises a driving transmission assembly, a walking support and walking wheels installed at the bottom of the walking support; the driving transmission assembly is fixed to the bottom wall of the box body, connected with the walking support and used for driving the walking support to ascend and descend relative to the box body so that the walking wheels can ascend to the first position or descend to the second position, and when the walking wheels are located at the first position, the bottom faces of the walking wheels are not lower than the bottom faces of the supporting legs; and the bottom surfaces of the travelling wheels are lower than the bottom surfaces of the supporting legs. By arranging the supporting legs and the supporting walking mechanism of the lifting type walking wheel mechanism, flexible switching between the moving state and the fixed state of the power battery box is achieved, the stability and smoothness of the power battery box in the moving process and the supporting stability of the power battery box in the fixing process are both considered, and operation is convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and more particularly to a power battery box. Background Art

[0002] With the rapid development of new energy technologies, the power battery system, as the core part of new energy devices, has been widely used in multiple fields such as electric vehicles, energy storage systems, and mobile devices. The power battery system is a complex system with a highly modular design. The battery cell is the smallest unit of the power battery system, generally a lithium-ion battery cell group; multiple battery cells are combined together in series or parallel to form a standardized battery module; the power battery box houses one or more battery modules and integrates a battery management system (BMS) and a power distribution system to achieve status monitoring and balancing control of the one or more battery modules accommodated in its box body. The power battery box is the overall unit finally installed on devices (such as electric vehicles and energy storage cabinets). In order to meet the requirements of high energy density and high-power output, the power battery box often needs to integrate a large number of battery modules to meet the operation requirements of the devices. This causes the following problems during the use of the power battery box: The power battery box integrating a large number of battery modules has a large volume and weight, making it extremely inconvenient to transport and install the power battery box in scenarios such as temporary energy storage sites or operations in remote areas. It must rely on professional equipment for handling and placement, increasing costs and operational complexity and restricting the application flexibility of the battery box.

[0003] Although in the prior art, universal wheels are provided at the bottom of some power battery boxes, the universal wheels usually adopt a brake pad type locking mechanism and are fixed by mechanically pressing the wheel axle or the wheel surface. When the power battery box needs to be moved, the operator lifts the brake pads to move it, and when it needs to be fixed, the brake pads are made to fall back to contact the wheel surface or the ground. Although this design solves the problem of moving the battery box to a certain extent, there are still many deficiencies in actual applications: (1) When the operator lifts and falls the brake pads, each wheel needs to be operated one by one, which is complex and inconvenient: (2) During transportation, the brake pads are prone to fall and touch the ground due to vibration, resulting in the passive braking of the power battery box. In addition to the need for frequent adjustment, which increases operational complexity, it will also cause damage to the battery modules and power distribution system in the box due to bumps; (3) In the fixed state, although the universal wheels are locked by the brake pads, due to the limited contact area between the universal wheels and the ground, and the uneven weight distribution of the box body in most cases, the power battery box is prone to displacement, affecting the normal use and safety of the power battery box. Especially in some working scenarios with high stability requirements, this problem will be more prominent and cannot well meet the actual application needs. Summary of the Invention

[0004] The purpose of the present invention is to provide a power battery box to alleviate the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above purpose, the embodiments of the present invention adopt the following technical solutions: The embodiments of the present invention provide a power battery box, which includes a box body and a support walking mechanism: The support walking mechanism is installed at the bottom of the box body and includes support legs and a lifting wheel mechanism. The lifting wheel mechanism includes a driving transmission component, a walking bracket, and wheels installed at the bottom of the walking bracket. The driving transmission component is fixed to the bottom wall of the box body and is connected to the walking bracket, and is used to drive the walking bracket to lift relative to the box body so that the wheels rise to a first position or descend to a second position. When the wheels are in the first position, the bottom surface height of the wheels is not lower than the bottom surface height of the support legs. When the wheels are in the second position, the bottom surface height of the wheels is lower than the bottom surface height of the support legs.

[0006] In an optional embodiment, the walking bracket includes a movable carrier, two movable crossbars, and two groups of hinge rods. The wheel frame of the wheels is fixedly installed on the movable carrier. The movable carrier has a first direction and a second direction perpendicular to each other in the horizontal plane, where: the two movable crossbars both extend along the second direction and are arranged at intervals along the first direction above the movable carrier; along the first direction, the two groups of hinge rods are arranged at opposite ends of the movable carrier, and one end of each group of hinge rods is hinged to the corresponding end of the movable carrier, and the other end is hinged to one of the movable crossbars close to the corresponding hinge rod; The driving transmission component includes a bidirectional screw and a driving motor; The bidirectional screw extends along the first direction and its two ends are rotatably installed on the bottom wall of the box body; the two movable crossbars are respectively threadedly sleeved on the outer parts of two threaded rod segments with opposite screw directions of the bidirectional screw; The driving motor is fixed to the bottom wall of the box body and its output shaft is connected to one end of the bidirectional screw, and is used to drive the bidirectional screw to rotate, so that the two groups of movable crossbars move relative to or away from each other, thereby driving the two groups of hinge rods to rotate, and further driving the movable carrier to lift relative to the box body so that the wheels rise to the first position or descend to the second position.

[0007] In an alternative embodiment, the drive transmission assembly includes two bidirectional screws arranged at intervals along the second direction, and the output shaft of the drive motor is connected to the end of one of the bidirectional screws; the drive transmission assembly further includes a first transmission wheel and a second transmission wheel, the first transmission wheel and the second transmission wheel are respectively fixedly sleeved outside one end of two groups of the bidirectional screws, and the first transmission wheel and the second transmission wheel are connected by a transmission belt or a transmission chain; each group of the movable cross frames is simultaneously threadedly sleeved on the two bidirectional screws; And / or, each group of the hinge rods respectively includes a first hinge rod and a second hinge rod arranged at intervals along the second direction of the movable bearing frame.

[0008] In an alternative embodiment, a connecting groove is provided on the movable cross frame, a rotating shaft is fixed in the connecting groove, and one end of the hinge rod is inserted into the connecting groove and rotatably sleeved outside the rotating shaft.

[0009] In an alternative embodiment, the drive motor is fixedly installed on the side wall of the support leg, the support leg is provided with a mounting hole, and the end of the bidirectional screw is rotatably installed inside the mounting hole.

[0010] In an alternative embodiment, a battery pack insulation isolation frame is fixedly installed inside the box body; The battery pack insulation isolation frame is provided with a plurality of battery compartments and a plurality of groups of limiting structures corresponding to each of the battery compartments one by one; the openings of the plurality of battery compartments all face the same side wall of the box body, and contact connection terminals are fixedly installed on the inner walls of each of the battery compartments, and the limiting structure is used to fix a battery cell in the corresponding battery compartment when the battery cell is fixed in the battery compartment, so that the contact connection terminal is in contact with the electrode end of the battery cell; A battery pack controller is provided on the outer side wall of the box body, and the contact connection terminals in the plurality of battery compartments are all electrically connected to the battery pack controller, and the battery pack controller can control the circuit connection relationship between the plurality of battery compartments; a charge and discharge plug is fixedly connected to the battery pack controller.

[0011] In an alternative embodiment, the limiting structure includes a limiting housing and a locking plate; Taking the orientation of the opening of the battery compartment as the front side of the box body, the limiting housing is arranged at a position corresponding to the opening of each battery compartment on the front side surface of the battery pack insulation isolation frame, the limiting housing is a U-shaped member protruding towards the front side of the box body and penetrating up and down, and a guiding hole extending in the vertical direction is opened on the front side wall of the limiting housing; The locking plate is vertically inserted into the interior of the limiting housing. A handle is fixed to the front side of the locking plate, and the handle passes through the guiding hole. In the free state, the locking plate extends downward out of the limiting housing and blocks the front side of the corresponding battery compartment opening. Driving the handle to slide upward along the guiding hole can drive the locking plate to slide upward relative to the limiting housing, thereby opening the corresponding battery compartment opening.

[0012] In an alternative embodiment, with the orientation of the battery compartment opening being the front side of the box body, the box body includes a box door covering the openings of multiple battery compartments. A plugging track is fixedly installed on the peripheral wall of the box body, and a plugging interface is provided at the top of the plugging track. The box door is plugged into the interior of the plugging track from the plugging interface, and a box door handle is provided on the top or outside of the box door.

[0013] In an alternative embodiment, with the orientation of the battery compartment opening being the front side of the box body, ventilation openings are provided on the rear side walls of each battery compartment. The power battery box further includes a heat dissipation rear cover fixedly installed on the rear side wall of the box body and communicating with each ventilation opening.

[0014] In an alternative embodiment, a plurality of air inlets are provided on both the left side wall and the right side wall of the heat dissipation rear cover. A heat dissipation fan is fixedly installed on the bottom wall of the heat dissipation rear cover. A temperature sensor is installed on the inner top wall of the heat dissipation rear cover, and an execution controller is installed on the outer side wall of the heat dissipation rear cover. Both the temperature sensor and the heat dissipation fan are connected to the execution controller. The execution controller can receive the temperature information transmitted by the temperature sensor and turn on or off the heat dissipation fan according to the temperature information.

[0015] Specifically, in the present invention, the above "and / or" means that the technical features before "and / or" and the technical features after "and / or" are set simultaneously or selectively.

[0016] The embodiments of the present invention can at least achieve the following beneficial effects: The power battery box provided by the embodiments of the present invention realizes flexible switching between the moving state and the fixed state through the configured support leg and the support and walking mechanism of the lifting type caster mechanism. Specifically, the lifting type caster mechanism can control the lifting of the casters through the driving transmission component, so that the casters can freely switch between the first position (the bottom surface height of the casters is not lower than the bottom surface height of the support legs) and the second position (the bottom surface height of the casters is lower than the bottom surface height of the support legs). This design has the following significant advantages compared with the prior art: (1)High efficiency and flexibility during movement: When it is necessary to move the power battery box, lower the casters to the second position. Utilize the flexibility and load-bearing capacity of the casters to conveniently and quickly move the power battery box to the target position; (2)Stability and safety during fixation: When the power battery box is moved to the designated position and needs to be fixed, raise the casters to the first position, and let the support legs touch the ground for support. Since the support legs usually have good stability and load-bearing capacity, they can ensure the stability and safety of the power battery box during use.

[0017] The power battery box provided by the embodiment of the present invention takes into account both the smoothness during movement and the firmness of support during fixation. This design of dual-mode switching improves the adaptability of the power battery box in different application scenarios. At the same time, it also takes into account the operational convenience when switching between the moving and fixed states, and is particularly suitable for scenarios that require mobile deployment such as temporary energy storage sites or operations in remote areas.

[0018] For other beneficial effects that the power battery box provided by the embodiment of the present invention can achieve, reference can be made to the detailed description in the specific implementation part of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation manners of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific implementation manners or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Is an axonometric schematic diagram of the overall structure of the power battery box provided by the embodiment of the present invention in the state where the box door is closed; Figure 2 Is a partial structure schematic of the power battery box provided by the embodiment of the present invention Figure 1 ; Figure 3 Is an overall structure schematic diagram of the support and walking mechanism in the power battery box provided by the embodiment of the present invention; Figure 4 Is a partial structure schematic of the power battery box provided by the embodiment of the present invention Figure 2 ; Figure 5 Is an axonometric schematic diagram of the overall structure of the power battery box provided by the embodiment of the present invention in the state where the box door is open; Figure 6 Is Figure 5 A partial enlarged view of the setting method of the limiting structure in Figure 7 Is a partial structure schematic of the power battery box provided by the embodiment of the present inventionFigure 3 ; Figure 8 Isometric schematic of the overall structure of the heat dissipation rear cover in the power battery box provided by the embodiment of the present invention Figure 1 ; Figure 9 Isometric schematic of the overall structure of the heat dissipation rear cover in the power battery box provided by the embodiment of the present invention Figure 2 .

[0021] Icons: 1 - box body; 101 - plug-in track; 1010 - plug-in interface; 2 - support walking mechanism; 21 - support leg; 22 - lifting wheel mechanism; 3 - drive transmission component; 31 - bidirectional screw; 32 - drive motor; 33 - drive controller; 34 - first transmission wheel; 35 - second transmission wheel; 4 - walking bracket; 41 - movable carrier; 42 - movable cross frame; 421 - connecting groove; 422 - rotating shaft; 43 - hinged rod; 5 - wheel; 6 - wheel smoothness maintaining mechanism; 61 - dust collection box; 611 - control panel; 62 - suction fan; 63 - suction channel; 7 - battery pack insulation isolation frame; 70 - battery compartment; 71 - contact connection terminal; 72 - limiting structure; 721 - limiting housing; 7210 - guiding hole; 722 - locking plate; 7221 - handle; 8 - battery pack controller; 81 - charge and discharge plug; 9 - box door; 91 - box door handle; 92 - high voltage warning sign; 10 - battery cell; 11 - heat dissipation rear cover; 111 - air inlet; 12 - heat dissipation fan; 121 - mesh plate; 13 - temperature sensor; 14 - execution controller. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] It should be noted that: similar reference numerals and letters denote similar items in the drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0026] In addition, the terms "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0029] This embodiment provides a power battery box. Referring to Figures 1 to 3 , the power battery box includes a box body 1 and a support walking mechanism 2. As Figures 1 to 3As shown in the figure, the supporting walking mechanism 2 is installed at the bottom of the box body 1, and specifically includes supporting legs 21 and a lifting wheel mechanism 22. The lifting wheel mechanism 22 includes a driving transmission component 3, a walking bracket 4, and wheels 5 installed at the bottom of the walking bracket 4; the driving transmission component 3 is fixed to the bottom wall of the box body 1 and is connected to the walking bracket 4, and is used to drive the walking bracket 4 to lift relative to the box body 1 so that the wheels 5 rise to the first position or descend to the second position. When the wheels 5 are in the first position, the bottom surface height of the wheels 5 is not lower than the bottom surface height of the supporting legs 21. When the wheels 5 are in the second position, the bottom surface height of the wheels 5 is lower than the bottom surface height of the supporting legs 21. Among them, the wheels 5 can be a directional wheel structure with a determined direction or a universal wheel structure without a determined direction. For the convenience of the operator to move, a universal wheel structure is preferably used. The number of the supporting legs 21 and the number of the wheels 5 are designed according to the specific layout angle. Preferably, as shown in Figures 1 to 3 the figure, four are designed respectively, and two, three or more can also be designed respectively, with the design element of being able to stably carry the box body 1; the number of the supporting legs 21 and the number of the wheels 5 can be the same or different.

[0030] The power battery box provided in this embodiment realizes the flexible switching between the moving and fixed states of the power battery box by configuring the supporting walking mechanism 2 including the supporting legs 21 and the lifting wheel mechanism 22. Specifically, the lifting wheel mechanism 22 can control the lifting of the wheels 5 through the driving transmission component 3, so that the wheels 5 can freely switch between the first position (the bottom surface height of the wheels 5 is not lower than the bottom surface height of the supporting legs 21) and the second position (the bottom surface height of the wheels 5 is lower than the bottom surface height of the supporting legs 21). This design has the following significant advantages compared with the prior art: (1) High efficiency and flexibility during movement: When it is necessary to move the power battery box, lower the wheels 5 to the second position, and use the flexibility and load-bearing capacity of the wheels 5 to conveniently and quickly move the power battery box to the target position; (2) Stability and safety during fixation: When the power battery box is moved to the designated position and needs to be fixed, raise the wheels 5 to the first position, and the supporting legs 21 land for support. Since the supporting legs 21 usually have good stability and load-bearing capacity, it can ensure the stability and safety of the power battery box during use.

[0031] The power battery box provided in this embodiment takes into account the smoothness during movement and the support stability during fixation. This design of dual-mode switching improves the adaptability of the power battery box in different application scenarios. At the same time, it also takes into account the operation convenience when switching between the moving and fixed states, and is especially suitable for scenarios that require mobile deployment such as temporary energy storage sites or operations in remote areas.

[0032] In this embodiment, there are various design options for the walking bracket 4 and the drive transmission assembly 3, including but not limited to directly controlling the lifting of the walking bracket 4 by using a longitudinal telescopic mechanism (such as an electric push rod assembly, a cylinder piston rod assembly, a hydraulic cylinder piston rod assembly, etc.). However, this type of structure requires a relatively large vertical distance between the bottom surface of the battery box body 1 and the ground for the installation of the telescopic mechanism, which is suitable for a relatively large installation space and is not applicable in some installation environments with limited space.

[0033] For this, continue to refer to Figures 1 to 3 and, with emphasis on referring to Figure 3 In an alternative embodiment of this embodiment, the above-mentioned walking bracket 4 specifically includes a movable carrier 41, two movable crossbars 42, and two groups of hinge rods 43; the wheel carrier of the walking wheel 5 is fixedly installed on the bottom surface or side surface (preferably the bottom surface) of the movable carrier 41. The movable carrier 41 has a first direction and a second direction that are perpendicular to each other in the horizontal plane, where: the two movable crossbars 42 both extend along the second direction and are arranged at intervals along the first direction above the movable carrier 41. Along the first direction, the two groups of hinge rods 43 are arranged at opposite ends of the movable carrier 41, and one end of each group of hinge rods 43 is hinged to the corresponding end of the movable carrier 41, and the other end is hinged to a movable crossbar 42 close to the corresponding hinge rod 43. The drive transmission assembly 3 specifically includes a bidirectional screw 31 and a drive motor 32; the bidirectional screw 31 extends along the first direction and its two ends are rotatably installed on the bottom wall of the box body 1; the two movable crossbars 42 are respectively threadedly sleeved on the outer parts of two threaded rod segments with opposite helix directions of the bidirectional screw 31. The drive motor 32 is fixed on the bottom wall of the box body 1 and its output shaft is connected to one end of the bidirectional screw 31 for driving the bidirectional screw 31 to rotate. When the bidirectional screw 31 rotates, the two groups of movable crossbars 42 will move relatively or away from each other, thereby driving the two groups of hinge rods 43 to rotate, and then driving the movable carrier 41 to lift or lower relative to the box body 1 so that the walking wheel 5 rises to the first position or descends to the second position.

[0034] In this alternative embodiment, the movable carrier 41 can be a solid plate structure or a frame structure. The driving transmission assembly 3 can also include a drive controller 33 connected to the drive motor 32. The housing of the drive controller 33 can be fixedly installed on the bottom surface of the box body 1 for starting, stopping, and steering control of the drive motor 32. Alternatively, a control chip can be directly integrated inside the drive motor 32, and an external controller can control the operation of the drive motor 32. This alternative embodiment does not require additional vertical space to install the longitudinal telescopic mechanism. The walking bracket 4 and the driving transmission assembly 3 only occupy a small vertical space, reducing the requirement for the vertical distance of the installation space. Moreover, by using the drive motor 32 and the bidirectional screw 31, the driving transmission assembly 3 can precisely control the relative or opposite movement of the two groups of movable crossbars 42, thereby driving the articulated rod 43 to rotate and realizing the lifting of the movable carrier 41. This mechanism ensures that the road wheels 5 can accurately switch between the first position (raised) and the second position (lowered), and the drive motor 32 can also position the road wheels 5 at different heights according to the actual ground conditions to meet the requirements of different working scenarios.

[0035] In this alternative embodiment, further optionally, the driving transmission assembly 3 includes two bidirectional screws 31 arranged at intervals along the second direction. The output shaft of the drive motor 32 is connected to the end of one of the bidirectional screws 31. The driving transmission assembly 3 also includes a first transmission wheel 34 and a second transmission wheel 35. The first transmission wheel 34 and the second transmission wheel 35 are respectively fixedly sleeved on the outside of one end of the two groups of bidirectional screws 31, and the first transmission wheel 34 and the second transmission wheel 35 are connected by a transmission belt or a transmission chain. Each group of movable crossbars 42 is simultaneously threadedly sleeved on the two bidirectional screws 31. In this alternative embodiment, by arranging two bidirectional screws 31 at intervals along the second direction and using the cooperation of the first transmission wheel 34 and the second transmission wheel 35 with the transmission belt or the transmission chain, the synchronous transmission of power between the two bidirectional screws 31 is realized. This design avoids the problems of uneven load or vibration that may occur in a single screw, thereby significantly improving the smoothness of the transmission process.

[0036] Optionally, each group of articulated rods 43 respectively includes a first articulated rod and a second articulated rod arranged at intervals along the second direction of the movable carrier 41. In this alternative embodiment, the design of the double articulated rods can better disperse the load, reduce the stress concentration at a single articulated point, thereby improving the stability and durability of the overall structure. At the same time, by sharing the load by the two articulated rods 43 together, the load-bearing capacity of the movable carrier 41 is increased.

[0037] Optionally, a connecting groove 421 is provided on the movable cross-frame 42. A rotating shaft 422 is fixed in the connecting groove 421. One end of the hinge rod 43 is inserted into the connecting groove 421 and rotatably sleeved outside the rotating shaft 422. The connecting groove 421 is provided on the bottom surface of the movable cross-frame 42, and preferably penetrates through the opposite side surfaces of the movable cross-frame 42 in the first direction to provide a larger movement space for the hinge rod 43. In this optional embodiment, one end of the hinge rod 43 is inserted into the connecting groove 421 and rotatably sleeved outside the rotating shaft 422, allowing the hinge rod 43 to freely rotate in the connecting groove 421. This design enables the hinge rod 43 to flexibly adapt to different angle changes, and this layout can further reduce the required longitudinal installation space of the walking bracket 4.

[0038] Optionally, the driving motor 32 is fixedly installed on the side wall of the support leg 21. An installation hole is provided on the support leg 21, and the end of the bidirectional screw 31 is rotatably installed inside the installation hole. In this optional embodiment, by fixedly installing the driving motor 32 on the side wall of the support leg 21, the space of the existing structure is fully utilized, reducing additional installation brackets or supports, and making the overall structure more compact; by directly providing an installation hole on the support leg 21 and rotatably installing the end of the bidirectional screw 31 inside the installation hole, the use of intermediate connectors is reduced, and the risk of failure caused by loosening or failure of the connectors is reduced, improving the stability and reliability of the system. In addition, by fixedly installing the driving motor 32 on the side wall of the support leg 21 and providing an installation hole on the support leg 21 to rotatably install the end of the bidirectional screw 31, the support walking mechanism 2 is an integrated overall structure of the support leg 21 and the lifting wheel mechanism 22, which is convenient for disassembly, installation and maintenance.

[0039] In addition, during the actual application process, impurities such as lint balls are likely to adhere to the rolling wheels 5, forming damping on the wheel surfaces of the rolling wheels 5 and affecting the high-efficiency smoothness during the movement. Moreover, the space at the bottom of the box body 1 is narrow, making it difficult to effectively clean the rolling wheels 5. In view of this, in an alternative embodiment of the present embodiment, a rolling wheel smoothness maintaining mechanism 6 is further provided. The rolling wheel smoothness maintaining mechanism 6 includes a dust collection box 61, a control panel 611, a suction fan 62, and a suction channel 63. The dust collection box 61 and the suction fan 62 are both fixed on the side wall of the box body 1. One end of the suction channel 63 is connected to the air inlet 111 of the suction fan 62, and the other end of the suction channel 63 extends to the bottom of the box body 1 and is provided with a suction port facing the bottom surface of the box body 1. The air outlet of the suction fan 62 communicates with the inside of the dust collection box 61; the control panel 611 is disposed on the surface of the dust collection box 61 and is connected to the suction fan 62 for controlling the start or stop of the suction fan 62. In this alternative embodiment, the suction port of the suction channel 63 extends to the bottom of the box body 1 and faces the bottom surface of the box body 1. When the rolling wheels 5 are in the first position (ascending), the rolling wheels 5 are closer to the suction port of the suction channel 63. At this time, the suction fan 62 can be started to adsorb impurities such as lint balls adhering to the rolling wheels 5 into the inside of the dust collection box 61, avoiding the formation of damping on the wheel surfaces by the impurities, thereby ensuring the high-efficiency smoothness of the rolling wheels 5 during the movement and improving the operation efficiency of the device; the dust collection box 61 is provided with a cleaning port and a cover plate covering the cleaning port for uniformly cleaning the impurities inside the dust collection box 61. This embodiment can realize the automatic cleaning function of the rolling wheels 5, reduce the complexity of cleaning the rolling wheels 5, ensure the smoothness of the rolling wheels 5 during rolling, and improve the high-efficiency smoothness during the movement of the power battery box.

[0040] In addition, in the prior art, most power battery boxes adopt an integral installation structure in which the battery modules are fixed in the box body 1, and neither the battery modules nor the battery cells 10 can be individually withdrawn or replaced. When a certain battery module or battery cell 10 fails or needs maintenance, it is often necessary to cut off the power supply of the entire battery box and stop the machine for maintenance, which may cause the risk of service interruption to key facilities such as medical equipment and data centers with high requirements for uninterrupted power supply.

[0041] In response to this, with reference to Figures 4 to 6, in an alternative embodiment of the present embodiment, a battery pack insulation isolation frame 7 is fixedly installed inside the box body 1; the battery pack insulation isolation frame 7 is provided with a plurality of battery compartments 70 and a plurality of groups of limiting structures 72 corresponding to each battery compartment 70 one by one; the openings of the plurality of battery compartments 70 all face the same side wall of the box body 1, and contact connection terminals 71 are fixedly installed on the inner walls of each battery compartment 70. The limiting structure 72 is used to fix the battery cell 10 in the corresponding battery compartment 70 when the battery cell 10 is fixed in the battery compartment 70, so that the contact connection terminal 71 remains in contact with the electrode end of the battery cell 10. A battery pack controller 8 is provided on the outer side wall of the box body 1, and the contact connection terminals 71 in the plurality of battery compartments 70 are all electrically connected to the battery pack controller 8. The battery pack controller 8 can control the circuit connection relationship (series or parallel) between the plurality of battery compartments 70; a charging and discharging plug 81 is fixedly connected to the battery pack controller 8, and a battery management system is provided inside the battery pack controller 8, which is responsible for monitoring and managing the charging and discharging process of the battery module formed by connecting each battery cell 10. The charging and discharging operation of the battery cells 10 inside the box body 1 is realized through the charging and discharging plug 81, ensuring the safe and efficient operation of the battery module.

[0042] In this alternative embodiment, the battery cells 10 can be inserted into each battery compartment 70 respectively, and the inserted battery cells 10 are connected to form a battery module. Since each battery cell 10 can be independently installed and disassembled, the position of the battery cell 10 can be adjusted according to actual needs to adjust the power distribution method and energy storage situation. When a fault occurs, the corresponding battery cell 10 can also be taken out separately for maintenance or replacement, which is more convenient for equipment maintenance.

[0043] Continue to refer to Figures 4 to 6, in some alternative embodiments of the present embodiment, the above-mentioned limiting structure 72 specifically includes a limiting housing 721 and a locking plate 722; with the orientation of the opening of the battery compartment 70 being the front side of the box body 1, the limiting housing 721 is provided at the corresponding positions on the front side of the battery pack insulation isolation frame 7 corresponding to the openings of each battery compartment 70. The limiting housing 721 is a U-shaped member protruding towards the front side of the box body 1 and penetrating up and down, and a guiding hole 7210 extending in the vertical direction is provided on the front side wall of the limiting housing 721. The locking plate 722 is vertically inserted into the interior of the limiting housing 721, and a handle 7221 is fixed to the front side of the locking plate 722, and the handle 7221 passes through the guiding hole 7210; in the free state, the locking plate 722 extends downward out of the limiting housing 721 and blocks in front of the opening of the corresponding battery compartment 70. Driving the handle 7221 to slide upward along the guiding hole 7210 can drive the locking plate 722 to slide upward relative to the limiting housing 721 to open the opening of the corresponding battery compartment 70. In this alternative embodiment, driving the handle 7221 to slide upward along the guiding hole, driving the locking plate 722 to slide upward relative to the limiting housing 721 to open the opening of the corresponding battery compartment 70, inserting the battery cell 10 into the corresponding battery compartment 70, and releasing the handle 7221 to enable the locking plate 722 to extend downward out of the limiting housing 721 under its own weight and block in front of the opening of the corresponding battery compartment 70 (or driving the handle 7221 to reset). At this time, the locking plate 722 will fit against the front surface of the battery cell 10, lock the battery cell 10 inside the corresponding battery compartment 70 and provide a certain pressing force to the battery cell 10 to ensure that the contact connection terminal 71 in the battery compartment 70 remains in contact with the electrode end of the battery cell 10. Particularly, for the convenience of operation, in this alternative embodiment, the handle 7221 is preferably a T-shaped handle, and the cross bar at its end is limited to the front side of the limiting housing 721.

[0044] Continue to refer to Figures 4 to 6, in some alternative embodiments of this embodiment, with the orientation of the opening of the battery compartment 70 as the front side of the box body 1, the box body 1 includes a box door 9 that covers the openings of multiple battery compartments 70; a plug-in track 101 is fixedly installed on the peripheral wall of the box body 1, and a plug-in port 1010 is provided at the top of the plug-in track 101. The box door 9 is plugged into the inside of the plug-in track 101 from the plug-in port 1010, and a box door handle 91 is provided on the top or outside of the box door 9. After each battery cell 10 is plugged into the corresponding battery compartment 70, the box door 9 is slid downward along the plug-in track 101 through the box door handle 91, so that the box door 9 closes the opening on the front surface of the box body 1 of the power battery box, and further closes the openings of each battery compartment 70 to protect the battery cells 10 arranged inside the box body 1; when the position of the battery cell 10 needs to be adjusted or the battery cell 10 needs to be disassembled, the box door 9 is opened upward along the plug-in track 101 through the box door handle 91 to perform relevant operations. In this alternative embodiment, by closing the opening on the front surface of the box body 1 with the box door 9, external dust, moisture and other impurities can be effectively prevented from entering the battery compartment 70, protecting the battery cells 10 from the influence of environmental factors. At the same time, when the box door 9 slides up and down, it moves in the vertical direction and does not extend to the sides or the front. This design makes the overall box body 1 more compact and suitable for installing the power battery box inside a cabinet or other narrow spaces. Further, a high-voltage warning sign 92 can also be fixedly installed on the front surface of the box door 9 to remind the staff to pay attention to safety.

[0045] Refer to Figures 1 to 9 , with key reference to Figure 7 、 Figure 8 and Figure 9 , in the alternative embodiments of this embodiment, with the orientation of the opening of the battery compartment 70 as the front side of the box body 1, ventilation openings are provided on the rear side walls of each battery compartment 70; the power battery box further includes a heat dissipation rear cover 11 fixedly installed on the rear side wall of the box body 1 and communicated with each ventilation opening.

[0046] In an alternative embodiment of the present embodiment, a plurality of air inlets 111 are provided on the left and right side walls of the rear heat dissipation cover 11. A heat dissipation fan 12 is fixedly installed on the bottom wall of the rear heat dissipation cover 11. A temperature sensor 13 is installed on the inner top wall of the rear heat dissipation cover 11. An execution controller 14 is installed on the outer side wall of the rear heat dissipation cover 11. The temperature sensor 13 and the heat dissipation fan 12 are both connected to the execution controller 14. The execution controller 14 can receive the temperature information transmitted by the temperature sensor 13 and turn on or off the heat dissipation fan 12 according to the temperature information. Among them, the number of the heat dissipation fans 12 is not specifically limited. Preferably, two or more are designed. The gas outlet end of the heat dissipation fan 12 faces the outside of the rear heat dissipation cover 11 to use the heat dissipation fan 12 to take out the hot air in the rear heat dissipation cover 11. The number of the air inlets 111 provided on the left and right side walls of the rear heat dissipation cover 11 is not specifically limited. Preferably, on the left and right side walls of the rear heat dissipation cover 11, a plurality of air inlets 111 are arranged in a matrix along the vertical direction.

[0047] In this alternative embodiment, the temperature sensor 13 continuously monitors the internal temperature of the battery box body 1 of the power battery, and converts the temperature signal into an electrical signal. The temperature sensor 13 transmits the electrical signal to the signal conditioning circuit of the battery management system (BMS) in the execution controller 14. After being amplified, filtered and other processes, it is converted into a signal suitable for the microcontroller to process. The microcontroller in the execution controller 14 compares the read temperature value with a preset temperature threshold. If the temperature value exceeds the set value, the microcontroller will trigger the heat dissipation control logic. The microcontroller generates a control instruction according to the temperature judgment result and sends the instruction to the drive circuit of the heat dissipation fan 12 through the control signal line. After receiving the control instruction, the drive circuit activates the power supply circuit of the heat dissipation fan 12 to make the heat dissipation fan 12 start to work. Thus, the external air enters the rear heat dissipation cover 11 through the air inlets 111 on the left and right side walls of the rear heat dissipation cover 11, and is then taken out by the heat dissipation fan 12 from the bottom wall of the rear heat dissipation cover 11. The heat dissipation of the battery cells 10 in the box body 1 is realized through the flow of air. The bottom wall of the rear heat dissipation cover 11 can be made of a mesh plate 121 provided with heat dissipation mesh holes to further improve the gas flow rate and thus improve the heat dissipation capacity.

[0048] Finally, it should be noted that: the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other; the above embodiments in this specification are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power battery box, characterized in that, The power battery box includes: a box body (1); a supporting traveling mechanism (2) installed at the bottom of the box body (1), including supporting legs (21) and a lifting traveling wheel mechanism (22), and the lifting traveling wheel mechanism (22) includes a driving transmission assembly (3), a traveling bracket (4), and traveling wheels (5) installed at the bottom of the traveling bracket (4); the driving transmission assembly (3) is fixed to the bottom wall of the box body (1) and connected to the traveling bracket (4), and is used to drive the traveling bracket (4) to lift relative to the box body (1) so that the traveling wheels (5) rise to a first position or descend to a second position. When the traveling wheels (5) are in the first position, the bottom surface height of the traveling wheels (5) is not lower than the bottom surface height of the supporting legs (21). When the traveling wheels (5) are in the second position, the bottom surface height of the traveling wheels (5) is lower than the bottom surface height of the supporting legs (21).

2. The power battery box according to claim 1, wherein the traveling bracket (4) includes a movable bearing frame (41), two movable cross frames (42), and two groups of hinge rods (43); the wheel frame of the traveling wheels (5) is fixedly installed on the movable bearing frame (41), and the movable bearing frame (41) has a first direction and a second direction perpendicular to each other in a horizontal plane, wherein: the two movable cross frames (42) both extend along the second direction and are arranged at intervals along the first direction above the movable bearing frame (41); along the first direction, the two groups of hinge rods (43) are arranged at opposite ends of the movable bearing frame (41), and one end of each group of hinge rods (43) is hinged to the corresponding end of the movable bearing frame (41), and the other end is hinged to one of the movable cross frames (42) close to the corresponding hinge rod (43); the driving transmission assembly (3) includes a bidirectional screw (31) and a driving motor (32); the bidirectional screw (31) extends along the first direction and its two ends are rotatably installed on the bottom wall of the box body (1); the two movable cross frames (42) are respectively threadedly sleeved on the outer parts of two threaded rod segments with opposite rotation directions of the bidirectional screw (31); the driving motor (32) is fixed to the bottom wall of the box body (1) and its output shaft is connected to one end of the bidirectional screw (31), and is used to drive the bidirectional screw (31) to rotate, so that the two movable cross frames (42) move relative to or away from each other, thereby driving the two groups of hinge rods (43) to rotate, and further driving the movable bearing frame (41) to lift relative to the box body (1) so that the traveling wheels (5) rise to the first position or descend to the second position.

3. The power battery box according to claim 2, characterized in that The driving and transmission assembly (3) includes two bidirectional screws (31) arranged at intervals along the second direction, and the output shaft of the driving motor (32) is connected to the end of one of the bidirectional screws (31); the driving and transmission assembly (3) further includes a first transmission wheel (34) and a second transmission wheel (35), the first transmission wheel (34) and the second transmission wheel (35) are respectively fixedly sleeved on the outer part of one end of two groups of the bidirectional screws (31), and the first transmission wheel (34) and the second transmission wheel (35) are connected by a transmission belt or a transmission chain; each group of the movable cross frames (42) is simultaneously threadedly sleeved on two of the bidirectional screws (31); And / or, each group of the articulated rods (43) respectively includes a first articulated rod and a second articulated rod arranged at intervals along the second direction of the movable bearing frame (41).

4. The power battery box according to claim 2, wherein A connecting groove (421) is provided on the movable cross frame (42), a rotating shaft (422) is fixed in the connecting groove (421), and one end of the articulated rod (43) is inserted into the connecting groove (421) and rotatably sleeved outside the rotating shaft (422).

5. The power battery box according to claim 2, wherein, The driving motor (32) is fixedly installed on the side wall of the support leg (21), an installation hole is provided on the support leg (21), and the end of the bidirectional screw (31) is rotatably installed inside the installation hole.

6. The power battery box according to any one of claims 1-5, characterized in that A battery pack insulation isolation frame (7) is fixedly installed inside the box body (1); The battery pack insulation isolation frame (7) is provided with a plurality of battery compartments (70) and a plurality of groups of limiting structures (72) corresponding to each of the battery compartments (70) one by one; the openings of the plurality of battery compartments (70) all face the same side wall of the box body (1), a contact connection terminal (71) is fixedly installed on the inner wall of each battery compartment (70), and the limiting structure (72) is used for fixing a battery cell (10) in the corresponding battery compartment (70) when the battery cell (10) is fixed in the battery compartment (70), so that the contact connection terminal (71) is in contact with the electrode end of the battery cell (10); A battery pack controller (8) is provided on the outer side wall of the box body (1), the contact connection terminals (71) in the plurality of battery compartments (70) are all electrically connected to the battery pack controller (8), and the battery pack controller (8) can control the electrical connection relationship between the plurality of battery compartments (70); a charging and discharging plug (81) is fixedly connected to the battery pack controller (8).

7. The power battery box according to claim 6, characterized in that The limiting structure (72) includes a limiting housing (721) and a locking plate (722); Taking the front side of the box body (1) as the orientation of the opening of the battery compartment (70), the limiting housing (721) is arranged at a position corresponding to the opening of each battery compartment (70) on the front side surface of the battery pack insulation isolation frame (7), the limiting housing (721) is a U-shaped member protruding towards the front side of the box body (1) and penetrating up and down, and a guiding hole (7210) extending in the vertical direction is provided on the front side wall of the limiting housing (721); The locking plate (722) is vertically inserted into the interior of the limiting housing (721). A handle (7221) is fixed to the front side of the locking plate (722), and the handle (7221) passes through the guiding hole (7210). In the free state, the locking plate (722) extends downward out of the limiting housing (721) and blocks in front of the corresponding battery compartment (70). Driving the handle (7221) to slide upward along the guiding hole (7210) can drive the locking plate (722) to slide upward relative to the limiting housing (721) to open the corresponding battery compartment (70).

8. The power battery box according to claim 6, wherein With the orientation of the opening of the battery compartment (70) as the front side of the box body (1), the box body (1) includes a box door (9) covering the openings of a plurality of battery compartments (70). A plugging track (101) is fixedly installed on the peripheral wall of the box body (1). The top of the plugging track (101) is provided with a plugging port (1010). The box door (9) is plugged into the interior of the plugging track (101) from the plugging port (1010), and a box door handle (91) is provided on the top or the outer side of the box door (9).

9. The power battery box according to claim 6, characterized in that With the orientation of the opening of the battery compartment (70) as the front side of the box body (1), ventilation openings are provided on the rear side walls of the respective battery compartments (70). The power battery box further includes a heat dissipation rear cover (11) fixedly installed on the rear side wall of the box body (1) and communicating with the respective ventilation openings.

10. The power battery box according to claim 9, wherein, A plurality of air inlets (111) are provided on both the left side wall and the right side wall of the heat dissipation rear cover (11). A heat dissipation fan (12) is fixedly installed on the bottom wall of the heat dissipation rear cover (11). A temperature sensor (13) is installed on the inner side wall of the top of the heat dissipation rear cover (11). An execution controller (14) is installed on the outer side wall of the heat dissipation rear cover (11). The temperature sensor (13) and the heat dissipation fan (12) are both connected to the execution controller (14). The execution controller (14) can receive the temperature information transmitted by the temperature sensor (13) and turn on or off the heat dissipation fan (12) according to the temperature information.

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