An extended battery position mechanism, battery replacement device and battery replacement method thereof

Abstract

The application discloses an extended battery position mechanism, a battery replacing device and a battery replacing method thereof. The extended battery position mechanism comprises a base assembly, a plurality of telescopic frame assemblies and a plurality of support frame assemblies. The base frame assembly comprises a plurality of base frames, and the base frames are connected in sequence. A connecting structure for fixing connection is arranged on the base frame assembly, and the base frame has a first battery positioning structure. Each telescopic frame assembly is slidably connected to a corresponding base frame. Each support frame assembly is slidably connected to a corresponding telescopic frame assembly, and the support frame assembly is provided with a second battery positioning structure. The extended battery position mechanism can be installed on the chassis of the battery replacing device, and two or more battery positions are expanded, thereby improving the battery replacing effect. After the plurality of battery positions are expanded, all the battery boxes on the battery delivery vehicle can be stored on the battery replacing device at one time.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy battery swap technology, and particularly relates to an extended battery position mechanism, a battery swap device and a battery swap method thereof. BACKGROUND

[0002] With the development of new energy vehicles, the demand for electric energy of electric vehicles is becoming more and more urgent, and mobile charging and battery swap has become an inevitable trend of development. The existing mobile battery swap vehicle includes a battery swap mechanism and a chassis, the chassis is provided with a battery box in the length direction, and the battery swap mechanism can be translated to different positions along the chassis to take and place batteries. The battery swap mechanism needs to reserve enough space on the chassis to perform the battery swap action, for example, two empty positions need to be reserved to meet the space required for the battery swap mechanism to perform the battery swap action. Therefore, in the prior art, the utilization rate of the chassis is low. Especially when the chassis length of the power supply vehicle and the battery swap vehicle is the same, because two empty positions need to be provided on the battery swap vehicle, the battery boxes on the power supply vehicle cannot be stored on the battery swap vehicle at one time. SUMMARY

[0003] To solve the problems in the prior art, the present application provides an extended battery position mechanism, a battery swap device and a battery swap method thereof, which can expand two or more battery positions, facilitate the storage of more battery boxes, and improve the battery swap effect.

[0004] To achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0005] The first purpose of the present application is to provide an extended battery position mechanism, comprising:

[0006] a base frame assembly, the base frame assembly comprises a plurality of base frames, each base frame is connected in sequence, a connecting structure for fixed connection is arranged on the base frame assembly, and the base frame has a first battery positioning structure;

[0007] a plurality of telescopic frame assemblies, each telescopic frame assembly is slidably connected to the corresponding base frame;

[0008] a plurality of support frame assemblies, each support frame assembly is slidably connected to the corresponding telescopic frame assembly, and the support frame assembly is provided with a second battery positioning structure.

[0009] Optionally, the base frame comprises two first guide rails arranged at intervals, the first battery positioning structure comprises a positioning plate arranged on the first guide rail, and the positioning plate is arranged in extension along the length direction of the first guide rail.

[0010] Optionally, the positioning plate divides the upper surface of the first guide rail into an outer side surface and an inner battery box support surface.

[0011] Optionally, a first cross beam is connected between the two first guide rails, and a battery support seat is connected to the first cross beam, wherein the battery support seat comprises a support plate and a connecting plate, and the support plate and the connecting plate are connected perpendicularly, and the connecting plate is connected to the first cross beam perpendicularly.

[0012] Optionally, the two first guide rails are each provided with a first guide rail groove, the telescopic frame assembly comprises two second guide rails arranged at intervals, the second guide rails are provided with first rollers, and the two second guide rails are connected to the corresponding first guide rail grooves through the first rollers respectively, and the base frame and the telescopic frame assembly are connected through a first telescopic mechanism.

[0013] Optionally, the support frame assembly comprises two third guide rails arranged at intervals, the second guide rails are provided with second guide rail grooves, the third guide rails are provided with second rollers, and the two third guide rails are connected to the corresponding second guide rail grooves through the second rollers respectively, and the telescopic frame assembly and the support frame assembly are connected through a second telescopic mechanism.

[0014] Optionally, the second battery positioning structure comprises a support beam connected to the two third guide rails, and the support beam is provided with a battery box positioning pin.

[0015] Optionally, the second guide rails and the third guide rails are each provided with a limiting sliding block.

[0016] The second purpose of the present application is to provide a battery replacement device, which comprises a chassis, a battery replacement mechanism and the above-mentioned extended battery position mechanism, the chassis is provided with a plurality of mounting positions along the length direction, part of the mounting positions are provided with battery seats, part of adjacent mounting positions are provided with the extended battery position mechanism, and each base frame of the extended battery position mechanism is fixed to the corresponding mounting position, the telescopic frame assembly and the support frame assembly can extend out of the first length side of the chassis along the width direction of the chassis, and the battery replacement mechanism is slidably connected to the chassis and can translate along the length direction of the chassis.

[0017] Optionally, the battery replacement mechanism comprises a trolley frame and a telescopic arm assembly connected to the trolley frame, the telescopic arm assembly is connected with a lifting device, and the telescopic arm assembly can extend out along the width direction of the chassis.

[0018] The battery replacement device further comprises a longitudinal guide device, the longitudinal guide device comprises first and second tracks arranged in parallel, the first track is arranged on the second length side of the chassis, the second track is arranged higher than the chassis, and the trolley frame is movably connected to the first and second tracks respectively.

[0019] The third object of the present application is to provide a battery replacement method of the battery replacement device, each of the support frame assemblies extends from the chassis, each of the support frame assemblies is loaded with a battery box, each of the base frames is empty, each of the battery bases on the chassis is loaded with a battery box, and the battery replacement method comprises the following steps:

[0020] Step S1, parking the battery replacement vehicle on one side of the second length side of the chassis;

[0021] Step S2, the battery replacement mechanism operates to exchange the battery box on the support frame assembly and the battery box on the battery replacement vehicle;

[0022] Step S3, the battery replacement mechanism exchanges the battery boxes on the chassis one by one and the battery boxes on the battery replacement vehicle.

[0023] Optionally, among the positions of the base frames installed on the chassis, two adjacent positions are a transfer position and a temporary storage position, and the battery replacement mechanism travels to the transfer position;

[0024] In step S1, the battery replacement vehicle is parked on one side of the second length side of the chassis, so that the battery box thereof is aligned with the transfer position;

[0025] In step S2, the following steps are included:

[0026] Step S21, the battery replacement mechanism grabs the battery box of the battery replacement vehicle and puts it into the temporary storage position;

[0027] Step S22, the support frame assembly corresponding to the transfer position is retracted to move the corresponding battery box to the transfer position;

[0028] Step S23, the battery replacement mechanism grabs the battery box on the support frame assembly and loads it into the battery replacement vehicle;

[0029] Step S24, the battery replacement mechanism grabs the battery box of the battery replacement vehicle and puts it into the transfer position;

[0030] Step S25, the support frame assembly drives the battery box of the battery replacement vehicle to extend from the chassis;

[0031] Step S26, determining whether all the battery boxes on the support frame assemblies are exchanged, if the result is yes, entering step S3, otherwise entering step S27;

[0032] Step S27, resetting the transfer position and the temporary storage position;

[0033] Step S28, the battery replacement mechanism travels to the transfer position;

[0034] Step S29, re-entering step S21.

[0035] By adopting the above technical solution, the present application has the following beneficial effects:

[0036] The extended battery position mechanism of the present application can be installed on the chassis of the battery replacement device, expanding two or more battery positions, facilitating the storage of more battery boxes, and improving the battery replacement effect. After expanding multiple battery positions, all battery boxes on the battery delivery vehicle can be stored on the battery replacement device at one time. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and other objects, features and advantages of the disclosed example embodiments will become more apparent from the following detailed description, read in conjunction with the accompanying drawings. In the drawings, several embodiments of the disclosure are illustrated by way of example and not limitation in which like reference numerals

[0038] Figure 1 is a perspective structural schematic diagram of a battery replacement station provided by an embodiment of the present application;

[0039] Figure 2 is a structural schematic diagram of an extended battery position mechanism provided by an embodiment of the present application;

[0040] Figure 3 is a structural schematic diagram of a base frame part of the extended battery position mechanism provided by an embodiment of the present application;

[0041] Figure 4 is a structural schematic diagram of a telescopic frame assembly of the extended battery position mechanism provided by an embodiment of the present application;

[0042] Figure 5 is a structural schematic diagram of a support frame assembly of the extended battery position mechanism provided by an embodiment of the present application;

[0043] Figure 6 is a battery replacement step diagram of the battery replacement station provided by an embodiment of the present application.

[0044] In the drawings, 1 is an extended battery position mechanism; 10 is a connecting structure; 11 is a base frame; 111 is a first guide rail; 112 is a positioning plate; 113 is a first cross beam; 114 is a battery support seat; 12 is a first telescopic mechanism; 13 is a telescopic frame assembly; 131 is a second guide rail; 132 is a first roller; 133 is a limiting sliding block; 134 is a second cross beam; 135 is a third cross beam; 14 is a support frame assembly; 141 is a third guide rail; 142 is a second roller; 143 is a support beam; 144 is a battery box positioning pin; 145 is a limiting sliding block; 146 is a fourth cross beam; 15 is a second telescopic mechanism; 2 is a battery replacement mechanism; 3 is a chassis; 4 is a towing head; 5 is an outer cover; 51 is an outer cover right door; 52 is an outer cover left door; 6 is a lifting device; 7 is a towing head; 8 is a battery box. DETAILED DESCRIPTION

[0045] With reference to the drawings, the technical solutions in the embodiments of the present disclosure will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present disclosure.

[0046] The specific implementation of the present disclosure will be described in detail below with reference to the drawings.

[0047] Embodiment one

[0048] Referring to Figures 1 to 5 As shown in the drawings, the embodiment of the present application provides an extended battery position mechanism 1, which comprises a base frame assembly, a plurality of telescopic frame assemblies 13 and a plurality of support frame assemblies 14. The base frame assembly comprises a plurality of base frames 11, each of which is connected in sequence, and each base frame 11 can be provided separately or integrally (as a whole). The base frame assembly is provided with a connecting structure 10 for connection and fixation, which is used to be connected to the chassis 3 of the battery replacement equipment. The base frame 11 has a first battery positioning structure. Each telescopic frame assembly 13 is slidably connected to the corresponding base frame 11. Each support frame assembly 14 is slidably connected to the corresponding telescopic frame assembly 13, and the support frame assembly 14 is provided with a second battery positioning structure. When the support frame assembly 14 extends out of the base frame assembly, the support frame assembly 14 can independently support the battery box and position the battery box through the second battery positioning structure. The base frame assembly can also place the battery box separately, and can limit the position of the battery box 8 through the first battery positioning structure. When the support frame assembly 14 is in the retracted state, the position is higher than the base frame assembly, and the battery box can also be supported on the support frame assembly 14, and the second battery positioning structure on the support frame assembly can limit the position of the battery box. The base frame assembly comprises at least two base frames 11, so as to provide the space required for the transfer of the battery box.

[0049] The extended battery position mechanism 1 of the present application can be installed on the chassis 3 of the battery replacement equipment, expanding two or more battery positions, facilitating the storage of more battery boxes 8, and improving the battery replacement effect. After expanding multiple battery positions, all battery boxes 8 on the battery delivery vehicle can be stored on the battery replacement equipment at one time.

[0050] Exemplarily, the chassis 3 of the battery swap station can have the same length as the chassis of the battery delivery vehicle, and the extended battery position mechanism 1 installed on the battery swap station has two base frames 11 and two support frame assemblies 14. In this way, the number of battery boxes 8 that can be loaded on the battery swap station is the same as the loading capacity of the battery delivery vehicle, and the full battery boxes 8 (for example, eight battery boxes) of the full battery delivery vehicle can be loaded on the battery swap station at one time (for example, the chassis of the battery swap station has six battery positions, and the two support frame assemblies can also load two battery boxes), which significantly improves the battery swap efficiency.

[0051] Referring to Figure 3 As shown, in a possible implementation, the base frame 11 includes two first guide rails 111 arranged at intervals, and the first battery positioning structure includes a positioning plate 112 arranged on the first guide rail 111, which extends along the length direction of the first guide rail 111. In this way, when the battery box is supported on the first guide rail 111, the positioning plate 112 on the first guide rail 111 limits the side of the battery box, preventing the battery box from tilting.

[0052] Among them, two adjacent base frames 11 can share a first guide rail 111. For example, referring to Figure 3 As shown, when the base frame assembly has only two base frames 11, three first guide rails 111 can be arranged at intervals, and the first guide rail 111 in the middle is shared, thereby simplifying the structure and saving materials. The first guide rail 111 in the middle can have a width greater than that of the first guide rails 111 on both sides, and two positioning plates 112 can be arranged in parallel on the first guide rail 111 in the middle.

[0053] Among them, the positioning plate 112 divides the upper surface of the first guide rail 111 into an outer side and an inner battery box support surface. The inner battery support surface is used to support the edge position of the battery box, and the positioning plate 112 plays a role in positioning the battery box to prevent it from shaking and moving.

[0054] Referring to Figure 3 As shown, in a possible implementation, a first cross beam 113 is connected between the two first guide rails 111, which can be arranged at the end of the first guide rail 111. The first cross beam 113 is connected with a battery support seat 114, which includes a support plate and a connecting plate, and the support plate and the connecting plate are connected vertically, and the connecting plate is connected with the first cross beam 113 vertically. When the battery box is placed on the two first guide rails 111, the support plate can be supported on the bottom of the battery box.

[0055] In a possible implementation, each of the first rails 111 is provided with a first rail groove, the telescopic frame assembly 13 includes two second rails 131 arranged at intervals, the second rails 131 are provided with first rollers 132, and the two second rails 131 are connected to the corresponding first rail grooves through the first rollers 132 respectively. The base frame 11 and the telescopic frame assembly 13 are connected through a first telescopic mechanism 12. The second rails 131 are connected with a second cross beam 134 and a third cross beam 135, and the second cross beam 134 is close to the first cross beam 113.

[0056] The first telescopic mechanism 12 can be a telescopic oil cylinder, one end of the first telescopic mechanism 12 is connected to the first cross beam 113, and the other end of the first telescopic mechanism 12 is connected to the third cross beam 135.

[0057] The support frame assembly 14 includes two third rails 141 arranged at intervals, the second rails 131 are provided with second rail grooves, the third rails 141 are provided with second rollers 142, and the two third rails 141 are connected to the corresponding second rail grooves through the second rollers 142 respectively. The telescopic frame assembly 13 and the support frame assembly 14 are connected through a second telescopic mechanism 15.

[0058] Specifically, the second telescopic mechanism 15 can be a telescopic oil cylinder, one end of the second telescopic mechanism 15 is connected to the third cross beam 135, and the other end of the second telescopic mechanism 15 is connected to the fourth cross beam 146.

[0059] The second battery positioning structure includes a support beam 143 connecting the two third rails 141, and the support beam 143 is provided with battery box positioning pins 144. When the battery box is supported on the support frame assembly 14, each battery box positioning pin 144 is inserted into the corresponding part of the battery box to limit the position of the battery box and prevent the battery box from shaking and moving. Wherein, two support beams 143 can be arranged at intervals, and one battery box positioning pin 144 is arranged on each side of the two support beams 143.

[0060] The second rail 131 and the third rail 141 are both provided with a limiting slide block. The limiting slide block can translate along the rail groove and is not easy to fall off in the rail groove. A slide block seat can be arranged on the second rail 131 and the third rail 141, and the limiting slide block is installed on the slide block seat. The height position of the slide block on the slide block seat can be adjusted, so that the thickness of the limiting slide block is controllable.

[0061] Embodiment two

[0062] Reference Figures 1 to 5As shown, the second embodiment of the present application provides a battery replacement device, which comprises a chassis 3, a battery replacement mechanism 2 and the above-mentioned extended battery position mechanism 1. The chassis 3 is provided with a plurality of mounting positions along the length direction, and some of the mounting positions are provided with battery seats. Each battery seat is a battery position and can place a battery box. Some adjacent mounting positions are provided with the extended battery position mechanism 1, and each base frame 11 of the extended battery position mechanism 1 is fixed on the corresponding mounting position. The telescopic frame assembly 13 and the support frame assembly 14 can extend out of the first length side of the chassis 3 along the width direction of the chassis 3. The battery replacement mechanism 2 is slidably connected to the chassis 3 and can translate along the length direction of the chassis 3.

[0063] Optionally, the battery replacement mechanism 2 comprises a trolley frame and a telescopic arm assembly connected to the trolley frame. A lifting device is connected to the telescopic arm assembly. The telescopic arm assembly can extend or retract along the width direction of the chassis 3, and the battery box can be grabbed or released by the lifting device.

[0064] The battery replacement device further comprises a longitudinal guide device, which comprises a first track and a second track arranged in parallel. The first track is arranged on the second length side of the chassis 3, and the second track is arranged higher than the chassis 3. The trolley frame is movably connected to the first track and the second track, respectively.

[0065] The battery replacement mechanism 2 has been patented, and no further description is given in this case.

[0066] The battery replacement station further comprises an outer cover 5, which can be connected to the chassis 3 and covers each battery box and the battery replacement mechanism 2 on the chassis 3. The outer cover 5 can comprise an outer cover right door 51 and an outer cover left door 52. The chassis 3 is provided with a chassis lifting device 6 at the bottom. The chassis 3 can be connected to a towing vehicle head 7, which can drive the chassis 3 to move to different areas. After the mobile battery replacement station stops at the parking area, the chassis lifting device 6 is first lifted to level the vehicle chassis 3, and then the outer cover right door 51 and the outer cover left door 52 are opened to 90°. The two opened doors can play the role of sunshade and rain protection, and further play the role of unhindered extension of the battery replacement mechanism 2 left and right.

[0067] Thus, the battery replacement steps of the battery replacement station include:

[0068] Step A1, the battery replacement station stops at a suitable area, the front and rear lifting devices 6 on the vehicle chassis are extended to support the chassis, and the towing vehicle head 7 is disconnected;

[0069] Step A2, open the outer cover right door 51 and the outer cover left door 52;

[0070] Step A3, loosen the anchoring device of the battery replacement mechanism 2, move the battery replacement mechanism 2 to the transfer position, and open the detector.

[0071] Embodiment Three

[0072] Embodiment Three of the present application provides a battery replacement method of the battery replacement device, each of the support frame assemblies extends out of the chassis 3, each of the support frame assemblies is loaded with a battery box, each of the base frames 11 is empty, each of the battery bases on the chassis 3 is loaded with a battery box, and the battery replacement method comprises the following steps:

[0073] Step S1, the battery replacement vehicle is parked on one side of the second length side of the chassis 3;

[0074] This step S1 can be located after step A3.

[0075] Step S2, the battery replacement mechanism 2 operates to exchange the battery box on the support frame assembly and the battery box on the battery replacement vehicle;

[0076] In this step, the purpose is to transfer the depleted battery box on the battery replacement vehicle to the extended two battery positions. Once the depleted battery box is stored in the extended position, other battery boxes can be sequentially replaced.

[0077] Step S3, the battery replacement mechanism 2 exchanges the battery boxes on the chassis 3 one by one with the battery boxes on the battery replacement vehicle.

[0078] Optionally, among the positions where each of the base frames 11 on the chassis 3 is installed, two adjacent positions are a transfer position and a temporary storage position, and the battery replacement mechanism 2 travels to the transfer position.

[0079] Referring to Figure 6 shown, in step S1, the battery replacement vehicle is parked on one side of the second length side of the chassis 3, so that its battery box is aligned with the transfer position;

[0080] In step S2, the following steps are included:

[0081] Step S21, referring to Tables 1 and 2, the battery replacement mechanism 2 grabs the battery box of the battery replacement vehicle and places it in the temporary storage position (position 8);

[0082] Step S22, referring to Table 3, the support frame assembly 14 corresponding to the transfer position (position 7) is retracted, moving the corresponding battery box to the transfer position;

[0083] Step S23, referring to Table 4, the battery replacement mechanism 2 grabs the battery box on the support frame assembly 14 (position 7) and loads it into the battery replacement vehicle;

[0084] Step S24, referring to Table 5, the battery replacement mechanism 2 grabs the battery box of the battery replacement vehicle and places it in the transfer position (position 7);

[0085] Step S25, referring to Table 6, the support frame assembly 14 drives the battery box of the battery replacement vehicle to extend out of the chassis 3;

[0086] Step S26, judging whether all the battery boxes on each support frame assembly are exchanged, if the result is yes, entering step S3, otherwise entering step S27;

[0087] Step S27, resetting the transfer position (No. 8 position) and the temporary storage position (No. 7 position);

[0088] Step S28, the battery replacement mechanism 2 travels to the transfer position;

[0089] Step S29, re-entering step S21.

[0090] The step S3 includes the following steps:

[0091] Step S31, stopping the battery replacement vehicle to be replaced at the side of the chassis 3 of the battery replacement station, so that the target battery box of the battery replacement vehicle to be replaced and the transfer position are aligned.

[0092] Step S32, the battery replacement mechanism 2 extends in the width direction of the chassis 3 to grab the target battery box and store it in the storage position.

[0093] Step S33, the battery replacement mechanism 2 grabs the battery box on the battery position of the chassis 3, translates to the transfer position, and extends in the width direction of the chassis 3 to be loaded on the battery replacement vehicle to be replaced.

[0094] Step S34, the chassis 3 of the battery replacement station resets the transfer position and the storage position, and the battery replacement mechanism 2 travels to the transfer position.

[0095] The transfer position and the storage position can be two adjacent empty positions.

[0096] When the battery replacement vehicle to be replaced still has battery boxes to be replaced, in step S34, the transfer position is set to the position corresponding to the battery box to be replaced, and the storage position is set to the position adjacent to the transfer position.

[0097] After the battery replacement vehicle to be replaced is replaced and leaves the battery replacement station, another battery replacement vehicle to be replaced continues to travel to the side of the battery replacement station, and the battery to be replaced and the new transfer position are aligned.

[0098] In the above description of the present specification, unless otherwise explicitly specified and limited, the terms "fixed", "mounted", "connected" or "linked" and the like should be understood in a broad sense. For example, as to the term "connected", it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise explicitly limited in the present specification, the above-mentioned terms can be understood in the specific meaning in the present application by the person skilled in the art according to the specific circumstances.

[0099] According to the above description of the present specification, those skilled in the art can also understand that the terms used such as "upper", "lower", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not explicitly or implicitly indicated that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the present application.

[0100] In addition, the terms "first" or "second" and the like used in the present specification are terms used to refer to numbers or ordinal numbers only for the purpose of description and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" or "second" can explicitly or implicitly include at least one of the features. In the description of the present specification, the meaning of "plurality" is at least two, for example, two, three or more, and the like, unless otherwise explicitly specifically limited.

[0101] Although the present application has been shown and described with respect to several embodiments thereof, it will be apparent that equivalents, substitutes and modifications will occur to others skilled in the art without departing from the spirit and technical scope of the present application. It should be understood that various alternatives to the embodiments of the present application described herein can be employed in practicing the present application. The appended claims are intended to define the scope of the present application and thus cover any module compositions, equivalents or alternatives within the scope of these claims.

Claims

1. A battery replacement device, characterized by, The utility model relates to a battery swap station, including: A chassis is provided with a plurality of installation sites along the length direction, and part of the installation sites are installed with battery seats; An extended battery site mechanism includes a plurality of seat frame assemblies, a plurality of telescopic frame assemblies and a plurality of support frame assemblies, the seat frame assembly includes a plurality of seat frames, each seat frame is fixed on a plurality of adjacent installation sites of the chassis, the seat frame has a first battery positioning structure, each telescopic frame assembly is slidably connected to the corresponding seat frame, each support frame assembly is slidably connected to the corresponding telescopic frame assembly, and the support frame assembly is provided with a second battery positioning structure; A battery swap mechanism is slidably connected to the chassis and can translate along the length direction of the chassis; Among the installation sites installed by each seat frame on the chassis, two adjacent installation sites are a transfer site and a temporary storage site, the telescopic frame assembly and the support frame assembly can extend the first length side of the chassis in the width direction of the chassis, expand the battery site, so that the seat frame and the support frame form a battery site that can independently support the battery box, one side of the second length side of the chassis is used for parking the battery swap vehicle, and in the battery swap process, the battery swap mechanism moves between the transfer site and the temporary storage site to exchange the low-battery battery box on the battery swap vehicle and the battery box on the two support frame assemblies, so that the battery boxes on the other installation sites on the chassis can be sequentially swapped.

2. The battery replacement device according to claim 1, wherein The seat frame includes two first guide rails arranged at intervals, the first battery positioning structure includes a positioning plate arranged on the first guide rail, and the positioning plate extends along the length direction of the first guide rail.

3. The battery replacement device according to claim 2, wherein The positioning plate divides the upper surface of the first guide rail into an outer side and an inner battery box support surface. 4.The battery replacing device according to claim 2, wherein The first cross beam is connected to the battery support seat, the battery support seat includes a support plate and a connecting plate, the support plate and the connecting plate are connected vertically, and the connecting plate is connected to the first cross beam vertically. 5.The battery replacing device according to claim 2, wherein Both the first guide rails are provided with a first guide rail groove, the telescopic frame assembly includes two second guide rails arranged at intervals, the second guide rail is provided with a first roller, and the two second guide rails are connected to the corresponding first guide rail groove through the first roller.

6. The battery replacement device according to claim 5, wherein The support frame assembly includes two third guide rails arranged at intervals, the second guide rail is provided with a second guide rail groove, the third guide rail is provided with a second roller, and the two third guide rails are connected to the corresponding second guide rail groove through the second roller.

7. The battery replacement device according to claim 6, wherein The second battery positioning structure includes a support beam connected to the two third guide rails, and the support beam is provided with a battery box positioning pin. 8.The battery replacing device according to claim 6, wherein The second guide rail and the third guide rail are both provided with a limiting slider. 9.The battery replacing device according to claim 1, wherein The battery swap mechanism includes a trolley frame and a telescopic arm assembly connected to the trolley frame, the telescopic arm assembly is connected with a lifting appliance, and the telescopic arm assembly can extend in the width direction of the chassis. The battery replacing device further comprises longitudinal guiding devices, which comprise first and second tracks arranged in parallel, the first track is arranged on the second length side of the base plate, and the second track is arranged higher than the base plate, and the bogie frame is movably connected to the first and second tracks respectively.

10. The battery replacement method of the battery replacement apparatus according to any one of claims 1 to 9, characterized by, Each of the support frame assemblies extends out of the base plate, each of the support frame assemblies is loaded with a battery box, each of the base frames is empty, each of the battery bases on the base plate is loaded with a battery box, and the battery replacing method comprises the following steps: S1, parking the vehicle to be replaced on one side of the second length side of the base plate; S2, the battery replacing mechanism operates to exchange the battery boxes on the support frame assemblies and the vehicle to be replaced; S3, the battery replacing mechanism exchanges the battery boxes on the base plate and the vehicle to be replaced one by one. 11.The battery replacing method of the battery replacing apparatus according to claim 10, wherein In step S1, the vehicle to be replaced is parked on one side of the second length side of the base plate, so that its battery box is aligned with the transfer position; In step S2, the following steps are included: S21, the battery replacing mechanism grabs the battery box of the vehicle to be replaced and places it in the temporary storage position; S22, the support frame assembly corresponding to the transfer position is retracted, and the corresponding battery box is moved to the transfer position; S23, the battery replacing mechanism grabs the battery box on the support frame assembly and loads it into the vehicle to be replaced; S24, the battery replacing mechanism grabs the battery box of the vehicle to be replaced and places it in the transfer position; S25, the support frame assembly drives the battery box of the vehicle to be replaced to extend out of the base plate; S26, it is judged whether the battery boxes on each support frame assembly are all exchanged, if the result is yes, step S3 is entered, otherwise step S27 is entered; S27, the transfer position and the temporary storage position are reset; S28, the battery replacing mechanism travels to the transfer position; S29, step S21 is re-entered.

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