Battery pack carrying device and battery replacement device

Abstract

The application provides a battery pack bearing device and a battery replacement device. The battery pack bearing device is arranged on the battery replacement device to bear the battery pack. The battery pack bearing device comprises a platform base, a tray and an auxiliary support mechanism. The tray is floatingly connected to the platform base and has a first abutting surface for abutting against the battery pack. The auxiliary support mechanism is arranged on the platform base and is spaced apart from the tray. The auxiliary support mechanism has a second abutting surface for abutting against the battery pack. The second abutting surface can float relative to the platform base. The battery pack is prevented from tilting, and the stability of the battery pack bearing device when bearing and replacing the battery pack is improved. In addition, the contact surfaces of the tray and the auxiliary support mechanism and the battery pack adopt a floating structure, which plays a buffering role and reduces the wear of the tray and the auxiliary support mechanism and the damage of the battery pack.

Description

Technical Field

[0001] This invention relates to the field of battery swapping technology, and in particular to a battery pack carrying device and a battery swapping equipment. Background Technology

[0002] Currently, electric vehicles mainly fall into two categories: direct charging and fast battery swapping. Due to limitations in charging time and location, many new energy electric vehicles are gradually adopting a fast battery pack swapping method for energy replenishment. Because of the weight limitations of the battery pack, it cannot be disassembled and replaced manually, thus requiring a battery swapping device to replace the electric vehicle's battery pack.

[0003] Currently, quick-swap technology is most mature for small passenger vehicles. Since passenger vehicle batteries are fixed to the vehicle chassis, battery pack replacement requires specialized swapping equipment to be moved to the underside of the vehicle for battery removal or installation – hence the term "chassis-based battery swapping." Furthermore, due to the relatively small weight of passenger vehicles and the correspondingly small size of their battery packs, battery replacement is extremely convenient.

[0004] However, for large vehicles, such as heavy-duty or light-duty trucks, the large weight of the vehicle body and cargo necessitates a higher capacity battery pack. Sufficiently large electrical capacity is required to power these vehicles for hundreds of kilometers, resulting in larger and heavier battery packs. Therefore, in current technology, large new energy vehicles typically use a top-mounted crane to secure large battery containers to the vehicle's frame. This method poses certain safety risks to the driver and vehicle, and the hoisting equipment requires significant space and has stringent site requirements.

[0005] Therefore, there is an urgent need for a safer, more reliable, and easier-to-use battery swapping model for large vehicles, such as the chassis-based battery swapping model used in passenger cars. However, battery packs with larger capacities are typically larger in size and weight. Existing chassis-based battery swapping equipment, due to the small size of the trays supporting the battery packs, is only suitable for swapping battery packs in small passenger cars. If existing battery swapping equipment is used directly to support the aforementioned larger and heavier battery packs, it will have drawbacks such as poor support capacity, poor battery pack placement stability, and high overall height. It may even fail to replace the battery pack due to limited support capacity. On the other hand, directly increasing the size of the tray will increase the cost, weight, and complexity of the battery swapping equipment. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome at least one defect in the prior art and to provide a battery pack carrying device and a battery swapping device.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] A battery pack carrying device is used to mount on a battery swapping device to carry the battery pack, the battery pack carrying device comprising:

[0009] Platform base;

[0010] The tray is floatingly connected to the platform base and has a first contact surface for abutting against the battery pack;

[0011] An auxiliary support mechanism is disposed on the platform base and spaced apart from the tray. The auxiliary support mechanism has a second abutment surface for abutting against the battery pack, and the second abutment surface is floatable relative to the platform base.

[0012] In this design, auxiliary support mechanisms are spaced around the periphery of the tray to assist in supporting the battery pack. The battery pack is placed on the battery pack support device via a first and second contact surface. This prevents the battery pack from tilting (or even tipping over) even with a small-area tray, improving the stability of the battery pack support device when carrying and replacing the battery pack. Furthermore, the contact surfaces between the tray and auxiliary support mechanisms and the battery pack employ a floating structure, allowing for a closer fit and increasing the contact area between the support device and the battery pack, thus improving the stability of the battery pack placement. The floating structure also acts as a buffer, reducing hard collisions between the elastic tray and the battery pack, and between the auxiliary support mechanisms and the battery pack, thereby reducing wear on the tray and auxiliary support mechanisms and damage to the battery pack. Additionally, if the electric vehicle's chassis has a certain tilt angle, the floating structure ensures a closer fit between the battery pack and the electric vehicle's chassis, improving the reliability of battery swapping. This structure is not only suitable for battery pack replacement in small passenger cars but also for battery pack replacement in medium and large vehicles.

[0013] Preferably, there are multiple auxiliary support mechanisms, which are distributed outside the two opposite sides of the tray.

[0014] In this solution, the above structure is adopted to avoid the battery pack tilting and improve the stability of the battery pack support device when carrying and replacing the battery pack.

[0015] Preferably, at least two auxiliary support mechanisms are provided on each of the two opposite sides of the pallet, arranged at intervals; more preferably, two auxiliary support mechanisms are provided on each of the two opposite sides of the pallet, arranged at intervals.

[0016] Preferably, at least two of the support mechanisms, outside each side of the pallet, are spaced apart along the extension direction of the respective side of the pallet.

[0017] In this solution, the above structure is adopted, which makes the supporting force of the auxiliary support mechanism on the battery pack more uniform, thereby reducing the shaking amplitude of the battery pack during the operation of the battery swapping equipment and improving the stability of the battery pack.

[0018] Preferably, a channel is formed between the two opposite sides of the tray and the auxiliary support mechanism outside the corresponding side, the channel being used for a handling device to extend into and transfer the battery pack.

[0019] In this solution, the above-mentioned structure is adopted, which cleverly utilizes the characteristics of the pallet and auxiliary support structure of the bearing device to form a channel for transferring battery packs. This facilitates the insertion of handling equipment for transporting battery packs, and makes it easy to use a palletizer to transfer battery packs between the battery swapping equipment and the charging racks in the battery swapping station during the battery swapping process. Alternatively, if a problem occurs with the battery pack, a forklift can be used to remove the battery pack from the battery swapping equipment and transfer it outside the battery swapping station.

[0020] Preferably, the tray is floatingly connected to the platform base via a plurality of first elastic elements, and the second contact surfaces of the plurality of auxiliary support mechanisms are respectively floating relative to the platform base via second elastic elements;

[0021] The first elastic element and the second elastic element have the same specifications, and / or, a plurality of second elastic elements are provided in a one-to-one correspondence with a plurality of first elastic elements, and the plurality of second elastic elements surround the range of the plurality of first elastic elements.

[0022] In this design, the aforementioned structure ensures that the compression of the first and second elastic elements is the same when the battery pack is placed on the tray, thus guaranteeing the stability of the battery pack. Furthermore, positioning the second elastic element of the auxiliary support mechanism outside the coverage area of ​​the first elastic element on the tray provides even more stable support for the battery pack.

[0023] Preferably, when the battery pack carrier is unloaded, the first contact surface and the second contact surface are located on the same plane.

[0024] In this design, the aforementioned structure allows the first and second contact surfaces to simultaneously contact the battery pack when it is replaced, further ensuring the stability of the battery pack support device. The unloaded state refers to the state where the battery pack is not placed on the support device.

[0025] Preferably, the auxiliary support mechanism includes an abutment and a second elastic member, the second elastic member having a head end and a tail end along its length direction, the head end acting on the abutment, and the tail end acting on the platform base or acting on the platform base through a heightening bracket, so that the abutment can float relative to the platform base, and the second abutment surface is formed on the surface of the abutment facing the battery pack.

[0026] In this solution, the above-mentioned structure is adopted. Each auxiliary support mechanism has the advantage of small footprint and can be flexibly arranged on the platform base. This not only improves the stability of the battery pack but also makes the structure more compact and reduces the overall footprint of the platform base.

[0027] Preferably, the abutting member is an abutting plate; more preferably, the abutting plate is a non-metallic composite material plate; even more preferably, the abutting plate is a polytetrafluoroethylene (PTFE) material plate;

[0028] And / or, the tail end of the second elastic member acts on the platform base through a heightening bracket, the heightening bracket including two connecting plates for connecting the platform base, two extension plates for raising the abutment member, and a platform portion for placing the second elastic member, the two ends of the platform portion being respectively connected to the top ends of the two extension plates, and the bottom ends of the two extension plates being respectively connected to the two connecting plates.

[0029] In this solution, when the abutment plate is made of polytetrafluoroethylene (PTFE), it can give the second abutment surface of the auxiliary support mechanism high hardness and low coefficient of friction, thus avoiding deformation of the second abutment surface and also avoiding excessive bending moment in the direction perpendicular to the extension and contraction caused by friction between the battery pack and the auxiliary support mechanism. In addition, the abutment plate made of PTFE is also lighter in weight.

[0030] The second elastic element is raised by using a heightening bracket, which makes it easier to increase the height of the abutment. At the same time, it can avoid the disadvantage of the second elastic element being too long, which leads to a decrease in stability (mainly due to the tendency to bend, thereby reducing the stability of the auxiliary bearing mechanism). The aforementioned heightening bracket is not only lightweight, simple in structure, and easy to manufacture, but also easy to ensure processing accuracy.

[0031] Preferably, the interior of the second elastic member has a receiving cavity formed at least at the beginning and the end along the length direction of the second elastic member:

[0032] The abutment is connected to a column on the surface of the battery pack away from the abutment member, and the receiving cavity of the first end of the second elastic member is sleeved outside the column, and the first end of the second elastic member abuts against the surface of the abutment member away from the battery pack.

[0033] And / or, the tail end of the second elastic element is connected to a tail end limiting mechanism, the tail end limiting mechanism including a mounting base plate and a positioning post, the mounting base plate being fixed to the platform base or fixed to the platform base via a heightening bracket, the positioning post being fixed to the mounting base plate, and the receiving cavity at the tail end of the second elastic element being sleeved outside the positioning post and abutting against the mounting base plate.

[0034] Preferably, the tail end limiting mechanism further includes a protective sleeve and at least one connector. The protective sleeve is fixed to the mounting base and sleeved on the tail end of the second elastic member. The connector passes through the protective sleeve and the second elastic member to fix the second elastic member.

[0035] In this solution, the above structure serves two purposes: firstly, it limits the position of the abutment plate; secondly, the abutment plate can be reliably supported above the second elastic member by the column.

[0036] The protective sleeve further restricts the bending and radial movement of the second elastic element, and the connector prevents the second elastic element from popping out or being pulled out by the abutment. Thus, the cooperation between the protective sleeve and the connector can improve the reliability of the second elastic element, thereby further improving the reliability of battery swapping.

[0037] Preferably, the tray includes two sub-trays spaced apart and a plurality of connecting plates connected between the two sub-trays, with the side of the sub-trays facing the battery pack forming the first contact surface.

[0038] In this solution, the aforementioned structure, while maintaining the integrity of the tray, incorporates a perforated design. This design reduces the tray's weight while ensuring strength. Furthermore, the spacing between the two sub-trays facilitates observation of the structure beneath the tray and allows for the placement of sensors, such as proximity switches to detect the presence of a battery pack. The connecting plate ensures that the two sub-trays sway in the same direction, improving the tray's stability. Without the connecting plate, the springs beneath the two sub-trays might sway slightly in different horizontal directions after the battery pack is placed on the tray. Connecting the two sub-trays together with the connecting plate avoids this problem.

[0039] Preferably, the bottom of the sub-tray is provided with a first reinforcing member and a second reinforcing member, the first reinforcing member extending laterally along the tray and the second reinforcing member extending longitudinally along the tray, and the first reinforcing member and the second reinforcing member being cross-connected;

[0040] And / or, a third reinforcing member is provided on the inner side of the connection between the sub-tray and the connecting plate, and the two adjacent sides of the third reinforcing member abut against the sub-tray and the connecting plate respectively;

[0041] And / or, the bottom of the connecting plate is provided with a fourth reinforcing member;

[0042] And / or, the sub-tray has a chamfered corner on the side away from the connecting plate.

[0043] In this solution, the above-mentioned structure is adopted, which enhances the load-bearing capacity and structural stability of the two sub-pallets; strengthens the structural strength of the connection between the sub-pallets and the connecting plate; enhances the load-bearing capacity and structural stability of the connecting plate; reduces the sharpness of the pallet corners, avoiding collisions with the battery pack and preventing damage to the battery pack; and solves the problem of stress concentration, making the pallet less prone to deformation.

[0044] Preferably, the battery pack carrying device further includes a limiting mechanism, which includes a plurality of limiting blocks disposed on the first abutment surface. The limiting blocks are used to extend into the limiting holes disposed in the battery pack. Each limiting block is used to restrict the movement of the battery pack in one direction within the first abutment surface. The plurality of limiting blocks are used to restrict the movement of the battery pack within the first abutment surface from at least two different directions that are not on a straight line.

[0045] In this solution, the aforementioned structure is employed. By setting multiple limiting blocks on the first contact surface, the limiting blocks can restrict the battery pack from shifting relative to the tray after it is placed on the tray. Simultaneously, the multiple limiting blocks restrict the battery pack's movement relative to the tray from two different directions that are not on the same straight line, further preventing misalignment between the battery pack and the electric vehicle chassis due to battery pack displacement, thus improving the placement stability of the battery pack. Furthermore, the limiting blocks also improve the positional accuracy of the battery pack relative to the tray or the electric vehicle chassis. In this invention, "not on the same straight line" means neither the same direction nor opposite directions.

[0046] Preferably, the battery swapping device has a battery pack receiving cavity recessed in a direction away from the battery pack, and the carrying device is disposed within the battery pack receiving area.

[0047] In this solution, the above structure is adopted, which improves the overall compactness of the battery swapping equipment and helps to reduce the overall height of the battery swapping equipment.

[0048] A battery swapping device, the battery swapping device including a battery pack carrying device as described in any of the above.

[0049] In this solution, when replacing the battery pack of an electric vehicle using this battery swapping equipment, the battery pack can be prevented from tilting, thus improving the stability of the battery pack support device when carrying and replacing the battery pack. At the same time, if the chassis of the electric vehicle has a certain tilt angle, the battery swapping equipment makes the battery pack and the chassis of the electric vehicle fit more closely, improving the reliability of battery swapping.

[0050] Preferably, the plurality of auxiliary support mechanisms are spaced apart from the tray along the traveling direction of the power swapping equipment.

[0051] In this solution, during the process of the battery swapping equipment moving the battery pack to the electric vehicle chassis, the floating auxiliary support mechanism can absorb the inertial sway of the battery pack along the direction of movement of the battery swapping equipment, prevent the battery pack from sliding relative to the battery pack's support device, and improve the stability of the battery pack.

[0052] Preferably, the battery swapping equipment further includes an equipment frame, and the battery pack support device is disposed within the equipment frame and can be raised and lowered relative to the equipment frame.

[0053] In this solution, the above structure is adopted. On the one hand, the equipment frame protects the battery pack's load-bearing device. On the other hand, it helps to reduce the height of the battery pack during transportation to adapt to the vehicle chassis height.

[0054] Preferably, there are multiple auxiliary support mechanisms distributed outside the two opposite sides of the tray. A channel is formed between each of the two opposite sides of the tray and the auxiliary support mechanism outside the corresponding side. The channel is used for a transport device to extend into and transfer the battery pack.

[0055] The device frame has a recess that communicates with the channel. The opening of the recess faces the battery pack. When the battery pack is placed on the support device, the recess is lower than the first contact surface and the second contact surface.

[0056] In this solution, by adopting the above structure, when the battery pack is placed on the carrier device, the handling equipment can enter the channel under the battery pack from the recess to transfer the battery pack, thus avoiding interference between the handling equipment and the battery pack.

[0057] The positive and progressive effects of this invention are as follows:

[0058] This invention assists in supporting the battery pack by setting auxiliary support mechanisms at intervals around the periphery of the tray. The battery pack is placed on the battery pack support device via a first and second contact surface. This prevents the battery pack from tilting (or even tipping over) even with a small-area tray, improving the stability of the battery pack support device when carrying and replacing the battery pack. Furthermore, the contact surfaces between the tray and auxiliary support mechanisms and the battery pack employ a floating structure, allowing for a closer fit and increasing the contact area between the support device and the battery pack, thus improving the stability of the battery pack placement. Additionally, the floating structure acts as a buffer, reducing hard collisions between the elastic tray and the battery pack, and between the auxiliary support mechanisms and the battery pack, thereby reducing wear on the tray and auxiliary support mechanisms and damage to the battery pack. Simultaneously, if the electric vehicle chassis has a certain tilt angle, the floating structure ensures a closer fit between the battery pack and the electric vehicle chassis, improving the reliability of battery swapping. This structure is not only suitable for battery pack replacement in small passenger cars but also for medium and large vehicles, especially light and heavy trucks. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the structure of a battery swapping device according to a preferred embodiment of the present invention.

[0060] Figure 2 This is a schematic diagram showing the positional relationship between the auxiliary support mechanism and the first elastic element in a preferred embodiment of the present invention.

[0061] Figure 3 for Figure 1 A schematic diagram of the auxiliary support mechanism.

[0062] Figure 4 for Figure 3 A cross-sectional schematic diagram.

[0063] Figure 5 for Figure 2 A structural diagram from another perspective.

[0064] Figure 6 for Figure 1 A schematic diagram of the structure of the middle tray.

[0065] Figure 7 for Figure 6 Enlarged view of section A.

[0066] Figure 8 for Figure 1 A schematic diagram of the back structure of the middle tray.

[0067] Figure 9 This is a schematic diagram of the battery pack structure according to a preferred embodiment of the present invention.

[0068] Figure 10 for Figure 9 A schematic diagram of the middle push rod mechanism.

[0069] Figure 11 This is a schematic diagram of the chassis structure of an electric vehicle equipped with a battery pack, according to a preferred embodiment of the present invention.

[0070] Figure 12 for Figure 11 A schematic diagram of the structure of the vehicle body support.

[0071] Figure 13 This is a schematic diagram of the unlocking component of a battery swapping device according to a preferred embodiment of the present invention.

[0072] Explanation of reference numerals in the attached figures

[0073] Battery pack 300

[0074] Box end locking module 304

[0075] Battery pack carrier 100

[0076] 200 battery swapping devices

[0077] Tray 1

[0078] First contact surface 11

[0079] Sub-tray 13

[0080] First reinforcement component 131

[0081] Second reinforcing component 132

[0082] Third reinforcement component 133

[0083] Connecting plate 14

[0084] Limiting mechanism 15

[0085] Platform base 2

[0086] Auxiliary support mechanism 3

[0087] Second contact surface 31

[0088] Second elastic element 32

[0089] Attachment 33

[0090] 34-inch height increase bracket

[0091] Connector plate 341

[0092] Extension plate 342

[0093] Platform Department 343

[0094] Column 35

[0095] Tail end limiting mechanism 36

[0096] Install base plate 361

[0097] Positioning post 362

[0098] 363 Protective Case

[0099] Connector 364

[0100] Channel 6

[0101] Equipment Frame 5

[0102] Recess 51

[0103] Limit block 21

[0104] Limiting surface 213

[0105] Limiting part 214

[0106] Guiding section 215

[0107] First guide surface 2151

[0108] Second guide surface 2152

[0109] 20 longitudinal beams for vehicle body

[0110] Body bracket 30

[0111] Locking mechanism 40

[0112] Push rod mechanism 4

[0113] Push rod 41

[0114] First elastic element 7

[0115] Unlocking part 8 Detailed Implementation

[0116] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0117] like Figures 1-13 As shown, this embodiment discloses a battery pack carrying device 100, which is used to be installed on a battery swapping device 200 to carry the battery pack. The battery pack carrying device 100 includes a platform base 2, a tray 1, and an auxiliary support mechanism 3. The tray 1 is floatingly connected to the platform base 2 and has a first contact surface 11 for abutting against the battery pack. The auxiliary support mechanism 3 is disposed on the platform base 2 and spaced apart from the tray 1. The auxiliary support mechanism 3 has a second contact surface 31 for abutting against the battery pack. The second contact surface 31 can float relative to the platform base 2.

[0118] For battery packs with high energy, they are usually large in size and mass. In this case, using a small tray 1 to support the battery will significantly reduce the stability of the battery placed on the tray 1, and the shaking amplitude of the battery pack will also increase during the operation of the battery swapping equipment 200, which will adversely affect the safety of the battery swapping process. On the other hand, a large tray 1 will increase the cost, weight and complexity of the battery swapping equipment 200. Furthermore, the tray 1 is usually equipped with upper and lower shelves that can move perpendicular to the direction of travel to adapt to the parking position of the vehicle. If the size of the tray 1 is increased, the upper and lower shelves will inevitably be increased accordingly, which is not conducive to reducing the overall size of the battery swapping equipment 200.

[0119] In this embodiment, auxiliary support mechanisms 3 are spaced apart around the periphery of the tray 1 to assist in supporting the battery pack. The battery pack is placed on the battery pack support device 100 via the first contact surface 11 and the second contact surface 31. This avoids the battery pack tilting (or even tipping over) when using a small-area tray 1, improving the stability of the battery pack support device 100 when carrying and replacing the battery pack. Furthermore, the contact surfaces between the tray 1 and the auxiliary support mechanism 3 and the battery pack adopt a floating structure, allowing for a closer fit between the tray 1 and the auxiliary support mechanism 3 and the battery pack, increasing the contact area between the support device and the battery pack, and improving the stability of the battery pack placement. Additionally, the floating structure also acts as a buffer, reducing hard collisions between the elastic tray 1 and the battery pack, and between the auxiliary support mechanism 3 and the battery pack, thereby reducing wear on the tray 1 and the auxiliary support mechanism 3 and damage to the battery pack. Simultaneously, if the chassis of the electric vehicle has a certain tilt angle, the floating structure allows the battery pack to fit more closely to the chassis of the electric vehicle, improving the reliability of battery swapping. The above structure is not only suitable for battery pack replacement in small passenger cars, but also for battery pack replacement in medium and large vehicles, especially light and heavy trucks.

[0120] Since the size of the tray 1 is smaller than that of the battery pack, the battery pack will protrude from the tray 1 after being placed on the tray 1. In this embodiment, multiple auxiliary support mechanisms 3 are provided, which are distributed on the two opposite sides of the tray 1, corresponding to the protruding part of the battery pack. This avoids the battery pack from tilting and improves the stability of the battery pack carrying device 100 when carrying and replacing the battery pack.

[0121] Two auxiliary support mechanisms 3 are provided on each of the two opposite sides of the tray 1, spaced apart. The two support mechanisms on each side of the tray 1 are arranged at intervals along the extension direction of the corresponding side of the tray 1. Since the battery pack with large energy capacity has a large volume and mass, using two or more spaced auxiliary support mechanisms 3 to support the extended part of the battery pack relative to the tray 1 makes the supporting force of the auxiliary support mechanisms 3 on the battery pack more uniform, thereby reducing the swaying amplitude of the battery pack during the operation of the battery swapping equipment 200 and improving the stability of the battery pack.

[0122] like Figure 5 As shown, to facilitate the insertion of handling equipment for transporting battery packs, channels 6 are formed between the two opposite sides of the pallet 1 and the auxiliary support mechanisms 3 outside their respective sides. These channels 6 are used for the handling equipment to extend and transfer the battery packs. The handling equipment can be the forks of a forklift or a palletizer. Thus, by cleverly utilizing the structural features of the pallet 1 and auxiliary support mechanisms 3 of the carrying device, channels 6 for transferring battery packs are formed. This facilitates the transfer of battery packs between the battery swapping equipment 200 and the charging rack within the battery swapping station using a palletizer during the swapping process, or the removal of the battery pack from the battery swapping equipment 200 and its transfer outside the battery swapping station by a forklift if a problem occurs.

[0123] like Figure 2 As shown, specifically, the tray 1 is floatingly connected to the platform base 2 via multiple first elastic elements 7, and the second contact surfaces 31 of multiple auxiliary support mechanisms 3 are floating relative to the platform base 2 via second elastic elements 32. The first elastic elements 7 and second elastic elements 32 have the same specifications, and the multiple second elastic elements 32 are arranged one-to-one with the multiple first elastic elements 7, and the multiple second elastic elements 32 surround the range of the multiple first elastic elements 7, thereby ensuring that when the battery pack is placed on the tray 1, the compression of the first elastic elements 7 and the second elastic elements 32 is the same, thus ensuring the stability of the battery pack. In this embodiment, there are four auxiliary support mechanisms 3, and the second elastic elements 32 of the four auxiliary support mechanisms 3 are arranged outside the coverage area of ​​the first elastic elements 7 of the tray 1. Specifically, along the traveling direction of the battery swapping equipment, two spaced-apart auxiliary support mechanisms 3 are respectively arranged on both sides of the tray 1, which can provide more stable support for the battery pack.

[0124] When the battery pack carrier 100 is in an unloaded state, the first contact surface 11 and the second contact surface 31 are located on the same plane. The unloaded state refers to the state in which the battery pack is not placed on the carrier. Thus, when the battery pack is replaced, the first contact surface 11 and the second contact surface 31 can contact the battery pack at the same time, which further ensures the stability of the battery pack carrier 100 when carrying the battery pack.

[0125] like Figure 3As shown, specifically, the auxiliary support mechanism 3 includes an abutment member 33 and a second elastic member 32. The second elastic member 32 has a head end and a tail end along its length. The head end acts on the abutment member 33, and the tail end acts on the platform base 2 or, through the raising bracket 34, on the platform base 2, so that the abutment member 33 can float relative to the platform base 2. A second abutment surface 31 is formed on the surface of the abutment member 33 facing the battery pack. Thus, a single auxiliary support mechanism 3 has the characteristic of small footprint, can be flexibly arranged on the platform base 2, and achieves improved battery pack stability while making the structure more compact and reducing the overall footprint of the platform base 2.

[0126] Furthermore, the abutting member 33 is an abutting plate, preferably a non-metallic composite material plate; more preferably, the abutting plate is a polytetrafluoroethylene (PTFE) plate. When the abutting plate is made of PTFE, it can give the second abutting surface 31 of the auxiliary support mechanism 3 high hardness and low coefficient of friction, thus avoiding deformation of the second abutting surface 31 and also avoiding excessive bending moment of the second elastic member 32 in the direction perpendicular to the extension and contraction caused by friction between the battery pack and the auxiliary support mechanism 3. In addition, the abutting plate made of PTFE is also lighter in weight.

[0127] like Figure 1 and Figure 3 As shown, in order to increase the height of the abutment 33 so that the second abutment surface 31 on the abutment 33 is on the same plane as the first abutment surface 11, the tail end of the second elastic member 32 acts on the platform base 2 through the heightening bracket 34. At the same time, it can also avoid the disadvantage of the second elastic member 32 being too long, which leads to a decrease in stability (mainly because it is easy to bend, thereby reducing the stability of the auxiliary bearing mechanism 3). The heightening bracket 34 is not only lightweight, simple in structure, and easy to manufacture, but also easy to ensure processing accuracy.

[0128] like Figure 4 As shown, specifically, the heightening bracket 34 includes two connecting plates 341 for connecting the platform base 2, two extension plates 342 for raising the abutment member 33, and a platform portion 343 for placing the second elastic member 32. The two ends of the platform portion 343 are respectively connected to the top ends of the two extension plates 342, and the bottom ends of the two extension plates 342 are respectively connected to the two connecting plates 341, thus the structure has good stability.

[0129] The interior of the second elastic member 32 is provided with a receiving cavity that extends through the first and last ends along the length direction of the second elastic member 32. The surface of the abutment member 33 facing away from the battery pack is connected to the column 35. The receiving cavity at the first end of the second elastic member 32 is sleeved outside the column 35, and the first end of the second elastic member 32 abuts against the surface of the abutment member 33 facing away from the battery pack. On the one hand, it serves to limit the position of the abutment plate, and on the other hand, the abutment plate can be reliably supported above the second elastic member 32 by the column 35.

[0130] The tail end of the second elastic member 32 is connected to a tail end limiting mechanism 36. The tail end limiting mechanism 36 includes a mounting base plate 361 and a positioning post 362. The mounting base plate 361 is fixed to the platform base 2 or fixed to the platform base 2 through the heightening bracket 34. The positioning post 362 is fixed on the mounting base plate 361. The receiving cavity at the tail end of the second elastic member 32 is sleeved outside the positioning post 362 and abuts against the mounting base plate 361. The mounting base plate 361 is located between the elastic member and the heightening bracket 34. The mounting base plate 361 is provided with a limiting hole. The positioning post 362 is located in the receiving cavity at the tail end of the second elastic member 32, and part of the positioning post 362 is inserted into the limiting hole. The cooperation between the positioning post 362 and the limiting hole can limit the movement of the second elastic member 32, thereby limiting the movement of the abutment member 33, which is beneficial to improving the stability of the battery pack and the reliability of battery swapping.

[0131] The positioning post 362 and the second elastic member 32 have a gap, so that the positioning post 362 will not affect the compression or elongation of the second elastic member 32, which can further improve the reliability of battery swapping.

[0132] The tail-end limiting mechanism 36 also includes a protective sleeve 363 and at least one connector 364. The protective sleeve 363 is fixed to the mounting base and sleeved on the tail end of the second elastic member 32. The connector 364 passes through the protective sleeve 363 and the second elastic member 32 (in some embodiments, it can abut against the positioning post 362) to fix the second elastic member 32. The protective sleeve 363 further restricts the bending and radial movement of the second elastic member 32, and the connector 364 prevents the second elastic member 32 from popping out or being pulled out by the abutment 33. Thus, the cooperation of the protective sleeve 363 and the connector 364 can improve the reliability of the second elastic member 32, and further improve the reliability of battery swapping.

[0133] Specifically, such as Figure 6As shown, tray 1 includes two spaced-apart sub-trays 13 and several connecting plates 341 connecting the two sub-trays 13. The side of the sub-tray 13 facing the battery pack forms a first abutment surface 11. While maintaining the integrity of tray 1, a perforation is formed in tray 1. This ensures strength while reducing the weight of tray 1. Furthermore, the spacing between the two sub-trays 13 facilitates observation of the structure beneath tray 1 and allows for the placement of sensors, such as proximity switches to detect whether a battery pack is placed on tray 1. The connecting plates 341 strengthen the two sub-trays 13, and when the battery pack is placed on tray 1, the connecting plates 341 ensure that the two sub-trays 13 sway in the same direction, improving the stability of tray 1. If the two sub-trays 13 are not connected by connecting plates 341, the springs beneath the two sub-trays 13 may sway slightly in different directions horizontally after the battery pack is placed on tray 1. Connecting the two sub-trays 13 into a whole using connecting plates 341 avoids this problem.

[0134] Among them, such as Figure 8 As shown, the bottom of the sub-pallet 13 is provided with a first reinforcing member 131 and a second reinforcing member 132. The first reinforcing member 131 extends laterally along the pallet 1, and the second reinforcing member 132 extends longitudinally along the pallet 1. The first reinforcing member 131 and the second reinforcing member 132 are cross-connected, thereby enhancing the load-bearing capacity and structural stability of the two sub-pallets 13.

[0135] A third reinforcing member 133 is provided on the inner side of the connection between the sub-tray 13 and the connecting plate 341. The two adjacent sides of the third reinforcing member 133 are respectively connected to the corresponding sub-tray 13 and the connecting plate 341. The third reinforcing member 133 is a reinforcing rib structure, thereby strengthening the structural strength of the connection between the sub-tray 13 and the connecting plate 341.

[0136] A fourth reinforcing member is provided on the side of the connecting plate 341 facing away from the battery pack, thereby enhancing the load-bearing capacity and structural stability of the connecting plate 341.

[0137] The side of the sub-tray 13 away from the connecting plate 341 has a chamfered corner. On the one hand, this reduces the sharpness of the corner of the tray 1, avoiding damage to the battery pack from collisions; on the other hand, it solves the problem of stress concentration, appropriately releasing stress, making the tray 1 less prone to deformation and increasing its service life.

[0138] like Figure 1 and Figure 6As shown, the battery pack carrying device 100 also includes a limiting mechanism 15. The limiting mechanism 15 includes multiple limiting blocks disposed on the first abutment surface 11. Each limiting block is used to extend into a limiting hole disposed on the battery pack. Each limiting block is used to limit the movement of the battery pack in one direction within the first abutment surface 11. The multiple limiting blocks are used to limit the movement of the battery pack within the first abutment surface 11 from at least two different directions that are not on the same straight line. By providing multiple limiting blocks on the first abutment surface 11, when the battery pack is placed on the tray 1, the limiting blocks can limit the displacement of the battery pack relative to the tray 1. At the same time, by using multiple limiting blocks to limit the movement of the battery pack relative to the tray 1 from two different directions that are not on the same straight line, the misalignment of the battery pack and the chassis of the electric vehicle due to battery pack displacement is further avoided, thus improving the placement stability of the battery pack. On the other hand, the limiting blocks also improve the positional accuracy of the battery pack relative to the tray 1 or relative to the chassis of the electric vehicle. In this invention, "not on the same straight line" means neither the same direction nor the opposite direction.

[0139] Specifically, such as Figures 6-7 As shown, the limiting block 21 includes a limiting part 214, which extends from the surface of the tray 1 in a direction away from the tray 1 to be inserted into the limiting hole at the bottom of the battery pack. The limiting part 214 has a limiting surface 213, which is a reference surface on the limiting block 21 for positioning with the limiting hole. The limiting block 21 can only be positioned by the limiting surface 213 cooperating with the side wall inside the limiting hole when the battery pack is placed on the tray 1. When the battery pack is placed on the tray 1, the limiting surface 213 of the limiting block 21 fits against the side wall of the limiting hole to prevent the battery pack from shifting in the direction of the limiting surface 213 of the limiting block 21. After the limiting surface 213 of the limiting block 21 fits against the side wall of the limiting hole, the other surfaces of the limiting block 21 can be open, that is, the other surfaces do not fit against the inner wall of the limiting hole. In this way, during processing, it is only necessary to ensure that the size of the limiting surface 213 matches the size of the limiting hole, ensuring the processing accuracy of the limiting surface 213, thereby reducing the processing steps. On the other hand, since the other surfaces do not have a limiting function, their size can be processed to be smaller than the size of the limiting hole, making it easier to insert into the limiting hole during installation and improving installation efficiency.

[0140] In this embodiment, the limiting part 214 has two opposing limiting surfaces 213. When the battery pack is placed on the tray 1, the two limiting surfaces 213 can cooperate with the inner wall of the limiting hole to achieve positioning. Using two opposing limiting surfaces 213 can respectively limit two opposite directions on a straight line, resulting in better positioning performance. In other embodiments, positioning can be achieved by having one limiting surface 213 on the limiting block 21 abut against the inner wall of the limiting hole; positioning can also be achieved by having three, four, or more limiting surfaces 213 on the limiting block 21 abut against the inner wall of the limiting hole.

[0141] The limiting block 21 also includes a guide portion 215, which extends from the top of the limiting portion 214 along the extending direction of the limiting portion 214. The width of the cross-section of the guide portion 215 gradually decreases along the extending direction of the guide portion 215. By providing the guide portion 215 above the limiting portion 214, during the insertion of the limiting block 21 into the limiting hole, the guide portion 215 first contacts and enters the limiting hole, followed by the limiting portion 214. Therefore, when the limiting block 21 is not aligned with the limiting hole, the guide portion 215, which is narrower at the top and wider at the bottom, allows the limiting portion 214 to be smoothly inserted into the limiting hole.

[0142] Specifically, the guide portion 215 has two opposing first guide surfaces 2151, which extend from the top edge of the limiting portion 214 at the limiting surface 213 toward the central axis of the limiting portion 214. The guide portion 215 also has a second guide surface 2152, which extends from the top edge of the limiting portion 214 outside the limiting surface 213 toward the central axis of the limiting portion 214, with a smooth transition between adjacent guide surfaces. Since there may be a positional deviation between the limiting block 21 and the limiting hole in the circumferential direction, the first guide surfaces 2151 and 2152 ensure smooth insertion of the limiting hole. The smooth transition makes the connection between the first guide surfaces 2151 and 2152 more rounded, reducing frictional loss between the guide portion 215 and the limiting hole, making it easier for the limiting portion 214 to enter the limiting hole, increasing service life, and ensuring the accuracy requirements for long-term use. In this embodiment, a smooth transition refers to setting an arc-shaped connecting surface between adjacent first guide surfaces 2151 and second guide surfaces 2152.

[0143] In order to improve the overall compactness of the battery swapping equipment 200 and reduce the overall height of the battery swapping equipment 200, the battery swapping equipment 200 has a battery pack receiving cavity recessed in the direction away from the battery pack, and the supporting device is set in the battery pack receiving area.

[0144] This embodiment also discloses a battery swapping device 200, which includes a battery pack support device 100 as described above. When replacing the battery pack of an electric vehicle using this battery swapping device 200, the battery pack can be prevented from tilting, improving the stability of the battery pack support device 100 when carrying and replacing the battery pack. Furthermore, if the chassis of the electric vehicle has a certain tilt angle, the battery swapping device 200 makes the battery pack and the chassis of the electric vehicle fit more closely, improving the reliability of battery swapping.

[0145] The battery swapping device 200 is used to replace the battery pack 300 of electric vehicles. It is suitable for replacing battery packs in small passenger cars, but even more suitable for replacing battery packs in medium and large vehicles, especially light and heavy trucks. Compared to heavy trucks, light trucks have a lower chassis height, making them more suitable for chassis-based battery swapping using the device 200. This is because the device 200 has a recessed center and a low overall height, facilitating access under the chassis of light trucks for battery swapping without requiring a sunken space or pit for access.

[0146] like Figure 1 As shown, multiple auxiliary support mechanisms 3 and the tray 1 are along the traveling direction of the power swapping equipment 200 (i.e., Figure 1 The X-direction interval is set. During the process of the battery swapping equipment 200 moving the battery pack to the electric vehicle chassis, the floating auxiliary support mechanism 3 can absorb the inertial sway of the battery pack along the moving direction of the battery swapping equipment 200, avoid the battery pack sliding relative to the battery pack support device 100, and improve the stability of the battery pack.

[0147] The battery swapping equipment 200 also includes an equipment frame 5, and the battery pack support device 100 is located within the equipment frame 5 and can be raised and lowered relative to the equipment frame 5. On the one hand, the equipment frame 5 protects the battery pack support device 100, and on the other hand, it helps to reduce the height of the battery pack during transportation to adapt to the vehicle chassis height.

[0148] like Figure 1 As shown, the device frame 5 has a recess 51 communicating with the channel 6. The opening of the recess 51 faces the battery pack, and when the battery pack is placed on the support device, the recess 51 is lower than the first contact surface 11 and the second contact surface 31. When the battery pack is placed on the support device, the handling equipment can enter the channel below the battery pack from the recess 51 to transfer the battery pack, providing space for the handling equipment to extend under the battery pack.

[0149] Specifically, such as Figure 9 , Figures 11-13 As shown, the electric vehicle has two parallel longitudinal beams 20 arranged in the front-rear direction. The battery pack 300 is mounted below these two longitudinal beams 20. A vehicle frame 30 is connected to both longitudinal beams 20. Each locking mechanism 40 is located on the lower surface of the longitudinal beam of the vehicle frame 30 and is used to lock into the battery pack 300 via a box-end locking module 304. These locking mechanisms 40 are arranged sequentially along the length Y of the longitudinal beams 20 to improve the reliability and stability of the connection between the battery pack 300 and the vehicle frame 30 and longitudinal beams 20 through multi-point connection.

[0150] like Figure 10As shown, the battery pack 300 includes a push rod mechanism 4 for unlocking the locking mechanism 40 on the vehicle body bracket 30. The push rod mechanism 4 is arranged vertically inside the battery pack 300 and includes a push rod 41 extending vertically, which is movable in the vertical direction.

[0151] The battery swapping equipment has the function of unlocking and installing the battery pack 300. The specific battery swapping scheme for unlocking the battery pack 300 is as follows: the battery swapping equipment moves under the chassis of the electric vehicle, the supporting device 100 of the battery pack is raised to position the electric vehicle and the battery pack 300, the unlocking component 8 inside the battery swapping equipment is used to push the push rod mechanism 4 inside the battery pack 300 upward, and after the push rod mechanism 4 is pushed upward, it further pushes the locking linkage of the locking mechanism on the vehicle body bracket 30, and then the tray 1 is moved laterally to drive the locking mechanism 40 to unlock and disassemble the battery pack 300 onto the tray 1. Finally, the tray 1 is lowered and the battery swapping equipment moves away from the electric vehicle.

[0152] The specific battery swapping scheme for installing the battery pack 300 is as follows: the battery swapping device carrying the battery pack 300 is moved to the underside of the electric vehicle chassis. The unlocking component 8 inside the battery swapping device is used to lift the push rod mechanism 4 inside the battery pack 300. After the push rod mechanism 4 is lifted, it further lifts the locking linkage of the locking mechanism 40 on the vehicle body bracket 30. Then, the tray 1 is raised to install the battery pack 300 onto the electric vehicle and locked by the locking mechanism 40. Finally, the tray 1 is lowered and the battery swapping device moves away from the electric vehicle.

[0153] In addition to the aforementioned staggered locking mechanism 40, in other embodiments, the locking mechanism 40 may also be a threaded locking mechanism (a locking mechanism that fixes the battery box to the vehicle body by multiple bolts), a locking pin locking mechanism (a locking mechanism that fixes the battery box to the vehicle body by locking pin), a rotary locking mechanism (a locking mechanism that fixes the battery box to the vehicle body by rotating locking), a flip locking mechanism (a locking mechanism that fixes the battery box to the vehicle body by flip locking), a top-pressing locking mechanism (a locking mechanism that fixes the battery box to the vehicle body by top-pressing locking), a pin locking mechanism (a locking mechanism that fixes the battery box to the vehicle body by pin locking), a push-pull locking mechanism (a locking mechanism that fixes the battery box to the vehicle body by push-pull locking), and so on.

[0154] After the battery pack 300 is unlocked from the electric vehicle, it exerts force on the tray 1. The auxiliary support mechanism 3 prevents the battery pack 300 from tilting (or even overturning) when using the small-area tray 1, thus improving the stability of the battery pack support device 100 when carrying and replacing the battery pack 300. Furthermore, the floating structure of the contact surfaces between the tray 1, the auxiliary support mechanism 3, and the battery pack 300 increases the contact area between the support device and the battery pack 300, improving the stability of the battery pack 300 placement. The floating structure also acts as a buffer, reducing hard collisions between the elastic tray 1 and the battery pack, and between the auxiliary support mechanism 3 and the battery pack 300, thereby reducing wear on the tray 1 and the auxiliary support mechanism 3 and damage to the battery pack 300. Simultaneously, if the electric vehicle's chassis has a certain tilt angle, the floating structure ensures a closer fit between the battery pack 300 and the electric vehicle's chassis, improving the reliability of battery swapping.

[0155] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A battery pack carrying device for mounting on a battery swapping device to carry a battery pack, characterized in that, The battery pack carrying device includes: Platform base; The tray is floatingly connected to the platform base and has a first contact surface for abutting against the battery pack; An auxiliary support mechanism is disposed on the platform base and spaced apart from the tray. The auxiliary support mechanism has a second abutment surface for abutting against the battery pack, and the second abutment surface is floatable relative to the platform base. The auxiliary support mechanism is provided in multiple ways, and the multiple auxiliary support mechanisms are distributed outside the two opposite sides of the tray. At least two auxiliary support mechanisms are provided at intervals outside the two opposite sides of the tray. A channel is formed between each of the two opposite sides of the tray and the auxiliary support mechanism outside its corresponding side, the channel being used for a handling device to extend into and transfer the battery pack.

2. The battery pack carrying device as described in claim 1, characterized in that, Two auxiliary support mechanisms are provided at intervals on each of the two opposite sides of the pallet.

3. The battery pack carrying device as described in claim 1, characterized in that, At least two of the support mechanisms, outside each side of the pallet, are spaced apart along the extension direction of the corresponding side of the pallet.

4. The battery pack carrying device as described in claim 1, characterized in that, The tray is floatingly connected to the platform base via multiple first elastic elements, and the second contact surfaces of the multiple auxiliary support mechanisms are floating relative to the platform base via second elastic elements. The first elastic element and the second elastic element have the same specifications, and / or, a plurality of second elastic elements are provided in a one-to-one correspondence with a plurality of first elastic elements, and the plurality of second elastic elements surround the range of the plurality of first elastic elements.

5. The battery pack carrying device as described in claim 1, characterized in that, When the battery pack's support device is unloaded, the first contact surface and the second contact surface are located on the same plane.

6. The battery pack carrying device as described in claim 1, characterized in that, The auxiliary support mechanism includes an abutment and a second elastic member. The second elastic member has a head end and a tail end along its length. The head end acts on the abutment, and the tail end acts on the platform base or acts on the platform base through a heightening bracket, so that the abutment can float relative to the platform base. The second abutment surface is formed on the surface of the abutment facing the battery pack.

7. The battery pack carrying device as described in claim 6, characterized in that, The abutment component is an abutment plate.

8. The battery pack carrying device as described in claim 7, characterized in that, The abutment plate is a non-metallic composite material plate.

9. The battery pack carrying device as described in claim 8, characterized in that, The abutment plate is made of polytetrafluoroethylene.

10. The battery pack carrying device as described in claim 6, characterized in that, The tail end of the second elastic member acts on the platform base through a heightening bracket. The heightening bracket includes two connecting plates for connecting the platform base, two extension plates for raising the abutment member, and a platform portion for placing the second elastic member. The two ends of the platform portion are respectively connected to the top ends of the two extension plates, and the bottom ends of the two extension plates are respectively connected to the two connecting plates.

11. The battery pack carrying device as described in claim 6, characterized in that, The interior of the second elastic member has a receiving cavity formed at least at the beginning and the end along the length direction of the second elastic member: The abutment is connected to a column on the surface of the battery pack away from the abutment member, and the receiving cavity of the first end of the second elastic member is sleeved outside the column, and the first end of the second elastic member abuts against the surface of the abutment member away from the battery pack. And / or, the tail end of the second elastic member is connected to a tail end limiting mechanism, the tail end limiting mechanism includes a mounting base plate and a positioning post, the mounting base plate is fixed to the platform base or fixed to the platform base by a heightening bracket, the positioning post is fixed to the mounting base plate, and the receiving cavity of the tail end of the second elastic member is sleeved outside the positioning post and abuts against the mounting base plate.

12. The battery pack carrying device as described in claim 11, characterized in that, The tail end limiting mechanism further includes a protective sleeve and at least one connector. The protective sleeve is fixed to the mounting base plate and sleeved on the tail end of the second elastic member. The connector passes through the protective sleeve and the second elastic member to fix the second elastic member.

13. The battery pack carrying device as claimed in claim 1, characterized in that, The tray includes two sub-trays spaced apart and several connecting plates connected between the two sub-trays, with the side of the sub-trays facing the battery pack forming the first contact surface.

14. The battery pack carrying device as described in claim 13, characterized in that, The bottom of the sub-tray is provided with a first reinforcing member and a second reinforcing member. The first reinforcing member extends laterally along the tray, and the second reinforcing member extends longitudinally along the tray. The first reinforcing member and the second reinforcing member are connected at an intersection. And / or, a third reinforcing member is provided on the inner side of the connection between the sub-tray and the connecting plate, and the two adjacent sides of the third reinforcing member abut against the sub-tray and the connecting plate respectively; And / or, the bottom of the connecting plate is provided with a fourth reinforcing member; And / or, the sub-tray has a chamfered corner on the side away from the connecting plate.

15. The battery pack carrying device as claimed in claim 1, characterized in that, The battery pack carrying device further includes a limiting mechanism, which includes a plurality of limiting blocks disposed on the first abutment surface. The limiting blocks are used to extend into the limiting holes disposed on the battery pack. Each limiting block is used to restrict the movement of the battery pack in one direction within the first abutment surface. The plurality of limiting blocks are used to restrict the movement of the battery pack within the first abutment surface from at least two different directions that are not on a straight line.

16. The battery pack carrying device according to any one of claims 1-15, characterized in that, The battery swapping device has a battery pack receiving cavity recessed in a direction away from the battery pack, and the supporting device is disposed within the battery pack receiving area.

17. A battery swapping device, characterized in that, The battery swapping equipment includes a battery pack carrying device as described in any one of claims 1-16.

18. The battery swapping equipment as described in claim 17, characterized in that, Multiple auxiliary support mechanisms are spaced apart from the tray along the traveling direction of the power swapping equipment.

19. The battery swapping equipment as described in claim 17, characterized in that, The battery swapping equipment also includes an equipment frame, and the battery pack support device is located within the equipment frame and can be raised and lowered relative to the equipment frame.

20. The battery swapping equipment as described in claim 19, characterized in that, The auxiliary support mechanism is provided in multiple ways, and the multiple auxiliary support mechanisms are distributed outside the two opposite sides of the tray. A channel is formed between the two opposite sides of the tray and the auxiliary support mechanism outside the corresponding side. The channel is used for the conveying equipment to extend into and transfer the battery pack. The device frame has a recess that communicates with the channel. The opening of the recess faces the battery pack. When the battery pack is placed on the support device, the recess is lower than the first contact surface and the second contact surface.

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