Battery assembly of electric equipment and battery exchange and charging system

Abstract

The invention provides a battery assembly of electric equipment and a battery exchange and charging system. The battery assembly comprises a battery body, a handle cover and at least one lantern ring. The battery body is columnar and is provided with a cylindrical surface and two end surfaces positioned on the opposite sides of the cylindrical surface, and the end surfaces are adjacently connected by the side edge of the cylindrical surface in a surrounding manner; the handle cover is arranged on the end face of the battery body. The lantern ring is sleeved on the cylindrical surface of the battery body, the handle cover is buckled with the lantern ring, and the lantern ring is buckled with the battery body.

Description

Technical Field

[0001] This invention relates to a battery assembly, and more particularly to a battery assembly for an electric device and a battery swapping and charging system. Background Technology

[0002] With rising environmental awareness, the concept of energy conservation and carbon reduction has gained increasing attention, and the development and utilization of green energy has become a key focus for countries worldwide. As a result, electric devices have become increasingly popular in recent years, primarily because they do not require traditional fuels for propulsion and therefore do not emit exhaust gases, aligning with current energy conservation, carbon reduction, and environmental protection principles. Electric devices mainly utilize attached battery modules (referred to as batteries) to supply sufficient electrical energy to a drive motor. The drive motor then drives the drive wheels or drive mechanism of the electric device, converting electrical energy into kinetic energy to rotate the wheels or operate the mechanism, thus enabling the device to move or function without traditional fuel. However, considering the battery's lifespan, after a period of use (e.g., a few years), the battery's power significantly decreases and can no longer meet the required range and speed. These batteries can still be reused and retired, known as obsolete batteries. Currently, dedicated battery swapping stations face the challenge of declining battery usage due to battery upgrades and eventual obsolescence. Therefore, there is no incentive to add backup power stations that are not used for swapping after charging and are solely for energy storage.

[0003] The batteries mentioned above are defined here as modular single-specification batteries (non-international standard specification batteries) from their respective manufacturers. They are used for energy replenishment and exchange in a designed dedicated or universal charging and exchange device. One or more single-specification batteries can be exchanged for various different electric devices. Batteries can also be used exclusively for energy storage without being exchanged. Therefore, batteries that can be used in electric devices refer to mobile electric vehicles such as electric cars, electric locomotives, electric engineering machinery, electric ships, other electric transportation devices, artificial intelligence (AI), etc., as well as non-mobile fixed energy storage devices.

[0004] With the continuous advancement of battery materials and technology, swappable batteries are increasingly used to eliminate waiting time for electric devices. However, there are significant differences in the lifespan of swappable batteries and the lifespan of electric devices (discharging end) and charging devices (energy storage devices that don't swap batteries or charging devices that swap batteries). In terms of technological updates, batteries are typically replaced every 5 years, becoming obsolete. In contrast, the lifespan of electric devices and charging devices (whether swappable or not) is approximately 20 years or longer. Therefore, the charging and discharging terminals of older models with swappable or non-swap batteries need to be extended to serve consumers of existing or newly purchased electric devices. Furthermore, existing battery swapping stations that were originally designed for single-model batteries can now serve at least one or more different battery types due to this invention. This prevents dedicated swapping stations from becoming obsolete due to single-model battery upgrades; instead, the invention extends the lifespan of swapping stations that can be used with both new and old batteries. The technology was retained so that when there is a power outage or insufficient power during peak hours, the energy storage function of the decommissioned battery is added in addition to the original main power supply. This serves as a second backup power source for the charging and switching device. In addition to allowing the charging and switching batteries to continuously replenish power without interruption, it can also serve as emergency lighting and support the power needs of electric equipment that cannot be shut down due to power outages. This is a very good idea, especially since future home, community, or electric equipment switching devices will need a second type of energy storage and non-switching backup power source, which is different from the past single charging function. This can be regarded as a "hybrid energy storage and non-switching and charging switching device that cannot be shared by a single battery".

[0005] The adoption of new batteries is based on considerations such as performance, safety, cost, climate, or weight reduction. Battery modifications are made to approximate the energy of the existing battery, even if the energy density per unit volume is slightly higher or lower. However, introducing new batteries also presents challenges related to older charging devices and electrical equipment. First, the new and old batteries have different external dimensions, generally trending towards smaller sizes. Therefore, the battery compartments of charging (non-exchangeable or exchangeable) devices and the discharge battery compartments of older electrical equipment are clearly incompatible with the new batteries, making modification difficult.

[0006] Furthermore, for manufacturers, introducing new batteries while also supporting existing older models presents challenges. The charging and switching devices for the new and old batteries differ in battery compartment size, and the discharge end of the electric devices also faces the same issue—different battery compartment sizes. The challenge lies in simultaneously accommodating both new and old charging and switching devices while ensuring the battery placement functionality of both types of electric devices. This necessitates addressing these differences to both expand into new markets and maintain existing customer bases and services. Consequently, considerations such as cost, consumer habits, and management can easily hinder the adoption of new batteries. Summary of the Invention

[0007] This invention relates to a battery assembly for an electric device, which provides corresponding accessories for new batteries to adapt to the battery placement and positioning of older electric devices and the battery placement and positioning of charging (non-exchangeable or exchangeable) devices. At the same time, it allows new and old batteries to coexist without changing the charging slot used in the charging exchange device and the discharge slot used in the electric device, and has a cover (or cushion) for positioning restriction.

[0008] This invention relates to a battery swapping and charging system that can accommodate both new and obsolete batteries.

[0009] According to an embodiment of the present invention, a battery assembly for an electric device includes a battery body, a handle cover, and at least one ring. The battery body is cylindrical and has a cylindrical surface and two end faces located on opposite sides of the cylindrical surface, the end faces being abutted by side edges surrounding the cylindrical surface. The handle cover is disposed on the end face of the battery body. The ring is sleeved on the cylindrical surface of the battery body, wherein the handle cover and the ring are interlocked, and the ring is interlocked with the battery body.

[0010] According to an embodiment of the present invention, a battery swapping and charging system includes multiple enclosures, at least one new-type battery, at least one battery module, multiple power sources, and a hybrid inverter. The enclosures can be stacked arbitrarily. The new-type battery is disposed in at least one of the enclosures, wherein the dimensions of the enclosure are adapted to the dimensions of the new-type battery. The battery module is disposed in at least another enclosure, wherein the dimensions of the battery module are adapted to the dimensions of the enclosure. An energy storage converter is electrically connected between the power sources and the enclosures to combine and convert the power from the power sources into single-source power to supply power to the battery module and the new-type battery within the enclosures, wherein the power sources and the battery module constitute a power backup module of the battery swapping and charging system. The battery module includes a battery body, a handle cover, and at least one collar. The battery body is cylindrical and has a cylindrical surface and two end faces located on opposite sides of the cylindrical surface, the end faces being abutted by the side edges of the cylindrical surface. The handle cover is disposed on the end face of the battery body. The collar is sleeved on the cylindrical surface of the battery body, wherein the handle cover and the collar are interlocked, and the collar is interlocked with the battery body.

[0011] Based on the above, when a battery needs to be upgraded, to avoid the aforementioned problems, the new battery can be further equipped with a handle cover and at least one ring on its battery body. The ring fits onto the cylindrical surface of the battery body, with the handle cover and ring interlocking, and the ring and battery body interlocking, thus completing the assembly of the battery body and related accessories. In this way, the new battery can be adapted to the charging (non-replaceable or replaceable) device compartments, as well as the battery positioning of older electric device compartments and the battery depth of compartments with lids or cushions. This maintains the battery height, avoids recalling older electric devices for lid or cushion replacement, effectively preserving the usability of older batteries, improving the applicability of the new battery, and allowing it to be introduced to the market without hindrance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a battery assembly according to an embodiment of the present invention;

[0013] Figure 2A and Figure 2B Exploded views of the battery assembly are shown from different perspectives;

[0014] Figure 3 This is a cross-sectional view of the battery assembly;

[0015] Figure 4A and Figure 4B These are cross-sectional views of battery assemblies according to different embodiments of the present invention;

[0016] Figure 5 This is an exploded view of a battery assembly according to another embodiment of the present invention;

[0017] Figure 6 yes Figure 5 A cross-sectional view of the battery assembly;

[0018] Figure 7 yes Figure 5 A schematic diagram of the battery assembly;

[0019] Figure 8A This is a schematic diagram of a battery swapping and charging system;

[0020] Figure 8B yes Figure 8A The diagram shows the electrical relationships between the relevant components in the system.

[0021] Explanation of icon numbers

[0022] 100, 200: Battery Components

[0023] 110, 210: Battery body

[0024] 111: Groove

[0025] 112: Positioning Port

[0026] 113: Connector

[0027] 120, 220: Ring

[0028] 121: Wall

[0029] 121a: Wall pier

[0030] 121b: Wall protection

[0031] 122, 221c: Ribs

[0032] 123: Kagou II

[0033] 124: Kagouyi

[0034] 125, 221a: Vent holes

[0035] 130: Handle cover

[0036] 131: Cover

[0037] 131a: Inner wall

[0038] 131b: Groove

[0039] 132: Handle

[0040] 140: Thick and thin pads

[0041] 141: Block One

[0042] 142: Block Two

[0043] 211: Bump

[0044] 300: Battery swapping and charging system

[0045] 310: Enclosure

[0046] 320: Energy Storage Converter

[0047] 410, 420, 430: Power source

[0048] 500: New Battery Regulations

[0049] A1: Battery Exchange Area

[0050] A2: Backup Power Zone

[0051] CM: Control Module

[0052] S1: Cylindrical surface

[0053] S2, S3: End face Detailed Implementation

[0054] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same component reference numerals are used in the drawings and description to denote the same or similar parts.

[0055] Figure 1 This is a schematic diagram of a battery assembly according to an embodiment of the present invention. Figure 2A and Figure 2B Exploded views of the battery assembly are shown from different perspectives. Please also refer to... Figure 1 , Figure 2A and Figure 2B In this embodiment, the battery assembly 100 of the electric device (hereinafter referred to as battery assembly 100) includes a battery body 110, a thick and thin pad 140, a handle cover 130, and at least one collar 120. The battery body 110 is cylindrical and has a cylindrical surface S1 and two end faces S2 and S3 located on opposite sides of the cylindrical surface S1, with each end face S2 and S3 being abutted by a side edge surrounding the cylindrical surface S1. The thick and thin pad 140 is disposed on the end face S2 of the battery body 110. The handle cover 130 is disposed on the thick and thin pad 140. The collar 120 is sleeved on the cylindrical surface S1 of the battery body 110, wherein the handle cover 130 and the collar 120 are interlocked, and the collar 120 and the battery body 110 are interlocked to hold the thick and thin pad 140 between the handle cover 130 and the end face S2 of the battery body 110. The battery body 110 also has a connector 113 located on the end face S3.

[0056] In this embodiment, the collar 120 includes a wall 121, a plurality of hooks 124 and a plurality of hooks 2 123. Hooks 124 and hooks 2 123 extend from the wall 121 and are arranged in a ring. Hooks 124 are fastened to the battery body 110, while hooks 2 123 are fastened to the handle cover 130.

[0057] Figure 3 This is a cross-sectional view of the battery assembly. Please also refer to... Figure 2A , Figure 2B and Figure 3 The battery body 110 has at least one groove 111 encircling the cylindrical surface S1, which is fastened to the aforementioned hook 124. Furthermore, the handle cover 130 includes a cover body 131, a handle 132, and a groove 131b. The handle 132 extends from the outside of the cover body 131, while the groove 131b is encircling the inner wall 131a of the cover body 131, and the hook 123 is fastened to the groove 131b.

[0058] For the collar 120, its wall 121 includes a plurality of wall piers 121a arranged in a ring and spaced apart, with the aforementioned hooks 124 and 123 located at the openings between the wall piers 121a. Furthermore, the collar 120 also has a plurality of ribs 122, each rib 122 connecting two adjacent wall piers 121a to form the aforementioned openings. Simultaneously, the hooks 124 and 123 located at the openings are respectively located on opposite sides of the ribs 122 and extend back-to-back, to... Figure 2A For example, hook 124 extends downward with its hook portion facing the inside of collar 120 to engage with groove 111 of battery body 110, and hook 2 123 extends upward with its hook portion facing the outside of collar 120 to engage with groove 131b of handle cover 130 (shown in...). Figure 2B ).

[0059] In addition, such as Figures 1 to 3 As shown in any of the embodiments, the wall 121 of the collar 120 also includes a protective wall 121b, which is disposed on the outside of the wall pier 121a, unlike the battery body 110 which is located on the inside and is contacted and restrained by the wall pier 121a. After the hook structure and the groove structure are connected, a portion of the periphery of the handle cover 130 is a recess located between the protective wall 121b and the wall pier 121a. In this embodiment, the protective wall 121b serves to allow the new battery body 110 to be adapted to the old-style container of the old-style electric vehicle and charging (or switching) equipment. For example, the collar 120 is adapted to the length and width of the old-style container by means of the protective wall 121b, and serves as a buffer structure between the new battery (i.e., the battery body 110) and the old-style container, while the inner diameter of the collar 120 is used to adapt it to the new battery (i.e., the battery body 110).

[0060] On the other hand, the thick and thin pad 140 includes a first block 141 and a second block 142. The second block 142 protrudes from the bottom of the first block 141 to be embedded in the positioning opening 112 of the battery body 110 located at the end face S2, and the first block 141 is clamped between the end face S2 and the cover 131 of the handle cover 130, so that the thick and thin pad 140 is positioned on the end face S2. Figure 3 As shown, the thick and thin pad 140 and the handle cover 130 thereon are used to ensure that the height of the battery body 110 of the new battery matches the depth of the old battery compartment. Here, the sum of the thickness of the thick and thin pad 140 and the thickness of the handle cover 130 can be appropriately adjusted according to the difference between the height of the new battery and the depth of the old battery compartment.

[0061] Please refer to this again. Figure 1In this embodiment, the collar 120 also has a vent 125, which is actually located on the rib 122 and is misaligned with the first hook 124 and the second hook 123. When the battery assembly 100 is placed into the old-style container, the collar 120 will actually abut against the wall of the old-style container and separate the space inside the container. Therefore, the vent 125 can be used to connect these separated spaces to facilitate airflow and provide heat dissipation to the battery body 110.

[0062] Based on the above, the handle cover 130, the thick and thin pads 140, and the collar 120 are interlocked via hook and groove structures, allowing these components to be assembled onto the battery body 110 of the new battery. This allows users to enjoy the superior performance of the new battery without worrying about its compatibility. In another embodiment (not shown), when the length of the new battery body is close to or even equal to the maximum length of the old battery, the thick and thin pads in the above embodiment will gradually become thinner or even be omitted. Conversely, the presence of the thick and thin pads will depend on the length of the battery body.

[0063] It should also be noted that this embodiment uses two collars 120 as an example, which are respectively fitted onto the cylindrical surface S1 and adjacent to the two end faces S2 and S3. This allows the smaller battery body 110 of the new battery to maintain its stability and not tilt when placed into the larger old-style cavity. Furthermore, the two collars 120 are fitted onto the upper and lower ends of the cylindrical surface S1 in an upside-down manner, thus achieving mass production of the collars 120 with a single mold, allowing the collars 120 to have a single structure and saving manufacturing costs.

[0064] Figure 4A and Figure 4B These are cross-sectional views of battery assemblies according to different embodiments of the present invention. Please refer to them respectively. Figure 4A and Figure 4B The present invention does not limit the number of collars; in essence, it needs to be adjusted according to the differences in size and structure between the battery body 110 of the new battery and the old container. Figure 4A Use a collar 120, or in Figure 4B The three collars 120 used can all meet the compatibility requirements of the battery body 110 with the old-style container.

[0065] Figure 5 This is an exploded view of a battery assembly according to another embodiment of the present invention. Figure 6 yes Figure 5 A cross-sectional view of the battery assembly. Figure 7 yes Figure 5A schematic diagram of the battery assembly. Unlike the aforementioned battery body 110, this embodiment differs in that the battery body 210 of the battery assembly 200 has multiple protrusions 211 formed on its cylindrical surface S1 to engage with the hooks 124 of the collar 220. Furthermore, the collar 220 in this embodiment also includes ribs 221c disposed on the inner surface of the wall pier 121a. Therefore, when the collar 220 is fitted onto the cylindrical surface S1 of the battery body 210, the ribs 221c abut against the cylindrical surface S1, thereby forming a vent hole 221a therebetween. This vent hole, like the aforementioned vent hole 125, serves as a channel for gas flow, facilitating ventilation and heat dissipation for the battery body 210.

[0066] Figure 8A This is a schematic diagram of a battery swapping and charging system. Figure 8B yes Figure 8A The diagram shows the electrical relationships between the relevant components in the system. Please also refer to... Figure 8A and Figure 8B In this embodiment, the battery swapping and charging system 300 includes multiple enclosures 310, new standard batteries 500, battery modules 100, multiple power sources 410, 420, and 430, and a power conversion system (PCS) 320. The enclosures 310 can be stacked arbitrarily, and as shown... Figure 8A As shown, the stacked housing 310 in this embodiment can be further divided into a battery exchange area A1 and a backup power area A2.

[0067] In this embodiment, the internal dimensions of the housing 310 are adapted to the external dimensions of the new battery 500. The battery body 110 is a decommissioned battery, and its dimensions are smaller than the internal dimensions of the housing 310. Therefore, the battery body 110 must be combined with the aforementioned peripheral components to form a battery assembly 100 (or battery assembly 200) to fit the housing 310. Accordingly, the housing 310 in this embodiment is planned as a battery exchange area A1 and a backup power area A2, and new batteries 500 and battery assemblies 100 (or battery assemblies 200) are respectively configured as needed.

[0068] For example, when the new-standard battery 500 is first put into use, the backup power area A2 stores battery modules 100 (or battery modules 200) of the decommissioned battery body 110, while the battery exchange area A1 stores the new-standard battery 500 and battery modules 100 (or battery modules 200). When the decommissioned battery body 110 reaches its service life, it is dismantled into recyclable batteries. At this time, the new-standard battery 500, after reaching a certain service life, will also be converted into a decommissioned battery and enter the backup power area A2, until finally the battery modules 100 (or battery modules 200) containing decommissioned batteries are completely replaced. Figure 8AThe above process of replacement is shown. If the backup power zone A2 faces a shortage of battery modules 100 (or battery modules 200), it can temporarily store and use the new standard batteries 500.

[0069] Based on the above component configuration, the battery swapping and charging system 300 can be electrically connected to multiple power sources 410 (e.g., solar power generation system), power source 420 (e.g., wind power generation system), power source 430 (e.g., known grid power system) and these enclosures 310 (electrical connectors) via the energy storage converter 320. This allows the energy storage converter 320 to combine the power from these power sources 410-430 and convert it into single-source power to supply the new battery 500 and battery module 100 inside the enclosure 310, thereby effectively and safely managing energy storage and discharge.

[0070] Furthermore, as previously stated, since the battery body 110 of battery assembly 100 (or the battery body 210 of battery assembly 200) are obsolete batteries, the housing 310 storing these battery assemblies 100 (or battery assembly 200) is further separated into the lower backup power area A2 through human factors design, while the storage of new batteries 500 is separated into the upper battery exchange area A1, which is convenient for users to exchange batteries.

[0071] like Figure 8B As shown, the battery swapping and charging system 300 also includes a control module CM, which adjusts the power supply to the energy storage converter 320, battery swapping area A1, and backup power area A2 as needed. For example, when the battery swapping and charging system 300 is in a power outage or peak power consumption period, and the power sources 410-430 do not have sufficient power or even no power available, the battery swapping and charging system 300 can use the battery module 100 (or battery module 200) located in the backup power area A2 to supply power to the new battery 500 in the battery swapping area A1, thereby maintaining the charging and swapping of the new battery 500 and preventing the battery swapping and charging system 300 from being in a complete failure state. Conversely, when the power sources 410-430 are in normal use (i.e., power is restored or the peak period has passed), the system can be restored to a state where the power sources 410-430 simultaneously supply power (charge) to both the new battery 500 and the battery module 100 (or battery module 200). This improves the operational efficiency and flexibility of the battery swapping and charging system 300, while also extending the service life of the battery body 110 (or battery body 210) which is being phased out.

[0072] In summary, in the above embodiments of the present invention, for the battery body of the new battery, through the assembly of accessories, namely, further fitting thick and thin pads, a handle cover, and at least one ring onto the battery body, the vent ring and the thick and thin pads dampen vibration and adjust the overall assembly height of the battery to adapt to the same external dimensions as the old battery, and correctly align with the charging and discharging port positions, and are disposed on the end face of the battery body. The handle cover is disposed on the thick and thin pads, and the ring is fitted onto the cylindrical surface of the battery body. The thick and thin pads are clamped between the handle cover and the end face of the battery body by the interlocking of the handle cover and the ring and the battery body. In this way, the battery body of the new battery is not only compatible with new electric devices and charging (non-exchange or exchange) devices, but also compatible with old charging (non-exchange or exchange) devices and the storage compartments of old electric devices, thereby improving the compatibility of the new battery, and effectively overcoming the related obstacles and doubts caused by battery model changes.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery swapping and charging system, characterized in that, include: Multiple boxes can be stacked arbitrarily. At least one new-specification battery is disposed in at least one of the plurality of housings, wherein the dimensions of the housings are adapted to the dimensions of the new-specification battery. At least one battery assembly is disposed in at least one of the plurality of housings, wherein the size specifications of the battery assembly are adapted to the size specifications of the housing, wherein the battery assembly includes: The battery body is cylindrical and has a cylindrical surface and two end faces located on opposite sides of the cylindrical surface, each end face being abutted by the side edge of the cylindrical surface. A handle cover is disposed on the end face of the battery body; and At least one ring is fitted onto the cylindrical surface of the battery body, wherein the handle cover is engaged with the ring, and the ring is engaged with the battery body. Multiple power sources; and An energy storage converter is electrically connected between the plurality of power sources and the plurality of enclosures to combine the power from the plurality of power sources and convert it into a single source of power to supply power to the battery assembly and the new battery in the enclosure, wherein the plurality of power sources and the battery assembly constitute the power backup module of the battery exchange and charging system.

2. A battery assembly for an electric device, characterized in that, include: The battery body is cylindrical and has a cylindrical surface and two end faces located on opposite sides of the cylindrical surface, each end face being abutted by the side edge of the cylindrical surface. A handle cover is disposed on the end face of the battery body; as well as At least one ring is fitted onto the cylindrical surface of the battery body, wherein the handle cover is engaged with the ring, and the ring is engaged with the battery body.

3. The battery assembly of the electric device according to claim 2, characterized in that, The at least one set of rings includes two sets of rings, which are fitted onto the cylindrical surface and respectively adjacent to the two end faces.

4. The battery assembly of the electric device according to claim 3, characterized in that, The two sets of rings are fitted onto the cylindrical surface in an upside-down manner.

5. The battery assembly of the electric device according to claim 2, characterized in that, The collar includes a wall, multiple hook 1 and multiple hook 2. The multiple hook 1 and multiple hook 2 extend from the wall and are arranged in a ring. The hook 1 is fastened to the battery body, and the hook 2 is fastened to the handle cover.

6. The battery assembly of the electric device according to claim 5, characterized in that, The battery body has at least one groove circumferentially disposed on the cylindrical surface and is fastened to one of the plurality of hooks.

7. The battery assembly of the electric device according to claim 5, characterized in that, The battery body has multiple protrusions on the cylindrical surface, which are respectively engaged with the multiple hooks.

8. The battery assembly of the electric device according to claim 5, characterized in that, The wall includes multiple wall piers arranged in a ring and spaced apart, and the multiple hooks one and multiple hooks two are respectively located at the openings between the multiple wall piers.

9. The battery assembly of the electric device according to claim 8, characterized in that, The collar also has multiple ribs, each of which is connected between two adjacent wall piers to form the pier opening. The first hook and the second hook are located on opposite sides of the ribs and extend back to back.

10. The battery assembly of the electric device according to claim 8, characterized in that, The wall also includes a retaining wall disposed on the outside of the plurality of wall piers, and the battery body is located on the inside of the plurality of wall piers.

11. The battery assembly of the electric device according to claim 10, characterized in that, The periphery of the handle cover is partially located in a recess between the retaining wall and the wall pier.

12. The battery assembly of the electric device according to claim 5, characterized in that, The handle cover includes a cover body, a handle, and a groove. The handle extends from the outside of the cover body, the groove is arranged around the inner wall of the cover body, and the two hooks are fastened to the groove.

13. The battery assembly of the electric device according to claim 2, characterized in that, It also includes thick and thin pads disposed on the end face of the battery body and clamped between the handle cover and the battery body.

14. The battery assembly of the electric device according to claim 13, characterized in that, The thick and thin pad includes a block one and a block two. The block two protrudes from the bottom of the block one to be embedded in the positioning port of the battery body located on the end face, and the block one is clamped between the end face and the cover of the handle cover so that the thick and thin pad is positioned on the end face.

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