Wireless charging devices and energy storage equipment

Abstract

The present application relates to a wireless charging device and an energy storage device. The wireless charging device is used for detachable connection with the host of the energy storage device, and the wireless charging device includes: a bracket, which is used for detachable connection with the host; and a charging mechanism, which includes a shell, a charging coil, a radiator and a heat conductor. The shell is provided with a receiving cavity, and the shell is rotatably connected to the bracket so that the shell can be stacked on the bracket, and the charging coil is accommodated in the receiving cavity; the radiator is located in the receiving cavity and stacked on the charging coil; the heat conductor abuts between the radiator and the charging coil. In view of the fact that the bracket of the wireless charging device is used for detachable connection with the host, when the charging coil in the wireless charging device fails and needs to be replaced, the entire wireless charging device can be directly uninstalled from the host, and a new wireless charging device can be installed on the host, thereby improving the convenience of maintenance of the entire energy storage device.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a wireless charging device and an energy storage device. Background Art

[0002] Energy storage devices can wirelessly charge electronic devices such as mobile phones through their wireless charging devices. This involves placing a coil at both the transmitting and receiving ends. The transmitting coil, under the influence of electricity, emits an electromagnetic signal to the outside world, which the receiving coil receives and converts into an electric current, thus achieving wireless charging. However, with traditional energy storage devices, when the coil of the wireless charging device fails and needs to be replaced, multiple components, including the device casing, must be disassembled, compromising the device's ease of maintenance. Summary of the Invention

[0003] One of the technical problems addressed by this application is how to improve the convenience of energy storage equipment maintenance.

[0004] A wireless charging device for detachably connecting to a host of an energy storage device, the wireless charging device comprising:

[0005] a bracket, the bracket being used for detachably connecting to the host;

[0006] A charging mechanism includes a shell, a charging coil, a radiator and a heat conductor. The shell is provided with a receiving cavity, and the shell is rotatably connected to the bracket so that the shell can be superimposed on the bracket. The charging coil is accommodated in the receiving cavity; the radiator is located in the receiving cavity and superimposed on the charging coil; the heat conductor abuts between the radiator and the charging coil.

[0007] In one embodiment, the bracket includes a base and a connecting base, one end of the connecting base is rotatably connected to the shell, and the other end of the connecting base is rotatably connected to the base, the axis around which the connecting base rotates relative to the shell and the axis around which the connecting base rotates relative to the base are parallel to each other, and along the thickness direction of the charging mechanism, the base, the connecting base and the charging mechanism can be stacked on each other.

[0008] In one embodiment, the connecting seat has a connecting cavity, the shell also has a first wire hole connecting the accommodating cavity and the connecting cavity, and the base has a second wire hole connecting the connecting cavity. The wire used to connect to the charging coil is passed through the first wire hole, the connecting cavity and the second wire hole.

[0009] In one embodiment, the bracket further includes a damping shaft, and the connecting seat is rotatably connected to the shell and the base respectively through different damping shafts.

[0010] In one embodiment, the bracket further includes a driving circuit board and a contact connector. The driving circuit board is arranged on the base, and the contact connector is arranged on the circuit board and is used for elastic abutment against the host.

[0011] In one embodiment, the outer surface of the shell includes a bottom surface and a side surface that are connected to each other, the side surface is arranged around the bottom surface and the charging coil, the radiator is arranged on the side of the charging coil close to the bottom surface, and the orthographic projection of the bottom surface in the thickness direction of the charging mechanism covers the radiator.

[0012] In one embodiment, a first convection hole communicating with the accommodating cavity is formed on the bottom surface, and a second convection hole communicating with the accommodating cavity is formed on the side surface.

[0013] In one embodiment, the charging mechanism further includes a magnetic component, and the magnetic component is located in the accommodating cavity.

[0014] In one embodiment, the shell includes a bottom shell and a top cover, the bottom shell encloses the accommodating cavity and is connected to the bracket, and the top cover is detachably connected to the bottom shell and covers the accommodating cavity.

[0015] In one embodiment, the outer surface of the shell includes a side circumferential surface arranged around the charging coil, and a recessed groove is formed on the side circumferential surface.

[0016] An energy storage device comprises a host and any one of the wireless charging devices described above, wherein the bracket is detachably connected to the host.

[0017] In one embodiment, the host includes a casing, an outer surface of the casing is recessed to form an open cavity, the bracket is fixed in the open cavity, and when the shell is stacked on the bracket, the wireless charging device can be completely accommodated in the open cavity.

[0018] One technical effect of one embodiment of the present application is that, since the wireless charging device's bracket is detachably connected to the host, if the charging coil within the wireless charging device fails and needs to be replaced, the entire wireless charging device can be simply removed from the host and a new wireless charging device can be installed on the host, without having to disassemble other components within the host. This improves the convenience of maintaining the entire energy storage device. Furthermore, the housing can be stacked on the bracket, which can reduce the size of the wireless charging device and improve the portability and storage convenience of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an energy storage device provided by an embodiment when the wireless charging device is in a folded state.

[0020] Figure 2 for Figure 1 The diagram shows the three-dimensional structure of the energy storage device when the wireless charging device is in the unfolded state.

[0021] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the energy storage device shown.

[0022] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the wireless charging device in the energy storage device when it is in a folded state.

[0023] Figure 5 for Figure 4 The figure shows a schematic diagram of the three-dimensional structure of the wireless charging device in the unfolded state.

[0024] Figure 6 for Figure 4 The figure shows a schematic three-dimensional cross-sectional structure of the wireless charging device in the unfolded state.

[0025] Figure 7 for Figure 4 A schematic three-dimensional cross-sectional structural diagram of the charging mechanism in the wireless charging device shown.

[0026] Figure 8 for Figure 4 A first exemplary exploded structural diagram of a wireless charging device is shown.

[0027] Figure 9 for Figure 4 A second example exploded structural diagram of a wireless charging device is shown.

[0028] Figure 10 for Figure 4 A third exemplary exploded structural diagram of a wireless charging device is shown.

[0029] Figure 1: Energy storage device 10, host 11, housing 111, open cavity 1111, avoidance groove 1112, wireless charging device 12, charging mechanism 200, housing 210, bottom shell 211, accommodating cavity 2111, bottom surface 2112, first convection hole 2112a, side surface 2113, sink 2113a, second convection hole 2113b, first wire hole 2114, top cover 212, charging coil 220, radiator 230, heat conductor 240, magnetic member 250, bracket 300, base 310, second wire hole 311, connecting seat 320, connecting cavity 321, first rotating shaft 331, second rotating shaft 332, damping shaft 340, driving circuit board 350, contact connector 360. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0036] See Figure 1 、 Figure 2 、 Figure 3 and Figure 6In one embodiment of the present application, an energy storage device 10 is provided, which includes a host 11 and a wireless charging device 12. The wireless charging device 12 includes a bracket 300 and a charging mechanism 200. The host 11 includes a housing 111 and a power supply, which is disposed in the housing 111. The bracket 300 is detachably connected to the housing 111. For example, the bracket 300 and the housing 111 can be bolted or detachably connected by a snap connection. The charging mechanism 200 includes a shell 210 and a charging coil 220. The shell 210 is provided with a receiving cavity 2111. The shell 210 is rotatably connected to the bracket 300, so that the shell 210 can be stacked on the bracket 300, thereby placing the charging mechanism 200 in a folded state. When the shell 210 is rotated relative to the bracket 300 at a certain angle from the folded state, the charging mechanism 200 is placed in an unfolded state. The charging coil 220 is housed in the receiving cavity 2111, and the charging coil 220 is electrically connected to the power supply in the host 11. When an electronic device such as a mobile phone is placed on the housing 210 , the charging coil 220 can wirelessly charge the mobile phone.

[0037] If the charging coil 220 is disposed inside the housing 111 , when the charging coil 220 fails and needs to be replaced, other components inside the housing 111 need to be disassembled. This makes the replacement of the charging coil 220 time-consuming and laborious, thereby affecting the convenience of maintaining the energy storage device 10 .

[0038] As for the energy storage device 10 in the above embodiment, since the bracket 300 of the wireless charging device 12 is detachably connected to the housing 111, when the charging coil 220 in the wireless charging device 12 fails and needs to be replaced, the entire wireless charging device 12 can be directly removed from the housing 111 and a new wireless charging device 12 can be installed on the housing 111. In this way, there is no need to disassemble the housing 111 and other components, thereby improving the convenience of maintenance of the entire energy storage device 10.

[0039] See Figure 4 、 Figure 5 and Figure 6In some embodiments, the housing 210 includes a bottom shell 211 and a top cover 212. The bottom shell 211 defines a receiving cavity 2111. The top cover 212 is detachably connected to the bottom shell 211, so that the top cover 212 serves as a cover for the receiving cavity 2111. The top cover 212 and the bottom shell 211 can be detachably connected by a snap connection. The bottom shell 211 is rotatably connected to the bracket 300, and the top cover 212 is used to support a mobile phone. When the mobile phone is supported on the top cover 212, the electromagnetic waves generated by the charging coil 220 can be received by the coil inside the mobile phone through the top cover 212, thereby enabling wireless charging of the mobile phone by the charging coil 220. The top cover 212 is relatively thin, for example, the thickness of the top cover 212 can be less than 3 mm, and the top cover 212 has sufficient structural strength to effectively support the mobile phone and prevent deformation of the top cover 212.

[0040] If charging coil 220 is placed within housing 111, the thickness of housing 111 must meet fire protection and structural strength requirements. Therefore, the thickness is relatively large, typically exceeding 3 mm. During charging, the phone rests on the outer surface of housing 111, and the electromagnetic waves generated by charging coil 220 pass through the thicker housing 111 to be received by the phone, effectively charging the phone. However, the thickness of housing 111 places charging coil 220 relatively far from the phone, increasing the propagation distance of the electromagnetic waves and thus affecting the charging efficiency of charging coil 220.

[0041] In the energy storage device 10 of the aforementioned embodiment, the charging coil 220 is disposed within the charging mechanism 200 and is received by the mobile phone through the relatively thin top cover 212. Due to the thin top cover 212, the charging coil 220 is relatively close to the mobile phone, reducing the propagation distance of electromagnetic waves and thereby improving the charging efficiency of the mobile phone.

[0042] See Figure 6 、 Figure 7 and Figure 8In some embodiments, the charging mechanism 200 further includes a heat sink 230 and a heat conductor 240. The outer surface of the bottom housing 211 includes a bottom surface 2112 and a side peripheral surface 2113. The orthographic projection of the bottom surface 2112 in the thickness direction of the charging mechanism 200 covers the heat sink 230. This can be understood as the heat sink 230 and the bottom surface 2112 being arranged along the thickness direction of the charging mechanism 200. The side peripheral surface 2113 is connected to the periphery of the bottom surface 2112, so that the side peripheral surface 2113 is arranged around the bottom surface 2112 and the side peripheral surface 2113 is arranged around the accommodating cavity 2111. Therefore, the side peripheral surface 2113 is arranged around the charging coil 220, the heat sink 230, and the heat conductor 240. The thermal conductor 240 can be made of a material with a high thermal conductivity. Both sides of the thermal conductor 240 along its thickness have adhesive properties, thus functioning as double-sided tape. The thermal conductor 240 is stacked between the charging coil 220 and the heat sink 230. The thermal conductor 240 is located on the side of the charging coil 220 closer to the bottom surface 2112. Consequently, the heat sink 230 is also located on the side of the charging coil 220 closer to the bottom surface 2112. In other words, the thermal conductor 240 and the heat sink 230 are closer to the bottom surface 2112 relative to the charging coil 220. It will be appreciated that during charging, when the temperature of the charging coil 220 is below a critical value, the charging coil 220 can charge the mobile phone at full power. However, as the charging coil 220 continues to operate, causing its temperature to rise above the critical value, the charging coil 220 will charge the mobile phone at a limited power level, which is less than full power. This will affect the time it takes to fully charge the mobile phone, thereby reducing charging efficiency.

[0043] In view of the fact that the radiator 230 and the heat conductor 240 are provided, when the charging coil 220 charges the mobile phone, the heat generated by the charging coil 220 can be quickly transferred to the radiator 230 through the heat conductor 240, so that the radiator 230 can effectively dissipate heat and cool the charging coil 220, thereby ensuring that the temperature of the charging coil 220 is always lower than the critical temperature, ensuring that the charging coil 220 can always maintain a relatively large full power value to charge the mobile phone, thereby reducing the time it takes to fully charge the mobile phone, thereby improving the charging efficiency of the wireless charging device 12.

[0044] See Figure 6 、 Figure 7 and Figure 8In some embodiments, a first convection hole 2112a is provided on the bottom surface 2112, and the number of the first convection holes 2112a is multiple, and the first convection holes 2112a connect the outside and the accommodating cavity 2111; a second convection hole 2113b is provided on the side surface 2113, and the number of the second convection holes 2113b is multiple, and the second convection holes 2113b connect the outside and the accommodating cavity 2111. By providing the first convection holes 2112a and the second convection holes 2113b, the gas and heat in the accommodating chamber 2111 are convectively transported through the first convection holes 2112a and the second convection holes 2113b. This ensures that the heat discharged from the radiator 230 into the accommodating chamber 2111 can be quickly discharged through the first convection holes 2112a or the second convection holes 2113b, thereby cooling the radiator 230. This further improves the heat dissipation effect of the radiator 230 on the charging coil 220 and further improves the charging efficiency of the wireless charging device 12.

[0045] See Figure 6 、 Figure 7 and Figure 8 In some embodiments, the charging mechanism 200 further includes a magnetic member 250, which is located within the accommodating cavity 2111. For example, the magnetic member 250 and the charging coil 220 are both disposed on the same surface of the heat conductive member 240, so that the magnetic member 250 can be disposed around the charging coil 220. When a mobile phone is placed on the top cover 212, the magnetic member 250 generates a magnetic attraction force on the mobile phone, so that the mobile phone is fixed to the top cover 212 by the action of the magnetic attraction force, thereby achieving a detachable connection between the mobile phone and the top cover 212. When the wireless charging device 12 is in the unfolded state, the charging mechanism 200 secures the mobile phone through the magnetic attraction force, effectively preventing the mobile phone from sliding off the top cover 212 under the action of gravity and external impact, resulting in failure to charge. This improves the reliability of the wireless charging device 12 in charging the mobile phone.

[0046] See Figure 1 、 Figure 2 and Figure 6In some embodiments, an open cavity 1111 is formed in a recessed shape on the outer surface of the housing 111, and the bracket 300 is secured within the open cavity 1111. When the housing 210 is stacked on the bracket 300, the wireless charging device 12 is folded and fully contained within the open cavity 1111. This allows the wireless charging device 12 to be concealed within the housing 111, thereby improving the overall appearance consistency of the energy storage device 10. Furthermore, during the transportation and storage of the energy storage device 10, interference and collision between the wireless charging device 12 exposed outside the housing 111 and external objects can be avoided, preventing damage to the wireless charging device 12 and improving the convenience and safety of carrying and storing the energy storage device 10. Furthermore, when the wireless charging device 12 is fully contained within the open cavity 1111, the surface of the top cover 212 can be flush with the surface of the housing 111, further improving the overall appearance consistency of the energy storage device 10. When charging a mobile phone, the charging mechanism 200 can be rotated relative to the bracket 300 to a certain angle, so that the top cover 212 of the charging mechanism 200 is located within the open cavity 1111, allowing the mobile phone to be fixed on the top cover 212 for charging. Of course, during the charging and non-charging process, the wireless charging device 12 can be kept in the unfolded state, and the angle of the charging mechanism 200 relative to the bracket 300 can be appropriately adjusted to keep the mobile phone at a reasonable angle relative to the user's line of sight, making it easier for the user to view the content displayed on the mobile phone screen. In this case, the wireless charging device 12 acts as a fixed frame for supporting the mobile phone.

[0047] See Figure 2 、 Figure 6 and Figure 9 In some embodiments, the outer surface of the housing 111 may further include a relief groove 1112, which communicates with the open cavity 1111. The side surface 2113 of the bottom housing 211 may also be recessed to form a recessed groove 2113a. When the housing 210 is folded and stored in the open cavity 1111, the recessed groove 2113a may communicate with the relief groove 1112. When the housing 210 needs to be rotated so that the charging mechanism 200 is outside the open cavity 1111, the user's finger can reach the recessed groove 2113a through the relief groove 1112, thereby facilitating the application of force to the housing 210 and improving the convenience of using the wireless charging device 12.

[0048] See Figure 8 、 Figure 9 and Figure 10In some embodiments, the bracket 300 includes a base 310, a connecting base 320, a first rotating shaft 331, and a second rotating shaft 332. One end of the connecting base 320 is rotatably connected to the bottom shell 211 of the housing 210 via the first rotating shaft 331. For example, the first rotating shaft 331 can be fixed to the connecting base 320 by a snap connection, and the first rotating shaft 331 is rotatably inserted into the bottom shell 211, thereby achieving a rotatable connection between one end of the connecting base 320 and the bottom shell 211. The other end of the connecting base 320 is rotatably connected to the base 310 via the second rotating shaft 332. For example, the second rotating shaft 332 can be fixed to the connecting base 320 by a snap connection, and the second rotating shaft 332 is rotatably inserted into the base 310, thereby achieving a rotatable connection between one end of the connecting base 320 and the base 310. The axis about which the connecting base 320 rotates relative to the housing 210 is the central axis of the first rotation axis 331, and the axis about which the connecting base 320 rotates relative to the base 310 is the central axis of the second rotation axis 332. The central axes of the first rotation axis 331 and the second rotation axis 332 are parallel to each other. By including a rotatably connected base 310 and connecting base 320 in the bracket 300, the base 310, connecting base 320, and charging mechanism 200 can be stacked together along the thickness direction of the charging mechanism 200. Therefore, when the wireless charging device 12 is in the folded state, the base 310, connecting base 320, and charging mechanism 200 can be stacked together, thereby reducing the volume occupied by the wireless charging device 12, allowing the folded wireless charging device 12 to be accommodated within the open cavity 1111 of the housing 111.

[0049] See Figure 8 、 Figure 9 and Figure 10 The connecting seat 320 is rotatably connected between the bottom shell 211 and the base 310. When the mobile phone is placed on the top cover 212, the connecting seat 320 is rotated relative to the bottom shell 211 and the base 310. On the one hand, the height of the mobile phone relative to the surface of the casing 111 can be adjusted, and on the other hand, the angle of the mobile phone relative to the surface of the casing 111 can be adjusted. In this way, the mobile phone can present different angles relative to the casing 111 at different heights, thereby increasing the diversity of the position of the mobile phone relative to the casing 111 and ultimately improving the user experience.

[0050] See Figure 8 、 Figure 9 and Figure 10In some embodiments, the bracket 300 further includes a damping shaft 340. The damping shafts 340 may be two in number, each fixedly connected to opposite ends of the connecting base 320, for example, by bolts. One end of the connecting base 320 is rotatably connected to the bottom shell 211 via one of the damping shafts 340. The damping shaft 340 and the first rotating shaft 331 may be inserted into the same rotating hole in the bottom shell 211. Another end of the connecting base 320 is rotatably connected to the bottom shell 211 via another damping shaft 340. The damping shaft 340 and the second rotating shaft 332 may be inserted into the same rotating hole in the base 310. The provision of the damping shafts 340 effectively retains the connecting base 320 when it rotates relative to the bottom shell 211 and the base 310. Once the connecting base 320 rotates to a set angle, it remains stably and reliably in that position.

[0051] See Figure 8 、 Figure 9 and Figure 10 In some embodiments, the connection base 320 has a hollow structure, so the cavity within the connection base 320 can be referred to as a connecting cavity 321. A first wire-passing hole 2114 can be defined within the bottom shell 211, connecting the accommodating cavity 2111 and the connecting cavity 321. A second wire-passing hole 311 can be defined within the base 310, connecting the second wire-passing hole 311 and the connecting cavity 321. After the wire is connected to the charging coil 220, it can be sequentially threaded through the first wire-passing hole 2114, the connecting cavity 321, and the second wire-passing hole 311. This allows the wire to be hidden within the shell 210, the connection base 320, and the base 310, achieving internalization of the wire. It will be appreciated that the first rotating shaft 331 also has a hollow structure within it, connecting the accommodating cavity 2111 and the connecting cavity 321, allowing the wire to pass through the accommodating cavity 2111 and the hollow structure into the connecting cavity 321.

[0052] See Figure 8 、 Figure 9 and Figure 10 In some embodiments, the bracket 300 further includes a driver circuit board 350 and a contact connector 360. The driver circuit board 350 is disposed on the base 310. For example, the driver circuit board 350 can be fixed to the base 310 by bolts. The contact connector 360 is disposed on the circuit board, and a wire is electrically connected to the contact connector 360. The contact connector 360 is configured to abut against a power source. In this way, the power source supplies power to the charging coil 220 through the contact connector 360 and the wire, so that the charging coil 220 can charge the mobile phone. The contact connector 360 elastically abuts against the host 11, thereby achieving a detachable connection between the base 310 and the housing 111.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An energy storage device, comprising a host and a wireless charging device, wherein the host includes a power supply, characterized in that: The wireless charging device comprises: A bracket, the bracket being used for detachable connection with the host; A charging mechanism comprising a housing, a charging coil, a heat sink, and a heat conductor, wherein the housing defines a receiving cavity and is rotatably connected to the bracket so as to be stacked on the bracket, the charging coil being accommodated in the receiving cavity; the heat sink being located in the receiving cavity and stacked on the charging coil; and the heat conductor being abutted between the heat sink and the charging coil; The bracket includes a base, a driving circuit board and a contact connector. The base is detachably connected to the host. The driving circuit board is arranged on the base. The contact connector is arranged on the circuit board and is used to abut against the power supply.

2. The energy storage device according to claim 1, characterized in that The bracket also includes a connecting seat, one end of the connecting seat is rotatably connected to the shell, and the other end of the connecting seat is rotatably connected to the base. The axis around which the connecting seat rotates relative to the shell and the axis around which the connecting seat rotates relative to the base are parallel to each other. Along the thickness direction of the charging mechanism, the base, the connecting seat and the charging mechanism can be stacked on each other.

3. The energy storage device according to claim 2, characterized in that The connecting seat has a connecting cavity, and the shell also has a first wire hole connecting the accommodating cavity and the connecting cavity. The base has a second wire hole connecting the connecting cavity. The wire used to connect to the charging coil is passed through the first wire hole, the connecting cavity and the second wire hole.

4. The energy storage device according to claim 2, characterized in that The bracket also includes a damping shaft, and the connecting seat is rotatably connected to the shell and the base respectively through different damping shafts.

5. The energy storage device according to claim 1, characterized in that Both sides of the heat conducting member in the thickness direction have a bonding function.

6. The energy storage device according to claim 1, characterized in that The outer surface of the shell includes a bottom surface and a side surface that are connected to each other. The side surface is arranged around the bottom surface and the charging coil. The radiator is arranged on the side of the charging coil close to the bottom surface. The orthographic projection of the bottom surface in the thickness direction of the charging mechanism covers the radiator.

7. The energy storage device according to claim 6, characterized in that A first convection hole communicating with the accommodating cavity is formed on the bottom surface, and a second convection hole communicating with the accommodating cavity is formed on the side circumferential surface.

8. The energy storage device according to claim 1, characterized in that The charging mechanism further includes a magnetic component, and the magnetic component is located in the accommodating cavity.

9. The energy storage device according to claim 1, characterized in that The housing includes a bottom shell and a top cover. The bottom shell surrounds the accommodating cavity and is connected to the bracket. The top cover is detachably connected to the bottom shell and covers the accommodating cavity.

10. The energy storage device according to claim 9, characterized in that: The outer surface of the shell includes a side circumferential surface arranged around the charging coil, and a recessed groove is formed on the side circumferential surface.

11. The energy storage device according to claim 1, characterized in that The host comprises a casing, an outer surface of the casing is recessed to form an open cavity, the bracket is fixed in the open cavity, and when the shell is stacked on the bracket, the wireless charging device can be completely accommodated in the open cavity.

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