Battery charger that can be used as a power bank

Abstract

This application provides a battery charger that can be used as a power bank, comprising a body assembly and an electrical assembly. The body assembly includes a battery positioning slot extending along a first direction. The battery positioning slot is used to accommodate either AA or AAA type batteries at different times. The electrical assembly includes electrode members, an interface member, and a selector switch. The electrode member includes a positive terminal and a negative terminal. The positive terminal is located at one end of the battery positioning slot along the first direction, and the negative terminal is located at the other end of the battery positioning slot along the first direction. The interface member is electrically connected to the electrode member. The selector switch is connected in series between the interface member and the electrode member. The selector switch is configured to change the electrical connection state of the interface member and the electrode member when operated, thereby switching the battery charger between a charging mode and a discharging mode. This application can realize both the function of a battery charger and the function of a battery power bank.

Description

Technical Field

[0001] This application relates generally to the technical field of batteries, and more specifically to a battery charger that can be used as a power bank. Background Technology

[0002] In recent years, rechargeable batteries have been widely used in various portable electrical and electronic devices, such as toys and handheld devices, which places increasingly higher demands on the energy storage capacity of rechargeable batteries. In particular, lithium-ion rechargeable batteries are gradually being used in these fields due to their advantages such as high energy density, high-power discharge capability, and environmental friendliness.

[0003] The battery chargers in related technologies have relatively limited functions; they can only be used to charge rechargeable batteries and cannot be used as power banks.

[0004] Therefore, there is a need to provide a battery charger that can be used as a power bank to at least partially solve the above problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this application provides a battery charger that can be used as a power bank, the battery charger comprising:

[0007] The body assembly includes a battery positioning groove extending along a first direction, the battery positioning groove being used to accommodate one of an AA battery and an AAA battery at different times; and

[0008] Electrical components, the electrical components including:

[0009] An electrode component, comprising a positive electrode portion and a negative electrode portion, wherein the positive electrode portion is located at one end of the battery positioning groove along the first direction, and the negative electrode portion is located at the other end of the battery positioning groove along the first direction;

[0010] An interface component, the interface component being electrically connected to the electrode component; and

[0011] A selector switch is connected in series between the interface component and the electrode component. The selector switch is configured to change the electrical connection state of the interface component and the electrode component when operated, so that the battery charger switches between a charging mode and a discharging mode.

[0012] According to this application, a battery charger that can be used as a power bank is provided. A battery positioning groove is provided in the main body assembly to selectively accommodate either AA or AAA type batteries. A positive and negative electrode portion in the electrode component is provided at both ends of the battery positioning groove to form an electrical connection with the positive and negative terminals of the battery. An interface component is provided that is electrically connected to the electrode component to enable electrical connection between the battery charger and an external power source or electrical device. A switch is provided in the interface component and the electrode component to change the electrical connection state of the interface component and the electrode component when operated, allowing the battery charger to switch between charging and discharging modes. Therefore, the battery charger can function as both a battery charger and a power bank.

[0013] Optionally, the battery positioning groove includes a first groove and a second groove, wherein the first groove is used to accommodate AA type batteries and the second groove is used to accommodate AAA type batteries.

[0014] The projection of the second groove onto a projection plane perpendicular to a third direction is completely within the projection of the first groove onto that projection plane. The third direction is parallel to the orientation of the opening of the battery positioning groove and perpendicular to the first direction.

[0015] Optionally, the body assembly includes at least two battery positioning slots, which are arranged at intervals along a second direction perpendicular to the first direction, and each battery positioning slot is provided with an electrode component.

[0016] Optionally, the first groove and the second groove intersect at their corresponding ends along the first direction, and the positive electrode portion is correspondingly disposed at the intersection of the first groove and the second groove;

[0017] The negative electrode portion includes a first negative electrode portion and a second negative electrode portion, wherein

[0018] The first negative electrode portion is disposed at the end of the first groove portion opposite to the positive electrode portion along the first direction, and is used to contact the negative electrode of the AA type battery;

[0019] The second negative electrode portion is disposed at the end of the second groove portion opposite to the positive electrode portion along the first direction, and is used to contact the negative electrode of the AAA type battery.

[0020] The projections of the second negative electrode portion and the first groove portion onto a projection plane perpendicular to the first direction are offset from each other in the third direction.

[0021] Optionally, the changeover switch includes:

[0022] At least two self-locking switches that are parallel to each other;

[0023] A button, connected to each of the self-locking switches, is used to be pressed to change the electrical connection state of each self-locking switch.

[0024] Optionally, the changeover switch further includes:

[0025] At least two connectors are connected one-to-one to each of the self-locking switches, and the connectors are connected to the buttons;

[0026] At least two springs are sleeved on the outside of the connector and located between the button and the self-locking switch. The springs are used to apply a force to the button in a direction away from the self-locking switch.

[0027] Optionally, the electrical component further includes at least one of a charging indicator and a discharging indicator, the charging indicator being electrically connected to the changeover switch and configured to indicate the charging status of the battery when the battery charger is in charging mode, and the discharging indicator being electrically connected to the changeover switch and configured to indicate the discharging status of the battery when the battery charger is in discharging mode.

[0028] Optionally, the body assembly includes a battery compartment and a bottom cover, the battery compartment having the battery positioning groove, the bottom cover being connected to the battery compartment, a receiving cavity being formed between the bottom cover and the battery compartment, and the opening of the battery positioning groove facing away from the receiving cavity;

[0029] The electrical components also include a circuit board located in the receiving cavity, and the changeover switch, the charging indicator light, and the discharging indicator light are electrically connected to the circuit board.

[0030] Optionally, the battery compartment is provided with a charging light-transmitting part and a discharging light-transmitting part on the part opposite to the bottom cover.

[0031] The main body component also includes a charging light guide column and a discharging light guide column. The charging light guide column is connected between the charging light-transmitting part and the charging indicator light, and the discharging light guide column is connected between the discharging light-transmitting part and the discharging indicator light.

[0032] Optionally, the body assembly includes a battery compartment with a battery positioning groove. The battery compartment includes a positive end wall facing the battery positioning groove. The positive end wall has a positive electrode groove. The opening of the positive electrode groove points into the groove of the battery positioning groove along the first direction. The dimension of the opening of the positive electrode groove along the second direction is larger than the radial outer dimension of the positive electrode post of an AA battery, and the dimension of the opening of the positive electrode groove along the second direction is smaller than the radial outer dimension of an AAA battery. The positive electrode portion is located in the positive electrode groove and does not extend beyond the positive end wall along the first direction, which is perpendicular to the second direction.

[0033] Optionally, the positive electrode portion, the first negative electrode portion, and the second negative electrode portion are constructed as structures capable of elastic deformation;

[0034] The body assembly has a first negative end wall and a second negative end wall. The first negative end wall is further away from the positive end wall than the second negative end wall along the first direction. A first recess groove for accommodating the first negative end portion is formed in the portion of the first negative end wall corresponding to the first negative end portion. A second recess groove for accommodating the second negative end portion is formed in the portion of the second negative end wall corresponding to the second negative end portion.

[0035] Optionally, the positive electrode portion is configured as a positive electrode metal sheet, the positive electrode metal sheet including a first positive electrode protrusion and a second positive electrode protrusion extending toward the battery positioning groove in the first direction, the positive electrode metal sheet being configured such that:

[0036] The first positive electrode protrusion contacts the positive electrode of the AA type battery located in the positive electrode groove, and the first positive electrode protrusion and the second positive electrode protrusion together contact the positive electrode of the AAA type battery located in the positive electrode groove.

[0037] Optionally, the first negative electrode portion is configured as a first negative electrode spring, the first negative electrode spring including a first support segment and a first bending segment, the first support segment extending in a third direction, the first bending segment being connected to the end of the first support segment, the curvature center of the first bending segment being located between the first bending segment and the first support segment, and the first bending segment being used to abut against the negative electrode of the AA type battery.

[0038] Optionally, the free end of the first bending segment is spaced apart from the first support segment.

[0039] Optionally, the second negative electrode portion is configured as a second negative electrode spring, the second negative electrode spring including a second bent segment and a third bent segment connected in sequence, the curvature center of the second bent segment is located on the side of the second bent segment near the center of the second groove portion along the first direction, and the curvature center of the third bent segment is located on the side of the third bent segment opposite to the center of the second groove portion along the first direction.

[0040] Optionally, the second and third bending segments generally form an S-shaped bending structure.

[0041] Optionally, the electrical component further includes a circuit board, the electrode component is connected to the circuit board, the circuit board and / or the battery compartment are provided with a clearance hole, the second bent segment is movably inserted through the clearance hole, the size of the clearance hole along the first direction is greater than the size of the second bent segment along the first direction, and the size of the clearance hole along the first direction is less than the sum of the sizes of the second bent segment and the third bent segment along the first direction.

[0042] Optionally, the body assembly includes a battery compartment and a bottom cover, the battery compartment having the battery positioning groove, the bottom cover being connected to the battery compartment, a receiving cavity being formed between the bottom cover and the battery compartment, and the opening of the battery positioning groove facing away from the receiving cavity;

[0043] The electrical component also includes a circuit board located in the receiving cavity, and the electrode member is connected to the circuit board.

[0044] Optionally, the body assembly includes a battery compartment, a bottom cover, and a top cover. The battery compartment has the battery positioning groove, the bottom cover is connected to the battery compartment, and the top cover is operably connected to the battery compartment.

[0045] Optionally, the face cover has a first handle, and one of the bottom cover and the battery compartment has a second handle. The second handle is correspondingly disposed to the first handle, and the projections of the second handle and the first handle onto a plane perpendicular to a third direction are at least partially offset. The third direction is parallel to the orientation of the slot of the battery positioning groove. The first handle and the second handle are used to be operated to open the face cover.

[0046] Optionally, at least one of the bottom cover and the battery compartment is provided with a handle groove, the handle groove being disposed corresponding to the first handle along the third direction, and the handle groove being used to cooperate with the first handle to open the top cover.

[0047] Optionally, the face cover has a first snap-fit ​​portion, and at least one of the battery compartment and the bottom cover is provided with a second snap-fit ​​portion. The second snap-fit ​​portion is arranged corresponding to the first snap-fit ​​portion and is used to snap onto the first snap-fit ​​portion. The second snap-fit ​​portion is spaced around the outer periphery of the bottom cover.

[0048] Optionally, the first latch and the second latch are located between adjacent first and second locking portions.

[0049] Optionally, the body component includes a light guide, which is constructed to be transparent or semi-transparent, and includes the first negative end wall.

[0050] Optionally, the changeover switch further includes a balancer connected between the button and the connector, and the balancer abuts against each of the springs. Attached Figure Description

[0051] The following drawings, illustrating embodiments of this application, are incorporated herein by reference and are used to understand this application. The drawings illustrate embodiments of this application and their descriptions, serving to explain the principles of this application. In the drawings,

[0052] Figure 1 A perspective view of a battery charger that can be used as a power bank according to a preferred embodiment of this application;

[0053] Figure 2 for Figure 1 An exploded view of a battery charger that can be used as a power bank;

[0054] Figure 3 for Figure 2 An enlarged view of point I in the image;

[0055] Figure 4 for Figure 2 An enlarged view of point II in the image;

[0056] Figure 5 for Figure 2 Enlarged view of point III in the image;

[0057] Figure 6 for Figure 2 A schematic diagram showing the connection between the electrical components and the battery;

[0058] Figure 7 for Figure 2 A perspective view of the electrical components shown;

[0059] Figure 8 for Figure 2 A top view of the electrical components shown;

[0060] Figure 9for Figure 1 The battery charger shown can be used as a power bank, top view after removing the front cover;

[0061] Figure 10 For along Figure 9 The sectional view cut by line AA in the middle;

[0062] Figure 11 for Figure 10 An enlarged view of point IV in the image;

[0063] Figure 12 for Figure 1 and Figure 2 A perspective view of the cover shown;

[0064] Figure 13 for Figure 1 The battery charger shown is a top view of the device after removing the cover and installing the batteries, which can be used as a power bank. The two batteries on the left are reversed, and the two batteries on the right are correctly installed.

[0065] Figure 14 For along Figure 13 The sectional view cut by line BB in the middle;

[0066] Figure 15 for Figure 1 The diagram shows a top view of a battery charger that can be used as a power bank; and

[0067] Figure 16 For along Figure 15 The sectional view cut by line CC in the middle.

[0068] Explanation of reference numerals in the attached figures:

[0069] 1: AA type battery 1a: Positive terminal

[0070] 2: AAA type battery 100: Main body assembly

[0071] 101: Battery compartment 101a: First slot

[0072] 101b: Second groove section; 101c: Positive end wall

[0073] 101d: Positive electrode groove; 101e: Second negative electrode end wall

[0074] 101f: Second recessed groove; 101g: Second locking part

[0075] 101s: Light-transmitting part during charging; 101t: Light-transmitting part during discharging.

[0076] 102: Faceplate 102a: First latch

[0077] 102b: First snap-fit ​​part; 103: Bottom cover

[0078] 103a: Second buckle 103b: Buckle groove

[0079] 104: Light guide element 104a: First negative end wall

[0080] 104b: First relief groove; 105: Receiving cavity

[0081] 200: Electrical components; 210: Electrode components

[0082] 212: Positive electrode portion; 212a: First positive electrode protrusion

[0083] 212b: Second positive electrode protrusion; 213: First negative electrode portion

[0084] 213a: First support section; 213b: First bending section

[0085] 213c: First negative electrode protrusion; 213d: First connecting segment

[0086] 215: Second negative electrode section; 215a: Second connecting section

[0087] 215b: Second bend section; 215c: Third bend section

[0088] 220: Interface component; 230: Changeover switch

[0089] 231: Self-locking switch; 232: Connector

[0090] 233: Button; 234: Balance component

[0091] 235: Spring; 251: Charging light guide column

[0092] 252: Discharge light guide column; 261: Charging indicator light.

[0093] 262: Discharge indicator light; 270: Circuit board

[0094] 270a: Clearance hole D1: First direction

[0095] D2: Second direction D3: Third direction Detailed Implementation

[0096] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0097] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art.

[0098] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0099] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0100] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0101] This application provides a battery charger that can be used as a power bank. The battery charger can charge batteries and can also output power as a power bank when batteries are installed.

[0102] The following reference Figures 1 to 16 The example shown provides a detailed description of a battery charger that can be used as a power bank according to this application.

[0103] The battery charger that can be used as a power bank according to this application may include a body component 100 and an electrical component 200.

[0104] The main body assembly 100 may include a battery positioning slot extending along a first direction D1. The length direction of the battery positioning slot may be parallel to or substantially parallel to the first direction D1. Alternatively, the length direction of the battery positioning slot may be substantially aligned with the first direction D1. A measure of substantially being aligned is that the length direction of the battery positioning slot is not perpendicular to the first direction D1. The battery positioning slot is used to accommodate one of the AA type battery 2 and the AAA type battery 2 at different times. It is understood that the AA type battery 2 and the AAA type battery 2 are not placed in the battery positioning slot simultaneously. That is, only one type of AA type battery 2 and the AAA type battery 2 can be placed in the same battery positioning slot at a time.

[0105] Electrical component 200 may include electrode component 210, interface component 220, and changeover switch 230. Electrode component 210 may include a positive electrode portion 212 and a negative electrode portion. The positive electrode portion 212 is located at one end of the battery positioning groove along the first direction D1, and the negative electrode portion is located at the other end of the battery positioning groove along the first direction D1. That is, the positive electrode portion 212 and the negative electrode portion are located at opposite ends of the battery positioning groove along the first direction D1. Interface component 220 is electrically connected to electrode component 210. Changeover switch 230 is connected in series between interface component 220 and electrode component 210. Changeover switch 230 is configured to change the electrical connection state of interface component 220 and electrode component 210 when operated, so that the battery charger switches between charging mode and discharging mode.

[0106] According to the battery charger of this application, which can be used as a power bank, a battery positioning groove is provided in the body assembly 100 to selectively accommodate one of an AA-type battery 2 and an AAA-type battery 2. The positive electrode portion 212 and the negative electrode portion of the electrode member 210 are provided at both ends of the battery positioning groove to form an electrical connection by contacting the positive and negative terminals of the battery. An interface member 220 is electrically connected to the electrode member 210 to enable electrical connection between the battery charger and an external power source or electrical device. A changeover switch 230 is provided in the interface member 220 and the electrode member 210, which, when operated, can change the electrical connection state of the interface member 220 and the electrode member 210, allowing the battery charger to switch between charging and discharging modes, thus enabling the battery charger to function as both a battery charger and a power bank.

[0107] See Figure 2 , Figure 3 , Figures 9 to 11 , Figure 13 , Figure 14 as well as Figure 16For example, the battery positioning slot may include a first slot 101a and a second slot 101b. The first slot 101a is used to accommodate an AA-type battery 2. The second slot 101b is used to accommodate an AAA-type battery 2. Here, the first slot 101a and the second slot 101b extend along a first direction D1, or the first slot 101a and the second slot 101b extend substantially along the first direction D1. The projection of the second slot 101b onto a projection plane perpendicular to a third direction D3 is completely within the projection of the first slot 101a onto the projection plane. The third direction D3 is parallel to the orientation of the opening of the battery positioning slot and perpendicular to the first direction D1. Here, the third direction D3 can be understood as the height direction of the body assembly 100 when the body assembly 100 is placed on a horizontal support surface and the opening of the battery slot is arranged upwards.

[0108] By employing the aforementioned technical means, the first groove 101a and the second groove 101b are located at the same position in a projection plane perpendicular to the third direction D3. This not only ensures compatibility with batteries of different sizes and models but also improves the space utilization of the main body assembly 100 and helps to achieve miniaturization of the external dimensions of the battery charger.

[0109] Furthermore, the corresponding ends of the first groove 101a and the second groove 101b intersect along the first direction D1. A positive electrode portion 212 is correspondingly disposed at the intersection of the first groove 101a and the second groove 101b. The negative electrode portion includes a first negative electrode portion 213 and a second negative electrode portion 215. The first negative electrode portion 213 is correspondingly disposed at the end of the first groove 101a along the first direction D1 away from the positive electrode portion 212, and is used to contact the negative electrode of the AA-type battery 2. The second negative electrode portion 215 is correspondingly disposed at the end of the second groove 101b along the first direction D1 away from the positive electrode portion 212, and is used to contact the negative electrode of the AAA-type battery 2. The projections of the second negative electrode portion 215 and the first groove 101a onto a projection plane perpendicular to the first direction D1 are offset from each other in a third direction D3.

[0110] By employing the aforementioned technical means, when the AA-type battery 2 is housed in the first slot 101a, the positive electrode of the AA-type battery 2 contacts the positive electrode portion 212, and the negative electrode of the AA-type battery 2 contacts the first negative electrode portion 213. Correspondingly, when the AAA-type battery 2 is housed in the second slot 101b, the positive electrode of the AAA-type battery 2 contacts the positive electrode portion 212, and the negative electrode of the AAA-type battery 2 contacts the second negative electrode portion 215. It is understood that the AA-type battery 2 and the AAA-type battery 2 share the positive electrode portion 212, and the negative electrodes of the AA-type battery 2 and the AAA-type battery 2 are connected to different negative electrode portions respectively. This effectively improves the space utilization and compatibility of the battery positioning slot.

[0111] See Figure 2 , Figure 9 , Figure 13 as well as Figure 16 For example, the body assembly 100 may include at least two battery positioning slots. The at least two battery positioning slots are arranged at intervals along a second direction D2 perpendicular to the first direction D1. Each battery positioning slot is provided with an electrode member 210. For example, the body assembly 100 may include two, three, four, five, or other numbers of battery positioning slots.

[0112] By employing the aforementioned technical means, the battery capacity of the main body component 100 can be increased, meaning it can accommodate more batteries. This allows for the simultaneous charging of more batteries, or the combination of different numbers of batteries to achieve different power outputs.

[0113] In the illustrated example, the body component 100 includes four battery positioning slots.

[0114] See Figure 1 , Figure 2 , Figures 6 to 9 , Figure 13 as well as Figure 15 For example, the changeover switch 230 may include a self-locking switch 231 and a push-button 233. At least two self-locking switches 231 are provided. The at least two self-locking switches 231 are arranged parallel to or side-by-side. The push-button 233 is connected to each self-locking switch 231. The push-button 233 is used to be pressed to change the electrical connection state of each self-locking switch 231.

[0115] By employing the aforementioned technical means, pressing button 233 simultaneously changes the electrical connection state of each self-locking switch 231, thereby altering the connection relationship between the battery positioning slots and ultimately changing the battery charger's operating mode. For example, pressing button 233 for the first time converts the connection relationship between the battery positioning slots to series connection, placing the battery charger in discharge mode. In discharge mode, power can be supplied to external devices by connecting the battery charger to an external power source or rechargeable device. In this mode, batteries typically need to be inserted into each battery positioning slot; otherwise, a circuit cannot be formed. Pressing button 233 a second time converts the connection relationship between the battery positioning slots to parallel connection, placing the battery charger in charging mode. In charging mode, the batteries located in the battery positioning slots can be charged by connecting the battery charger to an external power source.

[0116] Continue reading Figure 1 , Figure 2 , Figures 6 to 9 , Figure 13 as well as Figure 15Furthermore, the changeover switch 230 may also include at least two connectors 232 and at least two springs 235. The at least two connectors 232 are connected one-to-one to each self-locking switch 231. The connectors 232 are connected to the button 233. The springs 235 are sleeved on the outside of the connectors 232 and are located between the button 233 and the self-locking switch 231. The springs 235 apply a force to the button 233 in a direction away from the self-locking switch 231. The self-locking switch 231 can be a conventional self-locking switch, such as a single-pole, single-control self-locking switch. The self-locking switch 231 is disposed inside the body assembly 100 and electrically connected to the circuit board 270. The connectors 232 connect the operating portions of each self-locking switch 231 to the button 233, so that the user-operable button 233 can be connected to the operating portion of the self-locking switch 231.

[0117] In the illustrated example, the number of springs 235 is the same as the number of self-locking switches 231. Each spring 235 is fitted onto the outside of its corresponding connector 232 in a one-to-one correspondence. That is, each self-locking switch 231 is equipped with a spring 235 to achieve rebound reset. Compared to having fewer springs 235 than self-locking switches 231, this results in a more balanced force on the button 233 during pressing and rebound reset, and also helps to improve the service life of each spring 235.

[0118] See Figure 2 , Figures 6 to 8 , Figure 10 as well as Figure 11 In addition, electrical component 200 may also include at least one of a charging indicator 261 and a discharging indicator 262. The charging indicator 261 is electrically connected to the changeover switch 230. The charging indicator 261 is configured to indicate the battery's charging status when the battery charger is in charging mode. The discharging indicator 262 is electrically connected to the changeover switch 230. The discharging indicator 262 is configured to indicate the battery's discharging status when the battery charger is in discharging mode.

[0119] By setting up charging indicator light 261 and discharging indicator light 262, users can easily judge the working status of the battery charger and whether the battery charger is working by intuitively judging from the light indications.

[0120] See Figure 1 , Figure 2 as well as Figures 6 to 16For example, the body assembly 100 may include a battery compartment 101 and a bottom cover 103. The battery compartment 101 has a battery positioning groove. The bottom cover 103 is connected to the battery compartment 101. A receiving cavity 105 is formed between the bottom cover 103 and the battery compartment 101. The opening of the battery positioning groove faces away from the receiving cavity 105. The electrical assembly 200 may also include a circuit board 270. The circuit board 270 is located in the receiving cavity 105. A changeover switch 230, a charging indicator light 261, and a discharging indicator light 262 are electrically connected to the circuit board 270.

[0121] In the illustrated example, the self-locking switch 231 of the changeover switch 230 is mounted on the circuit board 270 and located in the receiving cavity 105. The charging indicator 261 and the discharging indicator 262 are mounted on the circuit board 270 and located in the receiving cavity 105.

[0122] See Figure 2 as well as Figures 6 to 8 In addition, the changeover switch 230 may also include a balancer 234. The balancer 234 is connected between the button 233 and the connector 232. The balancer 234 abuts against each spring 235. By setting the balancer 234 to abut against each spring 235 simultaneously, forces can be applied to each spring 235 synchronously when the button 233 is operated. This effectively solves the problem of the button 233 failing to return to its normal position due to spring 235 failure, thus helping to improve the service life of the changeover switch 230.

[0123] In the illustrated example, the balancing element 234 is constructed as a long strip-shaped balancing block. The length direction of the balancing block can be consistent with the arrangement direction of the various self-locking switches 231.

[0124] See Figure 2 , Figures 6 to 11 as well as Figure 13 Furthermore, the battery compartment 101, located away from the bottom cover 103, is provided with a charging light-transmitting section 101s and a discharging light-transmitting section 101t. The main body assembly 100 may also include a charging light guide post 251 and a discharging light guide post 252. The charging light guide post 251 connects the charging light-transmitting section 101s and the charging indicator light 261. The charging light guide post 251 can be constructed as completely transparent or partially transparent. The charging light guide post 251 can transmit the light emitted by the charging indicator light 261 to the charging light-transmitting section 101s. The discharging light guide post 252 connects the discharging light-transmitting section 101t and the discharging indicator light 262. The discharging light guide post 252 can be constructed as completely transparent or partially transparent. The discharging light guide post 252 can transmit the light emitted by the discharging indicator light 262 to the discharging light-transmitting section 101t.

[0125] By adopting the above-mentioned technical means, it is convenient to install the charging indicator light 261 and the discharging indicator light 262 onto the circuit board 270, without having to directly install the charging indicator light 261 and the discharging indicator light 262 onto the charging light-transmitting part 101s and the discharging light-transmitting part 101t one by one.

[0126] In the illustrated example, the charging indicator 261 and the discharging indicator 262 can be configured as LEDs, i.e., light-emitting diodes. The color of the light emitted by the charging indicator 261 when it is working is different from the color of the light emitted by the discharging indicator 262 when it is working. The charging light-transmitting part 101s and the discharging light-transmitting part 101t are through holes formed on the top of the battery compartment 101.

[0127] In other examples not shown, the charging indicator 261 and the discharging indicator 262 can also be configured as other lights, as long as they can illuminate and serve an indicative function.

[0128] See Figures 2 to 4 , Figures 6 to 11 as well as Figures 13 to 16 For example, a battery positioning groove is provided at the top of the battery compartment 101. A bottom cover 103 is installed at the bottom of the battery compartment 101. The battery compartment 101 may include a positive terminal wall 101c facing the battery positioning groove. The positive terminal wall 101c has a positive electrode recess 101d for receiving the positive electrode portion 212. It is understood that the positive electrode recess 101d can partially or completely receive the positive electrode portion 212. The opening of the positive electrode recess 101d faces into the groove of the battery positioning groove along a first direction D1. The positive electrode portion 212 is located in the positive electrode recess 101d and does not extend beyond the positive terminal wall 101c along the first direction D1. The size of the opening of the positive electrode recess 101d along a second direction D2 is larger than the radial outer dimension of the positive electrode post 1a of the AA type battery 2 and the AAA type battery 2. The second direction D2 is perpendicular to the first direction D1. This allows the positive electrode post 1a of the battery to extend into the positive electrode recess 101d and be electrically connected to the positive electrode portion 212. Furthermore, the dimension of the groove opening of the positive electrode recess 101d along the second direction D2 is smaller than the radial outer dimension of the AAA type battery 2. This prevents the negative electrode of the battery from contacting the positive electrode portion 212 if the battery is inserted incorrectly (e.g., ...). Figure 13 and Figure 16 (As shown), this is to prevent reverse connection of the battery, thereby improving the safety of the battery charger.

[0129] See Figures 2 to 11 as well as Figures 13 to 16In some examples of this application, the positive electrode portion 212, the first negative electrode portion 213, and the second negative electrode portion 215 are constructed as elastically deformable structures, such as elastic metal sheets. The body assembly 100 has a first negative end wall 104a and a second negative end wall 101e. The first negative end wall 104a is further away from the positive end wall 101c along a first direction D1 than the second negative end wall 101e. It is understood that the dimension of the first groove portion 101a along the first direction D1 is larger than the dimension of the second groove portion 101b along the first direction D1. A first recessed groove 104b for accommodating the first negative electrode portion 213 is formed in the portion of the first negative end wall 104a corresponding to the first negative electrode portion 213. It is understood that the first recessed groove 104b can be used to accommodate at least a portion of the first negative electrode portion 213 when the first negative electrode portion 213 is not deformed, or it can be used to accommodate at least a portion of the first negative electrode portion 213 when the first negative electrode portion 213 is not deformed. A second recess 101f is provided on the portion of the second negative terminal wall 101e corresponding to the second negative terminal portion 215 for accommodating the second negative terminal portion 215. The second recess 101f can be used to accommodate at least a portion of the second negative terminal portion 215 when the second negative terminal portion 215 is not deformed, or it can be used to accommodate at least a portion of the second negative terminal portion 215 when the second negative terminal portion 215 is not deformed.

[0130] like Figures 2 to 4 as well as Figures 6 to 8 As shown, the positive electrode portion 212 can be further configured as a positive electrode metal sheet. The positive electrode metal sheet includes a first positive electrode protrusion 212a and a second positive electrode protrusion 212b extending in the first direction D1 toward the battery positioning groove.

[0131] The positive electrode metal sheet here is constructed such that:

[0132] The first positive electrode protrusion 212a contacts the positive electrode of the AA-type battery 2 located in the positive electrode groove 101d. The first positive electrode protrusion 212a and the second positive electrode protrusion 212b together contact the positive electrode of the AAA-type battery 2 located in the positive electrode groove 101d. That is, the first positive electrode protrusion 212a is used to contact the positive electrode post 1a of the AA-type battery 2 when the AA-type battery 2 is correctly placed in the first groove 101a. When the AAA-type battery 2 is correctly placed in the second groove 101b, the positive electrode post 1a of the AAA-type battery 2 is engaged or limited between the first positive electrode protrusion 212a and the second positive electrode protrusion 212b.

[0133] See Figure 2 , Figures 5 to 11 , Figure 13 , Figure 14 as well as Figure 16For example, the first negative electrode portion 213 is configured as a first negative electrode spring. The first negative electrode spring may include a first support segment 213a and a first bent segment 213b. The first support segment 213a extends along a third direction D3. The first bent segment 213b is connected to the end of the first support segment 213a. The center of curvature of the first bent segment 213b is located between the first bent segment 213b and the first support segment 213a. The first bent segment 213b is used to abut against the negative electrode of the AA-type battery 2. Under normal circumstances, the minimum distance between the first bent segment 213b and the positive end wall 101c is less than the length of the AA-type battery 2. Thus, during the process of placing the AA-type battery 2 into the first groove 101a, a resisting force is applied to the first bent segment 213b, thereby causing the first bent segment 213b to deform and shift the first support segment 213a into the first relief groove 104b. When the AA-type battery 2 is fully inserted into the first groove 101a, the first negative electrode spring contacts the negative electrode of the AA-type battery 2 through the first bending section 213b and applies an elastic restoring force to prevent the AA-type battery 2 from being moved out of the first groove 101a.

[0134] See Figure 2 , Figures 5 to 7 , Figure 10 , Figure 11 , Figure 14 as well as Figure 16 Furthermore, the free end of the first bending segment 213b is spaced apart from the first support segment 213a. This increases the maximum deformation of the first negative electrode spring.

[0135] See Figure 2 , Figures 5 to 7 , Figure 10 as well as Figure 11 Optionally, the first bent segment 213b extends towards the positive terminal wall 101c along the first direction D1 on its surface facing the positive terminal wall 101c, forming a first negative electrode protrusion 213c. This first negative electrode protrusion 213c further reduces the minimum distance between the first bent segment 213b and the positive terminal wall 101c along the first direction D1, thereby increasing the elastic force against the negative electrode of the AA-type battery 2, and thus more reliably preventing the AA-type battery 2 from detaching from the first groove 101a.

[0136] See Figure 2 , Figures 5 to 7 , Figure 10 , Figure 11 , Figure 14 as well as Figure 16 In addition, the first negative electrode spring may also include a first connecting segment 213d. The first connecting segment 213d is connected to the end of the first support segment 213a away from the first bent segment 213b along the length direction of the first support segment 213a. The first connecting segment 213d is connected to the circuit board.

[0137] In the illustrated example, the first connecting segment 213d, the first supporting segment 213a, and the first bending segment 213b are part of an elastic structure formed by bending the same elastic metal sheet. That is, the first connecting segment 213d, the first supporting segment 213a, and the first bending segment 213b are constructed as a single integral element.

[0138] Continue reading Figure 2 , Figures 5 to 7 , Figure 10 , Figure 11 , Figure 14 as well as Figure 16 For example, the second negative electrode portion 215 is constructed as a second negative electrode spring. The second negative electrode spring includes a second bent section 215b and a third bent section 215c connected in sequence. The center of curvature of the second bent section 215b is located on the side of the second bent section 215b near the center of the second groove portion 101b along the first direction D1. The center of curvature of the third bent section 215c is located on the side of the third bent section 215c away from the center of the second groove portion 101b along the first direction D1. The third bent section 215c is used to contact the negative electrode of the AAA type battery 2. Under normal circumstances, the minimum distance between the third bent section 215c and the positive end wall 101c is less than the length of the AAA type battery 2. Thus, during the process of the AAA type battery 2 being placed into the second groove portion 101b, a resisting force is applied to the third bent section 215c, thereby causing the third bent section 215c to drive the second bent section 215b to deform and shift into the second relief groove 101f. When the AAA battery 2 is fully inserted into the second groove 101b, the second negative electrode spring contacts the negative electrode of the AAA battery 2 through the third bending section 215c and applies an elastic restoring force to prevent the AAA battery 2 from being removed from the second groove 101b.

[0139] See also Figure 2 , Figures 5 to 7 , Figure 10 , Figure 11 , Figure 14 as well as Figure 16 Furthermore, the second bending segment 215b and the third bending segment 215c generally form an S-shaped bending structure. This increases the overall elastic deformation of the second negative electrode spring.

[0140] See also Figure 2 , Figures 5 to 7 , Figure 10 , Figure 11 , Figure 14 as well as Figure 16 In addition, the second negative electrode spring may also include a second connecting section 215a. The second connecting section 215a is connected to the end of the second bent section 215b away from the third bent section 215c along the length direction of the second bent section 215b.

[0141] In the illustrated example, the second connecting segment 215a, the second bent segment 215b, and the third bent segment 215c are constructed as part of another elastic structure formed by bending the same elastic metal sheet. That is, the second connecting segment 215a, the second bent segment 215b, and the third bent segment 215c are constructed as a single integral element.

[0142] See Figure 2 , Figures 5 to 11 , Figure 14 as well as Figure 16 In addition, the electrical assembly 200 may also include a circuit board 270. The electrode member 210 is connected to the circuit board 270. The circuit board 270 and / or the battery compartment 101 have a clearance hole 270a. A second bent segment 215b is movably inserted through the clearance hole 270a. The size of the clearance hole 270a along the first direction D1 is larger than the size of the second bent segment 215b along the first direction D1. The size of the clearance hole 270a along the first direction D1 is smaller than the sum of the sizes of the second bent segment 215b and the third bent segment 215c along the first direction D1. By providing the clearance hole 270a, space can be provided for the deformation of the second negative electrode spring, thereby further increasing the maximum deformation that the second negative electrode spring can undergo elastic deformation.

[0143] See Figure 1 , Figure 2 , Figure 9 , Figure 12 , Figure 13 as well as Figure 15 In addition, the main body assembly 100 may also include a cover 102. The cover 102 can be openedably connected to the battery compartment 101 by means of snap-fit, pivot connection or other means. By providing the cover 102, the battery compartment 101 can be covered to prevent foreign objects from entering.

[0144] Furthermore, the cover 102 can be configured to be completely transparent or partially transparent, thereby allowing users to visually observe the battery compartment.

[0145] Continue reading Figure 1 , Figure 2 , Figure 9 , Figure 12 , Figure 13 as well as Figure 15For example, the face cover 102 has a first handle 102a. One of the bottom cover 103 and the battery compartment 101 has a second handle 103a. The second handle 103a is correspondingly disposed to the first handle 102a. The projections of the second handle 103a and the first handle 102a onto a plane perpendicular to a third direction D3 are at least partially offset. The third direction D3 is parallel or approximately parallel to the orientation of the opening of the battery positioning slot. "Approximately parallel" here can be understood as the third direction D3 having a small or slight angle with the orientation of the opening of the battery positioning slot. The first handle 102a and the second handle 103a are operated to open the face cover 102. By at least partially offsetting the first handle 102a and the second handle 103a, it is easier to apply force to the first handle 102a and the second handle 103a, thereby making it easier and less strenuous to open the face cover 102.

[0146] See also Figure 1 , Figure 2 , Figure 9 , Figure 12 , Figure 13 as well as Figure 15 Furthermore, at least one of the bottom cover 103 and the battery compartment 101 is provided with a handle groove 103b. The handle groove 103b is correspondingly provided with the first handle 102a along the third direction D3. The handle groove 103b is used to cooperate with the first handle 102a to open the cover 102.

[0147] In the illustrated example, the handle groove 103b is recessed on the outer side of the bottom cover 103. The first handle 102a is more protruding relative to the outer side of the bottom cover 103. That is, the first handle 102a extends to the outer side of the bottom cover 103, thereby creating a larger operating space between the handle groove 103b and the first handle 102a, thus increasing the area that can be operated and contacted by the user, making it more convenient and effortless to operate the first handle 102a.

[0148] See Figure 2 , Figure 9 , Figure 12 , Figure 13 as well as Figure 15 For example, the front cover 102 has a first snap-fit ​​portion 102b. At least one of the battery compartment 101 and the bottom cover 103 is provided with a second snap-fit ​​portion 101g. The second snap-fit ​​portion 101g is arranged corresponding to the first snap-fit ​​portion 102b and is used to snap onto the first snap-fit ​​portion 102b. The second snap-fit ​​portion 101g is spaced around the outer periphery of the bottom cover 103.

[0149] In the illustrated example, the second snap-fit ​​portion 101g forms the connection point with the battery compartment 101 and the bottom cover 103. The second snap-fit ​​portion 101g is constructed as a snap-fit ​​groove. The first snap-fit ​​portion 102b is constructed as a snap-fit ​​protrusion. The connection between the top cover 102 and the bottom cover 103 or the battery compartment 101 is achieved through the engagement of the snap-fit ​​protrusion and the snap-fit ​​groove. Here, the battery compartment 101 and the bottom cover 103 can also be installed by snap-fit. Usually, in order to improve the sealing of the connection between the battery compartment 101 and the bottom cover 103, adhesive can be used to further fix the connection between the battery compartment 101 and the bottom cover 103.

[0150] See Figure 1 , Figure 2 , Figure 9 , Figure 12 , Figure 13 as well as Figure 15 Optionally, the connection structure of the first latch 102a and the second latch 103a is located between the connection structures of adjacent first latching portions 102b and second latching portions 101g. That is, the first latch 102a is located between adjacent first latching portions 102b, and the second latch 103a is located between adjacent second latching portions 101g. Compared with the arrangement of aligning the first latch 102a with the first latching portion 102b, this arrangement makes it easier for the cover 102 to deform at the first latch 102a, thereby making it easier for the first latch 102b and the second latching portion 101g to disengage when the first latch 102a and the second latch 103a are operated, thus enabling the cover 102 to be opened.

[0151] See Figure 2 , Figures 9 to 11 , Figure 13 , Figure 14 as well as Figure 16 Furthermore, the main body assembly 100 may also include a light guide 104. The light guide 104 is constructed to be transparent or semi-transparent. The light guide 104 includes a first negative terminal wall 104a. That is, the first negative terminal wall 104a is part of the light guide 104. When the battery charger of this application is applied to a rechargeable battery in which the negative terminal can emit light during charging, the light guide 104 can increase the transmission path and light guiding area of ​​the light emitted from the negative terminal of the battery, thereby making it easier to observe the state of the battery during charging.

[0152] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0153] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A battery charger that can be used as a power bank, characterized in that, The battery charger that can be used as a power bank includes: The body assembly includes a battery positioning groove extending along a first direction, the battery positioning groove being used to accommodate one of an AA battery and an AAA battery at different times; and Electrical components, the electrical components including: An electrode component, comprising a positive electrode portion and a negative electrode portion, wherein the positive electrode portion is located at one end of the battery positioning groove along the first direction, and the negative electrode portion is located at the other end of the battery positioning groove along the first direction; An interface component, the interface component being electrically connected to the electrode component; and A selector switch, connected in series between the interface component and the electrode component, is configured to change the electrical connection state of the interface component and the electrode component when operated, thereby switching the battery charger between a charging mode and a discharging mode. The battery positioning groove includes a first groove and a second groove. The first groove is used to accommodate an AA type battery, and the second groove is used to accommodate an AAA type battery. The projection of the second groove onto a projection plane perpendicular to a third direction is completely located within the projection of the first groove onto the projection plane. The third direction is parallel to the orientation of the opening of the battery positioning groove and perpendicular to the first direction. The body assembly includes at least two battery positioning slots, which are spaced apart along a second direction perpendicular to the first direction. Each battery positioning slot is respectively provided with an electrode component. Wherein, the first groove and the second groove intersect at their corresponding ends along the first direction, the positive electrode is correspondingly disposed at the intersection of the first groove and the second groove, the negative electrode includes a first negative electrode and a second negative electrode, the first negative electrode is correspondingly disposed at the end of the first groove along the first direction away from the positive electrode, for contacting the negative electrode of an AA battery, the second negative electrode is correspondingly disposed at the end of the second groove along the first direction away from the positive electrode, for contacting the negative electrode of an AAA battery, and the projections of the second negative electrode and the first groove on a projection plane perpendicular to the first direction are offset from each other in the third direction.

2. The battery charger that can be used as a power bank according to claim 1, characterized in that, The changeover switch includes: At least two self-locking switches that are parallel to each other; A button, connected to each of the self-locking switches, is used to be pressed to change the electrical connection state of each self-locking switch.

3. The battery charger that can be used as a power bank according to claim 2, characterized in that, The changeover switch further includes: At least two connectors are connected one-to-one to each of the self-locking switches, and the connectors are connected to the buttons; At least two springs are sleeved on the outside of the connector and located between the button and the self-locking switch. The springs are used to apply a force to the button in a direction away from the self-locking switch.

4. The battery charger that can be used as a power bank according to claim 1, characterized in that, The electrical components also include at least one of a charging indicator and a discharging indicator, the charging indicator being electrically connected to the selector switch and configured to indicate the charging status of the battery when the battery charger is in charging mode, and the discharging indicator being electrically connected to the selector switch and configured to indicate the discharging status of the battery when the battery charger is in discharging mode.

5. The battery charger that can be used as a power bank according to claim 4, characterized in that, The main body component includes a battery compartment and a bottom cover. The battery compartment has a battery positioning groove. The bottom cover is connected to the battery compartment. A receiving cavity is formed between the bottom cover and the battery compartment. The opening of the battery positioning groove faces away from the receiving cavity. The electrical components also include a circuit board located in the receiving cavity, and the changeover switch, the charging indicator light, and the discharging indicator light are electrically connected to the circuit board.

6. The battery charger that can be used as a power bank according to claim 5, characterized in that, The battery compartment has a charging light-transmitting part and a discharging light-transmitting part located on the part opposite to the bottom cover. The main body component also includes a charging light guide column and a discharging light guide column. The charging light guide column is connected between the charging light-transmitting part and the charging indicator light, and the discharging light guide column is connected between the discharging light-transmitting part and the discharging indicator light.

7. The battery charger that can be used as a power bank according to claim 1, characterized in that, The main body assembly includes a battery compartment with a battery positioning groove. The battery compartment includes a positive end wall facing the battery positioning groove. The positive end wall has a positive electrode groove. The opening of the positive electrode groove points into the groove of the battery positioning groove along a first direction. The dimension of the opening of the positive electrode groove along a second direction is larger than the radial outer dimension of the positive electrode post of an AA battery, and the dimension of the opening of the positive electrode groove along the second direction is smaller than the radial outer dimension of an AAA battery. The positive electrode portion is located in the positive electrode groove and does not extend beyond the positive end wall along the first direction, which is perpendicular to the second direction.

8. The battery charger that can be used as a power bank according to claim 7, characterized in that, The positive electrode portion, the first negative electrode portion, and the second negative electrode portion are constructed as structures capable of elastic deformation. The body assembly has a first negative end wall and a second negative end wall. The first negative end wall is further away from the positive end wall than the second negative end wall along the first direction. A first recess groove for accommodating the first negative end portion is formed on the portion of the first negative end wall corresponding to the first negative end portion. A second recess groove for accommodating the second negative end portion is formed on the portion of the second negative end wall corresponding to the second negative end portion.

9. The battery charger that can be used as a power bank according to claim 7, characterized in that, The positive electrode portion is configured as a positive electrode metal sheet, the positive electrode metal sheet including a first positive electrode protrusion and a second positive electrode protrusion extending toward the battery positioning groove in the first direction, the positive electrode metal sheet being configured such that: The first positive electrode protrusion contacts the positive electrode of the AA type battery located in the positive electrode groove, and the first positive electrode protrusion and the second positive electrode protrusion together contact the positive electrode of the AAA type battery located in the positive electrode groove.

10. The battery charger that can be used as a power bank according to claim 7, characterized in that, The first negative electrode portion is constructed as a first negative electrode spring, which includes a first support section and a first bending section. The first support section extends in a third direction, and the first bending section is connected to the end of the first support section. The curvature center of the first bending section is located between the first bending section and the first support section. The first bending section is used to abut against the negative electrode of the AA type battery.

11. The battery charger that can be used as a power bank according to claim 10, characterized in that, The free end of the first bending segment is spaced apart from the first support segment.

12. The battery charger that can be used as a power bank according to claim 7, characterized in that, The second negative electrode portion is constructed as a second negative electrode spring. The second negative electrode spring includes a second bent segment and a third bent segment connected in sequence. The curvature center of the second bent segment is located on the side of the second bent segment near the center of the second groove in the first direction. The curvature center of the third bent segment is located on the side of the third bent segment opposite to the center of the second groove in the first direction.

13. The battery charger that can be used as a power bank according to claim 12, characterized in that, The second bending segment and the third bending segment form an S-shaped bending structure.

14. The battery charger that can be used as a power bank according to claim 12, characterized in that, The electrical component further includes a circuit board, the electrode component is connected to the circuit board, the circuit board and / or the battery compartment are provided with a clearance hole, the second bent segment is movably inserted through the clearance hole, the size of the clearance hole along the first direction is greater than the size of the second bent segment along the first direction, and the size of the clearance hole along the first direction is less than the sum of the sizes of the second bent segment and the third bent segment along the first direction.

15. The battery charger that can be used as a power bank according to claim 1, characterized in that, The main body component includes a battery compartment and a bottom cover. The battery compartment has a battery positioning groove. The bottom cover is connected to the battery compartment. A receiving cavity is formed between the bottom cover and the battery compartment. The opening of the battery positioning groove faces away from the receiving cavity. The electrical component also includes a circuit board located in the receiving cavity, and the electrode member is connected to the circuit board.

16. The battery charger that can be used as a power bank according to claim 1, characterized in that, The main body component includes a battery compartment, a bottom cover, and a top cover. The battery compartment has a battery positioning groove. The bottom cover is connected to the battery compartment, and the top cover is operably connected to the battery compartment.

17. The battery charger that can be used as a power bank according to claim 16, characterized in that, The face cover has a first handle, and one of the bottom cover and the battery compartment has a second handle. The second handle is corresponding to the first handle, and the projections of the second handle and the first handle onto a plane perpendicular to a third direction are at least partially offset. The third direction is parallel to the orientation of the slot of the battery positioning groove. The first handle and the second handle are operated to open the face cover.

18. The battery charger that can be used as a power bank according to claim 17, characterized in that, At least one of the bottom cover and the battery compartment is provided with a handle groove, the handle groove is provided corresponding to the first handle along the third direction, and the handle groove is used to cooperate with the first handle to open the top cover.

19. The battery charger that can be used as a power bank according to claim 17, characterized in that, The face cover has a first snap-fit ​​portion, and at least one of the battery compartment and the bottom cover is provided with a second snap-fit ​​portion. The second snap-fit ​​portion is arranged corresponding to the first snap-fit ​​portion and is used to snap onto the first snap-fit ​​portion. The second snap-fit ​​portion is spaced around the outer periphery of the bottom cover.

20. The battery charger that can be used as a power bank according to claim 19, characterized in that, The first latch and the second latch are located between adjacent first locking parts and second locking parts.

21. The battery charger that can be used as a power bank according to claim 8, characterized in that, The main body component includes a light guide, which is constructed to be transparent or semi-transparent, and includes a first negative end wall.

22. The battery charger that can be used as a power bank according to claim 3, characterized in that, The selector switch further includes a balancer connected between the button and the connector, and the balancer abuts against each of the springs.

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