CN113872282A - Mobile power supply device - Google Patents

Mobile power supply device Download PDF

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Publication number
CN113872282A
CN113872282A CN202111126402.2A CN202111126402A CN113872282A CN 113872282 A CN113872282 A CN 113872282A CN 202111126402 A CN202111126402 A CN 202111126402A CN 113872282 A CN113872282 A CN 113872282A
Authority
CN
China
Prior art keywords
power supply
mobile power
supply device
groove
plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111126402.2A
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Chinese (zh)
Inventor
邱白玮
陈鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Irice Electronics Development Co ltd
Original Assignee
Dongguan Irice Electronics Development Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Irice Electronics Development Co ltd filed Critical Dongguan Irice Electronics Development Co ltd
Priority to CN202111126402.2A priority Critical patent/CN113872282A/en
Publication of CN113872282A publication Critical patent/CN113872282A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/72Means for accommodating flexible lead within the holder
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries

Abstract

The invention provides a mobile power supply device which comprises a shell, an energy storage unit and a circuit board, wherein the energy storage unit and the circuit board are respectively arranged in the shell; the casing includes first terminal surface, just first terminal surface is equipped with first groove, the second of accomodating and spread groove, first groove and the second of accomodating are accomodate the groove and are passed through the spread groove is linked together, just portable power source device accomodates and fixes the first plug of charging wire through first groove of accomodating, accomodates the groove through the second accomodates the second plug of charging wire, and passes through the spread groove is accomodate the wire rod of charging wire. According to the charging wire storage device, the first storage groove, the second storage groove and the connecting groove are formed in the first end face of the shell of the mobile power supply device to respectively store the first plug, the second plug and the wire rod of the charging wire, so that the charging wire is greatly convenient to carry, and the charging wire taking and placing operation is convenient.

Description

Mobile power supply device
Technical Field
The invention relates to the field of mobile power supplies, in particular to a mobile power supply device convenient for charging wire storage.
Background
The popularization of mobile devices such as smart phones, the increase of screens and the continuous improvement of built-in functions of the mobile devices, so that the power consumption of the mobile devices is continuously increased. Because these mobile devices's self electric quantity is limited, when people were in outdoor activities, can't charge it, easily lead to the electric quantity not enough to influence the use.
In order to solve the problem of electric quantity not enough, can use portable power source, portable power source is the electric energy storage electrical apparatus that can hand-carry, but portable power source in the existing market still has some not enoughly, for example most portable power source and charging wire are divided, portable power source's charging wire is not convenient for carry and deposit to it twines folding to take place easily in the deposit process, makes the charging wire damage easily, thereby shortens the life of charging wire.
In addition, there are some portable power source self to carry the charging wire, but the one end of these charging wires is direct together with portable power source integration, need fill in the narrow wire casing with the charging wire after the use finishes, and the operation is inconvenient. And above-mentioned charging wire can't take off from this portable power source, can't change when damaging. In some cases (for example, when the mobile power supply is not powered), the charging wire cannot be removed and applied to charging between other devices.
Disclosure of Invention
The invention aims to solve the technical problem of providing a new mobile power supply device aiming at the problems that the charging wire of the mobile power supply is inconvenient to carry and the charging wire cannot be taken down together with the mobile power supply.
The technical scheme for solving the technical problems is that the invention provides a mobile power supply device, which comprises a shell, an energy storage unit and a circuit board, wherein the energy storage unit and the circuit board are respectively arranged in the shell;
the casing includes first terminal surface, just first terminal surface is equipped with first groove, the second of accomodating and spread groove, first groove and the second of accomodating is accomodate the groove and is passed through the spread groove is linked together, just portable power source device passes through first plug of accomodating the groove and accomodating and fixing the charging wire is accomodate to the second, through the groove is accomodate to the second is accomodate and is fixed the second plug of charging wire, and passes through the spread groove is accomodate the wire rod of charging wire.
As a further improvement of the present invention, a first dc socket is disposed in the first receiving groove, the first dc socket is electrically connected to the circuit board, and the first plug of the charging wire is received and fixed in the first receiving groove in a manner of being plugged into the first dc socket.
As a further improvement of the present invention, the plugging direction of the first plug of the charging wire is perpendicular to the plugging direction of the second plug, and the second plug of the charging wire is received in the second receiving groove in a manner that the plugging direction is parallel to the first end face;
and a first magnet is arranged in the second accommodating groove, and the second accommodating groove fixes the second plug in a manner that the first magnet adsorbs the magnet or the manganese steel material at the second plug.
As a further improvement of the present invention, a second dc socket is disposed in the connecting groove, and the width of the connecting groove is greater than the width of the second dc socket.
As a further development of the invention, the first end face is not larger than the other end faces of the housing.
As a further improvement of the present invention, the first dc socket is a USB Type-C dc socket, the second dc socket is a standard USB dc socket, and the first plug and the second plug are both USB Type-C plugs.
As a further improvement of the present invention, centers of the first receiving groove, the second receiving groove and the connecting groove are located on the same straight line, the first receiving groove and the second receiving groove are respectively shaped like a concave ellipsoid, and widths of openings of the first receiving groove and the second receiving groove are both greater than a width of an opening of the connecting groove.
As a further improvement of the present invention, the first end surface of the housing has a plurality of first conductive contacts electrically connected to the circuit board respectively; the plurality of first conductive contacts are arranged around the first accommodating groove, the second accommodating groove and the connecting groove and form a direct current output interface.
As a further improvement of the present invention, the housing includes a second end face disposed opposite to the first end face;
the second end face is provided with a plurality of second conductive contacts which are electrically connected with the circuit board respectively, and the second conductive contacts form a direct current input interface; the direct current input interface is matched with the direct current output interface, and the mobile power supply device is electrically connected with another mobile power supply device in a mode that the direct current input interface is connected with a direct current output interface of the other mobile power supply device.
As a further improvement of the present invention, the first end surface and the second end surface are rectangular, each corner of the first end surface is provided with a boss, and the first conductive contact is formed by a first metal spring pin which is located in the boss and the top end of which is recessed from the top end of the boss; each corner of the second end surface is provided with a concave pit corresponding to the boss, and the second conductive contact is formed by a second metal elastic needle which is positioned in the concave pit and the top end of which protrudes out of the bottom of the concave pit;
the edge of each side of the first end surface is provided with a second magnet respectively; and when the second magnet and the third magnet of the other mobile power supply device are attracted together, the direct current input interface of the mobile power supply device is electrically connected with the direct current output interface of the other mobile power supply device.
The invention has the following beneficial effects: set up first groove, the second of accomodating through the first terminal surface at the casing and accomodate groove and spread groove in order to accomodate first plug, second plug and the wire rod of charging wire respectively to greatly made things convenient for carrying of charging wire, and the charging wire is got and is put the simple operation.
Drawings
Fig. 1 is a schematic structural diagram of a mobile power supply device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first end surface of a mobile power supply device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the mobile power supply device according to the embodiment of the present invention after a charging wire is received;
FIG. 4 is an enlarged schematic view of portion A of FIG. 3;
fig. 5 is a schematic structural diagram of a second end face of the mobile power supply device according to the embodiment of the invention;
fig. 6 is an enlarged schematic view of a portion B in fig. 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a schematic structural diagram of a mobile power supply device according to an embodiment of the present invention, where the mobile power supply device may be specifically used for charging a mobile terminal such as a smart phone. The mobile power supply device of this embodiment includes a housing 10, an energy storage unit (not shown in the figure) and a circuit board (not shown in the figure), wherein the energy storage unit may be 18650 electric cores, polymer electric cores, lithium iron phosphate electric cores, and other electric cores capable of being repeatedly charged and discharged, a dc-to-dc converter circuit, a state detection circuit, a safety circuit, and the like are integrated on the circuit board, the energy storage unit and the circuit board are respectively installed in the housing 10, and the energy storage unit is electrically connected to the circuit board (i.e., the dc-to-dc converter circuit). The structures of the energy storage unit and the circuit board themselves are well known in the art and will not be described herein. In addition, the case 10 may further include a coil for wireless charging and discharging, that is, the mobile terminal may be wirelessly charged using the mobile power supply device.
The housing 10 may be made of plastic, metal, etc., and the housing 10 includes a first end surface 11. Specifically, the housing 10 may have a rectangular parallelepiped shape as a whole, and the first end surface 11 may be the smallest-sized surface of the housing 10, that is, the first end surface 11 is not larger than the other end surfaces of the housing 10.
A first receiving groove 111, a second receiving groove 112 and a connecting groove 113 are formed on the first end surface 11, wherein the first receiving groove 111, the second receiving groove 112 and the connecting groove 113 are respectively formed by grooves on the first end surface 11, the first receiving groove 111 and the second receiving groove 112 are communicated through the connecting groove 113, the sizes of the first receiving groove 111, the second receiving groove 112 and the connecting groove 113 are respectively larger than the sizes of the first plug 21, the second plug 22 and the wire 23 of the charging cord 20, the mobile power supply device receives and fixes the first plug 21 of the charging cord 20 through the first receiving groove 111, receives and fixes the second plug 22 of the charging cord 20 through the second receiving groove 112, and receives the wire 23 of the charging cord 20 through the connecting groove 113, and the first plug 21, the second plug 22 and the wire 23 of the charging cord 20 are received in the first receiving groove 111, the second receiving groove 112 and the connecting groove 113 respectively, are lower than the first end surface 11 or are flush with the first end surface 11. That is, the first plug 21, the second plug 22, and the wire 23 of the charging cord 20 are respectively housed in the first housing groove 111, the second housing groove 112, and the connection groove 113 so as to be fitted into the first end surface 11.
Above-mentioned mobile power supply device is through setting up first groove 111 of accomodating, second in the first terminal surface 11 of casing 10 and accomodating groove 112 and connecting groove 113 in order to accomodate the first plug 21, the second plug 22 and the wire rod 23 of charging wire 20 respectively, thereby greatly made things convenient for the carrying of charging wire 20, and because the first plug 21 of charging wire 20, second plug 22 and wire rod 23 place in mobile power supply device's same terminal surface, the getting of charging wire 20 is put easy operation. Moreover, the charging wire 20 can be completely taken out from the first accommodating groove 111, the second accommodating groove 112 and the connecting groove 113, so that on one hand, the situation that the mobile power supply device cannot be used due to the damage of the charging wire 20 can be avoided, and on the other hand, the charging wire 20 can be conveniently applied to other devices.
In order to facilitate the operation of taking and placing the charging cord 20, in an embodiment of the present invention, the sizes of the openings of the first receiving groove 111, the second receiving groove 112 and the connecting groove 113 on the first end surface 11 are respectively larger than the sizes of the first plug 21, the second plug 22 and the wire 23 of the charging cord 20, and the centers (e.g., symmetry axes) of the first receiving groove 111, the second receiving groove 112 and the connecting groove 113 are located on the same straight line, so that when the charging cord 20 is taken out or the charging cord 20 is received in the housing 11, precise alignment is not required. Specifically, the first receiving groove 111 and the second receiving groove 112 may have a concave ellipsoidal shape, respectively, and the width of the opening of the first receiving groove 111 and the second receiving groove 112 is greater than the width of the opening of the connection groove in consideration of the structure of the charging cord 20.
In an embodiment of the invention, as shown in fig. 2, a first dc socket 116 is disposed in the first receiving slot 111 of the mobile power supply device, and the first dc socket 116 is electrically connected to the circuit board, so that the mobile power supply device can charge the mobile terminal through the first dc socket 116 (the mobile terminal can be connected to the first dc socket 116 by a charging wire) or charge the energy storage unit of the mobile power supply device through the power adapter. Moreover, the first plug 21 of the charging cord is received and fixed in the first receiving groove 111 in a manner of being plugged into the first dc socket 116, that is, the first dc socket 116 can not only realize the electrical connection with the charging cord 20, but also realize the fixation of the first plug 21. When the charging cord 20 needs to be applied to other devices, the first plug 21 is only required to be pulled out from the first dc socket 116.
Since the first dc socket 116 is located at the bottom of the first receiving groove 111, it is not only avoided that the plug protrudes from the surface of the mobile power device when the charging cord 20 is used to charge the mobile terminal, but also the depth of the first receiving groove 111 can be reduced. To improve the versatility, the first dc socket 116 may adopt a USB Type-C female socket. Of course, in practical applications, the first dc jack 116 may also adopt other sockets, such as a Micro USB socket, a Lightning interface socket, and the like.
In an embodiment of the present invention, the first plug 21 of the charging cable 20 is perpendicular to the plugging direction of the second plug, and the second plug 22 of the charging cable 20 is received in the second receiving groove 112 in a manner that the plugging direction is parallel to the first end surface 11. In the charging wire 20, the first plug 21 and the second plug 22 may employ the same plug, for example, when the first dc outlet 116 employs a USB Type-C female socket, the first plug 21 and the second plug 22 employ a USB Type-C male plug. Of course, in practical applications, different types of plugs can be used for the first plug 21 and the second plug 22.
Also, a first magnet (not shown) is disposed in the second receiving groove 112, and the first magnet may be disposed on the surface of the inner wall of the second receiving groove 112 or below the inner wall of the second receiving groove 112. Accordingly, the second receiving groove 112 fixes the second plug 22 by way of the first magnet attracting the manganese steel material at the second plug 22 (for example, by an iron sheath of the second plug 22 itself, or a manganese steel material injected into the second plug 22, etc.), that is, the second plug 22 is fixed in the second receiving groove 112 by way of magnetic attraction. Thus, when the charging wire 20 is used to charge the mobile terminal (or charge the energy storage unit of the mobile terminal), the second plug 22 is taken out from the second accommodating groove 112 only by overcoming the magnetic force of the first magnet, and then the second plug 22 is plugged into the corresponding socket of the mobile terminal; after the charging is completed, the second plug 22 is simply released, and the second plug 22 can be automatically received and fixed in the second receiving groove 112 under the driving of the cable 23 and the magnetic force of the first magnet.
To further improve the versatility of the mobile power supply device, for example, to charge more mobile terminals with different interfaces, the mobile power supply device may include a second dc socket 117, where the second dc socket 117 may be specifically disposed at the bottom of the connecting slot 113, and the width of the connecting slot 113 (i.e., the dimension along the short side direction of the first end surface) is greater than the width of the second dc socket 117. For example, the second dc socket 117 may be a standard USB dc socket.
In an embodiment of the present invention, as shown in fig. 3 to 4, in order to charge the energy storage unit in the mobile power supply device, the first end surface 11 of the housing 10 of the mobile power supply device further has a plurality of first conductive contacts 114, and the plurality of first conductive contacts 114 are electrically connected to the circuit board in the housing 10, respectively. The plurality of first conductive contacts 114 are disposed around the first receiving groove 111, the second receiving groove 112, and the connecting groove 113, and form a dc output interface, that is, the dc output interface is located on one end surface of the mobile power supply device, and when charging other electronic devices (for example, a mobile phone charging dock or other mobile power supply devices), only the first end surface 11 needs to be attached to the charging interfaces of the other electronic devices, and the charging wires do not need to be connected.
In particular, and as shown in connection with fig. 5-6, the housing 10 further includes a second end surface 12, the second end surface 12 being disposed opposite the first end surface 11. The second end surface 12 has a plurality of second conductive contacts 124, the second conductive contacts 124 are electrically connected to the circuit board in the housing 10, and the second conductive contacts 124 form a dc input interface.
The direct current input interface is matched with the direct current output interface, and the mobile power supply device is electrically connected with another mobile power supply device in a mode that the direct current input interface is connected with a direct current output interface of another mobile power supply device (at the moment, the first end face 11 is attached to the second end face 12 of another mobile power supply device), so that the current mobile power supply device can be charged through another mobile power supply device without a charging wire, and mutual charging among the mobile power supply devices is realized.
Referring to fig. 3-6, in an embodiment of the present invention, the first end surface 11 and the second end surface 12 are rectangular, each corner of the first end surface 11 is provided with a boss 118, the boss 118 is slightly larger than the first conductive contact 114, and the first conductive contact 114 is formed by a first metal pogo pin which is located in the boss 118 and has a top end recessed from a top end of the boss 118 (the top end of the first metal pogo pin is higher than the first end surface 11); accordingly, each corner of the second end face 12 is provided with a recess 128 corresponding to the boss 118, and the second conductive contact 124 is formed by a second metal latch located in the recess 128 and having a top protruding from the bottom of the recess 128 (the top of the second metal latch is lower than the second end face 12). When the dc input interface and the dc output interface are electrically connected, the first boss 118 of the first end surface 11 is embedded into the recess 128 of the second end surface 12 (another portable power supply device), so as to prevent displacement and improve the connection stability.
Moreover, in order to realize fool-proofing, the shapes of the plurality of bosses 118 may be different, for example, the outer wall of part of the bosses 118 is in a circular truncated cone shape, and the outer wall of part of the bosses 118 is in a truncated pyramid shape; accordingly, the plurality of recesses 128 may have different shapes, such as a truncated cone shape on the inner wall of a portion of the recesses 128 and a truncated pyramid shape on the inner wall of a portion of the recesses 128. Thus, the truncated cone shaped protrusion 118 can only be inserted into the truncated cone shaped recess 128, and the truncated cone shaped protrusion 118 can only be inserted into the truncated cone shaped recess 128, so as to avoid misconnection of the first conductive contact 114 and the second conductive contact 124.
Meanwhile, the edges of each side of the first end surface 11 are respectively provided with a second magnet 115, and the plurality of second magnets 115 may have the same polarity; correspondingly, the second end face 12 is provided with a plurality of third magnets 125 which have the same positions and opposite polarities with the second magnets 115, and when the dc input interface of the mobile power supply device is electrically connected with the dc output interface of another mobile power supply device, the second magnets 115 and the third magnets 125 of another mobile power supply device are attracted together. Through the second magnet 115 and the third magnet 125, not only can the fixing of the two mobile power supply devices be realized, but also the alignment of the first conductive contact 114 and the second conductive contact 124 can be assisted.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A mobile power supply device is characterized by comprising a shell, an energy storage unit and a circuit board, wherein the energy storage unit and the circuit board are respectively arranged in the shell;
the shell comprises a first end face, the first end face is provided with a first accommodating groove, a second accommodating groove and a connecting groove, and the first accommodating groove and the second accommodating groove are communicated through the connecting groove; and the mobile power supply device is used for storing and fixing a first plug of a charging wire through the first storage groove, storing and fixing a second plug of the charging wire through the second storage groove, and storing the wire rod of the charging wire through the connecting groove.
2. The mobile power supply device according to claim 1, wherein a first dc socket is disposed in the first receiving groove, the first dc socket is electrically connected to the circuit board, and the first plug of the charging wire is received and fixed in the first receiving groove in a manner of being plugged into the first dc socket.
3. The mobile power supply device according to claim 2, wherein a plugging direction of the first plug of the charging wire is perpendicular to a plugging direction of the second plug, and the second plug of the charging wire is received in the second receiving groove in a manner that the plugging direction is parallel to the first end face;
and a first magnet is arranged in the second accommodating groove, and the second accommodating groove fixes the second plug in a manner that the first magnet adsorbs the magnet or the manganese steel material at the second plug.
4. The mobile power supply device according to claim 3, wherein a second dc socket is disposed in the connecting slot, and a width of the connecting slot is greater than a width of the second dc socket.
5. The mobile power supply apparatus according to claim 1, wherein the first end face is not larger than other end faces of the case.
6. The mobile power supply device according to claim 4, wherein the first DC socket is a USB Type-C DC socket, the second DC socket is a standard USB DC socket, and the first plug and the second plug are both USB Type-C plugs.
7. The mobile power supply device according to claim 4, wherein centers of the first receiving groove, the second receiving groove, and the connecting groove are located on a same straight line, the first receiving groove and the second receiving groove are respectively shaped like a concave ellipsoid, and widths of openings of the first receiving groove and the second receiving groove are larger than a width of an opening of the connecting groove.
8. The mobile power supply device according to any one of claims 1 to 7, wherein the first end surface of the housing has a plurality of first conductive contacts electrically connected to the circuit board, respectively; the plurality of first conductive contacts are arranged around the first accommodating groove, the second accommodating groove and the connecting groove and form a direct current output interface.
9. The mobile power supply device according to claim 8, wherein the case includes a second end face disposed opposite to the first end face;
the second end face is provided with a plurality of second conductive contacts which are electrically connected with the circuit board respectively, and the second conductive contacts form a direct current input interface; the direct current input interface is matched with the direct current output interface, and the mobile power supply device is electrically connected with another mobile power supply device in a mode that the direct current input interface is connected with a direct current output interface of the other mobile power supply device.
10. The mobile power supply device according to claim 9, wherein the first end face and the second end face are rectangular, each corner of the first end face is provided with a boss, and the first conductive contact is formed by a first metal spring pin which is located in each boss and has a top end recessed from a top end of the boss; each corner of the second end surface is provided with a concave pit corresponding to the boss, and the second conductive contact is formed by a second metal elastic needle which is positioned in the concave pit and the top end of which protrudes out of the bottom of the concave pit;
the edge of each side of the first end surface is provided with a second magnet respectively; and when the second magnet and the third magnet of the other mobile power supply device are attracted together, the direct current input interface of the mobile power supply device is electrically connected with the direct current output interface of the other mobile power supply device.
CN202111126402.2A 2021-09-24 2021-09-24 Mobile power supply device Pending CN113872282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111126402.2A CN113872282A (en) 2021-09-24 2021-09-24 Mobile power supply device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111126402.2A CN113872282A (en) 2021-09-24 2021-09-24 Mobile power supply device

Publications (1)

Publication Number Publication Date
CN113872282A true CN113872282A (en) 2021-12-31

Family

ID=78994326

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111126402.2A Pending CN113872282A (en) 2021-09-24 2021-09-24 Mobile power supply device

Country Status (1)

Country Link
CN (1) CN113872282A (en)

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