CN220043018U - Energy storage device and energy storage system - Google Patents
Energy storage device and energy storage system Download PDFInfo
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- CN220043018U CN220043018U CN202321038675.6U CN202321038675U CN220043018U CN 220043018 U CN220043018 U CN 220043018U CN 202321038675 U CN202321038675 U CN 202321038675U CN 220043018 U CN220043018 U CN 220043018U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 259
- 238000006243 chemical reaction Methods 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
An energy storage device and an energy storage system comprise a first module and a second module, wherein the first module comprises a first energy storage unit, the second module is detachably connected with the first module, the second module comprises a second energy storage unit and a power conversion unit, and the power conversion unit is electrically connected with the second energy storage unit; when the first module is connected with the second module, the power conversion unit is also electrically connected with the first energy storage unit so as to charge and discharge at least one energy storage unit of the first energy storage unit and the second energy storage unit; the energy density of the second energy storage unit is greater than that of the first energy storage unit, and the second module of the energy storage device is detachably connected with the first module, so that portability and use flexibility are considered.
Description
Technical Field
The present disclosure relates to electronic technology, and more particularly, to an energy storage device and an energy storage system.
Background
Some energy storage devices, such as mobile energy storage power sources, are generally integrated with an energy storage unit for storing electric energy and a power conversion unit for converting the stored electric energy of the energy storage unit and outputting power. Because of the requirements of capacity and output power of the stored electric energy, for example, more electric energy is stored, the volume and weight of the mobile energy storage power supply are increased, and the portability and the use flexibility of the mobile energy storage power supply are affected.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an energy storage device and an energy storage system, so that the energy storage device combines portability and flexibility of use.
In a first aspect, an embodiment of the present utility model provides an energy storage device, including a first module and a second module, where the first module includes a first energy storage unit, and the second module is detachably connected to the first module, and the second module includes a second energy storage unit and a power conversion unit, and the power conversion unit is electrically connected to the second energy storage unit; when the first module is connected with the second module, the power conversion unit is also electrically connected with the first energy storage unit so as to charge and discharge at least one energy storage unit of the first energy storage unit and the second energy storage unit; the energy density of the second energy storage unit is greater than the energy density of the first energy storage unit.
In the above embodiments, the first module and the second module are detachably connected, so that the first module and the second module can be used alone or in connection. When first module and second module dismantlement, only use the second module comparatively light, the energy density of the second energy storage unit in this first module is great moreover, can store more electric quantity, satisfies the electric quantity demand when using first module alone. When the first module is connected with the second module, the power conversion unit can charge and discharge at least one energy storage unit of the first energy storage unit and the second energy storage unit, and the first module and the second module can be used simultaneously to have larger electric energy storage capacity, so that portability and use flexibility of the energy storage device are improved.
In an embodiment, the first energy storage unit and the second energy storage unit comprise electrical cores of different material types; the mass of the first energy storage unit is larger than that of the second energy storage unit; and/or the rated energy storage capacity of the first energy storage unit is larger than the rated energy storage capacity of the second energy storage unit.
In an embodiment, the second module further includes a switch unit, and the switch unit is connected to the first energy storage unit, the second energy storage unit, and the power conversion unit, respectively; the switch unit has a first switch state and a second switch state; when the switch unit is in a first switch state, the first energy storage unit and the second energy storage unit are connected in parallel; when the switch unit is in a second switch state, the first energy storage unit and the second energy storage unit are connected in series.
In an embodiment, the second module further comprises a control unit; the control unit is connected with the power conversion unit and the switch unit; the control unit is used for controlling the state of the switch unit and the state of the power conversion unit according to the received operation control.
In an embodiment, the power conversion unit is configured to convert the dc power output by the second energy storage unit and output the ac power at the first output power when the first module and the second module are detached.
In an embodiment, the power conversion unit is configured to, when the first module is connected to the second module, convert the dc power output by at least one of the first energy storage unit and the second energy storage unit, and output an ac power at a second output power; the second output power is greater than the first output power.
In an embodiment, the power conversion unit is further configured to stop converting the direct current output by the first energy storage unit and/or the second energy storage unit when the electric quantity of the first energy storage unit and/or the electric quantity of the second energy storage unit are/is less than or equal to a preset electric quantity threshold.
In an embodiment, the power conversion unit is further configured to, when the electric quantity of the first energy storage unit and the electric quantity of the second energy storage unit are both less than or equal to a preset electric quantity threshold, convert a power supply electric signal input by the charging device, and then output direct current to charge the second energy storage unit preferentially.
In an embodiment, the power conversion unit is further configured to switch, when the first module is connected to the second module and only one energy storage unit is in a discharging state, the other energy storage unit to enter the discharging state if the failure of the energy storage unit in the discharging state is detected.
In a second aspect, an embodiment of the present utility model provides an energy storage system including the energy storage device described above.
Drawings
Fig. 1 is a schematic diagram of an energy storage device according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram of an energy storage system according to an embodiment of the present utility model.
Fig. 3 is a schematic diagram of another energy storage system according to an embodiment of the present utility model.
Detailed Description
The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In describing embodiments of the present utility model, words such as "exemplary," "or," "such as," and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "or," "such as," and the like are intended to present related concepts in a concrete fashion.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. It is to be understood that, unless otherwise indicated, a "/" means or. For example, A/B may represent A or B. The "and/or" in the present utility model is merely one association relationship describing the association object, indicating that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist simultaneously, and B exists alone. "at least one" means one or more. "plurality" means two or more than two. For example, at least one of a, b or c may represent: seven cases of a, b, c, a and b, a and c, b and c, a, b and c.
Referring to fig. 1, an exemplary schematic diagram of an energy storage device according to various embodiments of the present utility model is shown.
As shown in fig. 1, an embodiment of the present utility model provides an energy storage device 100 with mobility, electrical energy storage, and charge/discharge functions. In an embodiment, the energy storage device 100 may be a mobile power device.
The energy storage device 100 may be connected to a charging device to receive a power supply signal of the charging device for charging; the energy storage device 100 may be connected to a load to power the load. It will be appreciated that the charging mode may be entered when the energy storage device 100 is connected to a charging device and the discharging mode may be entered when the energy storage device 100 is connected to a load. When the energy storage device 100 is connected with the charging device and the load at the same time, if the power supply power of the charging device is greater than the required power of the load, the energy storage device 100 can be charged by using the residual power while the load is electrified by the charging device; if the power supplied by the charging device is smaller than the required power of the load, the energy storage device 100 and the charging device jointly supply power to the load at this time, and the energy storage device 100 works in a discharging mode at this time.
The energy storage device 100 comprises a first module 10 and a second module 20. The first module 10 is detachably connected with the second module 20. When the first module 10 and the second module 20 are detached, the first module 10 and the second module 20 can be separated into two independent mobile power sources. When the first module 10 is connected to the second module 20, the first module 10 and the second module 20 are combined to form an integral mobile power supply.
It will be appreciated that the first module 10 and the second module 20 may be detachably connected by a buckle, a chute, a screw fastening structure, etc., and may be electrically detachably connected by a power line, a pin header, etc., which is not limited by the present utility model. In an embodiment, the first module 10 is provided with a parallel connection interface, the second module 20 is also provided with a corresponding parallel connection interface, and the parallel connection interfaces on the first module 10 and the second module 20 are connected through a power line to realize the electrical connection of the two.
The first module 10 comprises a first energy storage unit 12. The first energy storage unit 12 is used for storing electric energy and performing charging and discharging. That is, in an embodiment, the first module 10 only includes the first energy storage unit 12 and the parallel connection interface, so the first module 10 has no independent load function, only has a battery pack function, and needs to be connected to the second module 20 for use. In another embodiment, the first module 10 may further be provided with an output interface for connecting to a load, where the first module 10 may still independently discharge the load after being disassembled.
The second module 20 includes a second energy storage unit 22 and a power conversion unit 24. The power conversion unit 24 is electrically connected with the second energy storage unit 22. The second energy storage unit 22 is used for storing electric energy and performing charging and discharging. The power conversion unit 24 is used for charging and discharging the second energy storage unit 22 when the first module 10 is detached from the second module 20.
In an embodiment, when the energy storage device 100 is connected to a load, the power conversion unit 24 converts the dc power output by the second energy storage unit 22 and outputs ac power at the first output power to supply power to the load. When the energy storage device 100 is connected to a charging device, the power conversion unit 24 converts a power supply electrical signal input by the charging device and outputs a direct current to charge the second energy storage unit 22.
When the first module 10 is connected to the second module 20, the power conversion unit 24 is also electrically connected to the first energy storage unit 12 to charge and discharge at least one of the first energy storage unit 12 and the second energy storage unit 22. In an embodiment, when the energy storage device 100 is connected to a load, the power conversion unit 24 converts the dc power output by at least one of the first energy storage unit 12 and the second energy storage unit 22, and then outputs the ac power at the second output power to supply the load with power. When the energy storage device 100 is connected to a charging device, the power conversion unit 24 converts a power supply electrical signal input from the charging device and outputs a direct current to charge at least one of the first energy storage unit 12 and the second energy storage unit 22. In one embodiment, the second output power is greater than the first output power. In an embodiment, the power conversion unit 24 charges and discharges at least one of the first energy storage unit 12 and the second energy storage unit 22, which is understood that the power conversion unit 24 charges and discharges the first energy storage unit 12 or the second energy storage unit 22 separately or charges and discharges the first energy storage unit 12 and the second energy storage unit 22 simultaneously.
The first energy storage unit 12 and the second energy storage unit 22 may comprise cells of different material types, and the energy density of the second energy storage unit 22 is greater than the energy density of the first energy storage unit 12. In one embodiment, the first energy storage unit 12 may include, but is not limited to, a lithium iron phosphate battery or a ternary lithium battery, and the second energy storage unit 22 may include, but is not limited to, a semi-solid state battery. Since the energy density of the second energy storage unit 22 is greater than the energy density of the first energy storage unit 12, the mass of the second energy storage unit 11 is smaller than the mass of the first energy storage unit 12 in case of the same energy storage capacity, and/or the rated energy storage capacity of the first energy storage unit 12 is greater than the rated energy storage capacity of the second energy storage unit 22 in case of the same mass. Thus, the second module 20 may be used alone when the first module 10 is detached from the second module 20. Because the second module 20 has smaller mass, the portable electronic device is more suitable for some application scenes needing to be carried, such as outdoor scenes. When the first module 10 is connected with the second module 20, the first module 10 and the second module 20 are used in combination for charging and discharging, so that the energy storage capacity is larger, and the energy storage device is more suitable for application scenes needing larger electricity consumption, such as home scenes. In one embodiment, the rated energy storage capacity of the first energy storage unit 12 may be, but is not limited to, 5 kilowatt-hours (kWh) and the rated energy storage capacity of the second energy storage unit 22 may be, but is not limited to, 1 kilowatt-hour.
As shown in fig. 1, the second module 20 further includes a switching unit 26. The switching unit 26 is electrically connected to the second energy storage unit 22 and the power conversion unit 24, respectively. The switching unit 26 is also electrically connected to the first energy storage unit 12 when the first module 10 is connected to the second module 20. The switching unit 26 has a first switching state and a second switching state. When the switching unit 26 is in the first switching state, the first energy storage unit 12 and the second energy storage unit 22 are connected in parallel; when the switching unit 26 is in the second switching state, the first energy storage unit 12 and the second energy storage unit 22 are connected in series. It will be appreciated that when the first energy storage unit 12 and the second energy storage unit 22 are connected in series, the first energy storage unit 12 and the second energy storage unit 22 may provide a larger voltage; when the first energy storage unit 12 and the second energy storage unit 22 are connected in parallel, the first energy storage unit 12 and the second energy storage unit 22 can provide a larger current and a larger capacity. Thus, the energy storage device 100 can provide different power supply output options to adapt to different application scenarios and power requirements.
In an embodiment, the switching unit 26 may also have a third switching state and a fourth switching state. When the switching unit 26 is in the third switching state, the power conversion unit 24 charges and discharges the second energy storage unit 22 separately; when the switching unit 26 is in the fourth switching state, the power conversion unit 24 charges and discharges the first energy storage unit 12 separately. It can be appreciated that by controlling the switching unit 26 to enter the third switching state or the fourth switching state, the power conversion unit 24 can switchably charge and discharge the second energy storage unit 22 or the first energy storage unit 12 individually, so that when any one of the second energy storage unit 22 or the first energy storage unit 12 fails, the other one of the second energy storage unit 22 or the first energy storage unit 12 can be switchably used, thereby improving the reliability of the energy storage device 100.
When the energy storage device 100 is connected to a load, the first module 10 is connected to the second module 20, and only one energy storage unit is in a discharging state, that is, the switch unit 26 is in a third switch state or a fourth switch state, and when the first energy storage unit 12 or the second energy storage unit 22 is used for independently supplying power to the load, if it is detected that the energy storage unit in the discharging state fails, the switch unit 26 can switch states to switch the other energy storage unit to enter the discharging state. The power conversion unit 24 converts the direct current output by the other energy storage unit to output alternating current, so as to continuously supply power to the load, thereby improving the reliability of the energy storage device 100.
As shown in fig. 1, the second module 20 further includes a control unit 28. The control unit 28 is electrically connected to the power conversion unit 24 and the switching unit 26. The control unit 28 is configured to control the state of the power conversion unit 24 and the state of the switching unit 26 according to the received control operation. In an embodiment, the control unit 28 may receive a control operation of a user through a user interface or physical keys provided by the energy storage device 100, and switch the state of the power conversion unit 24 and the state of the switching unit 26 according to the received control operation. For example, the control unit 28 controls the switching unit 26 to enter the first, second, third or fourth switching state and controls the charge-discharge switching state of the power conversion unit 24.
When the energy storage device 100 discharges to the connected load, the control unit 28 is further configured to control the power conversion unit 24 to stop converting the dc power output by the first energy storage unit 12 and/or the second energy storage unit 22 when the electric quantity of the first energy storage unit 12 and/or the electric quantity of the second energy storage unit 22 are less than or equal to the preset electric quantity threshold. In an embodiment, the first energy storage unit 12 and the second energy storage unit 22 are each provided with a preset charge threshold, for example, the preset charge threshold may be, but is not limited to, 10% of the rated energy storage capacity. It can be appreciated that when the electric quantity of the first energy storage unit 12 and/or the second energy storage unit 22 is less than or equal to the preset electric quantity threshold, the first energy storage unit 12 and/or the second energy storage unit 22 is stopped, so that damage caused by too low electric quantity of the first energy storage unit 12 and/or the second energy storage unit 22 is avoided, and the service life of the first energy storage unit 12 and/or the second energy storage unit 22 can be effectively prolonged.
When the energy storage device 100 is charged by the connected charging device, the control unit 28 is further configured to control the power conversion unit 24 to convert the power supply electrical signal input by the charging device and output direct current to charge the second energy storage unit 22 preferentially when the electric quantity of the first energy storage unit 12 and the electric quantity of the second energy storage unit 22 are both less than or equal to the preset electric quantity threshold. In an embodiment, when the first energy storage unit 12 and the second energy storage unit 22 both need to be charged, and the two do not meet the simultaneous charging requirement, for example, the voltage difference between the first energy storage unit 12 and the second energy storage unit 22 is not within the preset range, the power conversion unit 24 preferably charges the second energy storage unit 22, and the energy density of the second energy storage unit 22 is greater than that of the first energy storage unit 12, so that the usability of the second energy storage unit 22 is preferably ensured under certain conditions, and the energy storage device 100 can be lighter in weight when detached for use.
In an embodiment, the charging device may be, but is not limited to being, a solar panel Photovoltaic (PV) charging device or a Direct Current (DC) source charging device.
The control unit 28 is also adapted to receive a setting operation according to which an output power threshold value of the discharge of the first module 10 and/or the second module 20 is set, when the energy storage device 100 is discharged to the connected load. For example, when the first module 10 is detached from the second module 20, a first output power threshold for the second module 20 to discharge alone may be set; when the first module 10 is connected to the second module 20, a second output power threshold value for the common discharge of the first module 10 and the second module 20 may be set, and the first output power threshold value is smaller than the second output power threshold value, so that a power supply period when the second module 20 is separately discharged may be ensured.
In an embodiment, the control unit 28 may feed back the current output power threshold and the dischargeable duration under the current power, the user may perform a control operation according to the prompt of the dischargeable duration, and the control unit 28 may control and adjust the output power threshold of the discharge of the first module 10 and/or the second module 20 according to the received operation. In an embodiment, when the current power is less than or equal to the preset de-rated power threshold, the control unit 28 feeds back the current output power threshold and the dischargeable duration under the current power, and when no operation control is received within the preset time, the control unit 28 may further automatically reduce the output power threshold of the discharge of the first module 10 and/or the second module 20, so as to enable the discharge of the first module 10 and/or the second module 20 to perform the de-rating output.
The energy storage device 100 provided by the embodiment of the utility model is detachably connected with the second module 20 through the first module 10, so that the first module 10 and the second module 20 can be used independently or in a connecting way, and when the first module 10 and the second module 20 are detached, only the second module 20 is used conveniently; when the first module 10 is connected to the second module 20, the power conversion unit 24 may charge and discharge at least one of the first energy storage unit 12 and the second energy storage unit 22, and the first module 10 and the second module 20 may be used simultaneously to have a larger capacity for storing electric energy, thereby improving portability and flexibility of use of the energy storage device 100.
Referring to fig. 2, the embodiment of the utility model provides a further energy storage system, which includes an energy storage device 100 and a charging device 200, wherein when the energy storage device 100 is connected to the charging device 200, the energy storage device 100 can receive the power supplied by the charging device 200 for charging.
Referring to fig. 3, an embodiment of the present utility model provides an energy storage system, which includes an energy storage device 100 and a load 300, wherein when the energy storage device 100 is connected to the load 300, the energy storage device 100 can discharge to the load 300 to supply power to the load 300.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.
In the several embodiments provided in the present utility model, it should be understood that the disclosed system may be implemented in other manners. For example, the system embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units described above may be implemented either in hardware or in software functional units.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, appropriate modifications and variations of the above embodiments should be included within the scope of the utility model as hereinafter claimed.
Claims (10)
1. An energy storage device, the energy storage device comprising:
a first module including a first energy storage unit;
the second module is detachably connected with the first module and comprises a second energy storage unit and a power conversion unit, and the power conversion unit is electrically connected with the second energy storage unit;
when the first module is connected with the second module, the power conversion unit is also electrically connected with the first energy storage unit so as to charge and discharge at least one energy storage unit of the first energy storage unit and the second energy storage unit;
the energy density of the second energy storage unit is greater than the energy density of the first energy storage unit.
2. The energy storage device of claim 1, wherein: the first energy storage unit and the second energy storage unit comprise electric cores of different material types;
the mass of the first energy storage unit is larger than that of the second energy storage unit; and/or
The rated energy storage capacity of the first energy storage unit is larger than the rated energy storage capacity of the second energy storage unit.
3. The energy storage device of claim 1, wherein the second module further comprises a switching unit connected to the first energy storage unit, the second energy storage unit, and the power conversion unit, respectively; the switch unit has a first switch state and a second switch state; when the switch unit is in a first switch state, the first energy storage unit and the second energy storage unit are connected in parallel; when the switch unit is in a second switch state, the first energy storage unit and the second energy storage unit are connected in series.
4. An energy storage device according to claim 3, wherein: the second module further comprises a control unit; the control unit is connected with the power conversion unit and the switch unit; the control unit is used for controlling the state of the switch unit and the state of the power conversion unit according to the received operation control.
5. The energy storage device of claim 2, wherein: the power conversion unit is used for converting the direct current output by the second energy storage unit and outputting alternating current with first output power when the first module and the second module are detached.
6. The energy storage device of claim 5, wherein: the power conversion unit is used for converting direct current output by at least one of the first energy storage unit and the second energy storage unit when the first module is connected with the second module, and outputting alternating current with second output power;
the second output power is greater than the first output power.
7. The energy storage device of claim 3, wherein the energy storage device comprises,
the power conversion unit is further configured to stop converting the direct current output by the first energy storage unit and/or the second energy storage unit when the electric quantity of the first energy storage unit and/or the electric quantity of the second energy storage unit are/is smaller than or equal to a preset electric quantity threshold value.
8. The energy storage device of claim 7, wherein the power conversion unit is further configured to convert a power supply electrical signal input by the charging device and output direct current to charge the second energy storage unit preferentially when the electric quantity of the first energy storage unit and the electric quantity of the second energy storage unit are both less than or equal to a preset electric quantity threshold.
9. The energy storage device of claim 1, wherein the power conversion unit is further configured to switch, when the first module is connected to the second module and only one energy storage unit is in a discharge state, the other energy storage unit to enter the discharge state if a failure of the energy storage unit in the discharge state is detected.
10. An energy storage system comprising an energy storage device as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321038675.6U CN220043018U (en) | 2023-04-28 | 2023-04-28 | Energy storage device and energy storage system |
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| CN202321038675.6U CN220043018U (en) | 2023-04-28 | 2023-04-28 | Energy storage device and energy storage system |
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| CN220043018U true CN220043018U (en) | 2023-11-17 |
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| CN202321038675.6U Active CN220043018U (en) | 2023-04-28 | 2023-04-28 | Energy storage device and energy storage system |
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Address after: 518000 Factory Building 401, Runheng Industrial Plant 1, Fuyuan Road, Zhancheng Community, Fuhai Street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region after: China Address before: 518000, 1st Floor, Building E, Jiehe Industrial City, Shuitian Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region before: China |