CN111446755A - Capacity-expandable hot-plug type battery power supply system and control method - Google Patents
Capacity-expandable hot-plug type battery power supply system and control method Download PDFInfo
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- CN111446755A CN111446755A CN202010256629.8A CN202010256629A CN111446755A CN 111446755 A CN111446755 A CN 111446755A CN 202010256629 A CN202010256629 A CN 202010256629A CN 111446755 A CN111446755 A CN 111446755A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/36—Arrangements using end-cell switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- Power Engineering (AREA)
- Business, Economics & Management (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an expandable hot-plug type battery power supply system and a control method, comprising an inverter box and at least one battery box; the contravariant case includes: the system comprises an inversion module, a charging module, an alternating current output port and an alternating current input port; the battery box includes: the communication interface is used for constructing a distributed network of the battery box and switching the battery box for supplying power or charging through the distributed network; according to the technical scheme, the battery box is separated from the inverter box, data exchange and updating are completed between the battery boxes through a distributed network, power supply or charging switching of the battery box is independently completed without other management and control devices or central processing units, and hot plugging and unplugging operation of the battery box can be further achieved based on the distributed network.
Description
Technical Field
The invention relates to the technical field of power storage, in particular to an expandable hot-plug type battery power supply system and a control method.
Background
With the global climate change problem, the reduction of non-renewable energy, electric energy is widely advocated as a clean green energy. However, the method is limited by the fact that under some conditions and occasions, alternating current cannot be directly transmitted, and the alternating current is obtained by inverting the alternating current through a battery carrier and direct current. Lithium batteries are widely used in energy storage systems due to their excellent properties such as high energy density, long service life, and no memory effect. The lithium battery forms a battery pack in a series-parallel connection mode, the battery pack is managed by a Battery Management System (BMS), and an electric power supply system is formed by matching with an electronic circuit, so that the problem of power supply of places where most electric energy cannot directly reach can be solved, and the alternating current power supply system is developed by being applied to places such as construction sites, medical centers, communication base stations and natural disasters.
However, the energy storage device or system of the current lithium battery still has the following technical problems:
1) the expandable and poor sustainable performance directly results in the whole energy storage device not providing enough electric energy to support long-time operation.
2) The hot plug operation is not supported, and the selection of which battery pack to discharge needs to be judged and determined by the central processing unit, so that the efficiency is low, and the reliability is poor.
3) The mode of parallel power supply of the battery pack is adopted, so when in use, if the voltage of the battery pack is not kept consistent, circulation current is easy to generate,
causing damage to the battery.
Disclosure of Invention
To solve one of the above technical problems, the present invention aims to: the expandable hot-plug type battery power supply system and the control method thereof are convenient to operate and high in safety.
The technical scheme adopted by the invention is as follows:
a capacity-expandable hot-plug type battery power supply system comprises an inverter box and at least one battery box; the contravariant case includes:
the inversion module is used for converting the direct current into alternating current;
the charging module is used for converting alternating current into direct current;
the alternating current output port is used for inputting alternating current;
the alternating current input port is used for outputting alternating current;
the battery box includes:
the power supply port is used for connecting the battery box to the inverter box;
the communication interface is used for constructing a distributed network of the battery box and switching the battery box for supplying power or charging through the distributed network;
the inversion module is connected with the alternating current output port; the charging module is connected with the alternating current input port; the battery box is connected with the inverter box through a power supply port.
Further, the contravariant case still includes:
the first bus bar and the second bus bar are used for being connected with a power interface of at least one battery box and receiving electric energy of the battery box or providing the electric energy for the battery box;
the inversion starting switch is used for starting or closing the inversion module;
the battery box is respectively connected with one end of the first bus bar and one end of the second bus bar; the other end of the first bus bar is respectively connected with the input end of the inversion module and the output end of the charging module; the other end of the second bus bar is respectively connected with the input end of the inversion module and the output end of the charging module; the output end of the inversion module is connected with the alternating current output port, and the starting switch signal receiving end of the inversion module is connected with the inversion starting switch; the input end of the charging module is connected with the alternating current input port.
Further, the battery box still includes:
a battery pack for storing or discharging electric energy;
the BMS module is used for monitoring and acquiring the voltage and the temperature of the battery;
the CPU processor is used for receiving signals and sending down control signals;
a DC/DC converter for outputting a fixed voltage;
the fan is used for cooling the battery box;
the main power switch is used for starting or closing the power input, the power output and the communication of the battery box;
an output control switch; a power output for turning on or off the battery box;
the output control switch is connected with the output control end of the CPU processor; the communication interface of the battery box is connected with the first communication port of the CPU processor; the second communication port of the CPU processor is connected with the BMS module, and the control port of the CPU processor is connected with the DC/DC converter; the information acquisition port of the BMS module is connected with the battery pack; the positive electrode of the battery pack is respectively connected with the first input end of the DC/DC converter and the positive electrode of the power supply port; the negative electrode of the battery pack is respectively connected with the second input end of the DC/DC converter and the negative electrode of the power supply port, the fan control port of the DC/DC converter is connected with the fan, the main power supply control port of the DC/DC converter is connected with the main power supply switch, and the interlocking signal port of the DC/DC converter is connected with the power supply port.
Further, the battery box still includes: the backflow prevention module and the main relay are used for preventing current from flowing backwards;
the input end of the backflow prevention module is connected with the anode of the battery pack; the output end of the backflow prevention module is connected with the positive pole of the main relay, a first control port of the backflow prevention module is connected with the CPU processor, a second control port of the backflow prevention module is connected with the DC/DC converter, and a pre-charging port of the backflow prevention module is connected with the positive pole of the power supply port; and the negative electrode of the main relay is connected with the positive electrode of the power port, and the two ends of the coil of the main relay are connected with the control port of the main controller of the DC/DC converter.
Further, the battery box also comprises a fuse used for protecting the circuit when the circuit is abnormal;
one end of the fuse is connected with the input end of the backflow prevention module, and the other end of the fuse is connected with the anode of the battery pack.
Further, the battery box also comprises a display device, and the display device is connected with the CPU processor.
Further, the battery box and the battery box are connected and communicated through the CAN.
Further, the bottom of the battery box is provided with a pulley.
The other technical scheme adopted by the invention is as follows:
acquiring the number, the electric charge quantity and the temperature of the currently connected battery boxes;
selecting a battery box to supply power according to the charge quantity and the temperature;
updating the number, charge level and temperature of the battery boxes through a distribution network;
and switching to the battery boxes to supply power according to the updated number, charge amount and temperature of the battery boxes.
Further, the step of updating the number, the charge amount, and the temperature of the battery boxes through a distribution network specifically includes:
the battery box forms a distributed network through CAN communication;
acquiring the charge quantity and the temperature of the battery box;
and updating the charge quantity and the temperature of the battery boxes in the distributed network, and acquiring the number of the battery boxes.
The invention has the beneficial effects that: according to the technical scheme, the battery box is separated from the inverter box, data exchange and updating are completed between the battery boxes through a distributed network, power supply or charging switching of the battery box is independently completed under the condition of not using other control devices or central processing units, and hot plugging and unplugging operation of the battery box can be further achieved based on the distributed network, so that the system has good expansion performance, and can complete convenient, intelligent and efficient power supply.
Drawings
FIG. 1 is a schematic diagram illustrating a connection relationship between a battery box and an inverter box of the capacity-expandable hot-plug type battery power supply system according to the present invention;
FIG. 2 is a schematic circuit diagram of the interior of an inverter box of the capacity-expandable hot-plug type battery power supply system according to the present invention;
FIG. 3 is a schematic circuit diagram of the interior of a battery box of the expandable hot-plug type battery power supply system according to the present invention;
FIG. 4 is a layout diagram of a battery box panel of the expandable hot-plug type battery power supply system according to the present invention;
FIG. 5 is a flowchart illustrating steps of a method for controlling power supply of an expandable hot-pluggable battery power supply according to the present invention.
Reference numerals: 101. a main power switch; 102. a power port; 103. a fan; 104. an output control switch; 105. a display device; 106. a communication interface; 201. a first bus bar; 202. a second bus bar.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
The invention mainly comprises two parts, namely an inverter box and a battery box, as shown in fig. 1, the specification selects four battery boxes and one inverter box as a specific embodiment for description, and the four battery boxes are respectively connected with a first battery box interface CH1, a second battery box interface CH2, a third battery box interface CH3 and a fourth battery box interface CH4 of the inverter box.
As shown in fig. 2, the inverter module in the inverter box is used for converting the direct current provided by the power box into alternating current for each electrical appliance; the charging module is used for converting alternating current into direct current when the battery box is charged; the four battery boxes are connected with the battery box interfaces of the inverter box through power ports and are respectively connected to the input end of the inverter module and the output end of the charging module through a first bus bar 201 and a second bus bar 202, the first bus bar and the second bus bar are used for collecting positive and negative power boxes of the four battery boxes, are used for being connected with the power interface of at least one battery box, receive electric energy of the battery boxes or provide electric energy for the battery boxes, and play a role of relaying; the output end of the inversion module is connected to the alternating current output port and used for converting direct current stored in the battery box into alternating current to supply power to an electric appliance; the inlet and outlet end of the charging module is connected with the alternating current input port and used for converting external alternating current into direct current of the battery pack and providing power supply for charging the battery; in addition, the inversion box is also provided with an inversion starting switch, and the inversion starting switch is connected to a switch signal receiving end of the inversion module and used for controlling whether the inversion module works, namely whether the battery box provides a power supply. And the alternating current output port and the alternating current input port are mainly used for outputting and inputting current to the battery box.
As shown in fig. 3, the battery box mainly includes a battery pack inside for storing or discharging electric energy; the positive electrode and the negative electrode of the battery pack are connected to the power supply port, and the battery pack supplies direct current to the inverter box or receives the direct current supplied by the inverter box for storage; one end of the BMS module is connected to the battery pack, the other end (communication end) of the BMS module is connected with a second communication end of the CPU processor and is used for monitoring and acquiring voltage and temperature information of the battery pack, transmitting an abnormal signal to the CPU processor when the voltage and/or temperature of the battery pack is abnormal, and sending an abnormal alarm by the CPU processor; the CPU module is the core of the battery box and is used for receiving signals of other modules and sending control signals, and meanwhile, the CPU module also plays a role in keeping communication connection with other battery boxes, so that the whole battery box has the functions of overload protection, over-temperature protection, under-voltage protection, overvoltage protection, short-circuit protection and the like; the first communication port of the CPU processor is connected with the communication interface of the battery box, the second communication port is connected with the BMS module, the control port of the CPU processor is connected with the DC/DC converter, and meanwhile, the output control end of the CPU processor is connected with an output control switch which can control whether the power box supplies power to the outside; the battery box also comprises a DC/DC converter which converts the voltage of an external power supply into the limited voltage of the battery pack when the battery box is charged; when the battery box discharges, the power supply voltage of the battery pack is converted into a fixed voltage correspondingly received by the inversion module of the inversion box; the input end of the converter is connected to the positive and negative electrodes of the battery pack. A fan control port of the DC/DC converter is connected with a fan and used for radiating the whole battery box; a main power control port of the converter is connected with the main power switch, and the main power switch is used for controlling whether the whole battery box works (power supply function and communication function); and the DC/DC converter interlocking signal port is connected with the power supply port and is used for receiving a signal of the current inverter connected with the battery box and enabling the battery box to enter a communication state or a waiting state. In addition, the battery box is also provided with an output control switch for independently controlling whether the battery box supplies power. The output control switch is directly connected with a CPU processor in the battery box, and the CPU processor issues a control signal (instruction) to complete the on or off of power supply.
The battery box in the embodiment further comprises a backflow prevention module, a main relay, a fuse and a display device; the two control ports which prevent backflow are respectively connected with the DC/DC converter and the CPU, the output end of the control port is connected with the anode of the main relay, the input end of the control port is connected with the fuse and then connected to the anode of the battery pack, and the fuse is used for fusing when the circuit generates abnormal (exceeds a specified value) current and plays a role in protecting the circuit; the negative pole of the main relay is connected to the positive pole of the power port of the battery box, the coil of the main relay is connected to the control port of the main controller of the DC/DC converter, the main relay is used for cutting off the circuit according to the signal of the control port of the main controller when the battery box has a backward flow phenomenon, and the main relay also plays a role in protecting the circuit of the battery box; the pre-charging port of the backflow prevention module is also connected to the power supply port and is also used for avoiding the backflow phenomenon caused by the fact that other battery boxes supply power to the battery box when the power supply is stopped; meanwhile, pre-charging can be carried out when the current is low; the display device is connected to a signal output port of the CPU processor and used for displaying the working state and the state of charge (SOC) of the battery box.
As an implementation mode, the battery box and the battery box construct a distributed network through a distributed communication system constructed by a CAN (controller area network), information intercommunication between the battery box and the battery box is completed, the CAN communication CAN enable the battery boxes of different nodes in the distributed network structure to receive the same data at the same time, the communication real-time performance is higher, the formed redundancy structure CAN improve the reliability and flexibility of the system, and the communication mode has higher practicability compared with a communication mode that RS485 communication CAN only constitute a master-slave mode and master station polling.
As an embodiment, as shown in fig. 4, the bottom of the battery box is provided with pulleys, so that the battery box is convenient to carry and transport, and at the same time, a main power switch 101, a power port 102 and a fan 103 are arranged on one side (back side) of the battery box; on the other side of the battery box, an output control switch 104, a display device 105 and two communication interfaces 106 are provided.
As shown in fig. 5, an embodiment of a control method for power supply of an expandable hot-pluggable battery power supply provided in this embodiment includes the steps of:
acquiring the number, the electric charge quantity and the temperature of the currently connected battery boxes;
selecting a battery box to supply power according to the charge quantity and the temperature;
updating the number, charge level and temperature of the battery boxes through a distribution network;
and switching to one of the other battery boxes to supply power according to the updated number, charge amount and temperature of the battery boxes.
Further, as an optional implementation:
the step of updating the number, the charge amount and the temperature of the battery boxes through a distributed network specifically comprises the following steps: the battery box forms a distributed network through CAN communication; acquiring the charge quantity and the temperature of the battery box; and updating the charge quantity and the temperature of other battery boxes in the network through the distributed network, and acquiring the number of the battery boxes.
The operation process and corresponding technical effects of the embodiment of the method are explained in detail with reference to the embodiment of the system:
the embodiment of the method also selects a battery power supply system consisting of four battery boxes and an inverter box, the four battery boxes are simultaneously connected with the inverter box, a Battery Management System (BMS) of each battery box calculates the state of charge (SOC) and the temperature of the battery by a battery voltage and current integration method (ampere-hour integration method), then the CPU of each battery box system obtains the number of the connected battery boxes and the state of charge (SOC) and the temperature of each battery box by CAN communication, thereby selecting the battery box with the highest SOC and the temperature in the optimal working range for power supply, selecting the battery box as a main control unit, when the electric quantity is close to the use up (less than 2%), the system judges the number of the connected battery boxes, the SOC and the temperature again, automatically switching to the battery box with the highest SOC and the temperature in the optimal working range for power supply continuously, and withdrawing the used battery box, and can be replaced.
The battery box that electric quantity runs out can pull out the wiring, changes new battery box, waits for system connection command, continues the power supply, and at plug battery box in-process, the dc-to-ac converter still can continue work, provides the alternating current, realizes continuous uninterrupted power supply. The main control unit of the battery box CAN regularly perform data communication with other connected battery boxes through the CAN, updates the connection quantity and the SOC and the temperature of the other battery boxes, ensures continuous power supply and necessary switching operation, and even if the SOC is higher when the battery box is just connected, the battery box cannot be switched immediately due to later access. The charging of the battery pack is also carried out independently, and the calculation processing by a central processing unit is not needed. The whole judgment network is jointly determined through the distributed network, so that the reliability is higher, the accuracy is higher, and even if a certain battery box fails, the system cannot stop working or safety accidents cannot be caused.
The system can also be manually operated, and an operator selects a battery box with enough electric quantity to supply power through a key output control switch on site, so that other battery boxes are in a waiting state and can be disconnected.
In the embodiment, the hot plug function is realized mainly by mutual independence of hardware systems of the battery boxes and mutual real-time communication, for example, the battery box A, B is connected to the inverter box, the battery box A is in a working state, the battery box B is in a laying state, at the moment, if the battery box B is disconnected and the battery box C is connected to the inverter box, a connector lock switch connected to the inverter box by the battery box B needs to be pressed, the connector is pulled out, and then the connector of the battery box C is connected to the inverter box; if want to let battery box A disconnection, battery box C connects at the contravariant case, then need press battery box A and connect the connector lock switch at the contravariant case, battery box A stop work at once, pull out the connector can, carry out the exchange and the affirmation of state data through distributed network between the battery box, confirm battery box B at once and start operating condition, realize incessant power supply, then insert the contravariant case with battery box C connector. The battery box that the electric quantity runs out can move to the place that has the alternating current and charge, resumes the electric quantity. The battery box has interlocking protect function, if the battery box is supplying power, the pilot lamp on the battery box is bright to show for a long time, if the user pulls out the wiring, battery box system disconnection to inform other battery boxes and connect the power supply.
In summary, compared with the prior art, the invention has the following advantages:
1) the invention has strong exhibition performance, supports hot plug and unplug, and can ensure safe, convenient and efficient power supply;
2) the battery box is accessed to a distributed communication network through the communication interface, and the battery box supplies power cooperatively, so that the system has higher reliability and is more accurate.
3) The battery box is light in structural design, the box bottom is provided with wheels, and the battery box is convenient to carry and transport and is attractive and elegant in overall appearance.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A capacity-expandable hot-plug type battery power supply system is characterized by comprising an inverter box and at least one battery box;
the contravariant case includes:
the inversion module is used for converting the direct current into alternating current;
the charging module is used for converting alternating current into direct current;
the alternating current output port is used for inputting alternating current;
the alternating current input port is used for outputting alternating current;
the battery box includes:
the power supply port is used for connecting the battery box to the inverter box;
the communication interface is used for constructing a distributed network of the battery box and switching the battery box for supplying power or charging through the distributed network;
the inversion module is connected with the alternating current output port; the charging module is connected with the alternating current input port; the battery box is connected with the inverter box through the power port.
2. The expandable hot-plug type battery power supply system according to claim 1, wherein the inverter box further comprises:
the first bus bar and the second bus bar are used for being connected with a power interface of at least one battery box and receiving electric energy of the battery box or providing electric energy for the battery box;
the inversion starting switch is used for starting or closing the inversion module;
the battery box is respectively connected with one end of the first bus bar and one end of the second bus bar; the other end of the first bus bar is respectively connected with the input end of the inversion module and the output end of the charging module; the other end of the second bus bar is respectively connected with the input end of the inversion module and the output end of the charging module; the output end of the inversion module is connected with the alternating current output port, and the starting switch signal receiving end of the inversion module is connected with the inversion starting switch; the input end of the charging module is connected with the alternating current input port.
3. The system of claim 1, wherein the battery box further comprises:
a battery pack for storing or discharging electric energy;
the BMS module is used for monitoring and acquiring the voltage and the temperature of the battery;
the CPU processor is used for receiving signals and sending down control signals;
a DC/DC converter for outputting a fixed voltage;
the fan is used for cooling the battery box;
the main power switch is used for starting or closing the power input, the power output and the communication of the battery box;
an output control switch; a power output for turning on or off the battery box;
the output control switch is connected with the output control end of the CPU processor; the communication interface of the battery box is connected with the first communication port of the CPU processor; the second communication port of the CPU processor is connected with the BMS module, and the control port of the CPU processor is connected with the DC/DC converter; the information acquisition port of the BMS module is connected with the battery pack; the positive electrode of the battery pack is respectively connected with the first input end of the DC/DC converter and the positive electrode of the power supply port; the negative electrode of the battery pack is respectively connected with the second input end of the DC/DC converter and the negative electrode of the power supply port, the fan control port of the DC/DC converter is connected with the fan, the main power supply control port of the DC/DC converter is connected with the main power supply switch, and the interlocking signal port of the DC/DC converter is connected with the power supply port.
4. An expandable hot-pluggable battery power supply system according to claim 3, wherein the battery box further comprises:
the backflow prevention module and the main relay are used for preventing current from flowing backwards;
the input end of the backflow prevention module is connected with the anode of the battery pack; the output end of the backflow prevention module is connected with the positive pole of the main relay, a first control port of the backflow prevention module is connected with the CPU processor, a second control port of the backflow prevention module is connected with the DC/DC converter, and a pre-charging port of the backflow prevention module is connected with the positive pole of the power supply port; and the negative electrode of the main relay is connected with the positive electrode of the power port, and the two ends of the coil of the main relay are connected with the control port of the main controller of the DC/DC converter.
5. The system of claim 4, wherein the battery box further comprises:
the fuse is used for protecting the circuit when the circuit is abnormal;
one end of the fuse is connected with the input end of the backflow prevention module, and the other end of the fuse is connected with the anode of the battery pack.
6. An expandable hot-plug type battery power supply system as claimed in claim 5, wherein said battery box further comprises a display device, said display device being connected to said CPU processor.
7. An expandable hot-plug type battery power supply system as claimed in any one of claims 1 to 6, wherein the battery box is connected to and communicates with the battery box via CAN.
8. An expandable hot-plug type battery power supply system as claimed in any one of claims 1 to 6, wherein the bottom of the battery box is provided with pulleys.
9. A control method for power supply of an expandable hot-plug type battery power supply is characterized by comprising the following steps:
acquiring the number, the electric charge quantity and the temperature of the currently connected battery boxes;
selecting a battery box to supply power according to the charge quantity and the temperature;
updating the number, charge level and temperature of the battery boxes through a distribution network;
and switching the battery boxes to supply power according to the updated number, the electric charge amount and the temperature of the battery boxes.
10. The method as claimed in claim 9, wherein the step of updating the number, the amount of charge, and the temperature of the battery boxes via a distribution network comprises:
the battery box forms a distributed network through CAN communication;
acquiring the charge quantity and the temperature of the battery box;
and updating the charge quantity and the temperature of the battery boxes in the distributed network, and acquiring the number of the battery boxes.
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| CN202010256629.8A CN111446755A (en) | 2020-04-02 | 2020-04-02 | Capacity-expandable hot-plug type battery power supply system and control method |
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| CN202010256629.8A CN111446755A (en) | 2020-04-02 | 2020-04-02 | Capacity-expandable hot-plug type battery power supply system and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649859A (en) * | 2022-05-18 | 2022-06-21 | 深圳市德兰明海科技有限公司 | Expandable energy storage system and expansion method thereof |
| CN115173534A (en) * | 2022-09-06 | 2022-10-11 | 深圳市驰普科达科技有限公司 | Outdoor power supply device, capacity-expanded battery device and outdoor power supply assembly |
-
2020
- 2020-04-02 CN CN202010256629.8A patent/CN111446755A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649859A (en) * | 2022-05-18 | 2022-06-21 | 深圳市德兰明海科技有限公司 | Expandable energy storage system and expansion method thereof |
| WO2023221709A1 (en) * | 2022-05-18 | 2023-11-23 | 深圳市德兰明海新能源股份有限公司 | Scalable energy storage system and scaling method thereof |
| CN115173534A (en) * | 2022-09-06 | 2022-10-11 | 深圳市驰普科达科技有限公司 | Outdoor power supply device, capacity-expanded battery device and outdoor power supply assembly |
| CN115173534B (en) * | 2022-09-06 | 2022-12-27 | 深圳市驰普科达科技有限公司 | Outdoor power supply device, capacity-expanded battery device and outdoor power supply assembly |
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