CN216599039U

CN216599039U - Movable variable electric quantity energy storage control circuit

Info

Publication number: CN216599039U
Application number: CN202122425628.4U
Authority: CN
Inventors: 吴远泽
Original assignee: Chogori Technology Co Ltd
Current assignee: Chogori Technology Co Ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-05-24
Anticipated expiration: 2031-10-09

Abstract

The utility model relates to a mobile variable electric quantity energy storage control circuit. The method comprises the following steps: the DC-DC module and the overvoltage and overcurrent protection module are respectively supplied with power by a storage battery, the overvoltage and overcurrent protection module is connected with the controller, the overvoltage and overcurrent protection module is used for protecting an input and output circuit from overvoltage, overcurrent, short circuit and undervoltage, the DC-DC circuit is used for converting low-voltage direct current input by the storage battery into 400V medium-voltage direct current for the DC-AC module to use, the DC-AC circuit is used for converting direct current into alternating current and is connected into an alternating current filtering module for filtering higher harmonics, the alternating current filtered by the alternating current filtering module is respectively connected to a load and is connected into the controller through the current detection and processing module, the controller is used for driving and controlling the DC-DC module through the PWM by the driving module, and the controller is used for controlling the DC-AC module through the SPWM.

Description

Movable variable electric quantity energy storage control circuit

Technical Field

The utility model belongs to the technical field of power supplies, and particularly relates to a mobile variable electric quantity energy storage control circuit for outdoor, emergency and microgrid power utilization.

Background

A large number of electric two-wheeled vehicle power-exchanging cabinets are arranged on the market at present, and a large number of idle full-power storage batteries are arranged in the power-exchanging cabinets. In order to change the power lithium battery limited to be used by a two-wheeled vehicle into a movable 220V life and outdoor power supply, the lithium battery of the two-wheeled vehicle is greatly expanded in use, and once electricity can drive an electric rice cooker to cook 5 pots of rice, and 6 films can be placed on a projector. Therefore, the power battery of the battery leasing company is not limited to the two-wheel vehicle market alone, and becomes a big charger capable of being called as 'shared 220'.

The new battery use approach can expand different purposes of one battery, and can enable a battery leasing company to have market expansion investment, thereby promoting the development of battery leasing and sharing, reducing the probability and risk of bringing the battery home for charging by consumers, and increasing the guarantee of the use safety of the power battery.

The traditional portable energy storage device mostly uses an internal electric core group, once the electric quantity of the internal electric core group is exhausted, the device needs to be moved to a place with commercial power for charging, and cannot be used continuously, so that inconvenience is brought to outing, normal life or entertainment; the rain condition is inevitable when people go out for life or entertainment, so the waterproof grade has certain requirements; the large-capacity energy storage device has certain weight, and long-distance movement is relatively laborious. Therefore, a mobile variable-capacity energy storage device is needed to solve the above problems.

CN201510257785.5 discloses an energy storage type mobile environment-friendly power generation equipment system, which aims to provide a high-capacity efficient environment-friendly power emergency backup and online support for various communication, finance, industry and performance business fields of power needing to be used movably by combining modern latest power electronic technology with green environment-friendly high-capacity intrinsic safety lithium iron phosphate and simultaneously utilizing the intelligent characteristics of relevant main components of the equipment. The intelligent green environment-friendly battery pack comprises a single chip microcomputer control system, a battery voltage control detection system, a plurality of green high-capacity battery monomers, a charge and discharge management and switch, a remote interface, a parallel operation interface and a human-computer interface, wherein the single chip microcomputer control system is respectively connected with the battery voltage control detection system, the charge and discharge management and switch, the remote interface, the parallel operation interface and the human-computer interface; each green high-capacity battery monomer adopts a plurality of groups which are connected in parallel or in series; the battery voltage control detection system is respectively connected with each green high-capacity battery monomer and used for monitoring the voltage of each green high-capacity battery monomer in real time; the single chip microcomputer control system can also monitor the current and the temperature of the battery pack during charging and discharging of the battery pack; the man-machine interface can display the basic working state and capacity of the battery. The battery charging management module has the disadvantages that the fixed battery and the battery charging management module are used, the battery has the limitation of charging and discharging times, and the battery is inconvenient to maintain or replace. CN201821576904.9 discloses a UPS removes energy storage power supply, its purpose provides a simple structure, reasonable in design, convenient to use's UPS removes energy storage power supply, and it uses the parallelly connected setting of multiunit lithium cell, has guaranteed the capacity of electric energy, can supply power for a long time, and it has installed the dc-to-ac converter additional, and adjustable voltage can supply power for domestic appliance, and it has installed multiple power supply socket additional, has enlarged application scope, and it can charge through municipal power supply, photovoltaic cell board, fills can diversification. The technical scheme includes that a lithium battery pack is fixedly arranged in a battery pack fixing plate which is fixedly arranged in an inner shell upper cover, an inner shell lower cover is fixedly arranged on the inner shell upper cover, an outer frame upper cover is arranged in front of the inner shell upper cover, an outer frame lower cover is arranged behind the inner shell lower cover, a PCBA controller is fixedly arranged in the inner shell upper cover, an inverter is fixedly arranged in the inner shell upper cover, a heat dissipation fan is fixedly arranged on the inner side wall of one side of the inner shell upper cover, an LED diffusion plate is embedded in the side wall of the other side of the inner shell upper cover, and a waterproof cover is arranged below the LED diffusion plate; it uses the parallelly connected setting of multiunit lithium cell, has guaranteed the capacity of electric energy, can supply power for a long time, and it has installed the dc-to-ac converter additional, and adjustable voltage can supply power for domestic appliance, and it has installed multiple power supply socket additional, has enlarged application scope, and it can charge through municipal power supply, photovoltaic cell board, fills can the diversification. The method has the disadvantages that the storage battery is not convenient to replace, needs a long time to be fully charged, usually needs about 10 hours to be charged, and can not fully utilize the idle shared storage battery.

CN202110154865.3 discloses a portable mobile standby box with replaceable electricity, which aims to provide a portable mobile standby box with replaceable electricity, wherein the voltage of a battery pack is converted from 48V, 60V or 72V into 220V commercial power through a dc-to-ac converter, so as to provide a power supply device for office computers, air warming equipment and the like, the battery pack adopts standardized batteries provided by a battery changing cabinet product, and is arranged in a box body in a plugging manner, so that the battery pack can be replaced when the electric quantity is low. The portable mobile standby power box with the replaceable power supply comprises a box body and a power supply, wherein the box body is provided with a mounting port for mounting and accommodating the power supply, the box body is provided with an output port, a direct current to alternating current converter is arranged in the box body, and the direct current to alternating current converter is electrically connected with the output port; the power supply is a battery pack, the battery pack is arranged in the mounting port in a replaceable manner, and the battery pack is a standardized battery pack in the power exchange cabinet; the output port is a panel socket, and the number of the panel sockets is more than or equal to 1. The portable battery has the disadvantages that the portable battery needs to be disassembled, the battery with large capacity generally has the weight of more than 10kg, and the portable battery is difficult to carry for long-distance movement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a mobile variable electric quantity energy storage control circuit which can exert the value of a replaceable battery of an electric two-wheeled vehicle, enrich an outdoor energy storage device and improve the problems of the traditional mobile energy storage, such as moving convenience and the like. The movable variable electric quantity energy storage control circuit successfully overcomes the defects in the prior art and develops the market of outdoor energy storage devices.

The technical scheme of the utility model is that the control circuit of the mobile variable electric quantity energy storage device is characterized by comprising a storage battery input end, a DC-DC module, a DC-AC module, an overvoltage and overcurrent protection module, a driving module, a controller, an alternating current filtering module, a current detection and processing module, an output voltage detection and processing module, a switch and a display screen module; the DC-DC modules are respectively powered by a replaceable storage battery and comprise overvoltage and overcurrent protection modules. The overvoltage and overcurrent protection module is used for protecting an input and output circuit from overvoltage, overcurrent, short circuit and undervoltage, the DC-DC circuit converts low-voltage direct current input by the storage battery into 400V medium-voltage direct current for the DC-AC module to use, the DC-AC circuit converts the direct current into alternating current, the LC circuit connected with the output end in series is used for filtering out higher harmonics, the alternating current filtered by the alternating current filtering module is electrically connected with an electric load, output electric energy information is fed back to the controller through output voltage detection and current detection, the controller controls the boosting of the DC-DC module through PFM modulation, and the controller controls the DC-AC module to output pure sine wave alternating current through SPWM modulation.

The device comprises a storage battery input end, a DC-DC module, a DC-AC module, an overvoltage and overcurrent protection module, a driving module, a controller, an alternating current filtering module, a current detection and processing module, an output voltage detection and processing module, a switch and a display screen module; the DC-DC module and the overvoltage and overcurrent protection module are respectively supplied with power by a storage battery, the overvoltage and overcurrent protection module is connected with the controller, the overvoltage and overcurrent protection module is used for protecting an input and output circuit from overvoltage, overcurrent, short circuit and undervoltage, the DC-DC circuit is used for converting low-voltage direct current input by the storage battery into 400V medium-voltage direct current for the DC-AC module to use, the DC-AC circuit is used for converting direct current into alternating current and is connected into the alternating current filtering module for filtering higher harmonics, the alternating current filtered by the alternating current filtering module is respectively connected to a load and is connected into the controller through the current detection and processing module, the controller is used for driving and controlling the DC-DC module through the PWM by the driving module, and the controller is used for controlling the DC-AC module through the SPWM.

Preferably, the method comprises the following steps: the output voltage detection and processing module is connected with the switch and the display screen module in parallel, and the output voltage detection and processing module, the switch and the display screen module which are connected in parallel are driven by the sine wave reference signal.

Preferably, the method comprises the following steps: the DC-DC control of the controller uses a soft switching technology to reduce the loss of the power device.

The mobile variable-electric-quantity energy storage device comprises an energy storage controller, a connector, a storage battery, an external interface board, a shell, (a pull rod and a universal wheel), a switch and a display screen.

The energy storage controller adopts the current mature sine wave inversion technology, the product reliability is high, the pure sine wave with the input direct current voltage range of 32-100V and the output frequency of 50Hz/60Hz and the effective value of 220V/110V can be realized, an interface board is arranged on the side of the box body, and a switch, an alternating current output interface and a USB output interface are arranged on the interface board.

The storage battery is different from a mobile energy storage device of most manufacturers on the market, adopts a built-in storage battery, uses a standard storage battery sharing battery replacement, and expands the application of the storage battery.

The connector, in order to match the switching interface of the battery of different sharing platforms, the patch cord can set up multiple adapter, convenient to use and change.

The external interface board is provided with a switch and a display screen, information is communicated and interacted through the serial port, the switch is used for controlling the discharge of the battery pack, and the display screen is used for displaying electric quantity and voltage.

The circuit connection is as shown in fig. 4, and consists of four parts, namely a DC-DC circuit, a DC-AC circuit, a filter circuit, an auxiliary circuit and a protection circuit. The control block diagram of the system is shown in fig. 5, the DC-DC circuit realizes the function of converting low-voltage direct current input by a storage battery into medium-voltage direct current of 400V grade for the inverter circuit to use, the LLC resonant circuit is used, the isolated circuit reduces surge impact, the high-frequency transformer and the soft switching technology reduce the volume of the controller and the loss of the power device, the DC-AC circuit realizes the function of converting direct current into alternating current, the filter circuit is used for filtering out higher harmonics, the protection circuit performs overvoltage, overcurrent, short circuit, undervoltage protection and other protection on the input and output circuit, the auxiliary circuit is used for feeding back signals to the control circuit, and the system mainly comprises an input interface, a voltage starting circuit, an MOS switch tube, a PWM drive, a direct current conversion circuit, a feedback circuit, an LC oscillation and output circuit, a protection circuit and the like. And (3) parallel operation control: the system adopts a software phase-locked loop to carry out the same frequency and same phase control of the system, the signals of Uref and Uf are shaped and sent to the MCU after being compared by the overvoltage comparator, the rising edges of the signals are captured by the capture modules CAP1 and CAP2 of the MCU chip timer, the frequency and the phase difference of the signals are measured, and then whether the frequencies are the same or not is judged, if the frequencies are different, the switching frequency is recalculated, so that the frequency is equal to fref. In the in-phase control algorithm, the delay time delta t of the MCU is judged by the MCU, and the pointer of the SPWM wavetable is adjusted to the corresponding position, so that the two signals are in phase. In the design, the SPWM carrier frequency is 25KHz, the SPWM interrupt interval is approximately 40us, the sine table is 500 points, and the electrical angle of each point corresponds to 2.88 degrees. The phase locking error does not exceed 0.5 percent, and the parallel operation control requirement of the system is completely met. The part is the mature technology used at present, and the reliability is guaranteed.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model expands the application field of the two-wheeled electric vehicle battery replacement battery and improves the added value of the battery replacement battery.

The storage battery is replaced through the quick plug-in connector, and quick battery replacement within 3 seconds is realized.

According to the utility model, the diversified variable-power multi-battery topological form meets the requirements of endurance or high-power application.

The shell provided with the support frame, the battery installation guide structure and the battery bin is provided with the shock absorption pad and the shock absorption wheels to protect the battery and the electronic device. The pull rod is removable accessory with the removal wheel, selects to change according to operating mode and is afraid of the climbing wheel, but directional wheel and universal wheel solve the heavier battery push-and-pull of large capacity, can walk up a ladder or climb, it is very convenient to carry the transport, can use people to carry for a long time and distance and feel not tired (can be according to the big or small apolegamy of stored energy), not be limited to concrete structure, (structural design is the light in weight of the very nimble little electric capacity of design, can not the apolegamy).

The utility model has high protection and high strength structural design, can reach IP56, adopts a high-protection IP 68-grade radiating fan, uses a sealing element and an IP68 connector, and is suitable for outdoor severe storms and severe sand and dust environments.

Sixthly, the multi-computer parallel machine control technology can meet the requirement of high-power application.

Drawings

FIG. 1 is a schematic diagram of a conventional energy storage device;

FIG. 2 is an assembly view of the present invention;

FIG. 3a is an exploded view of a first mobile variable-charge energy storage device according to the present invention;

FIG. 3b is an exploded view of a second mobile variable-charge energy storage device according to the present invention;

FIG. 4 is a main circuit diagram of the present invention;

fig. 5 is a system control diagram of the present invention.

Description of the main component symbols:

1 case body 1-1 case body rear plate 1-2 case body side plate

1-2-1 first box side plate ventilation opening 1-2-2 second box side plate ventilation opening 1-3 box front plate

1-3-1 box body front plate display screen sealing ring 1-3-2 box body front plate display screen protective film 1-3-3 box body front plate sealing ring

1-4 box upper plate 1-4-1 box upper plate seal ring 1-5 box bottom plate

1-6 in-box interface board fixing seat 1-6-1 in-box interface board fixing seat sealing ring 2 storage battery

2-1 accumulator socket 3 connector 3-1 connector plug

4 energy storage control panel 5 hasp assembly 5-1 hasp

5-2 hasp seat 5-3 hasp fixing screw 6 output interface board

7-pull rod 7-1 pull rod fixing screw 8-1 guide wheel

8-2 guide wheel fixing screw 9-1 handle 9-2 handle seat

9-3 handle fixing screw 10 switch and display screen 11 heat radiation fan

11-1 fixing screw for heat dissipation fan

Detailed Description

The utility model will be described in more detail below with reference to the accompanying drawings:

referring to fig. 5, the control circuit of the mobile variable electric quantity energy storage device includes a storage battery input terminal, a DC-DC module, a DC-AC module, an overvoltage and overcurrent protection module, a driving module, a controller, an AC filtering module, a current detection and processing module, an output voltage detection and processing module, a switch, and a display screen module; the DC-DC module and the overvoltage and overcurrent protection module are respectively supplied with power by a storage battery, the overvoltage and overcurrent protection module is connected into the controller, the overvoltage and overcurrent protection module is used for protecting an input and output circuit from overvoltage, overcurrent, short circuit and undervoltage, the DC-DC circuit is used for converting low-voltage direct current input by the storage battery into 400V medium-voltage direct current for the DC-AC module to use, the DC-AC circuit is used for converting the direct current into alternating current and is connected into the alternating current filtering module for filtering higher harmonics, the alternating current filtered by the alternating current filtering module is respectively connected to a load and is connected into the controller through the current detection and processing module, the controller drives and controls the DC-DC module through the driving module and the DC-AC module through the SPWM.

In this embodiment, the output voltage detection and processing module is connected in parallel with the switch and the display screen module, and the output voltage detection and processing module, the switch and the display screen module which are connected in parallel are driven by the sine wave reference signal.

In this embodiment, the controller is provided with a soft switch; and a switch and a display screen are arranged between the controller and the overvoltage and overcurrent protection module.

The mobile variable-electric-quantity energy storage device comprises an energy storage controller, a connector, a storage battery, an external interface board, a shell, (a pull rod, universal wheels and optional accessories), a switch and a display screen.

In the specific implementation process, the storage battery is installed on the rear side of the case, an output interface of the storage battery is connected to a direct current input end of the energy storage controller through a special connector, the energy storage controller is used for converting input direct current (with a voltage range of 32V-100V) in a certain range into alternating current (220V or 110V), the alternating current is supplied to other electric equipment such as outdoor electric appliances, electric tools, household emergency, a microgrid and the like through an output interface board, when the electric quantity of the storage battery is insufficient, the storage battery is not required to be placed at home for charging, and the storage battery can be moved to a nearby electric vehicle power change cabinet for quick replacement.

The interior of the box body is arranged into a front-back structure, and the storage battery is arranged at the rear part 2 of the box body and can be detached; in order to facilitate the replacement of the storage battery, the box cover is fixed on the box body through buckles (buckles 5-1 and 1 are the box body as shown in 5 in fig. 3), and 3S quick battery replacement can be realized; the energy storage controller is fixed on the front half part.

In the implementation process, the storage battery is a shared battery for various standardized electric vehicles on the market, such as 2 in fig. 3, and a corresponding connector 3 can be selected and matched for matching discharge output ports of different storage batteries.

As a further improved embodiment, the box body is provided with a handle 9 at the upper part, and a guide wheel 8 and a pull rod 7 can be optionally matched at the bottom.

The box body is further provided with a switch and an LCD display screen 10, information is communicated and interacted through a serial port, the switch is used for controlling the operation, the stop and the fault reset of the energy storage controller, and the display screen is used for displaying the operation state, the residual electric quantity, the voltage of the storage battery, the output power and the like.

As a further improved implementation scheme, the output port is a panel type socket board 6, the interface of the panel type socket board is provided with an alternating current output port and a USB charging interface, a user can conveniently connect various electric equipment, and in addition, socket boards with different interface numbers can be configured according to the user requirements.

As a further improved embodiment, in order to facilitate heat dissipation of power devices in the device, in this embodiment, a reasonable heat dissipation design is performed, that is, ventilation holes are formed opposite to two sides of the box body, and the fan 11 is designed at the bottom to form an air convection channel, so that the inside of the box body can be effectively and quickly cooled.

As a further improved embodiment, the outdoor waterproof and shock absorption functions are added, and the waterproof performance of the part link is realized through the sealing ring structures 1-6-3, 1-7-2 and 1-8-1 in the figure 3, so that the protection level of IP56 is reached.

The circuit connection is as shown in fig. 4, and mainly comprises four parts, namely a DC-DC circuit, a DC-AC circuit, a filter circuit, an auxiliary circuit and a protection circuit. The control block diagram of the system is shown in fig. 5, the DC-DC circuit realizes the function of converting low-voltage direct current input by a storage battery into medium-voltage direct current of 400V grade for the inverter circuit to use, the LLC resonant circuit is used, the isolated circuit reduces surge impact, the high-frequency transformer and the soft switching technology reduce the volume of the controller and the loss of the power device, the DC-AC circuit realizes the function of converting direct current into alternating current, the filter circuit is used for filtering out higher harmonics, the protection circuit performs overvoltage, overcurrent, short circuit, undervoltage protection and other protection on the input and output circuit, the auxiliary circuit is used for feeding back signals to the control circuit, and the system mainly comprises an input interface, a voltage starting circuit, an MOS switch tube, a PWM drive, a direct current conversion circuit, a feedback circuit, an LC oscillation and output circuit, a protection circuit and the like. The parallel machine control method is characterized in that a software phase-locked loop is adopted to carry out the same-frequency and same-phase control of the system, signals of Uref and Uf are shaped and sent to the MCU after being compared by an overvoltage comparator, the rising edges of the signals are captured by capture modules CAP1 and CAP2 of the MCU chip timer, the frequency and the phase difference of the signals are measured, whether the frequencies are the same or not is judged, if the frequencies are different, the switching frequency is recalculated, and the frequency is equal to fref. In the in-phase control algorithm, the delay time delta t of the MCU is judged by the MCU, and the pointer of the SPWM wavetable is adjusted to the corresponding position, so that the two signals are in phase. In the design, the SPWM carrier frequency is 25KHz, the SPWM interrupt interval is approximately 40us, the sine table is 500 points, and the electrical angle of each point corresponds to 2.88 degrees. The phase locking error does not exceed 0.5 percent, and the parallel operation control requirement of the system is completely met.

The above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims

1. A control circuit of a mobile variable electric quantity energy storage device is characterized by comprising a storage battery input end, a DC-DC module, a DC-AC module, an overvoltage and overcurrent protection module, a driving module, a controller, an alternating current filtering module, a current detection and processing module, an output voltage detection and processing module, a switch and a display screen module; the DC-DC modules are respectively supplied with power by a replaceable storage battery and comprise overvoltage and overcurrent protection modules; the overvoltage and overcurrent protection module is used for protecting an input and output circuit from overvoltage, overcurrent, short circuit and undervoltage, the DC-DC circuit converts low-voltage direct current input by the storage battery into 400V medium-voltage direct current for the DC-AC module to use, the DC-AC circuit converts the direct current into alternating current, the LC circuit connected with the output end in series is used for filtering out higher harmonics, the alternating current filtered by the alternating current filtering module is electrically connected with an electric load, output electric energy information is fed back to the controller through output voltage detection and current detection, the controller controls the boosting of the DC-DC module through PFM modulation, and the controller controls the DC-AC module to output pure sine wave alternating current through SPWM modulation.

2. The control circuit of claim 1, wherein the output voltage detection and processing module is connected in parallel with the switch and the display module, and the sine wave reference signal drives the parallel connection of the output voltage detection and processing module and the switch and the display module.