CN214707222U - Battery gradient utilization system and battery replacement cabinet - Google Patents
Battery gradient utilization system and battery replacement cabinet Download PDFInfo
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- CN214707222U CN214707222U CN202120614113.6U CN202120614113U CN214707222U CN 214707222 U CN214707222 U CN 214707222U CN 202120614113 U CN202120614113 U CN 202120614113U CN 214707222 U CN214707222 U CN 214707222U
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Abstract
A battery gradient utilization system and a battery changing cabinet comprise a plurality of battery packs, a plurality of bidirectional DC-DC conversion circuits and a control circuit, wherein the plurality of bidirectional DC-DC conversion circuits respectively connect the plurality of battery packs to a direct current bus, and the control circuit controls the on-off and voltage conversion directions of the plurality of bidirectional DC-DC conversion circuits according to the voltage of the bus so as to maintain the bus voltage of the direct current bus at a first preset voltage value, realize the coordination and matching of the battery packs with different voltages and the direct current bus, and maintain the bus voltage of the direct current bus at the first preset voltage value.
Description
Technical Field
The application belongs to the technical field of battery replacement control, and particularly relates to a battery gradient utilization system and a battery replacement cabinet.
Background
At present, a conventional battery replacement cabinet generally adopts a direct-current bus as main power supply and adopts a plurality of batteries with unified specifications as standby power supply, but the conventional battery replacement cabinet often cannot combine old and new battery packs with different voltages to the direct-current bus for stable power supply.
Therefore, the conventional battery replacement cabinet has the problem that new and old batteries with different voltages cannot be combined with a direct current bus to stably supply power.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a battery gradient utilizes system and trades electric cabinet, aims at solving and has the problem that can't combine the old and new battery that the voltage is different to the direct current bus and stabilize the power supply in traditional trading electric cabinet.
A first aspect of an embodiment of the present application provides a battery gradient utilization system, including:
a plurality of battery packs, wherein voltages of at least two of the battery packs are inconsistent;
the bidirectional DC-DC conversion circuits are used for respectively connecting the battery packs to a direct-current bus in a one-to-one correspondence manner, wherein each bidirectional DC-DC conversion circuit is used for controlling the direct-current bus to charge the battery packs and converting bus voltage of the direct-current bus into battery voltage of the battery packs, or is used for controlling the battery packs to discharge the direct-current bus and converting the battery voltage of the battery packs into the bus voltage of the direct-current bus; and
and the output ends of the control circuit are respectively connected with the bidirectional DC-DC conversion circuits in a one-to-one correspondence manner, and the control circuit is used for controlling the on-off and voltage conversion directions of the bidirectional DC-DC conversion circuits according to the bus voltage so as to maintain the bus voltage of the direct current bus at a first preset voltage value.
In one embodiment, the battery pack is hot-plugged into the bidirectional DC-DC conversion circuit.
In one embodiment, the bidirectional DC-DC conversion circuit includes:
the first half-bridge circuit is connected between the positive end and the negative end of the direct current bus, and the control end of the first half-bridge circuit is connected with the control circuit;
the second half-bridge circuit is connected between the positive end and the negative end of the battery pack, and the control end of the second half-bridge circuit is connected with the control circuit; and
a first inductor connected in series at a midpoint of the first half-bridge circuit and a midpoint of the second half-bridge circuit.
In one embodiment, the first half-bridge circuit includes a first switch tube, a second switch tube, a first diode, a second diode, and a first half-bridge driver, the first switch tube and the second switch tube are connected in series and then connected to the dc bus, the first diode and the first switch tube are connected in parallel, the second diode and the second switch tube are connected in parallel, an output end of the first half-bridge driver is connected to a control end of the first switch tube and a control end of the second switch tube, respectively, and an input end of the first half-bridge driver is connected to the control circuit.
In one embodiment, the control circuit includes:
the acquisition circuit is connected with the direct current bus and is used for acquiring the bus voltage of the direct current bus; and
the main control circuit is connected with the acquisition circuit and used for outputting a first driving signal to at least one bidirectional DC-DC conversion circuit when the bus voltage is greater than a first preset voltage value and outputting a second driving signal to at least one bidirectional DC-DC conversion circuit when the bus voltage is less than or equal to the first preset voltage value;
the bidirectional DC-DC conversion circuit is conducted under the driving of the first driving signal, and converts the bus voltage of the direct current bus into the battery voltage of the battery pack; the bidirectional DC-DC conversion circuit is conducted under the driving of the second driving signal, and converts the battery voltage of the battery pack into the bus voltage of the direct current bus.
In one embodiment, the control circuit further includes a first communication circuit, a plurality of branch terminals of the first communication circuit are respectively connected to the plurality of bidirectional DC-DC conversion circuits in a one-to-one correspondence, a common terminal of the first communication circuit is connected to the main control circuit, and the first communication circuit is configured to implement communication between the bidirectional DC-DC conversion circuit and the main control circuit.
In one embodiment, the control circuit further comprises: the isolation conversion circuit is connected between the direct current bus and the main control circuit in series, and is used for converting the bus voltage of the direct current bus into working voltage and transmitting the working voltage to the main control circuit in an isolation manner.
In one embodiment, the control circuit further comprises: and the key circuit is connected with the main control circuit and is used for controlling the main control circuit to be started or shut down.
A second aspect of the embodiments of the present application provides a trade electric cabinet, still includes:
a cabinet body; and
the battery gradient utilization system according to the first aspect of the embodiments of the present application, which is disposed in the cabinet body.
In one embodiment, the electricity changing cabinet further comprises: and the display screen is connected with the control circuit of the battery gradient utilization system and is used for displaying working parameters of the battery gradient utilization system.
The battery gradient utilization system comprises a plurality of battery packs, a plurality of bidirectional DC-DC conversion circuits and a control circuit, wherein the plurality of bidirectional DC-DC conversion circuits respectively connect the plurality of battery packs to the direct-current bus, and the control circuit controls the on-off and voltage conversion directions of the plurality of bidirectional DC-DC conversion circuits according to the bus voltage so as to maintain the bus voltage of the direct-current bus at a first preset voltage value, realize the coordination and cooperation of the battery packs with different voltages and the direct-current bus, and maintain the bus voltage of the direct-current bus at the first preset voltage value.
Drawings
FIG. 1 is a schematic circuit diagram of a battery gradient utilization system according to an embodiment of the present disclosure;
FIG. 2 is an exemplary circuit schematic of a bi-directional DC-DC conversion circuit in the battery gradient utilization system shown in FIG. 1;
FIG. 3 is an exemplary circuit schematic of the bi-directional DC-DC conversion circuit shown in FIG. 2;
FIG. 4 is an exemplary circuit schematic of a control circuit in the battery gradient utilization system shown in FIG. 1;
FIG. 5 is another example circuit schematic of the control circuit in the battery gradient utilization system shown in FIG. 4.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used 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 defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Fig. 1 shows a schematic circuit diagram of a battery gradient utilization system 20 provided in a first aspect of an embodiment of the present application, and for convenience of description, only the parts related to the embodiment are shown, and detailed as follows:
the battery gradient utilization system 20 in the present embodiment includes: the battery pack management system comprises a plurality of battery packs 100, a plurality of bidirectional DC-DC conversion circuits 200 and a control circuit 300, wherein the plurality of bidirectional DC-DC conversion circuits 200 respectively connect the plurality of battery packs 100 to a direct current bus 10 in a one-to-one correspondence manner, and a plurality of output ends of the control circuit 300 are respectively connected with the plurality of bidirectional DC-DC conversion circuits 200 in a one-to-one correspondence manner. The voltages of at least two battery packs 100 among the plurality of battery packs 100 are not uniform. Each bidirectional DC-DC conversion circuit 200 is used to control the DC bus 10 to charge the battery pack 100 and convert the bus voltage of the DC bus 10 into the battery voltage of the battery pack 100, or to control the battery pack 100 to discharge the DC bus 10 and convert the battery voltage of the battery pack 100 into the bus voltage of the DC bus 10. The control circuit 300 is configured to control the on/off and the voltage conversion direction of the plurality of bidirectional DC-DC conversion circuits 200 according to the magnitude of the bus voltage, so as to maintain the bus voltage of the DC bus 10 at a first preset voltage value.
It is understood that the plurality of battery packs 100 may include a plurality of old and new battery packs 100 with different types, different capacities, and different voltage levels, that is, the battery gradient utilization system 20 in this embodiment may implement mixed usage of the old and new battery packs 100, so as to improve utilization rate of the battery packs 100.
It is to be understood that the bidirectional DC-DC conversion circuit 200 may be constituted by a bidirectional DC-DC converter. For example, the bi-directional DC-DC conversion circuit 200 may employ a high-efficiency multi-phase buck-boost topology. The control circuit 300 may be formed of a microprocessor such as a single chip microcomputer.
It is understood that the first preset voltage value is a stable power supply value of the battery gradient utilization system 20 for supplying power to the outside, and the first preset voltage value can be adjusted according to actual needs.
The battery gradient utilization system 20 in the present embodiment includes a plurality of battery packs 100, a plurality of bidirectional DC-DC conversion circuits 200, and a control circuit 300, wherein, the plurality of bidirectional DC-DC converting circuits 200 respectively connect the plurality of battery packs 100 to the DC bus 10, the control circuit 300 controls the on-off and voltage converting directions of the plurality of bidirectional DC-DC converting circuits 200 according to the magnitude of the bus voltage, so as to maintain the bus voltage of the dc bus 10 at the first preset voltage value, and realize the coordination between the battery pack 100 with different voltages and the dc bus 10, so that the bus voltage of the dc bus 10 is maintained at the first preset voltage value, even the external power supply of the battery gradient utilization system 20 is adjustable and stable, the problem that the traditional battery changing cabinet cannot combine new and old batteries with different voltages to the direct current bus 10 to stably supply power is solved.
In one embodiment, the battery pack 100 is hot-plugged to the bidirectional DC-DC conversion circuit 200.
It is understood that the battery pack 100 and the bidirectional DC-DC conversion circuit 200 may be connected via an interface capable of supporting hot plug, such as a Universal Serial Bus (USB) interface, a 1394 interface, and the like.
In the battery gradient utilization system 20 of this embodiment, the battery pack 100 and the bidirectional DC-DC conversion circuit 200 are connected in a hot plug manner, so that the battery pack 100 can be arbitrarily plugged into or pulled out of the bidirectional DC-DC conversion circuit 200, and a plurality of battery packs 100 in the battery gradient utilization system 20 can be flexibly adjusted.
Referring to fig. 2, in one embodiment, the bidirectional DC-DC conversion circuit 200 includes: the battery pack comprises a first half-bridge circuit 210, a second half-bridge circuit 220 and a first inductor L1, wherein the first half-bridge circuit 210 is connected between the positive end and the negative end of the direct current bus 10, the second half-bridge circuit 220 is connected between the positive end and the negative end of the battery pack 100, the first inductor L1 is connected in series with the midpoint of the first half-bridge circuit 210 and the midpoint of the second half-bridge circuit 220, and the control end of the first half-bridge circuit 210 and the control end of the control circuit 300, which are connected with the control end of the second half-bridge circuit 220, are connected with the control circuit 300.
It is understood that the first half-bridge circuit 210 and the second half-bridge circuit 220 may be formed by bridge arm circuits formed by switching tubes. The control circuit 300 controls the voltage conversion direction and the voltage circulation direction of the bidirectional DC-DC conversion circuit 200 by controlling the conduction sequence of the first half-bridge circuit 210 and the second half-bridge circuit 220, so as to control the DC bus 10 to charge the battery pack 100 and convert the bus voltage of the DC bus 10 into the battery voltage of the battery pack 100, or to control the battery pack 100 to discharge the DC bus 10 and convert the battery voltage of the battery pack 100 into the bus voltage of the DC bus 10.
Referring to fig. 3, in an embodiment, the first half-bridge circuit 210 includes a first switch Q1, a second switch Q2, a first diode D1, a second diode D2, and a first half-bridge driver 211, the first switch Q1 and the second switch Q2 are connected in series and then connected to the dc bus 10, the first diode D1 is connected in parallel to the first switch Q1, the second diode D2 is connected in parallel to the second switch Q2, an output terminal of the first half-bridge driver 211 is connected to a control terminal of the first switch Q1 and a control terminal of the second switch Q2, respectively, and an input terminal of the first half-bridge driver 211 is connected to the control circuit 300.
Referring to fig. 3, in an embodiment, the second half-bridge circuit 220 includes a third switch Q3, a fourth switch Q4, a third diode D3, a fourth diode D4, and a second half-bridge driver 221, the third switch Q3 and the fourth switch Q4 are connected in series and then connected between the positive and negative electrodes of the battery pack 100, the third diode D3 and the third switch Q3 are connected in parallel, the fourth diode D4 and the fourth switch Q4 are connected in parallel, the output terminal of the second half-bridge driver 221 is connected to the control terminal of the third switch Q3 and the control terminal of the fourth switch Q4, respectively, and the input terminal of the second half-bridge driver 221 is connected to the control circuit 300.
It can be understood that, when the bus voltage of the dc bus 10 needs to be converted into the battery voltage of the battery pack 100, the third switching tube Q3 and the fourth switching tube Q4 are controlled to be alternately turned on after the first switching tube Q1 is controlled to be turned on. When the battery voltage of the battery pack 100 needs to be converted into the bus voltage of the dc bus 10, the first switching tube Q1 and the second switching tube Q2 are controlled to be alternately turned on after the third switching tube Q3 is controlled to be turned on.
Referring to fig. 3, in one embodiment, the bidirectional DC-DC conversion circuit 200 further includes a digital processor 230, and the digital processor 230 is configured to drive the first half-bridge driver 211 and the second half-bridge driver 221 according to a driving signal of the control circuit 300. Optionally, the digital processor 230 may also be integrated with the control circuit 300 into a control chip.
Referring to fig. 3, in an embodiment, the bidirectional DC-DC conversion circuit 200 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, wherein the first resistor R1 and the second resistor R2 are connected in series and then connected between the positive terminal and the negative terminal of the DC bus 10, and the third resistor R3 and the fourth resistor R4 are connected in series and then connected between the positive terminal and the negative terminal of the battery pack 100. The first resistor R1 and the second resistor R2 are used for collecting the bus voltage of the direct current bus 10 and outputting the bus voltage to the control circuit 300 or outputting the bus voltage to the control circuit 300 through the digital processor 230; the third resistor R3 and the fourth resistor R4 are used for collecting the battery voltage of the battery pack 100 and outputting the battery voltage to the control circuit 300 or outputting the battery voltage to the control circuit 300 through the digital processor 230.
Referring to fig. 4, in one embodiment, the control circuit 300 includes: the acquisition circuit 310 is connected with the main control circuit 320, a first end of the acquisition circuit 310 is connected with the direct current bus 10, a second end of the acquisition circuit 310 is connected with a first input end of the main control circuit 320, and an output end of the main control circuit 320 is connected with the plurality of bidirectional DC-DC conversion circuits 200 in a one-to-one correspondence manner. The acquisition circuit 310 is used for acquiring the bus voltage of the dc bus 10 by the acquisition circuit 310. The main control circuit 320 is configured to output a first driving signal to the at least one bidirectional DC-DC conversion circuit 200 when the bus voltage is greater than a first preset voltage value, and to output a second driving signal to the at least one bidirectional DC-DC conversion circuit 200 when the bus voltage is less than or equal to the first preset voltage value; the bidirectional DC-DC conversion circuit 200 is turned on by the driving of the first driving signal, and converts the bus voltage of the DC bus 10 into the battery voltage of the battery pack 100; the bidirectional DC-DC conversion circuit 200 is turned on by the second driving signal, and converts the battery voltage of the battery pack 100 into the bus voltage of the DC bus 10.
It is understood that the acquisition circuit 310 may be formed by a current sensor, a voltage sensor, or the like. The acquisition circuit 310 may further include an amplifying element such as a voltage operational amplifier device. The master control circuit 320 may be constituted by a microprocessor.
It can be understood that the main control circuit 320 can also determine whether the dc bus 10 is overvoltage, undervoltage, overcurrent, short-circuit, etc. by determining the collecting circuit 310, so as to implement corresponding overvoltage protection, undervoltage protection, overcurrent protection, short-circuit protection, etc
It can be understood that, the control circuit 300 in this embodiment, by using the collection circuit 310 and the main control circuit 320, realizes real-time collection of the bus voltage of the DC bus 10, so that the main control circuit 320 can compare the bus voltage with the first preset voltage value, even if the on-off and voltage conversion directions of the bidirectional DC-DC conversion circuits 200 are adjusted, the plurality of battery packs 100 can charge and discharge the DC bus 10 according to the requirements, and the DC bus 10 can be stably maintained at the first preset voltage value.
Referring to fig. 5, in an embodiment, the control circuit 300 further includes a first communication circuit 330, a plurality of branch terminals of the first communication circuit 330 are respectively connected to the plurality of bidirectional DC-DC conversion circuits 200 in a one-to-one correspondence manner, a common terminal of the first communication circuit 330 is connected to the main control circuit 320, and the first communication circuit 330 is configured to implement communication between the bidirectional DC-DC conversion circuits 200 and the main control circuit 320.
It is understood that the first communication circuit 330 may be formed by a Controller Area Network (CAN) communication module, such as a CAN communication module of type ISO 5010.
Optionally, in an embodiment, the battery management system further includes a plurality of second communication circuits, the plurality of second communication circuits are respectively connected to the plurality of battery packs 100 and the plurality of bidirectional DC-DC conversion circuits 200 in a one-to-one correspondence manner, the second communication circuits are configured to feed back battery information of the battery management system of the battery pack 100 to the bidirectional DC-DC conversion circuits 200, the bidirectional DC-DC conversion circuits 200 are fed back to the control circuit 300 through the first communication circuit 330, and the control circuit 300 performs charge and discharge management such as charge and discharge current limiting, voltage regulating, current equalizing and the like on the battery pack 100 according to the acquired battery information. The battery information includes an operation state, an electric quantity (a discharge amount and a charge amount), a temperature, and the like of the battery pack 100. The second communication circuit may be constituted by an RS485 module.
Referring to fig. 5, in one embodiment, the control circuit 300 further includes: the isolation conversion circuit 340 is connected between the dc bus 10 and the main control circuit 320 in series, and the isolation conversion circuit 340 is configured to convert a bus voltage of the dc bus 10 into a working voltage, and transmit the working voltage to the main control circuit 320 in an isolated manner.
It is understood that the isolation conversion circuit 340 may be formed by an isolation voltage conversion chip or a transformer, and is used for converting the bus circuit of the dc bus 10 into an operating voltage to supply power to the main control circuit 320.
Referring to fig. 5, in an embodiment, the control circuit 300 further includes a key circuit 350, the key circuit 350 is connected to the main control circuit 320, and the key circuit 350 is used for controlling the main control circuit 320 to power on or off.
It is understood that the key circuit 350 may be formed of a mechanical key, a capacitive key, or the like.
Optionally, in an embodiment, the control circuit 300 further includes a memory module for storing history data information, wherein the memory module may be formed by a memory such as a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like.
Optionally, in an embodiment, the control circuit 300 further includes a real-time clock module, the real-time clock module is connected to the main control circuit 320, and the real-time clock module is configured to provide a real-time clock signal for the main control circuit 320.
A second aspect of the embodiments of the present application provides a battery replacing cabinet, further including: a cabinet body; and a battery gradient utilization system 20 as described in the first aspect of the embodiments of the present application, the battery gradient utilization system 20 being disposed within the cabinet.
In one embodiment, the battery replacement cabinet further comprises: and the display screen is connected with the control circuit 300 of the battery gradient utilization system 20 and is used for displaying the working parameters of the battery gradient utilization system 20.
It is understood that the operating parameters of the battery gradient utilization system 20 include the operating state, the charge amount (discharge amount and charge amount), and the alarm information of each battery pack 100.
Optionally, the power conversion cabinet further includes a communication module, and the communication module is used for realizing communication between the power conversion cabinet and the external device.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A battery gradient utilization system, comprising:
a plurality of battery packs, wherein voltages of at least two of the battery packs are inconsistent;
the bidirectional DC-DC conversion circuits are used for respectively connecting the battery packs to a direct-current bus in a one-to-one correspondence manner, wherein each bidirectional DC-DC conversion circuit is used for controlling the direct-current bus to charge the battery packs and converting bus voltage of the direct-current bus into battery voltage of the battery packs, or is used for controlling the battery packs to discharge the direct-current bus and converting the battery voltage of the battery packs into the bus voltage of the direct-current bus; and
and the output ends of the control circuit are respectively connected with the bidirectional DC-DC conversion circuits in a one-to-one correspondence manner, and the control circuit is used for controlling the on-off and voltage conversion directions of the bidirectional DC-DC conversion circuits according to the bus voltage so as to maintain the bus voltage of the direct current bus at a first preset voltage value.
2. The battery gradient utilization system of claim 1, wherein the battery pack is hot-plugged into the bidirectional DC-DC conversion circuit.
3. The battery gradient utilization system of claim 1, wherein the bidirectional DC-DC conversion circuit comprises:
the first half-bridge circuit is connected between the positive end and the negative end of the direct current bus, and the control end of the first half-bridge circuit is connected with the control circuit;
the second half-bridge circuit is connected between the positive end and the negative end of the battery pack, and the control end of the second half-bridge circuit is connected with the control circuit; and
a first inductor connected in series at a midpoint of the first half-bridge circuit and a midpoint of the second half-bridge circuit.
4. The battery gradient utilization system of claim 3, wherein the first half-bridge circuit comprises a first switch tube, a second switch tube, a first diode, a second diode and a first half-bridge driver, the first switch tube and the second switch tube are connected in series and then connected to the DC bus, the first diode and the first switch tube are connected in parallel, the second diode and the second switch tube are connected in parallel, an output end of the first half-bridge driver is respectively connected to a control end of the first switch tube and a control end of the second switch tube, and an input end of the first half-bridge driver is connected to the control circuit.
5. The battery gradient utilization system of any of claims 1-4, wherein the control circuit comprises:
the acquisition circuit is connected with the direct current bus and is used for acquiring the bus voltage of the direct current bus; and
the main control circuit is connected with the acquisition circuit and used for outputting a first driving signal to at least one bidirectional DC-DC conversion circuit when the bus voltage is greater than a first preset voltage value and outputting a second driving signal to at least one bidirectional DC-DC conversion circuit when the bus voltage is less than or equal to the first preset voltage value;
the bidirectional DC-DC conversion circuit is conducted under the driving of the first driving signal, and converts the bus voltage of the direct current bus into the battery voltage of the battery pack; the bidirectional DC-DC conversion circuit is conducted under the driving of the second driving signal, and converts the battery voltage of the battery pack into the bus voltage of the direct current bus.
6. The battery gradient utilization system of claim 5, wherein the control circuit further comprises a first communication circuit, wherein the plurality of branch terminals of the first communication circuit are respectively connected with the plurality of bidirectional DC-DC conversion circuits in a one-to-one correspondence, a common terminal of the first communication circuit is connected with the master control circuit, and the first communication circuit is configured to enable communication between the bidirectional DC-DC conversion circuit and the master control circuit.
7. The battery gradient utilization system of claim 5, wherein the control circuit further comprises:
the isolation conversion circuit is connected between the direct current bus and the main control circuit in series, and is used for converting the bus voltage of the direct current bus into working voltage and transmitting the working voltage to the main control circuit in an isolation manner.
8. The battery gradient utilization system of claim 5, wherein the control circuit further comprises:
and the key circuit is connected with the main control circuit and is used for controlling the main control circuit to be started or shut down.
9. The utility model provides a trade battery case which characterized in that still includes:
a cabinet body; and
the battery gradient utilization system according to any one of claims 1 to 8, disposed within the cabinet body.
10. The battery changing cabinet as recited in claim 9, further comprising:
and the display screen is connected with the control circuit of the battery gradient utilization system and is used for displaying working parameters of the battery gradient utilization system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120614113.6U CN214707222U (en) | 2021-03-25 | 2021-03-25 | Battery gradient utilization system and battery replacement cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120614113.6U CN214707222U (en) | 2021-03-25 | 2021-03-25 | Battery gradient utilization system and battery replacement cabinet |
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| CN214707222U true CN214707222U (en) | 2021-11-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663979A (en) * | 2022-12-13 | 2023-01-31 | 麦田能源有限公司 | Voltage balancing method of battery pack, battery energy storage and power supply system and electronic device |
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2021
- 2021-03-25 CN CN202120614113.6U patent/CN214707222U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663979A (en) * | 2022-12-13 | 2023-01-31 | 麦田能源有限公司 | Voltage balancing method of battery pack, battery energy storage and power supply system and electronic device |
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