Battery replacing cabinet circuit and battery replacing cabinet

Abstract

The utility model relates to the field of batteries, and discloses a battery changing cabinet circuit and a battery changing cabinet. The battery changing cabinet circuit comprises a distributed power supply, a direct current bus connected with the distributed power supply and a plurality of charging circuits connected to the direct current bus, the first ends of the charging circuits are connected with the direct current bus, and the second ends of the charging circuits are used for being connected with rechargeable batteries; and the first device is arranged on each charging circuit, allows current to flow from the first end to the second end, and prevents the current from flowing from the second end to the first end. Compared with the prior art, the battery changing cabinet circuit and the battery changing cabinet provided by the embodiment of the utility model have the advantage of reducing the damage to the rechargeable battery.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and in particular to a battery exchange cabinet circuit and a battery exchange cabinet. Background Art

[0002] As a new generation of means of transportation, electric vehicles are becoming more and more popular because of their advantages such as energy saving, environmental protection, and easy portability, making the number of electric vehicles on the market increasingly large. Electric vehicles generally use batteries as power sources to provide energy for the drive motor. Once the battery is about to run out of power, it needs to be charged. However, even if the charging accessories are carried, it is not easy for users to find a suitable power socket to charge the battery in outdoor use scenarios. Therefore, battery swap cabinets that can provide users with fast and convenient battery replacement services have emerged. The battery swap cabinet is a device used to provide users with rechargeable batteries. It looks like a locker and has different battery compartments. Each battery compartment stores a power battery. The cabinet completes the battery rental by controlling the opening of the cabinet door. Each battery compartment is connected to a charger to automatically charge the battery. Electric vehicles can use the battery swap cabinet to achieve self-service battery replacement, so that electric vehicles no longer need to wait for a long time to charge.

[0003] Existing battery swap cabinets usually use commercial power supplies, which is costly. In order to solve this problem, related technologies have produced battery swap cabinets that use distributed energy such as solar energy and wind energy. However, these distributed energy sources are unstable and can easily damage the batteries being charged in them. Utility Model Content

[0004] The purpose of the utility model is to provide a battery exchange cabinet circuit and a battery exchange cabinet, which can reduce the damage to rechargeable batteries.

[0005] In the first aspect, an embodiment of the utility model provides a battery exchange cabinet circuit, including: a distributed power supply, a DC bus connected to the distributed power supply, and a plurality of charging circuits connected to the DC bus, wherein the first end of the charging circuit is connected to the DC bus, and the second end of the charging circuit is used to connect to a rechargeable battery; a first device is arranged on each of the charging circuits, and the first device allows current to flow from the first end to the second end, and prevents current from flowing from the second end to the first end.

[0006] Compared with the related art, in the battery swap cabinet circuit provided by the embodiment of the utility model, a first device is arranged in the charging circuit. When there are multiple rechargeable batteries in the battery swap cabinet for charging, since the first device only allows current to flow from the first end to the second end and prevents current from flowing from the second end to the first end, it can prevent the high-voltage rechargeable battery from discharging to the low-voltage rechargeable battery and generating a circulation current in the battery swap cabinet circuit. Once this circulation current is in the case of a large voltage difference, a large current will be generated, causing damage to the rechargeable battery and even causing safety risks such as fire. By setting the first device to prevent the generation of the circulation current, the damage to the rechargeable battery can be reduced. In addition, when the voltage of the distributed power supply is higher than that of the rechargeable battery, the first device only allows current to flow from the first end to the second end, so that the rechargeable battery can be charged normally. When the voltage of the distributed power supply fluctuates and is lower than that of the rechargeable battery, the first device prevents current from flowing from the second end to the first end, thereby preventing the rechargeable battery from discharging in reverse to the distributed power supply, thereby improving the charging efficiency of the rechargeable battery.

[0007] In an optional embodiment, the DC bus includes a DC bus positive pole and a DC bus negative pole, the charging circuit includes a positive charging circuit connected to the DC bus positive pole and a negative charging circuit connected to the DC bus negative pole; the first device is arranged on the positive charging circuit.

[0008] In an optional embodiment, the battery exchange cabinet circuit further includes: a mains input interface, and a plurality of mains charging units connected to the mains input interface, wherein the mains charging units are connected one-to-one with the charging circuit. By setting up a mains input interface, when the distributed power source cannot meet the charging demand of the rechargeable battery in the battery exchange cabinet, the mains power supply can be used to supplement the charging efficiency of the rechargeable battery; in addition, setting up a one-to-one connection between the mains charging units and the charging circuit can also reduce mutual interference between the rechargeable batteries, further reducing damage to the rechargeable batteries.

[0009] In an optional embodiment, the AC charging unit and the charging circuit are connected to a charging connection point in a one-to-one correspondence, and the first device is arranged between the first end and the charging connection point.

[0010] In an optional embodiment, the power exchange cabinet circuit further includes: a distributed power supply controller, the distributed power supply controller is arranged between the distributed power supply and the DC bus; the distributed power supply controller includes a communication device, the communication device is communicatively connected to the AC charging unit, and the communication device is used to upload the operating data of the distributed power supply controller to the cloud server via the AC charging unit. A communication device is arranged in the distributed power supply controller, and the communication device is communicatively connected to the AC charging unit. The communication device can upload the operating data of the distributed power supply controller to the cloud server via the AC charging unit, thereby eliminating the need to additionally arrange a remote network communication device in the distributed power supply controller, simplifying the power exchange cabinet circuit and reducing the cost of the power exchange cabinet.

[0011] In an optional embodiment, the communication device is also used to communicate with the rechargeable battery, and upload the operating data of the distributed power controller to the cloud server via the rechargeable battery. The communication device is connected to the rechargeable battery for communication, and the communication device can upload the operating data of the distributed power controller to the cloud server via the rechargeable battery, thereby eliminating the need to set up an additional remote network communication device in the distributed power controller, simplifying the circuit of the power exchange cabinet and reducing the cost of the power exchange cabinet.

[0012] In an optional embodiment, the power exchange cabinet circuit further includes: a second device, which is arranged between each of the distributed power sources and the DC bus, and the second device allows current to flow from the distributed power source to the DC bus, and prevents current from flowing from the DC bus to the distributed power source. The second device is arranged between each distributed power source and the DC bus to reduce the possibility of circulating current generated by multiple distributed power sources when the voltages are different, and further improve the safety of the power exchange cabinet circuit.

[0013] In an optional embodiment, the battery exchange cabinet circuit further includes: a series-parallel conversion device and a DC load port connected to the series-parallel conversion device; the series-parallel conversion device is connected to the charging circuit and is used to adjust the series / parallel connection of the rechargeable battery; an inverter and an AC load port connected to the inverter, and the inverter is connected to the series-parallel conversion device. Setting a DC load port can also have the function of discharging to other DC load devices; in addition, setting a series-parallel conversion device to adjust the series / parallel connection of the rechargeable battery can better control the discharge of rechargeable batteries of different voltages and further reduce the generation of circulating currents between different rechargeable batteries; in addition, setting an inverter can convert the DC power of the rechargeable battery into AC power, and setting an AC load port connected to the inverter can also have the function of discharging to other AC load devices.

[0014] In an optional embodiment, the first device is a diode.

[0015] In a second aspect, an embodiment of the utility model provides a battery exchange cabinet, comprising: a main body and a battery exchange cabinet circuit as described above, which is arranged in the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the circuit structure of the power exchange cabinet circuit provided in the first embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the circuit structure of the power exchange cabinet circuit provided in the second embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the circuit structure of the power exchange cabinet circuit provided in the third embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the circuit structure of the power exchange cabinet circuit provided in the fourth embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the circuit structure of the power exchange cabinet circuit provided in the fifth embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the circuit structure of the power exchange cabinet circuit provided in Example 6 of the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention but merely represents selected embodiments of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0027] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0028] The first embodiment of the utility model provides a power exchange cabinet circuit, such as Figure 1 As shown, it includes: a distributed power source 10, a DC bus 20, a plurality of charging circuits 30, and a first device 40. The distributed power source 10 may be, for example, a photovoltaic cell, a wind turbine, or other equipment. The distributed power source 10 is connected to the DC bus 20, and each charging circuit 30 is connected to the DC bus 20, respectively. The charging circuit 30 includes a first end 301 and a second end 302. The first end 301 is connected to the DC bus 20, and the second end 302 is used to connect to the rechargeable battery 100. The first device 40 is arranged on the charging circuit 30, and the first device 40 allows current to flow from the first end 301 to the second end 302, and prevents current from flowing from the second end 302 to the first end 301.

[0029] Compared with the related art, in the power exchange cabinet circuit provided in the first embodiment of the utility model, a first device 40 is arranged in the charging circuit 30. When there are multiple rechargeable batteries in the power exchange cabinet for charging, since the first device 40 only allows current to flow from the first end 301 to the second end 302 and prevents current from flowing from the second end 302 to the first end 301, it can prevent the high-voltage rechargeable battery from discharging to the low-voltage rechargeable battery and generate a circulating current in the power exchange cabinet circuit. Once the voltage difference is relatively large, this circulating current will generate a large current, causing damage to the rechargeable battery. In order to prevent the occurrence of safety risks such as injuries or even fire, the first device is set to prevent the generation of circulating current, thereby reducing the damage to the rechargeable battery; in addition, when the voltage of the distributed power supply is higher than that of the rechargeable battery, the first device 40 only allows current to flow from the first end 301 to the second end 302, so that the rechargeable battery can be charged normally. When the voltage of the distributed power supply 10 fluctuates and is lower than that of the rechargeable battery, the first device 40 prevents current from flowing from the second end 302 to the first end 301, thereby preventing the rechargeable battery from discharging in reverse to the distributed power supply 10, thereby improving the charging efficiency of the rechargeable battery.

[0030] Further, in some embodiments of the present invention, the first device 40 is a diode. It is understandable that the first device 40 being a diode is only an example of the first device 40 in some embodiments of the present invention, and does not constitute a limitation. In some other embodiments of the present invention, the first device 40 may also be other electronic components such as a field effect tube, a magnetoresistive resistor, a fast phase shifter, etc., and may be flexibly configured according to actual needs.

[0031] Further, such as Figure 1 As shown, in some embodiments of the present invention, the DC bus 20 includes a DC bus positive pole 201 and a DC bus negative pole 202, and the charging circuit 30 includes a positive charging circuit 303 connected to the DC bus positive pole 201 and a negative charging circuit 304 connected to the DC bus negative pole 202, wherein the first device 40 is arranged on the positive charging circuit 303.

[0032] It can be understood that the aforementioned first device 40 is provided on the positive charging circuit 303 for illustrative purposes only in some embodiments of the present invention, and does not constitute a limitation. In some other embodiments of the present invention, the first device 40 may be provided on the positive charging circuit 303 and the negative charging circuit 304, respectively. In addition, in different embodiments of the present invention, the number of first devices 40 provided on the positive charging circuit 303 and the negative charging circuit 304 may be one or more, and the specific number may be set according to actual needs.

[0033] The second embodiment of the utility model provides a power exchange cabinet circuit, such as Figure 2 As shown, it includes: a distributed power supply 10, a DC bus 20, a plurality of charging circuits 30, and a first device 40. In addition, in the power exchange cabinet circuit provided in the second embodiment of the utility model, it also includes a mains input interface 50 and a plurality of mains charging units 60 connected to the mains input interface 50. Among them, the number of the mains charging units 60 is equal to that of the charging circuits 30, and the mains charging units 60 are connected to the charging circuits 30 in a one-to-one correspondence.

[0034] Compared with the related art, the battery exchange cabinet circuit provided in the second embodiment of the utility model is additionally provided with a mains input interface 50 on the basis of retaining the circuit structure in the first embodiment. When the distributed power source 10 cannot meet the charging demand of the rechargeable battery in the battery exchange cabinet, the mains power supply can be connected through the mains input interface 50 for supplementation to ensure the charging efficiency of the rechargeable battery. In addition, the mains charging unit 60 is provided with a one-to-one connection with the charging circuit 30, which can also reduce the mutual interference between the rechargeable batteries and further reduce the damage to the rechargeable batteries.

[0035] Further, such as Figure 2 As shown, the AC charging unit 60 and the charging circuit 30 are connected to the charging connection point 601 in a one-to-one correspondence, and the first device 40 is arranged between the first end 301 and the charging connection point 601 .

[0036] The third embodiment of the utility model provides a power exchange cabinet circuit, such as Figure 3As shown, it includes: a distributed power supply 10, a DC bus 20, a plurality of charging circuits 30, and a first device 40. In addition, in the power exchange cabinet circuit provided in the third embodiment of the utility model, a distributed power supply controller 70 is also included. The distributed power supply controller 70 is arranged between the distributed power supply 10 and the DC bus 20. The distributed power supply controller 70 is used to perform input control on the distributed power supply 10, and control the magnitude of the output charging current flowing to the DC bus 20 through power devices such as MOS tubes. Among them, the distributed power supply controller 70 includes a communication device, which is communicatively connected to the AC charging unit 60, and the communication device is used to upload the operating data of the distributed power supply controller 70 to the cloud server via the AC charging unit 60.

[0037] In some embodiments of the present invention, the communication device may be, for example, a Bluetooth device, a CAN (Controller Area Network) communication device, etc., which may be flexibly selected according to actual needs.

[0038] Compared with the related art, in the battery swap cabinet circuit provided in Embodiment 3 of the utility model, a communication device is arranged in the distributed power supply controller 70, and the communication device is communicatively connected to the AC charging unit 60. The communication device can upload the operating data of the distributed power supply controller 70 to the cloud server via the AC charging unit, thereby eliminating the need to additionally arrange a remote network communication device in the distributed power supply controller 70, thereby simplifying the battery swap cabinet circuit and reducing the cost of the battery swap cabinet.

[0039] In some embodiments of the utility model, the communication device provided in the distributed power supply controller 70 can upload the operation data of the distributed power supply controller 70 to the cloud server via the mains charging unit 60, and can also upload other data to the cloud server via the mains charging unit 60, for example, the current size, direction and other data of the charging current of the rechargeable battery can be uploaded to the cloud server via the mains charging unit 60. Specifically, a current sensor can be provided at the second end 302 of the charging circuit 30, and the current size, direction and other data of the charging current of the rechargeable battery detected by the current sensor can be uploaded to the cloud server via the mains charging unit 60.

[0040] In some embodiments of the utility model, the communication device provided in the distributed power controller 70 can also be used to communicate with a rechargeable battery having a communication function, and upload the operating data of the distributed power controller 70 to the cloud server via the rechargeable battery. The communication device provided in the distributed power controller 70 is connected to the rechargeable battery for communication, and the communication device provided in the distributed power controller 70 can also upload the operating data of the distributed power controller 70 to the cloud server via the rechargeable battery, thereby eliminating the need to additionally provide a remote network communication device in the distributed power controller 70, simplifying the circuit of the power exchange cabinet and reducing the cost of the power exchange cabinet.

[0041] The fourth embodiment of the utility model provides a power exchange cabinet circuit, such as Figure 4 As shown, it includes: a distributed power source 10, a DC bus 20, a plurality of charging circuits 30, and a first device 40. In addition, in the power exchange cabinet circuit provided in the fourth embodiment of the utility model, it also includes a series-parallel conversion device 80 and a DC load port 90 connected to the series-parallel conversion device 80; the series-parallel conversion device 80 is connected to the charging circuit 30, and is used to adjust the series / parallel connection of the rechargeable battery.

[0042] Among them, when the battery exchange cabinet discharges to the outside through the DC load port 90, the series-parallel conversion device 80 can flexibly set the series and parallel relationship between each rechargeable battery according to the voltage of each rechargeable battery in the battery exchange cabinet.

[0043] Compared with the prior art, in the battery exchange cabinet circuit provided in the fourth embodiment of the utility model, a DC load port 90 is provided, which can also have the function of discharging to other DC load devices; in addition, a series-parallel conversion device 80 is provided to adjust the series / parallel connection of each rechargeable battery when the DC load port 90 discharges outward, which can better control the discharge of rechargeable batteries of different voltages and further reduce the generation of circulation between different rechargeable batteries.

[0044] Further, in some embodiments of the present invention, Figure 4 As shown, the series-parallel conversion device 80 can also be connected to the DC bus 20. Thus, the DC bus 20 can be used to directly discharge to the DC load, thereby reducing the discharge of the rechargeable battery and improving the charging efficiency of the rechargeable battery.

[0045] Further, in some other embodiments of the present invention, such as Figure 5As shown, the power exchange cabinet circuit may also include an inverter 110 and an AC load port 120 connected to the inverter 110. The inverter 110 is connected to the series-parallel conversion device 80. The inverter 110 can convert the DC power output by the rechargeable battery into AC power, and the AC load port 120 is connected to the inverter 110, which can also have the function of discharging other AC load devices.

[0046] Further, in some other embodiments of the present invention, such as Figure 6 As shown, when the power exchange cabinet circuit includes multiple distributed power sources 10, for example, a solar power generation power source and a wind power generation power source, the power exchange cabinet circuit may also include a second device 130, which is arranged between each of the distributed power sources 10 and the DC bus 20. The second device 130 allows current to flow from the distributed power source 10 to the DC bus 20, and prevents current from flowing from the DC bus 20 to the distributed power source 10. The second device is arranged between each distributed power source 10 and the DC bus 20 to reduce the possibility of circulating current between the multiple distributed power sources 10 when the voltages are different, and further improve the safety of the power exchange cabinet circuit.

[0047] In addition, in some other embodiments of the present application, the second device 130 can also be arranged between the AC power input interface 50 and the charging circuit 30, so as to reduce the possibility of circulating current between the AC power and the distributed power source 10 when the AC power is connected, and further improve the safety of the battery exchange cabinet circuit.

[0048] In some embodiments of the present application, the second device 130 can also be a diode. It is understandable that in different embodiments of the present application, the second device 130 and the first device 40 can be diodes of the same model or different models, which can be flexibly configured according to actual needs.

[0049] Embodiment 7 of the present utility model provides a battery exchange cabinet, comprising: a main body and a battery exchange cabinet circuit provided in the main body as provided in the above embodiments.

[0050] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A power exchange cabinet circuit, characterized in that: include: A distributed power source, a DC bus connected to the distributed power source, and a plurality of charging circuits connected to the DC bus, wherein a first end of the charging circuit is connected to the DC bus and a second end of the charging circuit is used to be connected to a rechargeable battery; A first device is provided on each of the charging circuits, wherein the first device allows current to flow from the first end to the second end and blocks current from the second end to the first end.

2. The power exchange cabinet circuit according to claim 1, characterized in that: The DC bus includes a DC bus positive pole and a DC bus negative pole, and the charging circuit includes a positive pole charging circuit connected to the DC bus positive pole and a negative pole charging circuit connected to the DC bus negative pole; The first device is arranged on the positive electrode charging circuit.

3. The power exchange cabinet circuit according to claim 1, characterized in that: The power exchange cabinet circuit also includes: A mains input interface, and a plurality of mains charging units connected to the mains input interface, wherein the mains charging units are connected to the charging circuits in a one-to-one correspondence.

4. The power exchange cabinet circuit according to claim 3, characterized in that: The AC charging unit and the charging circuit are connected to a charging connection point in a one-to-one correspondence, and the first device is arranged between the first end and the charging connection point.

5. The power exchange cabinet circuit according to claim 3, characterized in that: The power exchange cabinet circuit also includes: A distributed power supply controller, wherein the distributed power supply controller is arranged between the distributed power supply and the DC bus; The distributed power supply controller includes a communication device, which is communicatively connected to the AC charging unit, and is used to upload the operating data of the distributed power supply controller to a cloud server via the AC charging unit.

6. The power exchange cabinet circuit according to claim 5, characterized in that: The communication device is also used to communicate with the rechargeable battery and upload the operating data of the distributed power supply controller to the cloud server via the rechargeable battery.

7. The power exchange cabinet circuit according to claim 3, characterized in that: The power exchange cabinet circuit also includes: A second device is provided between each of the distributed power sources and the DC bus, and the second device allows current to flow from the distributed power sources to the DC bus, and prevents current from flowing from the DC bus to the distributed power sources.

8. The power exchange cabinet circuit according to claim 1, characterized in that: The power exchange cabinet circuit also includes: A series-parallel conversion device and a DC load port connected to the series-parallel conversion device; The series-parallel conversion device is connected to the charging circuit and is used to adjust the series / parallel connection of the rechargeable batteries; An inverter and an AC load port connected to the inverter, wherein the inverter is connected to the series-parallel conversion device.

9. The power exchange cabinet circuit according to any one of claims 1 to 8, characterized in that: The first device is a diode.

10. A power exchange cabinet, characterized in that: include: A main body and a battery exchange cabinet circuit arranged in the main body as described in any one of claims 1 to 9.

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