CN117203088A

CN117203088A - Electricity exchanging system

Info

Publication number: CN117203088A
Application number: CN202280029976.4A
Authority: CN
Inventors: 李永超; 谢吉海; 武大鹏; 周康; 叶炜
Original assignee: Contemporary Amperex Energy Service Technology Ltd
Current assignee: Contemporary Amperex Energy Service Technology Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-12-08
Also published as: WO2023206493A1

Abstract

The embodiment of the application provides a power conversion system. The power conversion system comprises: the first battery management equipment is arranged in the power utilization device; the second battery management equipment is arranged in the battery in the power utilization device; the third battery management device is arranged in a management device in the power exchange station and is used for controlling the power utilization device to exchange batteries in the power exchange station; the first battery management device is connected with the second battery management device in a wireless mode, and the first battery management device is connected with the third battery management device in a wireless mode. The power conversion system provided by the embodiment of the application can improve the communication reliability under the field conversion scene.

Description

Electricity exchanging system

Technical Field

The application relates to the technical field of batteries, in particular to a power conversion system.

Background

With the development of new energy technology, a power conversion technology is one of the development modes of battery technology, in which a battery of an electric device driven into a power conversion station can be removed and the battery can be taken out from the power conversion station to be replaced with the electric device.

At present, since the battery needs to be circulated between the power exchange station and different power utilization devices, a scheme capable of improving the communication reliability under the power exchange field is needed.

Disclosure of Invention

The embodiment of the application provides a power conversion system which can improve the communication reliability under the field of power conversion.

In a first aspect, a power conversion system is provided, including: the first battery management equipment is arranged in the power utilization device; the second battery management equipment is arranged in the battery in the power utilization device; the third battery management device is arranged in a management device in the power exchange station and is used for controlling the power utilization device to exchange batteries in the power exchange station; the first battery management device is connected with the second battery management device in a wireless mode, and the first battery management device is connected with the third battery management device in a wireless mode.

In this embodiment, the first battery management device on the power utilization device is wirelessly connected with the second battery management device in the battery and the third battery management device in the power exchange station respectively, so that the communication problem caused by the damage of the connector or the wire harness can not occur, and the communication reliability under the power exchange field is improved.

In one possible implementation, the power conversion system further includes: the fourth battery management device is arranged in a battery changing cabinet in the battery changing station, and the battery changing cabinet is used for charging the battery detached from the power utilization device; the fourth battery management device is wirelessly connected with the second battery management device.

In the embodiment, the fourth battery management device is arranged in the battery changing cabinet, and the second battery management device is in wireless connection with the second battery management device, so that a control module is not needed in each charging bin in the battery changing cabinet, and therefore wiring harnesses and the control module can be saved, and cost is reduced.

In one possible implementation, the power conversion system further includes: a diagnostic device for performing a fault diagnosis of at least one of the electricity consumption device, the management device, and the battery; the diagnostic device is wirelessly connected with the first battery management apparatus, the third battery management apparatus, and the second battery management apparatus, respectively.

In this embodiment, by wirelessly connecting the diagnostic device with the first battery management apparatus, the second battery management apparatus, the third battery management apparatus, and the fourth battery management apparatus at the same time, fault localization can be quickly completed so as to remove the fault in time.

In one possible implementation, the third battery management device is configured to initiate a wireless connection request to the first battery management device before the powered device reaches the power exchange station and performs the power exchange.

In one possible implementation, the first battery management device is configured to initiate a wireless connection request to the second battery management device after the battery is installed in the powered apparatus and without establishing a connection with the second battery management device.

In this embodiment, by the first battery management device initiating a wireless connection request to the second battery management device and the third battery management device initiating a wireless connection request to the first battery management device, wireless connection between the first battery management device and the second battery management device and wireless connection between the third battery management device and the first battery management device can be achieved, so that a communication problem caused by damage to the connector or the wire harness can be avoided.

In one possible implementation, the second battery management device is configured to send the status information of the battery to the first battery management device after establishing the wireless connection with the first battery management device.

In this embodiment, the second battery management device may send the state information of the battery to the first battery management device through a wireless connection to achieve accurate control of the battery.

In one possible implementation, the first battery management device is configured to send at least one of settlement information, power information, verification information, vehicle body posture information, and status information of the battery of the electric device to the third battery management device after establishing the wireless connection with the third battery management device.

In this embodiment, the first battery management device may send various information to the third battery management device via a wireless connection, facilitating the third battery management device to control various devices within the power exchange station to effect a power exchange at the power exchange station.

In one possible implementation, the third battery management device is configured to determine whether to replace the battery at the battery exchange station in response to the status information of the battery.

In this embodiment, before the power is replaced, the third battery management apparatus determines whether to replace the battery at the power replacing station according to the state information of the battery on the power using device, which is beneficial to avoiding the situation that the battery is detached from the power using device and returned, and thus is beneficial to improving the power replacing efficiency.

In one possible implementation, the state information of the battery includes parameter information of the battery, the parameter information including at least one of an amount of electricity, a voltage, and a temperature; the third battery management device is used for responding to the parameter information of the battery, determining the fault information of the battery, and determining whether to replace the battery at the power exchange station according to the fault information of the battery.

In this embodiment, the failure information of the battery is determined by the third battery management device, not the first battery management device. The third battery management device does not need to read the fault information acquired by the first battery management device, so that the signaling overhead is reduced.

In one possible implementation, the status information of the battery includes failure information of the battery, and the third battery management device determines whether to replace the battery at the battery replacement station in response to the failure information of the battery.

In this embodiment, the fault information is used to explicitly indicate the fault of the battery, so that the third battery management device can directly use the fault information to determine whether to replace the battery, and therefore, the complexity of the logic judgment of the third battery management device is reduced.

In one possible implementation, the third battery management device is configured to control the output device in the power exchange station to output power exchange information, where the power exchange station is determined not to exchange the battery, and the power exchange information includes information indicating that power exchange is not allowed to the user.

In this embodiment, the third battery management device outputs the information that the power change is not allowed to the user through the output device of the power change station, so that the user can timely know that the power utilization device has the fault that the power change is not allowed, and further can drive away from the power change station as soon as possible, so that the power utilization device needing the power change at the back is not affected.

In one possible implementation manner, the verification information includes identification information of the electric device and identification information of the battery, and the third battery management apparatus is configured to query the identification information of the battery corresponding to the identification information of the electric device, and determine whether the queried identification information of the battery is consistent with the identification information of the battery in the verification information.

In this embodiment, the third battery management device may verify the identification information of the battery in response to the verification information, so that the occurrence of a situation that the power consumption device is inconsistent with the battery may be avoided, and when abnormal behaviors such as battery replacement or battery replacement by mistake occur, the third battery management device may refuse to replace the battery, thereby improving the reliability of the power conversion process.

In one possible implementation, the identification information of the battery is a media access control (Media Access Control, MAC) address.

In one possible implementation, the third battery management device is wirelessly connected with the fourth battery management device.

In this embodiment, the fourth battery management device can save the wire harness between the third battery management device and the fourth battery management device by wireless connection with the third battery management device, so that the cost can be saved.

In one possible implementation, the third battery management device is configured to determine charging information according to the state information of the battery, and the fourth battery management device is configured to control the battery to be charged in response to the charging information.

In this embodiment, by the communication between the first battery management device and the second battery management device, the communication between the first battery management device and the third battery management device, the communication between the fourth battery management device and the second battery management device, and the communication between the third battery management device and the fourth battery management device, the charge management process of the battery in the battery exchange station can be realized without manual participation, the charge management process can be automatically performed, and the efficiency of the charge management is improved.

In one possible implementation, the diagnostic means is configured to send a fault clearing instruction to the first battery management device in response to the fault information of the battery sent by the first battery management device after the wireless connection is established with the first battery management device.

In this embodiment, the diagnostic device transmits a fault clearing instruction to the first battery management apparatus, so that the fault currently existing in the first battery can be cleared quickly.

In one possible implementation, the wireless connection is a bluetooth communication.

In this embodiment, bluetooth communication is employed, power consumption is low, and delay is low in a short distance.

In one possible implementation, the third battery management device is wirelessly connected with the second battery management device.

In one possible implementation, the battery management device is a battery management unit BMU.

Drawings

Fig. 1 shows a schematic diagram of an application scenario of a power conversion system provided by an embodiment of the present application.

Fig. 2 shows a schematic block diagram of a power conversion system according to an embodiment of the present application.

Fig. 3 shows another schematic block diagram of the power conversion system provided by the embodiment of the application.

Fig. 4 shows a further schematic block diagram of a power conversion system according to an embodiment of the application.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

With the development of new energy technology, the application field of the battery is more and more wide, such as providing power for the electric device or supplying power for the electric device. For example, the battery can be used as a power source to provide power for the vehicle, and under the condition that the electric quantity of the battery in the vehicle is insufficient to support the vehicle to continue running, the charging equipment such as a charging pile can be used for charging the vehicle, namely, the battery in the vehicle is charged, so that the battery can be circularly used for charging and discharging. However, the battery charging takes a long time, which limits the cruising use of the vehicle.

In order to improve the endurance utilization rate of the vehicle, a power conversion technology is generated. The battery replacement technology adopts a mode of 'vehicle-electricity separation', and can provide battery replacement service for the vehicle through a battery replacement station, namely, the battery can be quickly taken down or installed from the vehicle. The battery taken down from the vehicle can be put into a battery-changing cabinet of the battery-changing station for charging so as to be ready for battery-changing for the vehicle entering the battery-changing station subsequently.

In the current power exchange scenario, a controller area network (Controller Area Network, CAN) is used for communication among vehicles, batteries and power exchange stations, which is a wired communication mode, and a physical wire harness and a connector are required for data transmission. Because the vehicle is high in power conversion frequency, power conversion is required to be carried out through the pulling and inserting of the vehicle connector each time, the connector is a loss piece, and communication abnormality can be caused by the damage of the connector or a wire harness after power conversion for many times, so that the communication reliability under the power conversion field is affected.

In view of this, the embodiment of the application provides a power conversion system, in which a battery management device on a power utilization device is respectively connected with a battery management device in a battery and a battery management device in a power conversion station in a wireless manner, so that the communication problem caused by the damage of a connector or a wire harness is avoided, and the communication reliability under the power conversion field is improved.

It should be noted that, the battery management device in the embodiment of the present application may be a battery management unit (Battery Management Unit, BMU) as understood by those skilled in the art, or may be a general controller capable of implementing wireless communication. For example, in a Cell To Chassis (CTC) scenario, that is, where a battery is placed in a chassis, the battery management device may be a controller on the electric device, which may implement the function of a battery management unit in the battery, or may implement the function of a battery management unit on the electric device, or may implement the function of an existing vehicle controller (Vehicle control unit, VCU), which is not limited by those skilled in the art.

Fig. 1 shows a schematic diagram of an application scenario of a power conversion system according to an embodiment of the present application. Taking an electric device as a vehicle, as shown in fig. 1, an application scenario of the electric power conversion system may relate to a power conversion station 11, a vehicle 12 and a battery.

The power exchange station 11 may refer to a location that provides power exchange services for a vehicle. For example, the power exchange station 11 may be a stationary location, or the power exchange station 11 may be a movable location such as a mobile power exchange vehicle, without limitation.

The vehicle 12 may be removably connected with a battery. In some examples, the vehicle 12 may be a car, van, or the like, powered by a power battery.

The batteries may include a battery disposed within the vehicle 12 and a battery located in the power exchange station 11 for exchanging power. For ease of distinction, as shown in fig. 1, the battery to be replaced in the vehicle 12 is denoted as battery 141, and the battery for battery replacement in the battery replacement station is denoted as battery 142. The battery may be a lithium ion battery, a lithium metal battery, a lead-acid battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, a sodium ion battery, or the like, and is not limited thereto. The battery may be a battery cell, a battery module, or a battery pack on a scale, which is not limited herein. The battery may, in addition to being a power source for powering the motor of the vehicle 12, also power other electrical devices in the vehicle 12, such as an in-vehicle air conditioner, an in-vehicle player, etc.

After the vehicle 12 with the battery 141 mounted thereon is driven into the battery exchange station 11, the battery 141 is removed from the vehicle 12 by the battery exchange device by the battery exchange station 11, and the battery 142 is taken out of the battery exchange station 11, and then the battery 142 is mounted on the vehicle 12. The vehicle 12 with the battery 142 mounted thereon may then be driven off the battery exchange station 11. Through the power conversion technology, the vehicle can be rapidly supplemented with energy in a few minutes or even tens of seconds, and the user experience is improved.

As shown in fig. 1, the vehicle 12 may be correspondingly provided with a first battery management unit 121, where the first battery management unit 121 is used to manage a plurality of batteries 141 installed on the vehicle, for example, control the batteries 141 to provide electric energy to an electric device or control a charging device to charge the batteries 141, and the first battery management unit 121 may be referred to as a main battery management unit (Master Battery Management Unit, MBMU). The battery (including the battery 141 or the battery 142) is correspondingly provided with a second battery management unit 143, the second battery management unit 143 being for managing the corresponding battery, for example, the closing or opening of a relay within the corresponding battery may be controlled to control the corresponding battery to be connectable with a high voltage system on the vehicle 12, the second battery management unit 143 may be referred to as a slave battery management unit (Slave Battery Management Unit, SBMU). The power exchange station 11 may be provided with management means, respectively. The management device may be a centralized structure or a distributed structure, and is not limited thereto. The management device may be provided inside the power exchange station 11 or may be provided outside the power exchange station 11. In the case of a distributed structure of the management device, the management device may also be arranged partly inside the station 11 and partly outside the station 11. For example, as shown in fig. 1, the management device may include a station control system 151 inside the power exchange station 11 and a cloud server 152 outside the power exchange station 11, which is not limited herein. The management device is used to control the vehicle 12 to replace the battery in the battery replacement station 11. The station control system 151 may also be correspondingly provided with a third battery management unit 153, which third battery management unit 153 may interact with the first battery management unit 121 on the vehicle 12 to effect a power change within the power exchange station 11.

As shown in fig. 1, a power exchange cabinet 13 may be provided in the power exchange station 11. The battery cabinet 13 includes a fourth battery management unit 131 and a charging unit 132. The battery changing cabinet 13 may be further provided with a plurality of charging bins 133, and batteries for changing the power may be placed in the charging bins 133 of the battery changing cabinet 13 of the battery changing station 11. The fourth battery management unit 131 may be used to control the charging unit 132 to charge the battery in the charging bin 133. The fourth battery management unit 131 may be referred to as a central battery management unit (Charger Battery Management Unit, CBMU). In some examples, the charging unit 132 may include components, devices, or apparatuses having a charging function, such as an AC/DC module, i.e., an AC/DC module, without limitation. The charging units 132 may be disposed in one-to-one correspondence with the charging bins 133, or one charging unit 132 may be shared by a plurality of charging bins 133, which is not limited herein.

In some embodiments, the second battery management unit 143 may be implemented using a battery management system (Battery Management System, BMS) of the corresponding battery; the first battery management unit 121 may be implemented by a control module of a battery breaking unit (Battery Disconnect Unit, BDU) or may be implemented by a BMS of one of the batteries.

Alternatively, the first battery management unit 121 may communicate with the second battery management unit 143, the third battery management unit 153 may communicate with the first battery management unit 121, and the fourth battery management unit 131 may also communicate with the second battery management unit 143.

Fig. 2 shows a schematic block diagram of a power conversion system 200 according to an embodiment of the application. As shown in fig. 2, the power conversion system 200 includes: a first battery management device 210 disposed within the powered apparatus; a second battery management device 220 disposed within the battery in the power utilization apparatus; the third battery management device 230 is arranged in a management means in the power exchange station for controlling the power utilization means to exchange the battery in the power exchange station. Wherein the first battery management device 210 is wirelessly connected with the second battery management device 220, and the first battery management device 210 is wirelessly connected with the third battery management device 230.

Alternatively, the powered device may be a vehicle, and in the future may be as small as a robot, as large as a ship and aircraft, etc. powered or supplied with power by a battery. The embodiment of the application does not limit the electric device.

Alternatively, the first battery management device 210 may be the first battery management unit 121 shown in fig. 1, the second battery management device 220 may be the second battery management unit 143 shown in fig. 1, and the third battery management device 230 may be the third battery management unit 153 shown in fig. 1.

Therefore, in the power conversion system 200 provided in the embodiment of the present application, the first battery management device 210 on the power utilization device is respectively connected with the second battery management device 220 in the battery and the third battery management device 230 in the management device in the power conversion station in a wireless manner, so that the communication problem caused by the damage of the connector or the wire harness is not generated, and the communication reliability under the power conversion field is improved.

For example, after a wireless connection is established between the first battery management device 210 and the second battery management device 220, the second battery management device 220 may transmit state information of the battery to the first battery management device 210 through the wireless connection. Such as parameter information of the battery, fault information, relay closed state of the battery, etc. When the powered device reaches the power exchange station, the third battery management apparatus 230 may establish a wireless connection with the first battery management apparatus 210, and the first battery management apparatus 210 may send status information of the battery on the powered device to the third battery management apparatus 230 through the wireless connection so that the second battery management apparatus 230 performs fault detection on the battery on the powered device.

It should be noted that, when the first battery management device 210 is wirelessly connected to the second battery management device 220 and the third battery management device 230, one between every two battery management units may be a master, and the other may be a slave. And the power conversion system 200 can support a master multi-slave mode. For example, the first battery management device 210 may be wirelessly connected simultaneously with the plurality of second battery management devices 220. As another example, the third battery management device 230 may be wirelessly connected simultaneously with the plurality of first battery management devices 210.

Fig. 3 shows another schematic block diagram of a power conversion system 200 according to an embodiment of the application. As shown in fig. 3, the power conversion system 200 may further include a fourth battery management device 240 disposed in a power conversion cabinet in the power conversion station, where the power conversion cabinet is used for charging the battery detached from the power utilization device; the fourth battery management device 240 is wirelessly connected with the second battery management device.

Alternatively, the fourth battery management device 240 may be the fourth battery management unit 131 described in fig. 1.

Specifically, when the powered device reaches the power exchange station, the first battery management apparatus 210 may disconnect the wireless connection with the second battery management apparatus 220 before performing the power exchange. And the third battery management device 230 may interact with the first battery management device to determine whether to replace a battery within the battery exchange station. When the battery provided with the second battery management device 220 is detached from the power utilization apparatus and put into the charging cabinet in the power exchange station for charging, the fourth battery management device 240 may be wirelessly connected with the second battery management device 220, for example, battery in-and-out bin monitoring, real-time monitoring of battery status, battery fault detection and charging control may be performed.

In this embodiment, the fourth battery management device 240 is disposed in the battery-changing cabinet, and the second battery management device 220 is wirelessly connected with the fourth battery management device 240, so that a control module is not needed in each charging bin in the battery-changing cabinet, thereby saving the wire harness and the control module and reducing the cost.

Fig. 4 shows another schematic block diagram of a power conversion system 200 provided by an embodiment of the present application. As shown in fig. 4, the power conversion system 200 further includes: and the diagnostic device 250 is used for performing fault diagnosis on at least one of the power utilization device, the management device, the battery and the battery changing cabinet. The diagnostic device is wirelessly connected with the first battery management apparatus 210, the second battery management apparatus 220, the third battery management apparatus 230, and the fourth battery management apparatus 240, respectively.

Specifically, after any one of the power consumption device, the management device, the battery, and the battery change cabinet is abnormal, the diagnosis device 250 may be used for fault diagnosis. For example, the diagnostic device 250 may establish a wireless connection with the second battery management apparatus 220, and acquire state information inside the battery, such as fault information of the battery or parameter information of the battery, through the wireless connection, thereby implementing fault diagnosis of the battery. For another example, the diagnostic device 250 may establish a wireless connection with the first battery management apparatus 210, and determine whether the battery is malfunctioning or a power management controller, high voltage box, or other component on the powered device is malfunctioning from the data sent by the first battery management apparatus 210. For another example, the diagnostic device 250 may establish a wireless connection with the third battery management apparatus 230 to determine whether the management device or a device controlled by the management device, such as a power conversion device, has failed. For another example, the diagnostic device 250 may also establish a wireless connection with the fourth battery management apparatus 240 to determine which component in the battery exchange cabinet has failed.

After the diagnosis device 250 performs fault diagnosis on any one of the electricity utilization device, the management device, the battery and the battery changing cabinet, the diagnosis device can prompt a maintenance person in time so as to remove faults in time.

In this embodiment, by wirelessly connecting the diagnostic device 250 with the first battery management apparatus 210, the second battery management apparatus 220, the third battery management apparatus 230, and the fourth battery management apparatus 240 at the same time, fault localization can be quickly accomplished so as to remove faults in time.

Optionally, in an embodiment of the present application, the third battery management device 230 is configured to initiate a wireless connection request to the first battery management device 210 before the powered device reaches the power exchange station and performs power exchange.

Alternatively, in an embodiment of the present application, the first battery management device 210 is configured to initiate a wireless connection request to the second battery management device 220 after the battery is installed in the powered apparatus and without establishing a connection with the second battery management device 220.

In the above description, any two battery management units in the power conversion system 200 provided in the embodiment of the present application are connected wirelessly, one as a master and one as a slave. Specifically, for wireless connection between the first battery management device 210 and the second battery management device 220, the first battery management device 210 may act as a master and the second battery management device 220 may act as a slave. That is, the first battery management device 210 controls the timing of establishing or disconnecting wireless communication with the second battery management device 220, and the third battery management device 230 controls the timing of establishing or disconnecting wireless communication with the first battery management device 210. For example, during a power change, before a battery on a powered device is removed, the first battery management device 210 may actively initiate a wireless connection with a second battery management device 220 on the battery, and after a battery in the power change station is installed on the powered device, the first battery management device 210 may actively initiate a wireless connection with the second battery management device 220 on the newly installed battery. For another example, the third battery management device 230 may actively initiate a wireless connection with the first battery management device 210 on the powered apparatus when the powered apparatus reaches the power exchange station, and the third battery management device 230 may actively initiate a wireless disconnection with the first battery management device 210 on the powered apparatus after the power exchange is completed.

In one example, when the electric device arrives at the power exchange station, the third battery management apparatus 230 may acquire identification information of the electric device, for example, scan license plate information of the vehicle through a camera in the power exchange station, and the second battery management apparatus 220 may search for identification information of a battery matching the identification information of the electric device at the cloud according to the identification information of the electric device, and further the third battery management apparatus 230 may initiate a wireless connection request to the first battery management apparatus 210 in response to the searched identification information of the battery.

Alternatively, the identification information of the battery may be a network address of the battery. For example, if the wireless connection in the embodiment of the present application is a bluetooth connection, the network address is a MAC address. For another example, if the wireless connection in the embodiment of the present application is wifi connection, the network address is an IP address.

In this embodiment, by the first battery management device 210 initiating a wireless connection request to the second battery management device 220 and the third battery management device 230 initiating a wireless connection request to the first battery management device 210, wireless connection of the first battery management device 210 and the second battery management device 220 and wireless connection of the third battery management device 230 and the first battery management device 210 can be achieved, so that communication problems caused by connector or harness damage can be avoided.

Alternatively, in the embodiment of the present application, the second battery management device 220 is configured to send the state information of the battery to the first battery management device 210 after the wireless connection is established with the first battery management device 210.

Specifically, the second battery management device 220 may transmit parameter information such as voltage, temperature, and power of the battery, fault information of the battery, and a closed state of the relay to the first battery management device 210. The first battery management device 210 may then perform corresponding control according to the information sent by the second battery management device 220, and transmit a corresponding control instruction to the second battery management device 220, so that the second battery management device 220 executes the control instruction. For example, when the first battery management device 210 determines that the amount of power of the battery is below a certain threshold, a charge command may be sent to the second battery management device 220, and the second battery management device 220 may perform a corresponding action in response to the charge command to implement a high voltage system connection with the power consuming device. For another example, when the battery needs to be charged, the battery needs to be heated first because the low ambient temperature has a certain influence on the charging of the battery. When the first battery management device 210 determines that the temperature of the battery has become higher than a certain threshold, a stop heating request may be transmitted to the second battery management device 220, so that the second battery management device 220 may perform a corresponding action in response to the stop heating request.

In this embodiment, the second battery management device 220 may transmit the state information of the battery to the first battery management device 210 through a wireless connection to achieve precise control of the battery.

Alternatively, in the embodiment of the present application, the first battery management apparatus 210 is configured to transmit at least one of settlement information, power information, verification information, body posture information, and state information of the battery of the electric device to the third battery management apparatus 230 after establishing the wireless connection with the third battery management apparatus 230.

Both the settlement information and the power information may be used to assist in calculating the cost of the powered device required in this power change. And the verification information can be used to verify the matching of the powered device to the battery. The body posture information may assist in the battery-change control of the electric devices by the third battery management apparatus 230. And the state information of the battery is used for the third battery management device 230 to know the state of the battery. The third battery management device 230, after receiving the above-mentioned various information, may transmit the installed information, the installed state, etc. to the first battery management device 210 through a wireless connection, thereby completing a series of operations such as authentication, pack taking, pack unloading, pack packing, self-checking, and power-change completion station.

In this embodiment, the first battery management device 210 may send various information to the third battery management device 230 through a wireless connection, facilitating the third battery management device 230 to control the various devices to effect a power change at the power change station.

Optionally, in an embodiment of the present application, the third battery management device 230 is configured to determine whether to replace the battery at the power exchange station in response to the status information of the battery.

The electric device may be provided with one battery or a plurality of batteries. When the power consuming device is mounted with a plurality of batteries, the first battery management apparatus 210 may transmit state information of the plurality of batteries to the third battery management apparatus 230. Alternatively, the third battery management device 230 may determine whether to replace the battery at the battery exchange station based on the state information of the plurality of batteries. That is, it is determined that the battery is not replaced at the power exchange station as long as there is a fault on one of the batteries on the power utilization device that affects the power exchange.

In this embodiment, before the power is replaced, the third battery management apparatus 230 determines whether to replace the battery at the power-replacing station according to the state information of the battery on the power-using device, so as to avoid the situation that the battery is detached from the power-using device and returned, thereby being beneficial to improving the power-replacing efficiency.

Optionally, in an embodiment of the present application, the state information of the battery includes parameter information of the battery, where the parameter information includes at least one of an electric quantity, a voltage, and a temperature, and the third battery management device 230 is configured to determine fault information of the battery in response to the parameter information of the battery, and determine whether to replace the battery at the power exchange station according to the fault information of the battery.

Specifically, the second battery management device 220 monitors various parameter information of the battery, such as at least one of the amount of electricity, the voltage, and the temperature, in real time. The second battery management device 220 may periodically transmit the monitored parameter information to the first battery management device 210 through the wireless connection. When the powered device reaches the power exchange station, the third battery management apparatus 230 may receive parameter information transmitted by the first battery management apparatus 210 through a wireless connection. The third battery management device 230 may determine fault information of the battery according to the acquired parameter information of the battery; and the third battery management device 230 determines whether to replace the battery according to the fault information of the battery. For example, the third battery management apparatus 230 determines that the fault indicated by the fault information of the battery is a first-order fault based on the parameter information of the battery, and may consider the fault to be a fault affecting the replacement of the battery, so that it may be determined that the battery is not replaced; for another example, the third battery management apparatus 230 determines that the fault indicated by the fault information of the battery is a secondary fault based on the parameter information of the battery, and may consider the fault to be a fault that does not affect the replacement of the battery, and may thus determine to replace the battery.

In this embodiment, the fault information of the battery is determined by the third battery management device 230, not by the first battery management device 210. The third battery management device 230 does not need to read the fault information acquired by the first battery management device 210, so signaling overhead is reduced.

Optionally, in an embodiment of the present application, the state information of the battery includes fault information of the battery; the third battery management device 230 determines whether to replace the battery at the battery exchange station in response to the failure information of the battery.

In general, the first battery management apparatus 210 can acquire parameter information of the battery in real time, and when it is determined that the battery fails, it can query a failure code table to generate a failure code (i.e., failure information), and store the failure code in a storage unit on the power consumption device. When the electric device reaches the power exchange station, the third battery management apparatus 230 may acquire the fault code stored in the storage unit on the electric device through the first battery management apparatus 210, and then the third battery management apparatus 230 determines whether to exchange the battery according to the fault code.

For batteries, the fault may be large or small. Some faults may affect the power change, while some faults may not. The third battery management apparatus 230 determines not to replace the battery only if it is determined that there is a fault on the battery on the powered device that affects the power change. Conversely, if the battery on the powered device fails without affecting the battery replacement, the third battery management device 230 determines to replace the battery. For example, if the fault in which the battery exists is a primary fault, the fault may be considered to be a fault affecting the battery replacement, and the third battery management device 230 may determine not to replace the battery; for another example, if the fault existing in the battery is a secondary fault, the fault may be considered to be a fault that does not affect the replacement of the battery, and the third battery management device 230 may determine to replace the battery.

In this embodiment, the fault information is used to explicitly indicate the fault of the battery, so that the third battery management device 230 can directly use the fault information to determine whether to replace the battery, thereby reducing the complexity of the logic determination of the third battery management device 230.

Optionally, in an embodiment of the present application, the third battery management device 230 is configured to control the output device in the power exchange station to output power exchange information, where the power exchange information includes information indicating that power exchange is not allowed to the user, in a case where it is determined that the battery is not replaced in the power exchange station.

The third battery management apparatus 230 may control the output device within the battery exchange station to output information that the battery exchange is not permitted when it is determined that the battery is not to be exchanged. The user knows from the electricity exchanging information output by the output device that the electricity exchanging is not allowed, and the user can drive the electricity using device to drive away from the electricity exchanging station.

In this embodiment, the third battery management device 230 outputs information that the power change is not allowed to the user through the output device of the power change station, so that the user can timely know that the power utilization device has a fault that the power change is not allowed, and further can drive away from the power change station as soon as possible, so as not to influence the power utilization device needing the power change at the back.

Alternatively, in an embodiment of the present application, the output device may be a display screen. The output device may also be a broadcast.

In the embodiment, the power conversion information is output through the display screen, so that the method is convenient and visual.

Optionally, in an embodiment of the present application, the verification information includes identification information of the electric device and identification information of the battery, and the third battery management apparatus 230 is configured to query the identification information of the battery corresponding to the identification information of the electric device, and determine whether the queried identification information of the battery is consistent with the identification information of the battery in the verification information.

Specifically, in each power conversion process, the identification information of the power utilization device and the identification information of the battery replaced in the power conversion station can be bound, and the binding information is stored in the cloud. When the electric device arrives at the electric power conversion station again to perform electric power conversion, the third battery management device 230 in the electric power conversion station can search the identification information of the battery matched with the identification information of the electric device at the cloud according to the identification information of the electric device in the verification information sent by the first battery management device 210, compare the searched identification information of the battery with the identification information of the battery in the verification information, and if the comparison is consistent, the electric power conversion is agreed, and if the comparison is inconsistent, the electric power conversion is not agreed.

In this embodiment, the third battery management apparatus 230 may verify the identification information of the battery in response to the verification information, so that the occurrence of a situation that the power consumption device is inconsistent with the battery may be avoided, and thus, when abnormal actions such as battery replacement or battery replacement by mistake occur, the third battery management apparatus 230 may refuse to replace the battery, thereby improving the reliability of the power conversion process.

Optionally, as shown in fig. 3, the third battery management device 230 is wirelessly connected with the fourth battery management device 240.

In this embodiment, the fourth battery management device 240 may save a wire harness between the third battery management device 230 and the fourth battery management device 240 through a wireless connection with the third battery management device 230, so that costs may be saved.

Alternatively, in the embodiment of the present application, the third battery management unit 230 is configured to determine charging information according to the state information of the battery, and the fourth battery management device 240 is configured to control the battery to be charged in response to the charging information.

In this embodiment, by the communication between the first battery management device 210 and the second battery management device 220, the communication between the first battery management device 210 and the third battery management device 230, the communication between the fourth battery management device 240 and the second battery management device 220, and the communication between the third battery management device 230 and the fourth battery management device 240, the charging management process of the battery in the battery exchange station can be achieved without manual participation, and the charging management process can be automatically performed, thereby improving the efficiency of the charging management.

In other embodiments, the fourth battery management device 240 may also receive the state information of the battery sent by the second battery management device 220 through a wireless connection, and directly respond to the state information of the battery, and control the charging unit in the battery-changing cabinet to charge the battery. Alternatively, the third battery management unit 230 may be directly connected to the second battery management unit 220 wirelessly, so that the third battery management unit may directly acquire state information of the battery from the second battery management unit 220 and determine charging information based on the state information of the battery.

Further, after the fourth battery management device 240 controls the battery to be charged, the second battery management device 220 may further monitor whether the state information of the battery reaches a preset charge cutoff condition, and in case that the preset charge cutoff condition is reached, the second battery management device 220 may feed back the charge stop information to the fourth battery management device 240, and the fourth battery management device 240 re-controls the charging unit to stop charging the battery.

Alternatively, in an embodiment of the present application, the diagnostic device 250 is configured to send a fault clearing instruction to the first battery management device 210 in response to the fault information of the battery sent by the first battery management device 210 after the wireless connection is established with the first battery management device 210.

In particular, the faults that exist in batteries are generally classified into two main categories, one that can be cleared by software and one that requires maintenance of the battery. That is, the diagnosis means may parse the fault information of the battery, which is transmitted from the first battery management apparatus 210, after receiving the fault information to determine which kind the fault currently exists in the battery belongs to. If the first type of the battery management device belongs to the first type, the diagnosis device may send an instruction for clearing the current fault of the battery to the first battery management device 210, and then the first battery management device 210 may forward the instruction to the second battery management device 220 to clear the current fault of the battery.

In this embodiment, the diagnostic means transmits a fault clearing instruction to the first battery management device 210, so that the fault currently existing in the first battery can be cleared quickly.

For the second type of battery faults, a diagnostic person is required to subjectively analyze the faults of the battery currently, consult the data and contact the manufacturer technicians to repair the battery.

Optionally, when the diagnostician determines that the current fault of the battery is a second type of battery fault, the diagnostic device may query a fault case matched with the fault of the battery in the cloud according to the operation of the diagnostician, further query case information corresponding to the fault case, and display the case information to the diagnostician through an output device of the diagnostic device, so that the diagnostician maintains the battery.

The diagnostic person may be a worker or a technician at a maintenance station, or may be the driver himself.

Optionally, in an embodiment of the present application, the above-mentioned various wireless connections are bluetooth communications, and the network address is a medium access control (Media Access Control, MAC) address.

Alternatively, in other embodiments, the wireless connection may also be WiFi communication, zigBee communication, or the like.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

A power conversion system, comprising:

the first battery management equipment is arranged in the power utilization device;

the second battery management equipment is arranged in the battery in the power utilization device;

The third battery management device is arranged in a management device in the power exchange station and is used for controlling the power utilization device to exchange the battery in the power exchange station;

the first battery management device is wirelessly connected with the second battery management device, and the first battery management device is wirelessly connected with the third battery management device.
The power conversion system of claim 1, further comprising:

the fourth battery management device is arranged in a battery changing cabinet in the battery changing station, and the battery changing cabinet is used for charging the battery detached from the power utilization device;

the fourth battery management device is wirelessly connected with the second battery management device.
The power conversion system according to claim 1 or 2, characterized in that the power conversion system further comprises:

diagnostic means for performing a fault diagnosis of at least one of the electricity consumption device, the management device, and the battery;

the diagnostic device is wirelessly connected with the first battery management apparatus, the third battery management apparatus, and the second battery management apparatus, respectively.
A power conversion system according to any one of claims 1 to 3, characterized in that the third battery management device is adapted to initiate a wireless connection request to the first battery management device before the power consumer reaches the power conversion station and performs a power conversion.
The power conversion system according to any one of claims 1 to 4, wherein the first battery management device is configured to initiate a wireless connection request to the second battery management device in a case where a connection is not established with the second battery management device after the battery is mounted to the power utilization apparatus.
The power conversion system according to any one of claims 1 to 5, wherein the second battery management device is configured to send status information of the battery to the first battery management device after establishing a wireless connection with the first battery management device.
The power conversion system according to any one of claims 1 to 6, wherein the first battery management device is configured to transmit at least one of settlement information, electric quantity information, verification information, vehicle body posture information, and state information of the battery of the electric power consuming device to the third battery management device after establishing a wireless connection with the third battery management device.
The power conversion system according to claim 7, wherein the third battery management device is configured to determine whether to replace the battery at the power conversion station in response to status information of the battery.
The power conversion system according to claim 8, wherein the state information of the battery includes parameter information of the battery, the parameter information including at least one of an amount of electricity, a voltage, and a temperature;

the third battery management device is used for responding to the parameter information of the battery, determining fault information of the battery, and determining whether to replace the battery at the battery replacement station according to the fault information of the battery.
The power conversion system according to claim 8, wherein the state information of the battery includes failure information of the battery; the third battery management device is configured to determine whether to replace the battery at the battery exchange station in response to failure information of the battery.
A power conversion system according to any one of claims 8 to 10, characterized in that the third battery management device is adapted to control output means within the power conversion station to output power conversion information, including information indicating to a user that power conversion is not allowed, in case it is determined that the battery is not replaced by the power conversion station.
The power conversion system according to any one of claims 7 to 11, wherein the verification information includes identification information of the power consumption device and identification information of the battery, and the third battery management apparatus is configured to query the identification information of the battery corresponding to the identification information of the power consumption device, and determine whether the queried identification information of the battery matches the identification information of the battery in the verification information.
The power conversion system according to claim 2, wherein the third battery management device is wirelessly connected with the fourth battery management device.
The battery replacement system of claim 13 wherein the third battery management unit is configured to determine charging information based on status information of the battery, and the fourth battery management device is configured to control the battery to charge in response to the charging information.
A power conversion system according to claim 3, wherein the diagnostic means is configured to send a fault clearing instruction to the first battery management device in response to the fault information of the battery sent by the first battery management device after the wireless connection is established with the first battery management device.
A power conversion system according to any one of claims 1 to 15, wherein the wireless connection is a bluetooth communication.
The power conversion system according to claim 12, wherein the identification information of the battery is a medium access control MAC address.
The power conversion system according to any one of claims 1 to 17, wherein the third battery management device is wirelessly connected with the second battery management device.
The power conversion system according to any one of claims 1 to 18, wherein the battery management device is a battery management unit BMU.