CN212500001U - Battery charge and discharge control circuit, battery management control system and new energy automobile - Google Patents
Battery charge and discharge control circuit, battery management control system and new energy automobile Download PDFInfo
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- CN212500001U CN212500001U CN202020927150.8U CN202020927150U CN212500001U CN 212500001 U CN212500001 U CN 212500001U CN 202020927150 U CN202020927150 U CN 202020927150U CN 212500001 U CN212500001 U CN 212500001U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model relates to a circuit design technical field, concretely relates to battery charge-discharge control circuit, control method and new energy automobile. The discharge control circuit comprises a first switch, a second switch, a third switch, a fourth switch and a pre-charging resistor, wherein one end of the first switch is connected with the cathode of the battery, the other end of the first switch is connected with the cathode of the discharge load, the anode of the discharge load is connected with one end of the second switch, the other end of the second switch is connected with one end of the third switch, the anode of the battery at the other end of the third switch is connected, one end of the pre-charging resistor is connected with the anode of the battery, the other end of the pre-charging resistor is connected with one end of the fourth switch, the other end of the fourth switch is connected with the other end of the second switch, during discharging, the pre-charging operation is firstly carried out on the discharging load, so that the current in the circuit is slowly increased, after the pre-charging operation is completed, the discharging is carried out, therefore, the damage to each element caused by the large current generated by directly closing a plurality of switches is avoided, and the elements or the whole circuit are damaged.
Description
Technical Field
The utility model relates to a circuit design technical field, concretely relates to battery charge-discharge control circuit, battery management control system and new energy automobile.
Background
An important function of the battery management system BMS is to protect the battery, and how to protect the battery, a simple and effective method is to eliminate the charging and discharging current of the battery, so that the control of the charging and discharging switch becomes the standard allocation of the BMS; the BMS controls the relay in 2 types, one type is strong control, namely absolute control, the BMS is not influenced by external equipment (mainly a VCU new energy automobile whole vehicle controller), and the on-off of a switch in a circuit is autonomously controlled according to the safety state of a battery; the other is weak control, relative control, the BMS basically has no autonomous control right, and needs to receive a command sent by the VCU and control the on-off of a switch in a circuit according to the command. In the weak control, after the VCU sends a control command for controlling the switch, the BMS performs an operation of turning on or off the switch in the circuit according to the real-time command of the VCU. However, VCUs are not specialized circuit switch management devices that require the switching on and off of switches without taking into account the risks that switches can present; for example, the VCU sends a close at the same time, and the plurality of switches in the control circuit are simultaneously closed to achieve the purpose of discharging, and at this time, if the BMS completely closes the plurality of switches simultaneously according to the VCU command to turn on a large circuit, the plurality of switches may be stuck to permanently damage the plurality of switches, or the load is burned down, so that the circuit is damaged. Therefore, it can be seen that the existing control circuit has certain defects.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem of main solution is that current battery charge-discharge control circuit arouses circuit or switch harm easily.
A battery charge and discharge control circuit comprises a discharge control loop, wherein the discharge control loop comprises a first switch, a second switch, a third switch, a fourth switch and a pre-charging resistor;
one end of the first switch is connected with the negative electrode of the battery, the other end of the first switch is connected with the negative electrode of the discharging load, the positive electrode of the discharging load is connected with one end of the second switch, the other end of the second switch is connected with one end of the third switch, and the other end of the third switch is connected with the positive electrode of the battery, so that a discharging loop is formed;
one end of the pre-charging resistor is connected with the anode of the battery, the other end of the pre-charging resistor is connected with one end of the fourth switch, and the other end of the fourth switch is connected with the other end of the second switch, so that a discharging pre-charging loop is formed.
In one embodiment, the charging control circuit further comprises a fifth switch, one end of the fifth switch is connected with one end of the third switch, the other end of the fifth switch is connected with the positive electrode of a charging load, and the negative electrode of the charging load is connected with the other end of the first switch, so that a charging control loop is formed;
the other end of the fourth switch is also connected with one end of the fifth switch, so that a charging pre-charging loop is formed.
In one embodiment, the first switch, the second switch, the third switch, the fourth switch and the fifth switch are all relays.
In one embodiment, the charging control system further comprises a battery management system, wherein the battery management system is connected with the battery and the control end of the relay and used for receiving a control signal to control the on-off of the relay so as to control the on-off operation of the discharging control loop or the charging control loop.
In one embodiment, the system further comprises an upper computer and/or a VCU, wherein the upper computer and/or the VCU are in communication connection with the battery management system through a CAN bus and used for sending control signals to the battery management system.
A battery management control system for a new energy automobile comprises a battery, a charge and discharge control circuit, a battery management system and a VCU;
the charging and discharging control circuit is electrically connected with the battery to form a charging control loop and a discharging control loop;
the battery management system is in communication connection with the charging and discharging control circuit and is used for receiving control signals to control the connection and disconnection of the charging control circuit and the discharging control circuit;
the VCU is in communication connection with the battery management system through the CAN bus and is used for sending a control signal to the battery management system.
In one embodiment, the discharge control loop comprises a first switch, a second switch, a third switch, a fourth switch and a pre-charging resistor;
one end of the first switch is connected with the negative electrode of the battery, the other end of the first switch is connected with the negative electrode of the discharging load, the positive electrode of the discharging load is connected with one end of the second switch, the other end of the second switch is connected with one end of the third switch, and the other end of the third switch is connected with the positive electrode of the battery, so that a discharging loop is formed;
one end of the pre-charging resistor is connected with the anode of the battery, the other end of the pre-charging resistor is connected with one end of the fourth switch, and the other end of the fourth switch is connected with the other end of the second switch, so that a discharging pre-charging loop is formed.
In one embodiment, the charging control circuit further comprises a fifth switch, one end of the fifth switch is connected with one end of the third switch, the other end of the fifth switch is connected with the positive electrode of a charging load, and the negative electrode of the charging load is connected with the other end of the first switch, so as to form the charging control loop;
the other end of the fourth switch is also connected with one end of the fifth switch, so that a charging pre-charging loop is formed.
In one embodiment, the first switch, the second switch, the third switch, the fourth switch and the fifth switch are all relays, and control ends of the relays are connected with the battery management system through signal lines.
A new energy automobile comprises the battery charging and discharging control circuit or the battery management control system.
According to the battery charging and discharging control circuit of the embodiment, the battery charging and discharging control circuit comprises a discharging control loop, the discharging control loop comprises a first switch, a second switch, a third switch, a fourth switch and a pre-charging resistor, one end of the first switch is connected with the negative electrode of the battery, the other end of the first switch is connected with the negative electrode of the discharging load, the positive electrode of the discharging load is connected with one end of the second switch, the other end of the second switch is connected with one end of the third switch, and the positive electrode of the battery at the other end of the third switch is connected, so that the discharging loop is formed. One end of the pre-charging resistor is connected with the positive electrode of the battery, the other end of the pre-charging resistor is connected with one end of the fourth switch, and the other end of the fourth switch is connected with the other end of the second switch, so that a discharging pre-charging loop is formed. When discharging, the first switch, the second switch and the fourth switch are firstly controlled to be turned off in sequence, so that the discharging pre-charging loop works, the pre-charging operation is carried out on a discharging load, the current in the circuit slowly rises, and after the pre-charging operation is completed, the third switch is closed and the fourth switch is turned off at the same time to discharge, so that the damage to each element in a large-current pair generated by directly closing a plurality of switches is avoided, and the damage to components or the damage to the whole circuit is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a battery charge and discharge control circuit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a battery management control system according to an embodiment of the present application;
FIG. 3 is a flowchart of a discharge control method according to an embodiment of the present application;
fig. 4 is a flowchart of a charging control method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a battery charge and discharge control circuit according to another embodiment of the present application.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning.
The first embodiment is as follows:
referring to fig. 1, the present embodiment provides a battery charging and discharging control circuit, as shown in fig. 1, which includes a discharging control circuit, the discharging control circuit includes a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, and a pre-charging resistor R.
One end of the first switch S1 is connected to the negative electrode of the battery U, the other end is connected to the negative electrode of the discharge load RL, the positive electrode of the discharge load RL is connected to one end of the second switch S2, the other end of S2 of the second switch is connected to one end of the third switch S3, and the other end of the third switch S3 is connected to the positive electrode of the battery U, so that a discharge loop is formed, and the battery can discharge the load RL.
When charging, firstly, the switches S1, S2 and S4 are closed, so that the discharging pre-charging circuit is switched on, discharging pre-charging operation is performed, voltage at two ends of the discharging load RL is slowly increased, the switch S3 is closed again when the voltage is increased to a preset value of the battery U, the switch S4 is disconnected, the battery U performs continuous discharging, so that the switches S1, S2 and S3 are prevented from being closed simultaneously, transient current in the circuit is too large, and the risk of burning components or the load RL is avoided.
Furthermore, the battery charging and discharging control circuit further includes a fifth switch S5, one end of the fifth switch S5 is connected to one end of the third switch S3, the other end is connected to the positive electrode of the charging load DC, and the negative electrode of the charging load DC is connected to one end of the first switch S1, so as to form a charging control loop for charging the battery U. Meanwhile, the other end of the fourth switch S4 is also connected to one end of the fifth switch S5, and the battery U, the precharge resistors R, S4, S5, DC, and S1 form a charging precharge circuit. During charging, the fifth switches S5, S1 and S4 are sequentially closed, so that the pre-charging circuit is turned on to perform the pre-charging operation, and after the pre-charging operation is completed, the switch S4 is opened and the switch S3 is closed, so that the load DC stably charges the battery U.
In this embodiment, the first switch, the second switch, the third switch, the fourth switch and the fifth switch are all relays, and the relays can be conveniently controlled to be turned on and off.
Further, the battery charge and discharge control circuit of this embodiment still includes battery management system BMS, and battery management system BMS is used for carrying out charge and discharge management to battery U, and battery management system BMS passes through the voltage acquisition line to be connected with the battery, and battery management system BM passes through the control signal line to be connected with the control end of five relays simultaneously, and BMS is used for receiving control signal in order to control the break-make of relay, and then control discharge control circuit or charge control circuit switch on work.
Further, the battery charge-discharge control circuit of this embodiment still includes host computer and VCU, and host computer and VCU pass through CAN bus and battery management system BMS communication connection, and host computer and VCU are used for sending control signal to battery management system BMS to control battery discharge or charge the battery.
Example two
Based on the battery charge and discharge control circuit provided in the first embodiment, the first embodiment provides a battery charge and discharge control method, which includes a discharge control method, as shown in fig. 3, where the discharge control method includes:
step 201: the battery management system judges whether a first control signal sent by the VCU is received in real time, and if so, the second switch is controlled to be conducted;
step 202: after the second switch is switched on, the battery management system judges whether a first control signal sent by the VCU is received in real time, and if so, the first switch is controlled to be switched on;
step 203: after the first switch is conducted, the battery management system judges whether a fourth control signal sent by the VCU is received or not in real time, if so, the fourth switch is controlled to be conducted, and pre-charging operation is carried out;
step 204: and the battery management system judges whether the pre-charging operation is finished in real time, and controls the third switch to be switched on and discharge if receiving a third control signal sent by the VCU after finishing the pre-charging operation.
Further, the present embodiment also provides a charging control method, as shown in fig. 4, where the charging control method includes:
step 301: the battery management system judges whether a fifth control signal sent by the VCU is received in real time, and if so, the fifth switch is controlled to be conducted;
step 302: after the fifth switch is switched on, the battery management system judges whether a second control signal sent by the VCU is received in real time, and if so, the first switch is controlled to be switched on;
step 303: after the first switch is conducted, the battery management system judges whether a fourth control signal sent by the VCU is received or not in real time, if so, the fourth switch is controlled to be conducted, and pre-charging operation is carried out;
step 304: and the battery management system judges whether the pre-charging operation is finished in real time, and controls the third switch to be switched on for charging if a third control signal sent by the VCU is received after the pre-charging operation is finished.
Further, the charge/discharge control method of the present embodiment further includes: after the third switch is turned on, the battery management system also judges whether a first turn-off signal sent by the VCU is received in real time, and if so, the third switch is controlled to be turned off.
Specifically, the battery management system in this embodiment of the present invention determines whether the pre-charging operation is completed in real time includes: the battery management system acquires the load voltage at two ends of the discharging load or the charging load in real time, and if the load voltage exceeds eighty percent of the battery voltage, the pre-charging operation is judged to be finished.
EXAMPLE III
The embodiment provides a battery management control system for a new energy automobile, which comprises a battery, a charging and discharging control circuit, a battery management system and a VCU.
As shown in fig. 2, the charge and discharge control circuit is electrically connected to the battery to form a charge control circuit and a discharge control circuit; the battery management system is in communication connection with the charging and discharging control circuit and is used for receiving control signals to control the connection and disconnection of the charging control circuit and the discharging control circuit. The VCU is in communication connection with the battery management system through the CAN bus and is used for sending a control signal to the battery management system.
The discharge control loop and the charge control loop are the same as those in the first embodiment, and are not described herein again.
Example four
The embodiment provides a new energy automobile, and the new energy automobile is provided with a battery charging and discharging control circuit provided in the first embodiment or a battery management control system provided in the third embodiment.
EXAMPLE five
On the basis of the first embodiment, the present embodiment provides a battery charging and discharging control circuit, which includes a discharging control circuit, where the discharging control circuit includes a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, and a pre-charging resistor R. In this embodiment, the first switch, the second switch, the third switch, the fourth switch and the fifth switch are all relays, and the relays can be conveniently controlled to be turned on and off. As shown in fig. 5, the first switch S1 is a total negative relay, the second switch S2 is an electric drive relay, the third switch S3 is a total positive relay, the fourth switch S4 is a precharge relay, and the fifth switch S5 is a charge relay.
In on-vehicle BMS system, BMS direct control battery always positive relay, battery always negative relay, pre-charge relay, electricity drive high voltage relay, charging relay. The battery main positive relay is connected with the battery high-voltage positive electrode; the battery total negative relay is connected with a battery high-voltage negative electrode; the pre-charging relay is connected with the pre-charging resistor in series and then connected with the battery main positive relay in parallel. One end of the electrically-driven high-voltage relay is connected with the main positive relay, and the other end of the electrically-driven high-voltage relay is connected with an electrically-driven high-voltage input positive electrode; charging relay one end is connected total positive relay, and the other end is connected and is filled electric pile output positive pole. Necessary overcurrent protection measures in BMS management system software are used for preventing the relay from being damaged due to overlarge current. The pre-charging resistor R is used for preventing the battery from discharging the large load capacitor to cause short circuit at the moment when the relay is opened. The pre-charging resistor R needs to have a certain over-current capability and heat dissipation capability.
According to the embodiment, aiming at the BMS weak relay control strategy, the control capability of the BMS on the relay is greatly reduced, so that the risk of the relay damage is greatly increased; if a series of preset control time sequences are added in the BMS program, the BMS can not execute the wrong command by mistake when the VCU sends out the disordered and even wrong command, but firstly considers the safety and the risk; on the basis of ensuring safety, the VCU commands are executed, so that the whole power system is safer and more reliable. The control steps of this embodiment are as follows:
5-1 discharge mode:
bms self-test was completed without any failure.
Bms receives VCU commands and enters discharge mode according to the relevant commands.
BMS judges whether the VCU has a command for issuing and closing the electrically-driven high-voltage relay, if so, the electrically-driven high-voltage relay is closed, otherwise, the command is continuously waited.
And step4.BMS judges whether the VCU issues a command for closing the total negative relay of the battery, if so, the total negative relay of the battery is closed, otherwise, the command is continuously waited.
And step5.BMS judges whether the VCU issues a command for closing the pre-charging relay, if so, the pre-charging relay is closed, otherwise, the command is continuously waited.
And step6, after the pre-charging relay is closed, the BMS judges whether the pre-charging is successful, after the pre-charging is successful, a pre-charging success mark is sent to the VCU, then the VCU is waited to issue a command for closing the battery main positive relay, if the command exists, the battery main positive relay is closed, otherwise, the command is continuously waited.
And step7.BMS judges whether the VCU issues a command of turning off the pre-charging relay, if so, the pre-charging relay is turned off, otherwise, the command is continuously waited.
And 5, formally entering a discharging mode by the BMS, and discharging the external load by the battery at high power.
5-2 charging mode:
bms self-test was completed without any failure.
Bms receives VCU commands and enters charging mode according to the relevant commands.
And step3.BMS judges whether the VCU issues a command for closing the charging relay, if so, the charging relay is closed, otherwise, the command is continuously waited.
And step4.BMS judges whether the VCU issues a command for closing the total negative relay of the battery, if so, the total negative relay of the battery is closed, otherwise, the command is continuously waited.
And step5.BMS judges whether the VCU issues a command for closing the pre-charging relay, if so, the pre-charging relay is closed, otherwise, the command is continuously waited.
And step6, after the pre-charging relay is closed, the BMS judges whether the pre-charging is successful, after the pre-charging is successful, a pre-charging success mark is sent to the VCU, then the VCU is waited to issue a command for closing the battery main positive relay, if the command exists, the battery main positive relay is closed, otherwise, the command is continuously waited.
And step7.BMS judges whether the VCU issues a command of turning off the pre-charging relay, if so, the pre-charging relay is turned off, otherwise, the command is continuously waited.
And 5, formally entering a charging mode by the BMS, and charging the battery by the charging pile in a high-power mode.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (10)
1. A battery charge and discharge control circuit is characterized by comprising a discharge control loop, wherein the discharge control loop comprises a first switch, a second switch, a third switch, a fourth switch and a pre-charging resistor;
one end of the first switch is connected with the negative electrode of the battery, the other end of the first switch is connected with the negative electrode of the discharging load, the positive electrode of the discharging load is connected with one end of the second switch, the other end of the second switch is connected with one end of the third switch, and the other end of the third switch is connected with the positive electrode of the battery, so that a discharging loop is formed;
one end of the pre-charging resistor is connected with the anode of the battery, the other end of the pre-charging resistor is connected with one end of the fourth switch, and the other end of the fourth switch is connected with the other end of the second switch, so that a discharging pre-charging loop is formed.
2. The battery charge and discharge control circuit of claim 1, further comprising a fifth switch, wherein one end of the fifth switch is connected to one end of the third switch, the other end of the fifth switch is connected to a positive terminal of a charging load, and a negative terminal of the charging load is connected to the other end of the first switch, thereby forming a charging control loop;
the other end of the fourth switch is also connected with one end of the fifth switch, so that a charging pre-charging loop is formed.
3. The battery charge and discharge control circuit of claim 2, wherein the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are relays.
4. The battery charging and discharging control circuit according to claim 3, further comprising a battery management system, wherein the battery management system is connected to the battery and the control terminal of the relay, and is configured to receive a control signal to control the on/off of the relay, so as to control the on/off operation of the discharging control circuit or the charging control circuit.
5. The battery charging and discharging control circuit according to claim 4, further comprising an upper computer and/or a VCU, wherein the upper computer and/or the VCU is in communication connection with the battery management system through a CAN bus, and is configured to send a control signal to the battery management system.
6. A battery management control system for a new energy automobile is characterized by comprising a battery, a charge and discharge control circuit, a battery management system and a VCU;
the charging and discharging control circuit is electrically connected with the battery to form a charging control loop and a discharging control loop;
the battery management system is in communication connection with the charging and discharging control circuit and is used for receiving control signals to control the connection and disconnection of the charging control circuit and the discharging control circuit;
the VCU is in communication connection with the battery management system through the CAN bus and is used for sending a control signal to the battery management system.
7. The battery management control system of claim 6, wherein the discharge control loop comprises a first switch, a second switch, a third switch, a fourth switch, and a pre-charge resistor;
one end of the first switch is connected with the negative electrode of the battery, the other end of the first switch is connected with the negative electrode of the discharging load, the positive electrode of the discharging load is connected with one end of the second switch, the other end of the second switch is connected with one end of the third switch, and the other end of the third switch is connected with the positive electrode of the battery, so that a discharging loop is formed;
one end of the pre-charging resistor is connected with the anode of the battery, the other end of the pre-charging resistor is connected with one end of the fourth switch, and the other end of the fourth switch is connected with the other end of the second switch, so that a discharging pre-charging loop is formed.
8. The battery management control system of claim 7, further comprising a fifth switch, wherein one end of the fifth switch is connected to one end of the third switch, the other end of the fifth switch is connected to a positive terminal of a charging load, and a negative terminal of the charging load is connected to the other end of the first switch, thereby forming the charging control loop;
the other end of the fourth switch is also connected with one end of the fifth switch, so that a charging pre-charging loop is formed.
9. The battery management control system of claim 8, wherein the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are all relays, and a control terminal of the relay is connected to the battery management system through a signal line.
10. A new energy automobile, characterized by comprising the battery charge-discharge control circuit according to any one of claims 1 to 5 or the battery management control system according to any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020927150.8U CN212500001U (en) | 2020-05-27 | 2020-05-27 | Battery charge and discharge control circuit, battery management control system and new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020927150.8U CN212500001U (en) | 2020-05-27 | 2020-05-27 | Battery charge and discharge control circuit, battery management control system and new energy automobile |
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| CN212500001U true CN212500001U (en) | 2021-02-09 |
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| CN202020927150.8U Active CN212500001U (en) | 2020-05-27 | 2020-05-27 | Battery charge and discharge control circuit, battery management control system and new energy automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114274831A (en) * | 2021-12-28 | 2022-04-05 | 徐州徐工新能源汽车有限公司 | Battery replacement assembly, control method thereof, battery replacement vehicle and battery replacement system |
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2020
- 2020-05-27 CN CN202020927150.8U patent/CN212500001U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114274831A (en) * | 2021-12-28 | 2022-04-05 | 徐州徐工新能源汽车有限公司 | Battery replacement assembly, control method thereof, battery replacement vehicle and battery replacement system |
| CN114274831B (en) * | 2021-12-28 | 2024-03-15 | 徐州徐工新能源汽车有限公司 | Battery power conversion assembly and control method thereof, power conversion car and power conversion system |
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