CN219007608U - Electric vehicle - Google Patents
Electric vehicle Download PDFInfo
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- CN219007608U CN219007608U CN202223601924.6U CN202223601924U CN219007608U CN 219007608 U CN219007608 U CN 219007608U CN 202223601924 U CN202223601924 U CN 202223601924U CN 219007608 U CN219007608 U CN 219007608U
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- switching tube
- battery
- conversion device
- comparator
- protection circuit
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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
Abstract
The utility model discloses an electric vehicle, comprising: a frame; a suspension assembly; a walking assembly; the power assembly comprises a first battery and a second battery; the voltage conversion device is respectively connected with the first battery and the second battery and is used for adjusting the voltage of the first battery so as to charge the second battery; the electric vehicle further comprises a protection circuit, the protection circuit is connected with the voltage conversion device, the protection circuit is further connected to the second battery, and the protection circuit can cut off a connecting passage between the voltage conversion device and the second battery under the condition that the current of the second battery flows backwards; the detection circuit is connected with the protection circuit and is also connected to the voltage conversion device, and the detection circuit can control the voltage conversion device to stop working under the condition that the protection circuit is abnormal. Through the arrangement, the protection effect on the protection circuit and the voltage conversion device is improved on the basis that current backflow can be prevented.
Description
Technical Field
The utility model relates to the field of vehicles, in particular to an electric vehicle.
Background
In recent years, with the rapid development of the new energy automobile industry, the DC/DC converter on the automobile can realize the conversion of direct current voltages with different magnitudes, and can convert the output voltage of the high-voltage battery on the automobile into low voltage to supply power to the low-voltage power supply equipment on the automobile and charge the low-voltage battery; when the voltage of the battery is higher than the voltage of the DC/DC and the DC/DC stops working, the output battery is connected to the output end of the DC/DC, if a backflow preventing circuit is not arranged, the battery at the low voltage side can continuously discharge, so that on one hand, the internal circuit of the DC/DC can be damaged, and on the other hand, the battery at the low voltage side can be damaged or the battery at the low voltage side can be damaged.
The output end of the existing anti-backflow circuit is connected to the MOS control circuit, once the MOS control circuit has a problem, the MOS tube in the MOS control circuit is not conducted, the DC/DC converter is still in a normal working state, and the anti-backflow MOS control circuit is easy to damage.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model aims to provide an electric vehicle capable of preventing the damage of a backward current to a DC/DC converter.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an electric vehicle includes a frame; the suspension assembly is connected with the frame; the walking assembly is connected with the frame through the suspension assembly; the power assembly is at least partially arranged on the frame and comprises a first battery and a second battery, the first battery is used for providing power for the electric vehicle, and the voltage of the first battery is larger than that of the second battery; the controller is connected with a second battery, and the second battery supplies power for the controller; the voltage conversion device is respectively connected with the first battery and the second battery and is used for adjusting the voltage of the first battery so as to charge the second battery;
the electric vehicle further comprises a protection circuit, the protection circuit is connected with the voltage conversion device, the protection circuit is further connected to the second battery, and the protection circuit can cut off a connecting passage between the voltage conversion device and the second battery under the condition that the current of the second battery flows backwards;
the detection circuit is connected with the protection circuit and is also connected to the voltage conversion device, and the detection circuit can control the voltage conversion device to stop working under the condition that the protection circuit is abnormal.
Further, the protection circuit comprises a comparator and an adjusting resistor, the comparator comprises a first input end and a second input end, the adjusting resistor is connected with the second input end of the comparator, and the adjusting resistor can adjust the voltage threshold value of the second input end of the comparator; the comparator is capable of outputting a high level when the voltage at the first input terminal of the comparator is greater than the voltage threshold at the second input terminal of the comparator, and the protection circuit cuts off the connection path between the voltage conversion device and the second battery in response to the high level output by the comparator.
Further, the adjusting resistor at least comprises a first adjusting resistor and a second adjusting resistor, and one end of the first adjusting resistor and one end of the second adjusting resistor, which are mutually connected, are connected with the second input end of the comparator; the voltage threshold at the second input of the comparator can be adjusted by the first adjusting resistor and/or the second adjusting resistor.
Further, the protection circuit comprises a first switching tube and a second switching tube, the comparator further comprises an output end, the second switching tube is connected with the output end of the comparator through the first switching tube, and the first switching tube can respond to the high level output by the comparator to control the second switching tube to be disconnected.
Further, the first switching tube and the second switching tube are both arranged as N-type field effect tubes.
Further, the detection circuit comprises a third switching tube and a self-checking control port, the third switching tube is connected with the self-checking control port, the third switching tube is set to be an NPN triode, the base electrode of the third switching tube is connected with the self-checking control port, and the detection circuit can be matched with the self-checking control port through the third switching tube to detect the protection circuit under different level differences.
Further, the detection circuit further comprises a fourth switching tube, the fourth switching tube is a PNP triode, the base electrode of the fourth switching tube is connected with the collector electrode of the third switching tube, and the third switching tube can control connection or disconnection of the fourth switching tube.
Further, the first switch tube, the second switch tube, the third switch tube and the fourth switch tube are all provided with protection modules capable of dividing and filtering.
Further, the detection circuit further comprises a fifth switching tube, the fifth switching tube is an NPN triode, a base electrode of the fifth switching tube is connected with an output end of the voltage conversion device, a collector electrode of the fifth switching tube is connected with a source electrode of the second switching tube, an emitter electrode of the fifth switching tube is connected to an emitter of the third switching tube, and an emitter electrode of the fifth switching tube is grounded.
Further, the detection circuit also comprises a control module, and the control module is set as an MCU or a whole vehicle controller of the electric vehicle;
the control module is connected with the voltage conversion device, and can control the voltage conversion device to stop working under the condition that the protection circuit is abnormal.
Through setting up detection circuitry, on can preventing the basis that the electric current flows backward, promoted the protection effect to voltage conversion device.
Drawings
Fig. 1 is a schematic view of an electric vehicle in an embodiment of the present application.
Fig. 2 is a connection block diagram of the voltage conversion device in the embodiment of the present application.
Fig. 3 is a block diagram showing connection between the protection circuit and the detection circuit in the embodiment of the present application.
Fig. 4 is a circuit diagram of a protection circuit and a detection circuit in an embodiment of the present application.
Detailed Description
In order to make the present utility model better understood by those skilled in the art, the technical solutions in the specific embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1 and 2, an electric vehicle 100 includes a frame 11, a suspension assembly 12, a travel assembly 13, a power assembly 14, and a voltage conversion device 15. Suspension assembly 12 is coupled to frame 11, and walking assembly 13 is coupled to frame 11 via suspension assembly 12. The power assembly 14 is at least partially disposed on the frame 11, the power assembly 14 includes a first battery 141 and a second battery 142, the first battery 141 is configured to provide power to the electric vehicle 100, and a voltage of the first battery 141 is greater than a voltage of the second battery 142. The electric vehicle 100 also includes a controller 16, and a second battery 142 powers the controller 16 on the electric vehicle 100. The voltage conversion device 15 is at least partially disposed on the frame 11, the voltage conversion device 15 is connected to the first battery 141 and the second battery 142, and the voltage conversion device 15 is used for adjusting the voltage of the first battery 141 to charge the second battery 142, so as to avoid damage to the second battery 16. Wherein the voltage converting means 15 are arranged as DC/DC converters.
As shown in fig. 3 and 4, as one implementation, the electric vehicle 100 further includes a protection circuit 17, and the protection circuit 17 is at least partially disposed on the voltage conversion device 15. The voltage conversion device 15 includes an output terminal 151 connected to the second battery 16, and the protection circuit 17 is connected to the output terminal 151 of the voltage conversion device 15. In order to prevent the current of the second battery 16 from flowing backward to the voltage conversion device 15 to damage the voltage conversion device 15 when the voltage conversion device 15 stops operating or the voltage of the second battery 16 is greater than the voltage of the output terminal of the voltage conversion device 15, a protection circuit 17 is provided between the second battery 16 and the voltage conversion device 15. When the current at the second battery 16 sends a reverse current phenomenon, the protection circuit 17 can cut off the connection path between the second battery 16 and the voltage conversion device 15, thereby realizing the protection effect of the voltage conversion device 15.
As shown in fig. 4, specifically, the protection circuit 17 includes a comparator U1 and a regulating resistor R, the comparator U1 includes a first input terminal u+ and a second input terminal U-, the regulating resistor R is connected to the second input terminal U-of the comparator U1, and a voltage threshold V-of the second input terminal U-of the comparator U1 can be changed by the regulating resistor R, so that a reverse current that the protection circuit 17 can withstand is regulated. The regulating resistor R at least comprises a first regulating resistor R1 and a second regulating resistor R2, and the voltage threshold V-of the second input end U-of the comparator U1 meets the following relation:
wherein Vaux is set to the sum of the voltages of the first regulating resistor R1 and the second regulating resistor R2.
Further, the protection circuit 17 further includes a detection resistor Rsense, one end of which is converted from the voltageThe output 151 of the device 15 is connected, the other end of the sense resistor Rsense being connected to the first input u+ of the comparator U1, so that the first input u+ of the comparator U1 is able to receive the current flowing backwards by the second battery 142. And the voltage v+ at the first input terminal u+ of the comparator U1 satisfies the following relationship: v (V) + ＝I*R xense . Where I is set to the current level flowing backward to the protection circuit 17.
More specifically, the protection circuit 17 further includes a first switching tube Q1 and a second switching tube Q2, and the first switching tube Q1 and the second switching tube Q2 are each provided as an N-type field effect tube. Because the internal resistance of the N-type field effect transistor is smaller, the loss of the circuit is reduced, and the N-type field effect transistor is not easy to damage while bearing larger current. The grid of the first switch tube Q1 is connected with the output end of the comparator U1, the drain electrode of the first switch tube Q1 is connected with the grid of the second switch tube Q2, and the source electrode of the first switch tube Q1 is connected to the regulating resistor R. The drain electrode of the second switching tube Q2 is connected with the second input end U-of the comparator U1, the source electrode of the second switching tube Q2 is connected with the detection resistor Rsense, and the grid electrode of the second switching tube Q2 is connected with the output end of the comparator U1 through the first switching tube Q1. The protection circuit 17 is further provided with a built-in power supply BAT, and the gate of the second switching tube Q2 is connected to the built-in power supply BAT in addition to the first switching tube Q1.
When the voltage conversion device 15 and the second battery 142 are in a normal state, the second switching tube Q2 is turned on, so that the possibility of current transmission between the voltage conversion device 15 and the second battery 16 is realized. In the event of a current reversal between the second battery 16 and the voltage conversion device 15, the voltage v+ at the first input u+ of the comparator U1 is greater than the voltage threshold V-at the second input U-of the comparator U1. The output of the comparator U1 outputs a high level at this time. When the comparator U1 applies a high level to the gate of the first switching tube Q1, the first switching tube Q1 is turned on, and a connection path is established between the source and the drain of the first switching tube Q1. Further, since the drain of the first switching tube Q1 is grounded, the second switching tube Q2 does not satisfy the on condition in the case where the first switching tube Q1 is on, and the connection between the source and the drain of the second switching tube Q2 is disconnected. I.e. the second switching tube Q2 is in an off state, thereby avoiding a current at the second battery 16 flowing backward to the voltage converting device 15, and prolonging the service life of the voltage converting device 15.
In the present embodiment, the first switching tube Q1 and the second switching tube Q2 are both provided with a protection module 171 for protecting the first switching tube Q1 and the second switching tube Q2, and the voltage division filtering of the first switching tube Q1 and the second switching tube Q2 is implemented through the protection module 171, so that the first switching tube Q1 and/or the second switching tube Q2 are prevented from being broken down by high voltage static electricity. Wherein the protection module 171 comprises at least one resistor for dividing the voltage and the protection module 171 comprises at least one capacitor for filtering. Since the matching between the N-type field effect transistor and the protection module 171 is a common technical means in the art, the setting and the combination between the N-type field effect transistor and the protection module 171 are not described in detail.
As shown in fig. 3 and 4, as an implementation manner, the electric vehicle 100 further includes a detection circuit 18, where the detection circuit 18 is at least partially disposed on the voltage conversion device 15, and the detection circuit 18 is connected to the protection circuit 17, and the detection circuit 18 is further connected to an output terminal 151 of the voltage conversion device 15. The detection circuit 18 can detect whether the protection circuit 17 is in a normal state, and in the case where the protection circuit 17 is in an abnormal state, the detection circuit 18 can control the voltage conversion device 15 to stop operation. Thereby avoiding the voltage conversion device 15 from being damaged by the current flowing backward from the second battery 16 in the case of abnormality of the protection circuit 17. Wherein the abnormal state of the protection circuit 17 includes, but is not limited to, damage of components within the protection circuit 17, disconnection of components within the protection circuit 17.
Specifically, the detection circuit 18 further includes a control module 19, and the control module 19 is connected to the voltage conversion device 15. Wherein the control module 19 may be provided as at least one of an MCU (Microcontroller Unit, micro control unit), a vehicle controller of the electric vehicle 100. When the detection circuit 18 detects that the protection circuit 17 is in an abnormal state, the control module 19 can control the voltage conversion device 15 to stop working, so as to prevent the voltage conversion device 15 from being damaged due to the influence of the reverse current in time. Further, the control module 19 is connected to both ends of the second switching tube Q2, and detects a voltage value V1 of the second switching tube Q2, and the control module 19 can determine whether the protection circuit 17 is in a normal state based on the detected voltage value V1 of the second switching tube Q2.
Further, the detection circuit 18 includes a third switching transistor Q3 and a fourth switching transistor Q4, where the third switching transistor Q3 is configured as an NPN transistor, and the fourth switching transistor Q4 is configured as a PNP transistor. The detection circuit 18 includes a self-test control port 181, the self-test control port 181 being provided as an I/O interface so that the self-test control port 181 can coordinate a level difference between the detection circuit 18 and the voltage conversion device 15. The base of the third switching tube Q3 is connected with the self-checking control port 181, and a protection module 171 for protecting the third switching tube Q3 is arranged between the third switching tube Q3 and the self-checking control port 181, so that the third switching tube Q3 is prevented from being damaged, and the stability of the voltage transmitted to the third switching tube Q3 is improved. The base of the fourth switching tube Q4 is connected with the collector of the third switching tube Q3, the third switching tube Q3 can control the connection or disconnection of the fourth switching tube Q4, and a protection module 171 for protecting the fourth switching tube Q4 is arranged between the fourth switching tube Q4 and the third switching tube Q3, so that the damage of the fourth switching tube Q4 is avoided, and the stability of the voltage transmitted to the third switching tube Q3 is improved.
As an alternative implementation, when the self-checking control port 181 inputs a low level, since the third switching transistor Q3 is set to an NPN transistor, the third switching transistor Q3 does not satisfy the on condition, i.e., the third switching transistor Q3 is turned off. And under the condition that the third switching tube Q3 is disconnected, the fourth switching tube Q4 and the first switching tube Q1 do not meet the conducting condition. At this time, the built-in power supply BAT is in unidirectional conduction with the second switching tube Q2, so that the second switching tube Q2 is subjected to voltage division filtering, and then the conduction condition is met, and the second switching tube Q2 is turned on.
Specifically, a high level is output at the output terminal 151 of the voltage converting apparatus 15, and the voltage V1 between the source and the drain of the second switching transistor Q2 is detected by the control module 19. If the voltage V1 of the second switching tube Q2 is equal to 0, it indicates that the second switching tube Q2 is turned on, that is, the detection circuit 18 and the protection circuit 17 are in a normal state. If the voltage V1 of the second switching transistor Q2 is greater than 0, this indicates that the second switching transistor Q2 is turned off, and the detection circuit 18 and the protection circuit 17 are in an abnormal state. The control module 19 can control the voltage conversion device 15 to stop working so as to realize protection of the voltage conversion device 15, thereby prolonging the service life of the voltage conversion device 15.
As another alternative implementation, when the self-check control port 181 inputs a high level, since the third switching transistor Q3 is set to an NPN transistor, the third switching transistor Q3 satisfies a conduction condition.
The fourth switching tube Q4 meets the conducting condition after being subjected to partial pressure filtering treatment, and the fourth switching tube Q4 is conducted. Further, the first switching tube Q1 satisfies the conducting condition after the voltage division filtering process, and the first switching tube Q1 is conducted. When the first switching tube Q1 is turned on, the drain electrode of the first switching tube Q1 is grounded, so that the second switching tube Q2 does not meet the on condition, and the second switching tube Q2 is turned off.
Specifically, a high level is output at the output terminal 151 of the voltage converting apparatus 15, and the voltage V1 between the source and the drain of the second switching transistor Q2 is detected by the control module 19. If the voltage V1 of the second switching tube Q2 is greater than the preset voltage, it indicates that the second switching tube Q2 is turned off, that is, the detection circuit 18 and the protection circuit 17 are in a normal state. When the voltage V1 of the second switching transistor Q2 is equal to 0, the second switching transistor Q2 is turned on, and the detection circuit 18 and the protection circuit 17 are in an abnormal state. The control module 19 can control the voltage conversion device 15 to stop working so as to realize protection of the voltage conversion device 15, thereby prolonging the service life of the voltage conversion device 15.
In this embodiment, an equivalent resistor R3 can be disposed between the source and the drain of the second switching tube Q2, and when the second switching tube Q2 is turned off, the voltage across the equivalent resistor R3 is equal to the voltage V1 between the source and the drain of the second switching tube Q2. The control module 19 can detect whether the protection circuit 17 is in a normal state by measuring the voltages at two ends of the equivalent resistor R3, thereby realizing the control effect on the voltage conversion device 15.
As an alternative implementation, the detection circuit 18 further includes a fifth switching transistor Q5, where the fifth switching transistor Q5 is configured as an NPN transistor. The base of the fifth switching tube Q5 is connected to the output end 151 of the voltage conversion device 15, the collector of the fifth switching tube Q5 is connected to the source of the second switching tube Q2 through the detection resistor Rsense, the emitter of the fifth switching tube Q5 is connected to the emitter of the third switching tube Q3, and the emitter of the fifth switching tube Q5 is grounded. When the control module 19 detects the voltage across the equivalent resistor R3, the fifth switching tube Q5 is turned on by the high level generated when the output terminal 151 of the voltage conversion device 15 simulates the current flowing backward, so that the detection of whether the second switching tube Q2 works normally can be realized.
By the arrangement, the second switching tube Q2 is prevented from being subjected to high-voltage electrostatic breakdown, and the service lives of the protection circuit 17 and the detection circuit 18 are prolonged.
It can be understood that, when the current flows backward, the protection circuit 17 can output the voltage through the comparator U1, so as to further realize the control effect of turning on or off the second switching tube Q2. Therefore, determining that the second switching tube Q2 is in the normal state before the circuit operation is a precondition for realizing protection of the voltage converting means 15 by the protection circuit 17. Therefore, by providing the detection circuit 18, a high level or a low level equivalent to that at the time of current back-flowing is applied to the detection circuit 18 before the operation of the voltage conversion device 15. So that the detection circuit 18 can detect the second switching tube Q2, thereby ensuring that the protection circuit 17 can work normally. On the basis of being able to prevent the current from flowing backward, the protection effect of the protection circuit 17 and the voltage conversion device 15 is improved.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (10)
1. An electric vehicle comprising:
a frame;
a suspension assembly connected to the frame;
the walking assembly is connected with the frame through the suspension assembly;
the power assembly is at least partially arranged on the frame and comprises a first battery and a second battery, the first battery is used for providing power for the electric vehicle, and the voltage of the first battery is greater than that of the second battery;
the controller is connected with the second battery, and the second battery supplies power for the controller; and
the voltage conversion device is respectively connected with the first battery and the second battery and is used for adjusting the voltage of the first battery so as to charge the second battery; it is characterized in that the method comprises the steps of,
the electric vehicle further includes a protection circuit connected to the voltage conversion device, the protection circuit being further connected to the second battery, the protection circuit being capable of cutting off a connection path between the voltage conversion device and the second battery in a case where a current of the second battery flows backward;
and the detection circuit is connected with the protection circuit and is also connected to the voltage conversion device, and the detection circuit can control the voltage conversion device to stop working under the condition that the protection circuit is abnormal.
2. The electric vehicle of claim 1, characterized in that,
the protection circuit comprises a comparator and an adjusting resistor, wherein the comparator comprises a first input end and a second input end, the adjusting resistor is connected with the second input end of the comparator, and the adjusting resistor can adjust the voltage threshold value of the second input end of the comparator; the comparator is capable of outputting a high level when a voltage at a first input terminal of the comparator is greater than a voltage threshold value at a second input terminal of the comparator, and the protection circuit cuts off a connection path between the voltage conversion device and the second battery in response to the high level output from the comparator.
3. The electric vehicle of claim 2, characterized in that,
the adjusting resistor at least comprises a first adjusting resistor and a second adjusting resistor, and one end of the first adjusting resistor and one end of the second adjusting resistor, which are connected with each other, are connected with the second input end of the comparator; the voltage threshold of the second input of the comparator can be adjusted by the first adjusting resistor and/or the second adjusting resistor.
4. The electric vehicle of claim 2, characterized in that,
the protection circuit comprises a first switching tube and a second switching tube, the comparator further comprises an output end, the second switching tube is connected with the output end of the comparator through the first switching tube, and the first switching tube can respond to the high level output by the comparator to control the second switching tube to be disconnected.
5. The electric vehicle of claim 4, characterized in that,
the first switching tube and the second switching tube are both arranged as N-type field effect tubes.
6. The electric vehicle of claim 4, characterized in that,
the detection circuit comprises a third switching tube and a self-checking control port, wherein the third switching tube is connected with the self-checking control port, the third switching tube is set to be an NPN triode, the base electrode of the third switching tube is connected with the self-checking control port, and the detection circuit can detect the protection circuit under different level differences through the cooperation of the third switching tube and the self-checking control port.
7. The electric vehicle of claim 6, characterized in that,
the detection circuit further comprises a fourth switching tube, the fourth switching tube is a PNP triode, the base electrode of the fourth switching tube is connected with the collector electrode of the third switching tube, and the third switching tube can control connection or disconnection of the fourth switching tube.
8. The electric vehicle of claim 7, characterized in that,
the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are respectively provided with a protection module capable of dividing and filtering.
9. The electric vehicle of claim 6, characterized in that,
the detection circuit further comprises a fifth switching tube, the fifth switching tube is an NPN triode, the base electrode of the fifth switching tube is connected with the output end of the voltage conversion device, the collector electrode of the fifth switching tube is connected with the source electrode of the second switching tube, the emitter electrode of the fifth switching tube is connected to the emitter of the third switching tube, and the emitter electrode of the fifth switching tube is grounded.
10. The electric vehicle of claim 1, characterized in that,
the detection circuit further comprises a control module, wherein the control module is set to be an MCU or a whole vehicle controller of the electric vehicle;
the control module is connected with the voltage conversion device, and can control the voltage conversion device to stop working under the condition that the protection circuit is abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223601924.6U CN219007608U (en) | 2022-12-27 | 2022-12-27 | Electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223601924.6U CN219007608U (en) | 2022-12-27 | 2022-12-27 | Electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219007608U true CN219007608U (en) | 2023-05-12 |
Family
ID=86234665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223601924.6U Active CN219007608U (en) | 2022-12-27 | 2022-12-27 | Electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219007608U (en) |
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2022
- 2022-12-27 CN CN202223601924.6U patent/CN219007608U/en active Active
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