CN114779078A - Battery plug box electrical performance testing tool, system and testing method - Google Patents
Battery plug box electrical performance testing tool, system and testing method Download PDFInfo
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- CN114779078A CN114779078A CN202210314067.7A CN202210314067A CN114779078A CN 114779078 A CN114779078 A CN 114779078A CN 202210314067 A CN202210314067 A CN 202210314067A CN 114779078 A CN114779078 A CN 114779078A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
Abstract
The invention provides a battery plug box electrical performance testing tool, a battery plug box electrical performance testing system and a battery plug box electrical performance testing method. The electric performance test tool for the battery plug box is used for carrying out electric performance test on the battery plug box with a cooling fan, a plug box temperature detection unit is arranged in the battery plug box, the tool comprises a frame body, an environment temperature detection unit and a control unit, a test bin for placing the battery plug box is arranged in the frame body, a bin opening for the battery plug box to enter and exit the test bin and a cooling opening for communicating the test bin with the outside are formed in the frame body, a heat insulation plate is rotatably connected to the frame body at the cooling opening, and an opening and closing driving mechanism is in transmission connection with the heat insulation plate. According to the electrical performance test tool for the battery plug box, the temperature is detected by the environment temperature detection unit and the plug box temperature detection unit, the control unit judges and controls the opening and closing of the cooling fan and the action of the opening and closing driving mechanism, so that the battery plug box is at an appropriate test temperature and the accuracy of test data is ensured.
Description
Technical Field
The invention relates to the technical field of energy storage battery testing, in particular to a battery plug box electrical performance testing tool. The invention also relates to an electrical performance test system and a temperature control method for electrical performance test of the battery plug box.
Background
The Battery Subrack (Cell Subrack) is a Battery pack composed of a plurality of modules (modules) formed by connecting batteries in series and parallel, a box body (Structure), a Battery Management System (BMS), and other electrical and structural components. The Energy storage System can be formed by connecting plug boxes in series and in parallel in a container rack and matching with a combiner cabinet, a Power Conversion System (PCS), an Energy Management System (EMS) and other auxiliary equipment.
Generally, before the battery plug box is loaded into a container, the battery plug box needs to be installed on a battery rack for electrical performance test, and after the battery plug box is detected to be qualified, the battery plug box can be loaded into the container. Because the temperature during the test can influence the battery charge and discharge test result, it is necessary to ensure that the temperature of the test environment is in a stable state all the time.
The conventional testing equipment in the battery industry is a thermostat, and can be used for testing and verifying the electrical properties of batteries, modules and the like, but the realization of the temperature control function of the equipment needs to keep the temperature in the thermostat constant through continuous external power supply, so that the energy consumption is serious, the thermostat is only suitable for testing small objects, and the volume of the thermostat needs to be correspondingly increased along with the increase of the volume of a tested object, so that the cost is increased.
Based on this, the plug box battery rack can be selected when the battery plug box is tested, and the common plug box battery rack only considers the heat dissipation function when the plug box is tested, does not consider whether the plug box can normally operate in a low-temperature environment, and lacks an effective battery rack self-heat preservation means.
Disclosure of Invention
In view of this, the present invention is directed to a tool for testing electrical performance of a battery box, so as to stabilize temperature of a testing environment and ensure accuracy of testing data.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a battery subrack electrical performance test tool is used for testing electrical performance of a battery subrack with a cooling fan, a subrack temperature detection unit is arranged in the battery subrack, and the tool comprises a frame body, an environment temperature detection unit and a control unit; the frame body is internally provided with a test bin for placing the battery plug box, the frame body is provided with a bin opening for the battery plug box to enter and exit the test bin, and a heat dissipation opening for communicating the test bin with the outside, and the heat dissipation opening is provided with a heat insulation plate which is rotatably connected to the frame body and an opening and closing driving mechanism which is in transmission connection with the heat insulation plate;
the environment temperature detection unit is arranged on the frame body and is used for detecting the temperature in the test bin; the control unit with subrack temperature detecting element environmental temperature detecting element, and radiator fan with open and close actuating mechanism and link to each other, just the control unit basis subrack temperature detecting element with ambient temperature detecting element's detected signal can control radiator fan opens and close, and control open and close actuating mechanism action, and by the heated board switching the thermovent.
Furthermore, the heat dissipation ports are respectively arranged at two opposite sides of the test bin.
Furthermore, two groups of bin bodies are separated from the test bin, each group of bin bodies is a plurality of bin bodies which are arranged in an up-down stacked mode, and the two groups of bin bodies are arranged in one-to-one correspondence with the heat dissipation ports on the two sides.
Furthermore, the opening and closing driving mechanism comprises a motor in transmission connection with the heat insulation plate.
Further, the environment temperature detection units are arranged in the test bin in a plurality.
Compared with the prior art, the invention has the following advantages:
according to the electrical performance test tool for the battery plug box, the environmental temperature is detected by the environmental temperature detection unit, the current temperature in the test bin is detected by the plug box temperature detection unit, the detection signal is fed back to the control unit, and the control unit judges and controls the opening and closing of the cooling fan and controls the opening and closing driving mechanism to act, so that the battery plug box is at the proper test temperature and the accuracy of test data is ensured.
The invention also relates to a temperature control method for electrical property test of the battery plug box, which comprises the following steps:
acquiring the temperature in the battery inserting box and the ambient temperature in the test bin;
comparing the acquired temperature in the refrigerator with a preset temperature threshold, comparing the acquired environmental temperature with a preset environmental threshold, and respectively obtaining comparison results;
and controlling the opening and closing of the cooling fan and the action of the opening and closing driving mechanism according to the obtained comparison result, so that the heat-radiating opening is opened and closed by the heat-insulating plate.
Further, the preset internal temperature threshold includes an upper limit value of the internal temperature, and the preset environmental temperature threshold includes an upper limit value of the environmental temperature;
and when the comparison result meets the condition that the box body temperature is higher than the upper limit value of the box temperature and the environment temperature is higher than the upper limit value of the environment temperature, the radiating fan is controlled to be opened, and the heat-radiating opening is opened by the heat-insulating plate.
Further, the preset internal temperature threshold includes a lower internal temperature limit, and the preset ambient temperature threshold includes a lower ambient temperature limit;
and when the comparison result meets the condition that the box body temperature is lower than the lower limit value of the box temperature and the environment temperature is lower than the lower limit value of the environment temperature, the cooling fan is controlled to be closed, and the heat-radiating opening is closed by the heat-insulating plate.
Further, when the comparison result meets the condition that the box body temperature is higher than the upper limit value of the box temperature and the environment temperature is lower than the lower limit value of the environment temperature, the cooling fan is controlled to be started, and the heat-radiating opening is closed by the heat-insulating plate;
and when the comparison result meets the condition that the temperature of the box body is lower than the lower limit value of the temperature in the box body and the environmental temperature is higher than the upper limit value of the environmental temperature, the heat radiation fan is controlled to be closed, and the heat radiation opening is opened by the heat insulation plate.
The temperature control method for testing the electrical property of the battery plug box can automatically adjust the environmental temperature of the battery plug box according to different temperatures in the box and environmental temperatures, realize temperature control in the actual measurement process of the electrical property of the battery plug box and improve the accuracy of test data of the battery plug box.
In addition, the invention also provides a system for testing the electrical performance of the battery plug box, which is positioned in a working space and comprises a tool for testing the electrical performance of the battery plug box arranged in the working space and test equipment for testing the electrical performance of the battery plug box; and a temperature adjusting device for adjusting the temperature in the working space is arranged in the working space.
Compared with the prior art, the system for testing the electrical performance of the battery plug box has the same effect as the method for controlling the temperature for testing the electrical performance of the battery plug box, and the detailed description is omitted here.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic overall structure diagram of a battery box electrical performance testing tool according to a first embodiment of the present invention;
fig. 2 is a rear view of the electrical performance testing tool for the battery box according to the first embodiment of the invention.
Description of reference numerals:
1. a frame body; 10. a bin body separating body; 100. a bin mouth; 101. a heat dissipation port; 11. an ambient temperature detection unit; 2. a heat-insulating board; 20. an opening and closing driving mechanism; 200. a rotating shaft.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.
In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
The embodiment relates to a battery subrack electrical performance test fixture for carrying out electrical performance test on a battery subrack with a cooling fan, and a subrack temperature detection unit is arranged in the battery subrack. The battery plug-in box can be a plug-in box with a heat dissipation fan, and can also be various self-air-cooling plug-in boxes on the market.
On the overall structure, the tool comprises a frame body 1, an ambient temperature detection unit 11 and a control unit. Wherein, be equipped with the test bin that is used for placing the battery subrack in the support body 1, and be equipped with the bin mouth 100 that supplies the battery subrack business turn over test bin on the support body 1 to and with the thermovent 101 that test bin and external world link up, thermovent 101 department is equipped with rotates the heated board 2 of connecting on support body 1, and links to each other with the heated board 2 transmission and opens actuating mechanism 20.
In addition, the environment temperature detection unit 11 is disposed on the frame body 1 and is used for detecting the temperature in the test chamber. Specifically, the control unit is connected to the subrack temperature detection unit, the ambient temperature detection unit 11, and the cooling fan and the opening/closing driving mechanism 20, and the control unit can control the opening/closing of the cooling fan and the opening/closing driving mechanism 20 to move according to detection signals of the subrack temperature detection unit and the ambient temperature detection unit 11, and the heat-dissipating port 101 is opened/closed by the heat-insulating board 2.
According to the structure, the environment temperature detection unit 11 is used for detecting the environment temperature, the plug box temperature detection unit is used for detecting the current temperature in the test bin, a detection signal is fed back to the control unit, and the control unit judges and controls the on-off of the cooling fan and controls the on-off driving mechanism 20 to act, so that the battery plug box is at the appropriate test temperature, and the accuracy of test data is ensured.
Based on the above overall design, an exemplary structure of the electrical performance testing tool for the battery plug box of the embodiment is as shown in fig. 1 and fig. 2, it should be noted that except that the bin opening 100 and the heat dissipation opening 101 of the frame body 1 are both communicated with the external environment, and other sides of the frame body 1 are all closed. In addition, in order to improve the heat dissipation effect of the frame body 1 on the battery subrack, the heat dissipation ports 101 are respectively arranged at two opposite sides of the test bin, that is, the heat dissipation ports 101 are located at the left side and the right side of the frame body 1 in fig. 1. In addition, the frame body 1 can adopt an alloy frame with the surface sprayed with insulating paint so as to ensure the bearing property and the stability of the frame body 1.
In this embodiment, in order to improve the heat dissipation effect of the battery subrack in the test bin, the test bin is partitioned into two groups of bin bodies 10, each group of bin bodies 10 is a plurality of bin bodies stacked up and down, and the two groups of bin bodies 10 are arranged in one-to-one correspondence with the heat dissipation holes 101 on two sides, that is, each group of bin bodies 10 utilizes the heat dissipation hole 101 on the corresponding side to dissipate heat, so that the heat of the battery subrack in the test bin is conveniently discharged.
In addition, the control unit controls the opening and closing driving mechanism 20 to operate, so that the heat-dissipating port 101 is opened or closed by the heat-insulating plate 2. Specifically, open and close actuating mechanism 20 includes the motor that links to each other with the heated board 2 transmission, and the motor is connected with the pivot 200 of wearing to establish between heated board 2 and support body 1. After the motor receives the instruction that the control unit sent, heated board 2 rotates along with it when rotating pivot 200, so heated board 2 can cover and keep warm on thermovent 101, or, heated board 2 can expose thermovent 101 and dispel the heat. The heat insulation board 2 can be made of a non-metal material with good insulation performance so as to ensure the heat insulation performance of the frame body 1.
To ensure the accuracy of the detected data, the ambient temperature detection units 11 are a plurality disposed in the test chamber. The environment temperature detecting unit 11 adopts an environment temperature sensor, the environment temperature detecting unit 11 can be arranged on the back of the frame body 1, the environment temperature detecting units 11 can respectively detect the temperatures of different positions, and the average value of the environment temperature detecting units 11 can be taken as the environment temperature when the tool works, so that the control unit sends accurate instructions to radiate or preserve heat of the battery plug box.
The battery subrack performance test tool of this embodiment, by ambient temperature detecting element 11 and subrack temperature detecting element monitoring temperature, the control unit is according to subrack temperature detecting element and ambient temperature detecting element 11's detected signal, goes to control radiator fan and opens or close to open or close by motor control heated board 2, realize the controllability of the ambient temperature that the battery subrack is located in order to ensure the accuracy of test data. In addition, the environment temperature detection unit 11, the plug-in box temperature detection unit and the motor are adopted to rotate to realize temperature control in the electrical property test process, so that the energy consumption of the whole tool equipment is low, and the improvement of the practicability of the tool is facilitated.
Example two
The embodiment relates to a temperature control method for electrical performance test of a battery plug box, which specifically comprises the following steps:
acquiring the temperature in the battery inserting box and the ambient temperature in the test bin; comparing the acquired temperature in the box with a preset temperature threshold value in the box, comparing the acquired environment temperature with a preset environment threshold value, and respectively obtaining comparison results; according to the obtained comparison result, the opening and closing of the heat dissipation fan and the action of the opening and closing driving mechanism 20 are controlled, and the heat dissipation opening 101 is opened and closed by the heat insulation board 2.
In this embodiment, the preset internal temperature threshold includes an upper internal temperature limit, and the preset ambient temperature threshold includes an upper ambient temperature limit.
And when the comparison result meets the conditions that the temperature of the box body is greater than the upper limit value of the temperature in the box body and the environmental temperature is greater than the upper limit value of the environmental temperature, the cooling fan is controlled to be started, and the heat dissipation opening 101 is opened by the heat insulation plate 2.
In addition, the preset in-box temperature threshold includes an in-box temperature lower limit value, and the preset ambient temperature threshold includes an ambient temperature lower limit value.
When the comparison result meets the conditions that the temperature of the box body is lower than the lower limit value of the temperature in the box body and the environmental temperature is lower than the lower limit value of the environmental temperature, the cooling fan is controlled to be closed, and the heat-radiating opening 101 is closed by the heat-insulating plate 2;
when the comparison result meets the conditions that the temperature of the box body is higher than the upper limit value of the temperature in the box body and the environmental temperature is lower than the lower limit value of the environmental temperature, the cooling fan is controlled to be started, and the heat-radiating opening 101 is closed by the heat-insulating plate 2;
and when the comparison result meets the conditions that the temperature of the box body is lower than the lower limit value of the temperature in the box body and the environmental temperature is higher than the upper limit value of the environmental temperature, the cooling fan is controlled to be closed, and the heat-radiating opening 101 is opened by the heat-insulating plate 2.
The test temperature control method of the present embodiment will be specifically described below.
When the battery subrack is tested, the control unit judges whether the temperature in the box and the ambient temperature are in the temperature range or not according to the detection signal, if the body temperature is greater than the upper limit value of the temperature in the box and the ambient temperature is also greater than the upper limit value of the ambient temperature, the heat insulation plate 2 exposes the heat dissipation opening 101, and the heat dissipation fan and the heat dissipation opening 101 cool the battery subrack simultaneously. If the temperature of the box body is lower than the lower limit value of the temperature in the box and the environmental temperature is also lower than the lower limit value of the environmental temperature, the heat insulation plate 2 is closed to cover the heat dissipation opening 101, and the heat dissipation fan is closed to heat the battery inserting box.
It should be noted that, if the temperature of the box body is greater than the upper limit value of the temperature in the box body and the ambient temperature is less than the lower limit value of the ambient temperature, the control unit controls the cooling fan to be turned on at this time, the heat insulation board 2 rotates to close the heat dissipation opening 101, and the temperature of the box body is reduced due to the turning on of the cooling fan at this time; if the box body temperature is lower than the lower limit value of the box temperature and the environment temperature is higher than the upper limit value of the environment temperature, the cooling fan is controlled to be closed, the heat dissipation opening 101 is opened through the heat insulation board 2, and the box body temperature is influenced by the environment temperature and is increased. Therefore, in the test process of the battery plug box, the judgment can be made in time according to the box body temperature and the environment temperature.
The temperature control method for testing the electrical property of the battery plug box can automatically adjust the environmental temperature of the battery plug box according to different temperatures in the box and environmental temperatures, realize temperature control in the actual measurement process of the electrical property of the battery plug box and improve the accuracy of test data of the battery plug box.
In addition, the invention also relates to a system for testing the electrical performance of the battery plug box, which is positioned in a working space, the system comprises a tool for testing the electrical performance of the battery plug box arranged in the working space and testing equipment for testing the electrical performance of the battery plug box, and temperature adjusting equipment for adjusting the temperature in the working space is arranged in the working space.
It is worth mentioning that the temperature adjusting device in the working space may be an air conditioner, and when the ambient temperature and the in-box temperature in the working space are both lower than the lower limit values thereof, the ambient temperature in the working space needs to be raised by being matched with the temperature adjusting device until the in-box temperature and the ambient temperature are within the threshold values. The system for testing the electrical performance of the battery plug box has the same effect as the temperature control method for testing the electrical performance of the battery plug box, and the detailed description is omitted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a battery subrack electrical property test fixture for carry out the electrical property test to the battery subrack that has radiator fan, just be equipped with subrack temperature detecting element in the battery subrack, its characterized in that:
the tool comprises a frame body (1), an ambient temperature detection unit (11) and a control unit;
the battery box testing device is characterized in that a testing bin for placing the battery box is arranged in the frame body (1), a bin opening (100) for the battery box to enter and exit from the testing bin and a heat dissipation opening (101) for communicating the testing bin with the outside are formed in the frame body (1), and a heat insulation plate (2) rotatably connected to the frame body (1) and an opening and closing driving mechanism (20) in transmission connection with the heat insulation plate (2) are arranged at the heat dissipation opening (101);
the environment temperature detection unit (11) is arranged on the frame body (1) and is used for detecting the temperature in the test bin;
the control unit is connected with the inserting box temperature detection unit, the environment temperature detection unit (11) and the heat dissipation fan and the opening and closing driving mechanism (20), and the control unit can control the opening and closing of the heat dissipation fan and control the action of the opening and closing driving mechanism (20) according to detection signals of the inserting box temperature detection unit and the environment temperature detection unit (11), and the heat dissipation opening (101) is opened and closed through the heat insulation board (2).
2. The battery plug box electrical property test fixture of claim 1, characterized in that:
the heat dissipation ports (101) are respectively arranged on two opposite sides of the test bin.
3. The battery subrack electrical performance test fixture of claim 2, characterized in that:
the test bin is internally divided into two groups of bin bodies (10), each group of bin bodies (10) is a plurality of bin bodies which are arranged in an up-down stacked mode, and the two groups of bin bodies (10) are arranged in one-to-one correspondence with the heat dissipation ports (101) on the two sides.
4. The battery plug box electrical property test fixture of claim 1, characterized in that:
the opening and closing driving mechanism (20) comprises a motor which is in transmission connection with the heat insulation plate (2).
5. The electrical property test tool for the battery plug box according to any one of claims 1 to 4, characterized in that:
the environment temperature detection units (11) are arranged in the test bin.
6. A temperature control method for electrical performance test of a battery plug box is characterized by comprising the following steps:
the method is based on the battery box electrical property testing tool of any one of claims 1 to 5, and comprises the following steps:
acquiring the temperature in the battery inserting box and the ambient temperature in the test bin;
comparing the acquired temperature in the refrigerator with a preset temperature threshold value in the refrigerator, comparing the acquired environmental temperature with a preset environmental threshold value, and respectively obtaining comparison results;
according to the obtained comparison result, the opening and closing of the heat radiation fan are controlled, the opening and closing driving mechanism (20) is controlled to act, and the heat radiation opening (101) is opened and closed through the heat insulation board (2).
7. The battery box electrical performance test temperature control method of claim 6, characterized in that:
the preset temperature threshold in the box comprises an upper limit value of the temperature in the box, and the preset environment temperature threshold comprises an upper limit value of the environment temperature;
and the comparison result meets the condition that the box body temperature is greater than the upper limit value of the box temperature, when the environment temperature is greater than the upper limit value of the environment temperature, the radiating fan is controlled to be started, and the heat radiating opening (101) is started by the heat insulation plate (2).
8. The method for controlling the temperature in the electrical performance test of the battery plug box according to claim 7, wherein the method comprises the following steps:
the preset in-box temperature threshold comprises a lower in-box temperature limit value, and the preset environment temperature threshold comprises an environment temperature lower limit value;
and the comparison result meets the condition that the box body temperature is lower than the lower limit value of the box temperature, when the environment temperature is lower than the lower limit value of the environment temperature, the cooling fan is controlled to be closed, and the heat-radiating opening (101) is closed by the heat-insulating plate (2).
9. The battery box electrical performance test temperature control method of claim 8, characterized in that:
the comparison result meets the condition that the temperature of the box body is higher than the upper limit value of the temperature in the box, and when the environmental temperature is lower than the lower limit value of the environmental temperature, the cooling fan is controlled to be started, and the heat-radiating opening (101) is closed by the heat-insulating plate (2);
and when the comparison result meets the condition that the box body temperature is lower than the lower limit value of the box body temperature and the environment temperature is higher than the upper limit value of the environment temperature, the cooling fan is controlled to be closed, and the heat-radiating opening (101) is opened by the heat-insulating plate (2).
10. The utility model provides a battery subrack electrical property test system, is located a working space, its characterized in that:
the system comprises the battery plug box electrical property testing tool set in the working space and used for testing the electrical property of the battery plug box, and testing equipment used for testing the electrical property of the battery plug box;
and a temperature adjusting device for adjusting the temperature in the working space is arranged in the working space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210314067.7A CN114779078A (en) | 2022-03-28 | 2022-03-28 | Battery plug box electrical performance testing tool, system and testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210314067.7A CN114779078A (en) | 2022-03-28 | 2022-03-28 | Battery plug box electrical performance testing tool, system and testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114779078A true CN114779078A (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210314067.7A Pending CN114779078A (en) | 2022-03-28 | 2022-03-28 | Battery plug box electrical performance testing tool, system and testing method |
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| Country | Link |
|---|---|
| CN (1) | CN114779078A (en) |
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2022
- 2022-03-28 CN CN202210314067.7A patent/CN114779078A/en active Pending
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