Battery swapping connector detection method, device, circuit, electronic equipment and storage medium

Abstract

Embodiments of the present application disclose a battery swap connector detection method, device, circuit, electronic equipment and storage medium. The battery swap connector detection method comprises: determining that the trunk current of the battery energy distribution unit accessed by each battery branch in the power equipment is greater than a preset current, and determining the detection result of the battery swap connector of each battery branch according to the branch current of each battery branch; wherein the preset current is determined according to the number of each battery branch. The battery swap connector detection method provided by the embodiments of the present application can improve the accuracy of abnormal detection of the battery swap connector.

Description

[0001] This divisional application is a divisional application of Chinese patent application No. 202310227255.0, filed on March 10, 2023, entitled "Method, Apparatus, Circuit, Electronic Device and Storage Medium for Testing Battery Swapping Connectors". Technical Field

[0002] This application relates to the field of battery technology, specifically to a method, apparatus, circuit, electronic device, and storage medium for testing battery swapping connectors. Background Technology

[0003] With the development of the new energy industry, more and more power equipment, such as electric vehicles, requires battery swapping. Currently, the battery swapping method for power equipment involves connecting a new battery to the power equipment's BDU (Battery Energy Distribution Unit) via a battery swapping connector. During the battery swapping process, inaccurate positioning may cause the battery swapping connector to unexpectedly crack, or the embedded metal sleeve of the connector may detach, preventing the battery from being properly connected. This could lead to overcurrent discharge of the battery and burn-out of the battery swapping connector. Therefore, it is necessary to inspect the battery swapping connector.

[0004] Current methods for testing battery swapping connectors utilize the characteristic that poor contact in the connector generates significant resistance. The test result is determined by checking if the voltage difference between the battery's internal voltage and the motor's DC bus voltage falls within a preset range. However, power equipment typically includes multiple battery branches. Using the above method to test the connector can lead to inaccurate measurements of the voltage in any given battery branch, resulting in misjudgments. Summary of the Invention

[0005] In view of the above problems, this application provides a method, apparatus, circuit, electronic device and storage medium for testing battery swapping connectors, which can improve the accuracy of abnormal detection of battery swapping connectors.

[0006] In a first aspect, embodiments of this application provide a method for detecting battery swapping connectors. The method includes: acquiring the current state of a power device; and detecting the battery swapping connectors of each battery branch according to a detection strategy corresponding to the current state. The current state includes a static state and an operating state. The detection strategy corresponding to the static state includes determining the detection result of the battery swapping connector of each battery branch based on the branch voltage of each battery branch in an independent operating state. The detection strategy for the operating state includes determining the detection result of the battery swapping connector of each battery branch based on the branch current of each battery branch.

[0007] In the technical solution of this application embodiment, a detection strategy corresponding to the current state of the power equipment is determined to detect the battery swapping connectors of each battery branch. When the power equipment is stationary, the battery swapping connectors are detected using the branch voltage of each battery branch operating independently. When the power equipment is running, the battery swapping connectors are detected using the branch current of each battery branch. This ensures that when the power equipment is stationary, the detection of the battery swapping connector of a particular battery branch is not affected by the voltage of other battery branches. Furthermore, when the power equipment is running, even if there is voltage variation between battery branches, it will not interfere with the detection of the battery swapping connectors. This improves the accuracy of abnormal detection of the battery swapping connectors and prevents over-discharge of the battery or connector burn-out.

[0008] In some embodiments, the battery swapping connectors of each battery branch are tested according to a detection strategy corresponding to the current state. This includes: determining that the current state is a static state; controlling each battery branch to operate independently in sequence; acquiring the branch voltage of each battery branch in its independent operating state; comparing the branch voltage of each battery branch with the main circuit voltage of the battery energy distribution unit to which each battery branch is connected; and determining the test result of the battery swapping connector for each battery branch. By controlling each battery branch to operate independently in sequence when the current state is determined to be static, and determining the test result of the battery swapping connector for each battery branch based on the comparison result of the branch voltage of each battery branch in its independent operating state with the main circuit voltage of the battery energy distribution unit, it is ensured that when the power equipment is static, only a single battery branch operates during each battery swapping connector test, thereby improving the accuracy of anomaly detection for the battery swapping connector.

[0009] In some embodiments, determining that the current state is a static state and controlling each battery branch to operate independently in sequence includes: determining that the current state of the power equipment is a static state, acquiring the switching state of each battery branch; determining that the switching state of each battery branch does not have a sticking fault, and controlling each battery branch to operate independently in sequence. By determining whether there is a sticking fault in each battery branch when the power equipment is in a static state, and then controlling each battery branch to operate independently in sequence when there is no sticking fault, the sticking fault is avoided from affecting the collected branch voltage, improving the effectiveness of the collected branch voltage, and further improving the accuracy of the detection results of the battery swapping connector.

[0010] In some embodiments, controlling the independent sequential operation of each battery branch includes: controlling the independent sequential operation of each battery branch according to the descending order of their internal battery voltages. By controlling the independent sequential operation of each battery branch according to the descending order of their internal battery voltages when the power equipment is stationary, it is not necessary to disconnect the last independently operating battery branch and re-perform the high-voltage power-on operation when performing high-voltage power-on operations on subsequent battery branches. This improves the convenience of subsequent high-voltage power-on operations and reduces the possibility of abnormalities that may occur during the high-voltage power-on process of the battery branches.

[0011] In some embodiments, comparing the branch voltage of each battery branch with the main circuit voltage of the battery energy distribution unit to which each battery branch is connected, to determine the test result of the battery swapping connector of each battery branch, includes: determining that the high-voltage sampling of the battery branch and the battery energy distribution unit is fault-free; comparing the branch voltage of the battery branch with the main circuit voltage of the battery energy distribution unit to which the battery branch is connected, to obtain the test result of the battery swapping connector of the battery branch. After determining that the high-voltage sampling of the battery branch and the battery energy distribution unit is normal, the branch voltage of the battery branch is then compared with the main circuit voltage of the battery energy distribution unit to which the battery branch is connected to obtain the test result of the battery swapping connector, so as to avoid inaccurate branch voltage and main circuit voltage due to abnormal high-voltage sampling, thereby further improving the accuracy of the test result of the battery swapping connector.

[0012] In some embodiments, detecting the battery swapping connector of each battery branch according to the detection strategy corresponding to the current state includes: determining that the current state of the power equipment is an operating state, and acquiring the branch current of each battery branch; determining the detection result of the battery swapping connector of the specified battery branch according to a first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and a second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit; wherein, the remaining battery branches are the battery branches other than the specified battery branch. By determining that the current state of the power equipment is the operating state, the test result of the battery swapping connector of the specified battery branch is determined based on the first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and the second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit. This allows the influence of other battery branches on the branch current of the battery branch to be considered when testing the battery swapping connector of a certain battery branch using current, thereby improving the accuracy of the test result of the battery swapping connector of the battery branch.

[0013] In some embodiments, determining the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and a second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit, includes: the main circuit current of the battery energy distribution unit is greater than a preset current; determining the detection result of the battery swapping connector of the specified battery branch based on the first comparison result of the branch current of any specified battery branch in each of the battery branches with the preset value, and the second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit, thereby further improving the accuracy of the detection result of the battery swapping connector.

[0014] In some embodiments, the preset current is determined based on the number of each of the battery branches, thereby further improving the accuracy of the preset current setting and thus improving the accuracy of the judgment result of the main circuit current.

[0015] In some embodiments, determining the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and a second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit, includes: determining that the battery swapping connector of the specified battery branch is abnormal when the first comparison result is that the absolute value of the branch current of the specified battery branch is less than the preset value, and the second comparison result is that the difference between the branch current of each remaining battery branch and the main circuit current of the battery energy distribution unit is within a preset range, thereby improving the accuracy of the detection result of the battery swapping connector and preventing problems such as over-discharge and over-current of normally connected batteries.

[0016] In some embodiments, determining the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and a second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit, includes: determining that the battery swapping connector of the specified battery branch is normal when the first comparison result is that the absolute value of the branch current of the specified battery branch is greater than or equal to the preset value, or when the second comparison result is that the difference between the branch current of each remaining battery branch and the main circuit current of the battery energy distribution unit is outside a preset range, thereby improving the accuracy of the detection result of the battery swapping connector and preventing problems such as over-discharge and over-current of normally connected batteries.

[0017] Secondly, this application provides a battery swapping connector testing device, comprising: a status acquisition module for acquiring the current status of a power equipment; and a fault detection module for testing the battery swapping connectors of each battery branch according to a detection strategy corresponding to the current status; wherein the current status includes a static state and an operating state; the detection strategy corresponding to the static state includes determining the testing result of the battery swapping connector of each battery branch based on the branch voltage of each battery branch in an independent operating state; and the detection strategy for the operating state includes determining the testing result of the battery swapping connector of each battery branch based on the branch current of each battery branch.

[0018] In the technical solution of this application embodiment, a detection strategy corresponding to the current state of the power equipment is determined to detect the battery swapping connectors of each battery branch. When the power equipment is stationary, the battery swapping connectors are detected using the branch voltage of each battery branch operating independently. When the power equipment is running, the battery swapping connectors are detected using the branch current of each battery branch. This ensures that when the power equipment is stationary, the detection of the battery swapping connector of a particular battery branch is not affected by the voltage of other battery branches. Furthermore, when the power equipment is running, even if there is voltage variation between battery branches, it will not interfere with the detection of the battery swapping connectors. This improves the accuracy of abnormal detection of the battery swapping connectors and prevents over-discharge of the battery or connector burn-out.

[0019] In some embodiments, the fault detection module is specifically used to: determine that the current state is a static state, control each of the battery branches to operate independently in sequence, obtain the branch voltage of each of the battery branches in the independent operation state; compare the branch voltage of each of the battery branches with the main circuit voltage of the battery energy distribution unit connected to each of the battery branches, and determine the detection result of the battery swapping connector of each of the battery branches.

[0020] In some embodiments, the fault detection module is specifically used to: determine that the current state of the power equipment is a stationary state, obtain the switching state of each of the battery branches; determine that there is no sticking fault in the switching state of each of the battery branches, and control each of the battery branches to operate independently in sequence.

[0021] In some embodiments, the fault detection module is specifically used to: control each battery branch to operate independently in sequence according to the order of the battery internal voltage from largest to smallest.

[0022] In some embodiments, the fault detection module is specifically used to: determine that the high-voltage sampling of the battery branch and the battery energy distribution unit is fault-free, compare the branch voltage of the battery branch with the main circuit voltage of the battery energy distribution unit connected to the battery branch, and obtain the detection result of the battery swapping connector of the battery branch.

[0023] In some embodiments, the fault detection module is specifically used to: determine that the current state of the power equipment is the operating state, and obtain the branch current of each of the battery branches; determine the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and a second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit; wherein, the remaining battery branches are the battery branches other than the specified battery branch.

[0024] In some embodiments, the fault detection module is specifically used to: determine the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each battery branch with the preset value, and a second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit, when the main circuit current of the battery energy distribution unit is greater than the preset current.

[0025] In some embodiments, the preset current is determined based on the number of each of the battery branches.

[0026] In some embodiments, the fault detection module is specifically used to: determine that the battery swapping connector of the specified battery branch is abnormal when the first comparison result is that the absolute value of the branch current of the specified battery branch is less than the preset value, and the second comparison result is that the difference between the branch current of each remaining battery branch and the main current of the battery energy distribution unit is within a preset range.

[0027] In some embodiments, the fault detection module is specifically used to: determine that the battery swapping connector of the specified battery branch is normal when the absolute value of the branch current of the specified battery branch is greater than or equal to the preset value in the first comparison result, or when the difference between the branch current of each remaining battery branch and the main current of the battery energy distribution unit is outside the preset range in the second comparison result.

[0028] Thirdly, this application provides an electronic device including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the method described in the first aspect of the embodiment.

[0029] Fourthly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, performs the method described in the first aspect of the embodiment.

[0030] Fifthly, this application provides a computer program product that, when run on a computer, causes the computer to perform the method described in the first aspect of the embodiment.

[0031] In a sixth aspect, this application provides a detection circuit, the detection circuit including a control unit, a battery energy distribution unit, and each battery branch; the battery branch is connected to the battery energy distribution unit through a battery swapping connector of the battery branch; the control unit is connected to the battery energy distribution unit and each of the battery branches; the control unit is used to execute the method in the first aspect embodiment to detect whether the battery swapping connector of any of the battery branches is abnormal.

[0032] In a seventh aspect, this application provides a power device, including the electronic equipment provided in the third aspect, or the detection circuit provided in the fifth aspect. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of a power device according to some embodiments of this application;

[0035] Figure 2 This is a topology diagram of the detection circuit in some embodiments of this application;

[0036] Figure 3 This is a first flowchart of a battery swapping connector testing method according to some embodiments of this application;

[0037] Figure 4 This is a second flowchart of a battery swapping connector detection method according to some embodiments of this application;

[0038] Figure 5 This is a third flowchart of a battery swapping connector testing method according to some embodiments of this application;

[0039] Figure 6 This is a fourth flowchart of a battery swapping connector testing method according to some embodiments of this application;

[0040] Figure 7This is a schematic diagram of the structure of a battery swapping connector testing device according to some embodiments of this application;

[0041] Figure 8 This is a schematic diagram of the structure of an electronic device according to some embodiments of this application.

[0042] The reference numerals in the detailed embodiments are as follows:

[0043] 10-Power equipment; 100-Battery pack; 200-Controller; 300-Motor; A1-Battery energy distribution unit; A2-Battery branch; 400-Battery swapping connector; B1-Main battery management unit; B2-Slave battery management unit; K-Controllable switch; V1-Branch voltage; C1-Branch current; V main - Main circuit voltage; C main - Main circuit current; 501 - Voltage acquisition module; 502 - Fault detection module; 60 - Electronic equipment; 601 - Processor; 602 - Memory; 603 - Communication bus. Detailed Implementation

[0044] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0049] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0051] With the development of the new energy industry, more and more power equipment requires battery swapping. Battery swapping refers to the technology of replacing the battery pack in power equipment. Currently, the battery swapping method for power equipment involves connecting a new battery to the power equipment's BDU (Battery Energy Distribution Unit) via a battery swapping connector. However, during the battery swapping process, inaccurate positioning may cause the battery swapping connector to unexpectedly crack, or the metal sleeve of the connector may detach, resulting in poor high-voltage contact of the battery and preventing proper connection to the BDU. If the battery pack completes the high-voltage power-on process in this situation, the main battery management unit in the BDU will send power to the vehicle according to the battery's allowable power, causing the normally high-voltage connected battery to experience overcurrent discharge, and potentially even connector burnout. Therefore, it is necessary to inspect the battery swapping connector.

[0052] Current methods for testing battery swapping connectors utilize the characteristic that poor contact in the connector generates significant resistance. The test result is determined by comparing the voltage difference between the battery's internal voltage and the motor's DC bus voltage within a preset range. However, power equipment typically includes multiple battery branches. Using this method to test the connector can lead to voltage fluctuations in a normally functioning battery branch due to abnormal voltage changes. This makes it impossible to accurately determine the internal voltage of that particular battery branch, resulting in misjudgments in the connector test.

[0053] To address the aforementioned technical problems, this application embodiment acquires the branch voltage of each battery branch in an independently operating state when the power equipment is stationary, and detects the battery swapping connector of that battery branch based on the branch voltage of the independently operating battery branch; when the power equipment is in operation, the battery swapping connector of that battery branch is detected based on the branch current of the battery branch. Therefore, when detecting the battery swapping connector, the influence of voltage from other battery branches can be avoided, improving the accuracy of anomaly detection for the battery swapping connector.

[0054] The battery swapping connector testing method, apparatus, circuit, electronic device, and storage medium disclosed in this application can be applied to power equipment that uses batteries as a power source, including but not limited to electrical devices used in vehicles, ships, or aircraft.

[0055] For ease of explanation, the following embodiments will be described using a vehicle 10 as an example of a power device according to an embodiment of this application.

[0056] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 10 provided in some embodiments of this application. The vehicle 10 can be a natural gas vehicle or a new energy vehicle; the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery pack 100 is disposed inside the vehicle 10, and the battery pack 100 can be located at the bottom, front, or rear of the vehicle 10. The battery pack 100 can be used to power the vehicle 10; for example, the battery pack 100 can serve as the operating power source for the vehicle 10. The vehicle 10 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery pack 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 10 during starting, navigation, and driving.

[0057] In some embodiments of this application, the battery pack 100 can not only serve as the operating power source for the vehicle 10, but also as the driving power source for the vehicle 10, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10.

[0058] It should be noted that in this application, the battery pack 100 serves as the driving power source for the vehicle 10, providing driving power to the vehicle 10.

[0059] A detection circuit is provided according to some embodiments of this application, such as Figure 2 As shown, the detection circuit includes a control unit (not shown), a battery energy distribution unit A1, and each battery branch A2. Each battery branch A2 is connected to the battery energy distribution unit A1 via a battery swapping connector 400. The control unit is connected to the battery energy distribution unit and each battery branch. The control unit can be... Figure 1The controller 200 shown, or other electronic devices used to control the battery energy distribution unit A1 and each battery branch A2.

[0060] In one possible implementation, battery branch A2 includes a battery and a controllable switch K. The battery in battery branch A2 is connected to the controllable switch K, and the controllable switch K is connected to the battery swapping connector 400 of battery branch A2. A control unit is connected to the controllable switch K of each battery branch A2 to control the opening and closing state of the controllable switch K of each battery branch A2.

[0061] In one possible implementation, the battery energy distribution unit A1 includes a main battery management unit B1 and a slave battery management unit B2. The battery management unit is an electronic device capable of monitoring and managing the battery. It collects and calculates parameters such as voltage, current, temperature, and SOC, and then controls the charging and discharging process to protect the battery and improve its overall performance. The main battery management unit B1 monitors and manages the batteries in all battery branches, while the slave battery management unit B2 monitors and manages the batteries in its respective battery branch. A control unit can be connected to both the main battery management unit B1 and the slave battery management unit B2 to perform current and voltage sampling on both the main battery management unit B1 and each battery branch A2.

[0062] The control unit is used to detect the current state of the power equipment. The current state of the power equipment may be either stationary or operational. If the current state of the power equipment is detected as stationary, the detection result of the battery swapping connector for each battery branch can be determined based on the branch voltage of each battery branch A2 in independent operation mode. Independent operation mode means that the controllable switch K of one battery branch A2 is closed, while the controllable switches K of other battery branches A2 are open; in this case, the battery branch with closed controllable switch K is in an independent operation mode.

[0063] According to some embodiments of this application, this application provides a method for detecting battery swapping connectors. This method can be applied to the aforementioned control unit to implement battery swapping connector detection. Figure 3 As shown, the battery swapping connector testing method includes:

[0064] S101, Obtain the current status of the power equipment;

[0065] S102, according to the detection strategy corresponding to the current state, the battery swapping connectors of each battery branch are detected;

[0066] The current state includes both the static state and the running state;

[0067] The detection strategy for the static state includes determining the detection results of the battery swapping connector of each battery branch based on the branch voltage of each battery branch in independent operation.

[0068] The operational status detection strategy includes determining the detection results of the battery swapping connectors for each battery branch based on the branch current of each battery branch.

[0069] In some embodiments, the static state refers to the stopped state when the power equipment is not in operation. Taking a vehicle as an example, the static state means that the vehicle body is not powered, the engine or motor is not working, and the electrical appliances are not running, indicating a parked state. The operating state refers to the state when the power equipment is working. Taking a vehicle as an example, the operating state means that the vehicle body is powered, the engine or motor is working, or the vehicle is in motion.

[0070] When the current state of the power equipment is detected as stationary, it means that the battery branches of the power equipment are not working. At this time, controlling each battery branch will not affect the normal operation of the power equipment. Therefore, each battery branch can be put into independent operation in sequence to obtain the branch voltage of each battery branch in independent operation.

[0071] In some embodiments, the independent operation state of a battery branch refers to the situation where only one battery branch is operating at a time, while the other battery branches are disconnected, thereby obtaining the branch voltage of a single battery branch in the independent operation state. For example, with Figure 2 For example, if the current state of the power equipment is determined to be stationary, the branch voltage of the first battery branch A2 can be obtained when the controllable switch K of the first battery branch A2 is closed and the controllable switches K of the other battery branches A2 are open. Similarly, the branch voltages of the other battery branches A2 in independent operating states can be collected.

[0072] Since other battery branches are disconnected when the branch voltage of a certain battery branch is collected, the collected branch voltage will not be affected by the voltage of other battery branches. At this time, the battery branch's battery swapping connector can be tested based on the branch voltage of that battery branch to determine whether the battery swapping connector of that battery branch is abnormal.

[0073] In some embodiments, when the current state of the power equipment is detected as "operating," it indicates that each battery branch of the power equipment may need to work, and it is impossible to control each battery branch to work independently in sequence. Therefore, the branch voltage of one battery branch may be affected by the branch voltage of other battery branches. Therefore, when the current state of the power equipment is detected as "operating," the branch current of the battery branch is acquired, and based on the branch current, it is determined whether the battery branch's battery swapping connector is abnormal. For example, if the branch current of the battery branch is greater than a certain threshold when the current state of the power equipment is "operating," it can be determined that the battery branch's battery swapping connector is abnormal; otherwise, it is determined that the battery branch's battery swapping connector is normal.

[0074] The aforementioned battery swapping connector testing method determines the corresponding testing strategy for each battery branch based on the current state of the power equipment. When the power equipment is stationary, the connector is tested using the branch voltage of each battery branch operating independently. When the power equipment is running, the connector is tested using the branch current of each battery branch. This ensures that when the power equipment is stationary, the testing of a particular battery branch's connector is not affected by the voltage of other battery branches. Furthermore, even if voltage differences exist between battery branches when the power equipment is running, they will not interfere with the connector testing. This improves the accuracy of abnormal connector detection and prevents battery over-discharge or connector burn-out.

[0075] In some embodiments, to further improve the accuracy of the test results for the battery swapping connector, such as... Figure 4 As shown, based on the detection strategy corresponding to the current state, the battery swapping connectors of each battery branch are tested, including:

[0076] S201, determine that the current state is a static state, control each battery branch to operate independently in sequence, and obtain the branch voltage of each battery branch in the independent operation state;

[0077] S202, compare the branch voltage of each battery branch with the main circuit voltage of the battery energy distribution unit connected to each battery branch to determine the test result of the battery swapping connector of each battery branch.

[0078] Specifically, controlling the independent operation of each battery branch sequentially means controlling only one battery branch at a time, while disconnecting the others, thereby obtaining the branch voltage of a single battery branch in its independent operation state. For example, using... Figure 2For example, if the current state of the power equipment is determined to be stationary, first control the controllable switch K of the first battery branch A2 to close, and open the controllable switches K of the other battery branches A2. Battery branches A2 with closed controllable switches K are now in operation, and the branch voltage of the first battery branch A2 with closed controllable switches K can be collected at this time. After collecting the branch voltage of this battery branch A2, control the controllable switch K of the second battery branch A2 to close, and open the controllable switches K of the other battery branches A2, to collect the branch voltage of the second battery branch A2 with closed controllable switches K. This process is repeated to collect the branch voltage of all battery branches A2 in independent operation.

[0079] After collecting the voltage of a specific battery branch, this branch voltage can be compared with the main circuit voltage of the battery energy distribution unit to determine whether the battery branch's battery swapping connector is malfunctioning based on the difference between the two. For example, using... Figure 2 For example, after acquiring the branch voltage V1 of a certain battery branch A2, it is compared with the main circuit voltage V obtained by sampling the voltage inside the main circuit relay in the battery energy distribution unit A1. main Perform a comparison. If V main If -V1 < ΔV, then the battery swapping connector 400 of battery branch A2 is considered normal; otherwise, the battery swapping connector 400 of battery branch A2 is considered abnormal. Here, ΔV is a preset voltage, which can be set based on extensive experimental data or theoretical schemes.

[0080] By controlling each battery branch to operate independently in sequence when the current state is determined to be static, the detection result of the battery swapping connector of each battery branch is determined based on the comparison result of the branch voltage of each battery branch in the independent operation state with the main circuit voltage of the battery energy distribution unit. This ensures that only a single battery branch operates for each battery swapping connector detection when the power equipment is static, thereby improving the accuracy of abnormal detection of the battery swapping connector.

[0081] In some embodiments, to further improve the accuracy of the test results for the battery swapping connector, such as... Figure 5 As shown, the current state of the power equipment is determined to be stationary, and each battery branch is controlled to operate independently in sequence, including:

[0082] S301, Determine that the current state of the power equipment is stationary, and obtain the switching status of each battery branch;

[0083] S302, confirm that there is no sticking fault in the switch status of each battery branch, and control each battery branch to operate independently in sequence.

[0084] In some embodiments, since the voltage of a certain battery branch may be affected by other battery branches, when the current state of the power equipment is determined to be stationary, the controllable switches of each battery branch, such as relays, can be controlled to open first. Then, the open / closed state of the controllable switches of each battery branch is detected. If all controllable switches of the battery branches are open and there is no sticking fault, the possibility that the subsequently obtained branch voltage will be affected by battery branch sticking can be ruled out.

[0085] If any controllable switch in any battery branch has a sticking fault, an alarm message indicating the sticking fault will be generated. The branch voltage will only be collected after the sticking fault is cleared. Sticking faults in battery branches can be detected using methods such as high-voltage diagnostics.

[0086] By determining whether there is adhesion fault in each battery branch when the power equipment is stationary, and then controlling each battery branch to operate independently in sequence when there is no adhesion fault, the adhesion fault can be avoided from affecting the collected branch voltage, thereby improving the effectiveness of the collected branch voltage and further improving the accuracy of the test results of the battery swapping connector.

[0087] Considering that when the power equipment is stationary, after testing all battery swapping connectors and finding them all functioning correctly, all battery branches need to be energized with high voltage for subsequent use. However, due to the influence of actual operating conditions, the battery losses in each battery branch differ, resulting in inconsistent internal voltages. Therefore, when energizing all battery branches with high voltage, each branch needs to close sequentially from low to high voltage. Thus, to reduce abnormalities during the subsequent high-voltage energization process and facilitate subsequent high-voltage energization operations, in some embodiments, each battery branch is controlled to operate independently and sequentially, including:

[0088] Based on the order of battery voltage from largest to smallest in each battery branch, control each battery branch to operate independently in sequence.

[0089] Among them, the battery internal voltage of a certain battery branch can be the historical branch voltage collected at a historical time when the battery branch is operating independently.

[0090] As one possible implementation method, such as Figure 2As shown, each battery branch includes two battery branches A2. The control unit can collect and compare the internal voltage of the batteries in each battery branch A2 through the slave battery management unit B2. If the internal voltage of the first battery branch A2 is greater than that of the second battery branch A2, the controllable switch K of the first battery branch A2 is first closed, and the controllable switch K of the second battery branch A2 is opened to obtain the branch voltage of the first battery branch A2 and test the battery swapping connector 400 of that battery branch. After the branch voltage of the first battery branch A2 is tested, the controllable switch K of the second battery branch A2 is closed, and the controllable switch K of the first battery branch A2 is opened to obtain the branch voltage of the second battery branch A2 and test the battery swapping connector 400 of that battery branch. If the battery swapping connectors of both battery branches are normal after testing, the first battery branch A2 can be directly closed to complete the high-voltage power-on operation without disconnecting the second battery branch A2.

[0091] By controlling each battery branch to operate independently in sequence according to the order of the battery voltage from largest to smallest when the power equipment is stationary, it is possible to make each battery branch operate independently without disconnecting the last independently operating battery branch and then restarting the high-voltage power-on operation. This improves the convenience of subsequent high-voltage power-on operations and reduces the possibility of abnormalities that may occur during the high-voltage power-on process of the battery branches.

[0092] In some embodiments, to further improve the accuracy of the detection results, the branch voltage of each battery branch is compared with the main circuit voltage of the battery energy distribution unit to which each battery branch is connected, to determine the detection result of the battery swapping connector of each battery branch, including:

[0093] After confirming that the high-voltage sampling of the battery branch and the battery energy distribution unit is fault-free, the branch voltage of the battery branch is compared with the main circuit voltage of the battery energy distribution unit connected to the battery branch to obtain the test result of the battery branch's battery swapping connector.

[0094] Before comparing the branch voltage of the battery branch with the main circuit voltage of the battery energy distribution unit, high-voltage sampling detection can be performed on each battery branch and the battery energy distribution unit to determine if the high-voltage sampling is normal. If the high-voltage sampling of each battery branch and the battery energy distribution unit is normal, it means that a normal voltage can be collected, and at this time, the branch voltage of the battery branch can be collected. High-voltage sampling detection can be used to determine if the high-voltage sampling is normal by obtaining fault codes. For example, if no fault code is received during high-voltage sampling, it can be determined that the high-voltage sampling is normal. Alternatively, the high-voltage sampling can also be determined to be normal by checking whether the sampling results are within a preset range.

[0095] After confirming that the high-voltage sampling of the battery branch and the battery energy distribution unit is normal, the branch voltage of the battery branch is compared with the main circuit voltage of the battery energy distribution unit connected to the battery branch to obtain the test results of the battery swapping connector. This is to avoid inaccurate branch voltage and main circuit voltage due to abnormal high-voltage sampling, thereby further improving the accuracy of the test results of the battery swapping connector.

[0096] In some embodiments, such as Figure 6 As shown, based on the detection strategy corresponding to the current state, the battery swapping connectors of each battery branch are tested, including:

[0097] S401, determine the current state of the power equipment as the operating state, and obtain the branch current of each battery branch;

[0098] S402, based on the first comparison result of the branch current of any designated battery branch in each battery branch with the preset value, and the second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit, determine the detection result of the battery swapping connector of the designated battery branch.

[0099] The remaining battery branches are those other than the designated battery branches.

[0100] In some embodiments, when the current state of the power equipment is detected as being in operation, since each battery branch may need to participate in the operation, controlling each battery branch to operate independently in sequence would affect the operating state of the power equipment, making it impossible to obtain the branch voltage by controlling each battery branch to operate independently in sequence. Furthermore, the branch voltage of a certain battery branch collected at this time may be affected by the branch voltages of other battery branches, leading to inaccurate detection results of the battery swapping connector. Therefore, to improve the accuracy of the detection results of the battery swapping connector, when the power equipment is in operation, it is possible to first detect whether each battery branch and the battery energy distribution unit have completed high-voltage power-on. For example, with... Figure 2 For example, check whether the controllable switches K of the battery energy distribution unit A1 and each battery branch A2 are closed. If the controllable switches K are all closed, it means that each battery branch and the battery energy distribution unit have completed high voltage power-on.

[0101] After confirming that each battery branch and battery energy distribution unit has been powered on at high voltage, it is also possible to check whether there is an open circuit fault in each battery branch. This is to avoid affecting the accuracy of subsequent test results due to an open circuit fault in a certain battery branch. At the same time, it can also prevent the normal operation of the power equipment from being affected by an open circuit fault in a certain battery branch.

[0102] After confirming that there are no open-circuit faults in each battery branch, the branch current of each battery branch can be collected through the slave battery management unit. Once the branch current of a particular battery branch is collected, that battery branch can be designated as a specific battery branch, and its branch current is compared with a preset current value to obtain a first comparison result. Simultaneously, the other battery branches are designated as remaining battery branches, and the main circuit current of each remaining battery branch is compared with that of the battery energy distribution unit to obtain a second comparison result. Based on the first and second comparison results, it can be determined whether the battery swapping connector of that battery branch is abnormal. For example, using... Figure 2 For example, after collecting the branch current C1 of a specified battery branch A2, it is compared with a preset value C', such as 5A, and the comparison result is taken as the first comparison result. Simultaneously, the branch current C1 of the remaining battery branch A2 is compared with the main circuit current C of the battery energy distribution unit A1. main A comparison is performed, and the comparison result of the two is used as the second comparison result.

[0103] After obtaining the first comparison result and the second comparison result, the test result of the battery swapping connector of the specified battery branch can be determined based on the first comparison result and the second comparison result. If the first comparison result shows that the branch current of the specified battery branch is less than the preset value, and the second comparison result shows that the branch current of each remaining battery branch is less than the main circuit current, then the battery swapping connector of the specified battery branch is determined to be abnormal; otherwise, the battery swapping connector of the specified battery branch is determined to be normal.

[0104] By determining that the current state of the power equipment is the operating state, the test result of the battery swapping connector of the specified battery branch is determined based on the first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and the second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit. This allows the influence of other battery branches on the branch current of the battery branch to be considered when testing the battery swapping connector of a certain battery branch using current, thereby improving the accuracy of the test result of the battery swapping connector of the battery branch.

[0105] In some embodiments, to further improve the accuracy of the test results of the battery swapping connector, the test result of the battery swapping connector of the specified battery branch is determined based on a first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and a second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit, including:

[0106] If the main circuit current of the battery energy distribution unit is greater than the preset current, the test result of the battery swapping connector of the specified battery branch is determined based on the first comparison result of the branch current of any specified battery branch in each battery branch with the preset value, and the second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit.

[0107] Considering that the detection error is large when the current in several circuits is low, the required detection effect cannot be achieved. Furthermore, low current in several circuits indicates that the current in each branch circuit is also low, and low current has limited impact on battery over-discharge and connectors. Therefore, assuming the current state of the power equipment is determined to be operational, the main circuit current C can be detected first. main Is it greater than the preset current σ*N? Considering the possibility of recharging between battery branches, it can be determined whether |C main Is the current greater than the preset current σ*N? (Several current channels |C) main If the current is greater than the preset current σ*N, it means that the current detection requirement has been met and the detected current error is small. At this time, the branch current of the specified battery branch can be obtained and compared with the preset value to determine the first comparison result; and the branch current of each remaining battery branch can be obtained and compared with the main circuit current of the battery energy distribution unit to determine the second comparison result.

[0108] σ can be determined based on actual conditions, such as by using current sampling accuracy and threshold tolerance data collected from a large amount of experimental data. For example, a pre-defined correspondence between different current sampling accuracies and threshold tolerances and various values ​​of σ can be established. After determining a certain current sampling accuracy and threshold tolerance, the value of σ corresponding to that current sampling accuracy and threshold tolerance can be obtained based on this correspondence. The value of σ can be a positive integer, such as σ = 10. N is a preset parameter.

[0109] To further improve the accuracy of the preset current setting and thus the accuracy of the judgment result of the main circuit current, in some embodiments, the preset current can be determined according to the number of each battery branch. For example, N can be the number of each battery branch.

[0110] In some embodiments, the detection result of the battery swapping connector of a specified battery branch is determined based on a first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and a second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit, including:

[0111] If the absolute value of the branch current of the specified battery branch is less than a preset value in the first comparison result, and the difference between the branch current of each remaining battery branch and the main current of the battery energy distribution unit is within a preset range in the second comparison result, it is determined that the battery swapping connector of the specified battery branch is abnormal.

[0112] In some embodiments, considering the recharge mechanism between battery branches, after obtaining the branch current of each battery branch, the absolute value |C1| of the branch current of a specified battery branch can be compared with a preset value of the current. Simultaneously, the branch current C1 of the remaining battery branches is compared with the main circuit current C of the battery energy distribution unit. main A comparison is performed. If the absolute value of the branch current |C1| of a specified battery branch is less than the preset current value, such as 5A, and the branch current C1 of each remaining battery branch is less than the main circuit current C of the battery energy distribution unit, then the comparison is performed. main If the difference is within a preset range, then the battery swapping connector of the specified battery branch is determined to be faulty. The preset range can be determined based on the actual situation. The preset range can be an open range or a closed range, such as (-0.5A, +0.5A) or [-0.5A, +0.5A]. It is understood that if the preset range is an open range, then the two endpoints of the open range are not included.

[0113] In some embodiments, the detection result of the battery swapping connector of a specified battery branch is determined based on a first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and a second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit, including:

[0114] If the absolute value of the branch current of the specified battery branch is greater than or equal to a preset value in the first comparison result, or if the difference between the branch current of each remaining battery branch and the main current of the battery energy distribution unit is outside the preset range in the second comparison result, the battery swapping connector of the specified battery branch is determined to be normal.

[0115] In some embodiments, if the absolute value of the branch current of a specified battery branch, |C1|, is not less than a preset current value, such as 5A, and the branch current C1 of each remaining battery branch is equal to the main circuit current C of the battery energy distribution unit, then... main If the difference is outside the preset range, it can be determined that the battery swapping connector of the specified battery branch is normal.

[0116] If the absolute value of the branch current of the specified battery branch is less than a preset value in the first comparison result, and the difference between the branch current of each remaining battery branch and the main circuit current of the battery energy distribution unit is within a preset range in the second comparison result, it is determined that the battery swapping connector of the specified battery branch is abnormal. This allows for more accurate detection of whether the battery swapping connector of the specified battery branch is abnormal through the current verification method, thereby further improving the accuracy of the detection results of the battery swapping connector and preventing problems such as over-discharge and over-current of normally connected batteries.

[0117] Figure 7 The diagram shows a schematic structural block diagram of a battery swapping connector testing device according to an embodiment of this application. It should be understood that this device is related to... Figures 3 to 6 The method embodiments implemented in this paper correspond to the steps involved in the aforementioned method. The specific functions of this device can be found in the description above; to avoid repetition, detailed descriptions are omitted here. This device includes at least one software function module that can be stored in a memory or embedded in the device's operating system (OS) in the form of software or firmware. Specifically, the device includes: a status acquisition module 501, used to acquire the current status of the power equipment; and a fault detection module 502, used to detect the battery swapping connectors of each battery branch according to a detection strategy corresponding to the current status. The current status includes a static state and an operating state. The detection strategy corresponding to the static state includes determining the detection result of the battery swapping connector of each battery branch based on the branch voltage of each battery branch in an independent operating state. The detection strategy for the operating state includes determining the detection result of the battery swapping connector of each battery branch based on the branch current of each battery branch.

[0118] In the technical solution of this application embodiment, a detection strategy corresponding to the current state of the power equipment is determined to detect the battery swapping connectors of each battery branch. When the power equipment is stationary, the battery swapping connectors are detected using the branch voltage of each battery branch operating independently. When the power equipment is running, the battery swapping connectors are detected using the branch current of each battery branch. This ensures that when the power equipment is stationary, the detection of the battery swapping connector of a particular battery branch is not affected by the voltage of other battery branches. Furthermore, when the power equipment is running, even if there is voltage variation between battery branches, it will not interfere with the detection of the battery swapping connectors. This improves the accuracy of abnormal detection of the battery swapping connectors and prevents over-discharge of the battery or connector burn-out.

[0119] According to some embodiments of this application, the fault detection module 502 is specifically used to: determine that the current state is a static state, control each battery branch to operate independently in sequence, obtain the branch voltage of each battery branch in the independent operation state; compare the branch voltage of each battery branch with the main circuit voltage of the battery energy distribution unit connected to each battery branch, and determine the detection result of the battery swapping connector of each battery branch.

[0120] According to some embodiments of this application, the fault detection module 502 is specifically used to: determine that the current state of the power equipment is a stationary state, obtain the switching state of each battery branch; determine that there is no sticking fault in the switching state of each battery branch, and control each battery branch to operate independently in sequence.

[0121] According to some embodiments of this application, the fault detection module 502 is specifically used to: control each battery branch to operate independently in sequence according to the order of the battery internal voltage from large to small.

[0122] According to some embodiments of this application, the fault detection module 502 is specifically used to: determine that the high-voltage sampling of the battery branch and the battery energy distribution unit is fault-free, compare the branch voltage of the battery branch with the main circuit voltage of the battery energy distribution unit connected to the battery branch, and obtain the detection result of the battery branch's battery swapping connector.

[0123] According to some embodiments of this application, the fault detection module 502 is specifically used to: determine that the current state of the power equipment is the operating state, and obtain the branch current of each battery branch; determine the detection result of the battery swapping connector of the specified battery branch based on the first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and the second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit; wherein, the remaining battery branches are battery branches other than the specified battery branches.

[0124] According to some embodiments of this application, the fault detection module 502 is specifically used to: determine the detection result of the battery swapping connector of the specified battery branch based on the first comparison result of the branch current of any specified battery branch in each battery branch with the preset value, and the second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit.

[0125] According to some embodiments of this application, the preset current is determined based on the number of each battery branch.

[0126] According to some embodiments of this application, the fault detection module 502 is specifically used to: determine that the battery swapping connector of the specified battery branch is abnormal when the absolute value of the branch current of the specified battery branch is less than a preset value in the first comparison result and the difference between the branch current of each remaining battery branch and the main current of the battery energy distribution unit is within a preset range in the second comparison result.

[0127] According to some embodiments of this application, the fault detection module 502 is specifically used to: determine that the battery swapping connector of the specified battery branch is normal when the absolute value of the branch current of the specified battery branch is greater than or equal to a preset value in the first comparison result, or when the difference between the branch current of each remaining battery branch and the main current of the battery energy distribution unit is outside a preset range in the second comparison result.

[0128] According to some embodiments of this application, such as Figure 8 As shown, this application embodiment provides an electronic device 60, including: a processor 601 and a memory 602. The processor 601 and the memory 602 are interconnected and communicate with each other through a communication bus 603 and / or other forms of connection mechanism (not shown). The memory 602 stores a computer program executable by the processor 601. When the computing device is running, the processor 601 executes the computer program to perform a method executed by an external terminal in any optional implementation, such as: performing edge extraction on an input image to obtain an edge image of the input image; identifying the boundary of the battery electrode in the edge image; extracting the electrode image of the battery electrode from the input image based on the boundary; and inputting the electrode image into a pre-trained neural network model to obtain the detection result of the battery swapping connector.

[0129] This application provides a computer-readable storage medium storing a computer program that, when executed by a processor, performs the method in any of the aforementioned optional implementations.

[0130] The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0131] This application provides a computer program product that, when run on a computer, causes the computer to perform a method in any of the optional implementations.

[0132] This application provides a power device that includes electronic equipment or detection circuits as described in the above embodiments.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for testing battery swapping connectors, characterized in that, The method includes: In the power equipment, it is determined that the main circuit current of the battery energy distribution unit connected to each battery branch is greater than the preset current. Based on the branch current of each battery branch, the test result of the battery swapping connector of each battery branch is determined. The preset current is determined based on the number of each battery branch, and the preset current is equal to... N represents the number of each battery branch. The tolerance was determined based on the sampling accuracy and threshold of the acquired current. The step of determining the test result of the battery swapping connector for each battery branch based on the branch current of each battery branch includes: The detection result of the battery swapping connector of the specified battery branch is determined based on the first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and the second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit connected to each of the battery branches. The remaining battery branch refers to the battery branch other than the designated battery branch.

2. The method according to claim 1, characterized in that, In the determined power equipment, if the main circuit current of the battery energy distribution unit connected to each battery branch is greater than the preset current, the test results of the battery swapping connector of each battery branch are determined based on the branch current of each battery branch, including: When the power equipment is in operation, it is determined that the main circuit current of the battery energy distribution unit connected to each battery branch in the power equipment is greater than the preset current. Based on the branch current of each battery branch, the test result of the battery swapping connector of each battery branch is determined.

3. The method according to claim 1, characterized in that, The step of determining the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and a second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit connected to each battery branch, includes: It is determined that there is no open circuit fault in each of the battery branches. Based on the first comparison result of the branch current of any designated battery branch in each of the battery branches with a preset value, and the second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit connected to each battery branch, the detection result of the battery swapping connector of the designated battery branch is determined.

4. The method according to claim 1, characterized in that, The step of determining the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and a second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit connected to each battery branch, includes: If the absolute value of the branch current of the specified battery branch is less than the preset value in the first comparison result, and the difference between the branch current of each remaining battery branch and the main circuit current of the battery energy distribution unit connected to each battery branch is within a preset range in the second comparison result, it is determined that the battery swapping connector of the specified battery branch is abnormal.

5. The method according to claim 1, characterized in that, The step of determining the detection result of the battery swapping connector of the specified battery branch based on a first comparison result of the branch current of any specified battery branch in each of the battery branches with a preset value, and a second comparison result of the branch current of each remaining battery branch in each of the battery branches with the main circuit current of the battery energy distribution unit connected to each battery branch, includes: If the absolute value of the branch current of the specified battery branch is greater than or equal to the preset value in the first comparison result, or if the difference between the branch current of each remaining battery branch and the main circuit current of the battery energy distribution unit connected to each battery branch is outside the preset range in the second comparison result, then the battery swapping connector of the specified battery branch is determined to be normal.

6. A battery swapping connector testing device, characterized in that, The device includes: The fault detection module is used to determine that the main circuit current of the battery energy distribution unit connected to each battery branch in the power equipment is greater than the preset current, and to determine the detection result of the battery swapping connector of each battery branch based on the branch current of each battery branch. The preset current is determined based on the number of each battery branch, and the preset current is equal to... N represents the number of each battery branch. The tolerance was determined based on the sampling accuracy and threshold of the acquired current. The fault detection module is specifically used to determine the detection result of the battery swapping connector of the specified battery branch based on the first comparison result of the branch current of any specified battery branch in each battery branch with a preset value, and the second comparison result of the branch current of each remaining battery branch in each battery branch with the main circuit current of the battery energy distribution unit connected to each battery branch. The remaining battery branch refers to the battery branch other than the designated battery branch.

7. An electronic device comprising a processor and a memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 1 to 5.

9. A detection circuit, characterized in that, The detection circuit includes a control unit, a battery energy distribution unit, and each battery branch. The battery branch is connected to the battery energy distribution unit via the battery branch's battery swapping connector; The control unit is connected to the battery energy distribution unit and each of the battery branches; The control unit is used to execute the battery swapping connector detection method according to any one of claims 1-5 to detect whether the battery swapping connector of any of the battery branches is abnormal.

10. A power equipment, characterized in that, Includes the electronic device as described in claim 7 or the detection circuit as described in claim 9.

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