A copper busbar connection status detection method, device and computer storage medium

Abstract

The embodiments of the present application provide a method, device and computer storage medium for detecting the connection status of a copper bar. Among them, the voltage of the copper bar used to connect the battery module is detected; based on the correspondence between the voltage of the average current copper bar and the average current of the copper bar, the target resistance of the copper bar is calculated through the voltage of the copper bar and the pre-calculated average current of the copper bar; according to the target resistance of the copper bar, the connection status of the copper bar is determined. In this embodiment, the connection status of the copper bar is determined by the resistance of the copper bar, so that it is possible to identify in advance whether the copper bar is loose to ensure the performance of the battery pack.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of power supply technology, and in particular to a method and device for detecting the connection status of a copper busbar, and a computer storage medium. Background Art

[0002] With the rapid development of new energy vehicles in recent years, power battery packs, as the most important power output in vehicles, need to have very high reliability to ensure the stable operation of the vehicle.

[0003] At present, the power battery pack includes multiple battery modules, and the multiple battery modules are electrically connected by tightening copper busbars with bolts. When the battery pack is assembled, the bolts will be tightened according to the predetermined torque. However, due to the complex operating conditions of the vehicle in the later stage, the bolts may become loose, thereby loosening the copper busbar connection.

[0004] Therefore, it is necessary to monitor the connection status of the copper busbar at all times so that corresponding measures can be taken in time when the copper busbar connection becomes loose. Summary of the invention

[0005] The embodiments of the present application provide a copper busbar connection status detection method, device and computer storage medium, which determine the connection status of the copper busbar by the copper busbar resistance, so as to identify in advance whether the copper busbar is loose, so as to ensure the performance of the battery pack.

[0006] In a first aspect, an embodiment of the present application provides a method for detecting a copper busbar connection status, comprising:

[0007] Detect the voltage of the copper busbar used to connect the battery module;

[0008] Calculating the target resistance of the copper busbar by using the voltage of the copper busbar and the pre-calculated average current of the copper busbar;

[0009] The connection state of the copper bus is determined according to the magnitude relationship between the target resistance of the copper bus and the preset resistance value.

[0010] Optionally, determining the connection state of the copper bus according to the target resistance of the copper bus includes:

[0011] If the target resistance of the copper busbar is less than or equal to the preset resistance value, it is determined that the connection state of the copper busbar is normal;

[0012] If the target resistance of the copper busbar is greater than the preset resistance value, it is determined that the connection state of the copper busbar is abnormal.

[0013] Optionally, the pre-calculated average current of the copper busbar includes:

[0014] At the vehicle charging terminal and / or when the vehicle is powered on for the first time, the current of the copper busbar within a preset time range is collected multiple times, and the average current is calculated.

[0015] Optionally, detecting the voltage of a copper busbar used to connect the battery module includes:

[0016] The battery sampling chip can detect the voltage of the copper busbar used to connect the battery module in real time at the end of vehicle charging and / or when the vehicle is powered on for the first time.

[0017] Optionally, the corresponding relationship between the voltage of the average current copper bar and the average current of the copper bar is calculated based on the voltage of the copper bar and the pre-calculated average current of the copper bar to calculate the target resistance of the copper bar, including:

[0018] Based on the correspondence between the voltage of the average current copper bar and the average current of the copper bar, a first resistance is calculated according to the voltage of the copper bar detected at the vehicle charging terminal and the average current of the copper bar calculated at the vehicle charging terminal, and the first resistance is used as the target resistance of the copper bar; or,

[0019] Based on the correspondence between the voltage of the average current copper busbar and the average current of the copper busbar, the second resistance is calculated according to the voltage of the copper busbar detected when the vehicle is first powered on, and the average current of the copper busbar calculated when the vehicle is first powered on, and the second resistance is used as the target resistance of the copper busbar.

[0020] Optionally, the method further includes: calculating a target resistance of the copper busbar based on a first resistance calculated at the charging terminal of the vehicle and a second resistance calculated when the vehicle is powered on for the first time.

[0021] Optionally, calculating the target resistance of the copper busbar based on the voltage passing through the copper busbar and a pre-calculated average current of the copper busbar comprises:

[0022] Based on the corresponding relationship between the voltage of the average current copper bar and the average current of the copper bar, the voltage of the copper bar is divided by the pre-calculated average current of the copper bar to calculate the target resistance of the copper bar.

[0023] In a second aspect, an embodiment of the present application provides a copper busbar connection status detection device, comprising:

[0024] A detection module, used to detect the voltage of the copper busbar used to connect the battery module;

[0025] A calculation module, used for calculating the target resistance of the copper busbar by using the voltage of the copper busbar and the pre-calculated average current of the copper busbar;

[0026] The determination module is used to determine the connection state of the copper bus according to the target resistance of the copper bus.

[0027] In a third aspect, an embodiment of the present application provides an electronic device, comprising a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are used to be called and executed by the processing component to implement the copper busbar connection status detection method as described in the first aspect above.

[0028] In a fourth aspect, an embodiment of the present application provides a computer storage medium storing a computer program. When the computer program is executed by a computer, the copper busbar connection status detection method as described in the first aspect above is implemented.

[0029] In a fifth aspect, an embodiment of the present application provides a vehicle battery, comprising the electronic device described in the third aspect above.

[0030] In a sixth aspect, an embodiment of the present application provides a vehicle, comprising the vehicle battery described in the fifth aspect above.

[0031] In the embodiment provided by the present application, the voltage of the copper bar used to connect the battery module is detected; the target resistance of the copper bar is calculated by the voltage of the copper bar and the pre-calculated average current of the copper bar; according to the relationship between the target resistance of the copper bar and the preset resistance value, it is determined whether the connection state of the copper bar is abnormal, so that it can be identified in advance whether the copper bar is loose to ensure the performance of the battery pack.

[0032] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A flow chart of a copper busbar connection status detection method provided in an embodiment of the present application;

[0035] Figure 2 A flow chart of another copper busbar connection status detection method provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of the structure of a copper busbar connection status detection device provided in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0039] In some of the processes described in the specification and claims of this application and the above-mentioned figures, multiple operations that appear in a specific order are included, but it should be clearly understood that these operations may not be executed in the order in which they appear in this article or executed in parallel. The serial numbers of the operations, such as 101, 102, etc., are only used to distinguish between different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions of "first", "second", etc. in this article are used to distinguish different messages, devices, modules, etc., do not represent the order of precedence, and do not limit the "first" and "second" to be different types.

[0040] Before introducing a method for establishing a temperature rise prediction model and a corresponding temperature rise prediction method provided in this application, a brief introduction to the relevant concepts and research background involved in this application is first given:

[0041] (1) Related concepts:

[0042] Copper busbar: It is a conductor made of copper with a rectangular or chamfered (rounded) rectangular cross section. It plays the role of transmitting current and connecting electrical equipment in the circuit. Copper busbar has been widely used in electrical equipment, especially complete sets of power distribution equipment.

[0043] Among them, in the power battery pack of new energy vehicles, the power battery pack includes multiple battery modules, the battery module includes multiple battery cells, and the copper busbar is used to connect the multiple battery modules in the power battery pack. In the process of designing the internal structure of the power battery pack, the copper busbar can be bent according to the required shape to achieve optimal layout.

[0044] Battery sampling chip (AFE chip): It is installed on the internal circuit board of the battery management system's main board. Its main function is to collect voltage, temperature, and current of the battery cells, as well as balance and communicate.

[0045] (2) Research background:

[0046] With the rapid development of new energy vehicles in recent years, the power battery pack, as the main power output in the vehicle, needs to have very high reliability to ensure the stable operation of the vehicle. At present, the power battery pack includes multiple battery modules, and the multiple battery modules are electrically connected by tightening the copper bar with bolts. When the battery pack is assembled, the bolts will be tightened according to the established torque. However, due to the complex operating conditions of the vehicle in the later stage, the bolts may become loose, thereby loosening the copper bar connection. For example, during the long-term use of the vehicle, due to the influence of temperature rise or the unreasonable design of the internal structure of the battery pack, the copper bar may become loose or age, causing damage to the battery cell and excessive battery energy consumption, thereby affecting the performance of the vehicle battery pack and even the personal safety of the user.

[0047] Therefore, in order to solve the adverse consequences caused by the looseness of the copper busbar, the present application provides a copper busbar connection status detection method, which determines the connection status of the copper busbar by the resistance of the copper busbar, so as to identify in advance whether the copper busbar has looseness or other abnormal connection conditions, so as to ensure the performance of the battery pack.

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0049] Figure 1 A flow chart of a copper busbar connection status detection method provided in an embodiment of the present application is as follows: Figure 1 As shown, the method includes:

[0050] 101. Detect the voltage of the copper busbar used to connect the battery module.

[0051] In the embodiment of the present application, optionally, the voltage across the copper busbar is monitored in real time by an AFE chip.

[0052] 102. Calculate a target resistance of the copper busbar by using the voltage of the copper busbar and a pre-calculated average current of the copper busbar.

[0053] In the embodiment of the present application, the target resistance of the copper busbar can be calculated by dividing the detected voltage of the copper busbar by the pre-calculated average current of the copper busbar.

[0054] 103. Determine whether a connection state of the copper busbar is abnormal according to a magnitude relationship between a target resistance of the copper busbar and a preset resistance value.

[0055] In the embodiment of the present application, when the copper busbar is normally connected to the battery module, the resistance of the copper busbar is usually 0.001Ω (1 milliohm). Therefore, it can be determined whether the connection state of the copper busbar is abnormal by judging whether the resistance of the copper busbar calculated in step 102 is greater than 1 milliohm.

[0056] Figure 2 A flowchart of another copper busbar connection status detection method provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the method includes:

[0057] 201. Through the battery sampling chip, the voltage of the copper bus used to connect the battery module is detected in real time at the end of vehicle charging and / or when the vehicle is powered on for the first time.

[0058] In this step, the vehicle charging terminal is used to indicate that the vehicle's power battery pack is in the final stage of being fully charged. The vehicle's first power-on is used to indicate that the vehicle's engine is charging the power battery pack after it is turned on, and the power battery pack is supplying power.

[0059] In the embodiment of the present application, a battery sampling chip is used to detect the voltage of the copper busbar in real time at the vehicle charging terminal and / or when the vehicle is powered on for the first time, and the voltage values ​​of multiple copper busbars can be obtained.

[0060] It should be noted that the purpose of collecting the voltage of the copper bar at the vehicle charging terminal and / or when the vehicle is powered on for the first time is: the study found that at the vehicle charging terminal and when the vehicle is powered on for the first time, the battery pack current is small, wherein the battery pack current is the current of the copper bar. By obtaining the current of the copper bar at the vehicle charging terminal and when the vehicle is powered on for the first time, the accuracy of the resistance of the copper bar calculated later can be improved. Therefore, the copper bar voltage corresponding to the current at this moment needs to be obtained, that is, the voltage of the copper bar at the vehicle charging terminal and when the vehicle is powered on for the first time. It should be noted that when the battery pack current is too large, the aggravation of the depolarization phenomenon will reduce the accuracy of the calculated copper bar resistance, and the reason for obtaining the battery pack current at the vehicle charging terminal and when the vehicle is powered on for the first time is that at the vehicle charging terminal, when the battery state of charge is close to full charge, the current at this time is relatively small according to the characteristics of the battery cell; when the vehicle is powered on for the first time, since the vehicle has been stationary for a long time, the battery parameters are relatively stable, so the current at this time is relatively small. When the current is small, the accuracy of the resistance of the copper bar calculated later can be improved.

[0061] Specifically, step 201 may include multiple acquisition schemes. As one of the acquisition schemes, a battery sampling chip may be used to detect the voltage of the copper busbar used to connect the battery module in real time at the end of vehicle charging to obtain multiple copper busbar voltage values.

[0062] As another data collection solution, a battery sampling chip can be used to detect the voltage of the copper busbar used to connect the battery module in real time when the vehicle is powered on for the first time to obtain multiple copper busbar voltage values.

[0063] As another data collection solution, a battery sampling chip can be used to detect the voltage of the copper busbar used to connect the battery module in real time at the end of vehicle charging and when the vehicle is powered on for the first time to obtain multiple copper busbar voltage values.

[0064] The embodiment of the present application can improve the accuracy of the subsequently calculated copper busbar resistance by collecting the copper busbar voltage at the vehicle charging terminal or when the vehicle is powered on for the first time. The accuracy of the calculated copper busbar resistance can be further improved by collecting the copper busbar voltage at the vehicle charging terminal and when the vehicle is powered on for the first time. Any collection scheme can be selected according to specific needs.

[0065] 202. Calculate a target resistance of the copper busbar according to the voltage of the copper busbar and a pre-calculated average current of the copper busbar.

[0066] In this step, regarding the process of obtaining the pre-calculated average current of the copper busbar, the current of the copper busbar within a preset time range is collected multiple times at the vehicle charging terminal and / or when the vehicle is powered on for the first time, and the average current is calculated.

[0067] The preset time range can be set according to demand, for example, the preset time range is five minutes.

[0068] The present application considers that by acquiring the current of the copper busbar at the vehicle charging terminal and when the vehicle is powered on for the first time, the accuracy of the resistance of the copper busbar calculated subsequently can be improved. Furthermore, the present application considers that the current may change slightly during the vehicle charging terminal and / or the first power-on of the vehicle. In order to more accurately calculate the resistance of the copper busbar, it is possible to set up a scheme for collecting the current of the copper busbar within a preset time range at the vehicle charging terminal and / or when the vehicle is powered on for the first time multiple times, and calculating the average current of the copper busbar, so as to further improve the accuracy of the resistance of the copper busbar calculated subsequently.

[0069] 203. Calculate a target resistance of the copper busbar according to the voltage of the copper busbar and the average current of the copper busbar.

[0070] In this step, specifically, based on the correspondence between the voltage of the average current copper bar and the average current of the copper bar, the voltage of the copper bar is divided by the pre-calculated average current of the copper bar to calculate the target resistance of the copper bar.

[0071] The corresponding relationship between the voltage of the copper busbar and the average current of the copper busbar includes: U|=|I|*R, wherein |U| represents the voltage of the copper busbar, |I| represents the pre-calculated average current of the copper busbar, and R represents the target resistance of the copper busbar.

[0072] Specifically, as a possible implementation scheme, step 203 may include: calculating a first resistance according to the voltage of the copper busbar detected at the vehicle charging terminal and the average current of the copper busbar calculated at the vehicle charging terminal, and using the first resistance as the target resistance of the copper busbar; or,

[0073] In this step, according to the formula: |U|=|I|*R, the multiple voltages of the copper bar collected at the vehicle charging terminal are divided by the average current of the copper bar calculated at the vehicle charging terminal to obtain the resistance of the copper bar (the resistance at this time is an intermediate value, and the target resistance needs to be further calculated), and then the resistances of the multiple copper bars are averaged to calculate the first resistance, wherein the first resistance represents the average resistance of the copper bar at the vehicle charging terminal, that is, the target resistance of the copper bar at the vehicle charging terminal.

[0074] For example, at the end of vehicle charging, the voltage of the copper bar collected by the battery sampling chip at the first moment is 4.2V, and the voltage of the copper bar collected at the second moment is 4.3V, and the average current of the copper bar calculated at the end of vehicle charging is 100A. Therefore, it can be calculated that the resistance of the copper bar corresponding to the first moment = 4.2 / 100 = 0.042Ω, and the resistance of the copper bar corresponding to the second moment = 4.3 / 100 = 0.043Ω, then the first resistance = (0.042+0.043) / 2 = 0.0425Ω, that is, the target resistance of the copper bar calculated at the end of vehicle charging is 0.0425Ω.

[0075] As another possible implementation scheme, step 203 may include: calculating a second resistance based on the voltage of the copper busbar detected when the vehicle is first powered on and the average current of the copper busbar calculated when the vehicle is first powered on, and using the second resistance as the target resistance of the copper busbar.

[0076] In this step, according to the formula: |U|=|I|*R, the multiple voltages of the copper bar collected when the vehicle is first powered on are divided by the average current of the copper bar calculated when the vehicle is first powered on, to obtain the resistance of the copper bar (the resistance at this time is an intermediate value, and the target resistance needs to be further calculated), and then the resistances of the multiple copper bars are averaged to calculate the second resistance, wherein the second resistance represents the average resistance of the copper bar when the vehicle is first powered on, that is, the target resistance of the copper bar when the vehicle is first powered on.

[0077] For example, when the vehicle is powered on for the first time, the voltage of the copper bar collected by the battery sampling chip at the first moment is 4.2V, and the voltage of the copper bar collected at the second moment is 4.3V. The average current of the copper bar calculated when the vehicle is powered on for the first time is 100A. Therefore, it can be calculated that the resistance of the copper bar corresponding to the first moment = 4 / 100 = 0.04Ω, and the resistance of the copper bar corresponding to the second moment = 4.2 / 100 = 0.042Ω, then the second resistance = (0.04+0.042) / 2 = 0.041Ω, that is, the target resistance of the copper bar calculated when the vehicle is powered on for the first time is 0.041Ω.

[0078] Based on the above two solutions, the present application also provides another possible solution. Step 203 may include: calculating the target resistance of the copper busbar based on the first resistance calculated at the charging terminal of the vehicle and the second resistance calculated when the vehicle is powered on for the first time.

[0079] In this step, according to the formula: |U|=|I|*R, the first resistance calculated when the vehicle is charged and the second resistance calculated when the vehicle is powered on for the first time are calculated respectively, and then the first resistance and the second resistance are averaged. The calculation process of the first resistance and the second resistance is referred to the above optional scheme, and this scheme will not be repeated.

[0080] For example, the first resistance = 0.0425Ω, the second resistance = 0.041Ω, and the target resistance of the copper busbar = (0.0425+0.0421) / 2 = 0.04175Ω.

[0081] It should be noted that in order to further improve the accuracy of the target resistance of the copper busbar, multiple first resistors and multiple second resistors can be obtained through multiple tests, and then the multiple first resistors and multiple second resistors can be averaged to calculate the target resistance of the copper busbar.

[0082] 204. Determine whether a connection state of the copper bus is abnormal according to a magnitude relationship between a target resistance of the copper bus and a preset resistance value.

[0083] In the embodiment of the present application, optionally, step 204 may include:

[0084] 2041. If the target resistance of the copper busbar is less than or equal to a preset resistance value, determine that the connection state of the copper busbar is normal.

[0085] In this step, the preset resistance value can be set according to the requirements, for example, the preset resistance value = 0.001Ω.

[0086] 2042. If the target resistance of the copper busbar is greater than a preset resistance value, determine that the connection state of the copper busbar is abnormal, wherein the reasons for the abnormal connection state of the copper busbar include but are not limited to loose copper busbar.

[0087] Figure 3 A schematic diagram of a copper busbar connection status detection device provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the device comprises:

[0088] A detection module 31, used to detect the voltage of the copper busbar used to connect the battery module;

[0089] A calculation module 32, used to calculate the target resistance of the copper busbar by using the voltage of the copper busbar and the pre-calculated average current of the copper busbar;

[0090] The determination module 33 is used to determine the connection state of the copper bus according to the target resistance of the copper bus.

[0091] In an embodiment of the present application, optionally, the determination module 33 of the device is specifically used to determine that the connection state of the copper bar is normal if the target resistance of the copper bar is less than or equal to a preset resistance value; if the target resistance of the copper bar is greater than the preset resistance value, determine that the connection state of the copper bar is abnormal.

[0092] In the embodiment of the present application, optionally, the device further includes: a collection module 34;

[0093] In the embodiment of the present application, optionally, the device acquisition module 34 is used to collect the current of the copper busbar within a preset time range multiple times at the vehicle charging terminal and / or when the vehicle is powered on for the first time;

[0094] The calculation module 32 is used to calculate the average current of the copper busbar.

[0095] In the embodiment of the present application, optionally, the detection module 31 of the device is specifically used to detect the voltage of the copper bus used to connect the battery module in real time through a battery sampling chip at the vehicle charging terminal and / or when the vehicle is powered on for the first time.

[0096] In an embodiment of the present application, optionally, the calculation module 32 of the device is specifically used to calculate a first resistance based on the voltage of the copper busbar detected at the charging end of the vehicle and the average current of the copper busbar calculated at the charging end of the vehicle, and use the first resistance as the target resistance of the copper busbar; or, calculate a second resistance based on the voltage of the copper busbar detected when the vehicle is first powered on and the average current of the copper busbar calculated when the vehicle is first powered on, and use the second resistance as the target resistance of the copper busbar.

[0097] In the embodiment of the present application, optionally, the calculation module 32 of the device is specifically used to calculate the target resistance of the copper busbar based on the first resistance calculated at the charging terminal of the vehicle and the second resistance calculated when the vehicle is powered on for the first time.

[0098] In an embodiment of the present application, optionally, the calculation module 32 of the device is also used to calculate the target resistance of the copper bar by dividing the voltage of the copper bar by the pre-calculated average current of the copper bar based on the correspondence between the voltage of the average current copper bar and the average current of the copper bar.

[0099] Figure 3 The row connection status detection device can perform Figure 2 The implementation principle and technical effect of the row connection state detection method described in the embodiment are not described in detail. The specific way in which each module and unit performs operations in the row connection state detection device in the above embodiment has been described in detail in the embodiment of the method, and will not be described in detail here.

[0100] In one possible design, Figure 3 The row connection status detection device of the embodiment shown can be implemented as an electronic device. Figure 4 As shown in , the electronic device may include a storage component 401 and a processing component 402;

[0101] The storage component 401 stores one or more computer instructions, wherein the one or more computer instructions are called and executed by the processing component 402 to implement Figure 1 or Figure 2 The row connection status detection method described in the embodiment.

[0102] The processing component 402 may include one or more processors to execute computer instructions to complete all or part of the steps in the above method. Of course, the processing component may also be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above Figure 1 or Figure 2 The row connection status detection method described in the embodiment.

[0103] The storage component 401 is configured to store various types of data to support operations at the terminal. The storage component 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 read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0104] The present application also provides a computer-readable storage medium storing a computer program, wherein the computer program can achieve the above-mentioned Figure 1 or Figure 2 The row connection status detection method of the embodiment is shown.

[0105] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0106] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0107] Through the description of the above implementation methods, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM or RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting the connection status of a copper busbar, characterized in that: include: Detect the voltage of the copper busbar used to connect the battery module; Calculating the target resistance of the copper busbar by using the voltage of the copper busbar and the pre-calculated average current of the copper busbar; Determining whether the connection state of the copper busbar is abnormal according to the magnitude relationship between the target resistance of the copper busbar and the preset resistance value; Wherein, the pre-calculated average current of the copper busbar includes: At the vehicle charging terminal and / or when the vehicle is powered on for the first time, the current of the copper busbar within a preset time range is collected multiple times, and the average current is calculated.

2. The method according to claim 1, characterized in that The detecting of the voltage of the copper busbar used to connect the battery module comprises: The battery sampling chip can detect the voltage of the copper busbar used to connect the battery module in real time at the end of vehicle charging and / or when the vehicle is powered on for the first time.

3. The method according to claim 1 or 2, characterized in that: The target resistance of the copper bus is calculated based on the voltage passing through the copper bus and the pre-calculated average current of the copper bus, including: Calculate a first resistance according to the voltage of the copper busbar detected at the vehicle charging terminal and the average current of the copper busbar calculated at the vehicle charging terminal, and use the first resistance as the target resistance of the copper busbar; or, The second resistance is calculated according to the voltage of the copper busbar detected when the vehicle is powered on for the first time and the average current of the copper busbar calculated when the vehicle is powered on for the first time, and the second resistance is used as the target resistance of the copper busbar.

4. The method according to claim 3, characterized in that Also includes: The target resistance of the copper bus is calculated based on the first resistance calculated at the end of the vehicle charging and the second resistance calculated when the vehicle is powered on for the first time.

5. The method according to claim 1, characterized in that The target resistance of the copper bus is calculated based on the voltage passing through the copper bus and the pre-calculated average current of the copper bus, including: The target resistance of the copper busbar is calculated by dividing the voltage of the copper busbar by the pre-calculated average current of the copper busbar.

6. A copper busbar connection status detection device, characterized in that: include: A detection module, used to detect the voltage of the copper busbar used to connect the battery module; A calculation module, configured to calculate a target resistance of the copper bar by using the voltage of the copper bar and the pre-calculated average current of the copper bar; wherein the pre-calculated average current of the copper bar comprises: collecting the current of the copper bar within a preset time range multiple times at the charging terminal of the vehicle and / or when the vehicle is powered on for the first time, and calculating the average current; The determination module is used to determine the connection state of the copper bus according to the target resistance of the copper bus.

7. An electronic device, characterized in that: It comprises a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are used to be called and executed by the processing component to implement the copper busbar connection status detection method as described in any one of claims 1-5.

8. A computer storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a computer, the copper busbar connection status detection method according to any one of claims 1 to 5 is implemented.

9. A vehicle battery, characterized in that: An electronic device comprising the electronic device described in claim 7.

10. A vehicle, characterized in that: Comprising a vehicle battery as claimed in claim 9.

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