Parameter simulation circuit, battery management device, and control method of battery management device

Abstract

The present application provides a parameter simulation circuit, a battery management device, a control method and device for the battery management device, a storage medium, and a processor. The parameter simulation circuit is used to be electrically connected to the battery management system and to generate analog signals corresponding to the parameters of the battery, including temperature parameters, voltage parameters, current parameters, and fault parameters. The parameter simulation circuit replaces the lithium battery pack to connect to the battery management system, thereby performing corresponding supporting tests, and can test multiple battery management systems at the same time, thereby improving the efficiency of batch testing of the battery management system, and avoiding certain parameter differences between the lithium battery packs, which makes it impossible for the power management system to set unified technical parameters during the functional testing process, thereby improving the accuracy of the test.

Description

Technical Field

[0001] The present application relates to the technical field of battery management system detection, and in particular to a parameter simulation circuit, a battery management device, a control method and device for a battery management device, a storage medium, and a processor. Background Art

[0002] BMS is short for Battery Management System, which is the link between the battery and the user. Its main target is secondary batteries, in order to improve battery utilization and prevent overcharging and over-discharging of battery packs.

[0003] Currently, energy storage BMS (battery management systems) require testing of various lithium-ion battery packs during production testing. This process consumes time and reduces batch testing efficiency. Furthermore, parameter differences between individual lithium-ion battery packs prevent the BMS from setting uniform technical parameters during functional testing, enabling employees to distinguish between qualified and faulty products.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country to those skilled in the art. Summary of the Invention

[0005] The main purpose of this application is to provide a parameter simulation circuit, a battery management device, a control method and device for a battery management device, a storage medium and a processor to solve the problem of low efficiency of batch testing of battery management systems in the prior art.

[0006] According to one aspect of an embodiment of the present invention, a parameter simulation circuit is provided, which is used to be electrically connected to a battery management system and to generate analog signals corresponding to battery parameters, wherein the parameters include temperature parameters, voltage parameters, current parameters and fault parameters.

[0007] Optionally, the parameter simulation circuit includes: an operating mode converter, electrically connected to the battery management system, for converting the operating mode of the battery management system, the operating mode including a rest mode, a discharge mode, a charge mode and a fault protection mode.

[0008] Optionally, the working mode converter includes a first relay, and the parameter simulation circuit also includes a first DC power supply, multiple first test resistors and a first connector. The multiple first test resistors are connected in series on the first DC power supply, one end of any one of the first test resistors is electrically connected to one end of the first connector, and the other end of any one of the first test resistors is electrically connected to the other end of the first connector. The first relay is arranged on a first branch, and the first branch is a connection branch between the first connector and any one of the first test resistors. The first connector is electrically connected to the battery management system.

[0009] Optionally, the working mode converter also includes a second relay, the parameter simulation circuit includes a second DC power supply, multiple second test resistors and a second connector, the multiple second test resistors are connected in parallel, one end of each second test resistor is electrically connected to one end of the second DC power supply, the other end of each second test resistor is electrically connected to the second connector, the second connector is electrically connected to the other end of the second DC power supply, the second relay is arranged on the second branch, the second branch is a connection circuit between the second connector and any one of the second test resistors, and the second connector is electrically connected to the battery management system.

[0010] Optionally, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the working mode converter also includes a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is electrically connected to the battery positive electrode interface through a third branch, the positive electrode of the third DC power supply is electrically connected to the load positive electrode interface through a fourth branch, the negative electrode of the third DC power supply is electrically connected to the load negative electrode interface through a fifth branch, and the negative electrode of the third DC power supply is electrically connected to the battery negative electrode interface through a sixth branch. One end of the discharge element is electrically connected to the load positive electrode interface through the seventh branch, one end of the discharge element is electrically connected to the battery positive electrode interface through the eighth branch, the other end of the discharge element is electrically connected to the battery negative electrode interface through the ninth branch, and the other end of the discharge element is electrically connected to the load negative electrode interface through the tenth branch. The third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch.

[0011] According to another aspect of an embodiment of the present invention, a battery management device is provided, including a battery management system. The battery management device further includes any one of the parameter simulation circuits.

[0012] According to another aspect of an embodiment of the present invention, a control method for a battery management device is also provided, the control method comprising: determining an operating mode to be detected of a battery management system, the operating mode to be detected being any one of a plurality of operating modes of the battery management system, the plurality of operating modes comprising a static mode, a discharge mode, a charging mode and a fault protection mode; controlling the battery management system to enter the operating mode to be detected; obtaining parameters, the parameters being calculated based on an analog signal; and determining a detection result based on the parameters.

[0013] Optionally, the parameter simulation circuit also includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is connected to the battery through the third branch. The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The parameter simulation The circuit also includes an operating mode converter, which is electrically connected to the battery management system and is used to convert the operating mode of the battery management system. The operating mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are arranged in sequence and one-to-one on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the operating mode to be detected is the static mode, controlling the battery management system to enter the operating mode to be detected includes: controlling the first relay, the second relay, the third relay and the sixth relay to be turned on and controlling the fourth relay, the fifth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay to be turned off.

[0014] Optionally, the parameter simulation circuit also includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is connected to the battery through the third branch. The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The parameter simulation circuit The branch also includes an operating mode converter, which is electrically connected to the battery management system and is used to convert the operating mode of the battery management system. The operating mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are arranged in sequence and one-to-one on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the operating mode to be detected is the charging mode, controlling the battery management system to enter the operating mode to be detected also includes: controlling the first relay, the second relay, the fourth relay, the fifth relay to be turned on, the eighth relay and the ninth relay to be turned on, and controlling the third relay, the sixth relay, the seventh relay and the tenth relay to be turned off.

[0015] Optionally, the parameter simulation circuit also includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is connected to the battery through the third branch. The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The parameter simulation The circuit also includes an operating mode converter, which is electrically connected to the battery management system and is used to convert the operating mode of the battery management system. The operating mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are arranged in sequence and one-to-one on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the operating mode to be detected is the discharge mode, controlling the battery management system to enter the operating mode to be detected also includes: controlling the first relay, the second relay, the third relay, the sixth relay to be turned on, the seventh relay and the tenth relay to be turned on, and controlling the fourth relay, the fifth relay, the eighth relay and the ninth relay to be disconnected.

[0016] Optionally, the parameter simulation circuit also includes a first DC power supply, multiple first test resistors and a first connector, the first branch is a connecting branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, multiple second test resistors and a second connector, the second branch is a connecting circuit between the second connector and any one of the second test resistors, the parameter simulation circuit also includes an operating mode converter, the operating mode converter is electrically connected to the battery management system, the operating mode converter is used to convert the operating mode of the battery management system, the operating mode converter includes a first relay and a second relay, the first relay is set on the first branch, and the second relay is set on the second branch. When the operating mode to be detected is a fault protection mode, controlling the battery management system to enter the operating mode to be detected also includes: controlling the first relay and / or the second relay to disconnect.

[0017] Optionally, the test result is determined based on the parameters, including: when the absolute value of the difference between each parameter and the standard value is less than or equal to a predetermined threshold, the test result is qualified, and one standard value corresponds to one parameter under one working mode; when the absolute value of the difference between any one parameter and the corresponding standard value is greater than the predetermined threshold, the test result is unqualified.

[0018] According to another aspect of an embodiment of the present invention, a control device for a battery management device is further provided, the control device comprising: a first determination unit, for determining an operating mode to be detected of the battery management system, the operating mode to be detected being any one of the operating modes of the battery management system, the operating modes including a rest mode, a discharge mode, a charging mode and a fault protection mode; a control unit, for controlling the battery management system to enter the operating mode to be detected; an acquisition unit, for acquiring parameters, the parameters being calculated based on analog signals; and a second determination unit, for determining a detection result based on the parameters.

[0019] According to another aspect of the embodiments of the present invention, a storage medium is provided, wherein the storage medium includes a stored program, wherein the program executes any one of the control methods.

[0020] According to yet another aspect of the embodiments of the present invention, a processor is provided, which is configured to run a program, wherein the program executes any one of the control methods when running.

[0021] In an embodiment of the present invention, the parameter simulation circuit generates an analog signal corresponding to the battery parameters, and the battery management system receives the analog signal to operate. The parameter simulation circuit replaces the lithium battery pack and connects to the battery management system to perform corresponding supporting tests. It can also test multiple battery management systems simultaneously, improving the efficiency of batch testing of the battery management system, solving the problem of low efficiency of batch testing of battery management systems in the prior art, and avoiding the problem that certain parameter differences between lithium battery packs make it impossible for the power management system to set unified technical parameters during functional testing, thereby improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0023] Figure 1 A partial structural diagram of a parameter simulation circuit according to an embodiment of the present application is shown;

[0024] Figure 2 A partial structural diagram of a parameter simulation circuit according to an embodiment of the present application is shown;

[0025] Figure 3 A partial structural diagram of a parameter simulation circuit according to an embodiment of the present application is shown;

[0026] Figure 4 A schematic diagram of a battery management device according to an embodiment of the present application is shown;

[0027] Figure 5 A flow chart showing a method for controlling a battery management device according to an embodiment of the present application is shown; and

[0028] Figure 6 A schematic diagram of a control device of a battery management device according to an embodiment of the present application is shown.

[0029] The above drawings include the following reference numerals:

[0030] 100. Battery management system; 101. Battery positive terminal interface; 102. Battery negative terminal interface; 103. Load positive terminal interface; 104. Load negative terminal interface; 10. Parameter simulation circuit; 11. Working mode converter; 110. First relay; 111. Second relay; 112. Third relay; 113. Fourth relay; 114. Fifth relay; 115. Sixth relay; 116. Seventh relay; 117. Eighth relay; 118. Ninth relay; 119. Tenth relay; 12. First DC power supply; 13. First test resistor; 14. First connector; 15. Second DC power supply; 16. Second test resistor; 17. Second connector; 18. Third DC power supply; 19. Discharge element; 20. Control chip; 30. Suitable indicator light; 40. Fault indicator light; 50. Operation indicator light; 60. Start button; 70. End button; 80. Emergency stop button; 90. Display module DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element or intervening elements may be present. Moreover, in the specification and claims, when it is described that an element is "connected to" another element, the element may be "directly connected to" the other element or "connected to" the other element through a third element.

[0035] As mentioned in the background technology, the battery management system in the prior art has low efficiency in batch testing. In order to solve the above problem, in a typical embodiment of the present application, a parameter simulation circuit, a battery management device, a control method and device for the battery management device, a storage medium and a processor are provided.

[0036] According to an embodiment of the present application, a parameter simulation circuit is provided, which is used to be electrically connected to the above-mentioned battery management system and to generate an analog signal corresponding to the parameters of the battery, wherein the above-mentioned parameters include temperature parameters, voltage parameters, current parameters and fault parameters.

[0037] In the parameter simulation circuit, the parameter simulation circuit generates analog signals corresponding to the battery parameters, and the battery management system receives the analog signals to operate. The parameter simulation circuit replaces the lithium battery pack and connects to the battery management system to perform corresponding supporting tests. It can also test multiple battery management systems simultaneously, improving the efficiency of batch testing of the battery management system and solving the problem of low batch testing efficiency of battery management systems in the prior art. It also avoids the problem that certain parameter differences between lithium battery packs make it impossible for the power management system to set unified technical parameters during functional testing, thereby improving the accuracy of the test.

[0038] In one embodiment of the present application, the parameter simulation circuit includes an operating mode converter, which is electrically connected to the battery management system. The operating mode converter is used to convert the operating mode of the battery management system, and the operating modes include a rest mode, a discharge mode, a charging mode, and a fault protection mode. Specifically, since the test battery management system has a rest mode, a discharge mode, a charging mode, and a fault protection mode, it is necessary to test the battery management system in various operating modes. The operating mode converter adjusts the connection method of the parameter simulation circuit so that the parameter simulation circuit generates analog signals corresponding to each operating mode, thereby realizing the conversion of the operating mode of the battery management system during testing.

[0039] In one embodiment of the present application, Figure 1As shown, the above-mentioned working mode converter 11 includes a first relay 110, and the above-mentioned parameter simulation circuit 10 also includes a first DC power supply 12, a plurality of first test resistors 13 and a first connector 14. The plurality of the above-mentioned first test resistors 13 are connected in series to the above-mentioned first DC power supply 12, and one end of any one of the above-mentioned first test resistors 13 is electrically connected to one end of the above-mentioned first connector 14, and the other end of any one of the above-mentioned first test resistors 13 is electrically connected to the other end of the above-mentioned first connector 14. The above-mentioned first relay 110 is arranged on the first branch, and the above-mentioned first branch is a connecting branch between the above-mentioned first connector 14 and any one of the above-mentioned first test resistors 13. The above-mentioned first connector 14 is electrically connected to the above-mentioned battery management system. Specifically, since one end of any one of the first test resistors 13 is electrically connected to one end of the first connector 14, and the other end of any one of the first test resistors 13 is electrically connected to the other end of the first connector 14, the first connector 14 collects the voltage signal and the total voltage signal of any one of the first test resistors 13, thereby generating voltage simulation signals of each cell of the battery pack and the total voltage simulation signal of the battery pack, and sending the above voltage simulation signals to the battery management system through the first connector 14, thereby collecting the voltage parameters of each cell of the battery pack and the total voltage parameters of the battery pack.

[0040] It should be noted that when the above-mentioned first relay is connected, the analog voltage signal is normal, and the working mode of the battery management system can be any one of the static mode, discharge mode and charging mode. When the above-mentioned first relay is disconnected, an analog voltage signal is abnormal, and the battery management system enters the fault protection mode.

[0041] In one embodiment of the present application, Figure 2 As shown, the operating mode converter 11 further includes a second relay 111. The parameter simulation circuit 10 includes a second DC power supply 15, a plurality of second test resistors 16, and a second connector 17. The plurality of second test resistors 16 are connected in parallel, one end of each second test resistor 16 is electrically connected to one end of the second DC power supply 15, and the other end of each second test resistor 16 is electrically connected to the second connector 17. The second connector 17 is electrically connected to the other end of the second DC power supply 15. The second relay 111 is arranged on a second branch, which is a connection circuit between the second connector 17 and any one of the second test resistors 16. The second connector 17 is electrically connected to the battery management system. Specifically, since the other end of each second test resistor is electrically connected to the second connector 17, the second connector 17 collects the temperature signal of each second test resistor, thereby generating a temperature simulation signal of each cell of the battery pack. The temperature simulation signal is sent to the battery management system via the fourth connector, thereby collecting the temperature parameters of each cell of the battery pack.

[0042] It should be noted that the temperature signal may be a current signal, and the temperature parameter may be calculated based on the current parameter corresponding to the current signal.

[0043] It should also be noted that when the above-mentioned second relay is turned on and the simulated temperature signal is normal, the working mode of the battery management system can be any one of the static mode, discharge mode and charging mode. When the above-mentioned second relay is disconnected, resulting in an abnormal simulated temperature signal, the battery management system enters the fault protection mode.

[0044] In one embodiment of the present application, Figure 3 As shown, the battery management system 100 includes a battery positive electrode interface 101, a battery negative electrode interface 102, a load positive electrode interface 103 and a load negative electrode interface 104, the working mode converter 11 also includes a third relay 112, a fourth relay 113, a fifth relay 114, a sixth relay 115, a seventh relay 116, an eighth relay 117, a ninth relay 118 and a tenth relay 119, the parameter simulation circuit 10 also includes a third DC power supply 18 and a discharge element 19, the positive electrode of the third DC power supply 18 is electrically connected to the battery positive electrode interface 101 through a third branch, the positive electrode of the third DC power supply 18 is electrically connected to the load positive electrode interface 103 through a fourth branch, the negative electrode of the third DC power supply 18 is electrically connected to the load negative electrode interface 104 through a fifth branch, and the negative electrode of the third DC power supply 18 is electrically connected to the battery positive electrode interface 101 through a sixth branch. The negative electrode interface 102 is electrically connected, one end of the discharge element 19 is electrically connected to the load positive electrode interface 103 through the seventh branch, one end of the discharge element 19 is electrically connected to the battery positive electrode interface 101 through the eighth branch, the other end of the discharge element 19 is electrically connected to the battery negative electrode interface 102 through the ninth branch, and the other end of the discharge element 19 is electrically connected to the load negative electrode interface 104 through the tenth branch. The third relay 112, the fourth relay 113, the fifth relay 114, the sixth relay 115, the seventh relay 116, the eighth relay 117, the ninth relay 118 and the tenth relay 119 are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch.

[0045] Specifically, the above-mentioned third DC power supply serves as a battery and the above-mentioned discharge element serves as a load. By controlling the on and off of the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay, the connection mode of the third DC power supply and the discharge element with the battery management system can be adjusted, so that the battery management system can be switched between the static mode, the discharge mode and the charging mode.

[0046] The present application also provides a battery management device, such as Figure 4 As shown, the battery management device includes a battery management system 100 , and the battery management device further includes any one of the above-mentioned parameter simulation circuits 10 .

[0047] The battery management device includes a battery management system and a parameter simulation circuit. The parameter simulation circuit generates analog signals corresponding to the battery parameters, and the battery management system receives these analog signals to operate. The parameter simulation circuit replaces the lithium battery pack and connects to the battery management system to perform corresponding supporting tests. It can also test multiple battery management systems simultaneously, improving the efficiency of batch testing of the battery management system and solving the problem of low batch testing efficiency of battery management systems in the prior art. It also avoids the problem that certain parameter differences between lithium battery packs make it impossible for the power management system to set unified technical parameters during functional testing, thereby improving test accuracy.

[0048] In one embodiment of the present application, Figure 4 As shown, the battery management device further includes a control chip 20. The control chip 20 is electrically connected to the parameter simulation circuit 10 and is in communication with the battery management system 100. The control chip 20 is configured to calculate corresponding parameters based on the simulated signals and determine the detection results based on the parameters. Specifically, the control chip 20 is also in communication with the operating mode converter 11, and controls the switching of the operating mode of the battery management system by turning the operating mode converter 11 on and off.

[0049] In one embodiment of the present application, Figure 4 As shown, the battery management device further includes a suitable indicator light 30, a fault indicator light 40, and an operating indicator light 50, all of which are electrically connected to the control chip 20. Specifically, during the battery management device testing process, the operating indicator light 50 illuminates; when testing stops, the operating indicator light 50 turns off. If the test result is qualified, the suitable indicator light 30 illuminates and the fault indicator light 40 turns off. If the test result is unqualified, the suitable indicator light 30 turns off and the fault indicator light 40 illuminates.

[0050] In one embodiment of the present application, Figure 4As shown, the battery management device further includes a suitable indicator light 30, a fault indicator light 40, an operating indicator light 50, a start button 60, an end button 70, and an emergency stop button 80. The suitable indicator light 30, the fault indicator light 40, the operating indicator light 50, the start button 60, the end button 70, and the emergency stop button 80 are all electrically connected to the control chip 20. Specifically, the start button 60 controls the battery management device to start testing, i.e., to power on the control chip 20, the battery management system 100, and the parameter simulation circuit 10. The end button 70 controls the battery management device to shut down and stop testing, i.e., to power off the control chip 20, the battery management system 100, and the parameter simulation circuit 10. The emergency stop button 80 controls the battery management device to suspend testing in standby mode, i.e., to urgently power off the control chip 20, the battery management system 100, and the parameter simulation circuit 10.

[0051] In one embodiment of the present application, Figure 4 As shown, the battery management device further includes a display module 90 , which is electrically connected to the control chip 20 and is used to display the test results for easy viewing by test personnel.

[0052] The present application also provides a method for controlling a battery management device. It should be noted that the method for controlling a battery management device according to the present application can be used to control the battery management device provided in the present application. The following describes the method for controlling a battery management device according to the present application.

[0053] Figure 5 FIG. 1 is a flow chart of a control method for a battery management device according to an embodiment of the present application. Figure 5 As shown, the above control method includes:

[0054] Step S101, determining a to-be-detected operating mode of the battery management system, where the to-be-detected operating mode is any one of the multiple operating modes of the battery management system, including a rest mode, a discharge mode, a charge mode, and a fault protection mode;

[0055] Step S102, controlling the battery management system to enter the above-mentioned waiting-for-detection working mode;

[0056] Step S103, obtaining parameters, which are calculated based on the simulation signal;

[0057] Step S104: determining the detection result according to the above parameters.

[0058] In the above control method, first, the working mode to be detected of the battery management system is determined, and then the above battery management system is controlled to enter the working mode to be detected, that is, the parameter simulation circuit is controlled to generate an analog signal corresponding to the parameters of the battery in the working mode to be detected, and then the parameters are obtained, that is, the corresponding parameters calculated according to the analog signal, and finally, the test results are determined according to the parameters, so that there is no need to use different lithium battery packs for corresponding supporting tests, and multiple battery management systems can be tested at the same time, which improves the efficiency of batch testing of the battery management system, solves the problem of low efficiency of batch testing of battery management systems in the prior art, and avoids certain parameter differences between the lithium battery packs, which leads to the problem that the power management system cannot set unified technical parameters during the functional testing process, thereby improving the accuracy of the test.

[0059] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0060] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit further includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the battery through the third branch, the positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The negative electrode interface is electrically connected, and the parameter simulation circuit also includes a working mode converter, which is electrically connected to the battery management system. The working mode converter is used to convert the working mode of the battery management system. The working mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the working mode to be detected is the static mode, controlling the battery management system to enter the working mode to be detected includes: controlling the first relay, the second relay, the third relay and the sixth relay to be turned on and controlling the fourth relay, the fifth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay to be turned off.

[0061] Specifically, the first relay and the second relay are controlled to be turned on, the voltage simulation signal and the temperature simulation signal generated by the parameter simulation circuit are normal, the battery management system will not enter the fault protection mode, the third relay and the sixth relay are controlled to be turned on and the fourth relay, the fifth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are all controlled to be disconnected, that is, the positive pole of the third DC power supply is connected to the battery positive electrode interface of the battery management system, the negative pole of the third DC power supply is connected to the battery negative electrode interface of the battery management system, and the discharge element is not connected to the battery management system, indicating that the battery is neither charging nor discharging, and the battery management system is in static mode.

[0062] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit further includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the battery through the third branch, the positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The interface is electrically connected, the parameter simulation circuit also includes a working mode converter, the working mode converter is electrically connected to the battery management system, and the working mode converter is used to convert the working mode of the battery management system. The working mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the working mode to be detected is the charging mode, controlling the battery management system to enter the working mode to be detected also includes: controlling the first relay, the second relay, the fourth relay, the fifth relay to be turned on, the eighth relay and the ninth relay to be turned on, and controlling the third relay, the sixth relay, the seventh relay and the tenth relay to be disconnected.

[0063] Specifically, the first relay and the second relay are controlled to be turned on, the voltage simulation signal and the temperature simulation signal generated by the parameter simulation circuit are normal, the battery management system will not enter the fault protection mode, the fourth relay, the fifth relay, the eighth relay and the ninth relay are controlled to be turned on, and the third relay, the sixth relay, the seventh relay and the tenth relay are controlled to be disconnected, that is, the positive pole of the third DC power supply is connected to the load positive interface of the battery management system, the negative pole of the third DC power supply is connected to the load negative interface of the battery management system, one end of the discharge element is connected to the battery positive interface of the battery management system, and the other end of the discharge element is connected to the battery negative interface of the battery management system, indicating that the direction of the current is from the load positive interface to the battery positive interface or the battery negative interface to the load negative interface, and the battery management system is in charging mode.

[0064] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit further includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the battery through the third branch, the positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The pole interface is electrically connected, the parameter simulation circuit also includes a working mode converter, the working mode converter is electrically connected to the battery management system, and the working mode converter is used to convert the working mode of the battery management system. The working mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the working mode to be detected is the discharge mode, controlling the battery management system to enter the working mode to be detected also includes: controlling the first relay, the second relay, the third relay, the sixth relay to be turned on, the seventh relay and the tenth relay to be turned on, and controlling the fourth relay, the fifth relay, the eighth relay and the ninth relay to be disconnected.

[0065] Specifically, the first relay and the second relay are controlled to be turned on, the voltage simulation signal and the temperature simulation signal generated by the parameter simulation circuit are normal, the battery management system will not enter the fault protection mode, the third relay, the sixth relay, the seventh relay and the tenth relay are controlled to be turned on and the fourth relay, the fifth relay, the eighth relay and the ninth relay are controlled to be disconnected, that is, the positive pole of the third DC power supply is connected to the battery positive interface of the battery management system, the negative pole of the third DC power supply is connected to the battery negative interface of the battery management system, one end of the discharge element is connected to the load positive interface of the battery management system, and the other end of the discharge element is connected to the load negative interface of the battery management system, indicating that the direction of the current is from the battery positive interface to the load positive interface or from the load negative interface to the battery negative interface, and the battery management system is in discharge mode.

[0066] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the parameter simulation circuit further includes a working mode converter, the working mode converter is electrically connected to the battery management system, the working mode converter is used to convert the working mode of the battery management system, the working mode converter includes a first relay and a second relay, the first relay is arranged on the first branch, and the second relay is arranged on the second branch. When the working mode to be detected is a fault protection mode, controlling the battery management system to enter the working mode to be detected further includes: controlling the first relay and / or the second relay to be disconnected. Specifically, controlling the first relay and / or the second relay to be disconnected, the voltage simulation signal and / or the temperature simulation signal generated by the parameter simulation circuit is abnormal, and the battery management system enters the fault protection mode.

[0067] In one embodiment of the present application, the test result is determined based on the above parameters, including: if the absolute value of the difference between each of the above parameters and the standard value is less than or equal to a predetermined threshold, the test result is qualified, and one of the above standard values corresponds to one of the above parameters in one of the above operating modes; if the absolute value of the difference between any of the above parameters and the corresponding standard value is greater than the above predetermined threshold, the test result is unqualified. Specifically, the above standard value is the test standard corresponding to the parameter, and the above predetermined threshold can be adjusted according to actual conditions to ensure that all parameters of qualified products are within the allowable error range.

[0068] The present application also provides a control device for a battery management device. It should be noted that the control device for a battery management device according to the present application can be used to execute the control method for a battery management device according to the present application. The following describes the control device for a battery management device according to the present application.

[0069] Figure 6 is a schematic diagram of a control device of a battery management device according to an embodiment of the present application, the control device comprising:

[0070] A first determining unit 1 is configured to determine a to-be-detected operating mode of the battery management system, where the to-be-detected operating mode is any one of the operating modes of the battery management system, including a rest mode, a discharge mode, a charge mode, and a fault protection mode;

[0071] Control unit 2, used to control the battery management system to enter the above-mentioned waiting-for-detection working mode;

[0072] An acquisition unit 3 is used to acquire parameters, where the parameters are calculated based on the analog signal;

[0073] The second determining unit 4 is configured to determine the detection result according to the above parameters.

[0074] In the above-mentioned control device, the first determination unit determines the working mode to be detected of the battery management system, and the control unit controls the above-mentioned battery management system to enter the working mode to be detected, that is, the parameter simulation circuit is controlled to generate an analog signal corresponding to the parameters of the battery in the working mode to be detected, and the acquisition unit acquires the parameters, that is, the corresponding parameters calculated according to the analog signal. The second determination unit determines the detection result according to the parameters, so that there is no need to use different lithium battery packs for corresponding supporting tests, and multiple battery management systems can be tested at the same time, which improves the efficiency of batch testing of the battery management system, solves the problem of low efficiency of batch testing of battery management systems in the prior art, and avoids the problem that there are certain parameter differences between the lithium battery packs, which leads to the inability of the power management system to set unified technical parameters during the functional detection process, thereby improving the accuracy of the test.

[0075] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit further includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the battery through the third branch, the positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The pole interface is electrically connected, the parameter simulation circuit also includes a working mode converter, the working mode converter is electrically connected to the battery management system, and the working mode converter is used to convert the working mode of the battery management system. The working mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch, and the control unit includes a first control module, and the first control module is used to control the first relay, the second relay, the third relay and the sixth relay to be turned on and control the fourth relay, the fifth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay to be turned off when the working mode to be detected is the static mode.

[0076] Specifically, the first relay and the second relay are controlled to be turned on, the voltage simulation signal and the temperature simulation signal generated by the parameter simulation circuit are normal, the battery management system will not enter the fault protection mode, the third relay and the sixth relay are controlled to be turned on and the fourth relay, the fifth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are all controlled to be disconnected, that is, the positive pole of the third DC power supply is connected to the battery positive electrode interface of the battery management system, the negative pole of the third DC power supply is connected to the battery negative electrode interface of the battery management system, and the discharge element is not connected to the battery management system, indicating that the battery is neither charging nor discharging, and the battery management system is in static mode.

[0077] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit further includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the battery through the third branch, the positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The interface is electrically connected, the parameter simulation circuit also includes a working mode converter, the working mode converter is electrically connected to the battery management system, and the working mode converter is used to convert the working mode of the battery management system. The working mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch, and the control unit includes a second control module, and the second control module is used to control the first relay, the second relay, the fourth relay, the fifth relay to be turned on, the eighth relay and the ninth relay to be turned on, and control the third relay, the sixth relay, the seventh relay and the tenth relay to be disconnected when the working mode to be detected is the charging mode.

[0078] Specifically, the first relay and the second relay are controlled to be turned on, the voltage simulation signal and the temperature simulation signal generated by the parameter simulation circuit are normal, the battery management system will not enter the fault protection mode, the fourth relay, the fifth relay, the eighth relay and the ninth relay are controlled to be turned on, and the third relay, the sixth relay, the seventh relay and the tenth relay are controlled to be disconnected, that is, the positive pole of the third DC power supply is connected to the load positive interface of the battery management system, the negative pole of the third DC power supply is connected to the load negative interface of the battery management system, one end of the discharge element is connected to the battery positive interface of the battery management system, and the other end of the discharge element is connected to the battery negative interface of the battery management system, indicating that the direction of the current is from the load positive interface to the battery positive interface or the battery negative interface to the load negative interface, and the battery management system is in charging mode.

[0079] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit further includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply The positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the battery through the third branch, the positive electrode of the third DC power supply is electrically connected to the positive electrode interface of the load through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the load through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the negative electrode interface of the battery through the sixth branch, one end of the discharge element is electrically connected to the positive electrode interface of the load through the seventh branch, one end of the discharge element is electrically connected to the positive electrode interface of the battery through the eighth branch, the other end of the discharge element is electrically connected to the negative electrode interface of the battery through the ninth branch, and the other end of the discharge element is electrically connected to the negative electrode interface of the load through the tenth branch. The pole interface is electrically connected, the parameter simulation circuit also includes a working mode converter, the working mode converter is electrically connected to the battery management system, and the working mode converter is used to convert the working mode of the battery management system. The working mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch, and the control unit includes a third control module, which is used to control the first relay, the second relay, the third relay, the sixth relay to be turned on, the seventh relay and the tenth relay to be turned on and control the fourth relay, the fifth relay, the eighth relay and the ninth relay to be disconnected when the working mode to be detected is the discharge mode.

[0080] Specifically, the first relay and the second relay are controlled to be turned on, the voltage simulation signal and the temperature simulation signal generated by the parameter simulation circuit are normal, the battery management system will not enter the fault protection mode, the third relay, the sixth relay, the seventh relay and the tenth relay are controlled to be turned on and the fourth relay, the fifth relay, the eighth relay and the ninth relay are controlled to be disconnected, that is, the positive pole of the third DC power supply is connected to the battery positive interface of the battery management system, the negative pole of the third DC power supply is connected to the battery negative interface of the battery management system, one end of the discharge element is connected to the load positive interface of the battery management system, and the other end of the discharge element is connected to the load negative interface of the battery management system, indicating that the direction of the current is from the battery positive interface to the load positive interface or from the load negative interface to the battery negative interface, and the battery management system is in discharge mode.

[0081] In one embodiment of the present application, the parameter simulation circuit further includes a first DC power supply, a plurality of first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit further includes a second DC power supply, a plurality of second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the parameter simulation circuit further includes a working mode converter, the working mode converter is electrically connected to the battery management system, the working mode converter is used to convert the working mode of the battery management system, the working mode converter includes a first relay and a second relay, the first relay is arranged on the first branch, the second relay is arranged on the second branch, the control unit includes a fourth control module, the fourth control module is used to control the first relay and / or the second relay to be disconnected when the working mode to be detected is a fault protection mode. Specifically, the first relay and / or the second relay are controlled to be disconnected, the voltage simulation signal and / or the temperature simulation signal generated by the parameter simulation circuit is abnormal, and the battery management system enters the fault protection mode.

[0082] In one embodiment of the present application, the second determination unit includes a first determination module and a second determination module, wherein the first determination module is used to determine that the test result is qualified when the absolute value of the difference between each of the above parameters and the standard value is less than or equal to a predetermined threshold value, and one of the above standard values corresponds to one of the above parameters under one of the above working modes; and the second determination module is used to determine that the test result is unqualified when the absolute value of the difference between any of the above parameters and the corresponding standard value is greater than the predetermined threshold value. Specifically, the standard value is the test standard corresponding to the parameter, and the predetermined threshold value can be adjusted according to actual conditions to ensure that the parameters of qualified products are within the allowable error range.

[0083] In one embodiment of the present application, Figure 4 As shown, the control device of the battery management device is a control chip 20. The control chip 20 is electrically connected to the parameter simulation circuit 10 and is in communication with the battery management system 100. It is used to calculate the corresponding parameters based on the simulated signals and determine the detection results based on these parameters. Specifically, the control chip 20 is also in communication with the operating mode switch 11, and controls the switching of the operating mode of the battery management system by turning the operating mode switch 11 on and off.

[0084] The above-mentioned control device includes a processor and a memory. The above-mentioned first determination unit, control unit, acquisition unit and second determination unit are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0085] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the low efficiency of batch testing in the battery management system in the prior art can be solved by adjusting the kernel parameters.

[0086] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0087] An embodiment of the present invention provides a storage medium on which a program is stored. When the program is executed by a processor, the above-mentioned control method is implemented.

[0088] An embodiment of the present invention provides a processor, which is used to run a program, wherein the control method is executed when the program is run.

[0089] An embodiment of the present invention provides a device, comprising a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, at least the following steps are performed:

[0090] Step S101, determining a to-be-detected operating mode of the battery management system, where the to-be-detected operating mode is any one of the multiple operating modes of the battery management system, including a rest mode, a discharge mode, a charge mode, and a fault protection mode;

[0091] Step S102, controlling the battery management system to enter the above-mentioned waiting-for-detection working mode;

[0092] Step S103, obtaining parameters, which are calculated based on the simulation signal;

[0093] Step S104: determining the detection result according to the above parameters.

[0094] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0095] The present application also provides a computer program product, which, when executed on a data processing device, is adapted to execute a program for initializing at least the following method steps:

[0096] Step S101, determining a to-be-detected operating mode of the battery management system, where the to-be-detected operating mode is any one of the multiple operating modes of the battery management system, including a rest mode, a discharge mode, a charge mode, and a fault protection mode;

[0097] Step S102, controlling the battery management system to enter the above-mentioned waiting-for-detection working mode;

[0098] Step S103, obtaining parameters, which are calculated based on the simulation signal;

[0099] Step S104: determining the detection result according to the above parameters.

[0100] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the above-mentioned units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0102] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0103] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0104] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the above-mentioned methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0105] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0106] 1) In the parameter simulation circuit of the present application, the parameter simulation circuit generates an analog signal corresponding to the battery parameters, and the battery management system receives the above analog signal to operate. The above parameter simulation circuit replaces the lithium battery pack to connect to the battery management system, thereby performing corresponding supporting tests, and can test multiple battery management systems at the same time, improving the efficiency of batch testing of the battery management system, solving the problem of low efficiency of batch testing of battery management systems in the prior art, and avoiding the problem that certain parameter differences between lithium battery packs make it impossible for the power management system to set unified technical parameters during the functional testing process, thereby improving the accuracy of the test.

[0107] 2) The battery management device of the present application includes a battery management system and a parameter simulation circuit. The parameter simulation circuit generates an analog signal corresponding to the battery parameters, and the battery management system receives the analog signal to operate. The parameter simulation circuit replaces the lithium battery pack and connects to the battery management system to perform corresponding supporting tests. It can also test multiple battery management systems at the same time, improving the efficiency of batch testing of the battery management system, solving the problem of low efficiency of batch testing of battery management systems in the prior art, and avoiding the problem of certain parameter differences between the lithium battery packs, which makes it impossible for the power management system to set unified technical parameters during the functional testing process, thereby improving the accuracy of the test.

[0108] 3) In the control method of the present application, first, the working mode to be detected of the battery management system is determined, and then the above-mentioned battery management system is controlled to enter the working mode to be detected, that is, the parameter simulation circuit is controlled to generate an analog signal corresponding to the parameters of the battery in the working mode to be detected, and then the parameters are obtained, that is, the corresponding parameters calculated according to the analog signal, and finally, the test results are determined according to the parameters, so that there is no need to use different lithium battery packs for corresponding supporting tests, and multiple battery management systems can be tested at the same time, which improves the efficiency of batch testing of the battery management system, solves the problem of low efficiency of batch testing of battery management systems in the prior art, and avoids certain parameter differences between the lithium battery packs, which leads to the problem that the power management system cannot set unified technical parameters during the functional testing process, thereby improving the accuracy of the test.

[0109] 4) In the control device of the present application, the first determination unit determines the working mode to be detected of the battery management system, and the control unit controls the above-mentioned battery management system to enter the working mode to be detected, that is, the parameter simulation circuit is controlled to generate an analog signal corresponding to the parameters of the battery in the working mode to be detected, and the acquisition unit obtains the parameters, that is, the corresponding parameters calculated according to the analog signal. The second determination unit determines the test result according to the parameters, so that there is no need to use different lithium battery packs for corresponding supporting tests, and multiple battery management systems can be tested at the same time, which improves the efficiency of batch testing of the battery management system, solves the problem of low efficiency of batch testing of battery management systems in the prior art, and avoids the problem that there are certain parameter differences between the lithium battery packs, which leads to the inability of the power management system to set unified technical parameters during the functional detection process, thereby improving the accuracy of the test.

[0110] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A parameter simulation circuit, characterized in that: The parameter simulation circuit is used to be electrically connected to the battery management system and to generate analog signals corresponding to battery parameters, including temperature parameters, voltage parameters, current parameters and fault parameters; The parameter simulation circuit includes: an operating mode converter, electrically connected to the battery management system, and used to convert the operating mode of the battery management system, wherein the operating modes include a static mode, a discharge mode, a charging mode, and a fault protection mode; the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface, and a load negative electrode interface; the operating mode converter also includes a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay, and a tenth relay; the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is electrically connected to the battery positive electrode interface through a third branch, the positive electrode of the third DC power supply is electrically connected to the load positive electrode interface through a fourth branch, the negative electrode of the third DC power supply is electrically connected to the load negative electrode interface through a fifth branch, the negative electrode of the third DC power supply is electrically connected to the battery negative electrode interface through a sixth branch, one end of the discharge element is electrically connected to the load positive electrode interface through a seventh branch, one end of the discharge element is electrically connected to the battery positive electrode interface through an eighth branch, and the other end of the discharge element is electrically connected to the battery negative electrode through a ninth branch. The operating mode converter includes a first relay and a second relay. When the first relay, the second relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay, and the tenth relay are turned on, the charging mode is entered. When the first relay, the second relay, the fourth relay, the fifth relay, the eighth relay, the ninth relay, and the tenth relay are turned on, the charging mode is entered. When the first relay, the second relay, the third relay, the sixth relay, the seventh relay, and the tenth relay are turned on, and the fourth relay, the fifth relay, the eighth relay, and the ninth relay are turned on, the discharging mode is entered.

2. The parameter simulation circuit according to claim 1, characterized in that: The parameter simulation circuit also includes a first DC power supply, multiple first test resistors and a first connector. The multiple first test resistors are connected in series to the first DC power supply. One end of any one of the first test resistors is electrically connected to one end of the first connector, and the other end of any one of the first test resistors is electrically connected to the other end of the first connector. The first relay is arranged on a first branch. The first branch is a connection branch between the first connector and any one of the first test resistors. The first connector is electrically connected to the battery management system.

3. The parameter simulation circuit according to claim 1, characterized in that: The parameter simulation circuit includes a second DC power supply, multiple second test resistors and a second connector. The multiple second test resistors are connected in parallel, one end of each second test resistor is electrically connected to one end of the second DC power supply, the other end of each second test resistor is electrically connected to the second connector, the second connector is electrically connected to the other end of the second DC power supply, the second relay is arranged on the second branch, the second branch is a connection circuit between the second connector and any one of the second test resistors, and the second connector is electrically connected to the battery management system.

4. A battery management device, comprising a battery management system, characterized in that: The battery management device further comprises the parameter simulation circuit according to any one of claims 1 to 3.

5. A control method for a battery management device according to claim 4, characterized in that: The control method includes: Determining a to-be-detected operating mode of the battery management system, where the to-be-detected operating mode is any one of multiple operating modes of the battery management system, the multiple operating modes comprising a rest mode, a discharge mode, a charge mode, and a fault protection mode; Controlling the battery management system to enter the to-be-detected working mode; Obtaining parameters, where the parameters are calculated based on the analog signal; A detection result is determined according to the parameters.

6. The control method according to claim 5, characterized in that: The parameter simulation circuit also includes a first DC power supply, multiple first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, multiple second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is electrically connected to the battery positive electrode interface through the third branch, the positive electrode of the third DC power supply is electrically connected to the load positive electrode interface through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the load negative electrode interface through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the battery negative electrode interface through the sixth branch, one end of the discharge element is electrically connected to the load positive electrode interface through the seventh branch, and one end of the discharge element is electrically connected to the battery positive electrode interface through the eighth branch. The other end of the discharge element is electrically connected to the battery negative electrode interface through a ninth branch, and the other end of the discharge element is electrically connected to the load negative electrode interface through a tenth branch. The parameter simulation circuit also includes an operating mode converter, which is electrically connected to the battery management system. The operating mode converter is used to convert the operating mode of the battery management system. The operating mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, and the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the working mode to be detected is the stationary mode, controlling the battery management system to enter the working mode to be detected includes: The first relay, the second relay, the third relay, and the sixth relay are controlled to be turned on, and the fourth relay, the fifth relay, the seventh relay, the eighth relay, the ninth relay, and the tenth relay are controlled to be turned off.

7. The control method according to claim 5, characterized in that: The parameter simulation circuit also includes a first DC power supply, multiple first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, multiple second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is electrically connected to the battery positive electrode interface through the third branch, the positive electrode of the third DC power supply is electrically connected to the load positive electrode interface through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the load negative electrode interface through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the battery negative electrode interface through the sixth branch, one end of the discharge element is electrically connected to the load positive electrode interface through the seventh branch, and one end of the discharge element is electrically connected to the battery positive electrode interface through the eighth branch. The other end of the discharge element is electrically connected to the battery negative electrode interface through a ninth branch, and the other end of the discharge element is electrically connected to the load negative electrode interface through a tenth branch. The parameter simulation circuit also includes an operating mode converter, which is electrically connected to the battery management system. The operating mode converter is used to convert the operating mode of the battery management system. The operating mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, and the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the operating mode to be detected is the charging mode, controlling the battery management system to enter the operating mode to be detected further includes: The first relay, the second relay, the fourth relay, and the fifth relay are controlled to be turned on, the eighth relay and the ninth relay are controlled to be turned on, and the third relay, the sixth relay, the seventh relay, and the tenth relay are controlled to be turned off.

8. The control method according to claim 5, characterized in that: The parameter simulation circuit also includes a first DC power supply, multiple first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, multiple second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the battery management system includes a battery positive electrode interface, a battery negative electrode interface, a load positive electrode interface and a load negative electrode interface, the parameter simulation circuit also includes a third DC power supply and a discharge element, the positive electrode of the third DC power supply is electrically connected to the battery positive electrode interface through the third branch, the positive electrode of the third DC power supply is electrically connected to the load positive electrode interface through the fourth branch, the negative electrode of the third DC power supply is electrically connected to the load negative electrode interface through the fifth branch, the negative electrode of the third DC power supply is electrically connected to the battery negative electrode interface through the sixth branch, one end of the discharge element is electrically connected to the load positive electrode interface through the seventh branch, and one end of the discharge element is electrically connected to the battery positive electrode interface through the eighth branch. The other end of the discharge element is electrically connected to the battery negative electrode interface through a ninth branch, and the other end of the discharge element is electrically connected to the load negative electrode interface through a tenth branch. The parameter simulation circuit also includes an operating mode converter, which is electrically connected to the battery management system. The operating mode converter is used to convert the operating mode of the battery management system. The operating mode converter includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay, wherein the first relay is arranged on the first branch, the second relay is arranged on the second branch, and the third relay, the fourth relay, the fifth relay, the sixth relay, the seventh relay, the eighth relay, the ninth relay and the tenth relay are sequentially and one-to-one correspondingly arranged on the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, the eighth branch, the ninth branch and the tenth branch. When the working mode to be detected is the discharge mode, controlling the battery management system to enter the working mode to be detected further includes: The first relay, the second relay, the third relay, and the sixth relay are controlled to be turned on, the seventh relay and the tenth relay are controlled to be turned on, and the fourth relay, the fifth relay, the eighth relay, and the ninth relay are controlled to be turned off.

9. The control method according to claim 5, characterized in that: The parameter simulation circuit also includes a first DC power supply, multiple first test resistors and a first connector, the first branch is a connection branch between the first connector and any one of the first test resistors, the parameter simulation circuit also includes a second DC power supply, multiple second test resistors and a second connector, the second branch is a connection circuit between the second connector and any one of the second test resistors, the parameter simulation circuit also includes an operating mode converter, the operating mode converter is electrically connected to the battery management system, the operating mode converter is used to convert the operating mode of the battery management system, the operating mode converter includes a first relay and a second relay, the first relay is arranged on the first branch, and the second relay is arranged on the second branch, In a case where the working mode to be detected is a fault protection mode, controlling the battery management system to enter the working mode to be detected further includes: The first relay and / or the second relay are controlled to be opened.

10. The control method according to claim 5, characterized in that: Determining a detection result according to the parameters includes: When the absolute value of the difference between each parameter and the standard value is less than or equal to a predetermined threshold, the test result is qualified, and one standard value corresponds to one parameter in one working mode; When the absolute value of the difference between any one of the parameters and the corresponding standard value is greater than the predetermined threshold, the detection result is unqualified.

11. A control device for a battery management device according to claim 4, characterized in that: The control device comprises: A first determining unit, configured to determine an operating mode to be detected of the battery management system, wherein the operating mode to be detected is any operating mode of the battery management system, and the operating modes include a rest mode, a discharge mode, a charge mode, and a fault protection mode; A control unit, configured to control the battery management system to enter the to-be-detected working mode; an acquiring unit, configured to acquire parameters, wherein the parameters are calculated based on the analog signal; The second determining unit is configured to determine a detection result according to the parameters.

12. A storage medium, characterized in that: The storage medium includes a stored program, wherein the program executes the control method according to any one of claims 5 to 10.

13. A processor, characterized in that: The processor is configured to run a program, wherein the program executes the control method according to any one of claims 5 to 10 when running.

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