Mobile battery state detection device and system

Abstract

The utility model discloses a mobile battery state detection device and system. The mobile battery state detection equipment comprises an electrical performance detection module, a signal simulation module, a relay module and a communication module, the electrical performance detection module is used for sending electrical performance detection parameters to a to-be-detected battery pack based on the communication module and receiving response parameters corresponding to the electrical performance detection parameters; the signal simulation module is used for sending simulation signal detection parameters to the battery pack to be detected based on the communication module and receiving response parameters corresponding to the simulation signal detection parameters; the relay module is used for sending relay detection parameters to the to-be-detected battery pack based on the communication module and receiving response parameters corresponding to the relay detection parameters. According to the embodiment of the utility model, the technical problem that the efficiency of data reading and fault analysis of the battery pack is low when the battery pack of the power battery system breaks down can be solved.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202211081501.8, filed on September 6, 2022, entitled “Mobile battery status detection device, system and method,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of battery detection, and in particular to a mobile battery status detection device and system. Background Art

[0004] As a core component of new energy vehicles, the performance of the power battery system directly impacts the overall vehicle's performance. When a battery pack in a power battery system fails, conventional techniques typically rely on manual analysis based on battery parameter information stored in the Battery Management System (BMS), or on reading battery pack data with a multimeter. These methods result in inefficient battery pack data reading and fault analysis. Utility Model Content

[0005] In view of the above problems, the present application provides a mobile battery status detection device and system, which can solve the technical problem of low efficiency in battery pack data reading and fault analysis when a communication or BMS fault occurs in the battery pack of a power battery system.

[0006] In the first aspect, the present application provides a mobile battery status detection device, which is used to detect battery packs to be tested under various working conditions; the mobile battery status detection device includes a battery communication device and a battery pack simulation device, and the battery communication device includes: an electrical performance detection module, a signal simulation module, a relay module, and a communication module; the electrical performance detection module is used to send electrical performance detection parameters to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the electrical performance detection parameters; the signal simulation module is used to send analog signal detection parameters to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the analog signal detection parameters; the relay module is used to send relay detection parameters to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the relay detection parameters; the battery pack simulation device is connected to the communication module; the battery pack simulation device is used to receive the detection parameters sent by the battery communication device and output response parameters corresponding to the detection parameters.

[0007] In the technical solution of the embodiment of the present utility model, the electrical performance detection module, the signal simulation module, the relay module and the communication module are integrated into a battery communication device. Based on the battery communication device, the detection parameters are sent to the battery pack to be tested, and the response parameters corresponding to the detection parameters are received to determine whether the battery pack or BMS has a fault. The battery pack data and fault code can be read without occupying the dedicated battery pack analysis channel of the production line, thereby improving the efficiency of battery pack data reading and fault detection.

[0008] In some embodiments, the electrical performance testing module includes a high-voltage interface and a high-voltage interlock interface; the high-voltage interface is used to connect a high-voltage power source to the battery pack under test; and the high-voltage interlock interface is used to diagnose whether the high-voltage interlock function of the electrical device containing the battery pack under test is functioning properly. In this embodiment, the high-voltage interface provides a high-voltage testing environment for the battery pack under test, and the high-voltage interlock interface determines whether the high-voltage interlock function of the battery management system in the battery pack is functioning properly. This detection method has few limitations and is highly universal.

[0009] In some embodiments, the electrical performance detection module includes: a current detection unit for diagnosing whether the current sensor in the battery pack under test is operating normally based on the current parameter information in the response parameter; and / or a temperature detection unit for monitoring the temperature in the battery pack under test. In this embodiment, the current detection unit can effectively determine whether the current sensor in the battery pack under test is operating normally, and the temperature detection unit can monitor the temperature in the battery pack under test in real time.

[0010] In some embodiments, the signal simulation module includes at least one of the following: an upper and lower power simulation unit, which is used to send upper and lower power simulation signals to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the upper and lower power simulation signals; a wake-up simulation unit, which is used to send a wake-up simulation signal to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the wake-up simulation signal; a collision simulation unit, which is used to send a collision simulation signal to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the collision simulation signal; in this embodiment, by setting the upper and lower power simulation unit, it is possible to effectively judge whether the upper and lower power functions of the battery pack to be tested are normal, by setting the wake-up simulation unit, it is possible to effectively judge whether the power wake-up function of the battery pack to be tested is normal, and by setting the collision simulation unit, it is possible to effectively judge whether the function of the power-consuming device where the battery pack to be tested is located is normal when a collision occurs.

[0011] In some embodiments, the relay module includes a relay interface and a relay drive control interface; the relay interface is used to detect the connection of a relay to the battery pack under test; the relay drive control interface is used to control the conduction and shutdown of a relay drive circuit in the battery pack under test; wherein the relay drive circuit is used to control the closing and opening of the detection relay. In this embodiment, by setting the relay interface and the relay drive control interface, it is possible to effectively determine whether the BMS in the battery pack under test can normally control the closing of a relay (such as a high-voltage relay).

[0012] In some embodiments, the battery communication device further includes a control module, which is connected to the electrical performance detection module, the signal simulation module, and the relay module, respectively. The control module is configured to control the input values ​​of the detection parameters. In this embodiment, by incorporating the control module into the battery communication device, the input values ​​of the detection parameters can be flexibly and conveniently adjusted, enabling testing of battery packs under various operating conditions, thereby improving the efficiency and compatibility of battery pack fault detection and analysis.

[0013] In the second aspect, the present invention implements an embodiment of a mobile battery status detection device, including a battery pack simulation device and the battery communication device in the above embodiment; the battery pack simulation device is connected to the battery communication device through the communication module; the battery pack simulation device is used to receive the detection parameters sent by the battery communication device and output response parameters corresponding to the detection parameters.

[0014] In this embodiment, a battery pack simulation device is used to simulate the battery pack to be tested, and various electrical parameters of the battery pack to be tested are output. Performance and fault detection of the battery to be tested can be completed without moving the battery pack to be tested, thereby reducing detection costs, improving detection efficiency, and shortening the detection cycle.

[0015] In some embodiments, the battery pack simulation device includes a battery management system and a battery equivalent circuit model, one end of the battery management system is connected to the battery equivalent circuit model, and the other end of the battery management system is connected to the communication module; the battery management system is used to receive the detection parameters sent by the battery communication device and transmit the detection parameters to the battery equivalent circuit model; receive the response parameters returned by the battery equivalent circuit model and transmit the response parameters to the communication module; the battery equivalent circuit model is used to respond based on the detection parameters and output the response parameters to the battery management system.

[0016] In this embodiment, various electrical parameters of the battery pack to be tested are simulated by a battery equivalent circuit model, which can comprehensively and accurately simulate the performance of the battery pack to be tested, reduce the detection cost, improve the battery pack detection efficiency, and shorten the detection cycle.

[0017] In some embodiments, the battery equivalent circuit model includes at least one of the following: a state-of-charge (SOC) management module, configured to simulate and output the SOC value of each cell in the battery pack under test; a voltage management module, configured to simulate and output the voltage of each cell in the battery pack under test; a temperature management module, configured to simulate and output the temperature of each cell in the battery pack under test; and a balancing module, configured to adjust the state parameters of one or more of the cells, wherein the state parameters include at least one of the SOC value, voltage, and temperature. In this embodiment, by providing the SOC management module, voltage management module, temperature management module, and balancing module, various state parameters of the battery pack under test can be simulated and adjusted, thereby improving the quality and efficiency of fault analysis.

[0018] In a third aspect, the present invention provides a battery status detection system comprising a host computer and the mobile battery status detection device of the aforementioned embodiment; the host computer is connected to the communication module of the mobile battery status detection device; the host computer is configured to send detection control instructions to the battery status detection device and receive status parameters of the battery pack under test. In this embodiment, the host computer can intuitively and conveniently obtain various electrical parameters of the battery pack under test and determine battery pack or BMS faults, while also facilitating unified operation and management of the various modules in the battery status detection device.

[0019] In a fourth aspect, the present invention provides a battery status detection device, comprising:

[0020] a sending unit, configured to send a detection control instruction to the battery communication device, so that the battery communication device obtains the state parameters of the battery pack to be tested from the battery pack simulation device;

[0021] a receiving unit, configured to receive the status parameter sent by the battery communication device, and determine whether the battery pack simulation device has an abnormality based on the status parameter;

[0022] A determination display unit is used to determine and display the current fault type of the battery pack simulation device when it is determined that an abnormality exists.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0025] Figure 1 A schematic structural diagram of a battery communication device provided in an embodiment of the present utility model;

[0026] Figure 2 A schematic structural diagram of another battery communication device provided in an embodiment of the present utility model;

[0027] Figure 3 A schematic structural diagram of another battery communication device provided in an embodiment of the present utility model;

[0028] Figure 4 A schematic structural diagram of another battery communication device provided in an embodiment of the present utility model;

[0029] Figure 5 A schematic structural diagram of another battery communication device provided in an embodiment of the present utility model;

[0030] Figure 6 A schematic structural diagram of another battery communication device provided in an embodiment of the present utility model;

[0031] Figure 7 A schematic diagram of the structure of a battery status detection device provided by an embodiment of the present utility model;

[0032] Figure 8 A schematic structural diagram of another battery status detection device provided by an embodiment of the present utility model;

[0033] Figure 9 A schematic diagram of the structure of a battery status detection system provided by an embodiment of the present utility model;

[0034] Figure 10 A schematic structural diagram of another battery status detection system provided by an embodiment of the present utility model;

[0035] Figure 11 A flow chart of a battery status detection method provided by an embodiment of the present utility model;

[0036] Figure 12 This is a structural diagram of a battery status detection device provided by an embodiment of the present utility model;

[0037] Figure 13 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of this utility model, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of this utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present invention, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0043] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0045] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0046] Currently, market developments indicate that power batteries are becoming increasingly widespread. They are used not only in energy storage systems such as hydropower, thermal, wind, and solar power plants, but also in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. In these fields, batteries are often used to provide power.

[0047] In related technologies, when testing the performance of a processed battery pack to see if it meets the standards, it is necessary to obtain the data parameters of the battery pack. Or, when a communication or BMS failure occurs during the use of the battery pack, it is also necessary to read the battery pack data and fault code in real time to identify the type of battery pack failure, providing information reference and analysis direction for the next step of analysis. Currently, battery pack data reading requires the use of a dedicated analysis channel for battery production lines, and requires a lot of manpower and material costs. There are also certain safety risks in high-voltage testing and other links. In addition, it also directly affects the production capacity and efficiency of the company. Moreover, due to the large weight and volume of the battery pack itself, the efficiency of reading and analyzing battery pack data at the whole pack level is low.

[0048] In order to solve the problem of low efficiency in reading and analyzing battery pack data, the inventors, after in-depth research, discovered that a battery communication device can be formed by integrating multiple modules or interfaces for performing data detection on the battery pack. Specifically, the battery communication device, which includes an electrical performance detection module, a signal simulation module, a relay module, and a communication module, sends electrical performance detection parameters to the battery pack to be tested and receives response parameters corresponding to the electrical performance detection parameters. The above design not only eliminates the need to occupy the dedicated battery pack analysis channel of the production line, but also improves the efficiency of battery pack data reading and fault analysis, and also improves the mobility of the battery pack detection equipment.

[0049] The battery communication device provided in the embodiments of the present invention can be applied to detect any battery, which can be a single cell or a battery pack or battery pack composed of multiple cells. The battery communication device provided in the embodiments of the present invention can be applied to detect electrical devices containing batteries, such as, but not limited to, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, among others.

[0050] For the convenience of description, the following embodiments take the battery communication device 10 as an example to illustrate a battery communication device according to an embodiment of the present application.

[0051] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the battery communication device 10 provided in some embodiments of the present application. Figure 1 As shown, the battery communication device 10 includes: an electrical performance detection module 102, a signal simulation module 104, a relay module 106, and a communication module 108. The electrical performance detection module 102 is configured to send electrical performance detection parameters to the battery pack under test based on the communication module and receive response parameters corresponding to the electrical performance detection parameters; the signal simulation module 104 is configured to send analog signal detection parameters to the battery pack under test based on the communication module 108 and receive response parameters corresponding to the analog signal detection parameters; the analog signal detection parameters include at least one of an upper and lower power simulation signal, a wake-up simulation signal, and a collision simulation signal; and the relay module 106 is configured to send relay detection parameters to the battery pack under test based on the communication module 108 and receive response parameters corresponding to the relay detection parameters.

[0052] Specifically, the electrical performance detection parameters include battery temperature, current, voltage, state of charge (SOC), mass, size and specific heat capacity, as well as parameters such as the convection heat transfer coefficient of the air, such as the voltage of each single cell inside the battery pack, the temperature of each temperature collection point inside the battery pack, and the battery pack health status information such as the total pressure of the battery pack, insulation resistance, inlet and outlet temperature of the cooling device and the actual SOC of the battery pack. The upper and lower electrical simulation signals here include but are not limited to, for example, the upper and lower electrical signals of the vehicle where the battery pack to be tested is located, the wake-up simulation signal includes but is not limited to, for example, the wake-up simulation signal of the vehicle where the battery pack to be tested is located, and the collision simulation signal includes but is not limited to, for example, the signal generated after the collision of the vehicle where the battery pack to be tested is located. The communication module 108 here includes but is not limited to a Controller Area Network (CAN) module.

[0053] CAN is a multi-host local network serial communication protocol developed to solve the data exchange between the numerous electronic control units in modern cars. The CAN bus connects the originally independent processing processes of multiple control units through twisted pair cables, optical cables, etc., thereby realizing information sharing among various control units on two CAN buses, and various sub-units realize information exchange and transmission on the same CAN bus. Among them, the CAN module consists of a CAN controller, a CAN transceiver, a data transmission line and a data transmission terminal.

[0054] The CAN controller is integrated inside the CAN module and receives data from the control unit microprocessor. The CAN controller processes the data transmitted by the control unit microprocessor and transmits it to the CAN transceiver. The CAN controller can also receive data from the transceiver, process it and transmit it to the control unit microprocessor, thereby realizing the conversion between the differential signal on the CAN bus and the digital signal inside the microprocessor.

[0055] The CAN transceiver is integrated into the CAN module and has the functions of receiving, transmitting, and converting data. It converts the digital signal sent by the CAN controller into a bus differential signal and sends it out through the data transmission line in a broadcast manner. At the same time, it receives the bus differential signal sent by the data transmission line and converts it into a digital signal that the CAN controller can recognize before sending it to the CAN controller.

[0056] The data transmission line uses twisted pair to reduce signal interference on the transmission line, namely CAN_H and CAN_L data lines.

[0057] The data transmission terminal is a resistor, which prevents signal reflection caused by impedance mismatch between the transmitting and receiving ends during data transmission, affecting the bus signal quality. The resistor is usually a 120Ω terminal resistor.

[0058] It should be noted that the communication module 108 may also include, for example, a Local Interconnect Network (LIN) module, an RS232 communication module, or an RS485 communication module, etc., and the embodiment of the present invention does not impose any limitation on this.

[0059] LIN is a low-cost automotive communication protocol standard, complementing the functionality of various existing automotive networks. The LIN standard includes specifications for transmission protocols, transmission media, development tool interfaces, and software programming interfaces. LIN enhances system architecture flexibility, ensures interoperability of network nodes in both hardware and software, and predictably achieves improved electromagnetic compatibility (EMC) characteristics. LIN complements the current multiple in-vehicle networks and facilitates the hierarchical implementation of in-vehicle networks, contributing to improved vehicle performance and reduced costs.

[0060] RS-232 is a serial data communication interface standard developed by the Electronic Industries Alliance. Its original full name is EIA-RS-232 (abbreviated as RS232). It is widely used for connections between Data Communication Equipment (DCE) and Data Terminal Equipment (DTE). RS232 interfaces are commonly used as debug ports in instrumentation, PLCs, and embedded systems. RS485, also known as TIA-485-A, ANSI / TIA / EIA-485, or simply TIA / EIA-485, is a standard that defines the electrical characteristics of drivers and receivers in balanced digital multipoint systems. This standard ensures that digital communication networks can effectively transmit signals even over long distances and in the presence of high electrical noise. RS485 allows for the configuration of low-cost local networks and multi-drop communication links.

[0061] The embodiment of the present application integrates the electrical performance detection module 102, the signal simulation module 104, the relay module 106 and the communication module 108 into a battery communication device 10. Based on the battery communication device 10, the detection parameters are sent to the battery pack to be tested, and the response parameters corresponding to the detection parameters are received to determine whether the battery pack or BMS has a fault. The battery pack data and fault code can be read without occupying the dedicated analysis channel of the battery production line, thereby improving the efficiency of battery pack data reading and fault detection.

[0062] According to some embodiments of the present application, optionally, please refer to Figure 2 .like Figure 2As shown, the electrical performance detection module 102 includes a high-voltage interface 1022 and a high-voltage interlock interface 1024; the high-voltage interface 1022 is used to connect the high-voltage power supply to the battery pack to be tested; the high-voltage interlock interface 1024 is used to diagnose whether the high-voltage interlock function status of the electrical device where the battery pack to be tested is located is normal.

[0063] Specifically, in this embodiment of the present invention, high-voltage interface 1022 allows high-voltage power supplies of varying voltages to be connected to the battery pack under test, providing high-voltage testing parameters for the battery pack under test. High-voltage interlock interface 1024 can diagnose, for example, whether the high-voltage interlock function of the vehicle housing the battery pack under test is functioning properly.

[0064] The embodiment of the utility model can provide a high-voltage test environment for the battery pack to be tested by setting a high-voltage interface. By setting a high-voltage interlock interface, it can be determined whether the high-voltage interlock detection of the battery management system in the battery pack is normal. The detection method has few limitations and high universality.

[0065] According to some embodiments of the present application, optionally, please refer to Figure 3 .like Figure 3 As shown, in the battery communication device 10, the electrical performance detection module 102 includes: a current detection unit 1026 and a temperature detection unit 1028. The current detection unit 1026 is used to diagnose whether the current sensor in the battery pack under test is operating normally based on the current parameter information in the response parameter; the temperature detection unit 1028 is used to monitor the temperature of the battery pack under test.

[0066] Specifically, the current detection unit 1026 includes but is not limited to a current-voltage-temperature (IVT) sensor interface, which is mainly used for current detection during the charging and discharging process of the battery pack in the embodiment of the utility model, and for detecting whether the voltage and temperature monitoring functions inside the battery pack are normal. The temperature detection unit 1028 includes but is not limited to a negative temperature coefficient thermistor (NTC), which monitors the internal temperature of the battery pack to be tested through the NTC, wherein the resistance of the NTC decreases as the temperature rises. Connecting the NTC can simulate the temperature monitoring function of the vehicle where the battery pack to be tested is located.

[0067] According to some embodiments of the present application, optionally, as Figure 4 As shown, in the battery communication device 10 , the electrical performance detection module 102 includes: a high voltage interface 1022 , a high voltage interlock interface 1024 , a current detection unit 1026 and a temperature detection unit 1028 .

[0068] In the embodiment of the present invention, by providing the current detection unit 1026 , it is possible to accurately determine whether the current sensor in the battery pack to be tested is working normally, and by providing the temperature detection unit 1028 , it is possible to monitor the temperature in the battery pack to be tested in real time.

[0069] According to some embodiments of the present application, the signal simulation module 104 includes at least one of the following: an upper and lower power simulation unit (not shown), which is used to send upper and lower power simulation signals to the battery pack under test based on the communication module and receive response parameters corresponding to the upper and lower power simulation signals; a wake-up simulation unit (not shown), which is used to send a wake-up simulation signal to the battery pack under test based on the communication module and receive response parameters corresponding to the wake-up simulation signal; and a collision simulation unit (not shown), which is used to send a collision simulation signal to the battery pack under test based on the communication module and receive response parameters corresponding to the collision simulation signal. In the embodiment of the present invention, by setting the upper and lower power simulation unit, it is possible to effectively determine whether the upper and lower power functions of the battery pack under test are normal, by setting the wake-up simulation unit, it is possible to effectively determine whether the power-using wake-up function of the battery pack under test is normal, and by setting the collision simulation unit, it is possible to effectively determine whether the function of the power-consuming device where the battery pack under test is located is normal when a collision occurs.

[0070] According to some embodiments of the present application, optionally, as Figure 5 As shown, the relay module 106 includes a relay interface 1062 and a relay drive control interface 1064; the relay interface 1062 is used to connect the detection relay to the battery pack to be tested; the relay drive control interface 1064 is used to control the conduction and shutdown of the relay drive circuit in the battery pack to be tested; wherein, the relay drive circuit is used to control the closing and opening of the detection relay.

[0071] Specifically, the relay drive circuit in the embodiment of the present invention includes the high-side and low-side relay drive circuits within the BMS. Relay interface 1062 connects to an external relay to determine whether the relay function of the battery pack under test is normal. Relay drive control interface 1064 is used to control the conduction and shutdown of the high-side and low-side relay drive circuits within the BMS within the battery pack, thereby closing and opening the external relay. By providing a relay interface and a relay drive control interface, the embodiment of the present invention can effectively determine whether the BMS in the battery pack under test can normally control the closure of relays (such as high-voltage relays).

[0072] According to some embodiments of the present application, optionally, please refer to Figure 6 .like Figure 6As shown, the battery communication device 10 further includes a control module 110 ; the control module 110 is connected to the electrical performance detection module 102 , the signal simulation module 104 , and the relay module 106 respectively; the control module 110 is used to control the parameter input value of the detection parameter.

[0073] Specifically, in this embodiment, for example, the parameter value of the detection parameter sent by the electrical performance detection module 102 or the signal simulation module 104 to the battery pack to be tested can be input through the control module 110. By setting the control module 110 in the battery communication device 10, the parameter value of the detection parameter can be adjusted flexibly and conveniently, and the battery pack to be tested under various working conditions can be tested, thereby improving the fault detection and analysis efficiency and compatibility of the battery pack.

[0074] According to some embodiments of the present application, optionally, as Figure 7 As shown, the present application also provides a mobile battery status detection device 1, which is used to detect battery packs to be tested under various working conditions. The mobile battery status detection device 1 includes a battery pack simulation device 20 and a battery communication device 10 in any of the above schemes. The battery pack simulation device 20 is connected via the communication module 108 in the battery communication device 10, and the battery pack simulation device 20 is used to receive the detection parameters sent by the battery communication device 10 and output response parameters corresponding to the detection parameters.

[0075] Specifically, the battery pack simulation device 20 is used to simulate various electrical parameters of the battery pack to be tested, such as simulating the SOC value, voltage and temperature of each single cell in the battery pack to be tested; it should be noted that the battery pack simulation device 20 includes but is not limited to an electrochemical model or an equivalent circuit model. The electrochemical model explains the dynamic mass transfer process between the positive and negative electrodes of the lithium battery in principle, and has high accuracy. The equivalent circuit model has a clear principle, simple calculation and linear characteristics, and is easy to estimate and predict the state of the battery, and is easy to implement in a real-time system. In an embodiment of the present utility model, the battery pack to be tested is simulated by a battery pack simulation device, and various electrical parameters of the battery pack to be tested are output. The performance and fault detection of the battery to be tested can be completed without moving the battery pack to be tested, which reduces the detection cost, improves the detection efficiency, and shortens the detection cycle.

[0076] According to some embodiments of the present application, optionally, as Figure 8As shown, the battery pack simulation device 20 includes a battery management system 202 and a battery equivalent circuit model 204, one end of the battery management system 202 is connected to the battery equivalent circuit model 204, and the other end of the battery management system 202 is connected to the communication module 108; the battery management system 202 is used to receive the detection parameters sent by the battery communication device 10, transmit the detection parameters to the battery equivalent circuit model 204, receive the response parameters returned by the battery equivalent circuit model 204, and transmit the response parameters to the communication module 108; the battery equivalent circuit model 204 is used to respond based on the detection parameters and output the response parameters to the battery management system 202.

[0077] Specifically, the battery management system 202 includes a battery monitoring unit (CMU) and a battery management unit (BMU). The CMU is responsible for measuring battery parameters such as voltage, current, and temperature, and also performs functions such as balancing. After measuring this data, the CMU transmits it to the BMU. The BMU is responsible for evaluating the data transmitted by the CMU. If the data is abnormal, it protects the battery by issuing a request to reduce the current or cutting off the charge and discharge path to prevent the battery from exceeding the permitted operating conditions. It also manages the battery's charge level and temperature. For example, based on a pre-designed control strategy, it determines the parameters and conditions that require an alert, and sends the alert to the vehicle controller where the battery pack under test is located, which can ultimately be communicated to the driver. The battery equivalent circuit model 204 is a battery equivalent system constructed based on the relationship between terminal voltage, internal resistance, capacitance, and current. By establishing the battery equivalent circuit model 204, the time-varying curve of the battery's external voltage can be directly simulated. The equivalent circuit model in the battery equivalent circuit model 204 can be written as a state-space equation, facilitating online real-time estimation. Depending on the internal device composition and circuit structure, the model can be further categorized into the internal resistance model, the Thevenin model, the PNGV model, and the Massimo Geraolo model. The internal resistance model is the simplest of all equivalent circuit models. This model treats the battery as a series connection of an ideal voltage source and a resistor. It is suitable for battery simulation analysis where precision is not a priority. The Thevenin model, also known as the first-order RC model, adds a parallel RC circuit to the internal resistance model, effectively representing the nonlinear characteristics of the battery. The PNGV battery model adds a series capacitor to the Thevenin model. This capacitor represents the accumulated error in the open-circuit voltage as the current accumulates during battery operation, offering greater accuracy. The Massimo Geraolo model is an improvement on the Thevenin model, fully accounting for the nonlinearity of the battery model. This model consists of the open-circuit voltage E, the ohmic internal resistance R0, and a multi-section RC parallel circuit. The Massimo Geraolo model further improves the accuracy of simulating the dynamic and static characteristics of the battery by increasing the order of the RC parallel circuit. It also takes into account the polarization reaction, ohmic and current accumulation effects during the battery discharge process. The more RC parallel circuits in series, the higher the model order, which can simulate the dynamic and static characteristics of the battery with higher accuracy.

[0078] Battery equivalent circuit model 204 includes, but is not limited to, internal resistance models, Thevenin models, PNGV models, and multi-order RC equivalent circuit models such as Massimo Geraolo. Battery equivalent circuit model 204 can simulate multiple electrical parameters, such as the SOC value, voltage, and temperature of each battery cell in the battery pack under test.

[0079] In this embodiment, various electrical parameters of the battery pack to be tested are simulated by a battery equivalent circuit model, which can comprehensively and accurately simulate the performance of the battery pack to be tested, reduce the detection cost and improve the battery pack detection efficiency, and has a wide range of applicable application scenarios and high accuracy.

[0080] According to some embodiments of the present application, the battery equivalent circuit model includes at least one of the following:

[0081] State of charge (SOC) management module, used to simulate and output the SOC value of each single cell in the battery pack to be tested;

[0082] The voltage management module is used to simulate and output the voltage of each single cell in the battery pack to be tested;

[0083] Temperature management module, used to simulate and output the temperature of each single cell in the battery pack to be tested;

[0084] The balancing module is used to adjust the state parameters of one or more single cells, wherein the state parameters include at least one of the SOC value, voltage and temperature.

[0085] In an embodiment of the present utility model, various performance parameters such as SOC values, voltage and temperature of the battery pack to be tested are simulated and adjusted by a battery equivalent circuit model, which can accurately and conveniently simulate the performance of the battery pack to be tested, reduce the detection cost and improve the battery pack detection efficiency.

[0086] According to some embodiments of the present application, optionally, as Figure 9 As shown, the present application also provides a battery status detection system 3, including a host computer 2 and the mobile battery status detection device 1 of the above embodiment; the host computer 2 is connected to the communication module 108 in the mobile battery status detection device 1; the host computer 2 is used to send detection control instructions to the mobile battery status detection device 1 and receive status parameters of the battery pack to be tested. The host computer 2 can intuitively and conveniently obtain various electrical parameters of the battery pack to be tested and determine faults in the battery pack or BMS, and facilitate unified operation and management of various modules in the battery status detection device 1.

[0087] According to some embodiments of the present application, optionally, as Figure 11As shown, the present application also provides a battery status detection method, which is applied to the battery status detection system in the above embodiment, including the following steps:

[0088] S1102 , the host computer 2 sends a detection control instruction to the battery communication device 10 , so that the battery communication device 10 obtains the state parameters of the battery pack to be tested from the battery pack simulation device 20 .

[0089] S1104 , the host computer 2 receives the status parameters sent by the battery communication device 10 , and determines whether the battery pack simulation device 20 has an abnormality based on the status parameters.

[0090] S1106 , when determining that an abnormality exists, the host computer 2 determines and displays the current fault type of the battery pack simulation device.

[0091] Specifically, for example, the host computer 2 sends a detection control instruction to the battery communication device 10. The battery communication device 10 responds to the detection control instruction by sending detection parameters to the battery pack simulation device 20. The battery pack simulation device 20 then feeds back response parameters based on the detection parameters to the battery communication device 10. The battery communication device 10 obtains the status parameters of the battery pack to be tested from the battery pack simulation device 20 and sends them to the host computer 2. The host computer 2 determines whether the battery pack simulation device 20 has an abnormality based on the status parameters. If an abnormality is determined, the current fault type of the battery pack simulation device is determined and displayed.

[0092] Fault types in the present embodiment include, but are not limited to, identification through diagnostic trouble codes (DTCs). These uniquely identify the fault type on the vehicle where the battery pack under test resides and serve as a basis for inspecting the components within the battery pack without disassembling it. To ensure the battery pack is in a healthy operating state, the battery management unit (BMU) is capable of self-diagnosing faults. DTCs are digital codes corresponding to different faults. When a fault occurs, a DTC read command can be sent to the BMU via the host computer 2. The DTC fault code returned by the BMU can be used to determine the specific fault type and information. Standard DTC fault display codes include an indicator prefix and three digits, such as "P0~P3" (power fault codes) and "U0~U3" (network fault codes). "P0" and "U0" are uniformly assigned for use or reserved for future use by the standard and cannot be assigned by the OEM. As shown in Table 1, Code categories are fault display codes, and Hex values ​​are fault codes in hexadecimal format. For example, fault code P1757 corresponds to a pre-charge circuit fault in the battery pack, fault code P0131 corresponds to a low current or voltage fault in the vehicle where the battery pack is located, and U3003-62 corresponds to a battery voltage signal comparison fault.

[0093] Table 1

[0094]

[0095] According to some embodiments of the present application, optionally, the sending of a detection control instruction to the battery communication device so that the battery communication device obtains the state parameters of the battery pack to be tested from the battery pack simulation device includes:

[0096] The host computer 2 sends a detection instruction corresponding to the target detection working condition to the battery pack simulation device 20, so that the battery pack simulation device 20 determines the target circuit model corresponding to the target detection working condition; the host computer 2 receives the state parameters of the target circuit model.

[0097] Specifically, the target detection conditions here include, but are not limited to, different conditions such as battery cell diving or the battery failing to perform battery health (State Of Health, SOH) detection for a preset period of time; assuming that when simulating a battery cell diving phenomenon to detect the battery pack, the host computer 2 sends a detection instruction corresponding to the battery cell diving to the battery pack simulation device 20, so that the battery pack simulation device 20 determines the target circuit model corresponding to the target detection condition; the target circuit model sends its own state parameters to the host computer 2 through the battery communication device 10. In this way, the state parameters of the battery pack under different working conditions can be quickly and accurately simulated and detected.

[0098] According to some embodiments of the present application, optionally, after determining and displaying the current fault type of the battery pack simulation device, it also includes: determining the current fault code of the battery pack simulation device; obtaining the current fault information corresponding to the current fault code from the preset mapping relationship between the fault code and the fault information; and displaying the current fault information.

[0099] Specifically, for example, the host computer 2 determines that the current fault code of the battery pack simulation device is P1757, and the host computer 2 obtains the current fault information corresponding to the current fault code from Table 1, which corresponds to a pre-charging circuit fault of the battery pack. The host computer 2 displays the current fault information.

[0100] In this embodiment, the current fault information of the battery pack to be tested is obtained through the fault code, so that the fault information of the battery pack to be tested can be automatically and conveniently obtained, which greatly improves the efficiency of battery pack fault analysis.

[0101] When a battery pack experiences a communication or BMS failure, real-time reading of the battery pack data and fault code is required to identify the fault type, providing information reference and analysis direction for further analysis. The weight and bulk of the battery pack itself make data reading and analysis at the entire pack level inefficient, requiring unnecessary time, space, manpower, and material resources, and also presenting certain safety risks. Whole-pack analysis and data reading requires dedicated analysis channels, resulting in poor mobility, inconvenience, and low efficiency.

[0102] In order to solve the above problem, according to some embodiments of the present application, optionally, as Figure 10 As shown, the present application also provides a battery status detection system, including a terminal device including a host computer, a communication tool and a battery pack to be tested. The communication tool and the BMU and CMU inside the battery pack can form a battery pack data acquisition system, and then use a multi-channel adjustable external power supply module to form a complete host computer monitoring and data acquisition system; wherein, the communication tool inherits multiple submodule interfaces, including:

[0103] The data communication CAN module is used to communicate with the BMU and obtain the battery pack status information, fault codes and data information stored in the BMU.

[0104] The power supply, wake-up, and collision signal simulation interfaces are used to simulate the normal power-on and power-off, wake-up, and collision signal functions of the vehicle where the battery pack to be tested is located.

[0105] The high-side and low-side relay drive signal analog interface is used to control the on and off of the high-side and low-side relay drive circuits inside the BMU to close and open the relays.

[0106] The high-voltage interlock interface can be used to simulate and diagnose the high-voltage interlock function status of the vehicle where the battery pack to be tested is located.

[0107] The high-voltage interface connects the battery pack to be tested through an external high-voltage power supply to realize the high-voltage detection function of the battery pack to be tested.

[0108] The relay interface is used to connect an external relay to the battery pack under test to verify the relay function.

[0109] The IVT interface is used to diagnose whether the current sensor in the battery pack to be tested is functioning normally by reading the message information sent by the data communication CAN module.

[0110] The NTC interface is used to connect the battery pack to be tested to the NTC to simulate the temperature monitoring function of the vehicle where the battery pack to be tested is located.

[0111] It should be noted that if Figure 10As shown, the simulated cell strings and external power modules can form different types of battery equivalent circuit models, simulating a variety of vehicle operating conditions or fault conditions. This eliminates the need to move the battery pack under test, achieving the same results as analyzing the entire battery pack under test. This also eliminates the need to occupy the dedicated battery pack analysis channel on the production line, significantly improving mobility and analysis efficiency. Furthermore, data analysis and collection are more flexible, allowing for a wider range of simulated operating conditions.

[0112] The communication tooling can simplify the analysis of the entire battery pack to be tested into a combined analysis of its sub-components. Battery pack data analysis and fault code reading can be completed both in the laboratory and after-sales service, without occupying the dedicated battery pack analysis channel of the production line. This provides a convenient way to analyze the entire battery pack and improves the quality and efficiency of battery pack analysis.

[0113] The present invention also provides a battery status detection device, which is used to execute the battery status detection method provided in the above embodiments. Figure 12 As shown, the device includes:

[0114] The sending unit 1202 is configured to send a detection control instruction to the battery communication device so that the battery communication device obtains the state parameters of the battery pack to be tested from the battery pack simulation device;

[0115] a receiving unit 1204 configured to receive the status parameter sent by the battery communication device, and determine whether the battery pack simulation device has an abnormality based on the status parameter;

[0116] The determination display unit 1206 is used to determine and display the current fault type of the battery pack simulation device when it is determined that an abnormality exists.

[0117] In the embodiment of the present application, the host computer 2 controls the battery communication device 10 to send detection parameters to the battery pack to be tested, and receives response parameters corresponding to the detection parameters to determine whether the battery pack or BMS has a fault. The battery pack data and fault code can be read without occupying the production line's dedicated analysis channel, thereby improving the efficiency of battery pack data reading and fault detection. The detection method has few limitations and high universality.

[0118] In another embodiment of the present application, the sending unit 1202 includes:

[0119] a sending module, configured to send a detection instruction corresponding to a target detection operating condition to the battery pack simulation device, so that the battery pack simulation device determines a target battery equivalent circuit model corresponding to the target detection operating condition;

[0120] A receiving module is used to receive the state parameters of the target battery equivalent circuit model.

[0121] The battery status detection device provided in the above-mentioned embodiment of the present application and the battery status detection method provided in the embodiment of the present invention are based on the same utility model concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0122] Figure 13 This is a block diagram of the logical structure of an electronic device according to an exemplary embodiment. For example, the electronic device 1300 may be an electronic device disposed within an electric device, including a vehicle controller, a motor controller, a domain controller, and the like, or a terminal connected to the battery communication device 10 via a wired or wireless network.

[0123] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions. The above instructions can be executed by a battery processor to complete the above-mentioned battery charging method, which includes: sending a detection control instruction to the battery communication device so that the battery communication device obtains the status parameters of the battery pack to be tested from the battery pack simulation device; receiving the status parameters sent by the battery communication device, and judging whether the battery pack simulation device has an abnormality based on the status parameters; if it is determined that an abnormality exists, determining and displaying the current fault type of the battery pack simulation device. Optionally, the above instructions can also be executed by the battery processor to complete the other steps involved in the above-mentioned exemplary embodiment. For example, the non-transitory computer-readable storage medium can be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

[0124] In an exemplary embodiment, an application / computer program product is also provided, comprising one or more instructions that can be executed by a battery processor to perform the aforementioned battery charging method. The method comprises: sending a detection control instruction to the battery communication device, causing the battery communication device to obtain status parameters of the battery pack under test from the battery pack simulation device; receiving the status parameters sent by the battery communication device, and determining whether the battery pack simulation device has an abnormality based on the status parameters; and if an abnormality is determined, determining and displaying the current fault type of the battery pack simulation device. Optionally, the aforementioned instructions can also be executed by the battery processor to perform the other steps involved in the aforementioned exemplary embodiment.

[0125] Figure 13 1300 is an example diagram of an electronic device. Figure 13It is only an example of the electronic device 1300 and does not constitute a limitation of the electronic device 1300. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device 1300 may also include input and output devices, network access devices, buses, etc.

[0126] The processor 1302 may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor 1302 may be any conventional processor. The processor 1302 is the control center of the electronic device 1300 and connects various parts of the entire electronic device 1300 using various interfaces and lines.

[0127] Memory 1301 can be used to store computer-readable instructions. Processor 1302 implements various functions of electronic device 1300 by running or executing computer-readable instructions or modules stored in memory 1301 and accessing data stored in memory 1301. Memory 1301 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as sound playback or image playback); the data storage area may store data generated based on the use of electronic device 1300. Furthermore, memory 1301 may include a hard disk, internal memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, a read-only memory (ROM), a random access memory (RAM), or other non-volatile or volatile storage devices.

[0128] If the modules integrated into electronic device 1300 are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the processes in the above-mentioned method embodiments by instructing related hardware to perform the processes through computer-readable instructions. The computer-readable instructions can be stored in a computer-readable storage medium, and when executed by a processor, the computer-readable instructions can implement the steps of each of the above-mentioned method embodiments.

[0129] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0130] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A mobile battery status detection device, characterized in that: The mobile battery status detection device is used to detect the battery pack to be tested under various working conditions; the mobile battery status detection device includes a battery communication device and a battery pack simulation device, and the battery communication device includes: an electrical performance detection module, a signal simulation module, a relay module, and a communication module; The electrical performance detection module is configured to send electrical performance detection parameters to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the electrical performance detection parameters; The signal simulation module is configured to send a simulation signal detection parameter to the battery pack to be tested based on the communication module, and receive a response parameter corresponding to the simulation signal detection parameter; The relay module is configured to send relay detection parameters to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the relay detection parameters; The battery pack simulation device is connected to the communication module; The battery pack simulation device is used to receive the detection parameters sent by the battery communication device and output response parameters corresponding to the detection parameters.

2. The device according to claim 1, characterized in that The electrical performance detection module includes a high voltage interface and a high voltage interlocking interface; The high-voltage interface is used to connect a high-voltage power source to the battery pack to be tested; The high-voltage interlock interface is used to diagnose whether the high-voltage interlock function status of the electrical device where the battery pack to be tested is located is normal.

3. The device according to claim 1 or 2, characterized in that The electrical performance detection module includes: a current detection unit, configured to diagnose whether the current sensor in the battery pack to be tested is operating normally based on the current parameter information in the response parameter; and / or The temperature detection unit is used to monitor the temperature of the battery pack to be tested.

4. The device according to claim 1, characterized in that The signal simulation module includes at least one of the following: an upper and lower power simulation unit, configured to send upper and lower power simulation signals to the battery pack to be tested based on the communication module, and receive response parameters corresponding to the upper and lower power simulation signals; A wake-up simulation unit, configured to send a wake-up simulation signal to the battery pack to be tested based on the communication module, and receive a response parameter corresponding to the wake-up simulation signal; A collision simulation unit is configured to send a collision simulation signal to the battery pack to be tested based on the communication module, and receive a response parameter corresponding to the collision simulation signal.

5. The device according to claim 1, characterized in that The relay module includes a relay interface and a relay drive control interface; The relay interface is used to connect the detection relay to the battery pack to be tested; The relay drive control interface is used to control the on and off of the relay drive circuit in the battery pack to be tested; wherein, the relay drive circuit is used to control the closing and opening of the detection relay.

6. The device according to claim 1, characterized in that Also includes: Control module; The control module is connected to the electrical performance detection module, the signal simulation module, and the relay module respectively; The control module is used to control the input value of the detection parameter.

7. The device according to claim 1, characterized in that The battery pack simulation device includes a battery management system and a battery equivalent circuit model, one end of the battery management system is connected to the battery equivalent circuit model, and the other end of the battery management system is connected to the communication module; The battery management system is configured to receive detection parameters sent by the battery communication device and transmit the detection parameters to the battery equivalent circuit model; receive response parameters returned by the battery equivalent circuit model and transmit the response parameters to the communication module; The battery equivalent circuit model is used to respond based on the detection parameters and output response parameters to the battery management system.

8. The device according to claim 7, characterized in that The battery equivalent circuit model includes at least one of the following: A state of charge (SOC) management module, configured to simulate and output the SOC value of each single cell in the battery pack to be tested; A voltage management module, configured to simulate and output the voltage of each single cell in the battery pack to be tested; A temperature management module, configured to simulate and output the temperature of each single cell in the battery pack to be tested; The balancing module is used to adjust the state parameters of one or more of the single cells, wherein the state parameters include at least one of the SOC value, voltage and temperature.

9. A battery status detection system, characterized in that: It comprises a host computer and a mobile battery status detection device according to any one of claims 1 to 8; The host computer is connected to the communication module in the battery communication device; The host computer is used to send detection control instructions to the battery status detection device and receive status parameters of the battery pack to be tested.

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