Battery test circuit and equipment

Abstract

The utility model discloses a battery test circuit and equipment, relates to the technical field of battery test, and solves the technical problems that the battery test needs connection of a computer and a test tool, the operation process is complicated, and the test efficiency is influenced. The test circuit comprises a controller, a voltage stabilization module, an I2C communication module and an HMI communication module, the voltage stabilization module, the I2C communication module and the HMI communication module are all connected with the controller, and a chip signal of the controller is APT32F103; the voltage stabilizing module is used for providing stable working voltage for the controller; the I2C communication module is connected with the test battery through an I2C communication protocol, and obtains working parameters of the test battery based on the controller; and the HMI communication module is connected with the display device and is driven by the controller to display working parameters of the tested battery. According to the utility model, test process control and test parameter acquisition are carried out through the APT32F103 chip, the test cost is reduced, the reliability is high, and meanwhile, the HMI communication module is connected with the display equipment, so that the user operation is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery test technical field especially relates to a battery test circuit and equipment. BACKGROUND

[0002] TI (Texas Instruments, Texas Instruments) battery management device is identified as the prefix BQ and is divided into single cell, multiple cell and special product categories. According to the naming rule, BQ27 series faces CEDV (Compensated End of Discharge Voltage, compensated discharge end voltage) and traditional single cell battery, and BQ27Z series faces current single cell battery. BQ20Z, 30Z and 40Z face multiple cell batteries using Impedance Track (impedance tracking) technology, and BQ20 series, 30 series and 40 series face multiple cell batteries using CEDV. Multiple cell capacity monitoring meter is used for notebook computer, medical application and industrial application, such as computer, unmanned aerial vehicle and electrical appliance. BQ series battery is widely used, and corresponding battery test needs to be carried out.

[0003] Battery test is usually to test the performance information such as current, voltage, capacity, internal resistance, charge, discharge temperature and battery cycle life of the battery. Part of the test depends on the circuit in the test equipment to realize the test, and another part depends on the computer cooperating with the test box to issue instructions.

[0004] In the process of realizing the utility model, the applicant finds that at least the following problems exist in the prior art:

[0005] The battery test of BQ series needs to be connected with the computer and test tool, the operation process is complex, the operator is prone to error, and the test efficiency is affected. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a battery test circuit and equipment to solve the technical problems that the battery test of BQ series in the prior art needs to be connected with the computer and test tool, the operation process is complex, the operator is prone to error, and the test efficiency is affected. The preferred technical scheme in many technical schemes provided by the utility model can produce many technical effects, which are described in detail below.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] The utility model provides a kind of battery test circuit, including controller, voltage stabilizing module, I2C communication module, HMI communication module, the voltage stabilizing module, I2C communication module, HMI communication module are connected with the controller, the chip signal of the controller is APT32F103;The voltage stabilizing module is used to provide stable operating voltage to the controller;I2C communication module is connected with test battery by I2C communication protocol, and the operating parameter of test battery is acquired based on controller;HMI communication module is connected with display device, and the operating parameter of test battery is driven to show by controller.

[0009] Preferably, the chip model of the I2C communication module is ISO1540, the I2C communication module is connected with the test battery through I2C_SDA_C pin, I2C_SCKC pin, and connected with the test battery through connector J2, for acquiring the operating parameter of the test battery;The I2C communication module is connected with the controller through I2C_SDA pin, I2C_SCK pin.

[0010] Preferably, the HMI communication module includes isolation chip 121U31, communication chip RS485;The isolation chip 121U31 is connected with the controller through pTX pin, pRX pin, the RO pin, DI pin of the communication chip RS485 is connected with the VIB pin, VOA pin of the isolation chip 121U31 respectively;The communication chip RS485 is connected with display device through connector J1.

[0011] Preferably, the battery test circuit further includes display enable module, the display enable module is connected with the controller through 485_EN pin, and connected with the X1 pin of the communication chip RS485 through photo-coupler element.

[0012] Preferably, the voltage stabilizing module is used for converting 12V DC power supply into stable 3.3V DC, and the LDO chip model of the voltage stabilizing module is LD1117.

[0013] Preferably, the battery test circuit further includes thermocouple conversion module, for converting the operating temperature of the test battery into digital signal, and the chip model of the thermocouple conversion module is MAX31855;The thermocouple conversion module is connected with the controller through SPI_CLK pin, SPI_CS pin, SPI_MISO pin, and the thermocouple conversion module is connected with the test battery through connector J3.

[0014] Preferably, the battery test circuit further includes voltage detection module, the voltage detection module is connected with the test battery through connector J5, and connected with the controller through AD V pin.

[0015] Preferably, the battery test circuit further comprises a debugging module, the debugging module is connected with the controller through a SWCK pin and a SWDA pin, and the debugging module is connected with the upper computer through a connector J4.

[0016] Preferably, the battery test circuit further comprises an indicator light module, the indicator light module is connected with the controller through a PA12 pin, and the indicator light module is turned on when the PA12 pin is at a high level.

[0017] A battery test device comprises the battery test circuit.

[0018] The above technical scheme has the following advantages or beneficial effects:

[0019] The APT32F103 chip is used for test process control and test parameter acquisition, the test cost of the BQ series battery is reduced, the reliability is high, the HMI communication module is connected with the display device, a computer or the like is not needed as a test tool, user operation is more simple and convenient, and test efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor, and the drawings are as follows:

[0021] Figure 1 is a circuit principle diagram of the controller of the battery test circuit of the embodiment of the present application;

[0022] Figure 2 is a circuit principle diagram of the I2C communication module of the battery test circuit of the embodiment of the present application;

[0023] Figure 3 is a circuit principle diagram of the HMI communication module of the battery test circuit of the embodiment of the present application;

[0024] Figure 4 is a circuit principle diagram of the voltage stabilizing module of the battery test circuit of the embodiment of the present application;

[0025] Figure 5 is a circuit principle diagram of the thermocouple conversion module of the battery test circuit of the embodiment of the present application;

[0026] Figure 6It is the circuit principle diagram of the voltage detection module of the battery test circuit of the utility model embodiment. DETAILED DESCRIPTION

[0027] In order to make the utility model's purpose, technical scheme and advantage more clearly, the various exemplary embodiments to be described below will be referred to the corresponding drawings, these drawings constitute a part of exemplary embodiments, wherein the various exemplary embodiments possibly adopted to realize the utility model are described.The same numerals in different drawings represent the same or similar elements unless otherwise indicated.The implementation described in the following exemplary embodiments does not represent all the implementations consistent with the present disclosure.It should be understood that they are only examples of processes, methods and devices, etc.consistent with some aspects of the utility model disclosed as detailed in the appended claims, and other implementations can be used, or structural and functional modifications can be made to the implementations listed herein, without departing from the scope and essence of the utility model.

[0028] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation, structure and operation.The terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.The term "a plurality of" means two or more.The terms "connected", "connected" should be broadly understood, for example, it can be fixed connection, detachable connection, integral connection, mechanical connection, electrical connection, communication connection, direct connection, indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements.The term "and / or" includes any and all combinations of one or more related listed items.The above terms in the utility model can be understood according to the specific meaning of the specific circumstances for those skilled in the art.

[0029] In order to illustrate the technical scheme of the utility model, the following will be described by specific embodiments, only the part related to the utility model embodiments is shown.

[0030] Embodiment one:

[0031] As Figure 1As shown, the utility model provides a kind of battery test circuit, including controller, voltage stabilizing module, I2C communication module, HMI communication module, voltage stabilizing module, I2C communication module, HMI communication module are connected with controller.Control chip signal of controller is APT32F103, including 20 pins;APT32F103 is the 32-bit high-performance high reliability single-chip microcomputer based on RISC-V CPU kernel developed by APT microelectronics, widely used in industrial control, intelligent household appliances and other applications, with advanced process technology, powerful processing performance, abundant storage resources, excellent communication ability, high-precision ADC function, reliable stability and excellent power consumption management and other parameter advantages, to realize the reliable battery test circuit of low cost.Therefore, voltage stabilizing module is used to provide stable working voltage to controller, to ensure the stable work of test circuit.I2C communication module is connected with test battery through I2C communication protocol, and I2C communication protocol is a kind of low-speed serial communication bus protocol, mainly used to connect microcontroller and its peripheral equipment, to obtain the working parameter of test battery based on controller.HMI communication module is connected with display device, and the type of display device can be selected as required, such as various types of display, television and the like, so as not to be limited to existing computer, and various working states and data of test battery are driven to be displayed by controller, to realize the test of battery.The embodiment is tested by APT32F103 chip to control and obtain test parameter, reduces the test cost of BQ series battery, and has high reliability, and HMI communication module is connected with display device, and computer and other upper computers are no longer needed as test tool, user operation is more simple and convenient, and test efficiency is higher.

[0032] As an optional embodiment, as shown in Figure 2 As shown, the chip model of I2C communication module is ISO1540, and ISO1540 is a low-power bidirectional isolator compatible with I2C interface, with two isolated bidirectional channels, respectively applied to clock line and data line, supporting to integrate a completely isolated I2C interface into small package, to reduce the volume of test circuit.I2C communication module is connected with test battery through I2C_SDA_C pin and I2C_SCKC pin, and is connected with test battery through connector J2, to facilitate electrical connection with test battery, for obtaining the working parameter of test battery;I2C communication module is connected with controller through I2C_SDA pin and I2C_SCK pin.

[0033] As an optional embodiment, as shown in Figure 3As shown, the HMI communication module includes an isolation chip 121U31 and a communication chip RS485. The isolation chip 121U31 is connected with the controller through the pTX pin and the pRX pin, and is used for signal isolation to ensure the stability and integrity of the display data transmission required by the display device. The RO pin and the DI pin of the communication chip RS485 are connected with the VIB pin and the VOA pin of the isolation chip 121U31 respectively. The communication chip RS485 is connected with the display device through the connector J1. The RS485 protocol is a communication protocol widely used in the industry of industrial control, power communication and intelligent instrument, which is convenient for connecting various types of external display devices. The battery test circuit further includes a display enable module, which is connected with the controller through the 485_EN pin and connected with the X1 pin of the communication chip RS485 through the optocoupler element. When the 485_EN pin and the X1 pin are high level, the optocoupler element is turned on, the display indicator light is turned on, and the display enable module starts to work.

[0034] As an optional implementation, as shown in Figure 4 As shown, the voltage stabilizing module is used for converting the 12V DC power supply into stable 3.3V DC power. The LDO chip of the voltage stabilizing module is LD1117. LD1117 is a high-performance three-terminal output low-dropout linear regulator, which can effectively protect against over-temperature and over-current within the rated operating temperature range, and has a wide range of applications. It can provide a fixed voltage output of 3.3V, which is convenient for the chip of the controller in the embodiment to maintain a stable working state.

[0035] As an optional implementation, as shown in Figure 5 As shown, the battery test circuit further includes a thermocouple conversion module for converting the working temperature of the test battery into a digital signal, thereby realizing the detection of the working temperature of the test battery. The chip type of the thermocouple conversion module is MAX31855. AX31855 is a thermocouple-to-digital output converter. The converter has a built-in 14-bit analog-to-digital converter and a cold-end compensation function, which can convert K, J, N, T or E type thermocouple signals into digital quantities, thereby realizing reliable detection of the temperature of the test battery. The thermocouple conversion module is connected with the controller through the SPI_CLK pin, the SPI_CS pin and the SPI_MISO pin. The thermocouple conversion module is connected with the test battery through the connector J3, thereby realizing the function of temperature detection.

[0036] As an optional implementation, as shown in Figure 6 As shown, the battery test circuit further includes a voltage detection module for detecting the voltage parameter of the test battery. The voltage detection module is connected with the test battery through the connector J5 and connected with the controller through the AD V pin, thereby realizing the connection between the voltage detection module, the controller and the test battery.

[0037] As an optional implementation, as shown in Figure 1 The battery test circuit further comprises a debugging module, the debugging module is connected with the controller through the SWCK pin and the SWDA pin, the debugging module is connected with the upper computer through the connector J4, different test modes are set, and test parameters of the test battery are set according to requirements, and the like, so that the applicability of the circuit is improved.

[0038] As an optional implementation, as shown in Figure 1 The battery test circuit further comprises an indicator light module, the indicator light module is connected with the controller through the PA12 pin, the indicator light module is turned on when the PA12 pin is at a high level, and the indicator light module plays a reminding role. The high level of the PA12 pin is set according to requirements, for example, when the test battery is connected with the controller, the PA12 pin is a high level signal, so that the user can pay attention to the working state of the circuit at any time during the test.

[0039] Embodiment two:

[0040] A battery test device comprises the battery test circuit of embodiment one. The battery test device controls the test process through the APT32F103 chip, reduces the test cost, has high reliability, and is connected with the display device through the HMI communication module, so that the computer and the like are no longer needed as a test tool, the user operation is more simple and convenient, and the test efficiency is higher.

[0041] The embodiment is only a specific example, and does not mean that the utility model is only in this implementation mode.

[0042] The above is only a preferred embodiment of the utility model, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and range of the utility model. In addition, the features and embodiments can be modified to adapt to specific conditions and materials under the guidance of the utility model without departing from the spirit and range of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the protection range of the utility model.

Claims

1. A battery test circuit, characterized by, The battery test circuit comprises a controller, a voltage stabilizing module, an I2C communication module and an HMI communication module, wherein the voltage stabilizing module, the I2C communication module and the HMI communication module are connected with the controller, and the chip signal of the controller is APT32F103; the voltage stabilizing module is used for providing stable working voltage for the controller; the I2C communication module is connected with a test battery through an I2C communication protocol, and working parameters of the test battery are acquired based on the controller; the HMI communication module is connected with a display device, and the working parameters of the test battery are displayed by the controller.

2. The battery test circuit of claim 1, wherein, The chip model of the I2C communication module is ISO1540, the I2C communication module is connected with the test battery through an I2C_SDA_C pin and an I2C_SCKC pin, and is connected with the test battery through a connector J2, and is used for acquiring the working parameters of the test battery; the I2C communication module is connected with the controller through an I2C_SDA pin and an I2C_SCK pin.

3. The battery test circuit of claim 1, wherein, The HMI communication module comprises an isolation chip 121U31 and a communication chip RS485; the isolation chip 121U31 is connected with the controller through a pTX pin and a pRX pin in a serial port mode, and a RO pin and a DI pin of the communication chip RS485 are connected with a VIB pin and a VOA pin of the isolation chip 121U31 respectively; the communication chip RS485 is connected with a display device through a connector J1.

4. The battery test circuit of claim 3, wherein, The battery test circuit further comprises a display enabling module, wherein the display enabling module is connected with the controller through a 485_EN pin, and is connected with an X1 pin of the communication chip RS485 through a photo-coupling element.

5. The battery test circuit of claim 1, wherein, The voltage stabilizing module is used for converting a 12V direct current power supply into a stable 3.3V direct current, and the LDO chip model of the voltage stabilizing module is LD1117.

6. The battery test circuit of claim 1, wherein, The battery test circuit further comprises a thermocouple conversion module, which is used for converting the working temperature of the test battery into a digital signal, and the chip model of the thermocouple conversion module is MAX31855; the thermocouple conversion module is connected with the controller through an SPI_CLK pin, an SPI_CS pin and an SPI_MISO pin, and is connected with the test battery through a connector J3.

7. The battery test circuit of claim 1, wherein, The battery test circuit further comprises a voltage detection module, which is connected with the test battery through a connector J5, and is connected with the controller through an AD V pin.

8. The battery test circuit of claim 1, wherein, The battery test circuit further comprises a debugging module, which is connected with the controller through an SWCK pin and an SWDA pin, and is connected with an upper computer through a connector J4.

9. The battery test circuit of claim 1, wherein, The battery test circuit further comprises an indicator light module, which is connected with the controller through a PA12 pin, and is turned on when the PA12 pin is in a high level.

10. A battery testing apparatus, characterized by, The battery test circuit comprises the battery test circuit according to any one of claims 1-9.

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