New energy automobile electrical safety inspection equipment
By introducing an MCU clock and a synchronous sampling module into the new energy vehicle battery testing system, the problem of testing parameters at different time points was solved, achieving synchronous data acquisition and improved accuracy, thus ensuring the reliability of fault diagnosis.
Patent Information
- Application Number
- CN202520319470.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-26
AI Technical Summary
In existing new energy vehicle battery testing technologies, the parameters are not acquired at the same time, which affects the accuracy of testing and subsequent data analysis and fault diagnosis.
The MCU clock provides a reference time for each sensing module to control synchronous detection. Data synchronous acquisition is achieved through a synchronous sampling module and an AD converter. The crystal oscillator and PCF8563 chip are used as clock sources. Combined with a temperature compensation network and an active sampling module, it ensures that each detection module acquires data at the same time point.
It enables synchronous detection and data acquisition of various parameters, improving the accuracy of detection and the reliability of subsequent fault diagnosis.
Smart Images
Figure CN223742645U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to new energy automobile test field especially, and it relates to a new energy automobile electric safety inspection equipment. BACKGROUND
[0002] New energy automobile battery test inspection, for example, the voltage, temperature, health state etc. of battery mainly rely on the information processing function's chip such as collection equipment, sensor, singlechip and PLC, can carry out information automatic collection, chip threshold comparison, and through display screen direct indication each parameter, and the prior art is through polling access detection data, but obtains each parameter of the same time point collection, not only influence the accuracy of detection, but also is crucial to subsequent data analysis, fault diagnosis
[0003] Therefore, the utility model provides a new energy automobile electric safety inspection equipment, and the clock of MCU provides reference time for each sensing module, controls synchronous detection, and information after detection is synchronized into MCU. SUMMARY
[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a new energy automobile electric safety inspection equipment, and the clock of MCU provides reference time for each sensing module, controls synchronous detection, and information after detection is synchronized into MCU, and each parameter of the same time point collection can be obtained.
[0005] The technical solution of the utility model is as follows: including: detection module, MCU hardware chip, display screen, display screen driver, the detection module is connected MCU hardware chip, MCU hardware chip is connected display screen driver, and display screen driver is connected display screen, still including clock module, synchronous sampling module, clock module is connected MCU hardware chip, and synchronous sampling module and MCU hardware chip are mutually connected, and synchronous sampling module and detection module are mutually connected.
[0006] Preferably, the clock module is composed of a crystal oscillator and a PCF8563 chip.
[0007] Preferably, the clock module further includes a temperature compensation network.
[0008] Preferably, the temperature compensation network includes a thermistor disposed at the MCU hardware chip, and further includes a voltage sensor, a current sensor, a working voltage and current signal of the MCU hardware chip, a temperature signal detected by the thermistor, and a power consumption signal calculated by a multiplier connected to a temperature superposition circuit.
[0009] Preferably, the utility model further includes an active sampling module, the detection module is connected to the active sampling module, and the active sampling module is connected to the MCU hardware chip.
[0010] This invention has the following advantages: The clock module replaces the conventional clock circuit composed of capacitors and crystal oscillators, and adopts a crystal oscillator and PCF8563 chip as the core components to provide a precise clock source. This serves as a reference time and is connected to each detection module. Each detection module performs time calibration and detection according to the reference time. The clock controls the working switches of the sensors and sampling devices in the detection module, and controls synchronous detection. The synchronous sampling module uses a synchronous acquisition card to replace the AD conversion. Each detection module corresponds to one channel, and each channel corresponds to one sample-and-hold circuit, which can realize synchronous data acquisition and time-division transmission. The internal AD converter quantizes each channel's hold circuit separately, and after analog-to-digital conversion, it enters the MCU hardware chip, which can acquire various parameters collected at the same time point. Attached Figure Description
[0011] Figure 1 This is a general structural diagram of the present invention;
[0012] Figure 2 This is the circuit schematic diagram of the clock module of this utility model.
[0013] Figure 3 This is a schematic diagram illustrating the principle of the temperature-compensated crystal oscillator of this invention.
[0014] Figure 4 This is a schematic diagram of the temperature compensation network circuit of this utility model.
[0015] Figure 5 This is a circuit schematic diagram of the active sampling module of this utility model.
[0016] Figure 6 This is a schematic diagram of the MCU hardware chip, display screen, and display screen driver circuit of this utility model. Detailed Implementation
[0017] For the purposes of this utility model, the foregoing and other technical contents, features and effects are described in conjunction with the appendix below. Figures 1 to 6 The detailed description of the embodiments will make this clear. All structural details mentioned in the following embodiments are based on the accompanying drawings.
[0018] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.
[0019] Example 1: A new energy vehicle electrical safety testing equipment includes: a detection module, an MCU hardware chip, a display screen, and a display screen driver. The detection module includes a temperature detection module, a voltage detection module, an insulation resistance detection module, and a potential equalization detection module, all connected to the MCU hardware chip. The MCU hardware chip is an STC15F2K60S2, which is the data processing core used for receiving data, data analysis, fault diagnosis, and driving the display. It includes a clock reset and a program interface required for operation. It receives the detection data through polling, and after AD conversion, it is connected to the LCD display screen through the display screen driver HT1621 to display the detection parameter data and threshold comparison results. It can also construct multi-parameter electrical... The battery assessment model, such as weighted fusion calculation of various parameters, yields the battery safety assessment result. Since this application protects the MCU clock to provide a reference time for each sensing module, control synchronous detection, and after detection, the information is synchronously entered into the MCU to obtain the parameters collected at the same time point, which is the processing of the front-end signal, not the specific data analysis and fault diagnosis process of the back-end information, so it will not be described in detail here. It also includes a clock module and a synchronous sampling module. The clock module replaces the conventional clock circuit composed of capacitors and crystal oscillators, and takes a crystal oscillator and PCF8563 chip as the core components. The PCF8563 chip is powered by dual power supplies. The synchronous sampling module uses a synchronous acquisition card to replace the AD conversion. Specifically, the ART PCI2008 can be used, which is a 16-channel synchronous 12-bit analog input acquisition card. Each detection module corresponds to one channel, and each channel corresponds to a sample-and-hold circuit, which can realize synchronous data acquisition and time-division transmission. The internal AD converter will quantize the hold circuit of each channel separately, and after analog-to-digital conversion, it enters the MCU hardware chip to obtain the parameters collected at the same time point.
[0020] Example 2, based on Example 1, the clock module is composed of a crystal oscillator and a PCF8563 chip as its core components, such as... Figure 2 As shown, the PCF8563 chip is powered by a dual power supply, from the MCU hardware chip power supply and the backup battery power supply, to provide a precise clock source. This clock source serves as a reference time and is connected to each detection module. Each detection module performs time synchronization and detection according to the reference time. Specifically, a clock (or the same crystal oscillator and PCF8563 chip as described above) is set at the detection module and synchronized with the reference time at regular intervals. The clock controls the on / off operation of the sensors and sampling devices in the detection module and controls synchronous detection. To ensure the accuracy of the clock module and reduce the temperature effect of the crystal oscillator, a temperature compensation network is used to improve the temperature-frequency characteristics of the temperature-compensated crystal oscillator, improve the frequency accuracy of the oscillator, and thus improve the accuracy of the clock.
[0021] In Example 3, based on Example 2, the temperature compensation network includes a thermistor installed at the MCU hardware chip to detect the temperature of the MCU hardware chip. It also includes the operating voltage and current signals of the MCU hardware chip detected by voltage and current sensors. The power consumption signal is calculated by a multiplier from the temperature, voltage, and current signals detected by the thermistor. The power consumption signal and temperature are combined by a temperature superposition circuit to calculate the total temperature, which is then fed into the MCU hardware chip. The MCU hardware chip outputs a compensation voltage based on the existing VT curve and applies it to the varactor diode DC1 to improve the temperature-frequency characteristics of the temperature-compensated crystal oscillator.
[0022] Example 4, based on Example 2, further includes an active sampling module. The detection module is connected to the active sampling module, which in turn is connected to the MCU hardware chip. The following description uses a temperature detection module as an example to detail the structure and operation of the active sampling module; this also applies to other detection modules, such as... Figure 5 As shown, when the battery temperature information is initially judged to be abnormal (-10℃ to 50℃ is normal), the setting here is below 0℃ and above 40℃ as the initial judgment of abnormality. At this time, the bidirectional Zener diode Z50 breaks down, the field-effect transistor Q1 works, the power supply is supplied to the crystal oscillator IC1, and it starts working. The integrator composed of the operational amplifier AR50 as the core calculates the temperature change rate, changes the operating frequency of the crystal oscillator IC1, and changes the sampling switch of the sample-and-hold circuit to actively transmit data to the MCU hardware chip, so as to obtain the emergency abnormal information in a timely manner.
[0023] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A new energy vehicle electrical safety inspection equipment, comprising: The detection module, the MCU hardware chip, the display screen, and the display screen driver are connected, the clock module is connected with the MCU hardware chip, the synchronous sampling module is connected with the MCU hardware chip, and the synchronous sampling module is connected with the detection module.
2. The electric safety inspection equipment for new energy vehicles according to claim 1, characterized in that: The clock module is composed of a crystal oscillator and a PCF8563 chip.
3. The electric safety inspection equipment for new energy vehicles according to claim 2, characterized in that: The clock module further comprises a temperature compensation network.
4. The electric safety inspection equipment for new energy vehicles according to claim 3, characterized in that: The temperature compensation network comprises a thermistor arranged at the MCU hardware chip, a voltage sensor, and a current sensor for detecting the working voltage and current signals of the MCU hardware chip, and a temperature signal detected by the thermistor.
5. The electric safety inspection equipment for new energy vehicles according to claim 1, characterized in that: The detection module further comprises an active sampling module connected with the MCU hardware chip.
6. The electric safety inspection equipment for new energy vehicles according to claim 1, characterized in that: The detection module comprises a temperature detection module, a voltage detection module, an insulation resistance detection module, and a potential equalization detection module.
7. The new energy vehicle electrical safety inspection equipment according to any one of claims 1-6, characterized in that: The MCU hardware chip is an STC15F2K60S2. The display screen driver is an HT1621. The display screen is an LCD display screen.