Battery wire harness detection circuit

Abstract

The utility model discloses a battery wire harness detection circuit comprising a detection device, the detection device comprises a connector, a sampling module, a power supply module and a control module, the connector is connected with a battery wire harness to be detected, and the other end of the battery wire harness to be detected is also connected with a battery pack; the sampling module and the power supply module are connected with the connector assembly, and the sampling module and the power supply module are respectively connected with the control module. By implementing the circuit provided by the utility model, an external power supply is not needed for power supply, the detection cost is reduced, the detection efficiency and reliability are improved, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of energy storage system technology, and in particular to a battery harness detection circuit. Background Technology

[0002] Battery harnesses are critical components in electric vehicles, energy storage systems, and portable electronic devices, playing a vital role in connecting battery modules, battery management systems, and other electronic equipment. Since battery harnesses directly impact the stable operation of the battery system, their safety and reliability are paramount. Faults in the battery harness, such as short circuits, open circuits, poor connections, or misconnections, can lead to battery system failure and even more serious safety hazards, such as fire, electric shock, or equipment damage. Therefore, effective testing of battery harnesses to ensure their high efficiency, stability, and safety during use is a crucial aspect of battery system design and maintenance.

[0003] To ensure the safety and reliability of battery harnesses, existing testing methods generally include multiple stages such as electrical performance testing, physical connection inspection, and structural integrity testing. These methods typically rely on dedicated testing equipment, aiming to quickly and accurately identify potential problems in battery harnesses. However, these traditional testing methods also face several challenges, particularly regarding the cost, efficiency, and reliability of the testing equipment. First, many existing testing technologies require an external power source. To complete the testing task, battery harness testing equipment needs an external power supply, which not only increases system complexity but also incurs additional costs. In some specific application scenarios, the need for an external power source may not be suitable, especially for portable devices or some small energy storage systems, where this design may affect the overall convenience and adaptability of the system. Furthermore, existing testing methods often rely on complex electrical testing equipment, which requires an external power source to operate. This prevents battery harness testing from being performed under conditions where the battery itself is powered, limiting its application in certain special situations. Moreover, this reliance on external power sources often makes the testing process cumbersome, increases operational difficulty, and may lead to a decrease in testing efficiency. Secondly, existing testing technologies are costly, especially in production environments requiring frequent battery harness testing, where equipment and operating costs can be a significant obstacle. In industries where cost control is crucial, high testing fees may limit the widespread application of this technology, thereby impacting production efficiency and product quality. Finally, existing testing methods often focus on single aspects, making it difficult to comprehensively assess the overall performance of battery harnesses. For example, electrical performance testing may fail to effectively identify problems in physical connections, or structural integrity testing may not fully reflect potential electrical continuity issues. A single testing method cannot achieve comprehensive monitoring of battery harnesses, potentially overlooking some potential fault points and affecting the comprehensiveness and accuracy of the testing.

[0004] Therefore, it is necessary to design a new circuit that eliminates the need for an external power supply, reduces detection costs, improves detection efficiency and reliability, and has a wide range of applications. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a battery harness detection circuit.

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is achieved through the following technical solution: providing a battery harness detection circuit, comprising: a detection device, the detection device including a connector, a sampling module, a power module and a control module, the connector being connected to the battery harness to be tested, and the other end of the battery harness to be tested being connected to a battery pack; the sampling module and the power module being connected to the connector, and the sampling module and the power module being respectively connected to the control module.

[0007] A further technical solution includes a display module, which is connected to both the power module and the control module.

[0008] The further technical solution is as follows: the power module includes a buck converter and a low dropout regulator, the buck converter is connected to the connector, and the low dropout regulator is connected to the buck converter.

[0009] The further technical solution is as follows: the sampling module includes a voltage divider circuit.

[0010] The further technical solution is as follows: the display module includes LED lights.

[0011] The further technical solution is as follows: the buck converter includes a DC-DC chip U5, and the DC-DC chip U5 is connected to the connector.

[0012] The further technical solution is as follows: the DC-DC chip U5 is connected to the connector through a diode competition circuit.

[0013] The further technical solution is as follows: the low dropout regulator includes an LDO chip UPW1, and the LDO chip UPW1 is connected to the control module.

[0014] A further technical solution is as follows: a diode DPW1 is connected between the connector and the DC-DC chip U5.

[0015] A further technical solution is as follows: a TVS diode D35 and a filter capacitor CPW24 are also connected between the diode DPW1 and the DC-DC chip U5. The TVS diode D35 is connected to the filter capacitor CPW24, and one end of the TVS diode D35 and the other end of the filter capacitor CPW24 are respectively connected to the diode DPW1 and the DC-DC chip U5.

[0016] The advantages of this invention compared to existing technologies are as follows: This invention connects the battery harness to be tested to the testing equipment via a connector, utilizing the battery itself for power, eliminating the need for an external power source; the sampling module and power module acquire voltage signals from the battery harness, and the control module processes and judges the data; the control module determines the battery harness status based on the acquired voltage value and displays abnormal information via LED indicators; this design simplifies the equipment structure, reduces hardware costs, and improves testing efficiency and reliability; because it does not rely on an external power source, this circuit is suitable for various battery harnesses, has good compatibility, and is widely applicable.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic block diagram of a battery harness detection circuit provided for an embodiment of this utility model;

[0020] Figure 2 A specific circuit diagram of a battery harness detection circuit provided for an embodiment of this utility model;

[0021] Explanation of the markings in the image:

[0022] 10. Testing equipment; 11. Connectors; 12. Sampling module; 13. Power module; 14. Control module; 15. Display module; 20. Battery pack. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] Battery harnesses are critical components in electric vehicles, energy storage systems, and portable electronic devices, directly impacting the safety and stability of battery systems. Existing testing methods include electrical performance, physical connectivity, and structural integrity testing, but these methods suffer from high equipment costs, reliance on external power sources, and low efficiency. External power requirements increase system complexity, affecting adaptability to portable and small devices. Complex electrical testing equipment makes the testing process cumbersome and reduces efficiency. High testing costs limit the application of the technology in low-cost industries. Existing testing methods often focus on a single aspect, making it difficult to comprehensively assess the overall performance of battery harnesses and potentially overlooking potential fault points.

[0028] Therefore, this utility model provides a battery harness detection circuit that eliminates the need for an external power supply, reduces detection costs, improves detection efficiency and reliability, and has a wide range of applications.

[0029] Specifically, the detection circuit eliminates the need for an external power supply by using a battery connection harness, thus improving system independence and reliability. A buck converter and low-dropout regulator (such as a DC-DC chip and an LDO chip) are employed to stabilize the power supply, ensuring normal operation under varying voltage conditions and avoiding additional power costs. The sampling module 12 is integrated with the control module 14, enabling real-time monitoring of the battery harness status through the sampling circuit, reducing hardware components and improving detection efficiency. LEDs are used as the display module 15, providing intuitive status indication, reducing the complexity and cost of the display system while enhancing visualization. Protection circuits, including diodes, TVS diodes, and filter capacitors, ensure system stability and reliability under high voltage or current fluctuations, preventing damage to sensitive components. The connector 11 connects directly to the battery harness, ensuring the detection circuit can be widely adapted to different types of battery harnesses, enhancing system versatility and adaptability. By simplifying the circuit structure and reducing external dependencies, the overall design complexity is reduced, making equipment maintenance and use easier and saving costs. The adoption of digital control and automated monitoring improves the efficiency and accuracy of the testing process, avoids manual intervention, and enhances work stability and overall production efficiency.

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] Please see Figure 1 The aforementioned battery harness detection circuit includes: a detection device 10, which includes a connector 11, a sampling module 12, a power module 13, and a control module 14. The connector 11 is connected to the battery harness to be tested, and the other end of the battery harness to be tested is also connected to a battery pack 20. The sampling module 12 and the power module 13 are connected to the connector 11, and the sampling module 12 and the power module 13 are respectively connected to the control module 14.

[0032] In one embodiment, please refer to Figure 1 The aforementioned battery harness detection circuit also includes a display module 15, which is connected to the power module 13 and the control module 14 respectively.

[0033] Connector 11 is the entry point of the battery harness detection circuit, through which the battery harness under test is connected to the detection device 10. Connector 11 typically has multiple contact points, each corresponding to a wire in the battery harness, enabling the electrical connection of the battery harness.

[0034] The sampling module 12 monitors the battery voltage connected to the battery harness under test in real time and converts the battery voltage into a processable signal through voltage division or other methods. The module typically operates by: processing the battery voltage using a voltage divider circuit to convert it to a range suitable for digital processing; and then sending the battery voltage to the control module 14 for further processing via an AD conversion circuit.

[0035] Power module 13 is responsible for drawing energy from the battery harness to power other modules in the circuit. In this design, power module 13 converts the battery voltage into a voltage suitable for powering the DC-DC converter chip (U5) via a diode-competing circuit. Through the DC-DC chip, power module 13 can output a stable 5V voltage to provide power to other parts of the system, such as LEDs and control module 14.

[0036] The core of the control module 14 is a microcontroller, which acquires battery voltage information from the sampling module 12 and detects the state of the battery harness according to predetermined judgment logic. The microcontroller determines whether there is an abnormality in the battery harness by reading the AD value of the battery voltage. Specific judgment methods include:

[0037] Determine if the battery voltage is within a reasonable range; determine if there are any abnormalities such as short circuits, open circuits, poor contact, or incorrect sequence.

[0038] Based on the microcontroller's judgment, the control module 14 determines the state of the LEDs, i.e., the display module 15. If all AD values ​​are within a reasonable range, the system will light up a green LED, indicating that the battery harness is normal; if the battery voltage of a certain harness is abnormal, a red LED will light up, indicating that there is a problem with that harness.

[0039] In one embodiment, please refer to Figure 2 A diode competition circuit is connected between the battery harness to be tested and the connector 11.

[0040] Specifically, the diode competition circuit includes several diode groups, each including a first diode and a second diode. The anode of the first diode is connected to the battery harness under test, and the cathode of the first diode is connected to the power supply pin of the power module 13. The cathode of the second diode is connected to the battery harness under test, and the anode of the second diode is grounded. Each battery pack 20 is connected to one diode group through the battery harness under test.

[0041] Specifically, the main function of the diode competition circuit is to ensure that the testing device 10 can obtain stable input energy from the battery under test to power the power module. The purpose of the diode competition circuit is to prevent the battery from supplying power to the power module under abnormal conditions, ensuring normal testing is not due to voltage instability. Specifically, the diode competition circuit achieves voltage sampling and power management of the battery harness by selectively conducting the battery harness voltage.

[0042] Each battery pack 20 is connected to a diode group via the battery harness under test. The diode group consists of two diodes (a first diode and a second diode), wherein: the positive terminal of the first diode is connected to the battery harness under test, and the negative terminal is connected to the power module 13 via connector 11; the negative terminal of the second diode is connected to the battery harness under test, and the positive terminal is grounded.

[0043] When the battery voltage on the battery harness under test is normal, the voltage at the positive terminal of the first diode will be higher than the voltage at its negative terminal, thus turning the first diode on. The battery voltage is transmitted to connector 11 and power module 13 through this diode. The positive terminal of the second diode is grounded, and the negative terminal is connected to the battery harness under test. When the voltage on the battery harness under test is low, the second diode will turn on, guiding the battery voltage to ground, thereby avoiding negative impacts of the battery voltage on the circuit.

[0044] The function of the competing circuit diode is to prevent the battery from supplying power to the power module even under abnormal conditions, ensuring that the equipment can perform normal testing.

[0045] The diode competition circuit establishes a current-directing path between the power module 13 and the battery harness under test, preventing possible reverse current or voltage errors between the power module 13 and the battery harness. Through the coordinated operation between the battery voltage and the power module 13, the diode group ensures the stability and reliability of the circuit.

[0046] The diode array, through its unidirectional conductivity, prevents the battery harness voltage from having a reverse effect or interfering with the power module 13. When the battery voltage is low or reverse current occurs, the second diode conducts, directing the current to ground without affecting the stable operation of the power module 13. The diode competition circuit effectively prevents abnormal battery voltage (e.g., too low or too high) from affecting other parts of the circuit, reducing the risk of circuit damage. For example, when the battery voltage is abnormal, the diode can guide the abnormal current away from entering the circuit, thereby protecting other critical components such as the MCU and LEDs. The diode competition circuit ensures that the battery voltage is accurately transmitted to the MCU for sampling, while avoiding erroneous data transmission caused by power supply voltage fluctuations or battery voltage instability. This allows the system to detect the voltage state of the battery harness in real time and accurately. This design utilizes the unidirectional conductivity of diodes, avoiding complex voltage control circuits and reducing unnecessary circuit components. The diode array, with its simple structure, can perform battery voltage selection and power management functions, thus simplifying circuit design and improving circuit reliability. Because the diode competition circuit can automatically adjust according to changes in battery voltage and power supply voltage, even if some battery harnesses malfunction (e.g., short circuit, open circuit, poor contact, or missequence), the purpose of the diode competition circuit is to ensure that the equipment can still perform normal detection even under abnormal harness conditions. The system can also maintain power supply voltage stability through diode conduction control, thereby improving the system's fault tolerance. This circuit effectively prevents battery harness voltage fluctuations or incorrect transmission from causing circuit malfunctions, thus ensuring the long-term stable and reliable operation of the battery harness detection system.

[0047] By designing a diode-competitive circuit, the battery harness detection system can be ensured to operate stably and accurately even when the battery voltage changes. The selective conduction characteristics of the diode group provide a reliable guarantee for the sampling of the battery harness voltage, avoiding the influence of power supply interference and reverse current, thereby improving the stability, reliability, and safety of the circuit. Furthermore, this design simplifies the circuit structure, reduces system cost, and enhances the system's fault tolerance to abnormal battery voltage.

[0048] In one embodiment, please refer to Figure 2 The power module 13 mentioned above includes a buck converter and a low-dropout regulator. The buck converter is connected to the connector 11, and the low-dropout regulator is connected to the buck converter.

[0049] In one embodiment, please refer to Figure 2 The aforementioned sampling module 12 includes a voltage divider circuit.

[0050] In one embodiment, please refer to Figure 2 The aforementioned display module 15 includes LED lights.

[0051] In one embodiment, please refer to Figure 2 The aforementioned step-down converter includes a DC-DC chip U5, which is connected to connector 11.

[0052] In one embodiment, please refer to Figure 2 The aforementioned low-dropout regulator includes an LDO chip UPW1, which is connected to the control module 14.

[0053] In this embodiment, the DC-DC chip U5 is of type H6203L, but is not limited to; the LDO chip UPW1 is of type TPL820F33-89TR, but is not limited to.

[0054] In one embodiment, please refer to Figure 2 A diode DPW1 is connected between the aforementioned connector 11 and the DC-DC chip U5.

[0055] In one embodiment, please refer to Figure 2 The aforementioned diode DPW1 and DC-DC chip U5 are also connected by a TVS diode D35 and a filter capacitor CPW24. The TVS diode D35 is connected to the filter capacitor CPW24, and one end of the TVS diode D35 and the other end of the filter capacitor CPW24 are respectively connected to the diode DPW1 and the DC-DC chip U5.

[0056] In addition, the VDD pin of DC-DC chip U5 is connected to resistor RPW3 and capacitor CPW13. The VFB pin of DC-DC chip U5 is connected to capacitor CPW13 via resistor RPW8. The VFB pin of DC-DC chip U5 is connected to diode DPW2 via resistor RPW6. The other end of diode DPW2 is connected between resistor RPW3 and the VDD pin of DC-DC chip U5. The other end of diode DPW2 is also connected to DC-DC converter via inductor LPW1 and resistor RPW2. The DC chip U5's CS pin; wherein, the DC-DC chip U5's VSS pin is grounded through the Zener diode DPW3, and the aforementioned inductor LPW1 is grounded through capacitor CPW10 and resistor RPW7, the aforementioned LDO chip UPW1's VIN pin is connected to capacitor CPW2, and capacitor CPW2 is connected to the LDO chip UPW1's VSS pin; the LDO chip UPW1's VOUT pin is connected to the control module 14, and is also connected to the LDO chip UPW1's VSS pin through capacitor CPW3.

[0057] In this embodiment, the buck converter (DC-CDC chip U5): The DC-CDC converter is connected to the battery harness via connector 11, receives the voltage from the battery, and converts the battery voltage to the required low voltage (typically 5V). In this circuit, the function of the DC-CDC chip U5 is to convert the battery voltage into a stable voltage suitable for subsequent circuits through a diode-competitive circuit. Its working principle is to regulate the voltage by switching, converting a high voltage into a lower stable voltage.

[0058] Low dropout voltage regulator (LDO chip UPW1): The LDO chip UPW1 is connected to the DC-DC chip U5, receiving the stepped-down 5V voltage and further regulating it to 3.3V. The function of the LDO regulator is to ensure a stable and accurate output voltage to supply the microcontroller. LDO chips are typically used to provide low-noise, high-precision voltage output, making them particularly suitable for circuits requiring precise voltage control.

[0059] Sampling module 12 samples the battery voltage through a voltage divider circuit. The voltage divider circuit converts the battery voltage into a voltage range suitable for MCU processing. In this circuit, the voltage divider scales the battery voltage proportionally and converts it into a digital signal via an ADC (Analog-to-Digital Converter) for MCU processing. The MCU can analyze this digital signal (i.e., the AD value) to determine whether the battery voltage is within the normal range.

[0060] The display module 15 consists of LEDs used to indicate the status of the battery harness. The LEDs display the status of the battery harness. Based on the collected AD values, the MCU controls the LED status to represent the battery harness status. For example, when all AD values ​​are within a reasonable range, the green LED lights up, indicating that the harness is normal. When an AD value is outside the reasonable range, the red LED lights up, indicating that the corresponding harness has an abnormality (such as a short circuit, open circuit, poor contact, etc.).

[0061] Between the power module 13 and other circuits, there are some protection and connection circuits to improve the stability and reliability of the system.

[0062] Diode DPW1 is located between connector 11 and DC-DC chip U5, and serves to prevent reverse current from damaging the circuit. When the system is connected to a battery, the diode effectively prevents current from flowing in the reverse direction.

[0063] TVS (Transient Voltage Suppressor) diodes are used to protect circuits from voltage spikes and transient overvoltages. In this circuit, the D35 diode and the CPW24 filter capacitor work together to effectively absorb external voltage surges and prevent damage to the circuit.

[0064] The filter capacitor CPW24 works in conjunction with the TVS diode D35 for filtering and reverse connection protection, ensuring system stability.

[0065] The U5 DC-DC chip has multiple peripheral components connected to it to ensure its normal operation and stable output.

[0066] Resistor RPW3 and capacitor CPW13: These components are connected to the VDD terminal of the DC-DC chip U5 to stabilize the power input and filter high-frequency noise. The combination of resistors and capacitors also helps optimize the operating performance of the DC-DC chip and improve its efficiency.

[0067] The resistors and capacitors at the VFB terminal: The VFB terminal of the DC-DC chip U5 is used for feedback control to ensure stable output voltage. Resistors RPW6 and RPW8 and capacitor CPW13 are connected to the VFB terminal to form a feedback loop to regulate the output voltage.

[0068] Diode DPW2: DPW2, along with resistors RPW6 and RPW3, provides additional voltage protection and regulation. In this way, the DC-DC chip can more precisely regulate the output voltage.

[0069] Inductor LPW1 and resistor RPW2: Inductor LPW1 is used for filtering to remove voltage fluctuations; resistor RPW2 helps regulate the current so that the DC-DC chip U5 can operate smoothly.

[0070] Zener diode DPW3: Zener diode DPW3 ​​is grounded to protect the circuit from overvoltage and ensure a stable power input.

[0071] The peripheral circuitry of the LDO chip UPW1 is mainly used to ensure a stable 3.3V output voltage and to provide filtering.

[0072] Capacitors CPW2 and CPW3: These capacitors are used at the input and output terminals of the LDO chip UPW1 to reduce noise and stabilize the voltage. CPW2 is connected to the VIN terminal of the LDO chip, and CPW3 is connected to the VOUT terminal of the LDO chip, effectively filtering out high-frequency noise and ensuring a stable 3.3V output.

[0073] The VOUT terminal of the LDO chip UPW1: The VOUT terminal of the LDO chip is connected to the control module 14 to provide the required 3.3V power supply.

[0074] In this embodiment, the power module 13 effectively converts the battery voltage into stable 5V and 3.3V power supplies using the DC-DC chip U5 and the LDO chip UPW1, meeting the system's voltage requirements. A voltage divider circuit collects battery voltage information, the microcontroller determines the battery status, and LEDs indicate any abnormalities in the battery wiring harness. To ensure system stability and reliability, the circuit is also equipped with protection diodes, filter capacitors, and other components to ensure stable operation under various conditions.

[0075] In this embodiment, after the battery harness under test is connected to the connector 11 of the testing device 10, the battery voltage is transmitted to the DC-DC converter chip (U5) through the connected diode competition circuit.

[0076] The DC-DC converter chip (U5) converts the battery voltage and outputs a 5V voltage. This 5V voltage first powers the LED to indicate the detection status of the battery harness; secondly, some of the power is supplied to the low dropout regulator (LDO chip UPW1), which converts the voltage to 3.3V to provide a stable power supply for the control module 14.

[0077] The control module 14 samples the battery voltage through a voltage divider circuit and converts the sampling results into analog-to-digital (AD) values. These AD values ​​reflect the voltage state of the battery harness, and the control module 14 analyzes these sampled values.

[0078] The control module 14 determines whether the battery harness is in normal condition based on the collected AD values.

[0079] If all sampled AD values ​​are within a reasonable range, the control module 14 controls the LED to display green, indicating that the wiring harness is normal. If any sampled AD value exceeds the reasonable range, the control module 14 controls the corresponding LED to display red, indicating that the wiring harness is abnormal. Each wiring harness corresponds to one LED. If the LED of the third wiring harness is red, it indicates that the third wiring harness is abnormal; the status of other wiring harnesses is similar.

[0080] The detection device 10 in this embodiment requires no external power supply, as it is powered by the battery harness itself, simplifying the device structure and reducing costs. Through simple voltage sampling and logic control, it can accurately determine the state of the battery harness and identify common faults such as short circuits, open circuits, poor contact, and missequence. This solution is simple in design, has low hardware costs, and possesses strong stability and reliability. The battery harness detection circuit is suitable for different models and specifications of battery harnesses, exhibiting good compatibility.

[0081] In summary, this design, through its intelligent sampling and control system, enables efficient, low-cost, and reliable detection of battery harnesses, significantly improving their safety and fault diagnosis capabilities.

[0082] The aforementioned battery harness detection circuit connects the battery harness to be tested to the detection device 10 via connector 11, utilizing the battery itself for power, eliminating the need for an external power source. Sampling module 12 and power module 13 acquire voltage signals from the battery harness, and control module 14 processes and judges the data. Control module 14 determines the battery harness status based on the acquired voltage value and displays abnormal information via LED indicators. This design simplifies the device structure, reduces hardware costs, and improves detection efficiency and reliability. Because it does not rely on an external power source, this circuit is suitable for various battery harnesses, exhibiting good compatibility and a wide range of applications.

[0083] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A battery harness detection circuit, characterized by, The application relates to a battery detection device. The device comprises a connector, a sampling module, a power module and a control module, the connector is connected with a battery harness to be detected, the other end of the battery harness to be detected is also connected with a battery pack; the sampling module and the power module are connected with the connector, and the sampling module and the power module are respectively connected with the control module.

2. The battery harness detection circuit of claim 1, wherein, The device also comprises a display module, which is connected with the power module and the control module.

3. The battery harness detection circuit of claim 2, wherein, The power module comprises a step-down converter and a low-dropout voltage stabilizer, the step-down converter is connected with the connector, and the low-dropout voltage stabilizer is connected with the step-down converter.

4. The battery harness detection circuit of claim 1, wherein, The sampling module comprises a voltage dividing circuit.

5. The battery harness detection circuit of claim 2, wherein, The display module comprises an LED lamp.

6. The battery harness detection circuit of claim 3, wherein, The step-down converter comprises a DCDC chip U5, which is connected with the connector.

7. The battery harness detection circuit of claim 6, wherein, The DCDC chip U5 is connected with the connector through a diode competition circuit.

8. The battery harness detection circuit of claim 7, wherein, The low-dropout voltage stabilizer comprises an LDO chip UPW1, which is connected with the control module.

9. The battery harness detection circuit of claim 8, wherein, A diode DPW1 is connected between the connector and the DCDC chip U5.

10. The battery harness detection circuit of claim 9, wherein, A TVS diode D35 and a filter capacitor CPW24 are further connected between the diode DPW1 and the DCDC chip U5, the TVS diode D35 is connected with the filter capacitor CPW24, and one end of the TVS diode D35 and the other end of the filter capacitor CPW24 are respectively connected with the diode DPW1 and the DCDC chip U5.

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