Handheld detection device for electric vehicles and detection system thereof

Abstract

The application provides a handheld detection device of an electric vehicle and a detection system thereof, which is used for detecting a feedback signal of installation of a power battery on the electric vehicle. The detection device comprises a power supply, a first signal prompter and at least one first docking module. The first docking module is used for being electrically connected with any one position sensor on the electric vehicle, receiving an output signal of the position sensor and adjusting an output voltage according to the output signal. The first signal prompter is used for being electrically connected with an output end of the first docking module, receiving the output voltage of the first docking module and prompting whether the output signal of the position sensor is detected according to the output voltage. The detection device is independent of a vehicle detection circuit and is used for detecting the feedback signal of the installation of the power battery on the electric vehicle. The detection device can be electrically connected with any one position sensor on the electric vehicle and prompt whether the output signal of the position sensor is detected, so that the position sensor can be detected individually.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to a handheld testing device and testing system for electric vehicles. Background Technology

[0002] Currently, battery-swapping electric vehicles are becoming increasingly common because battery packs need to be frequently swapped at battery swapping stations to recharge the vehicles. According to national standards, a proper installation feedback signal is required after the battery swapping connector or battery pack is replaced. This feedback signal can be directly monitored by the vehicle's VCU (Vehicle Control Unit) or the battery pack's BMS (Battery Management System). As disclosed in existing technologies CN205097973U and CN105150820A, the proper installation feedback signal is directly monitored by the vehicle's VCU. However, electric vehicles typically have several sensors, each generating its own feedback signal. All sensors must be active simultaneously to output a feedback signal. The vehicle's VCU or battery pack's BMS can only detect the overall battery installation feedback signal; it cannot determine which sensor failed, thus making it impossible to pinpoint the specific location of the failure. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing vehicle VCU or battery pack BMS, which can only perform overall detection of the battery installation feedback signal and cannot pinpoint the specific failure location, and to provide a handheld detection device and detection system for electric vehicles.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] The present invention provides a handheld detection device for electric vehicles. The detection device is used to detect the feedback signal that the power battery of the electric vehicle is installed in place. The detection device includes a power supply, a first signal indicator and at least one first docking module.

[0006] The power supply terminal of the first docking module is electrically connected to the positive terminal of the power supply, and the ground terminal of the first docking module is electrically connected to the negative terminal of the power supply.

[0007] The first docking module is used to electrically connect with any position sensor on the electric vehicle, receive the output signal of the position sensor and adjust the output voltage according to the output signal;

[0008] The first signal indicator is electrically connected to the output terminal of the first docking module, receives the output voltage of the first docking module, and indicates whether the output signal of the position sensor is detected based on the output voltage.

[0009] In this solution, a handheld detection device is used to detect the feedback signal indicating that the power battery on the electric vehicle is installed in place. This detection device is independent of the whole vehicle detection circuit and is easy for staff to operate by hand. The detection device can receive the output signal of any position sensor on the electric vehicle and indicate whether the output signal of that position sensor has been detected, thus realizing the individual detection of each position sensor on the electric vehicle to pinpoint the specific failure location.

[0010] Preferably, the first docking module includes a first connector and a first control circuit;

[0011] The first connector is used for electrical connection with the position sensor and to receive the output signal of the position sensor;

[0012] The first control circuit is used to control the output voltage of the first docking module according to the output signal.

[0013] In this solution, the first control circuit controls the output voltage of the first docking module based on the output signal received by the first connector, thereby enabling individual detection of each position sensor on the electric vehicle. The control circuit is low in cost and highly reliable.

[0014] Preferably, the detection device includes a plurality of first docking modules connected in parallel with the power supply; the plurality of first docking modules each include a first connector of a different type to match and connect different types of position sensors.

[0015] In this solution, the detection device includes first connectors of different models, which enables matching connection with position sensors of different models, and has a wide range of applications.

[0016] Preferably, the position sensor includes a magnetic field sensor, a capacitive proximity sensor, an inductive proximity sensor, or a photoelectric proximity sensor.

[0017] Preferably, the magnetic field sensor includes a Hall sensor.

[0018] Preferably, the position sensor generates a locking signal in response to the locking mechanism of the power battery reaching a preset position; and / or,

[0019] The position sensor generates a battery swapping signal in response to the battery swapping device reaching a preset position.

[0020] In this solution, the locking signal and / or battery swapping signal are detected by a position sensor, which has high detection accuracy, good real-time performance and low cost.

[0021] Preferably, the installation in place signal detection device further includes a second signal indicator and at least one second docking module;

[0022] The power supply terminal of the second docking module is electrically connected to the positive terminal of the power supply, and the ground terminal of the second docking module is electrically connected to the negative terminal of the power supply.

[0023] The second docking module is used to electrically connect with the position sensor assembly of the electric vehicle. The position sensor assembly is formed by connecting multiple position sensors through a bracket wiring harness. The second docking module receives the output signal of the position sensor assembly and adjusts the output voltage according to the output signal.

[0024] The second signal indicator is electrically connected to the output terminal of the second docking module, receives the output voltage of the second docking module, and indicates whether the output signal of the position sensor assembly is detected based on the output voltage.

[0025] In this solution, the detection device receives the output signal of the position sensor assembly on the electric vehicle and indicates whether the output signal of the position sensor assembly has been detected, thus realizing the overall detection of the position sensor assembly on the electric vehicle. If the position sensor assembly malfunctions, each position sensor can be detected individually to pinpoint the specific failure location, improving the accuracy and efficiency of the detection. Preferably, the second docking module includes a second connector and a second control circuit.

[0026] The second connector is electrically connected to the position sensor assembly via a bracket wiring harness and is used to receive the output signal of the position sensor assembly;

[0027] The second control circuit is used to control the output voltage of the second docking module according to the output signal of the position sensor assembly.

[0028] In this solution, the second control circuit controls the output voltage of the second docking module based on the output signal of the position sensor assembly received by the second connector, thereby realizing the overall detection of the position sensor assembly on the electric vehicle. The control circuit has low cost and high reliability.

[0029] Preferably, the position sensor assembly generates a battery swapping signal in response to the battery swapping device reaching a preset position and generates a feedback signal in response to the power battery being installed in place. The feedback signal includes a locking signal generated when all locking mechanisms of the power battery reach the preset position.

[0030] In this solution, the fast-swapping status of the power battery is determined by the battery swapping signal, and corresponding operations are performed based on the fast-swapping status to avoid potential safety hazards during the power battery fast-swapping process and ensure the safety of the equipment and users; the installation status of the power battery is determined by the locking signal to ensure the reliability of the power battery installation and improve the reliability and safety of electric vehicles.

[0031] Preferably, the output terminal of the second docking module includes a first output terminal, and the second signal indicator includes a lock signal indicator;

[0032] The lock signal indicator is electrically connected to the first output terminal and indicates whether the lock signal has been detected based on the output voltage of the first output terminal. Preferably, the second signal indicator includes a battery swapping signal indicator;

[0033] The output terminal of the second docking module also includes a second output terminal;

[0034] The battery swap signal indicator is electrically connected to the second output terminal, and indicates whether the battery swap signal has been detected based on the output voltage of the second output terminal.

[0035] In this solution, the user is prompted by the lock signal indicator and the battery swapping signal indicator, which can help determine whether there is a fault in the position sensor assembly.

[0036] Preferably, the detection device includes a plurality of second docking modules connected in parallel with the power supply; the plurality of second docking modules each include a second connector of different models to match and connect to the bracket harness ports of different models.

[0037] In this solution, the testing device includes second connectors of different models, which realizes matching connection with the wiring harness ports of different models, and can be used for testing different vehicle models, with a wide range of applications.

[0038] Preferably, the detection device includes a housing; the first signal indicator and the second signal indicator are fixed to the outer surface of the housing.

[0039] Preferably, the detection device further includes a trigger;

[0040] The trigger is located inside the housing and protrudes from the outer surface of the housing; the trigger is used to trigger the position sensor to cause the sensor to generate a corresponding output signal.

[0041] In this solution, the position sensor is triggered by a trigger of the detection device, which avoids the position sensor failing to generate a signal due to the triggering device of the power battery, battery swapping device or electric vehicle being loose or falling off. This ensures that the triggering source of the position sensor is effective, and thus the position sensor can be detected individually.

[0042] Preferably, the detection device further includes a power indicator light;

[0043] The power indicator light is fixed to the outer surface of the housing;

[0044] One end of the power indicator light is electrically connected to the positive terminal of the power supply, and the other end of the power indicator light is electrically connected to the negative terminal of the power supply.

[0045] Preferably, the detection device further includes a switch;

[0046] The switch is fixed to the outer surface of the housing;

[0047] The first signal indicator, the at least one first docking module, the at least one second docking module, the second signal indicator, and the power indicator are all electrically connected to the power source via the switch.

[0048] The present invention also provides a detection system for electric vehicles, the detection system comprising an electric vehicle and the detection device as described above, wherein the electric vehicle includes a plurality of position sensors.

[0049] In this solution, the detection system, based on the aforementioned detection device, can detect the feedback signal indicating that the power battery on the electric vehicle is installed in place, and can individually detect any position sensor of the electric vehicle to pinpoint the specific failure location.

[0050] The positive and progressive effects of this invention are as follows:

[0051] The present invention provides a handheld testing device for electric vehicles, used to detect feedback signals indicating that the power battery is installed in place on the electric vehicle. This testing device is independent of the whole vehicle testing circuit and is easy for operators to handle by hand. Unlike the whole vehicle testing circuit, which detects signals from all position sensors on the electric vehicle simultaneously, making it impossible to determine which position sensor is malfunctioning, the first docking module of this testing device can be electrically connected to any position sensor on the electric vehicle and receive the output signal of that position sensor. The first signal indicator can indicate whether the output signal of the position sensor has been detected, thereby enabling individual testing of each position sensor on the electric vehicle to pinpoint the specific location of failure. Attached Figure Description

[0052] Figure 1 This is a circuit diagram of the handheld testing device for electric vehicles according to Embodiment 1 of the present invention.

[0053] Figure 2 This is a schematic diagram of the quick-change bracket for an electric vehicle according to Embodiment 1 of the present invention.

[0054] Figure 3 This is a first side view of the handheld detection device for electric vehicles according to Embodiment 1 of the present invention.

[0055] Figure 4 This is a second side view of the handheld detection device for electric vehicles according to Embodiment 1 of the present invention. Detailed Implementation

[0056] The present invention will be described more clearly and completely below with reference to the accompanying drawings, but this does not limit the invention to the scope of the embodiments described.

[0057] Example 1

[0058] Please refer to Figure 1 This is a circuit diagram of the handheld detection device for the electric vehicle in this embodiment. Specifically, the electric vehicle is equipped with a power battery and several position sensors. The power battery supplies power to the electric vehicle, and the position sensors include at least a first position sensor and a second position sensor. The first position sensor unit is correspondingly configured with the locking mechanism on the electric vehicle and is used to generate a locking signal. The second position sensor unit is correspondingly configured with the battery swapping device and is used to generate a battery swapping signal. This handheld detection device is used to detect the feedback signal indicating that the power battery on the electric vehicle is properly installed, such as... Figure 1 As shown, the handheld detection device includes a power supply 1, at least one first docking module 2, and a first signal indicator 3. The power supply terminal of the first docking module 2 is electrically connected to the positive terminal of the power supply 1, and the ground terminal of the first docking module 2 is electrically connected to the negative terminal of the power supply 1. The first docking module 2 is used to electrically connect to any position sensor on the electric vehicle, and also receives the output signal of the position sensor and adjusts the output voltage according to the output signal. The first signal indicator 3 is used to electrically connect to the output terminal of the first docking module 2, and also receives the output voltage of the first docking module 2 and indicates whether the output signal of the position sensor has been detected according to the output voltage. Specifically, the detection device is equipped with a built-in power supply 1, such as a lithium battery, to provide power to the first signal indicator 3 and at least one first docking module 2.

[0059] In this embodiment, several position sensors on the electric vehicle are connected via a bracket wiring harness to form a position sensor assembly. This assembly detects whether the power battery is properly installed and generates a feedback signal indicating that the power battery is installed correctly. A detection device detects this feedback signal; if the detection device does not detect it, it indicates a malfunction in the position sensor assembly. Specifically, a loose or detached trigger device of the position sensor can prevent it from generating a signal. Other causes include a faulty internal chip, a disconnected connection, or loose connectors. All of these can lead to the position sensor malfunctioning and consequently, a malfunction in the sensor assembly.

[0060] If the detection device indicates a fault in the position sensor assembly, disconnect the detection device from the position sensor assembly and electrically connect the first docking module 2 of the detection device to any one of the position sensors on the electric vehicle. The first docking module 2 outputs a voltage signal based on the output signal of the position sensor. The first signal indicator 3 indicates whether the position sensor's output signal has been detected based on the output voltage signal of the first docking module 2. If the output signal of the first docking module 2 is a low-level signal, the first signal indicator 3 is working normally and indicates that the position sensor's output signal has been detected, meaning the position sensor is working normally. Therefore, based on the indication of the first signal indicator 3, it is possible to accurately determine whether the detected position sensor is working normally. Furthermore, by sequentially detecting each position sensor on the electric vehicle using this detection device, the specific location of the failure can be pinpointed. The first signal indicator 3 may include devices such as an indicator light, a display screen, or a speaker.

[0061] The handheld testing device for electric vehicles provided in this embodiment is used to detect the feedback signal indicating that the power battery is installed in place on the electric vehicle. This testing device is independent of the whole vehicle testing circuit and is easy for operators to handle by hand. Unlike the whole vehicle testing circuit, which detects the signals of all position sensors on the electric vehicle simultaneously, making it impossible to determine which position sensor has failed, the first docking module of this testing device can be electrically connected to any position sensor on the electric vehicle and receive the output signal of that position sensor. The first signal indicator can indicate whether the output signal of the position sensor has been detected, thereby enabling individual testing of the position sensors on the electric vehicle to pinpoint the specific failure location.

[0062] The first position sensor of the electric vehicle can generate a locking signal in response to the locking mechanism of the power battery reaching a preset position; the second position sensor of the electric vehicle can also generate a battery swapping signal in response to the battery swapping device reaching a preset position. Specifically, in this embodiment, a quick-swap bracket is installed on the electric vehicle, and the power battery is locked to the quick-swap bracket by the locking mechanism, such as... Figure 2As shown, the quick-change bracket 10 includes a first locking mechanism 20 and a second locking mechanism 30. The first locking mechanism 20 and the second locking mechanism 30 are disposed on the side of the quick-change bracket 10 facing the battery pack. Specifically, several locking elements are provided on both sides of the power battery, and the first locking mechanism 20 and the second locking mechanism 30 are provided on both opposite inner sides of the quick-change bracket 10. The several locking elements cooperate with the first locking mechanism 20 and the second locking mechanism 30 to lock the power battery to the quick-change bracket 10 of the electric vehicle. The electric vehicle includes two first position sensors, which are configured one-to-one with the two first locking mechanisms 20. They detect whether the two first locking mechanisms 20 have reached a preset position and generate a locking signal. The position sensor assembly of the electric vehicle combines the two locking signals into a locking signal through the bracket wiring harness of the electric vehicle. That is, the locking signal is generated only when all the first locking mechanisms 20 have reached the preset position. The output feedback signal is the battery installation signal. The installation status of the power battery can be determined by the battery installation signal, ensuring the reliability of the power battery installation and improving the reliability and safety of electric vehicles.

[0063] The second position sensor of the electric vehicle is arranged adjacent to the second locking mechanism 30. The second locking mechanism 30 is used to position and cooperate with the battery swapping device. The second position sensor is used to detect whether the battery swapping device has reached the preset position and generate a battery swapping signal to remind the electric vehicle to disconnect the power. This allows the battery swapping device to perform the battery swapping operation when the electric vehicle is powered off, avoiding battery swapping accidents and improving the success rate and safety of the battery swapping operation. The battery swapping signal determines the fast swapping status of the power battery, and corresponding operations are performed according to the fast swapping status to avoid safety hazards during the fast swapping process and ensure the safety of the equipment and the user.

[0064] Position sensors for electric vehicles can include magnetic field sensors, capacitive proximity sensors, inductive proximity sensors, or photoelectric proximity sensors. Specifically, magnetic field sensors can include Hall effect sensors. Position sensors offer high accuracy, good real-time performance, and low cost.

[0065] The first docking module 2 includes a first connector 21 and a first control circuit 22. The first connector 21 is electrically connected to any position sensor to receive the output signal of the position sensor. The first control circuit 22 controls the output voltage of its output terminal OUTPUT according to the output signal. Specifically, when the power battery is installed in place, but the detection device does not detect a feedback signal indicating that the power battery is installed in place, the first connector 21 is electrically connected to any position sensor on the electric vehicle to receive the output signal of that position sensor. The first control circuit 22 controls the output voltage signal of the output terminal OUTPUT according to the output signal of the position sensor. The first signal indicator 3 receives the output voltage signal of the first docking module 2 and provides a prompt. In this embodiment, the first signal indicator 3 includes an indicator light. When the first docking module 2 outputs a low-level signal, the first signal indicator 3 lights up, indicating that the output signal of the position sensor has been detected and the position sensor is working normally; otherwise, the first signal indicator 3 does not light up, indicating that the output signal of the position sensor has not been detected and the position sensor is not working normally.

[0066] Preferably, the installation position signal detection device includes several first docking modules 2 connected in parallel with a power supply; each of the several first docking modules 2 includes a first connector 21 of a different model; the first connector 21 of a different model is electrically connected to a position sensor of a matching model for receiving the output signal of the position sensor. Specifically, the installation position signal detection device includes two first docking modules 2 connected in parallel with a power supply, and the two first docking modules 2 respectively include automotive connectors of model MOLEX 34899-3080 and model Hulian AS03FW. The detection device includes first connectors of different models, realizing matching connection with position sensors of different models, and has a wide range of applications. In other embodiments, the specific number of first docking modules 2 and the specific model of automotive connectors can be set according to the actual application.

[0067] In this embodiment, the detection device further includes a second docking module 4 and a second signal indicator. The power supply terminal VCC of the second docking module 4 is electrically connected to the positive terminal of the power supply 1, and the ground terminal GND of the second docking module 4 is electrically connected to the negative terminal of the power supply 1. The second docking module 4 is used to electrically connect to the position sensor assembly of the electric vehicle, receive the output signal from the position sensor assembly, and adjust the output voltage according to the output signal. The second signal indicator is used to electrically connect to the output terminal OUTPUT of the second docking module 4, and also receives the output voltage of the second docking module 4 and indicates whether the output signal of the position sensor assembly has been detected based on the output voltage.

[0068] Specifically, the position sensor assembly generates a battery swapping signal in response to the battery swapping device reaching a preset position and a feedback signal in response to the power battery being installed in place. The feedback signal includes a locking signal generated when all locking mechanisms of the power battery reach the preset position. In other words, the position sensor assembly on the electric vehicle generates both a locking signal and a battery swapping signal in response to the power battery's locking mechanisms reaching the preset position. The second docking module 4 can be electrically connected to the position sensor assembly via a bracket wiring harness and outputs a voltage signal based on the position sensor assembly's output signal. The second signal indicator indicates whether the position sensor assembly's output signal has been detected based on the output voltage signal of the second docking module 4. The indicator's prompts determine whether the position sensor assembly is functioning correctly. The second signal indicator may include a warning light, a display screen, or a speaker.

[0069] Specifically, when the battery swapping device reaches the preset position, the second docking module 4 receives the battery swapping signal from the position sensor assembly and outputs a voltage signal. When all the locking mechanisms of the power battery reach the preset position, the second docking module 4 receives the locking signal from the position sensor assembly and outputs a voltage signal. The second signal indicator 5 receives the output voltage signal from the second docking module 4 and indicates whether the feedback signal from the position sensor assembly indicating that the power battery is installed in place has been detected.

[0070] The second docking module 4 includes a second connector 41 and a second control circuit 42. The second connector 41 is electrically connected to the position sensor assembly and is used to receive the output signal of the position sensor assembly; the second control circuit 42 is used to control the output voltage of the output terminal OUTPUT of the second docking module 4 according to the output signal of the position sensor assembly.

[0071] The second docking module 4's output terminal OUTPUT includes a first output terminal OUTPUTd, and the second signal indicator includes a locking signal indicator 51. The locking signal indicator 51 is electrically connected to the first output terminal OUTPUTd and indicates whether a locking signal has been detected based on the output voltage of the first output terminal OUTPUTd. Specifically, when all locking mechanisms of the power battery reach a preset position, the second connector 41 receives the locking signal from the position sensor assembly. The second control circuit 42 controls the first output terminal OUTPUTd of the second docking module 4 to output a voltage signal based on the locking signal from the position sensor assembly. The locking signal indicator 51 receives the output voltage signal from the second docking module 4 and provides an indication. In this embodiment, the locking signal indicator 51 includes an indicator light. Specifically, when both first position sensors are working normally at the same time, the first output terminal OUTPUTd outputs a low-level signal, and the locking signal indicator 51 lights up, indicating that a locking signal has been detected. If either of the two first position sensors malfunctions, the first output terminal OUTPUTd will not output a low-level signal, and the lock signal indicator 51 will not light up, indicating that no lock signal has been detected.

[0072] The second docking module 4's output terminal OUTPUT further includes a second output terminal OUTPUTs; the second signal indicator includes a battery swapping signal indicator 52; the battery swapping signal indicator 52 is electrically connected to the second output terminal OUTPUTs and indicates whether a battery swapping signal has been detected based on the output voltage of the second output terminal OUTPUTs. Specifically, when the battery swapping device reaches a preset position, the second connector 41 receives the battery swapping signal from the position sensor assembly, and the second control circuit 42 controls the second output terminal OUTPUTs of the second docking module 4 to output a voltage signal based on the battery swapping signal from the position sensor assembly. The battery swapping signal indicator 52 receives the output voltage signal from the second docking module 4 and provides an indication. In this embodiment, the battery swapping signal indicator 52 includes an indicator light. Specifically, when the position sensor performing the battery swapping signal detection is working normally, the second output terminal OUTPUTs outputs a low-level signal, and the battery swapping signal indicator 52 lights up, indicating that a battery swapping signal has been detected. Otherwise, the second output terminal OUTPUTs cannot output a low-level signal, the battery swapping signal indicator 52 does not light up, indicating that a battery swapping signal has not been detected.

[0073] When the second output terminal OUTPUTs and the first output terminal OUTPUTd output low-level signals in sequence, and the battery swap signal indicator 52 and the lock signal indicator 51 light up in sequence, it indicates that a feedback signal indicating that the power battery is installed in place has been detected, that is, the battery swap signal and the lock signal have been detected, and the position sensor assembly is working normally. However, if either the first output terminal OUTPUTd or the second output terminal OUTPUTs does not output a low-level signal, and either the corresponding lock signal indicator 51 or the battery swap signal indicator 52 does not light up, it indicates that the position sensor assembly has malfunctioned.

[0074] Preferably, the installation position signal detection device includes several second docking modules 4 connected in parallel with the power supply 1; each of the several second docking modules 4 includes a second connector 41 of different models; the different models of the second connector 41 are electrically connected to the matching model of the bracket wiring harness port for receiving the output signal of the position sensor assembly. Specifically, the installation position signal detection device includes four second docking modules 4 connected in parallel with the power supply, and the four second docking modules 4 respectively include automotive connectors of models Sumitomo 6189-7609, Sumitomo 6188-5677, MOLEX 33472-0601, and MOLEX 33472-4001. The detection device includes different models of second connectors 41, realizing matching connection with the bracket wiring harness ports of different models, which is applicable to the detection of different vehicle models and has a wide range of applications. In other embodiments, the specific number of second docking modules 4 and the specific model of automotive connectors can be set according to the actual application.

[0075] like Figure 3 and Figure 4 As shown, the detection device includes a housing 6; a first signal indicator 3, a lock signal indicator 51, and a battery swap signal indicator 52 are fixed to the outer surface of the housing 6.

[0076] The detection device also includes several triggers 7; the triggers 7 are located inside the housing 6, and the surface of the housing 6 is provided with through holes, through which the triggers 7 protrude from the outer surface of the housing; the triggers 7 are used to trigger the position sensor to make the position sensor generate a corresponding output signal. Specifically, if the triggering device of the position sensor, power battery, battery swapping device, or electric vehicle is loose or detached, it will also cause the position sensor to fail to generate a signal. The position sensor can be removed from the electric vehicle and placed on the trigger 7 to ensure that the triggering source of the position sensor is effective. This allows the position sensor to be tested individually, and it can be determined whether the internal chip of the position sensor is faulty. If the first signal indicator 3 is lit, it indicates that the output signal of the position sensor has been detected, and the position sensor is not faulty; otherwise, if the first signal indicator 3 is not lit, it indicates that the output signal of the position sensor has not been detected, and the position sensor is faulty.

[0077] The installation signal detection device also includes a power indicator light 8; the power indicator light 8 is fixed on the outer surface of the housing 6; one end of the power indicator light 8 is electrically connected to the positive terminal of the power supply 1, and the other end of the power indicator light 8 is electrically connected to the negative terminal of the power supply 1.

[0078] The installation signal detection device also includes a switch 9; the switch 9 is fixed on the outer surface of the housing 6; the first signal indicator 3, at least one first docking module 2, the second docking module 4, the second signal indicator 5 and the power indicator 8 are all electrically connected to the power supply 1 through the switch 9.

[0079] The electric vehicle detection device provided in this embodiment is independent of the overall vehicle detection circuit. This device is a handheld detection device with a built-in power supply. The second docking module of the detection device can be electrically connected to the position sensor assembly and receive the output signal of the position sensor assembly. The second signal indicator can indicate whether the output signal of the position sensor assembly has been detected, thereby enabling overall detection of the position sensor assembly. If the position sensor assembly malfunctions, the first docking module of the detection device can be electrically connected to any position sensor on the electric vehicle and receive the output signal of that position sensor. The first signal indicator can indicate whether the output signal of that position sensor has been detected, thereby enabling individual detection of that position sensor to pinpoint the specific failure location. The trigger of the device can enable the position sensor to generate an output signal normally, thereby detecting whether the position sensor, power battery, battery swapping device, or triggering device of the electric vehicle is loose or detached, causing the position sensor to fail to generate a signal.

[0080] Example 2

[0081] This embodiment provides a detection system for electric vehicles. The detection system includes an electric vehicle and the detection device of Embodiment 1. The electric vehicle includes several position sensors.

[0082] The electric vehicle detection system provided in this embodiment utilizes the aforementioned detection device to detect feedback signals indicating that the power battery on the electric vehicle is installed in place, and can also individually detect the position sensor of the electric vehicle to pinpoint the specific failure location.

[0083] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A hand-held detection device for an electric vehicle, characterized in that The detection device is used for detecting a feedback signal of installation of the power battery on the electric vehicle, and comprises a power supply, a first signal prompter and at least one first docking module; The power supply end of the first docking module is electrically connected with the positive pole of the power supply, and the grounding end of the first docking module is electrically connected with the negative pole of the power supply; The first docking module is used for being electrically connected with any one position sensor on the electric vehicle, receiving an output signal of the position sensor and adjusting an output voltage according to the output signal; The first signal prompter is used for being electrically connected with the output end of the first docking module, receiving the output voltage of the first docking module and prompting whether the output signal of the position sensor is detected according to the output voltage; The detection device further comprises a second signal prompter and at least one second docking module; The power supply end of the second docking module is electrically connected with the positive pole of the power supply, and the grounding end of the second docking module is electrically connected with the negative pole of the power supply; The second docking module is used for being electrically connected with a position sensor assembly of the electric vehicle, the position sensor assembly is formed by connecting a plurality of position sensors through a bracket wire harness, and the second docking module receives an output signal of the position sensor assembly and adjusts an output voltage according to the output signal; The second signal prompter is used for being electrically connected with the output end of the second docking module, receiving the output voltage of the second docking module and prompting whether the output signal of the position sensor assembly is detected according to the output voltage; The first docking module comprises a first connector and a first control circuit; The first connector is used for being electrically connected with the position sensor, receiving the output signal of the position sensor; The first control circuit is used for controlling the output voltage of the first docking module according to the output signal.

2. The detection device of claim 1, wherein, The detection device comprises a plurality of first docking modules connected in parallel with the power supply; the plurality of first docking modules respectively comprise first connectors of different models to match connection of position sensors of different models.

3. The detection device of claim 1, wherein, The position sensor comprises a magnetic field sensor, a capacitive proximity sensor, an inductive proximity sensor or a photoelectric proximity sensor.

4. The detection device of claim 3, wherein, The magnetic field sensor comprises a Hall sensor.

5. The detection device of claim 1, wherein, The position sensor generates a locking-in-place signal in response to the locking mechanism of the power battery reaching a preset position; and / or The position sensor generates a battery replacement signal in response to the battery replacement device reaching a preset position.

6. The detection device of claim 1, wherein, The second docking module comprises a second connector and a second control circuit; The second connector is electrically connected with the position sensor assembly through the bracket wire harness, and is used for receiving the output signal of the position sensor assembly; The second control circuit is used for controlling the output voltage of the second docking module according to the output signal of the position sensor assembly.

7. The detection device of claim 1, wherein, The position sensor assembly generates a battery replacement signal in response to the battery replacement device reaching a preset position and a feedback signal in response to the power battery being installed in place, and the feedback signal comprises a lock-down signal generated by all locking mechanisms of the power battery reaching a preset position.

8. The detection device of claim 7, wherein, The output end of the second docking module comprises a first output end, and the second signal prompter comprises a drop lock signal prompter; The drop lock signal prompter is electrically connected with the first output end, and prompts whether the drop lock signal is detected according to the output voltage of the first output end.

9. The detection device of claim 8, wherein, The second signal prompter comprises a battery replacement signal prompter; The output end of the second docking module further comprises a second output end; The battery replacement signal prompter is electrically connected with the second output end, and prompts whether the battery replacement signal is detected according to the output voltage of the second output end.

10. The detection device of claim 6, wherein, The detection device comprises a plurality of second docking modules connected in parallel with the power supply; the plurality of second docking modules respectively comprise second connectors of different models to match different model bracket wire harness ports.

11. The detection device of claim 1, wherein, The detection device comprises a shell; The first signal prompter and the second signal prompter are fixedly arranged on the outer surface of the shell.

12. The detection device of claim 11, wherein, The detection device further comprises a trigger; The trigger is arranged in the shell and exposed on the outer surface of the shell; The trigger is used to trigger the position sensor to make the sensor generate a corresponding output signal.

13. The detection device of claim 12, wherein, The detection device further comprises a power supply indicator light; The power supply indicator light is fixedly arranged on the outer surface of the shell; One end of the power supply indicator light is electrically connected with the positive electrode of the power supply, and the other end of the power supply indicator light is electrically connected with the negative electrode of the power supply.

14. The detection device of claim 13, wherein, The detection device further comprises a switch; The switch is fixedly arranged on the outer surface of the shell; The first signal prompter, the at least one first docking module, the at least one second docking module, the second signal prompter and the power supply indicator light are all electrically connected with the power supply through the switch.

15. A detection system for an electric vehicle, characterized by The detection system comprises an electric vehicle and the detection device according to any one of claims 1-14, and the electric vehicle comprises a plurality of position sensors.

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