Battery detection system, battery detection method, and vehicle

Abstract

The present application relates to a battery detection system, a battery detection method, and a vehicle, and relates to the technical field of vehicles; the battery detection system includes a charge and discharge circuit, a power battery, and a detection device, and the power battery is respectively connected to the charge and discharge circuit and the detection device; in the case where the battery detection system is in a detection mode, the charge and discharge circuit is configured to: send a detection signal to the power battery; the detection device is configured to: receive a feedback signal for determining the battery life of the power battery; the feedback signal is generated by the power battery based on the applied detection signal and is used to improve the accuracy of the determined battery life.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, especially the technical field of vehicles, and particularly relates to a battery detection system, a battery detection method, and a vehicle. Background Art

[0002] New energy vehicles use power batteries as important power sources. When the battery life of the vehicle's power battery is insufficient, it will affect the normal driving of the vehicle. Therefore, it is necessary to determine the battery life of the power battery and let users know the battery life of the power battery in a timely manner.

[0003] In order to determine the battery life of the power battery, related technical solutions disclose a method for predicting the remaining life of lithium ions. The method includes: taking a battery to be tested, and performing cyclic charge and discharge tests on the battery to be tested with a set current and voltage in a set working environment, and collecting data on the cycle number and the battery capacity after each cycle; determining the remaining life of the battery according to the obtained battery capacity data and a preset formula. There is also disclosed an intelligent monitoring method for an automotive battery based on vehicle networking big data technology. The method includes: obtaining battery parameters such as the voltage, current, and state of charge of the battery, and substituting the battery parameters into a life calculation model to obtain the battery life. Since this method directly substitutes the collected battery parameters into an existing life calculation model for calculation, without considering the characteristics of different batteries and different vehicles, the accuracy of the determined battery life is relatively low. Summary of the Invention

[0004] The present application provides a battery detection system, a battery detection method, and a vehicle, which are used to improve the accuracy of battery life detection without adding a new power module. The technical solution of the present application is as follows:

[0005] According to a first aspect provided by the present application, a battery detection system is provided. The battery detection system 20 includes a charge and discharge circuit 21, a power battery 22, and a detection device 23. The power battery 22 is respectively connected to the charge and discharge circuit 21 and the detection device 23. When the battery detection system 20 is in the detection mode, the charge and discharge circuit 21 is configured to: send a detection signal to the power battery 22. The detection device 23 is configured to: receive a feedback signal for determining the battery life of the power battery 22. The feedback signal is generated by the power battery 22 based on the applied detection signal.

[0006] According to the above technical means, a detection signal is sent to the power battery 22 through the charge and discharge circuit 21, and the battery life of the power battery 22 is determined according to the feedback signal sent by the power battery 22. In this way, the battery life is determined by using the method of electrochemical impedance measurement. Since the detection signal will change according to the characteristics of the power battery 22 after passing through the power battery 22, a feedback signal is obtained. Subsequently, since the feedback signal can accurately reflect the battery characteristics of the power battery 22, the battery life of the power battery 22 is determined according to the battery characteristics of the power battery 22, thereby improving the accuracy of the determined battery life. In addition, in addition to the power supply replenishment function of the battery detection system itself, the battery detection system also integrates an electrochemical impedance measurement detection function. The detection signal is supplied with power by the charge and discharge circuit 21 of the battery detection system itself to the power battery 22, and there is no need to add a transmission module and a power module in the vehicle, reducing the cost.

[0007] In a possible way, the battery detection system 20 further includes a storage battery 24. The charge and discharge circuit 21 includes a bidirectional DC converter 211. One end of the bidirectional DC converter 211 is connected to the power battery 22, and the other end of the bidirectional DC converter 211 is connected to the storage battery 24; when the battery detection system 20 is in the detection mode, the bidirectional DC converter 211 is configured to: generate a detection signal and send the detection signal to the power battery 22.

[0008] According to the above technical means, the bidirectional DC converter 211 is used to generate a detection signal and send the detection signal to the power battery 22, thereby being able to reduce the cost of the vehicle.

[0009] In a possible way, the detection signal is a high-voltage pulse current. The bidirectional DC converter 211 is specifically configured to: generate a high-voltage pulse current according to the low-voltage direct current provided by the storage battery 24 and send the high-voltage pulse current to the power battery 22.

[0010] According to the above technical means, the bidirectional DC converter 211 is used to generate a high-voltage pulse current, and the high-voltage pulse current is used to detect the battery characteristics of the power battery 22. Since the change of the high-voltage pulse current can truly reflect the characteristics of the power battery, the detection accuracy of the power battery 22 can be improved.

[0011] In a possible way, the charge and discharge circuit 21 further includes an inverter device 212. One end of the inverter device 212 is configured to be connected to the mains interface 25, and the other end of the inverter device 212 is configured to be connected to the power battery 22 and is also connected to the bidirectional DC converter 211.

[0012] In a possible way, when the battery detection system 20 is in the AC charging mode, the inverter device 212 is configured to: convert the commercial power into a first direct current, and use the first direct current to charge the power battery 22 and supply the first direct current to the bidirectional DC converter 211. The bidirectional DC converter 211 is further configured to: step down the first direct current to obtain a second direct current, and use the second direct current to charge the storage battery 24.

[0013] In a possible way, one end of the inverter device 212 is further configured to be connected to the AC load 26; when the battery detection system 20 is in the discharge mode, the charge and discharge circuit 21 is further configured to: convert the direct current provided by the power battery 22 into an alternating current through the inverter device 212, and supply power to the AC load 26 by using the alternating current.

[0014] In a possible way, when the battery detection system 20 is in the low-voltage charging mode, the bidirectional DC converter 211 is further configured to: step down the direct current provided by the power battery 22 to obtain a third direct current, and use the third direct current to charge the storage battery 24.

[0015] In a possible way, the detection device 23 is further configured to: determine the battery life of the power battery 22 according to the feedback signal and the detection signal.

[0016] In a possible way, the inverter device 212 includes a rectifier-inverter circuit and a resonant circuit.

[0017] According to the second aspect provided by the present application, a battery detection method is provided, which is applied to the battery detection system 20 as described in the first aspect; the method includes: when the battery detection system 20 is in the detection mode, using the charge and discharge circuit 21 to send a detection signal to the power battery 22. Using the detection device 23 to receive a feedback signal for determining the battery life of the power battery 22; the feedback signal is generated by the power battery 22 based on the applied detection signal.

[0018] In a possible way, the charge and discharge circuit 21 of the battery detection system 20 includes a bidirectional DC converter 211, the battery detection system 20 further includes a storage battery 24, and the method further includes: using the bidirectional DC converter 211 to generate a detection signal and send the detection signal to the power battery 22.

[0019] According to the third aspect provided by the present application, a vehicle is provided, which includes the battery detection system 20 as described in the first aspect.

[0020] It should be noted that the technical effects brought by any implementation manner in the second aspect to the third aspect can refer to the technical effects brought by the corresponding implementation manner in the first aspect, and will not be elaborated here.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application and do not unduly limit the present application.

[0023] Figure 1 is a schematic structural diagram of an electrochemical impedance measurement system shown according to an exemplary embodiment;

[0024] Figure 2 is one of the schematic structural diagrams of a battery detection system shown according to an exemplary embodiment;

[0025] Figure 3 is the second schematic structural diagram of a battery detection system shown according to an exemplary embodiment;

[0026] Figure 4 is a schematic flow diagram of a battery detection method shown according to an exemplary embodiment;

[0027] Figure 5 is a schematic diagram of the current flow direction of a battery detection system in a detection mode shown according to an exemplary embodiment;

[0028] Figure 6 is a schematic diagram of the current flow direction of a battery detection system in an AC charging mode shown according to an exemplary embodiment;

[0029] Figure 7 is a schematic diagram of the current flow direction of a battery detection system in a discharge mode shown according to an exemplary embodiment;

[0030] Figure 8 is a schematic diagram of the current flow direction of a battery detection system in a low-voltage charging mode shown according to an exemplary embodiment;

[0031] Figure 9 is a schematic structural diagram of a power supply replenishment system shown according to an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that in the description of the present application, the claims, and the above-mentioned drawings, the terms "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0034] As described in the background art, the accuracy of the current method for determining battery life by substituting battery parameters into the life calculation model is relatively low. To improve the accuracy of battery life, the related art discloses an electrochemical impedance measurement system. As Figure 1 shown, Figure 1 FIG. 7 is an electrochemical impedance measurement system 10 shown according to an exemplary embodiment, including: a power supply device 11, a transmitting device 12, a detecting device 13, and a battery device 14. The transmitting device 12 is respectively connected to the power supply device 11, the detecting device 13, and the battery device 14 (such as a power battery), and the detecting device 13 is connected to the battery device 14.

[0035] In the electrochemical impedance measurement system 10, the power supply device 11 supplies power to the transmitting device 12 so that the transmitting device 12 generates a detection signal and sends the detection signal to the battery device 14. Correspondingly, the battery device 14 is applied with the detection signal, and after the detection signal passes through the battery device 14, a feedback signal is output to the detecting device 13. Among them, the feedback signal is generated after the detection signal passes through the battery device 14.

[0036] Subsequently, the detecting device 13 receives the feedback signal from the battery device 14 and determines the battery life of the battery device 14 according to the feedback signal. In this way, since the detection signal changes according to the characteristics of the battery device 14 (such as the cell resistance and capacitance) after passing through the battery device 14 to obtain the feedback signal. In this way, according to the change situation of the detection signal and the feedback signal, the current true state of the battery device 14 can be determined, and thus the battery life of the battery device 14 can be obtained more accurately.

[0037] However, since in the electrochemical impedance measurement system 10, a new power supply device 11 needs to be added to the vehicle, as a result, the cost of the whole vehicle increases.

[0038] To solve the above technical problems, as Figure 2 shown, FIG. 21 is a battery detection system 20 shown according to an exemplary embodiment. In Figure 2In the battery detection system 20, it includes a charge and discharge circuit 21, a power battery 22, and a detection device 23. The power battery 22 is respectively connected to the charge and discharge circuit 21 and the detection device 23. When the battery detection system 20 is in the detection mode, the charge and discharge circuit 21 is configured to: send a detection signal to the power battery 22.

[0039] In some embodiments, as Figure 2 shown, the charge and discharge circuit 21 is connected to the detection device 23.

[0040] The detection device 23 is configured to: receive a feedback signal for determining the battery life of the power battery 22. Among them, the feedback signal is generated by the power battery based on the applied detection signal.

[0041] As a possible implementation manner, in response to a battery detection instruction, the battery detection system 20 is controlled to enter the detection mode. Further, the charge and discharge circuit 21 is configured to: generate a detection signal and supply power to the power battery 22.

[0042] In the embodiments of the present application, the charge and discharge circuit 21 is a circuit for realizing the charging and discharging functions of the power battery 22.

[0043] In some embodiments, the battery detection system 20 further includes a power supply device, and the charge and discharge circuit 21 includes a transmitting device. One end of the transmitting device is connected to the power battery 22, and the other end of the transmitting device is connected to a storage battery. When the battery detection system 20 is in the detection mode, the transmitting device is configured to: generate a detection signal and send the detection signal to the power battery 22. The power supply device is configured to: supply power to the transmitting device.

[0044] In the embodiments of the present application, the transmitting device can be a device for generating a detection signal. For example, the transmitting device can be a signal transmitting module (such as the above-mentioned transmitting device 12), and can also be a current regulating device with a signal transmitting function (such as a bidirectional DC converter). The power supply device can be a device for supplying power to the transmitting device. For example, the power supply device can be a device for providing direct current, and can also be a device for providing alternating current. The embodiments of the present application do not make specific limitations on the transmitting device and the power supply device.

[0045] Exemplarily, as Figure 3 shown, the power supply device is a storage battery 24, the transmitting device is a bidirectional DC converter 211, one end of the bidirectional DC converter 211 is connected to the power battery 22, and the other end of the bidirectional DC converter 211 is connected to the storage battery. When the battery detection system 20 is in the detection mode, the bidirectional DC converter 211 is configured to: generate a detection signal and send the detection signal to the power battery. The storage battery 24 is configured to supply power to the bidirectional DC converter 211.

[0046] In some embodiments, the bidirectional DC converter 211 is configured to superimpose different frequency signals on the current provided by the storage battery 24 according to the detection requirements to generate a high-voltage pulsed current with a target spectrum.

[0047] In the embodiments of the present application, the high-voltage pulsed current is a pulsed current greater than a preset voltage threshold. The preset voltage threshold can be 110V or 200V. In this regard, the embodiments of the present application do not make any limitations. Exemplarily, the high-voltage pulsed current is a pulsed current of 220V.

[0048] In the embodiments of the present application, the voltage of the storage battery 24 can be 12V or 24V. In this regard, the embodiments of the present application do not make any limitations. It can be understood that by using the bidirectional DC converter 211 to generate a detection signal and send the detection signal to the power battery 22, the cost of the vehicle can be reduced.

[0049] In some other embodiments, the charge and discharge circuit 21, in response to a signal generation instruction, generates a detection signal corresponding to the signal generation instruction according to the signal generation instruction, and sends the detection signal to the power battery 22. Among them, the signal generation instruction is used to instruct the transmitting device 12 to generate a detection signal with specific characteristics. Among them, the detection signal with specific characteristics is related to the battery parameters (such as voltage, current or impedance) of the power battery 22.

[0050] Specifically, the processor of the vehicle where the battery detection system 20 is located acquires the battery parameters of the battery device, and obtains the characteristics of the detection signal according to the battery parameters and the signal determination algorithm. Further, the processor generates a signal generation instruction according to the characteristics of the detection signal, and sends the signal generation instruction to the charge and discharge circuit 21.

[0051] For example, the battery detection system 20 generates a signal generation instruction according to the model, current voltage, current current of the power battery 22 and the signal determination algorithm. The signal generation instruction is used to instruct the charge and discharge circuit 21 to generate a detection signal with a target spectrum.

[0052] It should be noted that the signal determination algorithm is pre-configured by the operation and maintenance personnel. The detection signal can be a pulsed current.

[0053] In the embodiments of the present application, the detection signal can be a high-voltage pulsed current. The bidirectional DC converter 211 is specifically configured to: generate a high-voltage pulsed current according to the low-voltage direct current provided by the storage battery, and send the high-voltage pulsed current to the power battery.

[0054] In some embodiments, the charge and discharge circuit 21 can also output pulsed currents with different spectra according to the detection requirements. For example, the charge and discharge circuit 21 outputs different pulsed currents according to different battery parameters of the power battery 22.

[0055] The detection device 23 is configured to receive a feedback signal for determining the battery life of the power battery 22.

[0056] Wherein, the feedback signal is generated by the power battery 22 based on the applied detection signal.

[0057] In the embodiments of the present application, the feedback signal is a signal obtained by the change of the detection signal after passing through the power battery 22. For example, taking the detection signal as the first pulse current, after the first pulse current is applied to the power battery 22 and passes through the battery cells of the power battery 22, the first pulse current changes to the second pulse current. Subsequently, the power battery 22 sends the second pulse signal to the detection device 23.

[0058] As a possible implementation manner, the detection device 23 is configured to receive the feedback signal from the power battery 22 and determine the battery life of the power battery 22 according to the feedback signal.

[0059] In some embodiments, the detection device 23 is configured to collect the voltage and current parameters returned from the power battery 22, analyze the electrochemical impedance spectrum of the battery device according to the voltage and current parameters, and calculate the relevant information of the battery device according to the electrochemical impedance spectrum, such as calculating the battery life of the battery device.

[0060] In some embodiments, the detection device 23 acquires the first signal feature of the feedback signal, and determines the battery life of the power battery 22 according to the first signal feature and the second signal feature of the detection signal. For example, the first signal feature and the second signal feature are input into the life determination model to obtain the battery life of the power battery 22.

[0061] In some other embodiments, the detection device 23 sends the feedback signal to the processor of the vehicle. Subsequently, the processor determines the battery life of the power battery 22 according to the feedback signal.

[0062] Alternatively, the detection device 23 sends the feedback signal to the server through the communication device. Correspondingly, the server determines the battery life of the power battery 22 according to the feedback signal, and generates a detection result according to the battery life. Further, the server sends the detection result to the vehicle. Correspondingly, the vehicle receives the detection result from the server and displays the detection result.

[0063] In some embodiments, the detection device 23 may be located inside the power battery 22 or outside the power battery 22. In this regard, the embodiments of the present application do not make any limitations.

[0064] The battery detection system provided by the embodiment of the present application has at least the following beneficial effects: A detection signal is sent to the power battery 22 through the charge and discharge circuit 21, and the battery life of the power battery 22 is determined according to the feedback signal sent by the power battery 22. In this way, the method of measuring the electrochemical impedance is used to determine the battery life. Since the detection signal changes according to the characteristics of the power battery 22 after passing through the power battery 22, a feedback signal is obtained. Subsequently, since the feedback signal can accurately reflect the battery characteristics of the power battery 22, the battery life of the power battery 22 is determined according to the battery characteristics of the power battery 22, thereby improving the accuracy of the determined battery life. In addition, in addition to the power supply replenishment function of the battery detection system itself, the battery detection system also integrates an electrochemical impedance measurement detection function. The charge and discharge circuit 21 of the battery detection system itself is used to supply power to the power battery 22 by sending a detection signal, without adding a new transmission module and power supply module in the vehicle, reducing the cost.

[0065] In one design, the battery detection system 20 further includes an inverter device 212. As Figure 3 shown, one end of the inverter device 212 is configured to be connected to the mains interface 25, the other end of the inverter device 212 is configured to be connected to the power battery 22, and is also connected to the bidirectional DC converter 211.

[0066] The embodiment of the present application does not specifically limit the specific structure of the inverter device 212, as long as it can realize AC to DC and DC to AC. For example, the inverter device 212 includes a rectifier-inverter circuit and a resonant circuit. Or, the inverter device 212 includes a power factor correction circuit and a resonant circuit.

[0067] In one design, when the battery detection system 20 is in the AC charging mode, the inverter device 212 is configured to: convert the mains power into a first direct current, and use the first direct current to charge the power battery and provide the first direct current to the bidirectional DC converter 211. The bidirectional DC converter 211 is further configured to: step down the first direct current to obtain a second direct current, and use the second direct current to charge the storage battery.

[0068] In one design, one end of the inverter device 212 is further configured to be connected to the AC load 26; when the battery detection system 20 is in the discharge mode, the charge and discharge circuit 21 is further configured to: convert the direct current provided by the power battery 22 into an alternating current through the inverter device 212, and use the alternating current to supply power to the AC load 26.

[0069] In one design, when the battery detection system 20 is in the low-voltage charging mode, the bidirectional DC converter 211 is further configured to: step down the direct current provided by the power battery 22 to obtain a third direct current, and use the third direct current to charge the storage battery 24.

[0070] On this basis, a battery detection method provided by the present application is applied to the above-mentioned battery detection system 20. As Figure 4 shown, it is a schematic flowchart of a battery detection method shown according to an exemplary embodiment. The battery detection method includes: S401 - S402.

[0071] S401. When the battery detection system 20 is in the detection mode, use the charge and discharge circuit 21 to send a detection signal to the power battery 22.

[0072] S402. Use the detection device 23 to receive a feedback signal for determining the battery life of the power battery 22.

[0073] Among them, the feedback signal is generated by the power battery 22 based on the applied detection signal.

[0074] In some embodiments, the battery detection method provided by the embodiments of the present application further includes: S403 - S404.

[0075] S403. Use the bidirectional DC converter 211 to generate a detection signal.

[0076] S404. Send the detection signal to the power battery 22.

[0077] In some embodiments, the battery detection method provided by the embodiments of the present application further includes: S405.

[0078] S405. The detection device 23 determines the battery life of the power battery 22 according to the detection signal and the feedback signal.

[0079] In some embodiments, the battery detection method provided by the embodiments of the present application further includes: S406 - S408.

[0080] S406. When the battery detection system 20 is in the AC charging mode, use the inverter device 212 to convert the mains power into a first direct current.

[0081] S407. Use the first direct current to charge the power battery 22 and provide the first direct current to the bidirectional DC converter 211.

[0082] S408. Use the bidirectional DC converter 211 to step down the first direct current to obtain a second direct current, and use the second direct current to charge the storage battery 24.

[0083] In some embodiments, the battery detection method provided by the embodiments of the present application further includes: S409 - S410.

[0084] S409. When the battery detection system 20 is in the low-voltage charging mode, the bidirectional DC converter 211 is used to step down the direct current provided by the power battery 22 to obtain a third direct current.

[0085] S410. Use the third direct current to charge the storage battery 24.

[0086] To better understand the battery detection system 20 provided in the embodiments of the present application and the operation mode of the battery detection system 20, the following gives the operation schematic diagrams of the battery detection system 20 in different operation modes.

[0087] Combined with Figure 3 , as Figure 5 shown, it is a schematic diagram of the current flow direction of a battery detection system 20 in the detection mode according to an exemplary embodiment.

[0088] Specifically, when the mode of the battery detection system 20 is the detection mode, as Figure 5 shown, the storage battery 24 provides low-voltage direct current to the bidirectional DC converter 211. Correspondingly, the bidirectional DC converter 211 performs an inversion process on the low-voltage direct current to generate a first high-voltage pulsed current with a target frequency spectrum, and transmits the first high-voltage pulsed current to the power battery 22. Subsequently, the power battery 22 outputs a second high-voltage pulsed current to the detection device 23. Among them, the second high-voltage pulsed current is the first high-voltage pulsed current passing through the battery cells of the power battery 22.

[0089] Combined with Figure 3 , as Figure 6 shown, it is a schematic diagram of the current flow direction of a battery detection system 20 in the AC charging mode according to an exemplary embodiment.

[0090] Specifically, when the mode of the battery detection system 20 is the first charging mode, as Figure 6 shown, the commercial power is input to the inverter device 212 through the commercial power interface 25 ( Figure 6 shows 220V alternating current). The inverter device 212 outputs high-voltage direct current to charge the power battery 22. In addition, the inverter device 212 also inputs high-voltage direct current to the bidirectional DC converter 211. The bidirectional DC converter 211 steps down the high-voltage direct current to obtain low-voltage direct current, and uses the low-voltage direct current to charge the storage battery 24.

[0091] Combined with Figure 3 , as Figure 7 shown, it is a schematic diagram of the current flow direction of a battery detection system 20 in the discharge mode according to an exemplary embodiment.

[0092] Specifically, when the mode of the battery detection system 20 is the discharge mode, as Figure 7As shown, the high-voltage direct current provided by the power battery 22 is input into the inverter device 212. After the inverter device 212 inverts the high-voltage direct current, it supplies power to the AC load 26. The high-voltage direct current of the power battery 22 is input into the bidirectional DC converter 211. Correspondingly, the bidirectional DC converter 211 steps down the high-voltage direct current to obtain low-voltage direct current and uses the low-voltage direct current to charge the battery 24.

[0093] Combined with Figure 3 , such as Figure 8 shown, is a schematic diagram of the current flow direction of a battery detection system 20 in the low-voltage charging mode according to an exemplary embodiment.

[0094] Specifically, when the mode of the battery detection system 20 is the low-voltage charging mode, as Figure 8 shown, the high-voltage direct current provided by the power battery 22 is input into the bidirectional DC converter 211. Correspondingly, the bidirectional DC converter 211 steps down the high-voltage direct current to obtain low-voltage direct current and uses the low-voltage direct current to charge the battery 24.

[0095] The embodiment of the present application also provides a vehicle, which includes the above-mentioned battery detection system 20.

[0096] In some other embodiments, as Figure 9 shown, is a power supply replenishment system 30 according to an exemplary embodiment. In Figure 9 , the power supply replenishment system 30 includes an inverter device 31 and a DC converter 32. In Figure 9 , the inverter device 31 is respectively connected to the DC converter 32, the power battery 33, and the mains interface 34. The DC converter 32 is connected to the battery 35. The power supply replenishment system 30 is used to charge the power battery 33 and the battery 35, and supply the electric energy of the power battery 33 to the mains.

[0097] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery detection system, characterized in that, The battery detection system (20) includes a charge and discharge circuit (21), a power battery (22), and a detection device (23), and the power battery (22) is connected to the charge and discharge circuit (21) and the detection device (23) respectively; When the battery detection system (20) is in the detection mode, the charge and discharge circuit (21) is configured to: send a detection signal to the power battery (22); The detection device (23) is configured to: receive a feedback signal for determining the battery life of the power battery (22); the feedback signal is generated by the power battery (22) based on the applied detection signal; The battery detection system (20) further includes a storage battery (24); The charge and discharge circuit (21) includes a bidirectional DC converter (211), one end of the bidirectional DC converter (211) is connected to the power battery (22), and the other end of the bidirectional DC converter (211) is connected to the storage battery (24); When the battery detection system (20) is in the detection mode, the bidirectional DC converter (211) is configured to: generate the detection signal and send the detection signal to the power battery (22); The detection signal is a high-voltage pulse current, and the bidirectional DC converter (211) is specifically configured to: generate the high-voltage pulse current according to the low-voltage direct current provided by the storage battery (24) and send the high-voltage pulse current to the power battery (22); The charge and discharge circuit (21) further includes an inverter device (212), one end of the inverter device (212) is configured to be connected to the mains interface (25), the other end of the inverter device (212) is configured to be connected to the power battery (22), and is also connected to the bidirectional DC converter (211).

2. The battery detection system (20) according to claim 1, wherein, When the battery detection system (20) is in the AC charging mode, the inverter device (212) is configured to: convert the mains power into a first direct current, and use the first direct current to charge the power battery (22) and provide the first direct current to the bidirectional DC converter (211); The bidirectional DC converter (211) is further configured to: step down the first direct current to obtain a second direct current, and use the second direct current to charge the storage battery (24).

3. The battery detection system (20) according to claim 1, wherein One end of the inverter device (212) is further configured to be connected to an AC load (26); when the battery detection system (20) is in the discharge mode, the charge and discharge circuit (21) is further configured to: convert the direct current provided by the power battery (22) into an alternating current through the inverter device (212) and supply power to the AC load (26) using the alternating current.

4. The battery detection system (20) according to claim 1, characterized in that, When the battery detection system (20) is in the low-voltage charging mode, the bidirectional DC converter (211) is further configured to: step down the direct current provided by the power battery (22) to obtain a third direct current, and use the third direct current to charge the storage battery (24).

5. The battery detection system (20) according to any one of claims 1-3, characterized in that, The detection device (23) is further configured to determine the battery life of the power battery (22) according to the feedback signal and the detection signal.

6. The battery detection system (20) according to any one of claims 1-3, characterized in that, The inverter device (212) includes a rectifier-inverter circuit and a resonant circuit.

7. A battery detection method, characterized in that, Applied to the battery detection system (20) according to any one of claims 1-6; the method includes: When the battery detection system (20) is in the detection mode, the detection signal is sent to the power battery (22) by using the charge and discharge circuit (21). The detection device (23) is used to receive the feedback signal for determining the battery life of the power battery (22); the feedback signal is generated by the power battery (22) based on the applied detection signal. The charge and discharge circuit (21) of the battery detection system (20) includes a bidirectional DC converter (211), the battery detection system (20) further includes a storage battery (24), and the method further includes: The bidirectional DC converter (211) is used to generate the detection signal and send the detection signal to the power battery (22).

8. A vehicle, characterized in that, Including the battery detection system (20) according to any one of claims 1-6.

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