Battery detection system, battery detection method and vehicle

Abstract

The invention 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 comprises a charging and discharging circuit, transmitting equipment and detection equipment, wherein the charging and discharging circuit is respectively connected with the transmitting equipment and the detection equipment. When the battery detection system is in a detection mode, the charging and discharging circuit is configured to supply power to the transmitting device. And a transmitting device configured to transmit the detection signal to the battery device. And a detection device configured to receive a feedback signal for determining a battery life of the battery device. The feedback signal is generated by the battery device based on the applied detection signal. The accuracy of the determined service life of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, in particular to the field of vehicle detection technology, and specifically to a battery detection system, a battery detection method and a vehicle. Background Art

[0002] New energy vehicles use power batteries as an important power source. When the power battery life of the vehicle 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 a power battery, a related technical solution discloses a method for predicting the remaining life of lithium ions, the method comprising: taking a battery to be tested, and performing a cyclic charging and discharging test on the battery to be tested at a set current and voltage under a set working environment, collecting the number of cycles and the battery capacity data after each cycle; determining the remaining life of the battery based on the acquired battery capacity data and a preset formula. A method for intelligent monitoring of automotive batteries based on Internet of Vehicles big data technology is also disclosed, the method comprising: obtaining battery parameters such as battery voltage, current, and state of charge, and bringing the battery parameters into a life calculation model to obtain the battery life. Since this method directly brings the collected battery parameters into the existing life calculation model for calculation, it does not take into account the characteristics of different batteries and different vehicles, resulting in a low accuracy of the determined battery life. 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 the first aspect provided by the present application, a battery detection system is provided, the battery detection system includes a charge and discharge circuit, a transmitter and a detection device, the charge and discharge circuit is connected to the transmitter and the detection device respectively, and the transmitter is configured to be connected to the battery device. When the battery detection system is in a detection mode, the charge and discharge circuit is configured to: supply power to the transmitter. The transmitter is configured to: send a detection signal to the battery device. The detection device is configured to: receive a feedback signal for determining the battery life of the battery device. The feedback signal is generated by the battery device based on the applied detection signal.

[0006] According to the above technical means, a detection signal is sent to the battery device through the transmitting device, and the battery life of the battery device is determined based on the feedback signal sent by the battery device. After the detection signal passes through the battery device, it will change according to the characteristics of the battery device, and a feedback signal is obtained. In this way, since the feedback signal can accurately reflect the battery characteristics of the battery device, the battery life of the battery device can be determined based on the battery characteristics of the battery device, thereby improving the accuracy of the determined battery life. In addition, the charging and discharging circuit connects the transmitting device and the detection device, that is, in addition to the power supply function of the battery detection system itself, the battery detection system also integrates an electrochemical impedance measurement transmission function, and the transmitting device is powered by the charging and discharging circuit of the battery detection system itself, without adding a new power module in the vehicle, thereby reducing costs.

[0007] In one possible embodiment, the charging and discharging circuit includes an inverter device, one end of which is configured to be connected to a mains power interface and to a transmitting device, and the other end of which is configured to be connected to a power battery and to a detection device.

[0008] In one possible manner, the charging and discharging circuit is specifically configured to: convert the first direct current of the power battery into the first alternating current through an inverter device, and use the first alternating current to supply power to the transmitting device. The transmitting device is further configured to: generate a detection signal according to the first alternating current.

[0009] According to the above technical means, the first DC power of the power battery is converted into the first AC power to provide the transmitter with AC power for generating the detection signal. In this way, the transmitter is powered by the power battery of the driving vehicle, and there is no need to configure a power module for the transmitter 22 separately, thereby reducing costs.

[0010] In one possible manner, the battery device is a power battery, and the power battery is connected to a transmitting device through a first line, and is connected to a detection device through a second line. The transmitting device is specifically configured to: send a detection signal to the power battery through the first line. The detection device is specifically configured to: receive a feedback signal sent by the power battery through the second line.

[0011] In one possible manner, when the battery detection system is in the charging mode, the charging and discharging circuit is further configured to: convert the AC power into a second DC power through an inverter device, and use the second DC power to charge the power battery.

[0012] According to the above technical means, the charging and discharging system of the power battery and the battery detection system are integrated into one system, and there is no need to add a new battery detection system, thereby reducing the cost of the vehicle.

[0013] In one possible manner, when the battery detection system is in the discharge mode, the charge and discharge circuit is further configured to: convert the first direct current provided by the power battery into the second alternating current through the inverter device, and use the second alternating current to supply power to the AC load.

[0014] In one possible manner, the charging and discharging circuit further includes a DC converter. The DC converter is configured to be connected to the power battery and the storage battery respectively. The DC converter is configured to: step down the DC power to be stepped down to obtain the stepped down DC power, and use the stepped down DC power to charge the storage battery.

[0015] In one possible manner, a battery is connected to the detection device, and the battery is configured to supply power to the detection device.

[0016] In one possible manner, the inverter device 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 as in the first aspect. The method includes: when the battery detection system is in a detection mode, using a charging and discharging circuit to power a transmitting device, and using the transmitting device to send a detection signal to a battery device. Using the detection device to receive a feedback signal for determining the battery life of the battery device. The feedback signal is generated by the battery device based on the applied detection signal.

[0018] In one possible embodiment, the charging and discharging circuit of the battery detection system includes an inverter device, and the method further includes: when the battery detection system is in a discharge mode, using the inverter device to convert the first direct current of the power battery into a second alternating current, and using the second alternating current to power the AC load.

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

[0020] According to the fourth aspect provided by the present application, there is provided a vehicle-mounted power system, comprising a power battery, a storage battery and a battery detection system as in the first aspect. The power battery is respectively connected to a transmitting device, a charging and discharging circuit and a detection device of the battery detection system. The storage battery is connected to the charging and discharging circuit of the battery detection system.

[0021] It should be noted that the technical effects brought about by any implementation method in the second to fourth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0024] Figure 1 is a schematic structural diagram of an electrochemical impedance measurement system according to an exemplary embodiment;

[0025] Figure 2 is one of the structural schematic diagrams of a battery detection system according to an exemplary embodiment;

[0026] Figure 3 is a second structural schematic diagram of a battery detection system according to an exemplary embodiment;

[0027] Figure 4 is a schematic diagram showing the connection between a power battery, a transmitting device and a detecting device according to an exemplary embodiment;

[0028] Figure 5 is a flowchart of a battery detection method according to an exemplary embodiment;

[0029] Figure 6 is a schematic diagram showing the flow direction of current in a battery detection system in a detection mode according to an exemplary embodiment;

[0030] Figure 7 is a schematic diagram showing the flow direction of current of a battery detection system in a first charging mode according to an exemplary embodiment;

[0031] Figure 8 is a schematic diagram showing the flow direction of current in a battery detection system in a discharge mode according to an exemplary embodiment;

[0032] Fig. 9 is a schematic diagram showing the flow direction of current of a battery detection system in a second charging mode according to an exemplary embodiment;

[0033] Fig.10 is a structural schematic diagram of a vehicle-mounted power system according to an exemplary embodiment;

[0034] Fig.11 It is a structural schematic diagram of a power supply system according to an exemplary embodiment. DETAILED DESCRIPTION

[0035] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, 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 merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0037] As described in the background art, the accuracy of the current life determination method by introducing battery parameters into the life calculation model is low. In order to improve the accuracy of battery life, the related art discloses an electrochemical impedance measurement system. Figure 1 As shown, Figure 1 An electrochemical impedance measurement system 10 is shown, comprising: a power supply device 11, a transmitter device 12, a detection device 13 and a battery device 14. The transmitter device 12 is connected to the power supply device 11, the detection device 13 and the battery device 14 (such as a power battery) respectively, and the detection device 13 is connected to the battery device 14.

[0038] 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. Accordingly, the battery device 14 is applied with the detection signal, and after the detection signal passes through the battery device 14, the battery device 14 outputs a feedback signal to the detection device 13. The feedback signal is generated after the detection signal passes through the battery device 14.

[0039] Subsequently, the detection device 13 receives a feedback signal from the battery device 14, and determines the service life of the battery device 14 based on the feedback signal. In this way, after the detection signal passes through the battery device 14, it will change according to the characteristics of the battery device 14 (such as the cell resistance and capacitance), and obtain a feedback signal. In this way, according to the changes in the detection signal and the feedback signal, the current real state of the battery device 14 can be determined, thereby obtaining a more accurate service life of the battery device 14.

[0040] However, in the electrochemical impedance measurement system 10 , a power supply device 11 needs to be added to the vehicle, which results in an increase in the cost of the entire vehicle.

[0041] In order to solve the above technical problems, Figure 2 As shown, the present application provides a battery detection system 20. Figure 2In the embodiment, the battery detection system 20 includes a charge and discharge circuit 21, a transmitter 22 and a detection device 23. The charge and discharge circuit 21 is connected to the transmitter 22 and the detection device 23 respectively. The transmitter 22 is configured to be connected to the battery device 24.

[0042] When the battery detection system 20 is in the detection mode, the charge and discharge circuit 21 is configured to supply power to the transmitting device 22 .

[0043] As a possible implementation method, in response to a battery detection instruction, the battery detection system 20 is controlled to enter a detection mode, and when the battery detection system 20 is in the detection mode, the charge and discharge circuit 21 is configured to supply power to the transmitting device 22 .

[0044] In some embodiments, when the battery life of the battery device 24 is determined, the charge and discharge circuit 21 is controlled to provide AC power to the transmitting device 22 .

[0045] In some embodiments, Figure 3 As shown, the charge and discharge circuit 21 includes an inverter device 211, which is configured to be connected to a power battery 213. When the battery life of the detection battery device 24 is determined, the first direct current output by the power battery 213 is converted into a first alternating current by the inverter device 211, and the first alternating current is used to supply power to the transmitter device 22.

[0046] In the embodiment of the present application, the first alternating current may be 220V alternating current, or may be alternating current of other numerical values, which is not limited in the embodiment of the present application.

[0047] In some other embodiments, when the charging and discharging circuit 21 is connected to the mains, the mains is used to supply power to the transmitting device 22 .

[0048] It can be understood that when the battery detection system 20 is in the non-detection mode, the charge and discharge circuit 21 stops supplying power to the transmitting device 22 .

[0049] The transmitting device 22 is configured to send a detection signal to the battery device 24 .

[0050] In some embodiments, the transmitting device 22 converts the alternating current provided by the charging and discharging circuit 21 into a detection signal according to a preset signal generation algorithm, and sends the detection signal to the battery device 24 .

[0051] In other embodiments, the transmitting device 22, in response to the signal generation instruction, converts the AC power provided by the charging and discharging circuit 21 into a detection signal corresponding to the signal generation instruction according to the signal generation instruction, and sends the detection signal to the battery device 24. The signal generation instruction is used to instruct the transmitting device 22 to generate a detection signal with specific characteristics, and the detection signal with specific characteristics is related to the battery parameters (such as voltage, current or impedance) of the battery device 24.

[0052] Specifically, the processor of the vehicle where the battery detection system 20 is located obtains 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 transmitting device 22.

[0053] Alternatively, the transmitting device 22 obtains the battery parameters of the battery device 24, and obtains the characteristics of the detection signal according to the battery parameters and the signal determination algorithm. Further, the transmitting device 22 generates the detection signal according to the characteristics of the detection signal.

[0054] For example, the transmitting device 22 generates a pulse current having a target spectrum according to the model, current voltage, and current of the battery device 24 .

[0055] It should be noted that the preset signal generation algorithm and the signal determination algorithm are pre-configured by the operation and maintenance personnel. The detection signal may be a pulse current.

[0056] In some embodiments, the transmitting device 22 may also output pulse currents of different spectra according to detection requirements. For example, the transmitting device 22 may output different pulse currents according to different battery parameters of the battery device 24 .

[0057] In some embodiments, the transmitter 22 is connected to the battery device 24 via a bus bar, and the transmitter 22 sends a detection signal to the battery device 24 via the bus bar.

[0058] In other embodiments, the transmitting device 22 transmits the detection signal to the battery device 24 via wireless transmission. For example, the transmitting device 22 generates a wireless detection signal and sends the wireless detection signal to the battery device 24 via an antenna.

[0059] The detection device 23 is configured to receive a feedback signal for determining the battery life of the battery device 24 .

[0060] The feedback signal is generated by the battery device 24 based on the applied detection signal.

[0061] In the embodiment of the present application, the feedback signal is a signal obtained by changing the detection signal after passing through the battery device 24. For example, the detection signal is a first pulse current, and after the first pulse current is applied to the battery device 24 and passes through the battery cell of the battery device 24, the first pulse current changes to a second pulse current. Subsequently, the battery device 24 sends a second pulse signal to the detection device 23.

[0062] As a possible implementation manner, the detection device 23 is configured to: receive a feedback signal from the battery device 24, and determine the battery life of the battery device 24 according to the feedback signal.

[0063] In some embodiments, the detection device 23 is configured to collect voltage and current parameters returned from the power battery, parse the electrochemical impedance spectrum of the battery device based on the voltage and current parameters, and calculate information related to the battery device based on the electrochemical impedance spectrum, such as calculating the battery life of the battery device.

[0064] In some embodiments, the detection device 23 obtains the first signal feature of the feedback signal, and determines the battery life of the battery device 24 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 battery device 24.

[0065] In other embodiments, the detection device 23 sends a feedback signal to a processor of the vehicle. Subsequently, the processor determines the battery life of the battery device 24 according to the feedback signal.

[0066] Alternatively, the detection device 23 sends a feedback signal to the server via the communication device. Accordingly, the server determines the battery life of the battery device 24 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. Accordingly, the vehicle receives the detection result from the server and displays the detection result.

[0067] In some embodiments, the detection device 23 may be located in the battery device 24 or outside the battery device 24, which is not limited in the embodiments of the present application.

[0068] The battery detection system provided in the embodiment of the present application brings at least the following beneficial effects: a detection signal is sent to the battery device 24 through the transmitting device 22, and the battery life of the battery device is determined according to the feedback signal sent by the battery device 24. In this way, the battery life is determined by the electrochemical impedance measurement method. Since the detection signal changes according to the characteristics of the battery device 24 after passing through the battery device 24, a feedback signal is obtained. In this way, since the feedback signal can accurately reflect the battery characteristics of the battery device 24, the battery life of the battery device 24 is determined according to the battery characteristics of the battery device 24, thereby improving the accuracy of the determined battery life. In addition, the charging and discharging circuit 21 connects the transmitting device 22 and the detection device 23, that is, in addition to the power supply function of the battery detection system itself, the battery detection system also integrates the electrochemical impedance measurement transmission function, and the transmitting device 22 is powered by the charging and discharging circuit 21 of the battery detection system itself, without adding a power module in the vehicle, reducing the cost.

[0069] In one design, Figure 3 As shown, one end of the inverter device 211 is connected to the mains interface 212 and the transmitting device 22 , and the other end of the inverter device 211 is connected to the power battery 213 and the detecting device 23 .

[0070] The charging and discharging circuit 21 is specifically configured to: convert the first direct current provided by the power battery 213 into the first alternating current through the inverter device 211 , and use the first alternating current to supply power to the transmitting device 22 .

[0071] In some embodiments, when the battery detection system 20 is in the detection mode, the power battery 213 outputs the first direct current. Accordingly, the first direct current provided by the power battery 213 is converted into the first alternating current by the inverter 211, and the first alternating current is used to supply power to the transmitter 22.

[0072] The transmitting device 22 is further configured to generate a detection signal according to the first alternating current.

[0073] The embodiment of the present application does not specifically limit the specific structure of the inverter device 211, and it only needs to be able to achieve AC to DC conversion and DC to AC conversion. For example, the inverter device 211 includes a rectifier inverter circuit and a resonant circuit. Alternatively, the inverter device 211 includes a power factor correction circuit and a resonant circuit.

[0074] In the embodiment of the present application, the power battery 213 can also be used as a power source to provide power for the vehicle.

[0075] It can be understood that the first direct current of the power battery 213 is converted into the first alternating current to provide the transmitting device 22 with alternating current for generating the detection signal. In this way, the transmitting device 22 is powered by the power battery 213 of the driving vehicle, and there is no need to configure a power module for the transmitting device 22 separately, thereby reducing the cost.

[0076] In one design, the battery device is a power battery 213. Figure 3 As shown, the power battery 213 is connected to the transmitting device 22 through a first line, and is connected to the detecting device 23 through a second line.

[0077] The transmitting device 22 is specifically configured to send a detection signal to the power battery 213 through a first line.

[0078] The detection device 23 is specifically configured to receive a feedback signal sent by the power battery 213 through a second line.

[0079] In one design, when the battery detection system 20 is in the charging mode, the charging and discharging circuit 21 is further configured to: convert the AC power into a second DC power through the inverter 211, and use the second DC power to charge the power battery 213.

[0080] It can be understood that by integrating the charging system of the power battery 213 and the battery detection system into one system, there is no need to add a separate battery detection system, thereby reducing the cost of the vehicle.

[0081] In one design, when the battery detection system 20 is in the discharge mode, the charge and discharge circuit 21 is further configured to: convert the first direct current provided by the power battery 213 into a second alternating current through the inverter 211, and use the second alternating current to discharge through the mains interface.

[0082] In one design, Figure 3 As shown, the charge and discharge circuit 21 further includes a DC converter 215. The DC converter 215 is configured to be connected to the power battery 213 and the storage battery 214 respectively. The DC converter 215 is configured to: step down the DC power to be stepped down to obtain the stepped down DC power, and use the stepped down DC power to charge the storage battery 214.

[0083] In one design, the battery 214 is connected to the detection device 23 , and the battery 214 is configured to supply power to the detection device 23 .

[0084] On this basis, a battery detection method provided by the present application is applied to the above-mentioned battery detection system 20, such as Figure 5 , the battery detection method includes: S501-S503.

[0085] S501 : When the battery detection system is in the detection mode, the charging and discharging circuit 21 is used to supply power to the transmitting device 22 .

[0086] S502 : Use the transmitting device 22 to send a detection signal to the battery device 24 .

[0087] S503 : Utilize the detection device 23 to receive a feedback signal for determining the battery life of the battery device 24 .

[0088] The feedback signal is generated by the battery device 24 based on the applied detection signal.

[0089] In one design, the battery detection method provided in the embodiment of the present application includes: S504-S505.

[0090] S504: When the battery detection system is in the discharge mode, use an inverter device to convert the first direct current of the power battery into the second alternating current.

[0091] S505 : Use the second alternating current to supply power to the AC load 216 .

[0092] In order to better understand the battery detection system 20 and the operation mode of the battery detection system 20 provided in the embodiment of the present application, a schematic diagram of the operation of the battery detection system 20 in different operation modes is provided below.

[0093] Combination Figure 3 ,like Figure 6 , which is a schematic diagram showing the flow direction of current in a battery detection system 20 in a detection mode.

[0094] Specifically, when the battery detection system 20 is in the detection mode, Figure 6 As shown, the first direct current (eg, high voltage direct current) provided by the power battery 213 is input into the inverter device 211. The inverter device 211 outputs 220V alternating current to the transmitting device 22.

[0095] Accordingly, the transmitting device 22 outputs a first pulse current having a target spectrum to the power battery 213 according to the demand. Subsequently, the power battery 213 outputs a second pulse current to the detection device 23 .

[0096] In addition, the first direct current of the power battery 213 is stepped down by the direct current converter 215 to obtain low-voltage direct current, and the low-voltage direct current is used to charge the battery.

[0097] Combination Figure 3 ,like Figure 7 As shown, Figure 7 A schematic diagram showing the flow direction of current of a battery detection system 20 in a first charging mode is shown.

[0098] Specifically, when the mode of the battery detection system 20 is the first charging mode, Figure 7 As shown, the mains ( Figure 7 220V AC) is input into the inverter device 211. The inverter device 211 outputs high-voltage DC power to charge the power battery 213. In addition, the inverter device 211 also inputs high-voltage DC power to the DC converter 215. The DC converter 215 steps down the high-voltage DC power to obtain low-voltage DC power, and uses the low-voltage DC power to charge the battery.

[0099] It can be understood that the first charging mode is an AC charging mode.

[0100] Combination Figure 3 ,like Figure 8 As shown, Figure 8 A schematic diagram showing the flow direction of current of a battery detection system 20 in a discharge mode is shown.

[0101] Specifically, when the battery detection system 20 is in the discharge mode, Figure 8 As shown, the high-voltage direct current provided by the power battery 213 is input into the inverter device 211. The inverter device 211 inverts the high-voltage direct current and supplies power to the AC load 216. The high-voltage direct current of the power battery 213 is input into the direct current converter 215. Accordingly, the direct current converter 215 steps down the high-voltage direct current to obtain low-voltage direct current, and uses the low-voltage direct current to charge the battery.

[0102] Combination Figure 3 ,like Fig. 9 As shown, Fig. 9 A schematic diagram showing the flow direction of current of the battery detection system 20 in the second discharge mode is shown.

[0103] Specifically, when the mode of the battery detection system 20 is the second charging mode, Fig. 9 As shown, the high-voltage direct current provided by the power battery 213 is input into the direct current converter 215. Accordingly, the direct current converter 215 steps down the voltage of the high-voltage direct current to obtain low-voltage direct current, and uses the low-voltage direct current to charge the battery.

[0104] It can be understood that the second charging mode is a low-voltage charging mode.

[0105] The present application also provides a vehicle-mounted power system, such as Fig.10 As shown, Fig.10A vehicle-mounted power system 30 is shown, including a power battery 213, a storage battery 214, and a transmitter 22, a charge and discharge circuit 21, and a detection device 23 of the battery detection system 20. The power battery 213 is respectively connected to the transmitter 22, the charge and discharge circuit 21, and the detection device 23 of the battery detection system 20. The storage battery 214 is connected to the charge and discharge circuit 21 of the battery detection system 20.

[0106] Specifically, the storage battery 214 is connected to the charging and discharging circuit 21 via a DC converter 215 .

[0107] An embodiment of the present application further provides a vehicle, which includes the above-mentioned battery detection system 20.

[0108] In other embodiments, Fig.11 As shown, Fig.11 A power supply system 40 for a vehicle is shown. Fig.11 In the embodiment, the power supply system 40 includes an inverter 41 and a DC converter 42. Fig.11 In the embodiment, the inverter device 41 is respectively connected to the DC converter 42, the power battery 43 and the mains interface 44. The DC converter 42 is connected to the storage battery 45. The power supply system 40 is used to charge the power battery 43 and the storage battery 45, and to provide the power of the power battery 43 to the mains.

[0109] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery detection system, characterized in that: The battery detection system (20) comprises a charge and discharge circuit (21), a transmitter (22) and a detection device (23), wherein the charge and discharge circuit (21) is connected to the transmitter (22) and the detection device (23) respectively, and the transmitter (22) is configured to be connected to a battery device (24); when the battery detection system (20) is in a detection mode, the charge and discharge circuit is configured to: supply power to the transmitter (22); The transmitting device (22) is configured to: send a detection signal to the battery device (24); The detection device (23) is configured to: receive a feedback signal for determining the battery life of the battery device (24); the feedback signal is generated by the battery device (24) based on the applied detection signal.

2. The battery detection system (20) according to claim 1, characterized in that: The charging and discharging circuit (21) comprises an inverter device (211), one end of the inverter device (211) being configured to be connected to a mains power interface (212) and also to be connected to the transmitting device (22), and the other end of the inverter device (211) being configured to be connected to a power battery (24) and also to be connected to the detecting device (23).

3. The battery detection system (20) according to claim 2, characterized in that: The charging and discharging circuit (21) is specifically configured to: convert the first direct current provided by the power battery (213) into a first alternating current through the inverter (211), and use the first alternating current to supply power to the transmitting device (22); The transmitting device (22) is further configured to generate the detection signal according to the first alternating current.

4. The battery detection system (20) according to claim 2, characterized in that: The battery device (24) is the power battery (213), and the power battery (213) is connected to the transmitting device (22) via a first line, and is connected to the detecting device (23) via a second line; The transmitting device (22) is specifically configured to: send the detection signal to the power battery (213) through the first line; The detection device (23) is specifically configured to: receive the feedback signal sent by the power battery (213) through the second line.

5. The battery detection system (20) according to claim 2, characterized in that: When the battery detection system (20) is in a charging mode, the charging and discharging circuit (21) is further configured to: convert the city power into a second direct current through the inverter (211), and use the second direct current to charge the power battery (213).

6. The battery detection system (20) according to claim 2, characterized in that: One end of the inverter device is also configured to be connected to an AC load; when the battery detection system (20) is in a discharge mode, the charge and discharge circuit (21) is also configured to: convert the first direct current provided by the power battery (213) into a second alternating current through the inverter device (211), and use the second alternating current to supply power to the AC load 216.

7. The system according to any one of claims 2 to 6, characterized in that: The charging and discharging circuit (21) further comprises a DC converter (215); the DC converter (215) is configured to be connected to the power battery (213) and the storage battery (214) respectively; The DC converter (215) is configured to: step down the DC power to be stepped down to obtain stepped-down DC power, and use the stepped-down DC power to charge the storage battery (214).

8. The battery detection system (20) according to claim 7, characterized in that: The storage battery (214) is connected to the detection device (23), and the storage battery (214) is configured to supply power to the detection device (23).

9. The system according to any one of claims 2 to 6, characterized in that: The inverter device (211) comprises a rectifier inverter circuit and a resonant circuit.

10. A battery detection method, characterized in that: A battery detection system (20) as claimed in any one of claims 1 to 9; the method comprising: When the battery detection system (20) is in a detection mode, the charging and discharging circuit (21) is used to power the transmitting device (22), and the transmitting device (22) is used to send the detection signal to the battery device (24); The detection device (23) is used to receive the feedback signal for determining the battery life of the battery device (24); the feedback signal is generated by the battery device (24) based on the applied detection signal.

11. The method according to claim 10, characterized in that The charging and discharging circuit (21) of the battery detection system (20) includes an inverter device (211), and the method further includes: When the battery detection system (20) is in a discharge mode, the inverter (211) is used to convert a first direct current of a power battery (213) into a second alternating current, and the second alternating current is used to supply power to an alternating current load 216.

12. A vehicle-mounted power system, characterized in that: Comprising a power battery (213), a storage battery (214) and a battery detection system (20) as claimed in any one of claims 1 to 9; The power battery (213) is respectively connected to the transmitting device (22), the charging and discharging circuit (21) and the detection device (23) of the battery detection system (20); The storage battery (214) is connected to the charging and discharging circuit (21) of the battery detection system (20).

13. A vehicle, characterized in that: The invention comprises a battery detection system (20) as claimed in any one of claims 1 to 9.

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