Charging control method, device and system and vehicle

Abstract

The invention discloses a charging control method, device and system and a vehicle, and the method comprises the steps: obtaining the first state data of a first battery, and the first state data comprises the voltage of the first battery; determining a residual capacity detection result of the first battery according to second state data, wherein the second state data comprises historical state data; when the residual capacity detection result shows that the residual capacity detection is not accurate, determining the charging state of the first battery according to the voltage of the first battery and the load connected with the first battery; and when it is determined that the charging state of the first battery is to be charged, controlling the second battery to charge the first battery.

Description

Charging control method, device, system and vehicle Technical Field

[0001] The present application relates to the field of mechanical and electronic technology, and in particular to a charging control method, device, system and vehicle. Background Art

[0002] With the rapid development of vehicle technology, the number of functional loads in vehicles has gradually increased. These functional loads and most control devices are powered by the vehicle's low-voltage battery. However, the low-voltage battery has a limited capacity to store electrical energy. When the low-voltage battery runs low on energy, it can only stop supplying power to some loads, affecting vehicle operation.

[0003] In order to ensure that the electric energy stored in the low-voltage battery in the vehicle can meet the power supply needs of the vehicle's low-voltage loads, it is necessary to regularly recharge the low-voltage battery. At present, the existing low-voltage battery recharging methods mostly use a fixed voltage recharging threshold or a capacity recharging threshold. When the voltage across the low-voltage battery is lower than the voltage recharging threshold, or the remaining capacity (state of charge, SOC) of the low-voltage battery is less than the capacity recharging threshold, the high-voltage battery in the vehicle is controlled to charge the low-voltage battery to replenish the electric energy stored in the low-voltage battery. This low-voltage battery recharging method is mainly achieved by detecting whether the voltage or remaining capacity of the low-voltage battery exceeds the set recharging threshold. It can only meet the charging needs in specific scenarios. When the vehicle application scenario changes, the above-mentioned fixed recharging threshold recharging method may cause the low-voltage battery to be depleted or frequently charge the low-voltage battery, which may seriously affect the normal operation of the vehicle.

[0004] Summary of the Invention

[0005] The present application provides a charging control method, device, system and vehicle, which can avoid low-voltage battery power outages or frequent charging, and ensure that the power of the low-voltage battery can meet the power supply needs of the vehicle.

[0006] In the first aspect, an embodiment of the present application provides a charging control method, which can be applied to an electric device and executed by a controller in the electric device, specifically including the following steps: obtaining first status data of a first battery, the first status data including the voltage of the first battery; determining a remaining capacity detection result of the first battery based on second status data, the second status data including historical status data; when the remaining capacity detection result indicates that the remaining capacity detection is inaccurate, determining the charging status of the first battery based on the voltage of the first battery and the load connected to the first battery; when it is determined that the first battery needs to be recharged, controlling the second battery to recharge the first battery.

[0007] By using the above method, the historical status data of the first battery can be used to determine whether the remaining capacity of the detected first battery is accurate. When it is determined that the remaining capacity value is inaccurate, the first battery can be recharged based on the voltage of the first battery and the load that affects the voltage amplitude of the first battery. This can meet the recharge needs of the first battery in scenarios such as inaccurate remaining capacity detection or changes in the power supply load of the first battery.

[0008] In one possible implementation, the charging state of the first battery is determined based on the voltage of the first battery and the load connected to the first battery, including: detecting the state of the electric device, the state of the electric device includes a sleep state or a wake-up state; when it is determined that the electric device is in a sleep state, determining the charging state of the first battery based on the voltage of the first battery and a first preset voltage threshold, the first preset voltage threshold being the voltage drop generated by the load running when the electric device is in a sleep state; or when it is determined that the electric device is in a wake-up state, determining the charging state of the first battery based on the voltage of the first battery and a second preset voltage threshold, the second preset voltage threshold being the voltage drop generated by the load running when the electric device is in a wake-up state.

[0009] Using this method, when the electric device is in a dormant state and an awake state, the number of loads powered by the first battery varies, and the rate at which the voltage amplitude of the first battery decreases also varies. Therefore, the state of the electric device can be used to differentiate the loads powered by the first battery, and different preset voltage thresholds can be set as the conditions for determining whether to recharge the battery, thereby meeting the recharge requirements of the first battery under different loads.

[0010] In one possible implementation, the charging status of the first battery is determined based on the voltage of the first voltage and the load connected to the first battery, including: when it is determined that the electric device is in a sleep state and the voltage of the first battery is less than a first preset voltage threshold, controlling the electric device to enter a wake-up state and determining that the charging status is to be charged; or when it is determined that the electric device is in a wake-up state and the voltage of the first battery is less than a second preset voltage threshold, determining that the charging status is to be charged.

[0011] By using the above method, the power supply load of the first battery can be distinguished by the state of the electric equipment, and different preset voltage thresholds can be set for different loads as recharging judgment conditions. When the voltage amplitude of the first battery is less than the set preset voltage amplitude, recharging is performed, thereby meeting the recharging needs of the first battery in different load scenarios.

[0012] In one possible implementation, the method further includes: when the remaining capacity detection result indicates that the remaining capacity detection is accurate, determining the charging state of the first battery based on the remaining capacity and the aging degree of the first battery, where the aging degree indicates the ability of the first battery to store electrical energy.

[0013] Using the above method, when determining the accuracy of the detected remaining capacity of the first battery, the remaining capacity of the first battery is used as a recharge detection condition. As the first battery is used, it gradually ages, and the maximum remaining capacity of the first battery gradually decreases. To avoid frequent recharges of the first battery, the aging of the first battery can be used as a recharge determination condition, thereby reducing recharge losses in the electric device.

[0014] In one possible implementation, the charging state of the first battery is determined based on the remaining capacity and the aging degree of the first battery, including: determining a preset capacity threshold corresponding to the aging degree of the first battery based on the aging degree of the first battery; when the remaining capacity of the first battery is less than the preset capacity threshold, determining the charging state to be waiting for charging.

[0015] Using the above method, each aging degree corresponds to a maximum remaining capacity of the first battery. In order to avoid frequent recharging of the first battery due to a decrease in the maximum remaining capacity of the first battery due to severe aging, a preset capacity threshold can be configured for the aging degree as a recharging condition, thereby meeting the recharging needs of the first battery in the scenario of aging changes.

[0016] In a possible implementation, the method further includes: when the remaining capacity detection result indicates that the remaining capacity detection is accurate, determining a charging state of the first battery according to the aging degree of the first battery, the remaining capacity, and the voltage of the first battery.

[0017] Using the above method, during the recharge detection process of the first battery, the first battery continues to power the load, causing the remaining capacity of the first battery to decrease. This results in a difference between the remaining capacity in the first state data and the actual remaining capacity of the first battery due to the detection delay. The voltage amplitude of the first battery can be used as delay compensation to ensure the accuracy of the detection result.

[0018] In one possible implementation, the charging state of the first battery is determined based on the aging degree, the remaining capacity and the voltage of the first battery, including: determining a preset capacity threshold corresponding to the aging degree of the first battery based on the aging degree of the first battery; if the electric device is in a dormant state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a third preset voltage threshold, determining that the charging state is to be charged; the third preset voltage threshold is the voltage drop generated by the load running when the electric device is in a dormant state; or if the electric device is in an awake state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a fourth preset voltage threshold, determining that the charging state is to be charged, and the fourth preset voltage threshold is the voltage drop generated by the load running when the electric device is in an awake state.

[0019] When the voltage of the first battery is used as delay compensation using the above method, since the voltage amplitude of the first battery is related to the load powered by the first battery, and the number of loads powered by the first battery is different when the electric device is in the sleep state and the awake state, specific delay compensation can be performed in combination with the state of the electric device.

[0020] In one possible implementation, the remaining capacity detection result of the first battery is determined based on the second state data, including: obtaining the first remaining capacity, the second remaining capacity and the charged amount in the second state data, the first remaining capacity being the remaining capacity of the first battery before the previous charging, and the second remaining capacity being the remaining capacity of the first battery after the previous charging; when the difference between the sum of the first remaining capacity and the charged amount and the second remaining capacity is less than or equal to a preset threshold, determining that the remaining capacity detection result indicates that the remaining capacity detection is accurate; when the difference between the sum of the first remaining capacity and the charged amount and the second remaining capacity is greater than the preset threshold, determining that the remaining capacity detection result indicates that the remaining capacity detection is inaccurate.

[0021] Using the above method, the remaining capacity of the first battery before and after the last recharge is compared with the actual recharge capacity. When the difference is detected to be greater than the preset threshold of the allowable error, it indicates that there is a difference between the detected remaining capacity of the first battery and the actual remaining capacity, and the detected remaining capacity cannot be used as a recharge detection condition.

[0022] In a possible implementation, controlling the second battery to recharge the first battery includes: sending a recharge request to a controller, where the recharge request is used to instruct the controller to control the second battery to recharge the first battery.

[0023] In one possible implementation, controlling the second battery to recharge the first battery includes: sending a first signal to a battery management system in the electric device, where the first signal is used to instruct the battery management system to control the second battery to recharge the first battery.

[0024] In a second aspect, an embodiment of the present application provides a charging control device, comprising at least one processor coupled to at least one memory; the at least one processor comprising an acquisition unit and a processing unit. The acquisition unit is configured to acquire first status data of a first battery, the first status data comprising the voltage of the first battery; the processing unit is configured to determine a remaining capacity detection result of the first battery based on the second status data, the second status data comprising historical status data; when the remaining capacity detection result indicates inaccurate remaining capacity detection, determining a charging status of the first battery based on the voltage of the first battery and a load connected to the first battery; and when the charging status of the first battery is determined to be waiting for charging, controlling the second battery to charge the first battery.

[0025] In one possible implementation, the processing unit is specifically used to: detect the state of the electric device, the state of the electric device includes a sleep state or a wake-up state; when it is determined that the electric device is in a sleep state, determine the charging state of the first battery based on the voltage of the first battery and a first preset voltage threshold, and the first preset voltage threshold is the voltage drop generated by the load running when the electric device is in a sleep state; or when it is determined that the electric device is in a wake-up state, determine the charging state of the first battery based on the voltage of the first battery and a second preset voltage threshold, and the second preset voltage threshold is the voltage drop generated by the load running when the electric device is in a wake-up state.

[0026] In one possible implementation, the processing unit is specifically used to: when it is determined that the electric device is in a sleep state and the voltage of the first battery is less than a first preset voltage threshold, control the electric device to enter a wake-up state and determine that the charging state is to be charged; or when it is determined that the electric device is in a wake-up state and the voltage of the first battery is less than a second preset voltage threshold, determine that the charging state is to be charged.

[0027] In one possible implementation, the processing unit is further used to: when the remaining capacity detection result indicates that the remaining capacity detection is accurate, determine the charging status of the first battery based on the remaining capacity and the aging degree of the first battery, and the aging degree indicates the ability of the first battery to store electrical energy.

[0028] In one possible implementation, the processing unit is specifically configured to: determine a preset capacity threshold corresponding to the aging degree of a first battery according to the aging degree of a battery; and determine that the charging state is waiting for charging when the remaining capacity of the first battery is less than the preset capacity threshold.

[0029] In a possible implementation, the processing unit is further configured to: when the remaining capacity detection result indicates that the remaining capacity detection is accurate, determine the charging state of the first battery according to the aging degree of the first battery, the remaining capacity, and the voltage of the first battery.

[0030] In one possible implementation, the processing unit is specifically used to: determine a preset capacity threshold corresponding to the aging degree of the first battery based on the aging degree of the first battery; if the electric device is in a dormant state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a third preset voltage threshold, determine that the charging state is to be charged; the third preset voltage threshold is the voltage drop generated by the load running when the electric device is in a dormant state; or if the electric device is in an awake state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a fourth preset voltage threshold, determine that the charging state is to be charged, and the fourth preset voltage threshold is the voltage drop generated by the load running when the electric device is in an awake state.

[0031] In one possible implementation, the processing unit is specifically used to: obtain the first remaining capacity, the second remaining capacity and the recharged capacity in the second state data, the first remaining capacity being the remaining capacity of the first battery before the previous recharge, and the second remaining capacity being the remaining capacity of the first battery after the previous recharge; when the difference between the sum of the first remaining capacity and the recharged capacity and the second remaining capacity is less than or equal to a preset threshold, determine that the remaining capacity detection result indicates that the remaining capacity detection is accurate; when the difference between the sum of the first remaining capacity and the recharged capacity and the second remaining capacity is greater than the preset threshold, determine that the remaining capacity detection result indicates that the remaining capacity detection is inaccurate.

[0032] In a possible implementation, the processing unit is specifically configured to send a power replenishment request to the controller, where the power replenishment request is used to instruct the controller to control the second battery to replenish power for the first battery.

[0033] In a possible implementation, the processing unit is specifically configured to send a first signal to a battery management system in the electric device, where the first signal is configured to instruct the battery management system to control the second battery to recharge the first battery.

[0034] In a third aspect, an embodiment of the present application provides a charging control system, which includes a first battery and a controller, wherein the first controller is used to execute the method in the first aspect and any possible design of the first aspect.

[0035] In a fourth aspect, an embodiment of the present application provides a vehicle comprising a first battery and a charging control device as in the second aspect and any possible design of the second aspect.

[0036] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which includes a computer program or instructions. When a computer reads and executes the computer program or instructions, the computer executes the method in the first aspect and any possible design in the first aspect.

[0037] In a sixth aspect, an embodiment of the present application provides a computer storage product, which, when the computer program product runs on a computer, enables the computer to execute the method in the first aspect and any possible design of the first aspect.

[0038] For the beneficial effects of the second to sixth aspects mentioned above, please refer to the technical effects that can be achieved by the corresponding design in the first aspect mentioned above, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0040] FIG2 is a schematic diagram of electric energy during a low-voltage battery charging process provided by an embodiment of the present application;

[0041] FIG3 is a flow chart of a charging control method according to an embodiment of the present application;

[0042] FIG4 is a second flow chart of a charging control method provided in an embodiment of the present application;

[0043] FIG5 is a third flow chart of a charging control method provided in an embodiment of the present application;

[0044] FIG6 is a fourth flow chart of a charging control method provided in an embodiment of the present application;

[0045] FIG7 is a fifth flow chart of a charging control method provided in an embodiment of the present application;

[0046] FIG8 is a structural schematic diagram 1 of a charging control device provided in an embodiment of the present application;

[0047] FIG9 is a second structural diagram of a charging control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The terms used in the implementation methods of this application are only used to explain the specific embodiments of the present application and are not intended to limit this application. Obviously, the embodiments described are only some embodiments of the present application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0049] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are 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. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application as detailed in the appended claims.

[0050] Below, some terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0051] (1) In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar to it.

[0052] (2) The switch tube in the embodiment of the present application may be one or more of various types of switch tubes such as a relay, a metal oxide semiconductor field effect transistor (MOSFET), a bipolar junction transistor (BJT), an insulated gate bipolar transistor (IGBT), a silicon carbide (SiC) transistor, etc., which are not listed one by one in the embodiment of the present application. The packaging form of each switch tube may be a single tube package or a multi-tube package, which is not limited in the embodiment of the present application. Each switch tube may include a first end, a second end and a control end, wherein the control end is used to control the conduction or disconnection of the switch tube. When the switch tube is turned on, current can be transmitted between the first end and the second end of the switch tube, and when the switch tube is turned off, current cannot be transmitted between the first end and the second end of the switch tube. Taking MOSFET as an example, the control end of the switch tube is the gate, the first end of the switch tube may be the source, and the second end may be the drain, or the first end may be the drain, and the second end may be the source.

[0053] (3) In the embodiments of the present application, “connection” can be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be either a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. For example, the connection between A and B can also be a direct connection between A and C, and C and B can be directly connected, with A and B connected through C. The “connection” in the embodiments of the present application can also be understood as a wireless connection, that is, the connection between two electrical components can be an electromagnetic connection between the two electrical components.

[0054] (4) Direct current and alternating current. Direct current in the embodiments of the present application refers to an electrical form in which electric energy is conducted in a circuit in a constant direction. The conduction direction of electric energy is also called phase, and the phase of direct current can be positive or negative. The electric energy intensity of most direct currents is fixed. In some special direct currents (such as pulsed direct current), the electric energy intensity will also change with time. The electric energy intensity is also called current amplitude. Common direct current power sources include dry cells, storage batteries or direct current generators. Alternating current in the embodiments of the present application refers to an electrical form in which electric energy is conducted in a circuit in a periodically changing direction. The electric energy intensity of most alternating currents will also change periodically with time. The periodic change in the conduction direction of alternating current is limited by the frequency of alternating current. When the frequency of alternating current is higher, the alternating current can change the conduction direction faster, and when the frequency of alternating current is lower, the alternating current can change the conduction direction slowly. Common alternating current power sources include mains electricity, industrial and agricultural power supplies, residential power supplies, etc.

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The solution provided in the embodiments of the present application is applied to an electric device that is internally configured with a first battery and a second battery. The first battery and the second battery are both secondary batteries, and the rated voltage of the first battery is less than the rated voltage of the second battery. Among them, the electric device includes but is not limited to: vehicles, robots, industrial equipment, smart factory equipment, etc. The vehicles provided in the embodiments of the present application may include one or more different types of transportation vehicles or movable objects that operate or move on land (for example, highways, roads, railways, etc.), water surfaces (for example: waterways, rivers, oceans, etc.) or space. For example, the transportation vehicle may include a vehicle, a bicycle, a motorcycle, a train, a subway, an airplane, a ship, an aircraft, or other types of transportation vehicles or movable objects.

[0056] In the following, taking the vehicle as an example, the vehicle provided in the embodiment of the present application can be a new energy vehicle, including but not limited to: pure electric vehicle (pure electric vehicle / battery electric vehicle, pure EV / battery EV), hybrid electric vehicle (hybrid electric vehicle, HEV), range extended electric vehicle (range extended electric vehicle, REEV), plug-in hybrid electric vehicle (plug-in hybrid electric vehicle, PHEV) or other new energy vehicles (new energy vehicle, NEV), etc.

[0057] Figure 1 illustrates a schematic diagram of a vehicle structure. As shown in Figure 1 , a vehicle 10 primarily includes an on-board charger (OBC) 11, at least one low-voltage load module 12, a power battery module 13, a power system 14, wheels 15, a low-voltage battery 16, and a control module 17.

[0058] It should be understood that the structure of vehicle 10 shown in FIG1 is merely an example, and that vehicle 10 may have more or fewer components than shown in FIG1 , may combine two or more components, or may have a different component configuration. The various components shown in FIG1 may be implemented in hardware, including one or more signal processing and / or application specific integrated circuits, software, or a combination of hardware and software.

[0059] The power battery module 13 may include a power battery and a battery management system (BMS). The BMS manages the charge and discharge of the power battery. The BMS may also include a battery detection unit to monitor the operation of the power battery. Power batteries, also known as high-voltage batteries, are large-capacity, high-power storage batteries.

[0060] The power battery may be a secondary battery. Secondary batteries include, but are not limited to, lithium-ion batteries, sodium-ion batteries, potassium-ion batteries, magnesium-ion batteries, calcium-ion batteries, air batteries, lead-acid batteries, nickel-cadmium batteries, and supercapacitors. This application does not limit the specific type of secondary battery; any device capable of performing charge and discharge functions is acceptable.

[0061] The power system 14 may generally include gears, bearings, a differential, one or more motors, etc. When the vehicle 10 is traveling, the power battery can power the power system 14. The motor in the power system 14 converts the received electrical energy into mechanical energy and drives the wheels 15 of the vehicle 10 through the gears, bearings, and differential, thereby achieving movement of the vehicle 10.

[0062] The low-voltage load module 12 can be a functional load or other type of load within the vehicle 10, and the rated voltage of the low-voltage load module 12 is much lower than the rated voltage of the power battery. Each low-voltage load module 12 can include, but is not limited to, a control system, an autonomous driving system, an in-vehicle navigation system, an in-vehicle radio, etc.

[0063] When the vehicle 10 is charging, the vehicle 10 can generally be charged through the charging pile 20. Similar to the relationship between a gas station and a conventional car, the charging pile can "refuel" the new energy vehicle, that is, it can charge the vehicle. Continuing to refer to Figure 1, the charging pile 20 mainly includes a power supply circuit 21 and a charging gun 23. The input end of the power supply circuit 21 can receive the alternating current provided by the industrial frequency power grid, and the output end of the power supply circuit 21 is connected to the charging gun 22 through a cable. Generally speaking, when the charging gun 22 is inserted into the charging port of the vehicle 10, the power circuit 21 can convert the received alternating current into charging power that is compatible with the vehicle 10. The charging power converted by the power circuit 21 can be input into OBC11 through the charging gun 22. For example, the power circuit 21 can output alternating current power or direct current power through the charging gun 22.

[0064] The OBC 11 supplies a portion of the received charging energy to the power battery, which then stores this energy. In some scenarios, the OBC 11 may also supply another portion of the received charging energy to the low-voltage battery 16, which is a secondary battery. The low-voltage battery 16 can store this energy, and the low-voltage load module 12 can use the stored energy from the low-voltage battery 16 to operate.

[0065] In some scenarios, the OBC 11 may be equipped with a first conversion module and a second conversion module. The first conversion module receives AC power from an AC charging station and regulates the voltage of the AC power. The second conversion module receives the AC power regulated by the first conversion module and rectifies the AC power to generate the DC charging power required by the power battery, thereby charging the power battery.

[0066] In practical applications, the first and second conversion modules are each composed of multiple switching devices. The operating states of the first and second conversion modules can be adjusted by regulating the operating states of these devices. Specifically, the OBC may include a controller that provides drive signals to the switching devices and adjusts the operating states of the switching devices using these drive signals.

[0067] In one example, the OBC 11 may also include one or more auxiliary components that assist the controller in adjusting the operating state of the switching components. For example, the auxiliary component may be a voltage sampling circuit that detects the voltage output by the conversion module in the OBC. When the voltage output by the conversion module fails to meet charging requirements, the controller may adjust the operating state of the switching components to adjust the output voltage of the conversion module in the OBC.

[0068] The OBC 11 may also include a high-voltage power distribution unit (PDU), which can distribute and manage the received electrical energy. For example, the PDU can provide the received electrical energy to the power battery to charge the power battery.

[0069] The control module 17 may include any one of a vehicle control unit (VCU), a microcontroller unit (MCU), a central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), etc., or may be any one or more combinations of other programmable logic devices, transistor logic devices, and hardware components. The control module 17 may control some or all of the modules in the vehicle 10. For example, it may control the power battery module 13 to supply power to the power system 14.

[0070] The low-voltage battery 16 can be a secondary battery, and its rated voltage is lower than that of the high-voltage battery. The low-voltage battery 16 supplies power to multiple low-voltage load modules 12 within the vehicle. It should be understood that the term "low-voltage battery" in this application is only used to define a voltage amplitude less than the rated voltage of the high-voltage battery. For example, the rated voltage of the low-voltage battery can be, but is not limited to, 12V, 24V, and 48V.

[0071] The multiple low-voltage load modules 12 in the vehicle 10 are mostly functional loads. In order to achieve the normal operation of the vehicle 10, the electric energy stored in the low-voltage battery 16 needs to meet the power supply needs of the vehicle 10. As shown in Figure 2, during the operation of the vehicle 10, the power battery module 13 in the vehicle 10 can charge the low-voltage battery 16 and supply power to the low-voltage load module 12. When the vehicle 10 stops moving, the low-voltage load module 12 is mainly powered by the low-voltage battery 16. Since the energy storage capacity of the low-voltage battery 16 is limited, it is necessary to regularly control the power battery module 13 to replenish the power of the low-voltage battery 16 in order to meet the power supply needs of the low-voltage load module 12. Among them, when the vehicle 10 is in parking gear, the charging pile is charging the vehicle 10, or the vehicle 10 is undergoing fault maintenance, the vehicle 10 will stop moving.

[0072] In actual use, because the rated voltage of the low-voltage load module 12 is much lower than the rated voltage of the power battery in the power battery module 13, if the power battery is used directly to power the low-voltage load module 12, the output voltage will be insufficient to meet the power requirements of the low-voltage load module 12. Therefore, the vehicle may also include a DC converter. As shown in Figure 2, the DC converter is connected between the power battery module 13 and the low-voltage battery 16, and between the power battery module 13 and the low-voltage load module 12. Before the power battery supplies power to the low-voltage battery module 12, the DC converter first regulates the voltage output by the power battery to output a voltage suitable for the low-voltage load module 13.

[0073] Currently, a common method for recharging low-voltage batteries is to set a fixed recharging threshold. When the voltage or remaining capacity of the low-voltage battery 16 falls below the recharging threshold, the power battery module 13 is controlled to recharge the low-voltage battery 16. However, if the load connected to the low-voltage battery 16 changes or the internal data of the low-voltage battery 16 changes, the recharging scheme with the fixed recharging threshold cannot meet the recharging needs of the low-voltage battery, which may cause the low-voltage battery 16 to run low or require frequent recharging of the low-voltage battery 16, shortening the service life of the low-voltage battery 16 or increasing the recharging loss of the vehicle 10. In severe cases, it may affect the normal operation of the vehicle.

[0074] In view of this, the embodiments of the present application provide a charging control method, device, system and vehicle, which are used to comprehensively judge whether the battery needs to be recharged based on the load of the battery in the electric equipment, the accuracy of the remaining capacity of the low-voltage battery, the power supply load conditions, etc., to meet the recharge needs of the electric equipment in multiple scenarios and reduce the recharge loss of the electric equipment.

[0075] The charging control method provided in the embodiment of the present application can be implemented by the control device of the electric device. The electric device control device can be an independent device, or it can implement a control chip or component in the electric device, or it can be a software module. The embodiment of the present application does not limit the product form and deployment method of the electric device control device. In the following, for the sake of ease of understanding and description, the charging control scheme of the embodiment of the present application is introduced by taking the electric device as a vehicle and the control device as a vehicle control unit (VCU) or a body control module (BCM) as an example.

[0076] As shown in Figure 3, a flow chart of a charging control method provided in an embodiment of the present application is shown. Referring to Figure 3, the charging control method may include the following steps:

[0077] S301: Acquire first status data of a first battery, wherein the first status data includes the voltage of the first battery and the SOC of the first battery. The first battery is a low-voltage battery in the vehicle.

[0078] Specifically, the acquisition of the above-mentioned first state data can be achieved through the interaction between the charging control method execution device and other devices in the vehicle. For example, the VCU or BCM can obtain the operating parameters of the first battery through the vehicle's sensor system or the sensor system of the first battery, and always maintain monitoring and data collection of the operating status of the first battery. Among them, the voltage sensor, current sensor, temperature sensor, and battery sensor (electronic battery sensor, EBS) can also be a combination of multiple sensors with different functions. The multiple operating parameters of the first battery obtained by the above-mentioned sensor system can be, but are not limited to: voltage, SOC, temperature, etc.

[0079] In one example, if the control device that executes the charging control method is in an awake state for a long time, the sensor system can directly send the first status data representing the operating status of the first battery to the control device so that the first controller 36 can perform a recharge detection.

[0080] In another example, in order to reduce the operating loss of the electric device, the control device that executes the charging control method may be in a dormant state. The sensor system may periodically detect and wake up the control device, and output the detected first state to the control device.

[0081] The sensor system's detection interval can be set based on the last time the first battery was recharged, the recharged capacity of the first battery, and the power supply status of the first battery. For example, if the recharged capacity of the first battery is 80% and the power supply status of the first battery is consuming 10% of its rated capacity per minute, the first status data detection can be performed 8 minutes in advance. When the control device determines that recharging is no longer necessary, the detection interval can be gradually reduced to avoid the first battery being depleted due to missed recharging times.

[0082] S302: Determine a residual capacity detection result of the first battery according to second status data, wherein the second status data includes historical status data.

[0083] The second state data may also be acquired through a sensor system of the vehicle or a sensor system of the first battery.

[0084] In practical applications, the second status data may include historical status data from one or more previous charging processes of the first battery, and the SOC accuracy test can be performed based on the data parameters during the first battery charging process. The historical status data may include a first remaining capacity SOC1, a second remaining capacity SOC2, and a charging capacity SOC3.

[0085] In one example, in order to obtain the latest test result of the first battery, the SOC accuracy test can be performed using the previous charging history status of the first battery. Specifically, SOC1 is the SOC of the first battery before the last low-voltage battery charging, and SOC2 is the SOC of the first battery after the last charging. When the difference between the sum of SOC1 and SOC2, SOC4, and SOC3 is less than or equal to a preset threshold, the SOC test result of the first battery is determined to be an accurate SOC test; when the difference between the sum of SOC1 and SOC2, SOC4, and the second remaining capacity, SOC3, is greater than a preset threshold, the SOC test result of the first battery is determined to be an inaccurate SOC test. Among them, the preset threshold can be the SOC detection delay and the allowable detection error, and its specific value can be set by the operator or calculated through multiple charge and discharge data of the first battery.

[0086] In another example, in order to prevent a single inaccurate detection, the SOC accuracy test can be performed using the previous multiple power-up history of the first battery. The following calculation is performed on the data before and after each power-up. When the difference between the sum of SOC1 and SOC2, SOC4, and SOC3, is less than or equal to the preset threshold, the SOC detection result of the first battery is determined to be an accurate SOC detection; when the difference between the sum of SOC1 and SOC2, SOC4, and the second remaining capacity, SOC3, is greater than the preset threshold, the SOC detection result of the first battery is determined to be an inaccurate SOC detection. The SOC accuracy test result is determined based on the number of accurate SOC detections. For example, if the number of detections is 4 and the SOC detection results are accurate 3 times, it can be determined that the SOC detection result is accurate.

[0087] S303: When the remaining capacity detection result indicates that the remaining capacity detection is inaccurate, determining a charging state of the first battery according to the voltage of the first battery and a load connected to the first battery.

[0088] It should be understood that the voltage amplitude of the first battery is related to the load powered by the first battery. The more load the first battery supplies, the faster the SOC of the first battery depletes, and accordingly, the faster the voltage amplitude of the first battery decreases. Therefore, to avoid untimely or frequent recharging due to changes in the load supplied by the first battery, different recharging voltage thresholds can be set for the first battery based on the load connected to the low-voltage battery as a recharging judgment condition.

[0089] S304: When it is determined that the charging state of the first battery is waiting for charging, control the second battery to charge the first battery.

[0090] In one example, when the charging control method is executed by a vehicle control unit (VCU), it can be implemented through interaction between the VCU and a battery management system (BMS). For example, the VCU sends a first signal to the BMS, instructing the BMS to control the second battery to output stored energy to the first battery. The second battery can be a high-voltage battery of the vehicle.

[0091] In one example, when the charging control method is executed by a BCM, it can be implemented through interaction between the BCM and the VCU. For example, the BCM can send a recharge request to the VCU, instructing to recharge the first battery. Upon receiving the recharge request, the VCU can output the energy stored in the second battery to the first battery through the BCM.

[0092] As can be seen from the above description, the charging control scheme provided in the embodiments of the present application includes two recharge detection processes: the first is a recharge detection process in which the SOC value of the first battery is accurately detected, and the second is a recharge detection process in which the SOC value of the first battery is inaccurate. The following describes in detail the two recharge detection processes of the first controller 36 in conjunction with the embodiments.

[0093] In one embodiment provided in the present application, when the SOC detection result of the first battery indicates that the SOC detection of the first battery is inaccurate, the charging status of the first battery can be determined based on the voltage of the first battery and the load connected to the first battery. When it is determined that the charging status of the first battery is to be charged, the second battery is controlled to charge the first battery.

[0094] It should be understood that the voltage amplitude of the first battery is related to the load powered by the first battery. The more load the first battery powers, the faster the capacity of the first battery is consumed, and accordingly, the faster the voltage amplitude of the first battery decreases. For example, when the load connected to the first battery is rated at 20W, the SOC decrease rate is less than the SOC decrease rate when the stable power of the load connected to the first battery is 40W. Therefore, in order to avoid untimely or frequent recharging due to changes in the load powered by the first battery, different recharging voltage thresholds can be set for the first battery according to the load connected to the first battery as a recharging judgment condition.

[0095] In practical applications, the load of the first battery is related to the state of the electric device, which can be in a dormant state and an awake state. Because multiple components within the electric device are also dormant when the electric device is in the dormant state, the number of loads powered by the first battery when the electric device is awake is greater than the number of loads powered by the first battery when the electric device is in the dormant state. Therefore, different recharge detection reference values ​​can be configured for these loads.

[0096] Specifically, the state of the electric device is detected, where the state of the electric device includes a dormant state or an awake state. When it is determined that the electric device is in the dormant state, the charging state of the first battery is determined based on the voltage of the first battery and a first preset voltage threshold, where the first preset voltage threshold is the voltage drop generated by the load running when the electric device is in the dormant state. Alternatively, when it is determined that the electric device is in the awake state, the charging state of the first battery is determined based on the voltage of the first battery and a second preset voltage threshold, where the second preset voltage threshold is the voltage drop generated by the load running when the electric device is in the awake state. The values ​​of the first preset capacity threshold and the second preset capacity threshold can be configured based on state data of the low-voltage battery 31 during multiple charge and discharge processes.

[0097] In actual application, when it is determined that the electric device is in the sleep state and the voltage of the first battery is less than the first preset voltage threshold, the electric device is controlled to enter the wake-up state, and the charging state is determined to be waiting for charging; or when it is determined that the electric device is in the wake-up state and the voltage of the first battery is less than the second preset voltage threshold, the charging state is determined to be waiting for charging.

[0098] In combination with the above description, when the SOC detection of the first battery is inaccurate, if the execution subject of the charging control method is the VCU, the charging detection process of the first battery can be shown in Figure 4. As shown in Figure 4, it specifically includes the following steps:

[0099] S401: Acquire first status data of a first battery.

[0100] Specifically, the VCU may obtain the first status data of the first battery through the sensor system of the electric device or the sensor system of the first battery. If the VCU is in an awake state for a long time, the sensor system may directly output the first status data to the VCU. If the VCU is in a dormant state, the sensor system periodically wakes up the VCU and outputs the first status data to the VCU.

[0101] S402: Detect whether the electric device is in a dormant state. If so, execute S403; otherwise, execute S405.

[0102] S403: Detect whether the voltage of the first battery is less than a first preset voltage threshold. If so, execute S404; otherwise, return to execute S401.

[0103] S404: Wake up the electric device and send a first signal to the BMS.

[0104] The first signal is used to instruct the BMS to output the electric energy stored in the second battery to the first battery through a voltage conversion device, thereby replenishing the first battery.

[0105] S405: Detect whether the voltage of the first battery is less than a second preset voltage threshold. If so, execute S406; otherwise, return to execute S401.

[0106] S406: Send a first signal to the BMS.

[0107] In combination with the above description, when the SOC detection of the first battery is inaccurate, if the execution subject of the charging control method is the BCM, the charging detection process of the first battery can be shown in Figure 5. As shown in Figure 5, it specifically includes the following steps:

[0108] S501: Acquire first status data of a first battery.

[0109] Specifically, the BCM may obtain first status data of the first battery through the sensor system of the first battery. If the BCM is in an awake state for a long time, the sensor system may directly output the first status data to the BCM. If the BCM is in a dormant state, the sensor system may periodically wake up the BCM and output the first status data to the BCM.

[0110] S502: Detect whether the electric device is in a dormant state. If so, execute S503; otherwise, execute S505.

[0111] S503: Detect whether the voltage of the first battery is less than a first preset voltage threshold. If so, execute S504; otherwise, return to execute S501.

[0112] S504: Wake up the electric device and send a power replenishment request to the VCU.

[0113] The power replenishment request is used to request power replenishment for the first battery. After receiving the power replenishment request, the VCU can output the electric energy stored in the second battery to the first battery through the BCM.

[0114] S505: Detect whether the voltage of the first battery is less than a second preset voltage threshold. If so, execute S506; otherwise, return to execute S501.

[0115] S506: Send a power replenishment request to the VCU.

[0116] In another embodiment provided herein, when the SOC test result of the first battery accurately indicates an SOC value, a recharge test can be performed on the first battery based on the first battery's aging and the SOC value in the first status data to determine the recharge status of the first battery. If the recharge status is determined to be waiting for recharge, the second battery can be controlled to recharge the first battery.

[0117] Specifically, according to the aging degree of the first battery, a preset capacity threshold corresponding to the aging degree of the first battery is determined; when the remaining capacity of the first battery is less than the preset capacity threshold, the charging state is determined to be waiting for charging.

[0118] The aging degree represents the ability of the first battery to store electrical energy. In this application, the rated capacity of the first battery can be used to represent the aging degree of the first battery. For example, an aging degree of 85% represents that the maximum SOC value of the first battery is 85% of the rated capacity of the first battery. As the first battery is used, the aging degree of the first battery will gradually decrease, and the more serious the aging of the first battery, the lower the aging degree of the first battery.

[0119] In one example, a health check may be performed on the first battery periodically, and the aging degree of the low-voltage battery may be determined based on the health check result.

[0120] In another example, the second battery may be periodically controlled to charge the first battery, and the aging degree of the first battery may be determined by detecting the SOC of the first battery after charging.

[0121] In actual application, as the aging value of the first battery decreases, the maximum SOC value of the first battery also decreases. In order to prevent the frequent recharging of the first battery due to changes in aging, different preset capacity thresholds can be set for different aging degrees of the first battery and used as recharging judgment conditions.

[0122] In one example, a correspondence table between the aging degree of the first battery and the preset capacity threshold can be set. The following takes the correspondence table between the aging degree and the preset capacity threshold as an example, in which two aging intervals are included. For example, the aging interval of the first battery is (80%, 100%], and the aging interval of the second battery is [60%, 80%). The preset capacity threshold corresponding to the first aging interval is the first preset capacity threshold SOC1, and the preset capacity threshold corresponding to the second aging interval is the second preset capacity threshold SOC2.

[0123] In the following, assuming that the SOC detection of the first battery is accurate, the charging detection process of the first battery is described by taking the table of correspondence between the aging degree and the preset capacity threshold value including two aging degree intervals as an example.

[0124] Specifically, if the aging degree of the first battery is within a first aging degree range, a first preset capacity threshold SOC1 corresponding to the first aging degree range is determined from a table of correspondences between aging degrees and preset capacity thresholds. When it is detected that the SOC in the first state data is less than the first preset capacity threshold SOC1, the charging state of the first battery is determined to be waiting for charging, and the second battery is controlled to charge the first battery. If the aging degree of the first battery is within a second aging degree range, a second preset capacity threshold SOC2 corresponding to the second aging degree range is determined from a table of correspondences between aging degrees and preset capacity thresholds. When it is detected that the SOC in the first state data is less than the second preset capacity threshold SOC2, the charging state of the first battery is determined to be waiting for charging, and the second battery is controlled to charge the first battery.

[0125] In one possible implementation, during the recharge detection process of the first battery, the first battery continues to power the load, which will cause the actual SOC value of the first battery to continue to decrease, resulting in a detection delay between the SOC value in the first state data and the actual SOC value of the first battery. In order to ensure the accuracy of the detection result, the voltage amplitude of the first battery can be used to compensate for the detection delay of the SOC value, that is, the control device uses the aging degree of the first battery, the SOC value and the voltage amplitude of the first battery to perform recharge detection on the first battery.

[0126] In actual use, the capacity loss of the first battery is mainly related to the load powered by the first battery. When using the voltage amplitude of the first battery to perform detection delay compensation, the voltage compensation value of the first battery can be set according to the load powered by the first battery to ensure the accuracy of the detection result.

[0127] Specifically, according to the aging degree of the first battery, the preset capacity threshold corresponding to the aging degree of the first battery is determined; if the electric device is in a dormant state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a third preset voltage threshold, the charging state is determined to be waiting for charging; the third preset voltage threshold is the voltage drop generated by the load running when the electric device is in a dormant state; or if the electric device is in an awake state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a fourth preset voltage threshold, the charging state is determined to be waiting for charging, and the fourth preset voltage threshold is the voltage drop generated by the load running when the electric device is in an awake state.

[0128] Specifically, the preset capacity threshold corresponding to the current aging degree of the first battery is detected. If the aging degree of the first battery is within the first aging degree interval in the table of correspondences between aging degrees and preset capacity thresholds, the first preset capacity threshold corresponding to the aging degree is SOC1. If the electric device is in a dormant state, when the SOC is detected to be less than SOC1 and the voltage of the first battery is less than a third preset voltage threshold, the charging state is determined to be waiting for charging. Alternatively, if the electric device is in an awake state, when the SOC is detected to be less than the preset capacity threshold and the voltage of the first battery is less than a fourth preset voltage threshold, the charging state of the first battery is determined to be waiting for charging. The third preset voltage threshold is the voltage drop generated by the load running when the vehicle is in a dormant state, and the fourth preset voltage threshold is the voltage drop generated by the load running when the vehicle is awake.

[0129] Specifically, the preset capacity threshold corresponding to the current aging degree of the first battery is detected. If the aging degree of the first battery is within the second aging degree interval in the table of correspondence between aging degree and preset capacity thresholds, the second preset capacity threshold corresponding to the aging degree is SOC2. If the electric device is in a dormant state, when it is detected that the SOC of the first battery is less than SOC2 and the voltage of the first battery is less than a third preset voltage threshold, the charging state of the first battery is determined to be waiting for charging. Alternatively, if the electric device is in an awake state, when it is detected that the SOC of the first battery is less than SOC2 and the voltage of the first battery is less than a fourth preset voltage threshold, the charging state of the first battery is determined to be waiting for charging.

[0130] It should be understood that the above embodiments of the present application utilize the state of the electric device to differentiate the load powered by the first battery and configure corresponding preset voltage thresholds as delay compensation. In actual application, two or more preset voltage thresholds can be configured based on the rated voltage and rated power of the actual load powered by the first battery, and this application does not specifically limit this.

[0131] In combination with the above description, when the SOC detection of the first battery is accurate, if the execution subject of the charging control prevention is the VCU, the charging detection process of the first battery can be shown in Figure 6. As shown in Figure 6, it specifically includes the following steps:

[0132] S601: Acquire first status data of a first battery.

[0133] S602: Detect whether the aging degree of the first battery is in a first aging degree range. If so, execute S603; otherwise, execute S608.

[0134] S603: Detect whether the electric device is in a dormant state. If so, execute S604; otherwise, execute S606.

[0135] S604: Detect whether the voltage of the first battery is less than a third preset voltage threshold. If so, execute S605; otherwise, return to execute S601.

[0136] S605: Wake up the electric device and send a first signal to the BMS.

[0137] S606: Detect whether the voltage of the first battery is less than a fourth preset voltage threshold. If so, execute S607; otherwise, return to execute S601.

[0138] S607: Send a first signal to the BMS.

[0139] S608: Detect whether the electric device is in a dormant state. If so, execute S609; otherwise, execute S610.

[0140] S609: Detect whether the voltage of the first battery is less than a third preset voltage threshold. If so, execute S605; otherwise, return to execute S601.

[0141] S610: Detect whether the voltage of the first battery is less than a fourth preset voltage threshold. If so, execute S607; otherwise, return to execute S601.

[0142] In combination with the above description, when the SOC detection of the first battery is accurate, if the execution subject of the charging control prevention is the BCM, the charging detection process of the first battery can be shown in Figure 7. As shown in Figure 7, it specifically includes the following steps:

[0143] S701: Acquire first status data of a first battery.

[0144] S702: Detect whether the aging degree of the first battery is in a first aging degree range. If so, execute S703; otherwise, execute S708.

[0145] S703: Detect whether the electric device is in a dormant state. If so, execute S704; otherwise, execute S706.

[0146] S704: Detect whether the voltage of the first battery is less than a third preset voltage threshold. If so, execute S705; otherwise, return to execute S701.

[0147] S705: Wake up the electric device and send a power replenishment request to the VCU.

[0148] S706: Detect whether the voltage of the first battery is less than a fourth preset voltage threshold. If so, execute S707; otherwise, return to execute S701.

[0149] S707: Send a power replenishment request to the VCU.

[0150] S708: Check whether the electric device is in a dormant state. If so, execute S709; otherwise, execute S710.

[0151] S709: Detect whether the voltage of the first battery is less than a third preset voltage threshold. If so, execute S705; otherwise, return to execute S701.

[0152] S710: Detect whether the voltage of the first battery is less than a fourth preset voltage threshold. If so, execute S707; otherwise, return to execute S701.

[0153] The embodiment of the present application also provides a charging control device, which can be used to execute the above method embodiment. The relevant features can be found in the above method embodiment and will not be repeated here.

[0154] As shown in Figure 8, in one example, the charging control device may include: an acquisition unit 801, used to acquire first status data of a first battery, the first status data including the voltage of the first battery; a processing unit 802, used to determine a remaining capacity detection result of the first battery based on second status data, the second status data including historical status data; when the remaining capacity detection result indicates that the remaining capacity detection is inaccurate, determining the charging status of the first battery based on the voltage of the first battery and the load connected to the first battery; when it is determined that the charging status of the first battery is to be charged, controlling the second battery to charge the first battery.

[0155] In one possible implementation, the processing unit 802 is specifically used to: detect the state of the electric device, the state of the electric device includes a sleep state or a wake-up state; when it is determined that the electric device is in a sleep state, determine the charging state of the first battery based on the voltage of the first battery and a first preset voltage threshold, and the first preset voltage threshold is the voltage drop generated by the load running when the electric device is in a sleep state; or when it is determined that the electric device is in a wake-up state, determine the charging state of the first battery based on the voltage of the first battery and a second preset voltage threshold, and the second preset voltage threshold is the voltage drop generated by the load running when the electric device is in a wake-up state.

[0156] In one possible implementation, the processing unit 802 is specifically used to: when it is determined that the electric device is in a sleep state and the voltage of the first battery is less than a first preset voltage threshold, control the electric device to enter a wake-up state and determine that the charging state is to be charged; or when it is determined that the electric device is in a wake-up state and the voltage of the first battery is less than a second preset voltage threshold, determine that the charging state is to be charged.

[0157] In one possible implementation, the processing unit 802 is further used to: when the remaining capacity detection result indicates that the remaining capacity detection is accurate, determine the charging status of the first battery based on the remaining capacity and the aging degree of the first battery, and the aging degree indicates the ability of the first battery to store electrical energy.

[0158] In one possible implementation, the processing unit 802 is specifically configured to: determine a preset capacity threshold corresponding to the aging degree of a first battery according to the aging degree of a battery; and determine that the charging state is waiting for charging when the remaining capacity of the first battery is less than the preset capacity threshold.

[0159] In a possible implementation, the processing unit 802 is further configured to: when the remaining capacity detection result indicates that the remaining capacity detection is accurate, determine the charging state of the first battery according to the aging degree of the first battery, the remaining capacity, and the voltage of the first battery.

[0160] In one possible implementation, the processing unit 802 is specifically used to: determine a preset capacity threshold corresponding to the aging degree of the first battery based on the aging degree of the first battery; if the electric device is in a dormant state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a third preset voltage threshold, determine that the charging state is to be charged; the third preset voltage threshold is the voltage drop generated by the load running when the electric device is in a dormant state; or if the electric device is in an awake state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a fourth preset voltage threshold, determine that the charging state is to be charged, and the fourth preset voltage threshold is the voltage drop generated by the load running when the electric device is in an awake state.

[0161] In one possible implementation, the processing unit 802 is specifically used to: obtain the first remaining capacity, the second remaining capacity and the replenished amount in the second state data, the first remaining capacity being the remaining capacity of the first battery before the previous replenishment, and the second remaining capacity being the remaining capacity of the first battery after the previous replenishment; when the difference between the sum of the first remaining capacity and the replenished amount and the second remaining capacity is less than or equal to a preset threshold, determine that the remaining capacity detection result indicates that the remaining capacity detection is accurate; when the difference between the sum of the first remaining capacity and the replenished amount and the second remaining capacity is greater than the preset threshold, determine that the remaining capacity detection result indicates that the remaining capacity detection is inaccurate.

[0162] In a possible implementation, the processing unit 802 is specifically configured to send a power replenishment request to the controller, where the power replenishment request is used to instruct the controller to control the second battery to replenish power for the first battery.

[0163] In a possible implementation, the processing unit 802 is specifically configured to send a first signal to a battery management system in the electric device, where the first signal is configured to instruct the battery management system to control the second battery to recharge the first battery.

[0164] For specific implementation methods, please refer to the method steps implemented by the vehicle control device in the above method embodiment, which will not be repeated here.

[0165] It should be understood that the division of the various units in the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into a physical entity, or they can be physically separated. In addition, the units in the device can be implemented in the form of a processor calling software; for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or realize the functions of the various units of the device, where the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units can be realized by designing the hardware circuits. The hardware circuit can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units by designing the logical relationship of the components in the circuit. For another example, in another implementation, the hardware circuit can be implemented by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units. All units of the above devices can be implemented in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0166] In an embodiment of the present application, a processor is a circuit with a signal processing capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a CPU, a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by an ASIC or PLD, such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0167] It can be seen that each unit in the above device can be one or more processors (or processing circuits) configured to implement the above method, such as: CPU, GPU, NPU, TPU, DPU, microprocessor, DSP, ASIC, FPGA, or a combination of at least two of these processor forms.

[0168] In addition, the various units in the above devices can be fully or partially integrated together, or can be implemented independently. In one implementation, these units are integrated together and implemented in the form of a system-on-a-chip (SOC). The SOC may include at least one processor for implementing any of the above methods or implementing the functions of the various units of the device. The type of the at least one processor can be different, for example, including a CPU and FPGA, a CPU and an artificial intelligence processor, a CPU and a GPU, etc.

[0169] In a simple embodiment, those skilled in the art may conceive that the charging control devices in the above embodiments may all adopt the form shown in FIG. 9 .

[0170] The apparatus 900 shown in FIG9 includes at least one processor 910 and a communication interface 930. In an optional design, a memory 920 may also be included.

[0171] The embodiment of the present application does not limit the specific connection medium between the processor 910 and the memory 920.

[0172] In the apparatus shown in FIG. 9 , the processor 910 may transmit data through the communication interface 930 when communicating with other devices.

[0173] When the charging control device adopts the form shown in FIG9 , the processor 910 in FIG9 can call the computer-executable instructions stored in the memory 920 so that the device 900 can execute any of the above method embodiments.

[0174] An embodiment of the present application also relates to a charging control system, which may include a first battery and a controller, and the controller may execute the method of any of the above embodiments.

[0175] An embodiment of the present application also relates to a vehicle, which includes a first battery and the above-mentioned charging control device, and the charging control device can execute the method of any of the above-mentioned embodiments.

[0176] In one possible implementation, an embodiment of the present application provides a computer-readable storage medium, which stores program code. When the program code runs on the computer, the computer executes the above method embodiment.

[0177] In a possible implementation, an embodiment of the present application provides a computer program product. When the computer program product is run on a computer, the computer is caused to execute the above method embodiment.

[0178] Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0179] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0180] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0181] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these changes and variations. In the various embodiments of the present application, unless otherwise specified or logically conflicting, the terms and / or descriptions between the various embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

Claims

1. A charging control method, applied to electric equipment, characterized in that: The method comprises: Acquire first status data of a first battery, where the first status data includes a voltage of the first battery; determining a residual capacity detection result of the first battery according to second status data, wherein the second status data includes historical status data; When the remaining capacity detection result indicates that the remaining capacity detection is inaccurate, determining a charging state of the first battery according to the voltage of the first battery and a load connected to the first battery; When it is determined that the charging state of the first battery is to be charged, the second battery is controlled to charge the first battery.

2. The method according to claim 1, wherein The determining the charging state of the first battery according to the voltage of the first battery and the load connected to the first battery includes: Detecting a state of the electric device, where the state of the electric device includes a dormant state or an awake state; When it is determined that the electric device is in the dormant state, determining the charging state of the first battery according to the voltage of the first battery and a first preset voltage threshold, where the first preset voltage threshold is a voltage drop generated by a load running when the electric device is in the dormant state; or When it is determined that the electric device is in the awake state, the charging state of the first battery is determined based on the voltage of the first battery and a second preset voltage threshold, where the second preset voltage threshold is the voltage drop generated by the load running when the electric device is in the awake state.

3. The method according to claim 2, wherein The determining the charging state of the first battery according to the first voltage and the load connected to the first battery includes: When it is determined that the electric device is in the dormant state and the voltage of the first battery is less than the first preset voltage threshold, controlling the electric device to enter the awake state and determining the charging state to be waiting for charging; or When it is determined that the electric device is in the awake state and the voltage of the first battery is less than the second preset voltage threshold, the charging state is determined to be waiting for charging.

4. The method according to any one of claims 1 to 3, wherein: The method further comprises: When the remaining capacity detection result indicates that the remaining capacity detection is accurate, the charging state of the first battery is determined according to the remaining capacity and the aging degree of the first battery, where the aging degree indicates the ability of the first battery to store electrical energy.

5. The method according to claim 4, wherein The determining, based on the remaining capacity and the aging degree of the first battery, a charging state of the first battery includes: determining, according to the aging degree of the first battery, a preset capacity threshold corresponding to the aging degree of the first battery; When the remaining capacity of the first battery is less than the preset capacity threshold, the charging state is determined to be waiting for charging.

6. The method according to claim 1, wherein The method further comprises: When the remaining capacity detection result indicates that the remaining capacity detection is accurate, the charging state of the first battery is determined according to the aging degree of the first battery, the remaining capacity, and the voltage of the first battery.

7. The method according to claim 6, wherein The determining the charging state of the first battery according to the aging degree of the first battery, the remaining capacity, and the voltage of the first battery includes: determining, according to the aging degree of the first battery, a preset capacity threshold corresponding to the aging degree of the first battery; If the electric device is in a dormant state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than a third preset voltage threshold, the charging state is determined to be waiting for charging; the third preset voltage threshold is the voltage drop generated by the load running when the electric device is in a dormant state; or If the electric device is in the awake state, when it is detected that the remaining capacity is less than the preset capacity threshold and the voltage of the first battery is less than the fourth preset voltage threshold, the charging state is determined to be waiting for charging, and the fourth preset voltage threshold is the voltage drop generated by the load running when the electric device is in the awake state.

8. The method according to any one of claims 1 to 7, wherein: The determining the remaining capacity detection result of the first battery according to the second status data includes: Obtaining a first remaining capacity, a second remaining capacity, and a charge amount in the second state data, where the first remaining capacity is the remaining capacity of the first battery before a previous charge, and the second remaining capacity is the remaining capacity of the first battery after a previous charge; When the difference between the sum of the first remaining capacity and the replenished capacity and the second remaining capacity is less than or equal to a preset threshold, determining that the remaining capacity detection result indicates that the remaining capacity detection is accurate; When the difference between the sum of the first remaining capacity and the replenishment amount and the second remaining capacity is greater than the preset threshold, it is determined that the remaining capacity detection result indicates that the remaining capacity detection is inaccurate.

9. The method according to any one of claims 1 to 8, wherein: The controlling the second battery to supplement power for the first battery includes: A power replenishment request is sent to the controller, where the power replenishment request is used to instruct the controller to control the second battery to replenish power for the first battery.

10. The method according to any one of claims 1 to 8, wherein: The controlling the second battery to supplement power for the first battery includes: A first signal is sent to a battery management system in the electric device, where the first signal is used to instruct the battery management system to control the second battery to supplement power for the first battery.

11. A charging control device, characterized in that: The device comprises at least one processor coupled to at least one memory; the at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the device performs the method according to any one of claims 1 to 10.

12. A charging control system, characterized in that: The device comprises a first battery and a controller, wherein the first controller is configured to execute the method according to any one of claims 1 to 10.

13. A vehicle, characterized in that: The device comprises a first battery and the charge control device according to claim 11.

14. A computer-readable storage medium, characterized in that The method comprises a computer program or instructions, which, when read and executed by a computer, causes the computer to perform the method according to any one of claims 1 to 10.

15. A computer storage product, characterized in that: When the computer program product is run on a computer, the computer is caused to perform the method according to any one of claims 1 to 10.

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