Control methods and devices

Abstract

This application provides a control method and apparatus. The method includes: acquiring first information, the first information including collision detection information indicating whether a collision has occurred at the terminal and / or operating status information of a power supply system, the operating status information of the power supply system including the state of charge of two low-voltage batteries and fault detection information of the power supply system; and controlling the operating states of a first switch, a second switch, and an isolating switch according to the first information. The power supply system includes a high-voltage battery, two low-voltage batteries, and two power supply buses; the first switch and the second switch respectively control the connection and disconnection between the two low-voltage batteries and the two power supply buses; the isolating switch is disposed in a circuit for connecting the two power supply buses and is used to control the connection and disconnection between the two power supply buses. Embodiments of this application can be applied to intelligent vehicles or new energy vehicles, enabling the power supply system to effectively meet the power demand in different scenarios and effectively ensure the service life of the low-voltage batteries.

Description

Technical Field

[0001] This application relates to the field of intelligent vehicle technology, and more specifically, to a control method and apparatus. Background Technology

[0002] With the continuous development of vehicle technology, on-board electrical equipment and systems are placing increasingly higher demands on on-board power supply systems. For example, in low-temperature environments, the current output capability of low-voltage batteries will decrease significantly, and power supply systems using a single low-voltage battery architecture may be unable to meet the power demand under low-temperature conditions.

[0003] Therefore, some vehicle power supply systems adopt a dual low-voltage battery architecture to improve the adaptability of the vehicle power supply system to various operating conditions. However, for power supply systems with a dual low-voltage battery architecture, if the power supply strategy is not reasonable, it may affect the lifespan of the low-voltage batteries. Summary of the Invention

[0004] This application provides a control method and apparatus that enables the power supply system to effectively meet the power demand in different scenarios and also effectively ensures the service life of the low-voltage battery in the power supply system.

[0005] In a first aspect, a control method is provided. The method includes: acquiring first information; and controlling the operating states of a first switch, a second switch, and an isolating switch based on the first information. The first information includes collision detection information and / or power supply system operating status information; the collision detection information indicates whether a collision has occurred at the terminal; the power supply system operating status information includes the state of charge of a first low-voltage battery, the state of charge of a second low-voltage battery, and fault detection information of the power supply system.

[0006] The power supply system may include a high-voltage battery, a first low-voltage battery, a second low-voltage battery, a first power supply bus, a second power supply bus, a first switch, a second switch, a DC-DC converter, and a first circuit for connecting the first power supply bus and the second power supply bus. The first low-voltage battery can be connected to the first power supply bus via the first switch, which can be used to control the on / off connection between the first low-voltage battery and the first power supply bus. The second low-voltage battery can be connected to the second power supply bus via the second switch, which can be used to control the on / off connection between the second low-voltage battery and the second power supply bus. The high-voltage battery can be connected to at least one of the first and second power supply buses via the DC-DC converter. The first circuit may include an isolating switch, which can be used to control the on / off connection between the first and second power supply buses.

[0007] In this application, based on one or more of the collision detection information, the state of charge of the first low-voltage battery, the state of charge of the second low-voltage battery, and the fault detection information of the power supply system, the on / off state of the first switch, the second switch, and the isolating switch in the power supply system can be flexibly controlled, so that the power supply system can effectively cope with the power demand under different scenarios (such as normal, short circuit fault, collision accident, etc.) and can also effectively improve the service life of the low-voltage battery in the power supply system.

[0008] In some implementations, the first information may include the operating status information of the power supply system. The power supply system can provide a first power supply through a first power supply bus and a second power supply through a second power supply bus. Based on the first information, controlling the operating status of the first switch, the second switch, and the disconnecting switch may include: when a short circuit fault occurs in the first power supply and / or the second power supply, controlling the disconnecting switch to be in the open state, and controlling the first switch and the second switch to be in the on state for a first time period.

[0009] Because short-circuit faults are random and sporadic, the first switch and / or the second switch may be in the open state before a short-circuit fault occurs in the power supply system; correspondingly, the first low-voltage battery and / or the second low-voltage battery may not be connected to the power supply bus.

[0010] In this application, when a short-circuit fault is detected in the first power supply and / or the second power supply, the disconnection of the two power supply buses can be achieved by controlling the disconnecting switch to open, thereby preventing interference from the short-circuited power supply to the other power supply. Furthermore, by controlling the first and second switches to be simultaneously turned on during a first time period, the first and second low-voltage batteries can respectively supply power to the two power supplies during that period. Thus, both power supplies in the power system can have power during that time period, preventing one power supply from losing power due to the disconnecting switch. In this way, the normal operation of the other power supply can be guaranteed when a short-circuit fault occurs in one power supply.

[0011] In some implementations, the method may further include: after the first time period, controlling at least one of the first and second power supplies to perform short-circuit protection for the one that has experienced a short-circuit fault.

[0012] In this application, short-circuit protection is provided for at least one power supply that has a short-circuit fault after the first time period, which can reduce the interference of the part with the short-circuit fault in the power supply system to the normal power consumption of other parts.

[0013] In some implementations, the first information may include collision detection information and power supply system operating status information. Based on the first information, the operating states of the first switch, the second switch, and the disconnecting switch are controlled, including: when no collision occurs at the terminal and neither the first nor the second power supply experiences a short circuit fault, controlling the disconnecting switch and the first switch to be in a conducting state, and controlling the operating state of the second switch based on the state of charge of the first low-voltage battery.

[0014] In a power supply system employing a dual low-voltage battery architecture, if the state of charge (SOC) of the two low-voltage batteries differs when they are connected through a circuit in the power supply system, the battery with the higher SOC will charge the battery with the lower SOC. Frequent mutual charging between the low-voltage batteries will shorten their lifespan.

[0015] In this application, assuming no collision occurs at the terminal and no short-circuit faults occur in either of the two power supply lines of the power supply system, dual power supply can be achieved using the energy provided by the first low-voltage battery by controlling the isolating switch and the second switch to be in the conducting state. Furthermore, by controlling the operating state of the second switch according to the state of charge of the first low-voltage battery, the connection between the second low-voltage battery and the power supply bus can be flexibly controlled. This not only meets the power demand of the load but also helps reduce the frequency of mutual charging between the two low-voltage batteries, thereby ensuring the service life of the low-voltage batteries.

[0016] In some implementations, controlling the operating state of the second switch based on the state of charge of the first low-voltage battery may include: controlling the second switch to be in an open state when the state of charge of the first low-voltage battery is greater than a first threshold and the state of charge of the second low-voltage battery is greater than or equal to the recharge threshold of the second low-voltage battery.

[0017] In this application, when no collision occurs at the terminal and no short circuit fault occurs in either of the two power supply lines of the power supply system, and when the SOC of the first low-voltage battery is at a high level and the second low-voltage battery does not require recharging, the isolating switch and the second switch are controlled to be in the conducting state, and the second switch is controlled to be disconnected. This not only utilizes the power of the first low-voltage battery to achieve dual power supply, but also avoids mutual charging between the two low-voltage batteries, thereby ensuring the service life of the low-voltage batteries.

[0018] In some implementations, controlling the operating state of the second switch based on the state of charge of the first low-voltage battery may include: controlling the second switch to be in the on state when the state of charge of the first low-voltage battery is less than or equal to a first threshold.

[0019] In this application, when no collision occurs at the terminal and no short circuit fault occurs in either of the two power supply lines of the power supply system, when the SOC of the first low-voltage battery is less than or equal to the first threshold, the control isolating switch, the first switch, and the second switch are all in the conducting state. At this time, the power energy of the two low-voltage batteries can be used to realize the two power supply lines, which can avoid the problem that the load power demand cannot be met due to the low SOC of the first low-voltage battery, thereby ensuring the normal power supply of the power supply system to the load.

[0020] In some implementations, the first threshold can be greater than the charging threshold of the first low-voltage battery.

[0021] In some implementations, the first information may include collision detection information. Controlling the operating states of the first switch, the second switch, and the disconnect switch based on the first information may include: when a collision is detected at the terminal, controlling the first switch, the second switch, and the disconnect switch to be in a conducting state, and controlling the DC / DC converter to be in a disconnected state.

[0022] Because collision accidents are often sporadic, the DC / DC converter may be operating at high voltage before the collision, and the first and / or second low-voltage batteries may not be connected to the power supply bus. In the event of a collision, improper control of the DC / DC converter, the first switch, the second switch, and the disconnector may lead to problems such as high-voltage electric shock, fire, or loss of power supply to at least one circuit of the power supply system.

[0023] In this application, when a collision is detected at the terminal, the risk of high-voltage electric shock and fire can be reduced by controlling the DC / DC converter to disconnect; by controlling the first switch, the second switch, and the isolating switch to conduct, the low-voltage battery can be connected to the power supply bus. At this time, although the DC / DC converter is in a low-voltage state, the power supply system can still use the low-voltage battery to ensure the power supply of both power sources.

[0024] Moreover, by turning on the first switch, the second switch, and the isolating switch, both low-voltage batteries can supply power to the load together. Compared with the solution of using a single low-voltage battery for power supply, this can effectively extend the working time of the load and is beneficial for the rescue of people inside the vehicle in a collision scenario.

[0025] In some implementations, collision detection information can indicate that a collision has occurred at the terminal, and fault detection information can indicate that a short circuit fault has occurred in the first power supply and / or the second power supply. Furthermore, the collision detection information is acquired earlier than the fault detection information. Controlling the operating states of the first switch, the second switch, and the disconnecting switch based on the first information can include: controlling the first switch, the second switch, and the disconnecting switch to be in a conducting state, and controlling the DC / DC converter to be in a disconnected state, based on the collision detection information; then, controlling the disconnecting switch to be in a disconnected state, and controlling the first switch and the second switch to be in a conducting state for a first time period, based on the fault detection information.

[0026] In some scenarios, a collision with a terminal may cause a short circuit in the power supply system; moreover, since the short circuit is caused by a collision with the terminal, the occurrence of the short circuit will be later than the moment the terminal is collided.

[0027] In this application, in a collision scenario, upon receiving collision detection information indicating a collision has occurred at the terminal, the first switch, the second switch, and the isolating switch can be turned on accordingly, while the DC / DC converter can be turned off to reduce the risk of high-voltage electric shock and fire, and to ensure the power supply of both power sources. Subsequently, upon receiving fault detection information indicating a short circuit fault in at least one power source, the isolating switch can be turned off accordingly, and the first and second switches can be turned on simultaneously for a period of time to prevent the short-circuit fault in at least one power source from affecting the normal power supply of the other power sources.

[0028] In some implementations, the second switch can be a normally closed switch.

[0029] In a second aspect, a control device is provided. This control device may include units or modules for performing the first aspect described above and any possible implementation thereof.

[0030] For example, the control device may include an acquisition unit and a processing unit. The acquisition unit may be used to acquire first information; the processing unit may be used to control the operating states of the first switch, the second switch, and the disconnecting switch based on the first information.

[0031] For example, in some implementations, the processing unit can be used to: control the isolating switch to be in the open state when a short circuit fault occurs in the first power supply and / or the second power supply, and control the first switch and the second switch to be in the on state during a first time period.

[0032] For example, in some implementations, the processing unit can also be used to: after the first time period, control the execution of short-circuit protection on at least one of the first and second power supplies that has a short-circuit fault.

[0033] For example, in some implementations, the processing unit can be used to: control the isolating switch and the first switch to be in the conducting state when no collision occurs at the terminal and no short circuit fault occurs in the first power supply and the second power supply, and control the working state of the second switch according to the state of charge of the first low-voltage battery.

[0034] For example, in some implementations, the processing unit can be used to: control the first switch, the second switch, and the isolating switch to be in the conducting state when a collision is detected at the terminal, and control the DC / DC converter to be in the disconnected state.

[0035] Thirdly, a control device is provided. The device includes at least one processor coupled to at least one memory for storing computer programs or instructions. The at least one processor is configured to retrieve and execute the computer program or instructions from the at least one memory, causing the device to perform the methods of the first aspect and any possible implementation thereof.

[0036] Fourthly, a computer program product is provided, comprising: computer program code, which, when executed on a computer, causes the computer to perform the methods described in the first aspect and any possible implementation thereof.

[0037] Fifthly, a computer-readable storage medium is provided, which stores a computer program that, when run on a computer, causes the computer to perform the methods described in the first aspect and any possible implementation thereof.

[0038] In a sixth aspect, a chip is provided, the chip including circuitry for performing the methods described in the first aspect and any possible implementation thereof.

[0039] In a seventh aspect, a terminal is provided, which may include the control device described in the second or third aspect and any possible implementation thereof. For example, the terminal may include a vehicle (such as a car, a ship, etc.), a drone, a robot, etc. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a power supply system provided in an embodiment of this application; Figure 2 This is another schematic diagram of the power supply system provided in the embodiments of this application; Figure 3 This is another schematic diagram of the power supply system provided in the embodiments of this application; Figure 4 This is another schematic diagram of the power supply system provided in the embodiments of this application; Figure 5This is another schematic diagram of the power supply system provided in the embodiments of this application; Figure 6 This is a schematic flowchart of a control method provided in an embodiment of this application; Figure 7 This is a schematic diagram of a working scenario of the power supply system provided in an embodiment of this application; Figure 8 This is a schematic diagram of another working scenario of the power supply system provided in the embodiments of this application; Figure 9 This is a schematic diagram of another working scenario of the power supply system provided in the embodiments of this application; Figure 10 This is a schematic diagram of another working scenario of the power supply system provided in the embodiments of this application; Figure 11 This is a schematic diagram of a control device provided in an embodiment of this application; Figure 12 This is a schematic diagram of another control device provided in the embodiments of this application; Figure 13 This is a functional block diagram of a vehicle provided in an embodiment of this application. Detailed Implementation

[0041] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0042] With the continuous development of vehicle technology, onboard electrical systems and equipment, such as autonomous driving and drive-by-wire chassis systems, are placing increasingly higher demands on onboard power supply systems. For example, in low-temperature environments, the current output capability of low-voltage batteries decreases significantly, making it difficult for power supply systems using a single low-voltage battery architecture to meet the power demands under low-temperature conditions. Therefore, some power supply systems have adopted a dual low-voltage battery architecture to improve the adaptability of the power supply system to various operating conditions.

[0043] However, for power supply systems with a dual low-voltage battery architecture, improper power supply strategy settings may affect the lifespan of the low-voltage batteries. For example, in real-world scenarios, the State of Charge (SOC) of the two low-voltage batteries often differs; if they are directly connected for extended periods, mutual charging between the batteries is likely to occur, which will accelerate battery wear and tear, thereby shortening the lifespan of the low-voltage batteries.

[0044] In view of this, the present application provides a control method and apparatus that enables the power supply system to effectively cope with power demand under normal and fault scenarios (such as collisions and short circuits), and can also effectively improve the service life of low-voltage batteries in the power supply system.

[0045] The power supply system provided in the embodiments of this application will be described first by way of example. This power supply system can be applied to various terminals, such as vehicles, ships, drones, robots, etc.

[0046] The power supply system may include a high-voltage battery, a first low-voltage battery, a second low-voltage battery, a first power supply bus, a second power supply bus, a first switch, a second switch, a DC / DC converter, and a first circuit for connecting the first power supply bus and the second power supply bus.

[0047] The first low-voltage battery can be connected to the first power supply bus via a first switch, which can be used to control the connection between the first low-voltage battery and the first power supply bus. Similarly, the second low-voltage battery can be connected to the second power supply bus via a second switch, which can be used to control the connection between the second low-voltage battery and the second power supply bus.

[0048] The high-voltage battery can be connected to at least one of the first and second power supply buses via a DC / DC converter; the DC / DC converter can control the connection and disconnection between the high-voltage battery and the power supply bus. In the on state, the DC / DC converter connects the high-voltage battery to the power supply bus; this operating state is also known as DC / DC high voltage connection. In the off state, it disconnects the high-voltage battery from the power supply bus; this operating state is also known as DC / DC low voltage connection.

[0049] The first circuit may include an isolating switch, which can be used to control the connection and disconnection between the first power supply bus and the second power supply bus.

[0050] The following is combined with Figure 1 Taking the power supply system as an example of an on-board power supply system, the components of the power supply system, such as the first low-voltage battery, the second low-voltage battery, the first switch, the second switch, and the disconnecting switch, are described in an exemplary manner.

[0051] For example, Figure 1 This is a schematic diagram of a power supply system provided in an embodiment of this application.

[0052] Reference Figure 1 In (a), the power source in the power supply system 10 may include a high-voltage battery 311, a low-voltage battery 321, and a low-voltage battery 322. For example, the output voltage of the high-voltage battery 311 may be 400 volts (V) or 800V, and it may be a power battery for the vehicle. As another example, the output voltage of the low-voltage batteries 321 and 322 may be 12V, and they may be low-voltage storage batteries for the vehicle.

[0053] It should be noted that in actual implementation, low-voltage batteries 321 and 322 can be the same type of battery or different types of batteries, and this application embodiment does not limit this. For example, both low-voltage batteries can be lithium batteries or both can be lead-acid batteries. As another example, one of the two low-voltage batteries can be a lithium battery and the other can be a lead-acid battery.

[0054] Furthermore, in this embodiment, "high voltage" and "low voltage" can be distinguished according to a certain voltage threshold. For example, this voltage threshold can be 60V; correspondingly, batteries with an output voltage above 60V are high-voltage batteries, and batteries with an output voltage less than or equal to 60V are low-voltage batteries. In this case, even if the output voltage of batteries 321 and 322 is around 48V, they are still low-voltage batteries.

[0055] Reference Figure 1 In (a), in addition to the power supply, the power supply system 10 may also include a power supply bus for mounting loads, such as power supply buses 301 and 302; the power supply in the power supply system 10 may be connected to the power supply bus in the system.

[0056] Specifically, for the high-voltage battery 311, it can be connected to the power supply bus via a DC / DC converter. For example, as... Figure 1 As shown in (a), the high-voltage battery 311 can be connected to the power supply bus 301 via DC / DC1 and to the power supply bus 302 via DC / DC2. Taking DC / DC1 as an example, when DC / DC1 is in the off state, the high-voltage battery 311 will be disconnected from the power supply bus 301; when DC / DC1 is in the on state, the high-voltage battery 311 can be connected to the power supply bus 301 and can supply power to the load and / or the low-voltage battery through the power supply bus 301. Similarly, the on / off state between the high-voltage battery 311 and the power supply bus 302 can be controlled via DC / DC2.

[0057] For the low-voltage batteries 321 and 322, they can be connected to a power supply bus in the system respectively; and the power supply system 10 may also include a switch for controlling the connection and disconnection between the low-voltage batteries and the power supply bus.

[0058] For example, such as Figure 1As shown in (a), the low-voltage battery 321 can be connected to the power supply bus 301 via switch 323. When switch 323 is in the open state, the low-voltage battery 321 and the power supply bus 301 are disconnected; at this time, no power transfer can occur between the low-voltage battery 321 and the power supply bus 301. When switch 323 is in the closed state, the low-voltage battery 321 and the power supply bus 301 are connected; at this time, power transfer can occur between the low-voltage battery 321 and the power supply bus 301. For the low-voltage battery 321, in the power supply operation, switch 323 can be turned on, and power can flow from the low-voltage battery to the power supply bus 301, thereby powering the load. In the charging operation, by turning on switch 323, power can flow from the power supply bus 301 to the low-voltage battery, thereby charging the low-voltage battery.

[0059] Similarly, the low-voltage battery 322 can be connected to the power supply bus 302 via switch 324; the switch 324 can control the on / off state between the low-voltage battery 322 and the power supply bus 302. For example, switches 323 and 324 can be implemented using devices such as metal-oxide-semiconductor field-effect transistors (MOSFETs).

[0060] For switches (such as switch 323 and switch 324) used to control the connection between a low-voltage battery and the power supply bus, in one design approach, the switch and the corresponding low-voltage battery can be separate components; for example, the low-voltage battery 321 can be integrated into a battery pack, while the switch 323 can be located outside the battery pack. In another design approach, the switch and the corresponding low-voltage battery can be integrated into the same component; for example, such as... Figure 1 As shown, the low-voltage battery 321 and switch 323 can be integrated into the battery pack 325, and similarly, the low-voltage battery 322 and switch 324 can be integrated into the battery pack 326.

[0061] Furthermore, in the power supply system 10, power supply buses 301 and 302 can be connected via circuit 330. This circuit 330 may include an isolating switch to control the connection and disconnection between the two power supply buses. For example, circuit 330 may be equipped with an isolating switch 331, such as... Figure 1 As shown in (a) of the diagram. When the disconnecting switch 331 is in the ON state, power supply buses 301 and 302 can be connected through circuit 330; at this time, power can be transferred between the two power supply buses through circuit 330. When the disconnecting switch 331 is in the OFF state, power supply buses 301 and 302 will be disconnected; at this time, the two power supplies provided by the power supply system 10 through the two power supply buses will be independent of each other.

[0062] In the power supply system 10, for each power supply bus (such as power supply bus 301, 302) used to mount loads, one or more loads can be mounted on each power supply bus; the power supply system can supply power to these loads through the power supply bus.

[0063] For example, loads can be divided into safety loads and regular loads based on whether they have redundant power supply requirements. Loads without redundant power supply requirements can be considered regular loads, while loads with redundant power supply requirements can be considered safety loads.

[0064] For example, in a vehicle, loads such as seat heaters, center console screens, and audio systems, which require only one power supply, are considered conventional loads because they do not need redundant power. Loads such as brake-by-wire systems, steering-by-wire systems, high-voltage battery management systems, and electric power steering systems, which require two power supplies, are considered safety loads because they have redundant power requirements.

[0065] For example, based on the classification standards of the Society of Automotive Engineers (SAE), the functional safety levels of various loads in a vehicle can be divided into several levels: Quality Management (QM), ASIL A, ASIL B, ASIL C, and ASIL D. If a load's functional safety level is QM or ASIL A, then only one power supply is needed to meet its functional safety requirements; correspondingly, this load is considered a conventional load. If a load's functional safety level is ASIL D, then it means that two independent power supplies are needed to meet its functional safety requirements; correspondingly, this load is considered a safe load.

[0066] Furthermore, since safety loads and regular loads have different power supply requirements, they can be connected to the power supply bus in different ways. Specifically, a single safety load can be connected to two power supply buses simultaneously; a single regular load can be connected to one power supply bus.

[0067] For example, the power supply bus of power supply system 10 can be connected to safe loads 341 to 34m, conventional loads 351 to 35p, and conventional loads 361 to 36q, such as Figure 1 As shown in (b) in the figure; m, p and q are all integers greater than or equal to 0.

[0068] For the safety loads 341 to 34m, they can be simultaneously connected to power supply buses 301 and 302. In this way, power supply system 10 can provide one power supply to them through power supply bus 301 and another power supply through power supply bus 302, thereby meeting the dual power supply requirements of these safety loads. For the conventional loads 351 to 35p, they can be connected to power supply bus 301, and power supply system 10 can supply power to these loads through power supply bus 301. For the conventional loads 361 to 36q, they can be connected to power supply bus 302, and power supply system 10 can supply power to these loads through power supply bus 302.

[0069] It should be noted that the electrical energy supplied by the power supply system 10 to the load can come from one or more of the high-voltage battery 311, low-voltage battery 321 and low-voltage battery 322.

[0070] The above combination Figure 1 The components in the power supply system 10 are described by way of example. In this power supply system, low-voltage battery 321 can correspond to a first low-voltage battery and low-voltage battery 322 can correspond to a second low-voltage battery. Accordingly, switch 323 can correspond to a first switch and switch 324 can correspond to a second switch. Power supply bus 301 can correspond to a first power supply bus and power supply bus 302 can correspond to a second power supply bus. Circuit 330 can correspond to a first circuit.

[0071] It should be noted that, Figure 1 The power supply system shown is for illustrative purposes only; in actual implementations, compared to... Figure 1 The power supply system can have more or fewer components.

[0072] For example, refer to Figure 2 Compared to power supply system 10, in power supply system 20, circuit 330 may include two disconnect switches, namely disconnect switches 331 and 332.

[0073] Furthermore, to reduce wiring harness length, in power supply system 20, disconnector 331 and DC / DC1 can be integrated into the same component (i.e., distribution box 333), and disconnector 332 and DC / DC2 can be integrated into the same component (i.e., distribution box 334). For example... Figure 2As shown, the power distribution box 333 may include three interfaces: interface A can be connected to the high-voltage battery 311, interface B can be connected to the power supply bus 301, and interface C can be connected to the power distribution box 334. Similarly, the power distribution box 334 may also include three interfaces: interface D can be connected to the high-voltage battery 311, interface E can be connected to the power supply bus 302, and interface F can be connected to the power distribution box 333. In this case, the circuit 330 will consist of part of the internal circuitry of the power distribution box 333, the circuitry between the power distribution boxes 333 and 334, and part of the internal circuitry of the power distribution box 334.

[0074] For example, refer to Figure 3 The power supply system 30 has only one DC / DC converter. More specifically, similar to the power supply system 10, the high-voltage battery 311 is still connected to the power supply bus 301 via DC / DC1; however, unlike the power supply system 10, the high-voltage battery 311 is no longer connected to the power supply bus 302.

[0075] Furthermore, similar to power supply system 20, in power supply system 30, the disconnect switch 331 and DC / DC1 can be integrated into the distribution box 333. In power supply system 30, interface A of the distribution box 333 can be connected to the high-voltage battery 311, interface B can be connected to the power supply bus 301, and interface C can be connected to the power supply bus 302. In this case, circuit 330 will be composed of the internal circuitry of the distribution box 333.

[0076] For example, in some embodiments, when a load is connected to the power supply bus of a power supply system, a switch can be installed between the load and the power supply bus to control the connection and disconnection between the load and the power supply bus. For example, see... Figure 4 Assume that the power supply bus of power supply system 20 is connected to safety load #1, safety load #2, normal load #1, and normal load #2. Figure 4 As shown, safety load #1 can be connected to both power supply buses 301 and 302 simultaneously. A switch 371 can be installed between it and power supply bus 301, and a switch 372 can be installed between it and power supply bus 302. Similarly, safety load #2 can be connected to both power supply buses 301 and 302 simultaneously, and its connection to these two power supply buses can be controlled by switches 373 and 374 respectively. Normal load #1 can be connected to power supply bus 301 via switch 375, and its connection can be controlled by switch 375; normal load #2 can be connected to power supply bus 302, and its connection can be controlled by switch 376.

[0077] It should be noted that, Figures 1 to 4 Only the electrical connections of the components in the power supply system are shown; related communication connections are not shown. The following uses... Figure 2 Taking the power supply system shown as an example, combined with Figure 5 An example is provided to illustrate the relevant communication connections of the power supply system.

[0078] For example, refer to Figure 5 The controller 305 serves as the control device for the power supply system 20 and can be used to control the operating state of the power supply system. In one design, the controller can be located within the power supply system 20; in another design, the controller can be located within the power supply system 20, for example, if the power supply system 20 is an on-board power supply system, the controller 305 can be a vehicle control unit (VCU) or a domain controller in the vehicle.

[0079] Taking power supply system 20 as an example of vehicle-mounted power supply system, such as Figure 5 As shown, controller 305 can communicate with the airbag module (e.g., via a hardwired connection); by receiving signals output by the airbag module, it can determine whether a collision has occurred. The controller can also communicate with battery packs 325 and 326, power distribution box 333 and 334, for example, via a controller area network (CAN) bus. Battery pack 325 can report the current SOC of low-voltage battery 321 to controller 305; power distribution box 333 can report whether DC / DC1 is currently in a high-voltage state; similarly, battery pack 326 can report the current SOC of low-voltage battery 322 to controller 305; and power distribution box 334 can report the current state of DC / DC2 to controller 305. Controller 305 can send control information to battery pack 325 to control the on / off state of switch 323; similarly, controller 305 can send control information to battery pack 326 to control the on / off state of switch 324. The controller 305 can send control information to the distribution box 333 to control the operating state of DC / DC1 and / or disconnector 331; similarly, it can send control information to the distribution box 334 to control the operating state of DC / DC2 and / or disconnector 332.

[0080] It should be pointed out that, Figure 5The communication connections shown are merely examples. For instance, a vehicle may be equipped with a vehicle collision sensor; the controller 305 can communicate with this sensor and determine whether a collision has occurred based on the data collected by the sensor. As another example, the controller 305 can communicate with an onboard camera sensor and determine whether a collision has occurred based on the image data collected by the camera sensor. As yet another example, the vehicle may include a controller A, which can be used to determine whether a collision has occurred based on data from relevant sensors; the controller 305 can be connected to the controller A and can learn whether a collision has occurred based on the indication information sent by the controller A. As yet another example, when the switch 323 and the low-voltage battery 321 are two different components, the controller 305 can communicate with both components. As yet another example, when the power supply system 20 is applied to other types of terminals (such as drones or robots), the controller 305 can communicate with the corresponding sensors (such as collision sensors, cameras, etc.) in that terminal to learn whether the terminal has experienced a collision.

[0081] The above combination Figures 1 to 5 The power supply system provided in the embodiments of this application has been described by way of example. The following, in conjunction with... Figures 6 to 10 The control method provided in the embodiments of this application will be described by way of example.

[0082] For example, Figure 6 This is a schematic flowchart of a control method provided in an embodiment of this application. The method can be executed by a power supply system, or by a control device of the power supply system (such as the controller 305 described above), or by a component of the control device (such as a chip, processor, processing circuit, etc.), or by a terminal containing the control device or power supply system. The method 200 may include the following steps: S210, Obtain first information.

[0083] The first piece of information may include collision detection information and / or power supply system operating status information.

[0084] Collision detection information can be used to indicate whether a collision has occurred at the terminal. For example, taking a vehicle as an example, it can be determined whether a collision has occurred based on one or more of the following: airbag trigger signal, seatbelt trigger signal, data collected by the vehicle collision sensor, and data collected by the vehicle's camera / radar and other perception sensors. The following embodiments use a vehicle-type terminal as an example to illustrate the control method provided in this application; in actual implementation, the embodiments of this application can also be applied to other types of terminals.

[0085] In one example, with Figure 5For example, in the case of an architecture where no collision occurs, the airbag module can send heartbeat signals at a preset frequency. Based on these heartbeat signals, the controller 305 can determine that the airbags have not been deployed, and therefore assume that no collision has occurred. When a collision occurs, the airbag module can send an airbag deployment signal to activate the airbags and indicate that a collision has taken place. Upon receiving this deployment signal, the controller 305 can determine that the airbags have been deployed, i.e., a collision has occurred.

[0086] In another example, since airbags may not trigger in certain collision scenarios, one or more of the following can be combined: seatbelt trigger signal, data collected by vehicle collision sensors, and data collected by camera sensors, to determine whether a collision has occurred, thereby improving the accuracy of collision detection.

[0087] For example, the operating status information of the power supply system may include: the state of charge (SOC) of the first low-voltage battery, the state of charge of the second low-voltage battery, and fault detection information of the power supply system.

[0088] For example, a power supply system can provide a first power supply via a first power supply bus and a second power supply via a second power supply bus; the fault detection information of the power supply system can indicate whether a short circuit, open circuit, or other fault has occurred in either of these two power supply lines. Furthermore, it can also indicate the location of the fault in the power supply system.

[0089] S220, based on the first information, controls the operating status of the first switch, the second switch, and the disconnecting switch.

[0090] For example, if no collision occurs at the terminal and no short circuit fault occurs in the first power supply and the second power supply, when the state of charge of the first low-voltage battery is less than or equal to its charging threshold, and / or when the state of charge of the second low-voltage battery is less than or equal to its charging threshold, the first switch, the second switch and the disconnect switch are controlled to be in the conducting state, and the DC / DC converter is controlled to be in the conducting state.

[0091] The charging threshold can be a State of Charge (SOC) threshold used to trigger charging of the low-voltage battery. For example, a charging threshold of 50% for low-voltage battery 321 means that charging is required when the SOC of this battery drops to 50%. Similarly, a charging threshold of 40% for low-voltage battery 321 means that charging is required when the SOC of this battery drops to 40%. Furthermore, the charging thresholds for low-voltage batteries 321 and 322 can be the same (e.g., both 50%), or they can be different. In practical implementation, the charging thresholds for each low-voltage battery can be flexibly set according to requirements.

[0092] by Figure 4 Taking the system architecture shown as an example, assume that the charging thresholds for both low-voltage batteries 321 and 322 are 50%. When the SOC of low-voltage battery 321 drops to 50%, it can be determined that low-voltage battery 321 needs to be charged. Accordingly, at least one DC / DC converter can be controlled to apply high voltage, and switches 323, 324, and disconnect switches 331 and 332 can be controlled to be in the conducting state. At this time, high-voltage battery 311 can output power to the power supply bus through the DC / DC converter, and the power can flow to low-voltage battery 321 through power supply bus 301, thereby realizing the charging of low-voltage battery.

[0093] In some implementations, the first information may include collision detection information and power supply system operating status information. Controlling the operating status of the first switch, second switch, and disconnector switch based on the first information may include: controlling the disconnector switch and first switch to be in a conducting state when no collision occurs at the terminal and no short-circuit fault occurs in either the first or second power supply path, and controlling the operating status of the second switch according to the state of charge of the first low-voltage battery.

[0094] by Figure 4 Taking the illustrated architecture as an example, if no collision occurs at the terminal and neither of the two power supplies in the power supply system 20 experiences a short circuit fault, switches 323, 331, and 332 can be turned on. At this time, since power supply buses 301 and 302 are connected through circuit 330, even if the low-voltage battery 322 is disconnected from the power supply bus 302, the power supply system can still provide power to both circuits through the low-voltage battery 321. Furthermore, the on / off state of switch 324 can be controlled according to the SOC of the low-voltage battery 321. For example, when the low-voltage battery 321 has sufficient remaining power, switch 324 can be turned off, eliminating the need for the low-voltage battery 322 to supply power to the load. When the low-voltage battery 321 has low remaining power, switch 324 can be turned on again, connecting both low-voltage batteries 321 and 322 to the power supply circuit.

[0095] In the power supply system provided in this application embodiment, if there is a difference in the SOC of the two low-voltage batteries when the two low-voltage batteries are connected through the circuit in the power supply system, the battery with the higher SOC will charge the battery with the lower SOC. Frequent mutual charging between the two low-voltage batteries will shorten their service life.

[0096] In this embodiment, assuming no collision occurs at the terminal and no short-circuit faults occur in either of the two power supply paths of the power supply system, dual power supply can be achieved by controlling the isolating switch and the second switch to be in the conducting state, utilizing the power provided by the first low-voltage battery. Furthermore, by controlling the on / off state of the second switch according to the SOC of the first low-voltage battery, the connection between the second low-voltage battery and the power supply bus can be flexibly controlled. This satisfies the power demand of the load while reducing the frequency of mutual charging between the two low-voltage batteries, thereby ensuring the service life of the low-voltage batteries.

[0097] In some implementations, controlling the operating state of the second switch based on the state of charge (SOC) of the first low-voltage battery can include: controlling the second switch to be in an open state when the SOC of the first low-voltage battery is greater than a first threshold and the SOC of the second low-voltage battery is greater than or equal to a recharging threshold of the second low-voltage battery. For example, the first threshold can be 55%, 60%, or 65%; when the SOC of the first low-voltage battery is greater than or equal to the first threshold, its SOC can be considered to be at a high level; when the SOC of the first low-voltage battery is less than or equal to the first threshold, its SOC can be considered to be at a low level.

[0098] For example, with Figure 4 Taking the system architecture shown as an example, assuming the first threshold is 60%. If no collision occurs at the terminal and neither power supply line experiences a short circuit, when the SOC of low-voltage battery 321 is greater than 60% and the SOC of low-voltage battery 322 is greater than its charging threshold, in addition to controlling switch 323, isolating switch 331, and isolating switch 332 to be on, switch 324 can also be controlled to be off. At this time, only low-voltage battery 321 supplies power to the load. Low-voltage battery 321 can provide one power supply via power supply bus 301, and another power supply via the path of power supply bus 301-circuit 330-power supply bus 302.

[0099] When switch 324 is off, power cannot be transferred between low-voltage battery 322 and power supply bus 302. At this time, even if low-voltage batteries 321 and 322 have different SOCs, the low-voltage battery with higher SOC cannot charge the low-voltage battery with lower SOC. Thus, the frequent mutual charging phenomenon caused by the two low-voltage batteries due to the imbalance of power can be avoided.

[0100] In this embodiment, when the terminal does not collide and neither of the two power supply lines of the power supply system experiences a short circuit, and when the SOC of the first low-voltage battery is greater than the first threshold and the second low-voltage battery does not require recharging, the isolating switch and the second switch are controlled to be in the conducting state, and the second switch is controlled to be disconnected. This allows the power of the first low-voltage battery to be used to achieve two power supplies, and also avoids mutual charging between the two low-voltage batteries, thereby ensuring the service life of the low-voltage batteries.

[0101] In some implementations, controlling the operating state of the second switch based on the state of charge of the first low-voltage battery may include: controlling the second switch to be in the on state when the state of charge of the first low-voltage battery is less than or equal to a first threshold.

[0102] For example, still in Figure 4 Taking the system architecture shown as an example, we still assume the first threshold is 60%. If no collision occurs at the terminal and neither power supply line experiences a short circuit, when the SOC of low-voltage battery 321 drops to 60%, in addition to turning on control switches 323, 331, and 332, control switch 324 can also be turned on. At this time, power can be transferred between low-voltage battery 321 and power supply bus 301, and between low-voltage battery 322 and power supply bus 302. The power supply system can then utilize the power from both low-voltage batteries to supply power to the load.

[0103] In this embodiment, when the terminal does not collide and neither of the two power supplies of the power supply system experiences a short circuit fault, when the SOC of the first low-voltage battery is less than or equal to the first threshold, the control isolating switch, the first switch, and the second switch are all in the conducting state. This allows the power energy of the two batteries to be used to supply power to the load, avoiding the problem that the load's power demand cannot be met due to the low SOC of the first low-voltage battery, and ensuring the normal power supply of the power supply system to the load.

[0104] In some implementations, the first threshold can be greater than the charging threshold of the first low-voltage battery. For example, assuming the charging threshold of the first low-voltage battery is 50%, the first threshold can be any value greater than 50%, such as 52%, 55%, 58%, 60%, etc.

[0105] The following is based on Figure 4 The architecture shown is designed for scenarios where no collision occurs at the terminal and there are no short-circuit faults in either power supply. Figure 7 The on / off states of each switch during load power consumption are illustrated by example. It is assumed that the charging threshold of low-voltage batteries 321 and 322 is 50%, and the first threshold is 60%; moreover, it is assumed that the SOC of these two low-voltage batteries is greater than 60% in the initial state.

[0106] Reference Figure 7 In the initial state, the terminal does not collide and the two power supplies of the power supply system do not have a short circuit fault. Since the low-voltage battery 321 has a high SOC and the low-voltage battery 322 does not need to be recharged, the switch 323, isolating switch 331 and 332 can be turned on and the switch 324 can be turned off. At this time, only the low-voltage battery 321 supplies power to the load.

[0107] As the load consumes power, the state of charge (SOC) of the low-voltage battery 321 will gradually decrease. After the SOC of the low-voltage battery 321 drops to 60%, if the control switch 324 remains in the open state, the SOC of the low-voltage battery will rapidly drop to 50%, triggering a recharge of the low-voltage battery. This will cause the high-voltage battery to frequently recharge the low-voltage battery.

[0108] In view of this, such as Figure 7 As shown, when the SOC of low-voltage battery 321 drops to 60%, switch 324 can be turned on, and switches 323, 331, and 332 can be kept in their original states; at this time, both low-voltage batteries supply power to the load. As the power is further consumed, when the SOC of low-voltage battery 321 drops to 50%, the low-voltage battery can be recharged.

[0109] In this embodiment, by promptly connecting the low-voltage battery 322 to the power supply circuit, the time it takes for the SOC of the low-voltage battery 321 to drop from the first threshold to the charging threshold can be extended, especially when the SOC of the low-voltage battery 322 is high. This extends the time the terminal can remain stationary during power-off scenarios and reduces the frequency of charging the low-voltage battery from the high-voltage battery.

[0110] It should be noted that when switches 323, 324, and disconnecting switches 331 and 332 are all on, if the State of Charge (SOC) of low-voltage batteries 321 and 322 are not equal, the battery with the higher SOC may charge the battery with the lower SOC. Therefore, even if the SOCs of these two low-voltage batteries have a large difference before switch 324 is on, after switches 323, 324, and disconnecting switches 331 and 332 are all on, their SOCs will gradually converge as the power is consumed. In this case, the SOCs of these two low-voltage batteries may drop to 50% simultaneously, which can trigger simultaneous recharging of both batteries.

[0111] In some implementations, the first information may include the operating status information of the power supply system. Controlling the operating status of the first switch, the second switch, and the disconnecting switch based on the first information may include: when a short-circuit fault occurs in the first power supply and / or the second power supply, controlling the disconnecting switch to be in the open state, and controlling the first and second switches to be in the on state for a first time period. For example, the first time period may be 0.1 seconds or 0.2 seconds.

[0112] The following is based on Figure 4 The architecture shown addresses the scenario where a short circuit occurs in the power supply bus 301. Figure 8 The on / off states of each switch before and after a short-circuit fault are illustrated by example. It is still assumed that the charging threshold of low-voltage batteries 321 and 322 is 50%, the first threshold is 60%, and the SOC of both low-voltage batteries is greater than 60% in the initial state.

[0113] like Figure 8 As shown, in the initial state, since the SOC of low-voltage battery 321 is at a high level and low-voltage battery 322 does not need to be recharged, and no collision of the terminal or short circuit fault of the two power supplies is detected, correspondingly, switch 323, isolating switch 331 and 332 can be turned on, and switch 324 can be turned off; at this time, only low-voltage battery 321 can supply power to the load.

[0114] When a short circuit fault is detected in the power supply bus 301, the isolating switches 331 and 332 can be disconnected to prevent the short circuit fault in this power supply from affecting the other power supply.

[0115] At this point, if switches 323 and 324 remain in their original states, for safety loads #1 and #2, on the one hand, the power supply to the path of power supply bus 301 will be abnormal; on the other hand, the path of power supply bus 302 may have no power supply, especially if switch 324 was originally in the open state. This will cause abnormalities in the power supply to both safety loads, thereby affecting the normal operation of the safety loads.

[0116] Therefore, when a short circuit fault is detected in power supply bus 301, in addition to controlling isolating switches 331 and 332 to open, switches 323 and 324 can also be controlled to open, so that both lines can be supplied with power. Similarly, when a short circuit fault is detected in power supply bus 302, isolating switches 331 and 332 can be controlled to open, and switches 323 and 324 can also be controlled to open.

[0117] Because short-circuit faults are random and sporadic, the first switch and / or the second switch may be in an open state before a short-circuit fault occurs in the power supply system. In this embodiment, when a short-circuit fault is detected in the first power supply and / or the second power supply, the disconnection of the two power supply buses can be achieved by controlling the disconnection switch to prevent interference from the short-circuited power supply to the other power supply. Moreover, by controlling the first switch and the second switch to be simultaneously turned on during a first time period, both power supplies can be supplied with power during that time period, thus preventing the loss of power supply to one power supply due to the disconnection of the disconnection switch. In this way, the normal operation of the other power supply can be guaranteed when a short-circuit fault occurs in one power supply.

[0118] In some implementations, the method may further include: after the first time period, controlling at least one of the power supplies that has experienced a short-circuit fault to perform short-circuit protection.

[0119] For example, still refer to Figure 8 When a short circuit fault is detected in the power supply line 301, the isolating switches 331 and 332 can be disconnected, and switches 323 and 324 can be turned on simultaneously for a period of time; then, short circuit protection can be provided for the power supply line where the power supply line 301 is located.

[0120] The above Figure 4 Taking architecture as an example, combined with Figure 8 This paper provides an illustrative example of a scenario where one of the power supply lines in a power supply system experiences a short-circuit fault. It also describes a scenario where both power supply lines experience short-circuit faults, and upon detection of these faults, the following steps are taken: Figure 8 The solution is similar: first, control isolating switches 331 and 332 to conduct, and then control switches 323 and 324 to conduct simultaneously for a period of time. Then, short-circuit protection is applied to both power supplies separately.

[0121] Because short-circuit faults are random and sporadic, in real-world scenarios, a short-circuit fault in a power supply line may occur on the power source side, the load side, or within the line itself. Therefore, corresponding short-circuit protection measures can be taken according to the location of the short-circuit fault in that power supply line.

[0122] The following example illustrates the corresponding short-circuit protection measures using a short-circuit fault in the power supply bus 301 as an example.

[0123] In one example, the short-circuit fault in this power supply path is caused by a short circuit between the low-voltage battery 321 and ground. In this case, switch 323 can be disconnected to provide short-circuit protection for this power supply path. Furthermore, other power sources in the power supply system can be used to restore power to this path. In one implementation, DC / DC1 can be connected to high voltage, and the high-voltage battery 311 can be used to power this path. In another implementation, isolating switches 331 and 332 can be restored to conduction, while switch 324 remains in the conducting state, so that the low-voltage battery 322 can provide power to both paths.

[0124] In another example, the short-circuit fault in this power supply line is caused by a short circuit in conventional load #1; in this case, switch 375 can be disconnected to achieve short-circuit protection for this power supply line. Furthermore, switches 323, 324, and disconnecting switches 331 and 332 can be controlled to restore the state before the short-circuit fault occurred, thereby restoring the two power supplies to the safe load.

[0125] In another example, the short circuit fault of this power supply is caused by a short circuit between the power supply bus 301 and the ground wire; in this case, the switch 323 and DC / DC1 can be disconnected to achieve short circuit protection for this power supply.

[0126] In some implementations, the first information may include collision detection information. Controlling the operating states of the first switch, the second switch, and the disconnect switch based on the first information may include: when a collision is detected at the terminal, controlling the first switch, the second switch, and the disconnect switch to be in a conducting state, and controlling the DC / DC converter to be in a disconnected state.

[0127] The following is based on Figure 4 The architecture shown is designed for scenarios where terminal collisions occur, combined with... Figure 9 The states of each switch before and after the collision are illustrated by example. It is still assumed that the charging threshold of low-voltage batteries 321 and 322 is 50%, the first threshold is 60%, and the SOC of both low-voltage batteries is greater than 60% in the initial state.

[0128] like Figure 9 As shown, in the initial state, since the SOC of low-voltage battery 321 is at a high level and low-voltage battery 322 does not need to be recharged, and no collision of the terminal or short circuit fault of the two power supplies is detected, correspondingly, switch 323, isolating switch 331 and 332 can be turned on, and switch 324 can be turned off; at this time, only low-voltage battery 321 can supply power to the load.

[0129] When a collision is detected at the terminal, the high voltage of the DC / DC converter can be controlled to reduce the risk of electric shock and fire.

[0130] At this time, if switches 323, 324 and the disconnecting switch are all kept in their original states (i.e., switches 323, disconnecting switches 331 and 332 are kept in the conducting state, and switch 324 is kept in the open state), only the low-voltage battery 321 will supply power to the load in the power supply system, and the power supply system will not be able to utilize the electrical energy in the low-voltage battery 322.

[0131] Therefore, when a collision is detected at the terminal, in addition to controlling the high voltage of the DC / DC converter, switches 323, 324, and disconnect switches 331 and 332 can also be kept in the ON state to fully utilize the energy in the two low-voltage batteries and effectively extend the working time of the load. For example, after a collision, the vehicle can control the turn signals to operate in hazard light mode; by fully utilizing the energy in the two low-voltage batteries, the duration of the turn signals operating in hazard light mode can be effectively extended, improving the vehicle's visibility and facilitating rescue of occupants.

[0132] In some implementations, collision detection information can indicate that a collision has occurred at the terminal; fault detection information can indicate that a short circuit fault has occurred in the first power supply and / or the second power supply; and the collision detection information is acquired earlier than the fault detection information. Controlling the operating states of the first switch, the second switch, and the disconnecting switch based on the first information can include: controlling the first switch, the second switch, and the disconnecting switch to be in a conducting state, and controlling the DC / DC converter to be in a disconnected state, based on the collision detection information; then, controlling the disconnecting switch to be in a disconnected state, and controlling the first switch and the second switch to be in a conducting state for a first time period, based on the fault detection information.

[0133] For example, a collision may trigger a short circuit. For instance, connectors in in-vehicle electrical equipment are prone to deformation / damage during a collision, leading to a short circuit. Similarly, the external insulation of in-vehicle wiring harnesses may be damaged / detached during a collision; if conductors within the harness come into direct contact with the vehicle's sheet metal, this can also easily cause a short circuit.

[0134] In such scenarios, since the short-circuit fault is caused by a collision with the terminal, the occurrence of the short-circuit fault will be slightly later than the moment of the collision. The following combines... Figure 10 This section provides an illustrative description of the states of various switches in such scenarios; among them, in Figure 10 In this scenario, it is assumed that a collision with the terminal will cause a short circuit in the power supply bus 301.

[0135] Reference Figure 10 When a collision is detected at the terminal, and Figure 9The method is similar, allowing control of high voltage under DC / DC power and the conduction of switches 323 and 324, and isolating switches 331 and 332. When a short-circuit fault is subsequently detected in a particular path, it is similar to... Figure 8 Similarly, the isolating switch can be disconnected first, and switches 323 and 324 can be turned on simultaneously to ensure power supply to at least one path for the safe load; then, short-circuit protection can be activated for the power supply path where the short-circuit fault occurred.

[0136] In some embodiments, the power supply system can have multiple operating states, and by controlling the on / off state of each switch, the power supply system can be made to operate in the corresponding state.

[0137] For example, in the case of low-voltage battery power supply, the operating state of the power supply system can include one or more of the following: a first state, a second state, a third state, and a fourth state. In the first state, the first switch and the disconnecting switch can be in the ON state, and the second switch can be in the OFF state. In the second state, the first switch, the second switch, and the disconnecting switch can all be in the ON state. In the third state, the first switch, the second switch, and the third switch can all be in the ON state, and the DC / DC converter can operate at a lower voltage. In the fourth state, the disconnecting switch can be in the OFF state, and the first switch and the second switch can be in the ON state simultaneously, at least for a certain period of time.

[0138] Accordingly, by controlling components such as the first switch, the second switch, and the disconnecting switch, the power supply system can be made to operate in the corresponding states. The following uses power supply system 20 as an example, and with reference to Table 1, provides an exemplary description of the four operating states and the switching between them.

[0139] Table 1

[0140] As shown in Table 1, the power supply system can have at least 4 operating states (i.e., state 1 to state 4); among them, state 1 to state 4 can correspond one-to-one with the first state to the fourth state mentioned above.

[0141] If no collision occurs at the terminal and no short-circuit fault occurs in either power supply path of the power supply system, the power supply system can be controlled to operate in state 1 when the SOC of low-voltage battery 321 is greater than threshold 1 and the SOC of low-voltage battery 322 is greater than threshold 2. In state 1, all disconnect switches in circuit 330 can be in the ON state, switch 323 can be in the ON state, and switch 324 can be in the OFF state. At this time, low-voltage battery 321 can supply power to the load, while low-voltage battery 322 does not supply power to the load. Threshold 1 can correspond to the aforementioned first threshold, and threshold 2 can be greater than or equal to the charging threshold of low-voltage battery 322.

[0142] If no collision occurs at the terminal and no short-circuit fault occurs in either of the two power supply lines of the power supply system, the power supply system can be controlled to operate in state 2 when the SOC of low-voltage battery 321 is less than or equal to threshold 1. In state 2, all disconnect switches in circuit 330 can be in the conducting state, and switches 323 and 324 can also be in the conducting state. At this time, low-voltage batteries 321 and 322 can jointly supply power to the load.

[0143] When a collision occurs at the terminal, regardless of the power supply system's state before the collision, the power supply system can be controlled to enter state 3. In state 3, the DC / DC converter can apply high voltage, and switches 323, 324, and the disconnect switch can all be in the ON state. At this time, low-voltage batteries 321 and 322 can jointly supply power to the load.

[0144] When a short-circuit fault occurs in one of the power supply lines, the power supply system can be controlled to enter state 4, regardless of its state before the fault occurred. In state 4, the isolating switch is open to isolate the two power supply lines. Furthermore, switches 323 and 324 can both be turned on, allowing the two low-voltage batteries to supply power to their respective circuits.

[0145] In one example, assuming both threshold 1 and threshold 2 are 60%, and the recharge threshold for low-voltage battery 321 is 50%, in a scenario where no collision occurs at the terminal and neither power supply line experiences a short circuit, if the initial state of both low-voltage batteries is greater than 60%, the power supply system can be controlled to operate in state 1. As the load consumes power, the state of low-voltage battery 321 will gradually decrease; when the state of low-voltage battery 321 drops to 60%, the power supply system can be controlled to enter state 2. As the load further consumes power, the state of low-voltage battery 321 will further decrease. When the state of low-voltage battery 321 drops to 50%, recharging of the low-voltage battery can be triggered. During this process, the changes in the on / off states of each switch can be described as follows: Figure 7 As shown.

[0146] In this example, under normal operating conditions, the power supply system can preferentially use low-voltage battery 321 to power the load, and only activate low-voltage battery 322 after its SOC drops to threshold 1. Accordingly, low-voltage battery 321 can be referred to as the main low-voltage battery, and low-voltage battery 322 as the auxiliary low-voltage battery; in this example, the auxiliary low-voltage battery will only be used to power the load after the SOC of the main low-voltage battery drops to threshold 1. Furthermore, to simplify the control of the switch, the second switch (i.e., switch 324) can be set as a normally closed switch.

[0147] In another example, we still assume that thresholds 1 and 2 are both 60%. Initially, if the SOC of both low-voltage batteries is greater than 60%, the power supply system can be controlled to operate in state 1. During operation in state 1, if a short-circuit fault occurs in the power supply path where power supply bus 301 is located, the power supply system can be switched to state 4; then, short-circuit protection will be applied to this path. The changes in the on / off states of each switch during this process can be described as follows: Figure 8 As shown.

[0148] In another example, because short-circuit faults are sporadic and random, the power supply system may be in state 2 before a short-circuit fault occurs. Accordingly, when a sudden short-circuit fault is detected in the power supply line where power supply buses 301 and 302 are located, the power supply system can be controlled to switch to state 4; then, short-circuit protection can be provided for the line where the short-circuit fault occurred.

[0149] In another example, we still assume that thresholds 1 and 2 are both 60%. Initially, if the SOC of both low-voltage batteries is greater than 60%, the power supply system can be controlled to operate in state 1. During operation in state 1, if a collision occurs at the terminal, the power supply system can be switched to state 3. The changes in the on / off states of each switch during this process can be described as follows: Figure 9 As shown.

[0150] Furthermore, if the collision causes a short circuit fault in the power supply line where power supply bus 301 is located, then after detecting the short circuit fault, the power supply system can be controlled to switch to state 4 first, and then short circuit protection can be applied to this power supply line. During this process, the on / off states of each switch can be monitored as follows: Figure 10 As shown.

[0151] The above combination Figures 1 to 10 The power supply system and control method provided in the embodiments of this application have been described by way of example. The following, in conjunction with... Figure 11 and Figure 12 This application introduces a control device provided in its embodiments. The descriptions of the device embodiments correspond to the descriptions of the method embodiments; therefore, any content not described in detail can be found in the method embodiments above.

[0152] For example, Figure 11 This is a schematic block diagram of a control device provided in an embodiment of this application. The device may include modules or units corresponding to the above-described method embodiments.

[0153] For example, the device may include an acquisition unit 2010 and a processing unit 2020. The device 2000 is used to perform... Figure 2In method 200, the acquisition unit 2010 can be used to execute step S210, and the processing unit 2020 can be used to execute step S220.

[0154] Specifically, the acquisition unit 2010 can be used to acquire first information. The processing unit 2020 can be used to control the operating states of the first switch, the second switch, and the disconnecting switch based on the first information.

[0155] For example, in some implementations, the first information may include collision detection information and power supply system operating status information; the processing unit 2020 may be used to: control the isolating switch and the first switch to be in the conducting state when no collision occurs at the terminal and no short circuit fault occurs in the first power supply and the second power supply, and control the working state of the second switch according to the state of charge of the first low-voltage battery.

[0156] For example, in some implementations, the first information may include collision detection information; the processing unit 2020 may be used to: control the first switch, the second switch and the isolating switch to be in the conducting state when a collision is detected at the terminal, and control the DC / DC to be in the disconnected state.

[0157] For example, in some implementations, the first information may include the operating status information of the power supply system; the processing unit 2020 may be used to: control the isolating switch to be in the open state when a short circuit fault occurs in the first power supply and / or the second power supply, and control the first switch and the second switch to be in the on state during the first time period.

[0158] It should be understood that the division of units in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. All units of the above device can be implemented entirely through processor-invoked software, entirely through hardware circuits, or partially through processor-invoked software with the remaining parts implemented through hardware circuits.

[0159] In a specific implementation, the acquisition unit 2010 can be implemented by one or more receivers or receiver-related circuitry. The processing unit 2020 can be implemented by at least one processor or processor-related circuitry. In one example, one or more processors can control the operating states of the first switch, the second switch, and the disconnecting switch based on the first information. Exemplarily, in a specific implementation, the device 2000 can be a control device for a power supply system, or it can be a chip or processor within that control device.

[0160] For example, Figure 12This is a schematic block diagram of another control device 3000 provided in an embodiment of this application. The device 3000 may include a processor 3010, an interface circuit 3020, and a memory 3030. The processor 3010, interface circuit 3020, and memory 3030 are connected via internal connection paths. The memory 3030 is used to store instructions, and the processor 3010 is used to execute the instructions stored in the memory 3030, while the interface circuit 3020 receives / sends some parameters. Optionally, the memory 3030 may be coupled to the processor 3010 via an interface, or it may be integrated with the processor 3010.

[0161] It should be noted that the interface circuit 3020 described above may include, but is not limited to, transceiver devices such as input / output interfaces, to enable communication between device 3000 and other devices or communication networks. For example, control commands can be sent to each switch through the interface circuit 3020.

[0162] This application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to perform the above-described... Figures 1 to 10 Any of the method embodiments and any possible implementation thereof.

[0163] This application also provides a computer-readable storage medium storing program code or instructions that, when executed by a computer's processor, cause the processor to perform the aforementioned tasks. Figures 1 to 10 Any of the method embodiments and any possible implementation thereof.

[0164] This application also provides a chip, including a circuit, for performing the above-described... Figures 1 to 10 Any of the method embodiments and any possible implementation thereof.

[0165] This application also provides a terminal, which may include the aforementioned device 2000 or 3000. For example, the terminal may be a vehicle, drone, robot, etc.

[0166] For example, Figure 13 This is a functional block diagram of a vehicle 100 provided in an embodiment of this application.

[0167] Vehicle 100 may include a perception system 120 and a computing platform 150. The perception system 120 may include one or more sensors for sensing information about the environment surrounding vehicle 100. For example, the perception system 120 may include a positioning system, which may be a Global Positioning System (GPS), a BeiDou system, or another positioning system. The perception system 120 may also include one or more of the following: an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0168] Some or all of the functions of vehicle 100 can be controlled by computing platform 150. Computing platform 150 may include one or more processors, such as processors 151 to 15n (n being a positive integer). A processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a central processing unit (CPU), microprocessor, graphics processing unit (GPU) (which can be understood as a type of microprocessor), or digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. These logical relationships are fixed or reconfigurable. For example, the processor may be a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as a field-programmable gate array (FPGA). In reconfigurable hardware circuits, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the processor loading instructions to implement some or all of the functions of the aforementioned units. In addition, it can also be hardware circuits designed for artificial intelligence, which can be understood as a type of ASIC, such as a neural network processing unit (NPU), tensor processing unit (TPU), deep learning processing unit (DPU), etc. Furthermore, the computing platform 150 may also include a memory for storing instructions. Some or all of the processors 151 to 15n can call the instructions in the memory to implement corresponding functions; for example, controlling the operating state of the power supply system by controlling the on / off state of each switch in the vehicle power supply system.

[0169] It should be noted that the vehicles involved in the embodiments of this application are vehicles in a broad sense, which can be means of transportation (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.), amusement equipment, toy vehicles, etc. For example, the vehicles in this application can include pure electric vehicles (pure electric vehicles / battery electric vehicles, pure EVs / battery EVs), hybrid electric vehicles (HEVs), range-extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), or new energy vehicles (NEVs), etc.

[0170] The detailed description and accompanying drawings of the above embodiments are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0171] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and other forms such as the third-person singular "comprises" and the present participle "comprising" are interpreted as open and inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the foregoing terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be included in any suitable manner in any of the embodiments or examples.

[0172] The terms "first" and "second" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0173] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0174] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0175] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0176] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0177] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0178] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0179] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method, characterized in that, The method includes: Obtain first information, which includes collision detection information and / or power supply system operating status information. The collision detection information indicates whether a collision has occurred at the terminal. The power supply system operating status information includes the state of charge of the first low-voltage battery, the state of charge of the second low-voltage battery, and the power supply system fault detection information. Based on the first information, control the operating status of the first switch, the second switch, and the disconnecting switch; The power supply system includes a high-voltage battery, a first low-voltage battery, a second low-voltage battery, a first power supply bus, a second power supply bus, a first switch, a second switch, a DC-DC converter, and a first circuit for connecting the first power supply bus and the second power supply bus. The first low-voltage battery is connected to the first power supply bus via the first switch, and the first switch is used to control the connection and disconnection between the first low-voltage battery and the first power supply bus; The second low-voltage battery is connected to the second power supply bus via the second switch, and the second switch is used to control the connection and disconnection between the second low-voltage battery and the second power supply bus; The high-voltage battery is connected to at least one of the first power supply bus and the second power supply bus via the DC / DC converter. The first circuit includes the isolating switch, which is used to control the connection and disconnection between the first power supply bus and the second power supply bus.

2. The control method according to claim 1, characterized in that, The first information includes the operating status information of the power supply system, wherein the power supply system provides a first power supply through the first power supply bus and a second power supply through the second power supply bus; The step of controlling the operating states of the first switch, the second switch, and the disconnecting switch based on the first information includes: When a short circuit fault occurs in the first power supply and / or the second power supply, the isolating switch is controlled to be in the open state, and the first switch and the second switch are controlled to be in the on state for a first time period.

3. The control method according to claim 2, characterized in that, The method further includes: After the first time period, control is applied to at least one of the power supplies that has a short-circuit fault, either the first or the second power supply, to perform short-circuit protection.

4. The control method according to claim 1, characterized in that, The first information includes the collision detection information and the operating status information of the power supply system; The step of controlling the operating states of the first switch, the second switch, and the disconnecting switch based on the first information includes: If no collision occurs at the terminal and no short circuit fault occurs in either the first power supply or the second power supply, the isolating switch and the first switch are controlled to be in the conducting state, and the operating state of the second switch is controlled according to the state of charge of the first low-voltage battery.

5. The control method according to claim 4, characterized in that, The step of controlling the operating state of the second switch based on the state of charge of the first low-voltage battery includes: When the state of charge of the first low-voltage battery is greater than the first threshold and the state of charge of the second low-voltage battery is greater than or equal to the recharge threshold of the second low-voltage battery, the second switch is controlled to be in the off state.

6. The control method according to claim 4, characterized in that, The step of controlling the operating state of the second switch based on the state of charge of the first low-voltage battery includes: When the state of charge of the first low-voltage battery is less than or equal to the first threshold, the second switch is controlled to be in the on state.

7. The control method according to claim 5 or 6, characterized in that, The first threshold is greater than the charging threshold of the first low-voltage battery.

8. The control method according to claim 1, characterized in that, The first information includes the collision detection information; The step of controlling the operating states of the first switch, the second switch, and the disconnecting switch based on the first information includes: When a collision is detected at the terminal, the first switch, the second switch, and the isolating switch are controlled to be in the on state, and the DC / DC converter is controlled to be in the off state.

9. The control method according to claim 1, characterized in that, The collision detection information indicates that the terminal has been involved in a collision, and the fault detection information indicates that the first power supply and / or the second power supply has experienced a short circuit fault, and the time when the collision detection information is obtained is earlier than the time when the fault detection information is obtained. The step of controlling the operating states of the first switch, the second switch, and the disconnecting switch based on the first information includes: Based on the collision detection information, the first switch, the second switch, and the isolating switch are controlled to be in the on state, and the DC / DC converter is controlled to be in the off state. Based on the fault detection information, the isolating switch is controlled to be in the open state, and the first switch and the second switch are controlled to be in the on state during the first time period.

10. The control method according to any one of claims 1 to 9, characterized in that, The second switch is a normally closed switch.

11. A control device, characterized in that, Includes modules or units for performing the method as described in any one of claims 1 to 10.

12. A control device, characterized in that, The device includes at least one processor coupled to at least one memory, the at least one processor being configured to execute a computer program or instructions stored in the at least one memory to cause the device to perform the method as described in any one of claims 1 to 10.

13. A computer-readable storage medium, characterized in that, It stores instructions or program code thereon, which, when executed by a processor, cause the processor to implement the method as described in any one of claims 1 to 10.

14. A computer program product, characterized in that, The computer program product includes: computer program code, which, when executed, implements the method as described in any one of claims 1 to 10.

15. A chip, characterized in that, The circuit includes a communication interface for receiving information from other devices and inputting it into the circuit, and / or the communication interface for transmitting information in the circuit to other devices, the circuit being used to perform the method as described in any one of claims 1 to 10.

16. A terminal, characterized in that, Includes the control device as described in claim 11 or 12.

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