Vehicle power supply system, protection control method, and vehicle

Abstract

The present application relates to a vehicle power supply system (100), a protection control method, and a vehicle. The vehicle power supply system (100) comprises: a plurality of battery packs (110), wherein each battery pack (110) comprises an energy storage device (111) and a fuse (112), a power supply circuit (113) is formed between each energy storage device (111) and an electric device of a vehicle, the fuse (112) is arranged on the corresponding power supply circuit (113), and the fuse (112) is used for disconnecting the corresponding power supply circuit (113); first protection branches (130), wherein the fuse (112) of each battery pack (110) is arranged on a corresponding first protection branch (130); and a control module (150), configured to acquire a fuse trigger signal, wherein the fuse trigger signal comprises a thermal safety signal of each battery pack, the control module (150) is separately communicationally connected to the plurality of battery packs (110) and the first protection branches (130), and the control module (150) is configured to control, on the basis of the fuse trigger signal, a connection state of the corresponding first protection branch (130), so as to control a blown state of the corresponding fuse (112). The vehicle power supply system of the present application is conducive to improving the electrical safety of the vehicle.

Description

Vehicle power supply system, protection and control methods and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202411521919.5, filed on October 29, 2024, entitled "Vehicle Power Supply System, Protection Control Method and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vehicle power supply system technology, and in particular to a vehicle power supply system, protection and control method, and vehicle. Background Technology

[0003] New energy vehicles are typically equipped with battery packs, which provide power to drive electric motors and electronic control devices in new energy vehicles.

[0004] Because of the high energy density of battery packs, any electrical fault (such as a short circuit, overcharge, or over-discharge) can lead to serious consequences, including battery damage or fire. Therefore, improving the safety and reliability of the battery system is crucial to ensuring the overall performance of the vehicle. Summary of the Invention

[0005] This application provides a vehicle power supply system, a protection control method, and a vehicle, which can monitor the operating status of the battery pack and cut off the power supply circuit of the battery pack when the operating status of the battery pack is abnormal, thereby improving the safety of the vehicle.

[0006] An embodiment of the first aspect of this application provides a vehicle power supply system, including:

[0007] A battery pack, wherein there are multiple battery packs, each battery pack includes an energy storage device and a fuse protection device, each energy storage device is adapted to form a power supply circuit with the vehicle's electrical devices, and the fuse protection device is disposed in the power supply circuit and is used to cut off the corresponding power supply circuit;

[0008] The first protection branch, wherein the fuse protection device of each battery pack is provided in the corresponding first protection branch;

[0009] A control module is used to acquire a fuse trigger signal, the fuse trigger signal including the thermal safety signal of the battery pack. The control module is communicatively connected to multiple battery packs and the first protection branch respectively. The control module is configured to control the conduction state of the corresponding first protection branch according to the fuse trigger signal, so as to control the fuse state of the corresponding fuse protection device.

[0010] The vehicle power supply system of this application supplies power to the electrical devices through a power supply circuit formed between the battery pack and the vehicle's electrical devices. A protection circuit is formed by the protection power supply and the first protection branch. When the control module receives a fuse trigger signal, the corresponding first protection branch is activated, causing the fuse protection device of the corresponding battery pack to cut off the power supply circuit to the abnormal battery pack, thereby improving the safety of the battery pack.

[0011] In some embodiments, the fuse trigger signal further includes an input signal, and the control module is further configured to control the conduction state of all the first protection branches according to the conduction state of the received input signal.

[0012] In some embodiments, the fuse trigger signal further includes a vehicle safety signal, and the control module is further configured to control the conduction state of all the first protection branches according to the vehicle safety signal.

[0013] In some embodiments, the vehicle power supply system further includes: an emergency stop protection device and a protective power supply, wherein the protective power supply is connected to a plurality of the fuse protection devices via a second protection branch, the emergency stop protection device is a plurality of devices corresponding one-to-one with the second protection branch, the emergency stop protection device is connected to the protective power supply, and the emergency stop protection device is located in the corresponding second protection branch to control the on / off state of the second protection branch, and the emergency stop protection device is a manual control device.

[0014] According to some embodiments of this application, multiple emergency stop protection devices are configured to close or open synchronously.

[0015] Secondly, embodiments of this application also provide a protection control method for a vehicle power supply system, applied to the aforementioned vehicle power supply system, comprising the following control steps:

[0016] Obtain the circuit breaker trigger signal;

[0017] The fuse trigger signal controls the corresponding fuse protection device of the battery pack to blow.

[0018] The protection and control method for the vehicle power supply system disclosed in this application provides a fuse trigger signal to the control module when the battery pack of the vehicle power supply system malfunctions. The control module then controls the first protection branch corresponding to the malfunctioning battery pack to conduct, causing the fuse protection device of the malfunctioning battery pack to cut off the power supply circuit. This rapid and timely response improves the safety of the battery pack and, consequently, the overall safety of the vehicle.

[0019] In some embodiments, the fuse trigger signal includes the thermal safety signal of the battery pack;

[0020] After the fuse trigger signal is received, and before the fuse protection device of the corresponding battery pack is controlled to blow according to the fuse trigger signal, the method further includes:

[0021] Determine if there are any abnormalities in the communication between the control module and the battery pack:

[0022] If communication fails, the control module controls all first protection branches to be activated.

[0023] If there is no communication abnormality, the source of the thermal safety signal is determined, and the control module controls the first protection branch corresponding to the battery pack from which the thermal safety signal originates to be turned on.

[0024] In some embodiments, the fuse trigger signal further includes a vehicle safety signal;

[0025] The step of controlling the corresponding battery pack's fuse protection device to blow according to the fuse trigger signal includes:

[0026] Upon receiving the vehicle safety signal, the control module controls all the first protection branches to be activated.

[0027] In some embodiments, the fuse trigger signal further includes the conduction state of the input signal, and controlling the corresponding fuse protection device of the battery pack to blow according to the fuse trigger signal includes:

[0028] When the input signal is disconnected, the control module controls all the first protection branches to be turned on.

[0029] In some embodiments, the following steps are also included:

[0030] The operator determines whether a circuit breaker trigger requirement exists;

[0031] If present, manually control all of the emergency stop protection devices to close, so that all of the battery pack's fuse protection devices will blow.

[0032] Thirdly, embodiments of this application also provide a vehicle including the aforementioned vehicle power supply system.

[0033] The vehicle described in this application promptly sends a fuse trigger signal to the control module when the battery pack in the power supply circuit malfunctions, causing the power supply circuit to disconnect in time, preventing the abnormality of the battery pack from escalating further, and thus improving vehicle safety. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] Figure 1 is a circuit diagram of the vehicle power supply system of Embodiment 1 of this application;

[0036] Figure 2 is a circuit diagram of the vehicle power supply system of Embodiment 2 of this application;

[0037] Figure 3 is a circuit diagram of the vehicle power supply system of Embodiment 3 of this application;

[0038] Figure 4 is a circuit diagram of the vehicle power supply system of Embodiment 4 of this application;

[0039] Figure 5 is an architectural diagram of a vehicle power supply system according to an embodiment of this application;

[0040] Figure 6 is a flowchart illustrating the steps of a protection control method for a vehicle power supply system according to an embodiment of this application.

[0041] Explanation of reference numerals in the accompanying drawings: 100-Vehicle power supply system; 110-Battery pack; 111-Energy storage device; 112-Fuse protection device; 113-Power supply circuit; 120-Protection power supply; 130-First protection branch; 150-Control module; 160-First path; 161-Rescue ring; 170-Second protection branch; 180-Emergency stop protection device. The above drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. In embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0044] Existing new energy vehicles have high energy density battery packs, and any electrical fault (such as short circuit, overcharge, or over-discharge) can lead to serious consequences, including battery damage or fire. Therefore, improving the safety and reliability of the battery system is crucial to ensuring the overall performance of the vehicle.

[0045] In view of this, this application provides a vehicle power supply system, a protection control method, and a vehicle, which can monitor the operating status of the battery pack and cut off the power supply circuit of the battery pack when the operating status of the battery pack is abnormal, thereby improving the safety of the vehicle.

[0046] Referring to Figures 1 to 5, in a first aspect, embodiments of this application provide a vehicle power supply system 100 for supplying power to the vehicle's electric motor and other electrical devices. The vehicle power supply system 100 may include a battery pack 110, a first protection branch 130, and a control module 150.

[0047] The vehicle power supply system 100 has multiple battery packs 110, each including an energy storage device 111 and a fuse protection device 112. The energy storage device 111 can be a chemical battery, such as a lithium-ion battery, a lead-acid battery, or a sodium-sulfur battery, to power the vehicle power supply system 100. Each energy storage device 111 is adapted to form a power supply circuit 113 with the vehicle's electrical devices. The fuse protection device 112 is located in the power supply circuit 113 and is used to cut off the corresponding power supply circuit 113. For example, the fuse protection device 112 can be an active fuse. The fuse protection device 112 can also be externally connected to a normally open protection circuit (such as the first protection branch 130 or the second protection branch described later). When the battery pack 110 malfunctions, the protection circuit is activated, and the fuse protection device 112 heats up rapidly, causing the conductive wire connected to the power supply circuit 113 within the fuse protection device 112 to melt. At this time, the connection between the energy storage device 111 and the power supply circuit 113 is cut off.

[0048] Understandably, the power supply circuits 113 formed between each electrical device and the energy storage device 111 can be independent of each other, that is, multiple power supply circuits 113 can be set. Alternatively, the energy storage devices 111 can be connected in parallel to each other, which improves the overall vehicle performance while reducing the mutual influence between the energy storage devices 111.

[0049] The number of first protection branches 130 is matched with the number of battery packs, and the fuse protection device 112 of each battery pack 110 is located in the corresponding first protection branch 130. Thus, when the first protection branch 130 is in the open state, the fuse protection device 112 does not activate, and the battery pack 110 operates normally. When the first protection branch 130 is in the closed state, the fuse protection device 112 activates and blows, cutting off the power supply circuit 113 of the corresponding battery pack 110.

[0050] The control module 150 is used to acquire a fuse trigger signal and control the conduction state of the corresponding first protection branch 130 according to the fuse trigger signal, so as to control the fuse-breaking state of the corresponding fuse protection device 112. For example, when the control module 150 does not acquire a fuse trigger signal, the power supply circuit 113 operates normally, the first protection branch 130 is normally open, and the fuse protection device 112 is not blown. When the control module 150 acquires a fuse trigger signal, the power supply circuit 113 is malfunctioning, the first protection branch 130 is conducting, the fuse protection device 112 blows, and the corresponding protection circuit is cut off.

[0051] Referring to Figure 1, the control module 150 can be an MCU (microcontroller). In this case, the vehicle power supply system can also include a protection power supply 120 and an ignition relay. The protection power supply 120 is connected to multiple fuse protection devices 112 through a first protection branch 130. In other words, each battery pack 110 includes one fuse protection device 112. Each battery pack 110 and the electrical device form multiple power supply circuits 113 that do not interfere with each other or have minimal interference. The fuse protection device 112 of each battery pack 110 is connected to each power supply circuit 113. In addition, the fuse protection device 112 is also connected to a protection circuit including the protection power supply 120 and the first protection branch 130. When a battery pack 110 malfunctions, the ignition relay connected to the corresponding fuse protection device 112 is activated and closed, causing the corresponding first protection branch 130 to conduct. The fuse protection device 112 cuts off the power supply circuit 113 corresponding to the malfunctioning battery pack 110.

[0052] Understandably, in order to reduce the impact on the power supply circuit 113 and the cost of the control equipment, the protection power supply 120 can be a low-voltage power supply, which only needs to meet the fusing voltage of the fuse protection device 112.

[0053] There are multiple ignition relays, each corresponding to a first protection branch 130. Each ignition relay is located in its corresponding first protection branch 130 to control the on / off state of the first protection branch 130. For example, when the ignition relay is off, the first protection branch 130 is normally open, and the power supply circuit 113 operates normally. When the ignition relay is activated, the first protection branch 130 is in a conducting state, and the corresponding fuse protection device 112 within the first protection branch 130 is activated, cutting off the power supply circuit corresponding to the fuse protection device 112.

[0054] Referring to Figures 2, 3, and 4, the control module 150 can also be an XCU (control chip), which can be a live chip. The XCU can have a connection interface, and the first protection branch 130 can be directly connected to the corresponding connection interface of the control module 150 (the specific wiring method is not shown in the figure). The XCU can integrate a switch control circuit, control logic, or PWM (pulse width modulation method). In this way, the control module 150 can directly control the on / off state of the first protection branch 130, eliminating the need for an external ignition relay, thus saving equipment costs. Furthermore, direct control of the on / off state of the first protection branch 130 through the XCU results in a faster response rate, which is beneficial to improving vehicle safety.

[0055] Optionally, when the control module 150 uses PWM (Pulse Width Modulation) to control the on / off state of the first protection branch 130, a protection resistor can be set in the first protection branch 130, so that the control module 150 controls the fuse protection device 112 in a current-limited direct drive manner, without setting an ignition relay, and the reliability of the circuit is higher.

[0056] Of course, the control module 150 can also be directly connected to the fuse protection device 112 for communication.

[0057] By changing the duty cycle of the PWM signal, precise control of the connected circuit can be achieved even without a protection resistor in the first protection branch 130. This enables dual-sided control of the fuse protection device, improves the anti-interference capability of the first protection branch 130, and reduces the probability of the first protection branch 130 being falsely triggered.

[0058] The fuse trigger signal may include a thermal safety signal from the battery pack 110. The control module 150 is communicatively connected to multiple battery packs 110 and the first protection branch 130. Thus, the control module 150 can detect the operating status of the corresponding battery pack 110, react promptly, control the corresponding first protection branch 130 to conduct, activate the fuse protection device 112, and cut off the power supply circuit 113 of the corresponding battery pack 110, improving the safety of the vehicle power supply system 100. Simultaneously, other battery packs 110 can operate normally, reducing the impact on overall vehicle performance and improving user satisfaction.

[0059] Understandably, thermal safety signals can include: overheating warnings, uneven temperature distribution warnings, abnormal temperature change rate warnings, cooling system malfunctions, thermal runaway warnings, external heat source influence warnings, circuit abnormalities, and voltage abnormalities. When a thermal safety signal such as a cooling system malfunction, thermal runaway warning, or external heat source influence warning occurs that may affect the entire vehicle power supply system 100, the control module 150 will simultaneously control all first protection branches 130 to conduct, cutting off the corresponding power supply circuit 113, thereby ensuring the safety of the entire vehicle.

[0060] The vehicle power supply system 100 of this application supplies power to the electrical devices through a power supply circuit 113 formed between the battery pack 110 and the vehicle's electrical devices. A protection power supply 120 and a first protection branch 130 form a protection circuit. When the control module 150 receives a fuse trigger signal, the corresponding first protection branch 130 is activated, causing the fuse protection device 112 of the corresponding battery pack 110 to blow, thereby cutting off the power supply circuit 113 of the abnormal battery pack 110 and improving the safety of the battery pack 110.

[0061] Referring to Figure 1, in some embodiments, the fuse trigger signal also includes an input signal, and the control module 150 is further configured to control the conduction state of all first protection branches 130 according to the conduction state of the received input signal. For vehicle safety considerations, in the event of a serious accident, external rescue personnel need to cut off the vehicle's power supply to rescue occupants. Generally, a rescue ring is installed on the vehicle; multiple rescue rings can be installed at various locations within the vehicle's passenger compartment. These multiple rescue rings are connected in series to a first communication channel 160 that communicates with the control module 150, sending input signals to the control module 150 through the first communication channel 160. Thus, after an accident, when rescue personnel conduct a rescue, they only need to pull one rescue ring 161. At this time, the input signal is disconnected, and the control module 150 controls all first protection branches 130 to conduct, cutting off the power supply to the battery pack 110, thereby improving equipment safety.

[0062] Referring to Figures 2 to 4, optionally, the first path 160 can be directly connected to the first protection branch 130 to reduce equipment costs, or the first path 160 can also be connected to an independent power supply to improve the reliability of the vehicle power supply system 100.

[0063] In some embodiments, the fuse trigger signal also includes a vehicle safety signal, and the control module 150 is further configured to control the conduction state of all first protection branches 130 according to the vehicle safety signal. When the control module 150 receives the vehicle safety signal, the vehicle is in an abnormal state. To prevent further abnormalities in the battery pack 110 that could lead to spontaneous combustion or even explosion, the control module 150 controls all first protection branches 130 to conduct when it receives the vehicle safety signal, thereby activating all fuse protection devices 112, cutting off all power supply circuits 113, and improving vehicle safety.

[0064] Optionally, vehicle safety signals may include, but are not limited to, safety warning signals such as airbag malfunction indication, brake system warning, engine malfunction, high coolant temperature warning, and collision warning.

[0065] In some embodiments, the vehicle power supply system 100 may further include an emergency stop protection device 180 and a protective power supply 120. The protective power supply is connected to multiple fuse protection devices 112 via a second protective branch. Each emergency stop protection device corresponds to one of the second protective branches 170. The emergency stop protection device 180 is connected to the protective power supply and is located in its corresponding second protective branch 170 to control the on / off state of the second protective branch 170. The emergency stop protection device 180 is a manually controlled device. The second protective branch 170 provides another control scheme for the fuse protection devices 112. The driver and passengers in the passenger compartment can manually control the on / off state of the second protective branch 170 to cut off the vehicle's power supply circuit 113, further improving vehicle safety.

[0066] Understandably, the trigger terminal of the emergency stop protection device 180 can be located in the passenger compartment. For example, the trigger terminal of the emergency stop protection device 180 can be located in the driver's cab, or it can be located in the passenger seat. In this way, when an emergency occurs (such as a sudden illness) to the passengers, other passengers can use the emergency stop protection device 180 to cut off the power supply circuit and stop the vehicle from running, thus improving the vehicle's operational safety.

[0067] Understandably, the fuse protection device 112 is connected to the first protection branch 130 and the second protection branch 170 respectively. In order to avoid mutual interference between the first protection branch 130 and the second protection branch 170, the first protection branch 130 and the second protection branch 170 can be connected in parallel, thereby improving the reliability of the vehicle power supply system 100.

[0068] According to some embodiments of this application, multiple emergency stop protection devices 180 are configured to close or open synchronously. It is understood that when the driver or other passengers in the passenger compartment use the emergency stop protection device 180, it necessarily indicates a need for the vehicle to stop safely within a short time. The synchronous closing of multiple emergency stop protection devices 180 helps to improve the response rate of cutting off the vehicle's power supply circuit 113, thereby improving the overall vehicle safety.

[0069] Optionally, when the control module 150 uses an XCU control chip, the multiple emergency stop protection devices 180 can also communicate with the fuse protection device 112, and the fuse protection device 112 can also communicate with the control module 150. This forms a dual-sided control of the emergency stop protection device 180, further improving the anti-interference capability of the protection circuit, reducing the probability of the emergency stop protection device 180 being falsely triggered, and thus improving the reliability of the vehicle power supply system 100.

[0070] Referring to Figures 1 to 6, in a second aspect, embodiments of this application also provide a protection control method for a vehicle power supply system, applied to the aforementioned vehicle power supply system 100. The protection control method may include the following control steps:

[0071] S210: Obtain the fuse trigger signal;

[0072] Optionally, the fuse trigger signal may be a battery thermal safety signal received by the control module 150. In this case, it may be that the operation of a single battery pack 110 is abnormal, or it may be that the control module 150 detects an input signal for communication between the trigger terminal of the emergency stop protection device 180 in the passenger compartment and the emergency stop protection device 180, and the power supply circuit 113 cannot be cut off in the passenger compartment. Alternatively, the fuse trigger signal may also be a vehicle safety signal received by the control module 150.

[0073] S210: Control the corresponding battery pack 110's fuse protection device 112 to blow according to the fuse trigger signal.

[0074] When the control module 150 determines that the battery pack 110 is malfunctioning based on the received battery thermal safety signal, it controls the power supply circuit 113 of the corresponding battery pack 110 without affecting the overall vehicle operation. When the control module 150 receives an input signal or a vehicle safety signal, indicating a higher safety risk to the vehicle, it needs to disconnect all power supply circuits 113 of the vehicle power supply system 100 to ensure vehicle safety.

[0075] The protection and control method for the vehicle power supply system of this application provides different fuse trigger signals to the control module 150 when the battery pack 110 or the vehicle as a whole experiences an abnormal operation. The control module 150 then controls the first protection branch 130 corresponding to the abnormal battery pack 110 to be turned on, causing the fuse protection device 112 of the abnormal battery pack 110 to cut off the power supply circuit 113. This rapid and timely response improves the safety of the battery pack 110 and, consequently, the overall safety of the vehicle.

[0076] In some embodiments, the fuse trigger signal may include a thermal safety signal of the battery pack 110, which may include signals such as: overheat warning, uneven temperature distribution warning, abnormal temperature change rate, cooling system failure, thermal runaway warning, external heat source influence warning, circuit abnormality, and voltage abnormality.

[0077] For example, when the operating temperature of a battery pack 110 is too high, the control module 150 receives an over-temperature warning signal. At this time, the over-temperature warning signal is a fuse trigger signal. The control module 150 controls the corresponding first protection branch 130 to be turned on, and controls the corresponding fuse protection device 112 to melt and cut off the power supply circuit 113 of the corresponding battery pack 110. The other power supply circuits 113 can remain unaffected.

[0078] After receiving the fuse trigger signal, and before controlling the fuse protection device 112 of the corresponding battery pack 110 to blow according to the fuse trigger signal, the system may further include:

[0079] Determine if there is any communication abnormality between the control module 150 and the battery pack 110: if there is a communication abnormality, the control module 150 controls all the first protection branches 130 to be turned on; if there is no communication abnormality, determine the source of the thermal safety signal, and the control module 150 controls the first protection branch 130 corresponding to the battery pack 110 from which the thermal safety signal originates to be turned on.

[0080] In this embodiment, if the communication between the control module 150 and the battery pack 110 is abnormal, the corresponding abnormal battery pack 110 cannot be identified. To ensure vehicle safety, all first protection branches 130 are activated, causing all power supply circuits 113 to be disconnected, facilitating the investigation of the abnormal battery pack 110. If the communication between the control module 150 and the battery pack 110 is normal, the abnormal battery pack 110 can be directly identified. The control module 150 activates the first protection branch 130 corresponding to the battery pack 110 from which the thermal safety signal originates, disconnecting the power supply circuit 113 of the abnormal battery pack 110. Other power supply circuits 113 operate normally, improving vehicle usability.

[0081] In some embodiments, the fuse trigger signal may also include vehicle safety signals; vehicle safety signals may include safety warning signals such as airbag malfunction indication, brake system warning, engine malfunction, high coolant temperature warning, and collision warning.

[0082] For example, when the control module 150 receives a collision warning signal, it indicates that the vehicle is continuing to drive and a collision is highly likely. The vehicle needs to stop quickly. Therefore, the collision warning signal is used as a fuse trigger signal. The control module 150 controls all the first protection branches 130 to be turned on, cutting off the power supply circuits 113 of all battery packs 110, thereby improving the safety of the vehicle.

[0083] The fuse protection device 112 of the corresponding battery pack 110 is controlled to blow according to the fuse trigger signal, including:

[0084] Upon receiving a vehicle safety signal, the control module 150 activates all first protection branches 130. This disconnects all power supply circuits 113 in the vehicle, thereby improving overall vehicle safety.

[0085] In some embodiments, the fuse trigger signal also includes the conduction state of the input signal. For vehicle safety considerations, in the event of a serious accident, external rescue personnel need to cut off the vehicle's power supply to rescue occupants. In this case, the conduction state of the input signal can be the conduction state of the input signal between the rescue ring 161 located in the passenger compartment and the control module 150. Multiple rescue rings can be installed, located throughout the vehicle's passenger compartment. These multiple rescue rings are connected in series to a first communication path 160 that communicates with the control module 150, sending input signals to the control module 150 through the first communication path 160. Thus, after an accident, when rescue personnel conduct a rescue, they only need to pull one rescue ring. At this time, the input signal is disconnected, and the control module 150 controls all first protection branches 130 to conduct, cutting off the power supply to the battery pack 110, thereby improving equipment safety.

[0086] The control module 150 controls the fuse protection device 112 of the corresponding battery pack 110 to blow according to the fuse trigger signal. This includes: when the input signal is disconnected, i.e., after the rescuer pulls the rescue ring 161, the control module 150 controls all the first protection branches 130 to conduct. Thus, when the input signal is disconnected after the rescuer pulls the rescue ring 161, the control module 150 controls all the first protection branches 130 to conduct, cutting off all power supply circuits 113 and improving vehicle safety.

[0087] In some embodiments, the protection control method for a vehicle power supply system further includes the following steps:

[0088] The operator (driver or passenger) determines whether there is a need to trigger the circuit breaker, such as in the event of brake failure, driver's sudden illness, or a judgment that an accident may occur.

[0089] If present, all emergency stop protection devices 180 are manually closed to cause the fuse protection devices 112 of all battery packs 110 to blow. This provides another layer of safety for the vehicle. If the control module 150 fails to react in time, the operator can manually close the emergency stop protection device 180 to cut off the normal power supply circuit 113, thus improving the overall safety of the vehicle.

[0090] Thirdly, embodiments of this application also provide a vehicle including the vehicle power supply system 100 described above.

[0091] In the vehicle described in this application, when the battery pack 110 of the power supply circuit 113 malfunctions, a fuse trigger signal is promptly sent to the control module 150, causing the power supply circuit 113 to disconnect in time, preventing the malfunction of the battery pack 110 from escalating further, which helps to improve the safety of the vehicle.

[0092] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0093] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0094] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "one" or "" can also be understood to convey either singular or plural usage.

[0095] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0096] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A vehicle power supply system (100), characterized by, include: A battery pack (110), wherein there are multiple battery packs (110), each battery pack (110) includes an energy storage device (111) and a fuse protection device (112), each energy storage device (111) is adapted to form a power supply circuit (113) with the vehicle's electrical devices, the fuse protection device (112) is disposed in the power supply circuit (113), and the fuse protection device (112) is used to cut off the corresponding power supply circuit (113); The first protection branch (130) is provided with the fuse protection device (112) of each battery pack (110) in the corresponding first protection branch (130); A control module (150) is used to acquire a fuse trigger signal, the fuse trigger signal including the thermal safety signal of the battery pack. The control module (150) is communicatively connected to multiple battery packs (110) and the first protection branch (130). The control module (150) is configured to control the conduction state of the corresponding first protection branch (130) according to the fuse trigger signal, so as to control the fuse state of the corresponding fuse protection device (112).

2. The vehicle power supply system (100) according to claim 1, characterized in that The fuse trigger signal also includes an input signal, and the control module (150) is further configured to control the conduction state of all the first protection branches (130) according to the conduction state of the received input signal.

3. The vehicle power supply system (100) according to claim 1 or 2, characterized in that The fuse trigger signal also includes a vehicle safety signal, and the control module (150) is further configured to control the conduction state of all the first protection branches (130) according to the vehicle safety signal.

4. The vehicle power supply system (100) according to any one of claims 1-3, characterized in that, The vehicle power supply system (100) further includes an emergency stop protection device (180) and a protection power supply (120). The protection power supply (120) is connected to multiple fuse protection devices (112) via a second protection branch (170). The emergency stop protection device (180) is a plurality of devices corresponding one-to-one with the second protection branch (170). The emergency stop protection device (180) is connected to the protection power supply (120) and is located in the corresponding second protection branch (170) to control the on / off state of the second protection branch (170). The emergency stop protection device (180) is a manual control device.

5. The vehicle power supply system (100) according to claim 4, characterized in that Multiple emergency stop protection devices (180) are configured to close or open synchronously.

6. A protection control method of a vehicle power supply system according to any one of claims 1 to 5, characterized by The following control steps are included: Obtain the circuit breaker trigger signal; The fuse trigger signal controls the corresponding fuse protection device of the battery pack to blow.

7. The protection and control method for a vehicle power supply system according to claim 6, characterized in that, The fuse trigger signal includes the thermal safety signal of the battery pack; After the fuse trigger signal is received, and before the fuse protection device of the corresponding battery pack is controlled to blow according to the fuse trigger signal, the method further includes: Determine if there are any abnormalities in the communication between the control module and the battery pack: If communication fails, the control module controls all first protection branches to be activated. If there is no communication abnormality, the source of the thermal safety signal is determined, and the control module controls the first protection branch corresponding to the battery pack from which the thermal safety signal originates to be turned on.

8. The protection and control method for a vehicle power supply system according to claim 6 or 7, characterized in that, The fuse trigger signal also includes a vehicle safety signal; The step of controlling the corresponding battery pack's fuse protection device to blow according to the fuse trigger signal includes: Upon receiving the vehicle safety signal, the control module controls all the first protection branches to be activated.

9. The method of claim 6-8, wherein The fuse trigger signal also includes the conduction state of the input signal, and the step of controlling the corresponding fuse protection device of the battery pack to blow according to the fuse trigger signal includes: When the input signal is disconnected, the control module controls all the first protection branches to be turned on.

10. The method of claim 6-9, wherein It also includes the following steps: The operator determines whether a circuit breaker trigger requirement exists; If present, manually control all of the emergency stop protection devices to close, so that all of the battery pack's fuse protection devices will blow.

11. A vehicle characterized by comprising: include: The vehicle power supply system according to any one of claims 1-5.

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