Vehicle power supply system, protection control method and vehicle

Abstract

The invention relates to a vehicle power supply system, a protection control method and a vehicle. The vehicle power supply system comprises a plurality of battery packs, each battery pack comprises an energy storage device and a fusing protection device, a power supply circuit is formed between each energy storage device and a power utilization device of a vehicle, the fusing protection devices are arranged on the power supply circuits, and the fusing protection devices are used for cutting off the corresponding power supply circuits; the first protection branch circuits are connected, and the fusing protection device of each battery pack is arranged on the corresponding first protection branch circuit; the control module is used for obtaining fusing trigger signals, the fusing trigger signals comprise thermal safety signals of the battery packs, the control module is in communication connection with the multiple battery packs and the first protection branch circuits, and the control module is configured to control the conduction state of the corresponding first protection branch circuits according to the fusing trigger signals. Therefore, the fusing state of the corresponding fusing protection device is controlled. The vehicle power supply system disclosed by the invention is beneficial to improving the power utilization safety of the vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle power supply systems, and in particular to a vehicle power supply system, a protection control method and a vehicle. Background Art

[0002] New energy vehicles are usually equipped with battery packs, which provide power to drive electric motors and electronic control devices on new energy vehicles.

[0003] Due to the high energy density of the battery pack, any electrical fault (such as short circuit, overcharge or over discharge) may lead to serious consequences, including battery damage or fire. Therefore, improving the safety and reliability of the battery system is the key to ensuring the overall performance of the vehicle. Summary of the invention

[0004] The present application provides a vehicle power supply system, a protection control method and a vehicle, which can monitor the operating status of a 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.

[0005] An embodiment of a first aspect of the present invention provides a vehicle power supply system, comprising:

[0006] A battery pack, wherein there are multiple battery packs, each of which includes an energy storage device and a fuse protection device, each of which is suitable for forming a power supply circuit with an electrical device of the vehicle, and the fuse protection device is arranged in the power supply circuit, and the fuse protection device is used to cut off the corresponding power supply circuit;

[0007] A first protection branch, wherein the fuse protection device of each battery pack is arranged in the corresponding first protection branch;

[0008] A control module is used to obtain a fuse trigger signal, wherein the fuse trigger signal includes a thermal safety signal of the battery pack. The control module is respectively communicated with multiple battery packs and the first protection branch. The control module is configured to control the conduction state of the corresponding first protection branch according to the fuse trigger signal to control the fusing state of the corresponding fuse protection device.

[0009] The vehicle power supply system of the present invention supplies energy to the electrical device through the power supply circuit formed between the battery pack and the electrical device of the vehicle. The protection power source and the first protection branch form a protection circuit. When the control module receives a fuse trigger signal, the corresponding first protection branch is turned on, so that the fuse protection device of the corresponding battery pack cuts off the power supply circuit of the abnormal battery pack, thereby improving the safety of the battery pack.

[0010] 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.

[0011] In some embodiments, the fuse trigger signal also 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.

[0012] In some embodiments, the vehicle power supply system also includes: an emergency stop protection device and a protection power supply, the protection power supply is respectively connected to multiple fuse protection devices through a second protection branch, the emergency stop protection devices are multiple corresponding to the second protection branches, the emergency stop protection device is connected to the protection power supply, and the emergency stop protection device is arranged in the corresponding second protection branch to control the on and off of the second protection branch, and the emergency stop protection device is a manual control device.

[0013] According to some embodiments of the present invention, a plurality of the emergency stop protection devices are configured to be closed or opened synchronously.

[0014] In a second aspect, an embodiment of the present invention further provides a protection control method for a vehicle power supply system, which is applied to the above-mentioned vehicle power supply system and includes the following control steps:

[0015] Get the fuse trigger signal;

[0016] The corresponding fuse protection device of the battery pack is controlled to fuse according to the fuse trigger signal.

[0017] The protection control method of the vehicle power supply system of the present invention, when the battery pack of the vehicle power supply system has an abnormal operation, feeds back a fuse trigger signal to the control module, and the control module controls the first protection branch corresponding to the abnormal battery pack to be turned on, so that the fuse protection device of the abnormal battery pack cuts off the power supply circuit. The response is rapid and timely, which improves the safety of the battery pack and further improves the safety of the vehicle.

[0018] In some embodiments, the fuse trigger signal includes a thermal safety signal of the battery pack;

[0019] After the fusing trigger signal is acquired and before the fusing protection device of the corresponding battery pack is controlled to be blown according to the fusing trigger signal, the method further includes:

[0020] Determine whether there is any abnormality in the communication between the control module and the battery pack:

[0021] If the communication is abnormal, the control module controls all the first protection branches to be turned on;

[0022] If there is no abnormality in the communication, 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.

[0023] In some embodiments, the fuse trigger signal also includes a vehicle safety signal;

[0024] The controlling the corresponding fuse protection device of the battery pack to fuse according to the fuse trigger signal comprises:

[0025] When the vehicle safety signal is acquired, the control module controls all the first protection branches to be turned on.

[0026] In some embodiments, the fuse trigger signal further includes a conduction state of an input signal, and controlling the corresponding fuse protection device of the battery pack to fuse according to the fuse trigger signal includes:

[0027] When the input signal is disconnected, the control module controls all the first protection branches to be turned on.

[0028] In some embodiments, the following steps are also included:

[0029] The operator determines whether there is a need for a fuse to be triggered;

[0030] If present, all the emergency stop protection devices are manually controlled to close so that the fuse protection devices of all the battery packs are blown.

[0031] In a third aspect, an embodiment of the present invention further provides a vehicle, comprising the above-mentioned vehicle power supply system.

[0032] In the vehicle of the present invention, when an abnormality occurs in the battery pack of the power supply circuit, a fuse trigger signal is promptly fed back to the control module, so that the power supply circuit is disconnected in time, thereby preventing the abnormality of the battery pack from continuing to expand, which is beneficial to improving the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] Figure 1 A circuit diagram of a vehicle power supply system according to an embodiment of the present invention;

[0035] Figure 2 A circuit diagram of a vehicle power supply system according to another embodiment of the present invention;

[0036] Figure 3 A circuit diagram of a vehicle power supply system according to another embodiment of the present invention;

[0037] Figure 4 A circuit diagram of a vehicle power supply system according to another embodiment of the present invention;

[0038] Figure 5 is a structural diagram of a vehicle power supply system according to an embodiment of the present invention;

[0039] Figure 6 This is a step diagram of a protection control method for a vehicle power supply system according to an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 100-Vehicle power supply system;

[0042] 110-battery pack; 111-energy storage device; 112-fuse protection device; 113-power supply circuit;

[0043] 120-protection power supply;

[0044] 130-first protection branch;

[0045] 150-control module;

[0046] 160-first access; 161-rescue ring;

[0047] 170-second protection branch;

[0048] 180-Emergency stop protection device. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the implementation of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein. In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner.

[0051] The energy density of existing new energy vehicle battery packs is high, and any electrical failure (such as short circuit, overcharge or over discharge) may lead to serious consequences, including battery damage or fire. Therefore, improving the safety and reliability of the battery system is the key to ensuring the overall performance of the vehicle.

[0052] In view of this, the present invention provides a vehicle power supply system, a protection control method and a vehicle, which can monitor the operating status of a 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.

[0053] refer to Figures 1 to 5 In a first aspect, an embodiment of the present invention provides a vehicle power supply system 100 for supplying power to a motor and other electrical devices of a vehicle. The vehicle power supply system 100 may include: a battery pack 110, a first protection branch 130 and a control module 150.

[0054] The vehicle power supply system 100 has multiple battery packs 110, each of which includes 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, etc., to provide energy for the vehicle power supply system 100. Each energy storage device 111 is suitable for forming a power supply circuit 113 with the vehicle's electrical device. The fuse protection device 112 is arranged in the power supply circuit 113, and the fuse protection device 112 is used to cut off the corresponding power supply circuit 113. For example, the fuse protection device 112 can be an active fuse, and 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 operating state of the battery pack 110 is abnormal, the protection circuit is connected, and the fuse protection device 112 heats up rapidly, so that the conductive wire connected to the power supply circuit 113 in the fuse protection device 112 is melted. At this time, the connection between the energy storage device 111 and the power supply circuit 113 is cut off.

[0055] It is understandable that the power supply circuits 113 formed between each power-consuming device and the energy storage device 111 may be independent of each other, that is, multiple power supply circuits 113 may be provided. Alternatively, the energy storage devices 111 may be connected in parallel to improve the integrity of the vehicle while reducing the impact of the energy storage devices 111 on each other.

[0056] 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 provided in the corresponding first protection branch 130. In this way, when the first protection branch 130 is in the disconnected state, the fuse protection device 112 is not activated, and the battery pack 110 operates normally. When the first protection branch 130 is in the on state, the fuse protection device 112 starts to fuse and cuts off the power supply circuit 113 where the corresponding battery pack 110 is located.

[0057] The control module 150 is used to obtain a fuse trigger signal, and control the conduction state of the corresponding first protection branch 130 according to the fuse trigger signal to control the blown state of the corresponding fuse protection device 112. For example, when the control module 150 does not obtain 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 obtains a fuse trigger signal, the power supply circuit 113 operates abnormally, the first protection branch 130 is turned on, the fuse protection device 112 is blown, and the corresponding protection circuit is cut off.

[0058] refer to Figure 1 , wherein the control module 150 may be an MCU (microcontroller). In this case, the vehicle power supply system may further include a protection power supply 120 and an ignition relay. The protection power supply 120 is respectively connected to a plurality of fuse protection devices 112 through a first protection branch 130. In other words, each battery pack 110 includes a fuse protection device 112. A plurality of power supply circuits 113 that do not interfere with each other or have a small interference effect are formed between each battery pack 110 and the power-consuming device. The fuse protection device 112 of each battery pack 110 is respectively 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 an abnormality occurs in the battery pack 110, the ignition relay connected to the corresponding fuse protection device 112 is controlled to start and close, so that the corresponding first protection branch 130 is turned on, and the fuse protection device 112 cuts off the power supply circuit 113 corresponding to the abnormal battery pack 110.

[0059] It is understandable that in order to reduce the impact on the power supply circuit 113 and control the equipment cost, the protection power supply 120 can select a low-voltage power supply so that the low-voltage power supply meets the fuse voltage of the fuse protection device 112.

[0060] There are multiple ignition relays corresponding to the first protection branch 130 one by one, and the ignition relays are arranged in the corresponding first protection branch 130 to control the on and off of the first protection branch 130. For example, when the ignition relay is turned off, the first protection branch 130 is normally open, and the power supply circuit 113 operates normally. The ignition relay is started, so that the first protection branch 130 is in the on state, and the corresponding fuse protection device 112 in the first protection branch 130 is started, and the power supply circuit corresponding to the fuse protection device 112 is cut off.

[0061] refer to Figure 2 , Figure 3 and Figure 4 Alternatively, the control module 150 may also be an XCU (control chip), which may be a powered chip. Therefore, the first protection branch 130 may be directly connected to the interface of the control module 150, and the XCU may be integrated with a switch control circuit, a control logic or a PWM (pulse width signal modulation method). In this way, the on-off of the first protection branch 130 is directly controlled by the control module 150, and no external ignition relay is required, which saves equipment costs. In addition, the on-off of the first protection branch 130 is directly controlled by the XCU, and the reaction rate is faster, which is beneficial to improving the safety of the vehicle.

[0062] Optionally, when the control module 150 uses PWM (pulse width modulation method) to control the on and off 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 limiting direct drive manner, and an ignition relay is not set, and the circuit reliability is higher.

[0063] Of course, the control module 150 can also be directly connected to the fuse protection device 112 for communication.

[0064] By changing the duty cycle of the PWM signal, accurate control of the connection circuit can be achieved without providing a protection resistor in the first protection branch 130. In this way, bilateral control of the fuse protection device is achieved, the anti-interference performance of the first protection branch 130 is improved, and the probability of the first protection branch 130 being triggered by mistake is reduced.

[0065] Among them, the fuse trigger signal may include a thermal safety signal of the battery pack 110, and the control module 150 is respectively connected to the multiple battery packs 110 and the first protection branch 130. In this way, the control module 150 can detect the operating status of the corresponding battery pack 110, respond in time, control the corresponding first protection branch 130 to be turned on, start the fuse protection device 112, cut off the power supply circuit 113 of the corresponding battery pack 110, improve the safety of the vehicle power supply system 100, and at the same time, other battery packs 110 can operate normally, reduce the impact on the performance of the whole vehicle, and improve the user's satisfaction.

[0066] It can be understood that the thermal safety signal may include: over-temperature warning, uneven temperature distribution warning, abnormal temperature change rate, cooling system failure, thermal runaway warning, external heat source impact warning, circuit abnormality, voltage abnormality, etc. When a thermal safety signal such as cooling system failure, thermal runaway warning, external heat source impact warning, etc. that may affect the entire vehicle power supply system 100 occurs, the control module 150 will simultaneously control all the first protection branches 130 to conduct and cut off the corresponding power supply circuit 113, thereby ensuring the safety of the entire vehicle.

[0067] The vehicle power supply system 100 of the present invention supplies energy to the electrical device through the power supply circuit 113 formed between the battery pack 110 and the electrical device of the vehicle. The protection power supply 120 and the 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 turned on, so that the fuse protection device 112 of the corresponding battery pack 110 is blown to cut off the power supply circuit 113 of the abnormal battery pack 110, thereby improving the safety of the battery pack 110.

[0068] refer to Figure 1 In some embodiments, the fuse trigger signal also includes an input signal, and the control module 150 is also configured to control the conduction state of all the first protection branches 130 according to the conduction state of the received input signal. For the safety of the entire vehicle, when a more serious safety accident occurs, external rescue personnel need to cut off the power supply of the entire vehicle to rescue the people in the vehicle. Generally speaking, a rescue ring will be set on the vehicle. Multiple rescue rings can be set, located in various places in the vehicle passenger compartment. Multiple rescue rings are connected in series to a first channel 160 that communicates with the control module 150, and the input signal is sent to the control module 150 through the first channel 160. In this way, after an accident occurs, when the rescue personnel perform rescue, they only need to pull a rescue ring 161. At this time, the input signal is disconnected, and the control module 150 controls all the first protection branches 130 to conduct and cut off the power supply of the battery pack 110, thereby improving the safety of the equipment.

[0069] refer 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.

[0070] 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 entire vehicle is in an abnormal state at this time. In order to prevent the battery pack 110 from further abnormalities, leading to spontaneous combustion or even explosion, when the control module 150 receives the vehicle safety signal, all first protection branches 130 are controlled to be turned on, so that all fuse protection devices 112 are activated, and all power supply circuits 113 are cut off, thereby improving the safety of the entire vehicle.

[0071] Optionally, the vehicle safety signal may include, but is not limited to, airbag malfunction indication, brake system warning, engine malfunction, high coolant temperature warning, collision warning and other safety warning signals.

[0072] In some embodiments, the vehicle power supply system 100 may also include an emergency stop protection device 180 and a protection power source 120. The protection power sources are respectively connected to a plurality of fuse protection devices 112 through a second protection branch. The emergency stop protection devices are a plurality of devices corresponding to the second protection branch 170. The emergency stop protection device 180 is connected to the protection power source, and the emergency stop protection device 180 is arranged on the corresponding second protection branch 170 to control the on and off of the second protection branch 170. The emergency stop protection device 180 is a manual control device. Another control scheme for the fuse protection device 112 is provided by the second protection branch 170. The driver and passengers in the passenger compartment can manually control the on and off of the second protection branch 170, thereby cutting off the power supply circuit 113 of the entire vehicle, further improving the safety of the vehicle.

[0073] It can be understood that the trigger end of the emergency stop protection device 180 can be set in the passenger compartment. For example, the trigger end of the emergency stop protection device 180 can be set in the driver's cab, or the trigger end of the emergency stop protection device 180 can also be set at the co-pilot's seat. In this way, when an emergency situation occurs to the people on the vehicle (such as sudden illness), other people on the vehicle can cut off the power supply circuit through the emergency stop protection device 180 to stop the vehicle from running, thereby improving the operating safety of the vehicle.

[0074] It can be understood that the fuse protection device 112 is respectively connected to the first protection branch 130 and the second protection branch 170. 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 arranged in parallel, thereby improving the reliability of the vehicle power supply system 100.

[0075] According to some embodiments of the present invention, multiple emergency stop protection devices 180 are configured to be closed or opened synchronously. It can be understood that when the driver or other passengers in the passenger compartment use the emergency stop protection device 180, it must be determined that the vehicle needs to stop safely in a short time. The synchronous closing of multiple emergency stop protection devices 180 is conducive to improving the response rate of cutting off the power supply circuit 113 of the whole vehicle, thereby improving the safety of the whole vehicle.

[0076] Optionally, when the control module 150 uses the XCU control chip, the multiple emergency stop protection devices 180 can also be connected to the fuse protection device 112 for communication, and the fuse protection device 112 can also be connected to the control module 150 for communication. In this way, bilateral control of the emergency stop protection device 180 is formed, which further improves the anti-interference performance of the protection circuit, reduces the probability of the emergency stop protection device 180 being triggered by mistake, and thus improves the reliability of the vehicle power supply system 100.

[0077] refer to Figures 1 to 6 In a second aspect, an embodiment of the present invention further provides a protection control method for a vehicle power supply system, which is applied to the above-mentioned vehicle power supply system 100. The protection control method may include the following control steps:

[0078] S210: Obtaining a fuse trigger signal;

[0079] Optionally, the fuse trigger signal may be a battery thermal safety signal received by the control module 150. In this case, an abnormal situation may occur in the operation of a single battery pack 110. Alternatively, the control module 150 may detect an input signal of communication between the trigger end of the emergency stop protection device 180 in the passenger compartment and the emergency stop protection device 180. The power supply circuit 113 cannot be cut off in the passenger compartment. Alternatively, the fuse trigger signal may be a vehicle safety signal received by the control module 150.

[0080] S210: Controlling the corresponding fuse protection device 112 of the battery pack 110 to fuse according to the fuse trigger signal.

[0081] When the control module 150 determines that the battery pack 110 is operating abnormally according to the received battery thermal safety signal, the operation state of the vehicle is not affected by controlling the power supply circuit 113 of the corresponding battery pack 110. When the control module 150 receives an input signal or a vehicle safety signal, the safety risk of the vehicle is relatively high, and it is necessary to control all power supply circuits 113 of the vehicle power supply system 100 to be disconnected to ensure the safety of the vehicle.

[0082] The protection control method of the vehicle power supply system of the present invention feeds back different fuse trigger signals to the control module 150 when an abnormal operation occurs in the battery pack 110 of the vehicle power supply system 100 or the entire vehicle. The control module 150 controls the first protection branch 130 corresponding to the abnormal battery pack 110 to be turned on, so that the fuse protection device 112 of the abnormal battery pack 110 cuts off the power supply circuit 113. The response is rapid and timely, thereby improving the safety of the battery pack 110 and further improving the safety of the entire vehicle.

[0083] In some embodiments, the fuse trigger signal may include a thermal safety signal of the battery pack 110, and the thermal safety signal may include: overtemperature warning, uneven temperature distribution warning, abnormal temperature change rate, cooling system failure, thermal runaway warning, external heat source impact warning, circuit abnormality and voltage abnormality and other signals.

[0084] Exemplarily, 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 be blown to cut off the power supply circuit 113 of the corresponding battery pack 110. The remaining power supply circuits 113 may not be affected.

[0085] After obtaining the fuse trigger signal, before controlling the fuse protection device 112 of the corresponding battery pack 110 to fuse according to the fuse trigger signal, the method may further include:

[0086] Determine whether there is any abnormality in the communication between the control module 150 and the battery pack 110: If the communication is abnormal, the control module 150 controls all the first protection branches 130 to be turned on; if there is no abnormality in the communication, 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 where the thermal safety signal comes from to be turned on.

[0087] 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 determined. To ensure the safety of the entire vehicle, at this time, all the first protection branches 130 are turned on, so that all the power supply circuits 113 are cut off, so as to facilitate 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 determined. The control module 150 controls the first protection branch 130 corresponding to the battery pack 110 from which the thermal safety signal comes to be turned on, and the power supply circuit 113 of the abnormal battery pack 110 is cut off. Other power supply circuits 113 operate normally, thereby improving the usability of the vehicle.

[0088] In some embodiments, the fuse trigger signal may also include a vehicle safety signal; the vehicle safety signal may include airbag fault indication, brake system warning, engine fault, high coolant temperature warning, collision warning and other safety warning signals.

[0089] For example, when the control module 150 receives a collision warning signal, it means that if the vehicle continues to move, a collision is very likely to occur and the vehicle needs to stop quickly. Therefore, the collision warning serves as a fuse trigger signal, and the control module 150 controls all the first protection branches 130 to be turned on, cutting off the power supply circuits 113 of all the battery packs 110, thereby improving the safety of the vehicle.

[0090] Controlling the corresponding fuse protection device 112 of the battery pack 110 to fuse according to the fuse trigger signal includes:

[0091] When the vehicle safety signal is obtained, the control module 150 controls all the first protection branches 130 to be turned on, so that all the power supply circuits 113 on the vehicle are disconnected, thereby improving the safety of the entire vehicle.

[0092] In some embodiments, the fuse trigger signal also includes the conduction state of the input signal. For the safety of the whole vehicle, when a more serious safety accident occurs, the outside rescue personnel need to cut off the power supply of the whole vehicle to rescue the people in the vehicle. At this time, the conduction state of the input signal can be the conduction state of the input signal between the rescue ring 161 set in the passenger compartment and the control module 150. Multiple rescue rings can be set, located in various places in the passenger compartment of the vehicle. Multiple rescue rings are connected in series to a first passage 160 that communicates with the control module 150, and the input signal is sent to the control module 150 through the first passage 160. In this way, after an accident occurs, when the rescue personnel perform rescue, they only need to pull a rescue ring. At this time, the input signal is disconnected, and the control module 150 controls all the first protection branches 130 to conduct and cut off the power supply of the battery pack 110, thereby improving the safety of the equipment.

[0093] Controlling the corresponding fuse protection device 112 of the battery pack 110 to fuse according to the fuse trigger signal includes: when the input signal is disconnected, that is, after the rescuer pulls the rescue ring 161, the control module 150 controls all the first protection branches 130 to conduct. In this way, after the rescuer pulls the rescue ring 161, when the input signal is disconnected, the control module 150 controls all the first protection branches 130 to conduct, cuts off all the power supply circuits 113, and improves the safety of the vehicle.

[0094] In some embodiments, the protection control method of the vehicle power supply system further includes the following steps:

[0095] The operator (driver or passenger) determines whether there is a fuse triggering requirement, such as brake failure, sudden driver illness, or a possible accident.

[0096] If there is, all the emergency stop protection devices 180 are manually controlled to close, so that the fuse protection devices 112 of all the battery packs 110 are melted. In this way, another safety mechanism is provided for the vehicle. In the case that the control module 150 fails to respond in time, the operator manually controls the emergency stop protection device 180 to close, cuts off the normal power supply circuit 113, and improves the safety of the vehicle.

[0097] In a third aspect, an embodiment of the present invention further provides a vehicle, comprising the above-mentioned vehicle power supply system 100.

[0098] In the vehicle of the present invention, when an abnormality occurs in the battery pack 110 of the power supply circuit 113, a fuse trigger signal is promptly fed back to the control module 150, so that the power supply circuit 113 is disconnected in time, thereby preventing the abnormality of the battery pack 110 from continuing to expand, which is beneficial to improving the safety of the vehicle.

[0099] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0100] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0101] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a" or "" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0102] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0103] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description 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 in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle power supply system, characterized in that: include: A battery pack, wherein there are multiple battery packs, each of which includes an energy storage device and a fuse protection device, each of which is suitable for forming a power supply circuit with an electrical device of the vehicle, and the fuse protection device is arranged in the power supply circuit, and the fuse protection device is used to cut off the corresponding power supply circuit; A first protection branch, wherein the fuse protection device of each battery pack is arranged in the corresponding first protection branch; A control module is used to obtain a fuse trigger signal, wherein the fuse trigger signal includes a thermal safety signal of the battery pack. The control module is respectively communicated with multiple battery packs and the first protection branch. The control module is configured to control the conduction state of the corresponding first protection branch according to the fuse trigger signal to control the fusing state of the corresponding fuse protection device.

2. The vehicle power supply system according to claim 1, characterized in that: The fuse trigger signal also 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.

3. The vehicle power supply system according to claim 1, characterized in that: The fuse trigger signal also 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.

4. The vehicle power supply system according to claim 1, characterized in that: The vehicle power supply system also includes: an emergency stop protection device and a protection power supply, the protection power supply is respectively connected to the multiple fuse protection devices through a second protection branch, the emergency stop protection devices are multiple and correspond one to one with the second protection branch, the emergency stop protection device is connected to the protection power supply, and the emergency stop protection device is arranged on the corresponding second protection branch to control the on and off of the second protection branch, and the emergency stop protection device is a manual control device.

5. The vehicle power supply system according to claim 4, characterized in that: The plurality of emergency stop protection devices are configured to be closed or opened synchronously.

6. A protection and control method for a vehicle power supply system, applied to the vehicle power supply system according to any one of claims 1 to 5, characterized in that: The control steps include: Get the fuse trigger signal; The corresponding fuse protection device of the battery pack is controlled to fuse according to the fuse trigger signal.

7. The protection control method of the vehicle power supply system according to claim 6, characterized in that: The fuse trigger signal includes a thermal safety signal of the battery pack; After the fusing trigger signal is acquired and before the fusing protection device of the corresponding battery pack is controlled to be blown according to the fusing trigger signal, the method further includes: Determine whether there is any abnormality in the communication between the control module and the battery pack: If the communication is abnormal, the control module controls all the first protection branches to be turned on; If there is no abnormality in the communication, 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 control method of the vehicle power supply system according to claim 6, characterized in that: The fuse trigger signal also includes a vehicle safety signal; The controlling the corresponding fuse protection device of the battery pack to fuse according to the fuse trigger signal comprises: When the vehicle safety signal is acquired, the control module controls all the first protection branches to be turned on.

9. The protection control method of the vehicle power supply system according to claim 6, characterized in that: The fuse trigger signal also includes the conduction state of the input signal, and the controlling the corresponding fuse protection device of the battery pack to fuse 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 protection control method of the vehicle power supply system according to claim 6, characterized in that: The following steps are also included: The operator determines whether there is a need for a fuse to be triggered; If present, all the emergency stop protection devices are manually controlled to close so that the fuse protection devices of all the battery packs are blown.

11. A vehicle, characterized in that: include: The vehicle power supply system according to any one of claims 1 to 6.

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