Battery management system and electric device

Abstract

The utility model provides a battery management system and an electric device, and belongs to the technical field of batteries. The battery management system includes: a plurality of power sources configured to output electrical energy to at least one load; and the power supply circuit is connected between the plurality of power supplies and the at least one load, the power supply circuit comprises a plurality of groups of power supply circuits, and each group of power supply circuits is configured to transmit electric energy output by at least one power supply of the plurality of power supplies to the at least one load. The battery management system can improve the reliability of the power supply process.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery management system and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of industries, and electricity plays an increasingly important role in this development due to its environmental advantages. Among these factors, battery technology is a crucial element in its development.

[0003] As the functions of various electrical devices become increasingly complex, the amount of hardware used also increases. For battery systems, this means more sources of interference, posing further challenges to their stability. Improving the stability of battery systems and reducing the risk of power supply anomalies is of great significance for meeting the ever-increasing power supply demands of systems. Utility Model Content

[0004] This application aims to at least address the technical problem in the prior art where the stability of battery systems cannot meet the power supply requirements of the system. Therefore, one objective of this application is to provide a battery management system to improve the stability of the battery system and enhance the reliability of the power supply process.

[0005] An embodiment of the first aspect of this application provides a battery management system, including: a plurality of power sources configured to output electrical energy to at least one load; and a power supply circuit connected between the plurality of power sources and at least one load, the power supply circuit including a plurality of power supply circuits, each of the plurality of power supply circuits being configured to transmit electrical energy output by at least one of the plurality of power sources to at least one load.

[0006] In the technical solution of this application embodiment, by setting multiple power sources and a power supply circuit including multiple power supply circuits, the electrical energy output by multiple power sources can be used to power the load. Even if some of the power sources fail, the load can still receive electrical energy output by other power sources, reducing the risk that the load cannot work properly due to abnormal power supply and improving the reliability of the power supply system.

[0007] In some embodiments, multiple power supply circuits correspond one-to-one with multiple power sources, and each power supply circuit is connected between the corresponding power source and at least one load. Providing a separate power supply circuit between each power source and the load allows the electrical energy output from multiple power sources to be transmitted to the load through independent power supply paths, reducing the risk of power supply abnormalities to the load due to power supply circuit malfunctions.

[0008] In some embodiments, any one of the multiple power supply circuits is connected to each load. By configuring each power supply circuit to be connected to all loads, the electrical energy output from the power supply connected to that circuit can be distributed to all loads, thus enabling power supply to all loads when the power supply is functioning normally. Using this design, all loads can be powered when one of the multiple power supplies is functioning correctly, improving the reliability of the power supply system.

[0009] In some embodiments, each of the multiple power supply circuits includes multiple power supply units, and each power supply unit includes at least one power supply device. Providing multiple power supply units in each power supply circuit improves circuit redundancy design, allowing the power output to be transmitted to the load through multiple different power supply paths, thus reducing the risk of power supply anomalies due to failure of some power supply devices.

[0010] In some embodiments, the multi-stage power supply unit includes: at least one primary power supply device connected to at least one of a plurality of power supplies; and at least one secondary power supply device connected between the at least one primary power supply device and at least one load. Providing two series-connected power supply devices can improve circuit redundancy design while simplifying circuit design and reducing circuit design costs.

[0011] In some embodiments, each primary power supply device is connected to every secondary power supply device. Setting each primary power supply device in each power supply circuit to be connected to all secondary power supply devices in that group of power supply circuits improves circuit redundancy design. When any primary or secondary power supply device in the group of power supply circuits is operating normally, the group of power supply circuits can be used to transmit electrical energy to the load, thus improving the reliability of the power supply system.

[0012] In some embodiments, at least one primary power supply device in any one of the multiple power supply circuits is connected to each secondary power supply device in each of the multiple power supply circuits. Setting each primary power supply device to be connected to all secondary power supply devices improves circuit redundancy design. When any primary or secondary power supply device in the power supply circuit is operating normally, power can be transferred to the load, thus improving the reliability of the power supply system.

[0013] In some embodiments, a one-to-one correspondence is established between the secondary power supply devices and the loads, with each secondary power supply device connected between at least one primary power supply device and the corresponding load. By configuring the secondary power supply devices and loads in a one-to-one correspondence within each power supply circuit, electrical energy can be transferred to the corresponding loads through the secondary power supply devices, improving circuit redundancy design.

[0014] In some embodiments, each of the multiple power supply circuits includes at least one different primary power supply device. Using different primary power supply devices in different groups of power supply circuits can reduce the risk of all primary power supply devices failing, thereby improving the reliability of the power supply system.

[0015] In some embodiments, each of the multiple power supply circuits includes at least one different secondary power supply device. Using different secondary power supply devices in different groups of power supply circuits can reduce the risk of all secondary power supply devices failing, thereby improving the reliability of the power supply system.

[0016] In some embodiments, any one of the multiple power supply circuits is connected to each power source. By configuring each power supply circuit to be connected to all power sources, the electrical energy output from all power sources can be transferred to the load connected to that power supply circuit. When a power source among the multiple power sources is capable of supplying power normally, the electrical energy can be transferred to the load, thus improving the reliability of the power supply system.

[0017] In some embodiments, a power supply circuit is incorporated into the battery management system. Incorporating the power supply circuit into the battery management system enables the system to control the power supply process, thereby improving its reliability.

[0018] In some embodiments, multiple power sources include power batteries and / or generators. Using different power sources can reduce the risk of all power sources failing simultaneously and reduce the likelihood of power supply anomalies.

[0019] An embodiment of the second aspect of this application provides an electrical device, including a battery management system as described in the above embodiments.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application;

[0023] Figure 2 This is a schematic diagram of a battery management system according to some embodiments of this application;

[0024] Figure 3 This is a schematic diagram of a battery management system according to other embodiments of this application;

[0025] Figure 4 This is a schematic diagram of a battery management system according to other embodiments of this application;

[0026] Figure 5 This is a schematic diagram of a battery management system according to other embodiments of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1000 electrical appliances;

[0029] Battery management system 100, controller 200, motor 300;

[0030] Power supply 110, power circuit 120, load 130;

[0031] Multiple power supply circuits 121, primary power supply device 1211, secondary power supply device 1212. Detailed Implementation

[0032] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0038] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, electric cars, and electric vertical take-off and landing (eVTOL) aircraft, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, the market demand is also constantly increasing.

[0041] As the functions of electrical devices such as eVTOL become increasingly complex, the number of hardware components also increases. For battery systems, this means more sources of interference, posing further challenges to their stability. For example, high-power appliances such as air conditioner compressors and motors may pull the power supply voltage to extremely low values ​​at startup; or the power supply system may experience voltage or current surges of varying degrees under conditions such as sudden load disconnection. These phenomena can affect the stability and reliability of the battery system, potentially leading to power failure, or even system crashes or restarts. Therefore, single-power supply systems can no longer meet the ever-increasing power demand, necessitating redundant design of the power supply system to reduce the risk of power supply anomalies.

[0042] Based on the above considerations, a battery management system (BMS) can be used to power the load. A BMS contains multiple power sources and power circuits. The power circuits can transfer electrical energy from these multiple power sources to the load; as long as a working power source is available, the load can receive electrical energy through the power circuits.

[0043] Using such a battery management system can effectively reduce the risk of loads failing to function properly due to abnormal power supply, and improve the reliability of the power supply system.

[0044] The battery management system disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. Using a battery management system disclosed in this application helps reduce the risk of power supply anomalies and improves the reliability of the power supply system.

[0045] This application provides an electrical device using a battery management system. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0046] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application. The electrical device 1000 can be a new energy vehicle or an electric vertical takeoff and landing aircraft, etc. A battery management system 100 is internally provided in the electrical device 1000, which can be located at the bottom, head, or tail of the electrical device 1000. The battery management system 100 can be used to supply power to the electrical device 1000; for example, the battery management system 100 can serve as the operating power source for the electrical device 1000. The electrical device 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery management system 100 to supply power to the motor 300, for example, to meet the power needs of the electrical device 1000 during startup, navigation, and operation.

[0047] In some embodiments of this application, the battery management system 100 can not only serve as the operating power source for the electrical device 1000, but also as the driving power source for the electrical device 1000, replacing or partially replacing fuel oil or natural gas to provide driving power for the electrical device 1000.

[0048] This application provides a battery management system. (See reference...) Figure 2 The battery management system 100 includes multiple power sources 110 and power circuits 120.

[0049] Multiple power sources 110 are configured to output electrical energy to at least one load 130.

[0050] The power supply circuit 120 is connected between a plurality of power sources 110 and at least one load 130. The power supply circuit 120 includes a plurality of power supply circuits 121. Each of the plurality of power supply circuits 121 is configured to transmit electrical energy output from at least one of the plurality of power sources 110 to at least one load 130.

[0051] In embodiments of this application, the power source may include devices capable of outputting electrical energy, such as batteries and generators. The load may include devices performing different functions in an eVTOL (e-Vehicle Variable Telemetry) device, such as an air conditioner compressor, lighting equipment, and audio equipment. A power supply device is provided in the power supply circuit. The power supply device includes a device capable of realizing electrical energy transmission, such as a voltage conversion chip and a zoned power supply chip.

[0052] like Figure 2 As shown, the battery management system 100 supplies power to the load 130. Each power supply circuit in the power supply circuit 120 is connected between the corresponding power source 110 and the load 130, thereby transferring electrical energy output from the power source 110 to the load 130. In one example, multiple power supply circuits 121 can be configured to be connected in parallel with each other. The specific circuit design of the power supply circuit 120 will be described in detail below.

[0053] By setting up multiple power sources and a power supply circuit that includes multiple power supply circuits, the load can be powered by the electrical energy output from multiple power sources. Even if some of the power sources fail, the load can still receive electrical energy from the other power sources, reducing the risk of the load failing to work properly due to power supply abnormalities and improving the reliability of the power supply system.

[0054] According to some embodiments of this application, reference is made to Figure 3 Each of the multiple power supply circuits 121 corresponds to one of the multiple power sources 110. Each power supply circuit in the multiple power supply circuits 121 is connected between the corresponding power source 110 and at least one load 130.

[0055] like Figure 3As shown, each power supply 110 is connected to a set of power supply circuits, which connect the power supply 110 to the load 130, thereby transmitting the electrical energy output by the power supply 110 to the load 130.

[0056] By setting up a separate power supply circuit between each power source and the load, the electrical energy output from multiple power sources can be transmitted to the load through independent power supply paths, reducing the risk of power supply abnormalities to the load due to power supply circuit malfunctions.

[0057] According to some embodiments of this application, any one of the multiple power supply circuits 121 is connected to each load 130.

[0058] like Figure 3 As shown, each power supply circuit in the diagram is connected to all loads 130. Figure 3 In the example shown, components such as diodes can also be placed between the power supply circuit and each load 130 to improve power transmission quality and suppress interference signals.

[0059] For each power source 110, the electrical energy output by the power source 110 can be transmitted to all loads 130 through a set of power supply circuits connected to it.

[0060] By configuring each power supply circuit to be connected to all loads, the power output from the power supply connected to that circuit can be distributed to all loads, thus ensuring power supply to all loads when the power supply is functioning correctly. Using this design, all loads can be powered as long as one of the multiple power supplies is functioning properly, improving the reliability of the power supply system.

[0061] According to some embodiments of this application, each of the multiple power supply circuits 121 includes multiple power supply units. Each power supply unit in the multiple power supply units includes at least one power supply device.

[0062] like Figure 3 As shown, each power supply circuit has multiple power supply units. The different power supply units at different levels are connected in series. Figure 3 In the example shown, each power supply circuit has two power supply units. It should be understood that, although in Figure 3 Only two power supply units are shown in this embodiment, but in other embodiments, the number of power supply units can be designed according to usage requirements, and this disclosure does not limit this.

[0063] In some embodiments, the number of power supply units located in the subsequent power supply unit (i.e., power supply units closer to load 130) can be set to be greater than the number of power supply units located in the preceding power supply unit (i.e., power supply units closer to power supply 110). For example, in Figure 3 In the example shown, for each power supply circuit, the power supply unit in the later stage includes two power supply units, while the power supply unit in the earlier stage includes only one power supply unit. Using this circuit configuration improves circuit redundancy design while minimizing the number of power supply units required.

[0064] Setting up multiple power supply units in each power supply circuit can improve the redundancy design of the circuit, so that the power output of the power supply can be transmitted to the load through multiple different power supply paths, reducing the risk of power supply abnormalities due to failure of some power supply devices.

[0065] According to some embodiments of this application, the multi-level power supply unit includes at least one primary power supply device 1211 and at least one secondary power supply device 1212.

[0066] At least one primary power supply device 1211 is connected to at least one of the plurality of power supplies 110.

[0067] At least one secondary power supply unit 1212 is connected between at least one primary power supply unit 1211 and at least one load 130.

[0068] like Figure 3 As shown, the primary power supply device 1211 is a power supply device located in the front-end power supply unit and is connected to the corresponding power source 110. The secondary power supply device 1212 is a power supply device located in the rear-end power supply unit and is connected to the corresponding electrical equipment 130.

[0069] In one example, the primary power supply device 1211 can use a step-down chip to convert the electrical energy output from the power supply 110 into voltage that can be used by the load 130. The secondary power supply device 1212 can use a partitioned power supply chip to realize multi-channel power supply and power management functions.

[0070] The primary and secondary power supply devices used in the multiple power supply circuits 121 can be selected according to the usage requirements. For example, the primary power supply devices in different power supply circuits can be the same or different, and the secondary power supply devices in different power supply circuits can be the same or different, etc.

[0071] Setting up a two-stage series-connected power supply device can improve the redundancy design of the circuit, simplify the circuit design, and reduce the design cost of the circuit.

[0072] According to some embodiments of this application, each primary power supply device 1211 is connected to each secondary power supply device 1212.

[0073] like Figure 3 As shown, for each power supply circuit group, each primary power supply device 1211 is connected to all secondary power supply devices 1212 in that group of power supply circuits. For any primary power supply device 1211, its output electrical energy will be transmitted to all secondary power supply devices 1212 in that group of power supply circuits.

[0074] exist Figure 3 In the example shown, if a fault exists in the battery management system 100, the following may occur:

[0075] The first fault mode: One of the multiple power supplies 110 malfunctions and cannot output power normally. Figure 3 Taking the failure of the upper power supply 110 as an example, the lower power supply 110 can still output power normally. The power output by the lower power supply 110 is transmitted to the primary power supply device 1211 connected to it, and further transmitted to the two secondary power supply devices 1212 below. Since the two secondary power supply devices 1212 are respectively connected to the two loads 130, the power can be transmitted to the two loads 130, so that both loads 130 can work normally.

[0076] The second fault mode: A primary power supply unit 1211 malfunctions and cannot transmit power normally. Figure 3 Taking a failure of the upper primary power supply device 1211 as an example, the lower primary power supply device 1211 can still transmit power normally. The power output from the power supply 110 connected to the lower primary power supply device 1211 is transmitted to the two secondary power supply devices 1212 connected to the primary power supply device 1211. Since the two secondary power supply devices 1212 are respectively connected to two loads 130, power can be transmitted to both loads 130, enabling both loads 130 to operate normally.

[0077] The third fault mode: A fault exists in a secondary power supply unit 1212, preventing normal power transmission. Figure 3 Taking the failure of the uppermost secondary power supply device 1212 as an example, the secondary power supply device 1212 in the lower power supply circuit can still transmit power normally. Since the two secondary power supply devices 1212 in this power supply circuit are connected to the two loads 130 respectively, power can be transmitted to the two loads 130, so that both loads 130 can work normally.

[0078] By configuring each primary power supply device in each power supply circuit to be connected to all secondary power supply devices in that power supply circuit, the redundancy design of the circuit can be improved. When any primary or secondary power supply device in the power supply circuit is working normally, the power supply circuit can be used to transmit power to the load, thereby improving the reliability of the power supply system.

[0079] According to some embodiments of this application, reference is made to Figure 4 At least one primary power supply device 1211 in any one of the multiple power supply circuits 121 is connected to each secondary power supply device 1212 in each of the multiple power supply circuits 121.

[0080] For the primary power supply unit 1211, taking its installation in eVTOL as an example, it is often subject to more severe interference, leading to faults such as abnormal restarts. Therefore, the redundancy design of the circuit can be further improved. For example... Figure 4 As shown, each primary power supply device 1211 in each power supply circuit can be connected not only to all secondary power supply devices 1212 in that power supply circuit, but also to all other secondary power supply devices 1212. In this case, the electrical energy output by any primary power supply device 1211 will be transmitted to all secondary power supply devices 1212.

[0081] exist Figure 4 In the example shown, components such as diodes can also be placed between each primary power supply device 1211 and secondary power supply device 1212 to improve power transmission quality and suppress interference signals.

[0082] exist Figure 4 In the example shown, if a fault exists in the battery management system 100, the following may occur:

[0083] The first fault mode: One of the multiple power supplies 110 malfunctions and cannot output power normally. Figure 4 Taking the failure of the upper power supply 110 as an example, the lower power supply 110 can still output power normally. The power output by the lower power supply 110 is transmitted to the primary power supply device 1211 connected to it, and further transmitted to all secondary power supply devices 1212. Since the secondary power supply devices 1212 are connected to two loads 130 respectively, power can be transmitted to both loads 130, enabling both loads 130 to operate normally.

[0084] The second fault mode: A primary power supply unit 1211 malfunctions and cannot transmit power normally. Figure 4Taking a failure of the upper primary power supply unit 1211 as an example, the lower primary power supply unit 1211 can still transmit power normally. The power output from the power supply 110 connected to the lower primary power supply unit 1211 is transmitted to all secondary power supply units 1212. Since the secondary power supply units 1212 are connected to two loads 130 respectively, power can be transmitted to both loads 130, enabling both loads 130 to operate normally.

[0085] The third fault mode: A fault exists in a secondary power supply unit 1212, preventing normal power transmission. Figure 4 Taking the failure of the uppermost secondary power supply device 1212 as an example, the secondary power supply device 1212 in the lower power supply circuit can still transmit power normally. Since the two secondary power supply devices 1212 in this power supply circuit are connected to the two loads 130 respectively, power can be transmitted to the two loads 130, so that both loads 130 can work normally.

[0086] Setting each primary power supply device to be connected to all secondary power supply devices can improve the redundancy design of the circuit. When any primary or secondary power supply device in the power supply circuit is working normally, power can be transmitted to the load, thus improving the reliability of the power supply system.

[0087] According to some embodiments of this application, the secondary power supply device 1212 corresponds one-to-one with the load 130. Each secondary power supply device 1212 is connected between at least one primary power supply device 1211 and the corresponding load 130.

[0088] like Figure 3 and Figure 4 As shown, for each power supply circuit, the number of secondary power supply devices 1212 is equal to the number of loads 130. Each secondary power supply device 1212 is connected to one load 130. The electrical energy output by the primary power supply device 1211 in this power supply circuit can be transmitted to the corresponding load 130 via different secondary power supply devices 1212. Simultaneously, for each load 130, there is a corresponding secondary power supply device 1212 connected to it in each power supply circuit. Therefore, as long as there is a normally functioning secondary power supply device 1212, electrical energy can be transmitted to that load 130, thus supplying power to that load 130.

[0089] Since each load 130 is connected to a corresponding secondary power supply device 1212 in each power supply circuit, it can receive electrical energy from the two power supplies 110 through the corresponding power supply device. Therefore, the power consumption borne by each power supply 110 and each power supply circuit can be reduced, effectively lowering the probability of failure.

[0090] In each power supply circuit, the secondary power supply device and the load are set to correspond one-to-one. Power can be transmitted to the corresponding load through the secondary power supply device, thus improving the redundancy design of the circuit.

[0091] According to some embodiments of this application, each of the multiple power supply circuits 121 includes at least one different primary power supply device 1211.

[0092] For the primary power supply device 1211 used in different groups of power supply circuits, different power supply devices can be used respectively, such as power supply devices of different models and performance. Figure 3 and Figure 4 The power supply circuit 120 shown can have different power supply devices, such as the upper and lower primary power supply devices 1211. In the event of interference, the risk of simultaneous failures or other malfunctions in multiple power supply circuits is lower because each power supply circuit uses a different primary power supply device 1211.

[0093] Using different primary power supply units in different groups can reduce the risk of all primary power supply units failing and improve the reliability of the power supply system.

[0094] According to some embodiments of this application, each of the multiple power supply circuits 121 includes at least one different secondary power supply device 1212.

[0095] For the secondary power supply device 1212 used in different groups of power supply circuits, different power supply devices can be used respectively, such as power supply devices of different models and performance. Figure 3 and Figure 4 The power supply circuit 120 shown can have two different secondary power supply devices 1212 used in the upper power supply circuit and two different secondary power supply devices 1212 used in the lower power supply circuit. In the event of interference, the risk of simultaneous failure of multiple power supply circuits is lower because the secondary power supply devices 1212 used in each power supply circuit are different.

[0096] Using different secondary power supply units in different groups can reduce the risk of all secondary power supply units failing and improve the reliability of the power supply system.

[0097] According to some embodiments of this application, reference is made to Figure 5 Each of the multiple power supply circuits 121 is connected to each power source 110.

[0098] Since power supply 110 and / or the path between power supply 110 and the power supply device may also fail, the redundancy design of the circuit can be further improved. For example... Figure 5 As shown, each power supply circuit is connected to all power sources 110; for example, each primary power supply device 1211 is connected to all power sources 110. In this case, the electrical energy output from each power source 110 can be transmitted to the load 130 through this power supply circuit.

[0099] exist Figure 5 In the example shown, components such as diodes can also be provided between each power supply 110 and each power supply circuit (e.g., each primary power supply device 1211) to improve power transmission quality and suppress interference signals.

[0100] exist Figure 5 In the example shown, if a fault exists in the battery management system 100, the following may occur:

[0101] The first fault mode: One of the multiple power supplies 110 malfunctions and cannot output power normally. Figure 5 Taking the failure of the upper power supply 110 as an example, the lower power supply 110 can still output power normally. The power output by the lower power supply 110 is transmitted to all primary power supply devices 1211, and further transmitted to all secondary power supply devices 1212. Since the secondary power supply devices 1212 are connected to two loads 130 respectively, power can be transmitted to both loads 130, enabling both loads 130 to operate normally.

[0102] The second fault mode: A primary power supply unit 1211 malfunctions and cannot transmit power normally. Figure 5 Taking a failure of the upper primary power supply unit 1211 as an example, the lower primary power supply unit 1211 can still transmit power normally. The power output from both power supplies 110 can be transmitted to all secondary power supply units 1212 through the lower primary power supply unit 1211. Since the secondary power supply units 1212 are connected to two loads 130 respectively, power can be transmitted to both loads 130, enabling both loads 130 to operate normally.

[0103] The third fault mode: A fault exists in a secondary power supply unit 1212, preventing normal power transmission. Figure 5Taking the failure of the uppermost secondary power supply device 1212 as an example, the secondary power supply device 1212 in the lower power supply circuit can still transmit power normally. Since the two secondary power supply devices 1212 in this power supply circuit are connected to the two loads 130 respectively, power can be transmitted to the two loads 130, so that both loads 130 can work normally.

[0104] By setting each power supply circuit to be connected to all power sources, the electrical energy output from all power sources can be transferred to the load connected to that power supply circuit. When there is a power source that can supply power normally among the multiple power sources, the electrical energy can be transferred to the load, thus improving the reliability of the power supply system.

[0105] According to some embodiments of this application, the power supply circuit 120 is disposed in the battery management system.

[0106] In the embodiments of this application, a Battery Management System (BMS) can be used to monitor, control, and manage the battery system in an electrical device. For the electrical device, the BMS acts as the brain of the battery system, responsible for driving power control, recharge control, and battery system health management. The power supply circuit 120 can be housed within the BMS. In some embodiments, the load 130 may include a load within the BMS.

[0107] By placing the power supply circuit within the battery management system, the battery management system can control the power supply process, thereby improving the reliability of the power supply process.

[0108] According to some embodiments of this application, the plurality of power sources 110 include power supply batteries and / or generators.

[0109] Taking eVTOL as an example, multiple power sources 110 can be included, such as power supply batteries or power output from generators. In the embodiments of this application, the power supply battery is also referred to as a low-voltage auxiliary battery, low-voltage control battery, etc., and its output voltage is relatively low, generally between 12V and 48V. It is mainly used for starting electrical devices, powering lights, audio and other loads, and controlling the power battery device. The power supply battery can be in the form of lead-acid batteries, etc.

[0110] In some embodiments, the multiple power supplies 110 can be designed to use different power supplies as much as possible, thereby improving the redundancy design of the circuit.

[0111] Using different power supplies can reduce the risk of all power supplies failing simultaneously and reduce the possibility of power supply anomalies.

[0112] Based on the same technical concept, embodiments of this application provide an electrical device. The electrical device includes the battery management system 100 in the above embodiments.

[0113] The description of the electrical device is as described above. Its embodiments can be referred to the embodiments of the battery management system 100, and the repeated parts will not be described again.

[0114] A specific embodiment of this application is described below. It should be understood that this specific embodiment is described for illustrative purposes only and should not be construed as limiting the scope of this application.

[0115] like Figures 3 to 5 As shown, the battery management system 100 includes multiple power sources 110 and a power circuit 120. The power circuit 120 is connected between the multiple power sources 110 and at least one load 130. Multiple sets of power supply circuits 121 are provided in the power circuit 120. The number of sets of power supply circuits is equal to the number of power sources 110, and each power source 110 is connected to a set of power supply circuits.

[0116] Each power supply circuit includes multiple power supply units. Figures 3 to 5 In the example shown, each power supply circuit includes two levels of power supply units: at least one primary power supply device 1211 in the first level and at least one secondary power supply device 1212 in the second level. The primary power supply device 1211 is connected to a corresponding power source 110. The secondary power supply device 1212 is connected to a corresponding load 130. The number of secondary power supply devices 1212 in each power supply circuit is equal to the number of loads 130, and each secondary power supply device 1212 is connected to one load 130.

[0117] like Figure 3 As shown, for each power supply circuit group, each primary power supply device 1211 is connected to all secondary power supply devices 1212 in that power supply circuit group. For example... Figure 4 and Figure 5 As shown, each primary power supply unit 1211 is further connected to all secondary power supply units 1212. For example... Figure 5 As shown, each power supply circuit is configured to be connected to all power supplies 110.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not 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. These 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, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery management system, characterized in that, include: Multiple power sources are configured to output electrical energy to at least one load; as well as A power supply circuit is connected between the plurality of power sources and the at least one load. The power supply circuit includes multiple sets of power supply circuits, each set of power supply circuits being configured to transmit electrical energy output from at least one of the plurality of power sources to the at least one load.

2. The battery management system according to claim 1, characterized in that, The multiple power supply circuits correspond one-to-one with the multiple power sources, and each of the multiple power supply circuits is connected between the corresponding power source and the at least one load.

3. The battery management system according to claim 1, characterized in that, Each of the multiple power supply circuits is connected to each of the loads.

4. The battery management system according to any one of claims 1-3, characterized in that, Each of the multiple power supply circuits includes multiple power supply units, and each power supply unit includes at least one power supply device.

5. The battery management system according to claim 4, characterized in that, The multi-level power supply unit includes: At least one primary power supply device is connected to at least one of the plurality of power supplies; and At least one secondary power supply device is connected between the at least one primary power supply device and the at least one load.

6. The battery management system according to claim 5, characterized in that, Each of the primary power supply devices is connected to each of the secondary power supply devices.

7. The battery management system according to claim 5, characterized in that, The at least one primary power supply device in any one of the multiple power supply circuits is connected to each of the secondary power supply devices in each of the multiple power supply circuits.

8. The battery management system according to any one of claims 5-7, characterized in that, Each secondary power supply device corresponds to one of the loads, and each secondary power supply device is connected between the at least one primary power supply device and the corresponding load.

9. The battery management system according to any one of claims 5-7, characterized in that, Each of the multiple power supply circuits includes at least one different primary power supply device.

10. The battery management system according to any one of claims 5-7, characterized in that, Each of the multiple power supply circuits includes at least one different secondary power supply device.

11. The battery management system according to any one of claims 1-3 and 5-7, characterized in that, Each of the multiple power supply circuits is connected to each of the power sources.

12. The battery management system according to any one of claims 1-3 and 5-7, characterized in that, The power supply circuit is located in the battery management system.

13. The battery management system according to any one of claims 1-3 and 5-7, characterized in that, The plurality of power sources include power batteries and / or generators.

14. An electrical appliance, characterized in that, include: The battery management system as described in any one of claims 1-13.

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