Power battery system, battery control method, device, equipment and storage medium

Abstract

The present application discloses a power battery system, a battery control method, a device, an equipment and a storage medium. The power battery system includes: a power supply module, including at least two battery packs; a drive module, connected to the power supply module, for converting the electrical energy provided by the power supply module into mechanical energy; a fault-tolerant module, arranged between the power supply module and the drive module, for controlling the power supply module to use a battery pack that has not failed to supply power when some battery packs fail. The present application can disconnect the faulty battery in time when some batteries fail, and use the remaining batteries that have not failed to supply power.

Description

Technical Field

[0001] The present application belongs to the technical field of power batteries, and specifically relates to a power battery system, a battery control method, a device, a equipment and a storage medium. Background Art

[0002] At present, electric devices such as electric vehicles and electric aircraft usually have power batteries and motors. The power battery serves as a power supply module to power a drive module (usually including a motor and an inverter). The drive module converts electrical energy into mechanical energy to drive the electric device to operate.

[0003] Among them, power batteries, as a power source, usually require emergency parking and return of the battery to the factory for inspection to ensure driving safety when encountering unexpected failures during daily use, which causes great inconvenience to car owners. Summary of the invention

[0004] In view of the above problems, the present application proposes a power battery system, a battery control method, a device, an equipment and a storage medium, which can disconnect the faulty batteries in time when some batteries fail and use the remaining non-faulty batteries for power supply.

[0005] In a first aspect, the present application provides a power battery system, comprising:

[0006] A power supply module, comprising at least two battery packs;

[0007] A driving module, connected to the power supply module, and configured to convert the electrical energy provided by the power supply module into mechanical energy;

[0008] The fault-tolerant module is arranged between the power supply module and the driving module, and is used to control the power supply module to use the battery packs that have not failed to supply power when some battery packs fail.

[0009] In the embodiment of the first aspect, by setting up a fault-tolerant module, when some batteries fail, the connection between the faulty battery pack and the drive module can be disconnected in time, so that the power supply module continues to supply power to the drive module using a battery pack that has not failed. The safe use of electrical equipment can still be achieved without emergency parking and waiting for the battery to be returned to the factory for inspection before use, thereby greatly improving the user's power consumption experience.

[0010] In some embodiments, the at least two battery packs are connected in series; when some of the battery packs fail, the fault-tolerant module controls the disconnection between the failed battery pack and the drive module and the battery pack that has not failed, and controls the connection between the battery pack that has not failed and the drive module.

[0011] When the battery packs are connected in series, if some of the battery packs fail, in order to prevent the failed battery packs from interfering with the battery packs that are not failed, it is necessary not only to disconnect the connection between the failed battery pack and the drive module, but also to disconnect the connection between the failed battery pack and the battery packs that are not failed. And keep the connection between the battery packs that are not failed and the drive module, so that the battery packs that are not failed can supply power to the drive module.

[0012] In some embodiments, the power supply module includes a first battery group and a second battery group connected in series; the fault-tolerant module includes a first control circuit, a second control circuit and a third control circuit, the first control circuit is used to control the on-off between the first battery group and the driving module; the second control circuit is used to control the on-off between the second battery group and the driving module; the third control circuit is used to control the on-off between the first battery group and the second battery group.

[0013] This embodiment sets three control circuits for the first battery pack and the second battery pack connected in series, which are respectively used to control the connection and disconnection between the first battery pack and the drive module, the connection and disconnection between the second battery pack and the drive module, and the connection and disconnection between the two battery packs. In this way, when one of the battery packs fails, the three control circuits can be used to control the disconnection between the failed battery pack and the drive module, the disconnection between the two battery packs, and the connection between the battery pack that has not failed and the drive module, so that the power supply module only uses the battery pack that has not failed to fail. In addition, the three control circuits have clear division of labor, which helps to control the first battery pack and the second battery pack separately, and also facilitates subsequent maintenance and fault detection.

[0014] In some embodiments, the first control circuit includes a first switch, which is arranged between the first battery pack and the driving module; the negative pole of the first battery pack is connected to the positive pole of the second battery pack, one end of the first switch is connected to the negative pole of the first battery pack, and the other end is co-linearly connected to the negative pole of the second battery pack and the first end of the driving module.

[0015] In this way, by connecting one end of the first switch to the negative electrode of the first battery pack, and connecting the other end of the first switch to the negative electrode of the second battery pack and the first end of the driving module in a collinear manner, the first switch is connected in series with the first battery pack and in parallel with the second battery pack. By turning on and off the first switch, the on and off between the first battery pack and the driving module can be realized, and the control logic is simple and the operation is convenient. And because the first switch is connected in parallel with the second battery pack, it will not affect the on and off between the second battery pack and the driving module, and the first switch can realize independent control of the first battery pack, which is more conducive to improving the safety and reliability of the overall power battery system.

[0016] In some embodiments, the second control circuit includes a second switch, which is arranged between the second battery pack and the driving module; the negative pole of the first battery pack is connected to the positive pole of the second battery pack, one end of the second switch is connected to the positive pole of the first battery, and the other end is co-linearly connected to the positive pole of the second battery pack and the second end of the driving module.

[0017] In this way, by setting a second switch, and connecting one end of the second switch to the positive electrode of the second battery pack, and the other end to the positive electrode of the first battery pack and the second end of the driving module in a collinear manner, the second switch is connected in series with the second battery pack and in parallel with the first battery pack. By turning on and off the second switch, the second battery pack and the driving module can be turned on and off, and the control logic is simple and the operation is convenient. And because the second switch is connected in parallel with the first battery pack, it will not affect the turning on and off between the first battery pack and the driving module, and the second switch can realize independent control of the second battery pack, which is more conducive to improving the safety and reliability of the overall power battery system.

[0018] In some embodiments, the third control circuit includes a third switch, which is arranged between the first battery group and the second battery group; one end of the third switch is connected to the negative electrode of the first battery group, and the other end is connected to the positive electrode of the second battery group.

[0019] In this way, by setting a third switch between the first battery pack and the second battery pack, it is specifically used to control the on and off between the first battery pack and the second battery pack. It has a simple structure and is easy to operate. It can achieve independent control between the first battery pack and the second battery pack, and is more conducive to improving the safety and reliability of the overall power battery system.

[0020] In some embodiments, a voltage regulating module is also included, which is arranged between the power supply module and the drive module, and is used to increase the voltage provided to the drive module when a part of the battery pack of the power supply module fails, so as to meet the high voltage requirements of the whole vehicle and further improve driving safety.

[0021] In some embodiments, the voltage regulating module includes a voltage regulating circuit and an energy storage unit, and a discharge circuit is formed by controlling the power supply module, the voltage regulating circuit, and the energy storage unit to make the power supply module discharge to the energy storage unit; and the discharge circuit is controlled to be disconnected, and the power supply module and the energy storage unit are controlled to discharge to the driving module at the same time.

[0022] By setting a voltage regulating module including a voltage regulating circuit and an energy storage unit, this embodiment can control the power supply module, the voltage regulating circuit, and the energy storage unit to form a discharge circuit when a part of the battery pack fails, so that the power supply module discharges to the energy storage unit, and the energy storage unit can store energy. When the energy storage of the energy storage unit reaches a certain value (which can be set according to actual conditions, and this embodiment does not specifically limit this), the discharge circuit can be controlled to be disconnected (specifically, any element or switch on the circuit can be disconnected), and then the energy storage unit can supply power to the drive module together with the battery pack that has not failed, so as to compensate for the voltage provided to the drive module by the battery pack that has not failed, thereby increasing the voltage provided to the drive module.

[0023] In some embodiments, the voltage regulating circuit includes two-phase bridge arms, one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one phase bridge arm, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm.

[0024] When the discharge circuit is formed as described above, the upper bridge arm of one phase bridge arm and the lower bridge arm of the other phase bridge arm of the two-phase bridge arm of the voltage regulating circuit can be controlled to be turned on, so that the power supply module, the voltage regulating circuit, and the energy storage unit form a discharge circuit. After the energy storage is completed, when discharging to the drive module, the two upper bridge arms (or two lower bridge arms) of the two-phase bridge arm in the voltage regulating circuit can be controlled to be turned on, so that the current provided by the power supply module can be transmitted to the drive module through the voltage regulating circuit and the energy storage unit.

[0025] In some embodiments, the at least two battery packs are connected in parallel; when some of the battery packs fail, the fault-tolerant module controls the disconnection between the failed battery pack and the driving module, and controls the connection between the healthy battery pack and the driving module.

[0026] When the battery packs are connected in parallel, if some of the battery packs fail, the failed battery packs will not interfere with the battery packs that have not failed. It is only necessary to disconnect the connection between the failed battery pack and the drive module, and maintain conduction between the battery pack that has not failed and the drive module, so that the failed battery pack can no longer supply power to the drive module, while the battery pack that has not failed can supply power to the drive module.

[0027] In some embodiments, the power supply module includes a third battery group and a fourth battery group connected in parallel; the fault-tolerant module includes a fourth control circuit and a fifth control circuit, the fourth control circuit is used to control the on-off between the third battery group and the drive module; the fifth control circuit is used to control the on-off between the fourth battery group and the drive module.

[0028] This embodiment sets a fourth control circuit and a fifth control circuit for the third battery pack and the fourth battery pack in parallel, one of which is used to control the on-off between the third battery pack and the drive module, and the other is used to control the on-off between the fourth battery pack and the drive module. In this way, when one of the battery packs fails, the fourth control circuit and the fifth control circuit can be used to control the disconnection between the failed battery pack and the drive module, and the conduction between the battery pack that has not failed and the drive module, so that the power supply module only uses the battery pack that has not failed to fail. In addition, the fourth control circuit and the fifth control circuit have clear division of labor, which helps to control the third battery pack and the fourth battery pack separately, and also facilitates subsequent maintenance and fault detection.

[0029] In some embodiments, the fourth control circuit includes a fourth switch, which is arranged between the third battery pack and the driving module; one end of the fourth switch is connected to the positive electrode of the third battery pack, and the other end is co-linearly connected to the positive electrode of the fourth battery pack and the second end of the driving module.

[0030] In this way, by connecting one end of the fourth switch to the positive electrode of the third battery pack, and connecting the other end of the fourth switch to the positive electrode of the fourth battery pack and the second end of the drive module in a collinear manner, the fourth switch is connected in series with the third battery pack and in parallel with the fourth battery pack. By turning on and off the fourth switch, the on and off between the third battery pack and the drive module can be realized, and the control logic is simple and the operation is convenient. And because the fourth switch is connected in parallel with the fourth battery pack, it will not affect the on and off between the fourth battery pack and the drive module, and the fourth switch can realize independent control of the third battery pack, which is more conducive to improving the safety and reliability of the overall power battery system.

[0031] In some embodiments, the fifth control circuit includes a fifth switch, which is arranged between the fourth battery group and the driving module; one end of the fifth switch is connected to the positive electrode of the fourth battery group, and the other end is co-linearly connected to the positive electrode of the third battery group and the second end of the driving module.

[0032] In this way, by connecting one end of the fifth switch to the positive electrode of the fourth battery pack, and connecting the other end of the fifth switch to the positive electrode of the third battery pack and the second end of the drive module in a collinear manner, the fifth switch is connected in series with the fourth battery pack and in parallel with the third battery pack. By turning on and off the fifth switch, the on and off between the fourth battery pack and the drive module can be realized, and the control logic is simple and the operation is convenient. And because the fifth switch is connected in parallel with the third battery pack, it will not affect the on and off between the third battery pack and the drive module, and the fifth switch can realize independent control of the fourth battery pack, which is more conducive to improving the safety and reliability of the overall power battery system.

[0033] In some embodiments, the fault-tolerant module further includes a sixth switch, which is disposed between the power supply module and the drive module to control the on-off between at least one battery pack and the drive module, so as to realize redundant control of the fault-tolerant module and further improve the safety and reliability of the power battery system.

[0034] In some embodiments, the driving module includes an M-phase inverter bridge arm, an M-phase motor and a heating circuit, the M-phase inverter bridge arm and the heating circuit are connected in parallel with the power supply module, the windings of the M-phase motor are connected one-to-one with the bridge arms of the M-phase inverter bridge arm, and the neutral line of the M-phase motor is connected to the heating circuit. The driving module with a heating circuit can perform self-heating of the battery when the battery temperature is low to adapt to a lower external temperature.

[0035] In some embodiments, a pre-charging module is further included, and the pre-charging module is arranged between the power supply module and the drive module, and is used to enable the power battery system to provide a preset high voltage to the whole vehicle, so as to realize the high voltage process of the whole vehicle before providing running power to the whole vehicle.

[0036] In some embodiments, the pre-charge module includes a seventh switch, an eighth switch and a pre-charge resistor; the eighth switch and the pre-charge resistor are connected in series, and are both connected in parallel with the seventh switch.

[0037] When applying high voltage to the whole vehicle, the eighth switch and the pre-charging resistor can be controlled to be turned on first, so that a series loop is formed between the power supply module and the capacitor and between the eighth switch and the pre-charging resistor, and the capacitor can be charged until the difference between the first voltage of the seventh switch close to the battery side and the second voltage close to the motor side is less than the preset voltage difference. This process can be understood as a capacitor charging process, so that the capacitor has a certain capacity, which can improve the stability of the overall circuit. And the pre-charging resistor in the loop can prevent the loop from short-circuiting and damaging the capacitor. Then control the seventh switch to be turned on and the eighth switch to be turned off, so that the power battery system provides the vehicle with the preset high voltage, that is, the high voltage of the whole vehicle is completed.

[0038] In a second aspect, the present application provides a battery control method, which is applied to the power battery system according to the first aspect, and the method includes:

[0039] During the process of the power supply module supplying power to the drive module, determining whether there is a battery pack failure;

[0040] If yes, the fault-tolerant module controls the power supply module to use a battery pack that has not failed to supply power.

[0041] In some embodiments, at least two battery packs of the power supply module are connected in series;

[0042] The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes:

[0043] The fault-tolerant module is used to disconnect the faulty battery pack from the drive module and the battery pack that has not failed, and to connect the battery pack that has not failed to the drive module, so that the power supply module uses the battery pack that has not failed to supply power.

[0044] In some embodiments, the power supply module includes a first battery pack and a second battery pack connected in series; the fault-tolerant module includes a first control circuit, a second control circuit and a third control circuit;

[0045] The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes:

[0046] In the event of a failure of the first battery pack, the first control circuit controls the first battery pack to be disconnected from the driving module, the third control circuit controls the first battery pack to be disconnected from the second battery pack, and the second control circuit controls the second battery pack to be connected to the driving module, so that the power supply module uses the second battery pack for power supply;

[0047] In the event of a failure of the second battery pack, the second control circuit controls the second battery pack to be disconnected from the drive module, the third control circuit controls the second battery pack to be disconnected from the first battery pack, and the first control circuit controls the first battery pack to be connected to the drive module, so that the power supply module is powered by the first battery pack.

[0048] In some embodiments, the first control circuit includes a first switch, and the first switch is arranged between the first battery pack and the driving module;

[0049] The controlling the first battery pack and the driving module to be disconnected or connected by the first control circuit includes:

[0050] In the event of a failure of the first battery pack, the first switch is disconnected to control the first battery pack to be disconnected from the driving module;

[0051] In the event that the second battery pack fails, the first switch is closed to control conduction between the first battery pack and the driving module.

[0052] In some embodiments, the second control circuit includes a second switch, and the second switch is arranged between the second battery pack and the driving module;

[0053] The controlling the second battery pack to be disconnected or connected to the driving module by the second control circuit includes:

[0054] In the event of a failure of the second battery pack, the second switch is disconnected to control the second battery pack to be disconnected from the driving module;

[0055] In the event of a failure of the first battery pack, the second switch is closed to control conduction between the second battery pack and the driving module.

[0056] In some embodiments, the third control circuit includes a third switch, and the third switch is disposed between the first battery pack and the second battery pack;

[0057] Controlling the first battery pack and the second battery pack to be disconnected by the third control circuit includes:

[0058] In the event of a failure of the first battery pack or the second battery pack, the third switch is disconnected to control the disconnection between the first battery pack and the second battery pack.

[0059] In some embodiments, at least two battery packs of the power supply module are connected in parallel;

[0060] The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes:

[0061] The fault-tolerant module controls the disconnection between the faulty battery pack and the driving module, and controls the connection between the healthy battery pack and the driving module, so that the power supply module uses the healthy battery pack for power supply.

[0062] In some embodiments, the power supply module includes a third battery pack and a fourth battery pack connected in parallel;

[0063] The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes:

[0064] In the event of a failure of the third battery pack, the third battery pack is disconnected from the driving module by the fourth control circuit, and the fourth battery pack is connected to the driving module by the fifth control circuit, so that the power supply module uses the fourth battery pack for power supply;

[0065] In the event of a failure of the fourth battery pack, the fifth control circuit controls the disconnection between the fourth battery pack and the drive module, and the fourth control circuit controls the conduction between the third battery pack and the drive module, so that the power supply module uses the third battery pack for power supply.

[0066] In some embodiments, the fourth control circuit includes a fourth switch, and the fourth switch is disposed between the third battery pack and the driving module;

[0067] Controlling the disconnection or connection between the third battery pack and the driving module by the fourth control circuit includes:

[0068] In the event of a failure of the third battery pack, disconnecting the fourth switch to control the disconnection between the third battery pack and the driving module;

[0069] In the event that the fourth battery pack fails, the fourth switch is closed to control conduction between the third battery pack and the driving module.

[0070] In some embodiments, the fifth control circuit includes a fifth switch, and the fifth switch is disposed between the fourth battery pack and the driving module;

[0071] Controlling the disconnection or connection between the fourth battery pack and the driving module by the fifth control circuit includes:

[0072] In the event of a failure of the fourth battery pack, the fifth switch is disconnected to control the disconnection between the fourth battery pack and the driving module;

[0073] In the event that the third battery pack fails, the fifth switch is closed to control conduction between the fourth battery pack and the driving module.

[0074] In some embodiments, the fault-tolerant module further includes a sixth switch, which is disposed between the power supply module and the drive module to control the connection and disconnection between at least one battery pack and the drive module;

[0075] The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module also includes:

[0076] The sixth switch is turned off to control the disconnection between the battery pack with the fault and the driving module, so that the power supply module uses the battery pack without the fault to supply power.

[0077] In some embodiments, determining whether a battery pack failure occurs includes:

[0078] Collecting battery parameters of each battery cell in the power supply module, wherein the battery parameters include at least one of temperature, current, voltage, and power of the battery cell;

[0079] It is determined whether a battery pack failure occurs based on the battery parameters.

[0080] In some embodiments, determining whether a battery pack failure occurs according to the battery parameters includes:

[0081] Determine whether there is a battery cell whose battery parameters meet a preset fault condition;

[0082] If so, the battery pack to which the battery cells meeting the preset fault condition belong is determined as the faulty battery pack.

[0083] In some embodiments, the power battery system further includes a voltage regulating module, and the voltage regulating module is disposed between the power supply module and the drive module;

[0084] The battery control method further includes:

[0085] The voltage provided to the driving module is increased by the voltage regulating module.

[0086] In some embodiments, the voltage regulation module includes a voltage regulation circuit and an energy storage unit;

[0087] Increasing the voltage provided to the driving module by the voltage regulating module includes:

[0088] Controlling the power supply module, the voltage regulating circuit, and the energy storage unit to form a discharge circuit, so that the power supply module discharges to the energy storage unit;

[0089] The discharge circuit is controlled to be disconnected, and the power supply module and the energy storage unit are controlled to discharge to the drive module at the same time.

[0090] In some embodiments, the voltage regulating circuit includes two-phase bridge arms, one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one phase bridge arm, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm;

[0091] Controlling the power supply module, the voltage regulating circuit, and the energy storage unit to form a discharge circuit includes:

[0092] The upper bridge arm of one phase bridge arm and the lower bridge arm of the other phase bridge arm in the two-phase bridge arm are controlled to be turned on, so that the power supply module, the voltage regulating circuit and the energy storage unit form a discharge loop.

[0093] In a third aspect, the present application provides a battery control device, comprising:

[0094] A fault determination module, used to determine whether there is a battery pack fault during the process of the power supply module supplying power to the drive module;

[0095] The fault-tolerant control module is used to control the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module.

[0096] In a fourth aspect, the present application provides an electric device, comprising the power battery system of the first aspect of the claim, and the battery control device of the third aspect. .

[0097] In a fourth aspect, the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect above.

[0098] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, characterized in that the program is executed by a processor to implement the method described in the first aspect above.

[0099] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0101] Figure 1 A schematic structural diagram of a power battery system provided by an embodiment of the present application is shown;

[0102] Figure 2 A structural schematic diagram of a second power battery system provided in an embodiment of the present application (batteries connected in series) is shown;

[0103] Figure 3 A schematic diagram of the structure of a third power battery system provided in an embodiment of the present application (batteries connected in series) is shown;

[0104] Figure 4 A schematic structural diagram of a fourth power battery system provided in an embodiment of the present application (batteries connected in series) is shown;

[0105] Figure 5 A schematic structural diagram of a fifth power battery system provided in an embodiment of the present application is shown (a voltage regulating module is provided);

[0106] Figure 6 A structural schematic diagram of a sixth power battery system provided in an embodiment of the present application (batteries connected in parallel) is shown;

[0107] Figure 7 A structural schematic diagram of a seventh power battery system provided in an embodiment of the present application (batteries connected in parallel) is shown;

[0108] Figure 8 A structural schematic diagram of an eighth power battery system provided in an embodiment of the present application (batteries connected in parallel) is shown;

[0109] Fig. 9 A schematic diagram of the structure of a ninth power battery system provided in an embodiment of the present application is shown (the batteries are connected in series and have redundant switches);

[0110] Fig.10 A schematic diagram of the structure of a tenth power battery system provided in an embodiment of the present application is shown (the batteries are connected in series and have redundant switches);

[0111] Fig.11 A schematic diagram of the structure of an eleventh power battery system provided in an embodiment of the present application is shown (the batteries are connected in series and have redundant switches);

[0112] Fig.12 A schematic structural diagram of a twelfth power battery system provided in an embodiment of the present application is shown (the batteries are connected in parallel and have redundant switches);

[0113] Fig.13 A schematic diagram of the structure of a thirteenth power battery system provided in an embodiment of the present application is shown (the batteries are connected in parallel and have redundant switches);

[0114] Fig.14 A schematic flow chart of a battery control method provided in an embodiment of the present application is shown;

[0115] Fig.15 A schematic diagram of the structure of a battery control device provided in one embodiment of the present application is shown;

[0116] Fig.16 A schematic diagram of the structure of an electronic device provided by an embodiment of the present application is shown;

[0117] Fig.17 A schematic diagram of a storage medium provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0118] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0119] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0120] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0121] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0122] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0123] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0124] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0125] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0126] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields. In the fields of electric transportation supply, military equipment, aerospace and other fields, power batteries are usually used to provide power, specifically, the electric energy of the power battery is converted into mechanical energy through the motor, thereby driving the operation of electrical equipment.

[0127] The inventors of the present invention have noticed that power batteries may fail during daily use. For example, the battery temperature is too high, the battery pressure is too high, the battery is undervoltage, and the battery power is too low, etc. As a power source, once a power battery fails, it will have a great impact on the user's driving safety. In order to protect the personal safety of users, in the prior art, once a power battery failure is found, the system will automatically or prompt the user to emergency stop, and the user needs to return the battery to the factory for testing to ensure subsequent driving safety, but this has caused great inconvenience to the owner's travel.

[0128] However, the inventors have found that power batteries, especially those used in large-scale electrical equipment such as electric vehicles and electric aircraft, usually include multiple battery packs. When a battery fails, usually only part of the battery pack (or part of the battery cells) fails. If the connection between the failed battery pack and the drive module can be cut off when part of the battery pack fails, so that the power supply module only uses the battery pack that has not failed to supply power to the drive module, the electrical equipment can still be used safely without emergency parking and waiting for the battery to be returned to the factory for inspection before use.

[0129] Based on the above considerations, in order to solve the problem that when some batteries fail, emergency parking must be carried out and the batteries must be returned to the factory for inspection, causing great inconvenience to the car owner's travel, the inventor has designed a power battery system after in-depth research, including a power supply module, a drive module, and a fault-tolerant module arranged between the power supply module and the drive module. The fault-tolerant module can control the power supply module to use a battery pack that has not failed to supply power when some battery packs of the power supply module fail.

[0130] In this way, by setting up a fault-tolerant module, when some batteries fail, the connection between the faulty battery pack and the drive module can be disconnected in time, so that the power supply module continues to supply power to the drive module using the battery pack that has not failed. The safe use of electrical equipment can still be achieved without emergency parking and waiting for the battery to be returned to the factory for inspection before use, thereby greatly improving the user's power experience.

[0131] An embodiment of the present application also provides an electrical device using the power battery system. When the power battery system provided by the present application is used in the electrical device, when some battery packs of the power supply module fail, the power supply module is controlled to use the battery packs that have not failed to supply power, thereby achieving safe use of the electrical device.

[0132] The electrical equipment may be, but is not limited to, electric cars, ships, spacecraft, electric toys, electric tools, battery cars, etc. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecrafts, etc.

[0133] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a power battery system 200 provided in some embodiments of the present application. Figure 1 As shown, the power battery system 200 includes a power supply module 210, a drive module 220 and a fault-tolerant module 230, wherein the power supply module 210 includes at least two battery packs. The drive module 220 is connected to the power supply module 210 and is used to convert the electrical energy provided by the power supply module 210 into mechanical energy. The fault-tolerant module 230 is arranged between the power supply module 210 and the drive module 220 and is used to control the power supply module 210 to use the battery packs that have not failed to supply power when some battery packs fail.

[0134] The power supply module 210 may include multiple battery packs. When some of the battery packs fail, the remaining battery packs that have not failed can still supply power to the drive module 220. Specifically, the multiple battery packs can be connected in parallel or in series. The parallel connection can be understood as the two positive poles of the two battery packs are connected, and the two negative poles are also connected. The series connection can be understood as the positive pole of one of the two battery packs is connected to the negative pole of the other battery pack.

[0135] It is understandable that the present embodiment does not specifically limit the number and type of battery packs. For example, the battery may be a ternary power battery, a lithium iron phosphate battery, a lithium titanate battery, a lead-acid battery, etc. The number of battery packs is usually greater than or equal to 2 and can be set according to actual needs.

[0136] like Figure 2 As shown, the drive module 220 may include an inverter and a motor. The inverter is connected to the battery, and may include an M-phase inverter bridge arm, and the M-phase inverter bridge arm is connected in parallel with the power supply module 210. The motor may include a motor having M windings, and the M windings are respectively connected to the M-phase bridge arms of the bridge arm circuit in a one-to-one correspondence. The M phases may be, but are not limited to, three phases, four phases, five phases, six phases, twelve phases, etc.

[0137] The driving module 220 may further include a heating circuit, which is connected in parallel with the power supply module 210 and is used to form an alternating charging and discharging circuit with the power supply module 210 to heat the battery pack of the power supply module 210 .

[0138] like Figure 2 or Figure 3 As shown, the heating circuit can be connected to the neutral line of the M-phase motor and can include at least one upper bridge arm and one lower bridge arm. The upper bridge arm (or lower bridge arm) of the M-phase inverter bridge arm and the lower bridge arm (or upper bridge arm) of the heating circuit are turned on, so that the battery, inverter, heating circuit and motor form an alternating charging circuit and a discharging circuit, so as to realize self-heating of the battery by charging and discharging the battery pack.

[0139] The heating circuit may also include a two-phase bridge arm circuit and an energy storage unit arranged between the two-phase bridge arms, such as Figure 4 As shown, one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one phase bridge arm, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm. By turning on the upper bridge arm of one phase bridge arm and the lower bridge arm of the other phase bridge arm in the two-phase bridge arm, the battery, the two-phase bridge arm and the energy storage unit form an alternating charging circuit and a discharging circuit, so as to realize the self-heating of the battery by charging and discharging the battery pack.

[0140] The energy storage unit is usually an inductor element, and this embodiment does not specifically limit its specific structure and quantity.

[0141] The fault-tolerant module 230 may be an integral structure or may include multiple components that work independently. The present embodiment does not impose any specific limitation on its specific structure, as long as the connection between the battery pack that has a fault and the drive module 220 can be disconnected, and the connection between the battery pack that has not failed and the drive module 220 can be established.

[0142] By setting up the fault-tolerant module 230, this embodiment can promptly disconnect the connection between the faulty battery pack and the drive module 220 when some batteries fail, so that the power supply module 210 continues to supply power to the drive module 220 using the battery pack that has not failed. The safe use of electrical equipment can still be achieved without emergency parking and waiting for the batteries to be returned to the factory for inspection before use, thereby greatly improving the user's power experience.

[0143] In some embodiments, at least two battery packs are connected in series; when some battery packs fail, the fault-tolerant module 230 controls the disconnection between the failed battery pack and the drive module 220 and the battery pack that has not failed, and controls the connection between the battery pack that has not failed and the drive module 220.

[0144] When the battery packs are connected in series, if some of the battery packs fail, in order to prevent the failed battery packs from interfering with the battery packs that are not failed, it is necessary not only to disconnect the failed battery packs from the driving module 220, but also to disconnect the failed battery packs from the battery packs that are not failed. The battery packs that are not failed are kept connected to the driving module 220 so that the battery packs that are not failed can supply power to the driving module 220.

[0145] Specifically, the power supply module 210 may include a first battery pack B1 and a second battery pack B2 connected in series. The fault-tolerant module 230 includes a first control circuit, a second control circuit and a third control circuit, wherein the first control circuit is used to control the on-off between the first battery pack B1 and the driving module 220; the second control circuit is used to control the on-off between the second battery pack B2 and the driving module 220; and the third control circuit is used to control the on-off between the first battery pack B1 and the second battery pack B2.

[0146] In this embodiment, three control circuits are set for the first battery pack B1 and the second battery pack B2 connected in series, which are respectively used to control the connection and disconnection between the first battery pack B1 and the driving module 220, the connection and disconnection between the second battery pack B2 and the driving module 220, and the connection and disconnection between the two battery packs. In this way, when one of the battery packs fails, the three control circuits can be used to control the disconnection between the failed battery pack and the driving module 220, the disconnection between the two battery packs, and the connection between the battery pack that has not failed and the driving module 220, so that the power supply module 210 only uses the battery pack that has not failed to fail. In addition, the three control circuits have clear division of labor, which helps to control the first battery pack B1 and the second battery pack B2 separately, and also facilitates subsequent maintenance and fault detection.

[0147] It should be noted that this embodiment does not limit whether the three control circuits are connected to each other, as long as the above control function can be achieved.

[0148] like Figure 2-Figure 4 As shown, the first control circuit may include a first switch K1, which is disposed between the first battery pack B1 and the driving module 220. When the negative electrode of the first battery pack B1 is connected to the positive electrode of the second battery pack B2, one end of the first switch K1 is connected to the negative electrode of the first battery pack B1, and the other end is connected in line with the negative electrode of the second battery pack B2 and the first end of the driving module 220.

[0149] In this way, by connecting one end of the first switch K1 to the negative electrode of the first battery pack B1, and connecting the other end of the first switch K1 to the negative electrode of the second battery pack B2 and the first end of the driving module 220 in a collinear manner, the first switch K1 is connected in series with the first battery pack B1, and connected in parallel with the second battery pack B2. By turning on and off the first switch K1, the on and off between the first battery pack B1 and the driving module 220 can be realized, and the control logic is simple and the operation is convenient. And because the first switch K1 is connected in parallel with the second battery pack B2, it will not affect the on and off between the second battery pack B2 and the driving module 220, and the first switch K1 can realize the independent control of the first battery pack B1, which is more conducive to improving the safety and reliability of the overall power battery system 200.

[0150] The second control circuit includes a second switch K2, which is arranged between the second battery group B2 and the driving module 220; when the negative pole of the first battery group B1 is connected to the positive pole of the second battery group B2, one end of the second switch K2 is connected to the positive pole of the first battery, and the other end is connected in line with the positive pole of the second battery group B2 and the second end of the driving module 220.

[0151] Similar to the setting principle of the first switch K1, the second switch K2 is set, and one end of the second switch K2 is connected to the positive electrode of the second battery pack B2, and the other end is connected in line with the positive electrode of the first battery pack B1 and the second end of the driving module 220. The second switch K2 is connected in series with the second battery pack B2 and in parallel with the first battery pack B1. The on-off of the second switch K2 can realize the on-off between the second battery pack B2 and the driving module 220. The control logic is simple and the operation is convenient. And because the second switch K2 is connected in parallel with the first battery pack B1, it will not affect the on-off between the first battery pack B1 and the driving module 220, and the second switch K2 can realize the independent control of the second battery pack B2, which is more conducive to improving the safety and reliability of the overall power battery system 200.

[0152] The third control circuit includes a third switch K3, which is arranged between the first battery pack B1 and the second battery pack B2; one end of the third switch K3 is connected to the negative electrode of the first battery pack B1, and the other end is connected to the positive electrode of the second battery pack B2. In this way, by arranging the third switch K3 between the first battery pack B1 and the second battery pack B2, it is specifically used to control the on-off between the first battery pack B1 and the second battery pack B2, with a simple structure and convenient operation, and can realize independent control between the first battery pack B1 and the second battery pack B2, which is more conducive to improving the safety and reliability of the overall power battery system 200.

[0153] When the battery packs are connected in series, the remaining battery packs that have not failed are used for power supply. As the number of battery packs is reduced, the voltage provided by the power supply module 210 to the driving module 220 may be lower. Figure 5 As shown, the power battery system 200 provided in this embodiment is also provided with a voltage regulating module. The voltage regulating module is provided between the power supply module 210 and the drive module 220, and is used to increase the voltage provided to the drive module 220 when a part of the battery pack of the power supply module 210 fails, so as to meet the high voltage demand of the whole vehicle and further improve driving safety.

[0154] Among them, the voltage regulating module may include a voltage regulating circuit and an energy storage unit, and a discharge circuit is formed by controlling the power supply module 210, the voltage regulating circuit, and the energy storage unit to make the power supply module 210 discharge to the energy storage unit; and, the discharge circuit is controlled to be disconnected, and the power supply module 210 and the energy storage unit are controlled to discharge to the driving module 220 at the same time.

[0155] By setting a voltage regulating module including a voltage regulating circuit and an energy storage unit, this embodiment can control the power supply module 210, the voltage regulating circuit, and the energy storage unit to form a discharge circuit when a part of the battery pack fails, so that the power supply module 210 discharges to the energy storage unit, and the energy storage unit can store energy. When the energy storage of the energy storage unit reaches a certain value (which can be set according to actual conditions, and this embodiment does not specifically limit this), the discharge circuit can be controlled to be disconnected (specifically, any element or switch on the circuit can be disconnected), and then the energy storage unit can supply power to the drive module 220 together with the battery pack that has not failed, so as to compensate for the voltage provided to the drive module 220 by the battery pack that has not failed, thereby increasing the voltage provided to the drive module 220.

[0156] Specifically, the voltage regulation module can refer to Figure 4 The heating circuit shown, that is, the voltage regulating circuit may include two-phase bridge arms, one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one phase bridge arm, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm.

[0157] When the discharge circuit is formed as described above, the upper bridge arm of one phase bridge arm and the lower bridge arm of the other phase bridge arm of the two-phase bridge arm of the voltage regulating circuit can be controlled to be turned on, so that the power supply module 210, the voltage regulating circuit, and the energy storage unit form a discharge circuit. After the energy storage is completed, when discharging to the drive module 220, the two upper bridge arms (or two lower bridge arms) of the two-phase bridge arm in the voltage regulating circuit can be controlled to be turned on, so that the current provided by the power supply module 210 can be transmitted to the drive module 220 through the voltage regulating circuit and the energy storage unit.

[0158] It is understandable that the energy storage unit has limited storage capacity. After discharging for a period of time, energy needs to be stored again. After the energy storage is completed, it is discharged again, and this cycle is repeated.

[0159] In some embodiments, it is possible to directly Figure 4 The heating module shown is used as a voltage regulating module to simplify the overall structure and make the voltage regulating process more convenient. The energy storage process can refer to the discharge process of the battery during the heating process. Specifically, the energy storage of the energy storage unit and the size of the compensating driving voltage can be adjusted by controlling the conduction ratio of the voltage regulating module, so that when different numbers of battery packs fail, the power supply module 210 can still provide a relatively stable driving voltage.

[0160] It should be noted that, in this embodiment, only the boost function of the voltage regulating module is usually applied, but the module also has a voltage reducing function, and those skilled in the art can set it according to needs. For example, the energy storage unit and the motor form a loop, and the energy storage process may reduce the pressure of the driving module 220. In addition, the setting of the voltage regulating module is only a preferred implementation of this embodiment, and this embodiment is not limited to this, as long as the voltage provided to the driving module 220 can be increased.

[0161] In other embodiments, at least two battery packs are connected in parallel. When some battery packs fail, the fault-tolerant module 230 controls the failed battery pack to be disconnected from the driving module 220 and controls the battery pack that has not failed to be connected to the driving module 220.

[0162] When the battery packs are connected in parallel, if some of the battery packs fail, the failed battery packs will not interfere with the battery packs that have not failed. It is only necessary to disconnect the connection between the failed battery pack and the drive module 220, and maintain conduction between the battery packs that have not failed and the drive module 220, so that the failed battery pack can no longer supply power to the drive module 220, while the battery packs that have not failed can supply power to the drive module 220.

[0163] like Figure 6-Figure 8 As shown, the power supply module 210 may include a third battery pack B3 and a fourth battery pack B4 connected in parallel. The fault-tolerant module 230 may include a fourth control circuit and a fifth control circuit, wherein the fourth control circuit is used to control the connection and disconnection between the third battery pack B3 and the driving module 220; and the fifth control circuit is used to control the connection and disconnection between the fourth battery pack B4 and the driving module 220.

[0164] In this embodiment, a fourth control circuit and a fifth control circuit are respectively provided for the third battery pack B3 and the fourth battery pack B4 connected in parallel, one of which is used to control the on-off between the third battery pack B3 and the driving module 220, and the other is used to control the on-off between the fourth battery pack B4 and the driving module 220. In this way, when one of the battery packs fails, the fourth control circuit and the fifth control circuit can be used to control the disconnection between the failed battery pack and the driving module 220, and the conduction between the battery pack that has not failed and the driving module 220, so that the power supply module 210 only uses the battery pack that has not failed to perform the fault. In addition, the fourth control circuit and the fifth control circuit have clear division of labor, which helps to control the third battery pack B3 and the fourth battery pack B4 separately, and also facilitates subsequent maintenance and fault detection.

[0165] like Figure 6-Figure 8 As shown, the fourth control circuit may include a fourth switch K4, which is disposed between the third battery pack B3 and the driving module 220. One end of the fourth switch K4 is connected to the positive electrode of the third battery pack B3, and the other end is connected in line with the positive electrode of the fourth battery pack B4 and the second end of the driving module 220.

[0166] In this way, by connecting one end of the fourth switch K4 to the positive electrode of the third battery pack B3, and connecting the other end of the fourth switch K4 to the positive electrode of the fourth battery pack B4 and the second end of the driving module 220 in a collinear manner, the fourth switch K4 is connected in series with the third battery pack B3, and in parallel with the fourth battery pack B4. By turning on and off the fourth switch K4, the on and off between the third battery pack B3 and the driving module 220 can be realized, and the control logic is simple and the operation is convenient. And because the fourth switch K4 is connected in parallel with the fourth battery pack B4, it will not affect the on and off between the fourth battery pack B4 and the driving module 220, and the fourth switch K4 can realize the independent control of the third battery pack B3, which is more conducive to improving the safety and reliability of the overall power battery system 200.

[0167] The fifth control circuit includes a fifth switch K5, which is arranged between the fourth battery pack B4 and the driving module 220; one end of the fifth switch K5 is connected to the positive electrode of the fourth battery pack B4, and the other end is connected in line with the positive electrode of the third battery pack B3 and the second end of the driving module 220.

[0168] Similar to the design of the fourth switch K4, by connecting one end of the fifth switch K5 to the positive electrode of the fourth battery pack B4, and connecting the other end of the fifth switch K5 to the positive electrode of the third battery pack B3 and the second end of the driving module 220 in a collinear manner. The fifth switch K5 is connected in series with the fourth battery pack B4 and in parallel with the third battery pack B3. By turning on and off the fifth switch K5, the on and off between the fourth battery pack B4 and the driving module 220 can be realized, and the control logic is simple and the operation is convenient. And because the fifth switch K5 is connected in parallel with the third battery pack B3, it will not affect the on and off between the third battery pack B3 and the driving module 220, and the fifth switch K5 can realize the independent control of the fourth battery pack B4, which is more conducive to improving the safety and reliability of the overall power battery system 200.

[0169] It is understandable that when the battery packs of the power supply module 210 are connected in parallel, even if some of the battery packs fail, it will not affect the voltage provided by the power supply module 210 to the driving module 220, so there is no need to set up a voltage regulating module. Figure 8 The heating module shown can be used only for the battery self-heating process and energy transfer of the third battery group B3.

[0170] In other embodiments, the fault-tolerant module 230 may also include a sixth switch, which is arranged between the power supply module 210 and the drive module 220 to control the on-off between at least one battery pack and the drive module 220 to achieve redundant control of the fault-tolerant module 230 and further improve the safety and reliability of the power battery system 200.

[0171] The sixth switch may include but is not limited to: Figure 9-13 As shown in the redundant switches K61, K62, K63 and K64.

[0172] For the first battery group B1 and the second battery group B2 connected in series, Fig. 9 As shown, the positive poles of the two battery packs are connected to the driving module 220 through different wires, and a redundant switch is respectively set between each battery pack and the driving module 220, that is, a switch K61 is set on the connection line between the first battery pack B1 and the driving module 220, and a switch K62 is set on the connection line between the second battery pack B2 and the driving module 220. And the first battery pack B1 and the second battery pack B2 can be redundantly controlled by the on-off of the switch K61 and the switch K62. When the first switch K1 or the second switch K2 fails, the on-off between the first battery pack B1 and the driving module 220 can be controlled by the switch K61, and the on-off between the second battery pack B2 and the driving module 220 can be controlled by the switch K62. To ensure that when the first battery pack B1 (or the second battery pack B2) fails, it can be disconnected from the driving module 220, and the conduction between the second battery pack B2 (or the first battery pack B1) and the driving module 220 is maintained.

[0173] When the first battery pack B1 and the second battery pack B2 are operating normally, the first switch K1 and the second switch K2 can be controlled to be disconnected, and the third switch K3, the switch K61 and the switch K62 can be controlled to be closed, so that the first battery pack B1 and the second battery pack B2 are connected in series to supply power to the driving module 220. During operation, if the first battery pack B1 fails, the third switch K3 is disconnected, at least one of the first switch K1 and the switch K61 is disconnected, so that the first battery pack B1 is disconnected from the driving module 220. The second switch K2 and the switch K62 are closed, so that the second battery pack B2 is connected to the driving module 220. If the second battery pack B2 fails, the third switch K3 is disconnected, at least one of the second switch K2 and the switch K62 is disconnected, so that the second battery pack B2 is disconnected from the driving module 220. The first switch K1 and the switch K61 are closed, so that the first battery pack B1 is connected to the driving module 220.

[0174] For the first battery group B1 and the second battery group B2 connected in series, the Fig.10 As shown, the positive poles of the two battery packs are connected to the drive module 220 through the same wire, and a redundant switch K61 can be set on the wire. Then the redundant switch K61 can simultaneously control the on and off between the first battery pack B1 and the second battery pack B2 and the drive module 220. During the operation of the power battery system 200, the redundant switch K61 can be used as a normally closed switch. When the first switch K1 or the second switch K2 fails, it can be used as an emergency switch to disconnect the entire circuit. If the first battery pack B1 or the second battery pack B2 fails, the same switches connected in series are controlled. The specific control process can be referred to Fig. 9 The control process of the structure shown will not be described in detail here.

[0175] For the first battery group B1 and the second battery group B2 connected in series, it is also possible to Fig.11 As shown, the positive poles of the two battery packs are connected to the driving module 220 through different wires, and the two wires are connected or disconnected through a switch K21, and a switch K22 is set between the second battery pack B2 and the driving module 220, and a redundant switch K61 is set on the connection line between the first battery pack B1 and the driving module 220.

[0176] When the first battery pack B1 and the second battery pack B2 are operating normally, the first switch K1 can be controlled to be disconnected, the switch K61 can be controlled to be disconnected, and the third switch K3, the switch K21, and the switch K22 can be controlled to be closed, so that the first battery pack B1 and the second battery pack B2 are connected in series to jointly supply power to the driving module 220. Alternatively, the first switch K1, the switch K21, and the switch K22 can be controlled to be disconnected, and the third switch K3 and the switch K61 can be controlled to be closed, so that the first battery pack B1 and the second battery pack B2 are connected in series to jointly supply power to the driving module 220.

[0177] During operation, if the first battery pack B1 fails, the third switch K3 and switch K21 are disconnected, and at least one of the first switch K1 and switch K61 is disconnected, so that the first battery pack B1 is disconnected from the driving module 220. And the switch K22 is closed to connect the second battery pack B2 to the driving module 220. Or the switch K21 and switch K61 are closed to connect the second battery pack B2 to the driving module 220 (transmitted through the energy storage unit). If the second battery pack B2 fails, the third switch K3, switch K21 and switch K22 are all disconnected, so that the second battery pack B2 is disconnected from the driving module 220. And the first switch K1 and switch K61 are both closed to connect the first battery pack B1 to the driving module 220.

[0178] For the third battery pack B3 and the fourth battery pack B4 connected in parallel, Fig.12 or Fig.13 As shown ( Fig.12 When both battery packs are operating normally, the two upper bridge arms and the two lower bridge arms of the heating module are disconnected, and the third battery pack B3 is transmitted to the driving module 220 through the line where the switch K63 is located) to set a redundant switch. Fig.12 FIG. 4 shows a configuration mode of the redundant switch K63 of the third battery pack B3. Fig.13 FIG. 4 shows a configuration of the redundant switch K64 of the fourth battery pack B4 .

[0179] The switch K63 and the fourth switch K4 may jointly control the connection between the third battery pack B3 and the driving module 220. The switch 64 and the fifth switch K5 may jointly control the connection between the fourth battery pack B4 and the driving module 220. When the third battery pack B3 fails, the switch K63 may be disconnected from any one of the fourth switches K4, and the switch K64 and the fifth switch K5 may be closed. When the fourth battery pack B4 fails, the switch K64 may be disconnected from any one of the fifth switches K5, and the switch K63 and the fourth switch K4 may be closed.

[0180] It should be noted that the configuration of the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the fifth switch K5 and the sixth switch are only several implementations listed in this embodiment, and this embodiment is not limited thereto, as long as the above control function of the two battery packs can be achieved. In addition, this embodiment does not limit the connection between the negative electrode of the first battery pack B1 and the positive electrode of the second battery pack B2, and the positive electrode of the first battery pack B1 and the negative electrode of the second battery pack B2 can also be connected.

[0181] In other embodiments, the power battery system 200 further includes a pre-charging module, which is disposed between the power supply module 210 and the drive module 220, and is used to enable the power battery system 200 to provide a preset high voltage to the vehicle, so as to realize the high voltage process of the vehicle before providing running power to the vehicle.

[0182] The voltage value of the pre-charged high voltage may be slightly lower than the voltage value when the vehicle is running, and may be specifically set according to actual conditions, and this embodiment does not make any specific limitation thereto.

[0183] like Figure 9-13 The pre-charging module may include a seventh switch K7, an eighth switch K8 and a pre-charging resistor R1; the eighth switch K8 and the pre-charging resistor R1 are connected in series, and are both connected in parallel with the seventh switch K7.

[0184] When applying high voltage to the whole vehicle, the eighth switch K8 and the pre-charging resistor R1 can be controlled to be turned on first, so that a series loop is formed between the power supply module 210 and the capacitor and the eighth switch K8 and the pre-charging resistor R1, and the capacitor can be charged until the difference between the first voltage of the seventh switch K7 close to the battery side and the second voltage close to the motor side is less than the preset voltage difference. This process can be understood as a capacitor charging process, so that the capacitor has a certain capacity, which can improve the stability of the overall circuit. And the pre-charging resistor R1 in the loop can prevent the loop from short-circuiting and damaging the capacitor. Then the seventh switch K7 is controlled to be turned on and the eighth switch K8 is turned off, so that the power battery system 200 provides the vehicle with a preset high voltage, that is, the high voltage of the whole vehicle is completed.

[0185] It should be noted that this embodiment is not limited to Figure 9-13 As shown, the pre-charging module is arranged at the negative electrode of the battery pack, and it can also be arranged at the positive electrode of the battery pack, and the redundant switch K61 can also be directly used as the eighth switch K8, as long as the pre-charging process can be realized.

[0186] Among them, the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the fifth switch K5, the sixth switch, the seventh switch K7 and the eighth switch K8 can all be relays, MOS tubes or IGBT tubes, etc. The present embodiment does not specifically limit their specific structures and quantities, as long as the above-mentioned control function can be realized by turning the switches on and off.

[0187] Based on the same concept as the above power battery system, this embodiment also provides a battery control method, which is applied to the power battery system of any of the above embodiments, such as Fig.14 As shown, the method includes:

[0188] Step S1, during the process of the power supply module supplying power to the drive module, determining whether there is a battery pack failure.

[0189] The method can be applied to a vehicle domain controller or a battery management system, and this embodiment does not specifically limit this, as long as the battery control method can be implemented. For ease of understanding, the following detailed description is given by taking a battery management system as an example.

[0190] In some embodiments, determining whether a battery pack failure occurs may include the following processing: collecting battery parameters of each battery cell in the power supply module, the battery parameters including at least one of the temperature, current, voltage, and power of the battery cell; and determining whether a battery pack failure occurs based on the battery parameters.

[0191] In view of the various manifestations of battery failure, in this embodiment, the battery management system can collect parameters such as temperature, current, voltage, and power of each battery cell in the power supply module in real time, and judge whether the battery pack is faulty based on at least one of the parameters. When one of the parameters is abnormal, the battery cell is judged to be faulty, and the battery pack where the battery cell is located is also faulty. When determining whether the battery pack is faulty, this method can directly obtain the parameters collected in real time by the battery management system for direct judgment, thereby improving the efficiency of the battery control method.

[0192] Specifically, determining whether there is a battery pack failure based on battery parameters may include the following processing: determining whether there is a battery cell whose battery parameters meet preset failure conditions; if so, determining the battery pack to which the battery cell meeting the preset failure conditions belongs as the failed battery pack.

[0193] The above fault conditions may include but are not limited to battery temperature being too high or too low, battery current being too high or too low, battery voltage being too high or too low, and battery power being too low. As long as one of the conditions is met, it can be determined that the battery pack has a fault. In this way, by detecting multiple battery parameters and judging whether the battery has a fault based on each battery parameter and the preset fault conditions, the accuracy of fault detection can be improved.

[0194] Step S2: If yes, the fault-tolerant module controls the power supply module to use a battery pack that has not failed to supply power.

[0195] In some embodiments, at least two battery packs of the power supply module are connected in series;

[0196] The fault-tolerant module controls the power supply module to use the battery pack that has not failed to supply power, including:

[0197] The fault-tolerant module is used to disconnect the faulty battery pack from the drive module and the battery pack that is not faulty, and to connect the battery pack that is not faulty to the drive module, so that the power supply module uses the battery pack that is not faulty to supply power.

[0198] In some embodiments, the power supply module includes a first battery pack B1 and a second battery pack B2 connected in series; the fault-tolerant module includes a first control circuit, a second control circuit, and a third control circuit;

[0199] The fault-tolerant module controls the power supply module to use the battery pack that has not failed to supply power, including:

[0200] In the event of a failure of the first battery pack B1, the first control circuit controls the first battery pack B1 to be disconnected from the driving module, the third control circuit controls the first battery pack B1 to be disconnected from the second battery pack B2, and the second control circuit controls the second battery pack B2 to be connected to the driving module, so that the power supply module uses the second battery pack B2 for power supply;

[0201] In the event of a failure of the second battery pack B2, the second control circuit controls the second battery pack B2 to be disconnected from the drive module, the third control circuit controls the second battery pack B2 to be disconnected from the first battery pack B1, and the first control circuit controls the first battery pack B1 to be connected to the drive module, so that the power supply module is powered by the first battery pack B1.

[0202] In some embodiments, the first control circuit includes a first switch, and the first switch is disposed between the first battery pack B1 and the driving module;

[0203] Controlling the first battery pack B1 and the driving module to be disconnected or connected by the first control circuit includes:

[0204] When the first battery pack B1 fails, the first switch is turned off to control the disconnection between the first battery pack B1 and the driving module;

[0205] When the second battery pack B2 fails, the first switch is closed to control the conduction between the first battery pack B1 and the driving module.

[0206] In some embodiments, the second control circuit includes a second switch, and the second switch is disposed between the second battery pack B2 and the driving module;

[0207] Controlling the second battery pack B2 and the driving module to be disconnected or connected by the second control circuit includes:

[0208] When the second battery pack B2 fails, the second switch is disconnected to control the second battery pack B2 to be disconnected from the driving module;

[0209] When the first battery pack B1 fails, the second switch is closed to control the conduction between the second battery pack B2 and the driving module.

[0210] In some embodiments, the third control circuit includes a third switch, and the third switch is disposed between the first battery pack B1 and the second battery pack B2;

[0211] Controlling the first battery pack B1 and the second battery pack B2 to be disconnected by a third control circuit includes:

[0212] When a failure occurs in the first battery pack B1 or the second battery pack B2, the third switch is turned off to disconnect the first battery pack and the second battery pack B2.

[0213] In some embodiments, at least two battery packs of the power supply module are connected in parallel;

[0214] The fault-tolerant module controls the power supply module to use the battery pack that has not failed to supply power, including:

[0215] The fault-tolerant module controls the disconnection between the faulty battery pack and the drive module, and controls the connection between the healthy battery pack and the drive module, so that the power supply module uses the healthy battery pack for power supply.

[0216] In some embodiments, the power supply module includes a third battery pack and a fourth battery pack connected in parallel;

[0217] The fault-tolerant module controls the power supply module to use the battery pack that has not failed to supply power, including:

[0218] In the event of a failure of the third battery pack, the third battery pack is disconnected from the driving module through the fourth control circuit, and the fourth battery pack is connected to the driving module through the fifth control circuit, so that the power supply module uses the fourth battery pack for power supply;

[0219] In the event of a failure of the fourth battery pack, the fifth control circuit controls the disconnection between the fourth battery pack and the drive module, and the fourth control circuit controls the conduction between the third battery pack and the drive module, so that the power supply module uses the third battery pack for power supply.

[0220] In some embodiments, the fourth control circuit includes a fourth switch, and the fourth switch is arranged between the third battery pack and the driving module;

[0221] Controlling the disconnection or connection between the third battery pack and the driving module by the fourth control circuit includes:

[0222] In the event of a failure of the third battery pack, the fourth switch is disconnected to control the disconnection between the third battery pack and the drive module;

[0223] In the event of a failure of the fourth battery pack, the fourth switch is closed to control conduction between the third battery pack and the driving module.

[0224] In some embodiments, the fifth control circuit includes a fifth switch, and the fifth switch is disposed between the fourth battery pack and the driving module;

[0225] Controlling the disconnection or connection between the fourth battery pack and the driving module by the fifth control circuit includes:

[0226] In the event of a failure of the fourth battery pack, the fifth switch is disconnected to control the disconnection between the fourth battery pack and the drive module;

[0227] In the event of a failure of the third battery pack, the fifth switch is closed to control conduction between the fourth battery pack and the driving module.

[0228] In some embodiments, the fault-tolerant module further includes a sixth switch, which is disposed between the power supply module and the drive module to control the on / off between at least one battery pack and the drive module;

[0229] The fault-tolerant module controls the power supply module to use a battery pack that has not failed to supply power, and also includes:

[0230] The sixth switch is turned off to disconnect the faulty battery pack from the driving module, so that the power supply module uses the healthy battery pack for power supply.

[0231] In some embodiments, the power battery system further includes a voltage regulating module, which is disposed between the power supply module and the drive module;

[0232] The battery control method also includes:

[0233] The voltage provided to the driving module is increased by the voltage regulating module.

[0234] In some embodiments, the voltage regulation module includes a voltage regulation circuit and an energy storage unit;

[0235] The voltage provided to the driver module is increased by the voltage regulator module, including:

[0236] Control the power supply module, the voltage regulating circuit, and the energy storage unit to form a discharge circuit, so that the power supply module discharges to the energy storage unit;

[0237] The control discharge circuit is disconnected, and the control power supply module and the energy storage unit discharge to the drive module at the same time.

[0238] In some embodiments, the voltage regulating circuit includes two-phase bridge arms, one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one phase bridge arm, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm;

[0239] The control power supply module, voltage regulation circuit and energy storage unit constitute a discharge circuit, including:

[0240] The upper bridge arm of one phase bridge arm and the lower bridge arm of the other phase bridge arm in the two-phase bridge arm are controlled to be turned on, so that the power supply module, the voltage regulating circuit and the energy storage unit form a discharge loop.

[0241] The battery control method provided in this embodiment uses a fault-tolerant module to promptly disconnect the connection between the battery pack that has failed and the drive module when some batteries fail, so that the power supply module continues to supply power to the drive module using the battery pack that has not failed. The safe use of the electrical equipment can still be achieved without emergency parking and waiting for the battery to be returned to the factory for inspection before use, thereby greatly improving the user's power experience

[0242] It can be understood that this embodiment is based on the same concept as the above-mentioned power battery system. The various implementations and beneficial effects of the above-mentioned power battery system are also applicable to the battery control method provided in this embodiment, and will not be described in detail here.

[0243] Based on the same concept as the above power battery system, this embodiment also provides a battery control device for executing the above battery control method, such as Fig.15 As shown, the battery control device includes:

[0244] A fault determination module, used to determine whether there is a battery pack fault during the process of the power supply module supplying power to the drive module;

[0245] The fault-tolerant control module is used to control the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module.

[0246] Specifically, the battery control device may be a vehicle domain controller or a battery management system, or other specially configured control devices. This embodiment does not specifically limit its specific structure, as long as the above-mentioned control method can be implemented.

[0247] It can be understood that this embodiment is based on the same concept as the above-mentioned power battery system. The various implementations and beneficial effects of the above-mentioned power battery system are also applicable to the battery control device provided in this embodiment, and will not be described in detail here.

[0248] Based on the same concept as the above power battery system, this embodiment further provides an electrical device, including the power battery system of any one of the above embodiments, and the above battery control device.

[0249] Specifically, the electrical equipment may be an electric vehicle, an electric toy, a ship, a spacecraft, etc., which may have a power battery, a motor, and a motor inverter.

[0250] It can be understood that this embodiment is based on the same concept as the above-mentioned power battery system, and the various implementations and beneficial effects of the above-mentioned power battery system are also applicable to the electrical equipment provided in this embodiment, and will not be described in detail here.

[0251] The present application also provides an electronic device to execute the above-mentioned battery control method. The electronic device may be a vehicle domain controller or a battery management system, or other specially configured controllers. Fig.16 , which shows a schematic diagram of an electrical device provided by some embodiments of the present application. Fig.16 As shown, the electric device 40 includes: a processor 400, a memory 401, a bus 402 and a communication interface 403. The processor 400, the communication interface 403 and the memory 401 are connected via the bus 402; the memory 401 stores a computer program that can be run on the processor 400, and when the processor 400 runs the computer program, it executes the power battery system provided by any of the aforementioned embodiments of the present application.

[0252] The memory 401 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the device network element and at least one other network element is realized through at least one communication interface 403 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0253] The bus 402 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. Among them, the memory 401 is used to store programs, and the processor 400 executes the program after receiving the execution instruction. The power battery system disclosed in any implementation of the above-mentioned embodiment of the present application can be applied to the processor 400, or implemented by the processor 400.

[0254] The processor 400 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 400. The above processor 400 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a readily available programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 401, and the processor 400 reads the information in the memory 401 and completes the steps of the above method in combination with its hardware.

[0255] The electric equipment provided in the embodiment of the present application and the power battery system provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the methods of adopting, operating or implementing them.

[0256] The present application also provides a computer-readable storage medium corresponding to the power battery system provided in the above embodiment. Fig.17 The computer-readable storage medium shown is a CD 30 on which a computer program (ie, a program product) is stored. When the computer program is run by a processor, the power battery system provided by any of the aforementioned embodiments will be executed.

[0257] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0258] The computer-readable storage medium provided in the above-mentioned embodiments of the present application and the power battery system provided in the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0259] 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 them; 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 by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A power battery system, characterized in that: include: A power supply module, comprising at least two battery packs; A driving module connected to the power supply module and used to convert the electrical energy provided by the power supply module into mechanical energy; the driving module includes an inverter and a motor, and the inverter is connected to the power supply module; the driving module also includes a heating circuit, and the heating circuit is connected in parallel with the power supply module; A voltage regulating module, wherein the voltage regulating module is arranged between the power supply module and the driving module; A fault-tolerant module, arranged between the power supply module and the heating circuit of the driving module, for controlling the power supply module to use a battery pack that has not failed to supply power when a part of the battery pack fails; Wherein, the heating circuit includes an upper bridge arm and a lower bridge arm; the upper bridge arm of the inverter and the lower bridge arm of the heating circuit are controlled to be turned on, so that the power supply module, the inverter, the heating circuit and the motor form a charging circuit; and the lower bridge arm of the inverter and the upper bridge arm of the heating circuit are controlled to be turned on, so that the power supply module, the inverter, the heating circuit and the motor form a discharge circuit that alternates with the charging circuit; so as to self-heat the battery pack of the power supply module by charging and discharging the battery pack.

2. The power battery system according to claim 1, characterized in that: The at least two battery packs are connected in series; When some battery packs fail, the fault-tolerant module controls the battery packs with the failure to be disconnected from the drive module and the battery packs that have not failed, and controls the battery packs that have not failed to be connected to the drive module.

3. The power battery system according to claim 2, characterized in that: The power supply module includes a first battery pack and a second battery pack connected in series; The fault-tolerant module includes a first control circuit, a second control circuit and a third control circuit. The first control circuit is used to control the on-off between the first battery group and the driving module; the second control circuit is used to control the on-off between the second battery group and the driving module; the third control circuit is used to control the on-off between the first battery group and the second battery group.

4. The power battery system according to claim 3, characterized in that: The first control circuit includes a first switch, and the first switch is arranged between the first battery pack and the driving module; The negative electrode of the first battery pack is connected to the positive electrode of the second battery pack, one end of the first switch is connected to the negative electrode of the first battery pack, and the other end is connected in line with the negative electrode of the second battery pack and the first end of the driving module.

5. The power battery system according to claim 3, characterized in that: The second control circuit includes a second switch, and the second switch is arranged between the second battery pack and the driving module; The negative electrode of the first battery pack is connected to the positive electrode of the second battery pack, one end of the second switch is connected to the positive electrode of the first battery, and the other end is connected in line with the positive electrode of the second battery pack and the second end of the driving module.

6. The power battery system according to claim 3, characterized in that: The third control circuit includes a third switch, and the third switch is arranged between the first battery group and the second battery group; One end of the third switch is connected to the negative electrode of the first battery pack, and the other end is connected to the positive electrode of the second battery pack.

7. The power battery system according to claim 2, characterized in that: It also includes a voltage regulating module, which is arranged between the power supply module and the driving module and is used to increase the voltage provided to the driving module when a part of the battery packs of the power supply module fails.

8. The power battery system according to claim 7, characterized in that: The voltage regulating module includes a voltage regulating circuit and an energy storage unit. The power supply module, the voltage regulating circuit and the energy storage unit are controlled to form a discharge circuit so that the power supply module discharges to the energy storage unit; and the discharge circuit is controlled to be disconnected so that the power supply module and the energy storage unit are controlled to discharge to the driving module at the same time.

9. The power battery system according to claim 8, characterized in that: The voltage regulating circuit comprises two-phase bridge arms, one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one phase bridge arm, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm.

10. The power battery system according to claim 1, characterized in that: The at least two battery packs are connected in parallel; When some battery packs fail, the fault-tolerant module controls the battery packs that fail to connect to the drive module, and controls the battery packs that do not fail to connect to the drive module.

11. The power battery system according to claim 10, characterized in that: The power supply module includes a third battery pack and a fourth battery pack connected in parallel; The fault-tolerant module includes a fourth control circuit and a fifth control circuit, wherein the fourth control circuit is used to control the on-off between the third battery pack and the driving module; and the fifth control circuit is used to control the on-off between the fourth battery pack and the driving module.

12. The power battery system according to claim 11, characterized in that: The fourth control circuit includes a fourth switch, and the fourth switch is arranged between the third battery pack and the driving module; One end of the fourth switch is connected to the positive electrode of the third battery pack, and the other end is connected in a collinear manner to the positive electrode of the fourth battery pack and the second end of the driving module.

13. The power battery system according to claim 11, characterized in that: The fifth control circuit includes a fifth switch, and the fifth switch is arranged between the fourth battery pack and the driving module; One end of the fifth switch is connected to the positive electrode of the fourth battery pack, and the other end is connected in a collinear manner to the positive electrode of the third battery pack and the second end of the driving module.

14. The power battery system according to any one of claims 1 to 13, characterized in that: The fault-tolerant module further includes a sixth switch, which is disposed between the power supply module and the drive module and controls the connection and disconnection between at least one battery pack and the drive module.

15. The power battery system according to any one of claims 1 to 14, characterized in that: The driving module also includes an M-phase inverter bridge arm and an M-phase motor. The M-phase inverter bridge arm is connected in parallel with the power supply module. The windings of the M-phase motor are respectively connected one-to-one with the bridge arms of the M-phase inverter bridge arm. The neutral line of the M-phase motor is connected to the heating circuit.

16. The power battery system according to any one of claims 1 to 15, characterized in that: It also includes a pre-charging module, which is arranged between the power supply module and the drive module and is used to enable the power battery system to provide a preset high voltage to the entire vehicle.

17. The power battery system according to claim 16, characterized in that: The pre-charging module includes a seventh switch, an eighth switch and a pre-charging resistor; the eighth switch and the pre-charging resistor are connected in series, and are both connected in parallel with the seventh switch.

18. A battery control method, characterized in that: Applied to the power battery system according to any one of claims 1 to 17, the method comprising: During the process of the power supply module supplying power to the drive module, determining whether there is a battery pack failure; If yes, the fault-tolerant module controls the power supply module to use a battery pack that has not failed to supply power.

19. The battery control method according to claim 18, characterized in that: At least two battery packs of the power supply module are connected in series; The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes: The fault-tolerant module is used to disconnect the faulty battery pack from the drive module and the battery pack that has not failed, and to connect the battery pack that has not failed to the drive module, so that the power supply module uses the battery pack that has not failed to supply power.

20. The battery control method according to claim 19, characterized in that: The power supply module includes a first battery pack and a second battery pack connected in series; the fault-tolerant module includes a first control circuit, a second control circuit and a third control circuit; The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes: In the event of a failure of the first battery pack, the first control circuit controls the first battery pack to be disconnected from the driving module, the third control circuit controls the first battery pack to be disconnected from the second battery pack, and the second control circuit controls the second battery pack to be connected to the driving module, so that the power supply module uses the second battery pack for power supply; In the event of a failure of the second battery pack, the second control circuit controls the second battery pack to be disconnected from the drive module, the third control circuit controls the second battery pack to be disconnected from the first battery pack, and the first control circuit controls the first battery pack to be connected to the drive module, so that the power supply module is powered by the first battery pack.

21. The battery control method according to claim 20, characterized in that: The first control circuit includes a first switch, and the first switch is arranged between the first battery pack and the driving module; The controlling the first battery pack and the driving module to be disconnected or connected by the first control circuit includes: In the event of a failure of the first battery pack, the first switch is disconnected to control the first battery pack to be disconnected from the driving module; In the event that the second battery pack fails, the first switch is closed to control conduction between the first battery pack and the driving module.

22. The battery control method according to claim 20, characterized in that: The second control circuit includes a second switch, and the second switch is arranged between the second battery pack and the driving module; The controlling the second battery pack to be disconnected or connected to the driving module by the second control circuit includes: In the event of a failure of the second battery pack, the second switch is disconnected to control the second battery pack to be disconnected from the driving module; In the event of a failure of the first battery pack, the second switch is closed to control conduction between the second battery pack and the driving module.

23. The battery control method according to claim 20, characterized in that: The third control circuit includes a third switch, and the third switch is arranged between the first battery group and the second battery group; Controlling the first battery pack and the second battery pack to be disconnected by the third control circuit includes: In the event of a failure of the first battery pack or the second battery pack, the third switch is disconnected to control the disconnection between the first battery pack and the second battery pack.

24. The battery control method according to claim 18, characterized in that: At least two battery packs of the power supply module are connected in parallel; The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes: The fault-tolerant module controls the disconnection between the faulty battery pack and the driving module, and controls the connection between the healthy battery pack and the driving module, so that the power supply module uses the healthy battery pack for power supply.

25. The battery control method according to claim 18, characterized in that: The power supply module includes a third battery pack and a fourth battery pack connected in parallel; The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module includes: In the event of a failure of the third battery pack, the third battery pack is disconnected from the driving module by the fourth control circuit, and the fourth battery pack is connected to the driving module by the fifth control circuit, so that the power supply module uses the fourth battery pack for power supply; In the event of a failure of the fourth battery pack, the fifth control circuit controls the disconnection between the fourth battery pack and the drive module, and the fourth control circuit controls the conduction between the third battery pack and the drive module, so that the power supply module uses the third battery pack for power supply.

26. The battery control method according to claim 25, characterized in that: The fourth control circuit includes a fourth switch, and the fourth switch is arranged between the third battery pack and the driving module; Controlling the disconnection or connection between the third battery pack and the driving module by the fourth control circuit includes: In the event of a failure of the third battery pack, disconnecting the fourth switch to control the disconnection between the third battery pack and the driving module; In the event that the fourth battery pack fails, the fourth switch is closed to control conduction between the third battery pack and the driving module.

27. The battery control method according to claim 25, characterized in that: The fifth control circuit includes a fifth switch, and the fifth switch is arranged between the fourth battery pack and the driving module; Controlling the disconnection or connection between the fourth battery pack and the driving module by the fifth control circuit includes: In the event of a failure of the fourth battery pack, the fifth switch is disconnected to control the disconnection between the fourth battery pack and the driving module; In the event that the third battery pack fails, the fifth switch is closed to control conduction between the fourth battery pack and the driving module.

28. The battery control method according to any one of claims 18 to 27, characterized in that: The fault-tolerant module further includes a sixth switch, which is disposed between the power supply module and the drive module to control the connection and disconnection between at least one battery pack and the drive module; The method of controlling the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module also includes: The sixth switch is turned off to control the disconnection between the battery pack with the fault and the driving module, so that the power supply module uses the battery pack without the fault to supply power.

29. The battery control method according to claim 18, characterized in that: The determining whether there is a battery pack failure comprises: Collecting battery parameters of each battery cell in the power supply module, wherein the battery parameters include at least one of temperature, current, voltage, and power of the battery cell; It is determined whether a battery pack failure occurs based on the battery parameters.

30. The battery control method according to claim 29, characterized in that: Determining whether a battery pack failure occurs according to the battery parameters includes: Determine whether there is a battery cell whose battery parameters meet a preset fault condition; If so, the battery pack to which the battery cells meeting the preset fault condition belong is determined as the faulty battery pack.

31. The battery control method according to claim 18, characterized in that: The power battery system further includes a voltage regulating module, which is disposed between the power supply module and the drive module; The battery control method further includes: The voltage provided to the driving module is increased by the voltage regulating module.

32. The battery control method according to claim 31, characterized in that: The voltage regulation module includes a voltage regulation circuit and an energy storage unit; Increasing the voltage provided to the driving module by the voltage regulating module includes: Controlling the power supply module, the voltage regulating circuit, and the energy storage unit to form a discharge circuit, so that the power supply module discharges to the energy storage unit; The discharge circuit is controlled to be disconnected, and the power supply module and the energy storage unit are controlled to discharge to the drive module at the same time.

33. The battery control method according to claim 32, characterized in that: The voltage regulating circuit comprises two-phase bridge arms, one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one phase bridge arm, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm; Controlling the power supply module, the voltage regulating circuit, and the energy storage unit to form a discharge circuit includes: The upper bridge arm of one phase bridge arm and the lower bridge arm of the other phase bridge arm in the two-phase bridge arm are controlled to be turned on, so that the power supply module, the voltage regulating circuit and the energy storage unit form a discharge loop.

34. A battery control device, characterized in that: The power battery system according to any one of claims 1 to 17 comprises: A fault determination module, used to determine whether there is a battery pack fault during the process of the power supply module supplying power to the drive module; The fault-tolerant control module is used to control the power supply module to use a battery pack that has not failed to supply power through the fault-tolerant module.

35. An electrical device, characterized in that: It comprises the power battery system as described in any one of claims 1 to 17, and the battery control device as described in claim 34.

36. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: The processor runs the computer program to implement the method according to any one of claims 18 to 33.

37. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method according to any one of claims 18 to 33.

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