CN115378065A

CN115378065A - Power battery system, battery control method, device, equipment and storage medium

Info

Publication number: CN115378065A
Application number: CN202210590948.1A
Authority: CN
Inventors: 黄孝键; 赵元淼; 张立权; 但志敏; 陈兴
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-11-22
Also published as: WO2023226561A1

Abstract

The application discloses power battery system, battery control method, device, equipment and storage medium, this power battery system includes: a power supply module including at least two battery packs; the driving module is connected with the power supply module and used for converting the electric energy provided by the power supply module into mechanical energy; and the fault-tolerant module is arranged between the power supply module and the driving module and is used for controlling the power supply module to adopt the battery pack which does not have faults to supply power when part of the battery packs have faults. According to the method and the device, when partial batteries have faults, the faulty batteries can be disconnected in time, and the remaining batteries which are not faulty are adopted for power supply.

Description

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

Technical Field

The application belongs to the technical field of power batteries, and particularly relates to a power battery system, a battery control method, a battery control device, equipment and a storage medium.

Background

At present, electric equipment such as an electric automobile and an electric airplane generally comprises a power battery and a motor, wherein the power battery is used as a power supply module to supply power to a driving module (generally comprising the motor and an inverter), and the driving module converts electric energy into mechanical energy so as to drive the electric equipment to operate.

Wherein, power battery is as the power supply, when meetting unexpected trouble in daily use, generally need emergency stop to return the battery to the factory detects, in order to ensure driving safety, this has caused very big inconvenience to the car owner trip.

Disclosure of Invention

In view of the above problems, the present application provides a power battery system, a battery control method, a device, an apparatus, and a storage medium, which can timely disconnect a failed battery and use the remaining non-failed batteries to supply power when a part of the batteries fail.

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

a power supply module including at least two battery packs;

the driving module is connected with the power supply module and is used for converting the electric energy provided by the power supply module into mechanical energy;

and the fault-tolerant module is arranged between the power supply module and the driving module and is used for controlling the power supply module to adopt the battery pack which does not have faults to supply power when part of the battery packs have faults.

In the embodiment of the first aspect, by arranging the fault-tolerant module, when part of batteries are in fault, the connection between the battery pack sending the fault and the driving module can be timely disconnected, so that the power supply module adopts the battery pack which does not have the fault to continuously supply power to the driving module, the safe use of the electric equipment can still be realized, the emergency stop is not needed, and the batteries are waited to return to a factory for detection and then be used, so that the power consumption experience of a user is greatly improved.

In some embodiments, the at least two battery packs are each connected in series; when part of the battery packs have faults, the fault-tolerant module controls the battery packs with the faults to be disconnected with the driving module and the battery packs without the faults and controls the battery packs without the faults to be connected with the driving module.

When the battery packs are connected in series, if part of the battery packs fail, in order to avoid the failed battery packs interfering with the battery packs that do not fail, it is necessary to disconnect not only the failed battery packs from the driving module but also the failed battery packs from the battery packs that do not fail. And the conduction between the battery pack which does not have the fault and the driving module is kept, so that the battery pack which does not have the fault can supply power to the driving module.

In some embodiments, the power supply module comprises a first battery pack and a second battery pack connected in series; the fault-tolerant module comprises a first control circuit, a second control circuit and a third control circuit, wherein the first control circuit is used for controlling the connection and disconnection between the first battery pack and the driving module; the second control circuit is used for controlling the connection and disconnection between the second battery pack and the driving module; and the third control circuit is used for controlling the connection and disconnection between the first battery pack and the second battery pack.

In the embodiment, three control circuits are provided for the first battery pack and the second battery pack which are connected in series, and are respectively used for controlling the on-off between the first battery pack and the driving module, the on-off between the second battery pack and the driving module, and the on-off between the two battery packs. Therefore, when one battery pack has a fault, the three control circuits can respectively control the disconnection between the battery pack with the fault and the drive module, the disconnection between the two battery packs and the connection between the battery pack without the fault and the drive module, so that the power supply module only adopts the battery pack without the fault to carry out the fault. And the three control circuits are definite in division of labor, are beneficial to respectively controlling the first battery pack and the second battery pack, and are also convenient for subsequent maintenance and fault detection.

In some embodiments, the first control circuit comprises a first switch disposed between the first battery pack and the drive module; the negative pole of the first battery pack is connected with the positive pole of the second battery pack, one end of the first switch is connected with the negative pole of the first battery pack, and the other end of the first switch is in collinear connection with the negative pole of the second battery pack and the first end of the driving module.

In this way, one end of the first switch is connected to the negative electrode of the first battery pack, and the other end of the first switch is connected 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 with the first battery pack in series and connected with the second battery pack in parallel, on-off between the first battery pack and the driving module can be achieved through on-off of the first switch, control logic is simple, and operation is convenient. And because the first switch is connected with the second battery pack in parallel, the on-off between the second battery pack and the driving module can not be influenced, the first switch can independently control the first battery pack, and the safety and reliability of the whole power battery system can be improved.

In some embodiments, the second control circuit comprises a second switch disposed between the second battery pack and the drive module; the negative pole of the first battery pack is connected with the positive pole of the second battery pack, one end of the second switch is connected with the positive pole of the first battery, and the other end of the second switch is in collinear connection with the positive pole of the second battery pack and the second end of the driving module.

So, through setting up the second switch to connect the positive pole of second group battery with the one end of second switch, the other end is connected with the positive pole of first group battery and drive module's second end collineation. The second switch is connected with the second battery pack in series and connected with the first battery pack in parallel, on-off between the second battery pack and the driving module can be achieved through on-off of the second switch, control logic is simple, and operation is convenient. And because the second switch is connected with the first battery pack in parallel, the on-off between the first battery pack and the driving module can not be influenced, the independent control of the second switch on the second battery pack is realized, and the safety and reliability performance of the whole power battery system can be improved.

In some embodiments, the third control circuit includes a third switch disposed between the first battery pack and the second battery pack; one end of the third switch is connected with the negative electrode of the first battery pack, and the other end of the third switch is connected with the positive electrode of the second battery pack.

So, through set up the third switch between first group battery and second group battery, be used for controlling the break-make between first group battery and the second group battery specially, simple structure, convenient operation can realize the independent control between first group battery and the second group battery, more is favorable to improving whole power battery system's safe and reliable performance.

In some embodiments, the power supply module further comprises a voltage regulating module, wherein the voltage regulating module is arranged between the power supply module and the driving module and is used for increasing the voltage provided to the driving module when part of the battery packs of the power supply module have faults. The high-voltage requirement of the whole vehicle is met, and the driving safety is further improved.

In some embodiments, the voltage regulating module comprises a voltage regulating circuit and an energy storage unit, and the power supply module discharges to the energy storage unit by controlling the power supply module, the voltage regulating circuit and the energy storage unit to form a discharge loop; and controlling the discharge loop to be disconnected, and controlling the power supply module and the energy storage unit to discharge to the driving module at the same time.

In the embodiment, the voltage regulating module comprising the voltage regulating circuit and the energy storage unit is arranged, so that when part of the battery pack breaks down, the power supply module, the voltage regulating circuit and the energy storage unit are controlled to form a discharging loop, the power supply module discharges to the energy storage unit, and the energy storage unit can store energy. When the stored energy of the energy storage unit reaches a certain value (which may be set according to an actual situation, and this embodiment does not specifically limit this), the discharging circuit may be controlled to be turned off (specifically, any element or switch on the circuit may be turned off), and then the energy storage unit may supply power to the driving module together with the battery pack that does not fail, so as to compensate for the voltage provided by the battery pack that does not fail to the driving module, thereby increasing the voltage provided to the driving module.

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 of the bridge arm, and the other end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of the other phase of the bridge arm.

When the discharging loop is formed, the upper bridge arm of one phase of bridge arm and the lower bridge arm of the other phase of bridge arm in the two phase of bridge arms of the voltage regulating circuit can be controlled to be conducted, so that the power supply module, the voltage regulating circuit and the energy storage unit form the discharging loop. After the energy storage is finished, when the energy storage is discharged to the driving module, two upper bridge arms (or two lower bridge arms) of two phase bridge arms in the voltage regulating circuit can be controlled to be conducted, so that the current provided by the power supply module can be transmitted to the driving module through the voltage regulating circuit and the energy storage unit.

In some embodiments, the at least two battery packs are each connected in parallel; when part of the battery packs are in fault, the fault-tolerant module controls the battery packs in fault to be disconnected with the driving module and controls the battery packs not in fault to be connected with the driving module.

When the battery packs are connected in parallel, if part of the battery packs are in fault, the battery packs in fault cannot interfere with the battery packs without fault, and only the connection between the battery packs with fault and the driving module needs to be disconnected, and the battery packs without fault and the driving module are kept in conduction, so that the battery packs with fault cannot supply power to the driving module any more, and the battery packs without fault can supply power to the driving module.

In some embodiments, the power supply module comprises a third battery pack and a fourth battery pack connected in parallel; the fault-tolerant module comprises a fourth control circuit and a fifth control circuit, and the fourth control circuit is used for controlling the connection and disconnection between the third battery pack and the driving module; the fifth control circuit is used for controlling the connection and disconnection between the fourth battery pack and the driving module.

In this embodiment, for the parallel connection of the third battery pack and the fourth battery pack, a fourth control circuit and a fifth control circuit are respectively provided, where one of the fourth control circuit and the fifth control circuit is used to control the on/off between the third battery pack and the driving module, and the other is used to control the on/off between the fourth battery pack and the driving module. Therefore, when one battery pack has a fault, the fourth control circuit and the fifth control circuit can respectively control the disconnection between the battery pack with the fault and the driving module and the conduction between the battery pack without the fault and the driving module, so that the power supply module only adopts the battery pack without the fault to carry out the fault. And the fourth control circuit and the fifth control circuit are clear in division of labor, are beneficial to respectively controlling the third battery pack and the fourth battery pack, and are convenient for subsequent maintenance and fault detection.

In some embodiments, the fourth control circuit comprises a fourth switch disposed between the third battery pack and the drive module; one end of the fourth switch is connected with the anode of the third battery pack, and the other end of the fourth switch is in collinear connection with the anode of the fourth battery pack and the second end of the driving module.

In this way, one end of the fourth switch is connected to the positive electrode of the third battery pack, and the other end of the fourth switch is connected in a collinear manner to the positive electrode of the fourth battery pack and the second end of the driving module. The fourth switch is connected with the third battery pack in series and connected with the fourth battery pack in parallel, on-off between the third battery pack and the driving module can be achieved through on-off of the fourth switch, control logic is simple, and operation is convenient. And because the fourth switch is connected with the fourth battery pack in parallel, the on-off between the fourth battery pack and the driving module can not be influenced, the independent control of the fourth switch on the third battery pack is realized, and the safety and reliability performance of the whole power battery system can be improved.

In some embodiments, the fifth control circuit comprises a fifth switch disposed between the fourth battery pack and the drive module; one end of the fifth switch is connected with the anode of the fourth battery pack, and the other end of the fifth switch is in collinear connection with the anode of the third battery pack and the second end of the driving module.

In this way, one end of the fifth switch is connected to the positive electrode of the fourth battery pack, and the other end of the fifth switch is connected to the positive electrode of the third battery pack and the second end of the driving module in a collinear manner. The fifth switch is connected with the fourth battery pack in series and connected with the third battery pack in parallel, on-off between the fourth battery pack and the driving module can be achieved through on-off of the fifth switch, control logic is simple, and operation is convenient. And because the fifth switch is connected with the third battery pack in parallel, the on-off between the third battery pack and the driving module is not influenced, the independent control of the fifth switch on the fourth battery pack is realized, and the safety and reliability performance of the whole power battery system is improved.

In some embodiments, the fault tolerant module further comprises a sixth switch, which is disposed between the power supply module and the driving module and controls on/off between at least one battery pack and the driving module. The redundancy control of the fault-tolerant module is realized, and the safety and reliability of the power battery system are further improved.

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 both connected in parallel with the power supply module, windings of the M-phase motor are respectively connected to bridge arms of the M-phase inverter bridge arm in a one-to-one correspondence, and a neutral line of the M-phase motor is connected to the heating circuit. The driving module with the heating circuit can perform battery self-heating when the temperature of the battery is lower so as to adapt to lower external temperature.

In some embodiments, the power battery system further comprises a pre-charging module, wherein the pre-charging module is arranged between the power supply module and the driving module and is used for enabling the power battery system to provide a preset high voltage for the whole vehicle. So as to realize the high-pressure process on the whole vehicle before providing running power for the whole vehicle.

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

When high voltage is applied to the whole vehicle, the eighth switch and the pre-charging resistor can be controlled to be switched on firstly, so that a loop in series connection is formed between the power supply module and the capacitor as well as between the eighth switch and the pre-charging resistor, the capacitor can be charged until the difference value between the first voltage of the seventh switch close to the battery side and the second voltage close to the motor side is smaller than the preset voltage difference, the process can be understood as a capacitor charging process, the capacitor has certain capacity, and the stability of the whole circuit can be improved. And the pre-charging resistor is arranged in the loop, so that the short circuit of the loop and the damage to the capacitor can be prevented. And then the seventh switch is controlled to be switched on and the eighth switch is controlled to be switched off, so that the power battery system provides preset high voltage for the vehicle, and the high voltage on the whole vehicle is completed.

In a second aspect, the present application provides a battery control method applied to the power battery system of the first aspect, the method including:

in the process that the power supply module supplies power to the driving module, whether the battery pack has a fault is determined;

if so, controlling the power supply module to supply power by adopting the battery pack without faults through the fault-tolerant module.

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

control through fault-tolerant module power module adopts the group battery that does not break down to supply power, includes:

the fault-tolerant module is used for controlling the battery pack with the fault to be disconnected with the driving module and the battery pack without the fault, and controlling the battery pack without the fault to be connected with the driving module, so that the power supply module adopts the battery pack without the fault to supply power.

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

control through fault-tolerant module power module adopts the group battery that does not break down to supply power, include:

under the condition that the first battery pack has a fault, the first control circuit controls the first battery pack to be disconnected with the driving module, the third control circuit controls the first battery pack to be disconnected with the second battery pack, and the second control circuit controls the second battery pack to be connected with the driving module, so that the power supply module adopts the second battery pack to supply power;

under the condition that the second battery pack has a fault, the second control circuit controls the second battery pack to be disconnected with the driving module, the third control circuit controls the second battery pack to be disconnected with the first battery pack, and the first control circuit controls the first battery pack to be connected with the driving module, so that the power supply module supplies power by adopting the first battery pack.

In some embodiments, the first control circuit comprises a first switch disposed between the first battery pack and the drive module;

the controlling of the first battery pack and the driving module through the first control circuit to be disconnected or connected includes:

under the condition that the first battery pack has a fault, the first switch is switched off, and the first battery pack and the driving module are controlled to be switched off;

and under the condition that the second battery pack has a fault, the first switch is closed, and the conduction between the first battery pack and the driving module is controlled.

In some embodiments, the second control circuit comprises a second switch disposed between the second battery pack and the drive module;

the controlling of the second battery pack and the driving module through the second control circuit includes:

under the condition that the second battery pack has a fault, the second switch is switched off, and the second battery pack and the driving module are controlled to be switched off;

and under the condition that the first battery pack has a fault, the second switch is closed, and the conduction between the second battery pack and the driving module is controlled.

In some embodiments, the third control circuit comprises a third switch disposed between the first battery pack and the second battery pack;

controlling, by the third control circuit, a disconnection between the first battery pack and the second battery pack, including:

and when the first battery pack or the second battery pack has a fault, the third switch is switched off, and the disconnection between the first battery and the second battery pack is controlled.

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

the fault-tolerant module is used for controlling the battery pack with the fault to be disconnected with the driving module and controlling the battery pack without the fault to be connected with the driving module, so that the power supply module adopts the battery pack without the fault to supply power.

In some embodiments, the power supply module comprises a third battery pack and a fourth battery pack connected in parallel;

under the condition that the third battery pack has a fault, the fourth control circuit controls the third battery pack to be disconnected with the driving module, and the fifth control circuit controls the fourth battery pack to be connected with the driving module, so that the power supply module supplies power by adopting the fourth battery pack;

under the condition that the fourth battery pack has a fault, the fifth control circuit controls the fourth battery pack to be disconnected with the driving module, and the fourth control circuit controls the third battery pack to be connected with the driving module, so that the power supply module supplies power by adopting the third battery pack.

In some embodiments, the fourth control circuit comprises a fourth switch disposed between the third battery pack and the drive module;

controlling, by the fourth control circuit, disconnection or conduction between the third battery pack and the driving module, including:

under the condition that the third battery pack has a fault, the fourth switch is switched off, and the disconnection between the third battery pack and the driving module is controlled;

and under the condition that the fourth battery pack has a fault, closing the fourth switch to control the conduction between the third battery pack and the driving module.

In some embodiments, the fifth control circuit comprises a fifth switch disposed between the fourth battery pack and the drive module;

controlling, by the fifth control circuit, disconnection or conduction between the fourth battery pack and the driving module, including:

under the condition that the fourth battery pack has a fault, the fifth switch is switched off, and the fourth battery pack is controlled to be switched off from the driving module;

and under the condition that the third battery pack has a fault, closing the fifth switch to control the conduction between the fourth battery pack and the driving module.

In some embodiments, the fault tolerant module further comprises a sixth switch, which is disposed between the power supply module and the driving module and controls on/off between at least one battery pack and the driving module;

control through fault-tolerant module power module adopts the group battery that does not break down to supply power, still includes:

and disconnecting the sixth switch to control the disconnection between the battery pack with the fault and the driving module, so that the power supply module adopts the battery pack without the fault to supply power.

In some embodiments, the determining whether there is a battery pack failure comprises:

collecting battery parameters of each battery monomer in the power supply module, wherein the battery parameters comprise at least one of temperature, current, voltage and electric quantity of the battery monomer;

and determining whether the battery pack has a fault according to the battery parameters.

In some embodiments, determining whether there is a battery pack failure based on the battery parameters comprises:

determining whether a battery monomer with battery parameters meeting preset fault conditions exists;

if so, determining the battery pack to which the single battery meeting the preset fault condition belongs as the battery pack with the fault.

In some embodiments, the power battery system further comprises a voltage regulation module disposed between the power supply module and the drive module;

the battery control method further includes:

and increasing the voltage provided for the driving module through the voltage regulating module.

In some embodiments, the voltage regulating module comprises a voltage regulating circuit and an energy storage unit;

the increasing of 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 loop so that the power supply module discharges to the energy storage unit;

and controlling the discharge loop to be disconnected, and controlling the power supply module and the energy storage unit to discharge to the driving module at the same time.

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 of the two-phase bridge arms, and the other end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of the other one of the two-phase bridge arms;

control power module, voltage regulating circuit the energy storage unit constitutes the circuit of discharging, includes:

and controlling the upper bridge arm of one phase of bridge arm and the lower bridge arm of the other phase of bridge arm to be conducted so that the power supply module, the voltage regulating circuit and the energy storage unit form a discharge loop.

In a third aspect, the present application provides a battery control apparatus comprising:

the fault determining module is used for determining whether the battery pack has faults or not in the process of supplying power to the driving module by the power supply module;

and the fault-tolerant control module is used for controlling the power supply module to adopt the battery pack which does not have a fault to supply power through the fault-tolerant module if the fault-tolerant control module is yes.

In a fourth aspect, the present application provides a power plant comprising the power cell system of the first aspect of the claims, and the battery control apparatus of the third aspect. .

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

In a fifth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, wherein the program is executed by a processor to implement the method of the first aspect.

The above description is only an overview of the technical solutions of the present application, and the present application may be implemented in accordance with the content of the description so as to make the technical means of the present application more clearly understood, and the detailed description of the present application will be given below in order to make the above and other objects, features, and advantages of the present application more clearly understood.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 illustrates a schematic structural diagram of a power cell system provided by an embodiment of the present application;

FIG. 2 shows a schematic diagram of a second power battery system (in series) provided by an embodiment of the present application;

FIG. 3 is a schematic diagram showing the structure of a third power battery system (batteries in series) provided by an embodiment of the present application;

FIG. 4 illustrates a schematic structural diagram (cell series) of a fourth power cell system provided by an embodiment of the present application;

FIG. 5 is a schematic diagram illustrating a fifth power battery system according to an embodiment of the present disclosure (a voltage regulating module is provided);

FIG. 6 shows a schematic diagram of a sixth power battery system provided by an embodiment of the present application (batteries in parallel);

FIG. 7 shows a schematic diagram of a seventh power battery system provided by an embodiment of the present application (batteries in parallel);

FIG. 8 is a schematic diagram of an eighth power battery system provided by an embodiment of the present application (batteries in parallel);

FIG. 9 shows a schematic diagram of a ninth power battery system provided by an embodiment of the present application (with batteries in series and redundant switches);

FIG. 10 shows a schematic diagram of a tenth power battery system provided by an embodiment of the present application (with batteries in series and redundant switches);

FIG. 11 shows a schematic diagram of an eleventh power battery system provided by an embodiment of the present application (with the batteries in series and redundant switches);

FIG. 12 is a schematic diagram showing a twelfth power battery system provided by an embodiment of the present application (batteries in parallel and having redundant switches);

FIG. 13 is a schematic diagram showing a thirteenth power battery system provided in accordance with an embodiment of the present application (with parallel batteries and redundant switches);

fig. 14 is a schematic flow chart illustrating a battery control method according to an embodiment of the present application;

fig. 15 is a schematic structural diagram illustrating a battery control apparatus according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 17 is a schematic diagram of a storage medium provided in an embodiment of the present application.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. In the fields of electric traffic supply, military equipment, aerospace and the like, power is generally provided by a power battery, and specifically, electric energy of the power battery is converted into mechanical energy by a motor so as to drive electric equipment to operate.

The inventor has noted that the power battery may fail during daily use. Such as excessive battery temperature, excessive battery pressure, under-voltage, and low battery charge, among others. And the power battery is used as a power source, and once a fault occurs, the driving safety of a user is greatly influenced. In order to guarantee the personal safety of a user, in the prior art, once a power battery fault is found, a system can automatically or prompt the user to stop emergently, and the user needs to return the battery to a factory for detection so as to ensure the subsequent driving safety, but great inconvenience is caused to the trip of an owner.

However, the inventors have studied and found that a power battery, particularly a power battery applied to a large-sized electric device such as an electric vehicle and an electric airplane, generally includes a plurality of battery packs. When the battery fails, only part of the battery pack (or part of the battery cells) usually fails. If the connection between the battery pack with the fault and the driving module can be cut off when part of the battery packs have the fault, the power supply module only adopts the battery packs without the fault to supply power to the driving module, the safe use of the electric equipment can still be realized, the emergency stop is not needed, and the battery is waited to be returned to the factory for detection and then used.

Based on the above consideration, in order to solve the problem that when part of batteries are in fault, the batteries must be stopped emergently and returned to the factory for detection, which causes great inconvenience to the trip of the vehicle owner, the inventor designs a power battery system through intensive research, which comprises a power supply module, a driving module and a fault-tolerant module arranged between the power supply module and the driving module, wherein the fault-tolerant module can control the power supply module to supply power by adopting the battery pack which is not in fault when part of the battery packs of the power supply module are in fault.

So, through setting up fault-tolerant module, can be when partial battery trouble, in time break off the group battery of sending the trouble and drive module between be connected, make power module adopt the group battery that does not break down to continue to drive module power supply, still can realize consumer's safe handling, needn't emergency stop, wait for the battery to return factory's detection and go on using again to user's power consumption experience has greatly been improved.

The embodiment of the application also provides the electric equipment applying the power battery system, the power battery system provided by the application is applied to the electric equipment, when part of battery packs of the power supply module fails, the power supply module is controlled to supply power by adopting the battery packs which do not fail, and the electric equipment can be safely used.

The electric device can be, but is not limited to, an electric automobile, a ship, a spacecraft, an electric toy, an electric tool, an electric battery car, and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a power battery system 200 according to some embodiments of the present disclosure. As shown in fig. 1, the power battery system 200 includes a power supply module 210, a driving module 220 and a fault tolerance module 230, wherein the power supply module 210 includes at least two battery packs. The driving module 220 is connected to the power supply module 210, and is configured to convert the electrical energy provided by the power supply module 210 into mechanical energy. The fault tolerant module 230 is disposed between the power supply module 210 and the driving module 220, and is configured to control the power supply module 210 to supply power by using a battery pack that does not fail when a part of the battery packs fails.

The power supply module 210 may include a plurality of battery packs, and when some of the battery packs fail, the remaining battery packs that have not failed may still supply power to the driving module 220. Specifically, the plurality of battery packs may be connected in parallel or in series. Here, the parallel connection may be understood as two positive electrodes of the two battery packs being connected and two negative electrodes being connected. A series connection is understood to mean the connection of the positive pole of one of the two battery packs to the negative pole of the other battery pack.

It is understood that the number and the type of the battery packs are not particularly limited in this embodiment, and for example, the battery may be a ternary power battery, a lithium iron phosphate battery, a lithium titanate battery, a lead-acid battery, or the like. The number of the battery packs is usually equal to or greater than 2, and can be specifically set according to actual needs.

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

The driving module 220 may further include a heating circuit connected in parallel with the power supply module 210 for forming an alternately switched charging and discharging circuit with the power supply module 210 to heat the battery pack of the power supply module 210.

As shown in fig. 2 or 3, the heating circuit may be connected to the neutral line of the M-phase motor, and may include at least one upper leg and one lower leg. The upper bridge arm (or the lower bridge arm) of the M-phase inverter bridge arm and the lower bridge arm (or the upper bridge arm) of the heating circuit are all conducted, so that the battery, the inverter, the heating circuit and the motor form a charging circuit and a discharging circuit which are alternately switched, and the battery pack is charged and discharged to achieve self-heating of the battery.

The heating circuit may also include two-phase bridge arm circuits and an energy storage unit disposed between the two-phase bridge arms, as shown in fig. 4, and one end of the energy storage unit is connected to the upper bridge arm and the lower bridge arm of one of the two-phase bridge arms, and the other end is connected to the upper bridge arm and the lower bridge arm of the other phase bridge arm. The upper bridge arm of one phase of bridge arm and the lower bridge arm of the other phase of bridge arm are conducted, so that the battery, the two phase of bridge arms and the energy storage unit form a charging loop and a discharging loop which are alternately switched, and the battery is self-heated by charging and discharging the battery pack.

The energy storage unit is usually an inductance element, and the embodiment does not specifically limit the specific structure and number thereof.

The fault tolerant module 230 may be an integral structure, or may include a plurality of components that operate independently, and the specific structure is not specifically limited in this embodiment, as long as the connection between the battery pack that sends the fault and the driving module 220 can be disconnected, and the battery pack that does not have the fault and the driving module 220 can be conducted.

In this embodiment, by setting the fault-tolerant module 230, when a part of the batteries are in fault, the connection between the battery pack sending the fault and the driving module 220 is timely disconnected, so that the power supply module 210 continues to supply power to the driving module 220 by using the battery pack without the fault, and the safe use of the electric equipment can still be realized, the emergency stop is not needed, and the batteries are waited to be detected and reused in a factory, thereby greatly improving the power consumption experience of users.

In some embodiments, at least two battery packs are each connected in series; when a partial battery pack fails, the fault tolerant module 230 controls the failed battery pack to be disconnected from the driving module 220 and the non-failed battery pack, and controls the non-failed battery pack to be connected with the driving module 220.

When the battery packs are connected in series, if part of the battery packs fail, in order to avoid interference of the failed battery packs with the non-failed battery packs, it is necessary to disconnect not only the failed battery packs from the driving module 220 but also the failed battery packs from the non-failed battery packs. And maintains conduction between the non-failed battery pack and the driving module 220 so that the non-failed battery pack can supply power to the driving module 220.

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 for controlling the connection and disconnection between the first battery pack B1 and the driving module 220; the second control circuit is used for controlling the connection and disconnection between the second battery pack B2 and the driving module 220; the third control circuit is used for controlling the connection and disconnection between the first battery pack B1 and the second battery pack B2.

In this embodiment, three control circuits are provided for the first battery pack B1 and the second battery pack B2 connected in series, and are respectively used for controlling the on/off between the first battery pack B1 and the driving module 220, the on/off between the second battery pack B2 and the driving module 220, and the on/off between the two battery packs. In this way, when one of the battery packs fails, the three control circuits can respectively control the battery packs with failures to be disconnected from the driving module 220, the two battery packs to be disconnected, and the battery packs without failures to be connected with the driving module 220, so that the power supply module 210 only uses the battery packs without failures to perform failures. And the three control circuits have definite division of labor, are beneficial to respectively controlling the first battery pack B1 and the second battery pack B2, and are also convenient for subsequent maintenance and fault detection.

It should be noted that, in the present embodiment, whether the three control circuits are connected to each other is not limited as long as the control function can be realized.

As shown in fig. 2 to 4, the first control circuit may include a first switch K1, and the first switch K1 is disposed between the first battery pack B1 and the driving module 220. When the negative electrode of the first battery B1 is connected to the positive electrode of the second battery B2, one end of the first switch K1 is connected to the negative electrode of the first battery B1, and the other end is connected to the negative electrode of the second battery B2 and the first end of the driving module 220 in a collinear manner.

In this way, one end of the first switch K1 is connected to the negative electrode of the first battery B1, and the other end of the first switch K1 is connected to the negative electrode of the second battery B2 and the first end of the driving module 220 in a collinear manner. The first switch K1 is connected with the first battery pack B1 in series and connected with the second battery pack B2 in parallel, on-off between the first battery pack B1 and the driving module 220 can be achieved through on-off of the first switch K1, control logic is simple, and operation is convenient. And because the first switch K1 is connected in parallel with the second battery pack B2, the on-off between the second battery pack B2 and the driving module 220 is not affected, the first switch K1 controls the first battery pack B1 independently, and the safety and reliability of the whole power battery system 200 are improved.

The second control circuit comprises a second switch K2, and the second switch K2 is arranged between the second battery pack B2 and the driving module 220; when the negative electrode of the first battery B1 is connected to the positive electrode of the second battery B2, one end of the second switch K2 is connected to the positive electrode of the first battery, and the other end is connected to the positive electrode of the second battery B2 and the second end of the driving module 220 in a collinear manner.

Similar to the principle of the first switch K1, the second switch K2 is provided, and one end of the second switch K2 is connected to the anode of the second battery B2, and the other end is connected to the anode of the first battery B1 and the second end of the driving module 220 in a collinear manner. The second switch K2 is connected with the second battery pack B2 in series and connected with the first battery pack B1 in parallel, on-off between the second battery pack B2 and the driving module 220 can be achieved through on-off of the second switch K2, control logic is simple, and operation is convenient. And because the second switch K2 is connected with the first battery pack B1 in parallel, the on-off between the first battery pack B1 and the driving module 220 is not influenced, the second switch K2 can independently control the second battery pack B2, and the safety and reliability of the whole power battery system 200 can be improved.

The third control circuit comprises a third switch K3, and the third switch K3 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 B1, and the other end is connected to the positive electrode of the second battery B2. So, through set up third switch K3 between first group battery B1 and second group battery B2, be used for controlling the break-make between first group battery B1 and the second group battery B2 specially, simple structure, convenient operation can realize the independent control between first group battery B1 and the second group battery B2, more is favorable to improving the safe and reliable performance of whole power battery system 200.

In view of the fact that when the battery packs are connected in series, the remaining battery packs that have not failed are used for power supply, and the number of battery packs is reduced, which may result in a low voltage supplied to the driving module 220 by the power supply module 210, as shown in fig. 5, the power battery system 200 provided in this embodiment further includes a voltage regulating module. The voltage regulating module is arranged between the power supply module 210 and the driving module 220, and is used for increasing the voltage provided to the driving module 220 when part of battery packs of the power supply module 210 break down, so as to meet the high-voltage requirement of the whole vehicle and further improve the driving safety.

The voltage regulating module can comprise a voltage regulating circuit and an energy storage unit, and a discharging loop is formed by controlling the power supply module 210, the voltage regulating circuit and the energy storage unit, so that the power supply module 210 discharges electricity to the energy storage unit; and controlling the discharging circuit to be disconnected, and controlling the power supply module 210 and the energy storage unit to discharge to the driving module 220 at the same time.

This embodiment can control power module 210, voltage regulating circuit, energy storage unit earlier and constitute the circuit that discharges when partial group battery breaks down through setting up the voltage regulating module that includes voltage regulating circuit and energy storage unit, makes power module 210 discharge to the energy storage unit, and the energy storage unit then can the energy of storing. When the stored energy of the energy storage unit reaches a certain value (which may be set according to an actual situation, and this is not specifically limited in this embodiment), the discharging circuit may be controlled to be turned off (specifically, any element or switch on the circuit may be turned off), and then the energy storage unit and the battery pack that does not fail may supply power to the driving module 220 together, so as to compensate the voltage that the battery pack that does not fail provides to the driving module 220, thereby increasing the voltage provided to the driving module 220.

Specifically, the voltage regulating module may refer to the heating circuit shown in fig. 4, 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.

When the discharging loop is formed, the upper bridge arm of one of the two phase bridge arms of the voltage regulating circuit and the lower bridge arm of the other phase bridge arm can be controlled to be conducted, so that the power supply module 210, the voltage regulating circuit and the energy storage unit form the discharging loop. After the energy storage is completed, when the energy is discharged to the driving module 220, two upper bridge arms (or two lower bridge arms) of two phase bridge arms in the voltage regulating circuit may be controlled to be both turned on, so that the current provided by the power supply module 210 may be transmitted to the driving module 220 through the voltage regulating circuit and the energy storage unit.

It can be understood that the energy stored in the energy storage unit is limited, and after discharging for a period of time, energy storage needs to be performed again, and discharging is performed after energy storage is completed, and the operation is repeated in this way.

In some embodiments, the heating module shown in fig. 4 can be directly used as a voltage regulating module to simplify the overall structure, so that the voltage regulating process is more convenient, and the energy storage process can refer to the discharge process of the battery in the heating process. Specifically, the conduction ratio of the voltage regulating module can be controlled to adjust the stored energy of the energy storage unit and the compensated driving voltage of the energy storage unit, so that the power supply module 210 can still provide a relatively stable driving voltage when different numbers of battery packs fail.

In the present embodiment, only the voltage boosting function of the voltage regulating module is usually applied, but the module also has the voltage reducing function, and those skilled in the art can set the voltage as needed. For example, the energy storage unit and the motor form a loop, and the pressure of the driving module 220 may be reduced when the energy storage process is performed. In addition, the arrangement of the voltage regulating module is only a preferred embodiment of the present embodiment, and the present embodiment is not limited thereto, as long as the voltage provided to the driving module 220 can be increased.

In other embodiments, at least two battery packs are each connected in parallel. When a partial battery pack fails, the fault tolerant module 230 controls the failed battery pack to be disconnected from the driving module 220, and controls the non-failed battery pack to be connected to the driving module 220.

When the battery packs are connected in parallel, if part of the battery packs are in fault, the battery packs in fault do not interfere with the battery packs not in fault, and only the connection between the battery packs in fault and the driving module 220 needs to be disconnected, and the battery packs not in fault and the driving module 220 are kept in conduction, so that the battery packs in fault can not supply power to the driving module 220, and the battery packs not in fault can supply power to the driving module 220.

As shown in fig. 6 to 8, 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, where the fourth control circuit is used to control the connection and disconnection between the third battery B3 and the driving module 220; the fifth control circuit is used for controlling the connection and disconnection between the fourth battery B4 and the driving module 220.

In the present embodiment, for the parallel connection of the third battery pack B3 and the fourth battery pack B4, a fourth control circuit and a fifth control circuit are respectively provided, where one of the fourth control circuit and the fifth control circuit is used for controlling the on/off between the third battery pack B3 and the driving module 220, and the other is used for controlling 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 respectively control the battery pack with the failure to be disconnected from the driving module 220 and the battery pack without the failure to be connected to the driving module 220, so that the power supply module 210 only uses the battery pack without the failure to perform the failure. And the fourth control circuit and the fifth control circuit are clear in division of labor, are beneficial to respectively controlling the third battery pack B3 and the fourth battery pack B4, and are convenient for subsequent maintenance and fault detection.

As shown in fig. 6 to 8, the fourth control circuit may include a fourth switch K4, and the fourth switch K4 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 B3, and the other end is connected to the positive electrode of the fourth battery B4 and the second end of the driving module 220 in a collinear manner.

In this way, one end of the fourth switch K4 is connected to the positive electrode of the third battery B3, and the other end of the fourth switch K4 is connected to the positive electrode of the fourth battery B4 and the second end of the driving module 220 in a collinear manner. Make fourth switch K4 and third group battery B3 series connection, and with fourth group battery B4 parallel connection, through fourth switch K4's break-make, alright realize the break-make between third group battery B3 and drive module 220, control logic is simple, convenient operation. And because the fourth switch K4 is connected in parallel with the fourth battery pack B4, the on-off between the fourth battery pack B4 and the driving module 220 is not affected, the fourth switch K4 independently controls the third battery pack B3, and the safety and reliability of the entire power battery system 200 are improved.

The fifth control circuit comprises a fifth switch K5, and the fifth switch K5 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 B4, and the other end is connected to the positive electrode of the third battery B3 and the second end of the driving module 220 in a collinear manner.

Similar to the design of the fourth switch K4, one end of the fifth switch K5 is connected to the positive electrode of the fourth battery B4, and the other end of the fifth switch K5 is connected to the positive electrode of the third battery B3 and the second end of the driving module 220 in a collinear manner. The fifth switch K5 is connected with the fourth battery pack B4 in series and connected with the third battery pack B3 in parallel, on-off between the fourth battery pack B4 and the driving module 220 can be achieved through on-off of the fifth switch K5, control logic is simple, and operation is convenient. And because the fifth switch K5 is connected in parallel with the third battery pack B3, the on-off between the third battery pack B3 and the driving module 220 is not affected, the independent control of the fifth switch K5 on the fourth battery pack B4 is realized, and the improvement of the safety and reliability of the entire power battery system 200 is facilitated.

It can be understood that, when the battery packs of the power supply module 210 are all connected in parallel, even if part of the battery packs fails, the voltage supplied by the power supply module 210 to the driving module 220 is not affected, so that a voltage regulating module is not required. The heating module shown in fig. 8 may be used only for the battery self-heating process, and the energy transfer of the third battery B3.

In other embodiments, the fault tolerant module 230 may further include a sixth switch, which is disposed between the power supply module 210 and the driving module 220, and controls on/off between at least one battery pack and the driving module 220, so as to implement redundant control of the fault tolerant module 230, and further improve the safety and reliability of the power battery system 200.

The sixth switch may include, but is not limited to, the redundant switches K61, K62, K63, and K64 shown in fig. 9-13.

For the first battery pack B1 and the second battery pack B2 connected in series, as shown in fig. 9, the positive electrodes of the two battery packs are connected to the driving module 220 through different wires, and a redundant switch is respectively disposed between each battery pack and the driving module 220, that is, a switch K61 is disposed on the connection line between the first battery pack B1 and the driving module 220, and a switch K62 is disposed 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 controlled redundantly through the on-off of the switch K61 and the switch K62. When the first switch K1 or the second switch K2 fails, the switch K61 can control the on/off between the first battery pack B1 and the driving module 220, and the switch K62 can control the on/off between the second battery pack B2 and the driving module 220. To ensure that when the first battery B1 (or the second battery B2) fails, it can be disconnected from the driving module 220, and to maintain the conduction between the second battery B2 (or the first battery B1) and the driving module 220.

When the first battery pack B1 and the second battery pack B2 both operate normally, the first switch K1 and the second switch K2 can be controlled to be both opened, and the third switch K3, the switch K61 and the switch K62 can be controlled to be both closed, so that the first battery pack B1 and the second battery pack B2 supply power to the driving module 220 in a series connection manner. In the operation process, if the first battery pack B1 fails, the third switch K3 is turned off, and at least one of the first switch K1 and the switch K61 is turned off, so that the first battery pack B1 and the driving module 220 are disconnected. And closes the second switch K2 and the switch K62, so that the second battery B2 is conducted with the driving module 220. If the second battery B2 fails, the third switch K3 is turned off, and at least one of the second switch K2 and the switch K62 is turned off, so that the connection between the second battery B2 and the driving module 220 is disconnected. And closes the first switch K1 and the switch K61, so that the first battery pack B1 is conducted with the driving module 220.

For the first battery B1 and the second battery B2 connected in series, as shown in fig. 10, the positive poles of the two batteries may be connected to the driving module 220 through the same wire, and a redundant switch K61 may be provided on the wire. The redundancy switch K61 may simultaneously control the on/off between the first and second battery packs B1 and B2 and the driving module 220. In the operation process of the power battery system 200, the redundant switch K61 can be used as a normally closed switch, and when the first switch K1 or the second switch K2 breaks down, the redundant switch can be used as an emergency switch to break the whole circuit. If the first battery pack B1 or the second battery pack B2 fails, the switches connected in series with each other are controlled, and for a specific control process, reference may be made to the control process with the structure shown in fig. 9, which is not described herein again.

As for the first battery pack B1 and the second battery pack B2 connected in series, as shown in fig. 11, the positive electrodes of the two battery packs are connected to the driving module 220 through different conducting wires, and the two conducting wires are connected or disconnected through the switch K21, the switch K22 is disposed between the second battery pack B2 and the driving module 220, and the redundant switch K61 is disposed on the connection line between the first battery pack B1 and the driving module 220.

When the first battery pack B1 and the second battery pack B2 both operate normally, the first switch K1 may be controlled to be turned off, the switch K61 may be controlled to be turned off, and the third switch K3, the switch K21, and the switch K22 may be controlled to be turned on, so that the first battery pack B1 and the second battery pack B2 supply power to the driving module 220 in a serial connection manner. Alternatively, the first switch K1, the switch K21, and the switch K22 may be controlled to be open, and the third switch K3 and the switch K61 may be controlled to be closed. The first battery B1 and the second battery 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 and the switch K21 are turned off, and at least one of the first switch K1 and the switch K61 is turned off, so that the first battery pack B1 and the driving module 220 are disconnected. And switch K22 is closed, so that second battery B2 is conducted with driving module 220. Or the switch K21 and the switch K61 are closed, so that the second battery pack B2 and the driving module 220 can be conducted (transmitted through the energy storage unit). If the second battery B2 fails, the third switch K3, the switch K21, and the switch K22 are all turned off, and the second battery B2 and the driving module 220 are disconnected. And the first switch K1 and the switch K61 are both closed, so that the first battery pack B1 is conducted with the driving module 220.

For the third battery pack B3 and the fourth battery pack B4 connected in parallel, a redundant switch may be provided as shown in fig. 12 or fig. 13 (in fig. 12, when both battery packs are operating normally, both upper arms and both lower 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). Fig. 12 shows one mode of arrangement of the redundancy switch K63 of the third battery B3, and fig. 13 shows one mode of arrangement of the redundancy switch K64 of the fourth battery B4.

The switch K63 may control the connection between the third battery B3 and the driving module 220 together with the fourth switch K4. The switch 64 may control the connection between the fourth battery B4 and the driving module 220 in cooperation with the fifth switch K5. When the third battery pack B3 malfunctions, the switch K63 may be opened from any one of the fourth switches K4, and both the switch K64 and the fifth switch K5 may be closed. When the fourth battery pack B4 malfunctions, the switch K64 may be opened from any one of the fifth switches K5, and both the switch K63 and the fourth switch K4 may be closed.

It should be noted that the settings 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 some embodiments listed in this embodiment, and this embodiment is not limited thereto as long as the above control functions for the two battery packs can be realized. In addition, in the present embodiment, the connection between the negative electrode of the first battery B1 and the positive electrode of the second battery B2 is not limited, and the positive electrode of the first battery B1 and the negative electrode of the second battery B2 may be connected.

In other embodiments, the power battery system 200 further includes a pre-charge module disposed between the power supply module 210 and the driving module 220 for enabling the power battery system 200 to provide a predetermined high voltage to the vehicle. The high-pressure process on the whole vehicle is realized before the running power is provided for the whole vehicle.

The voltage value of the pre-charging high voltage may be slightly lower than the voltage value when the entire vehicle runs, and may be specifically set according to the actual situation, which is not specifically limited in this embodiment.

As shown in fig. 9-13, the pre-charge module may include a seventh switch K7, an eighth switch K8 and a pre-charge resistor R1; the eighth switch K8 and the pre-charge resistor R1 are connected in series and are both connected in parallel with the seventh switch K7.

When high voltage is applied 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 loop formed by connecting the power supply module 210 and the capacitor with each other and between the eighth switch K8 and the pre-charging resistor R1 in series can store electricity for the capacitor until a difference value between a first voltage of the seventh switch K7 close to the battery side and a second voltage of the seventh switch K7 close to the motor side is smaller than a preset voltage difference, and the process can be understood as a capacitor electricity storage process, so that the capacitor has certain capacity, and the stability of the whole circuit can be improved. And the pre-charging resistor R1 is arranged in the loop, so that the short circuit of the loop and the damage to the capacitor can be prevented. And then the seventh switch K7 is controlled to be switched on and the eighth switch K8 is controlled to be switched off, so that the power battery system 200 provides preset high voltage for the vehicle, and the high voltage on the whole vehicle is completed.

It should be noted that, in this embodiment, as shown in fig. 9 to 13, the precharging module is not limited to be provided at the negative electrode of the battery pack, but may be provided at the positive electrode of the battery pack, or the redundant switch K61 may be directly used as the eighth switch K8, as long as the precharging process can be implemented.

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 may be relays, MOS transistors, IGBT transistors, or the like, and the specific structure and number of the switches are not specifically limited in this embodiment, as long as the above control function can be realized by turning on and off the switches.

Based on the same concept of the power battery system, the present embodiment further provides a battery control method applied to the power battery system of any of the above embodiments, as shown in fig. 14, the method includes:

step S1, in the process that the power supply module supplies power to the driving module, whether the battery pack has faults or not is determined.

The method can be applied to a controller of a whole vehicle domain or a battery management system, which is not specifically limited in this embodiment as long as the battery control method can be implemented. For the sake of understanding, the following description will be made in detail by taking the battery management system as an example.

In some embodiments, determining whether there is a battery pack failure may include the following processes: collecting battery parameters of each battery monomer in the power supply module, wherein the battery parameters comprise at least one of temperature, current, voltage and electric quantity of the battery monomer; and determining whether the battery pack has a fault according to the battery parameters.

In view of the various expression forms of the battery faults, in the embodiment, the battery management system can acquire parameters such as the temperature, the current, the voltage, the electric quantity and the like of each battery cell in the power supply module in real time, and judge whether the battery pack is in fault or not at least according to one of the parameters, and when one of the parameters is abnormal, judge that the battery cell is in fault, and then the battery pack where the battery cell is located is in fault. When the method determines whether the battery pack is in fault, the method can directly acquire the parameters acquired by the battery management system in real time and directly judge, so that the efficiency of the battery control method is improved.

Specifically, determining whether there is a failure of the battery pack according to the battery parameters may include the following processes: determining whether a battery monomer with battery parameters meeting preset fault conditions exists; if so, determining the battery pack to which the single battery meeting the preset fault condition belongs as the battery pack with the fault.

The above-mentioned fault conditions may include, but are not limited to, too high or too low battery temperature, too high or too low battery current, too high or too low battery voltage, too low battery capacity, etc., and it may be determined that the battery pack has a fault as long as one of the conditions is met. Therefore, various battery parameters are detected, whether the battery breaks down or not is judged based on the battery parameters and the preset fault conditions, and the accuracy of fault detection can be improved.

And S2, if so, controlling the power supply module to adopt the battery pack which does not have faults to supply power through the fault-tolerant module.

the battery pack that adopts not trouble to supply power through fault-tolerant module control power module includes:

the fault-tolerant module controls the battery pack with the fault to be disconnected with the driving module and the battery pack without the fault, controls the battery pack without the fault to be connected with the driving module, and enables the power supply module to adopt the battery pack without the fault to supply power.

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

under the condition that the first battery pack B1 has a fault, the first control circuit controls the first battery pack B1 to be disconnected with the driving module, the third control circuit controls the first battery pack B1 to be disconnected with the second battery pack B2, and the second control circuit controls the second battery pack B2 to be connected with the driving module, so that the power supply module adopts the second battery pack B2 for supplying power;

under the condition that the second battery pack B2 has a fault, the second control circuit controls the second battery pack B2 to be disconnected with the driving module, the third control circuit controls the second battery pack B2 to be disconnected with the first battery pack B1, and the first control circuit controls the first battery pack B1 to be connected with the driving module, so that the power supply module adopts the first battery pack B1 for supplying power.

In some embodiments, the first control circuit includes a first switch disposed between the first battery B1 and the driving module;

the first battery pack B1 is controlled to be disconnected or connected with the driving module through a first control circuit, and the control method comprises the following steps:

under the condition that the first battery pack B1 has a fault, the first switch is switched off, and the first battery pack B1 is controlled to be switched off from the driving module;

when the second battery pack B2 has a fault, the first switch is closed, and conduction between the first battery pack B1 and the driving module is controlled.

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

the second battery pack B2 is controlled to be disconnected or connected with the driving module through a second control circuit, and the method comprises the following steps:

under the condition that the second battery pack B2 has a fault, the second switch is switched off, and the second battery pack B2 is controlled to be switched off from the driving module;

and when the first battery pack B1 has a fault, the second switch is closed, and the conduction between the second battery pack B2 and the driving module is controlled.

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

controlling the disconnection between the first battery pack B1 and the second battery pack B2 by a third control circuit includes:

when first battery B1 or second battery B2 malfunctions, the third switch is turned off, and disconnection between the first battery and second battery B2 is controlled.

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

the fault-tolerant module is used for controlling the disconnection between the battery pack with the fault and the driving module and controlling the conduction between the battery pack without the fault and the driving module, so that the power supply module adopts the battery pack without the fault to supply power.

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

and under the condition that the fourth battery pack has a fault, the fifth control circuit controls the fourth battery pack to be disconnected from the driving module, and the fourth control circuit controls the third battery pack to be connected with the driving module, so that the power supply module supplies power by adopting the third battery pack.

the fourth control circuit controls the disconnection or the conduction between the third battery pack and the driving module, and the method comprises the following steps:

under the condition that the third battery pack has a fault, the fourth switch is switched off, and the third battery pack is controlled to be switched off from the driving module;

and under the condition that the fourth battery pack has a fault, closing the fourth switch and controlling the conduction between the third battery pack and the driving module.

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

the fifth control circuit controls the fourth battery pack to be disconnected or connected with the driving module, and the method comprises the following steps:

In some embodiments, the fault tolerant module further comprises a sixth switch, which is arranged between the power supply module and the driving module and controls the on-off between the at least one battery pack and the driving module;

the battery pack that adopts not trouble through fault-tolerant module control power module supplies power, still includes:

the battery control method further includes:

the voltage supplied to the driving module is increased by the voltage regulating module.

increase the voltage that provides to the drive module through voltage regulation module includes:

controlling the power supply module, the voltage regulating circuit and the energy storage unit to form a discharging loop so that the power supply module discharges to the energy storage unit;

and the discharge loop 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.

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

control power module, voltage regulating circuit, energy storage unit constitute the circuit that discharges, include:

According to the battery control method provided by the embodiment, through the fault-tolerant module, when part of batteries are in fault, the connection between the battery pack sending the fault and the driving module is timely disconnected, so that the power supply module adopts the battery pack which does not have the fault to continuously supply power to the driving module, the safe use of the electric equipment can still be realized, the emergency stop is not needed, and the battery is waited to return to a factory for detection and then used, so that the power utilization experience of a user is greatly improved

It can be understood that, in this embodiment, based on the same concept of the power battery system, various embodiments and advantageous effects of the power battery system are also applicable to the battery control method provided in this embodiment, and are not described herein again.

Based on the same concept of the power battery system, the present embodiment further provides a battery control device for executing the battery control method, as shown in fig. 15, the battery control device including:

and the fault-tolerant control module is used for controlling the power supply module to adopt the battery pack which does not have a fault to supply power through the fault-tolerant module if the fault-tolerant control module is true.

Specifically, the battery control device may be a controller of a whole vehicle domain, a battery management system, or another specially-configured control device, and the embodiment does not specifically limit the specific structure of the battery control device, as long as the control method can be implemented.

It can be understood that, in this embodiment, based on the same concept of the power battery system, various embodiments and advantageous effects of the power battery system are also applicable to the battery control device provided in this embodiment, and are not described herein again.

Based on the same concept of the power battery system, the embodiment further provides a power utilization device, which comprises the power battery system of any one of the above embodiments and the above battery control device.

Specifically, the electric device may be an electric vehicle, an electric toy, a ship, a spacecraft, or the like, which may have a power battery, a motor, and a motor inverter.

It can be understood that, in this embodiment, based on the same concept of the power battery system, various embodiments and advantageous effects of the power battery system are also applicable to the power-using device provided in this embodiment, and are not described herein again.

The embodiment of the application also provides electronic equipment for executing the battery control method. The electronic device may be a whole vehicle domain controller or a battery management system, or other specially configured controller. Please refer to fig. 16, which illustrates a schematic diagram of an electric device according to some embodiments of the present application. As shown in fig. 16, the electric device 40 includes: a processor 400, a memory 401, a bus 402 and a communication interface 403, wherein the processor 400, the communication interface 403 and the memory 401 are connected through the bus 402; the memory 401 stores a computer program that can be executed on the processor 400, and the power battery system provided in any of the foregoing embodiments of the present application is executed when the processor 400 executes the computer program.

The Memory 401 may include a high-speed Random Access Memory (RAM) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the apparatus 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, a wide area network, a local network, a metropolitan area network, etc. may be used.

Bus 402 can be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 401 is used for storing a program, and the processor 400 executes the program after receiving an execution instruction, and the power battery system disclosed in any of the foregoing embodiments of the present application may be applied to the processor 400, or implemented by the processor 400.

Processor 400 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware integrated logic circuits or software in the processor 400. The Processor 400 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. 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 method in combination with the hardware.

The power utilization equipment provided by the embodiment of the application and the power battery system provided by the embodiment of the application have the same inventive concept and have the same beneficial effects as the method adopted, operated or realized by the power utilization equipment.

Referring to fig. 17, the computer readable storage medium is shown as an optical disc 30, on which a computer program (i.e., a program product) is stored, and when the computer program is executed by a processor, the computer program will execute the power battery system provided in any of the foregoing embodiments.

It should be noted that examples of the computer-readable storage medium 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 and magnetic storage media, which are not described in detail herein.

The computer readable storage medium provided by the above embodiments of the present application has the same beneficial effects as the method adopted, operated or implemented by the application program stored in the computer readable storage medium, based on the same inventive concept as the power battery system provided by the embodiments of the present application.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A power battery system, comprising:

a power supply module including at least two battery packs;

the driving module is connected with the power supply module and used for converting the electric energy provided by the power supply module into mechanical energy;

and the fault-tolerant module is arranged between the power supply module and the driving module and is used for controlling the power supply module to adopt the battery pack which does not have a fault to supply power when part of the battery packs have a fault.

2. The power battery system of claim 1, wherein the at least two battery packs are each connected in series;

when part of the battery packs have faults, the fault-tolerant module controls the battery packs with the faults to be disconnected with the driving module and the battery packs without the faults and controls the battery packs without the faults to be connected with the driving module.

3. The power battery system of claim 2, wherein the power module comprises a first battery pack and a second battery pack connected in series;

the fault-tolerant module comprises a first control circuit, a second control circuit and a third control circuit, wherein the first control circuit is used for controlling the connection and disconnection between the first battery pack and the driving module; the second control circuit is used for controlling the connection and disconnection between the second battery pack and the driving module; the third control circuit is used for controlling the connection and disconnection between the first battery pack and the second battery pack.

4. The power battery system of claim 3, wherein the first control circuit comprises a first switch disposed between the first battery pack and the drive module;

the negative pole of the first battery pack is connected with the positive pole of the second battery pack, one end of the first switch is connected with the negative pole of the first battery pack, and the other end of the first switch is in collinear connection with the negative pole of the second battery pack and the first end of the driving module.

5. The power battery system of claim 3, wherein the second control circuit comprises a second switch disposed between the second battery pack and the drive module;

the negative pole of the first battery pack is connected with the positive pole of the second battery pack, one end of the second switch is connected with the positive pole of the first battery, and the other end of the second switch is in collinear connection with the positive pole of the second battery pack and the second end of the driving module.

6. The power battery system of claim 3, wherein the third control circuit comprises a third switch disposed between the first battery pack and the second battery pack;

one end of the third switch is connected with the negative electrode of the first battery pack, and the other end of the third switch is connected with the positive electrode of the second battery pack.

7. The power battery system of claim 2, further comprising a voltage regulation module disposed between the power module and the drive module for increasing the voltage provided to the drive module in the event of a failure of a portion of the battery packs of the power module.

8. The power battery system of claim 7, wherein the voltage regulating module comprises a voltage regulating circuit and an energy storage unit, and the power supply module discharges electricity to the energy storage unit by controlling the power supply module, the voltage regulating circuit and the energy storage unit to form a discharge loop; and controlling the discharge loop to be disconnected, and controlling the power supply module and the energy storage unit to discharge to the driving module at the same time.

9. The power battery system of claim 8, wherein the voltage regulating circuit comprises two phases of bridge arms, one end of the energy storage unit is connected with the upper bridge arm and the lower bridge arm of one phase of bridge arm, and the other end of the energy storage unit is connected with the upper bridge arm and the lower bridge arm of the other phase of bridge arm.

10. The power battery system of claim 1, wherein the at least two battery packs are each connected in parallel;

when part of the battery packs have faults, the fault-tolerant module controls the battery packs with the faults to be disconnected with the driving module, and controls the battery packs without the faults to be connected with the driving module.

11. The power battery system of claim 10, wherein the power module comprises a third battery pack and a fourth battery pack connected in parallel;

the fault-tolerant module comprises a fourth control circuit and a fifth control circuit, and the fourth control circuit is used for controlling the connection and disconnection between the third battery pack and the driving module; the fifth control circuit is used for controlling the connection and disconnection between the fourth battery pack and the driving module.

12. The power battery system of claim 11, wherein the fourth control circuit comprises a fourth switch disposed between the third battery pack and the drive module;

one end of the fourth switch is connected with the anode of the third battery pack, and the other end of the fourth switch is in collinear connection with the anode of the fourth battery pack and the second end of the driving module.

13. The power battery system of claim 11, wherein the fifth control circuit comprises a fifth switch disposed between the fourth battery pack and the drive module;

one end of the fifth switch is connected with the anode of the fourth battery pack, and the other end of the fifth switch is in collinear connection with the anode of the third battery pack and the second end of the driving module.

14. The power battery system of any of claims 1-13, wherein the fault tolerant module further comprises a sixth switch disposed between the power module and the drive module that controls on and off between at least one battery pack and the drive module.

15. The power battery system according to any one of claims 1 to 14, wherein the driving module comprises 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 both connected in parallel with the power supply module, each winding of the M-phase motor is connected with each bridge arm of the M-phase inverter bridge arm in a one-to-one correspondence manner, and a neutral line of the M-phase motor is connected with the heating circuit.

16. The power battery system of any of claims 1-15, further comprising a pre-charge module disposed between the power module and the drive module for causing the power battery system to provide a predetermined high voltage to the vehicle.

17. The power battery system of claim 16, wherein the pre-charge module comprises a seventh switch, an eighth switch, and a pre-charge 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 it is applied to a power battery system according to any one of claims 1-17, said method comprising:

in the process that the power supply module supplies power to the driving module, whether a battery pack fails or not is determined;

19. The battery control method according to claim 18, wherein at least two battery packs of the power supply module are each connected in series;

20. The battery control method according to claim 19, wherein the power supply module includes a first battery pack and a second battery pack connected in series; the fault-tolerant module comprises a first control circuit, a second control circuit and a third control circuit;

21. The battery control method according to claim 20, wherein the first control circuit includes a first switch provided between the first battery pack and the drive module;

22. The battery control method according to claim 20, wherein the second control circuit includes a second switch provided between the second battery pack and the drive module;

under the condition that the second battery pack has a fault, the second switch is switched off, and the second battery pack is controlled to be switched off from the driving module;

23. The battery control method according to claim 20, wherein the third control circuit includes a third switch provided between the first battery pack and the second battery pack;

24. The battery control method according to claim 18, wherein at least two battery packs of the power supply module are each connected in parallel;

25. The battery control method according to claim 18, wherein the power supply module includes a third battery pack and a fourth battery pack connected in parallel;

26. The battery control method according to claim 25, wherein the fourth control circuit includes a fourth switch provided between the third battery pack and the drive module;

27. The battery control method according to claim 25, wherein the fifth control circuit comprises a fifth switch disposed between the fourth battery pack and the drive module;

28. The battery control method according to any one of claims 18 to 27, wherein the fault tolerant module further comprises a sixth switch, the sixth switch is disposed between the power supply module and the driving module, and controls on/off between at least one battery pack and the driving module;

29. The battery control method according to claim 18, wherein the determining whether there is a failure of the battery pack includes:

30. The battery control method of claim 29, wherein determining whether there is a battery pack failure based on the battery parameter comprises:

determining whether a single battery with battery parameters meeting preset fault conditions exists;

31. The battery control method of claim 18, wherein the power battery system further comprises a voltage regulation module disposed between the power module and the drive module;

the battery control method further includes:

32. The battery control method according to claim 31, wherein the voltage regulating module comprises a voltage regulating circuit and an energy storage unit;

33. The battery control method according to claim 32, wherein the voltage regulating circuit comprises two-phase bridge arms, one end of the energy storage unit is connected with an upper bridge arm and a lower bridge arm of one of the two-phase bridge arms, and the other end of the energy storage unit is connected with an upper bridge arm and a lower bridge arm of the other one of the two-phase bridge arms;

34. A battery control apparatus, comprising:

35. A power consumption apparatus comprising a power cell system according to any one of claims 1 to 17 and a cell control device according to claim 34.

36. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method of any one of claims 18-33.

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