Power battery management method and device and vehicle
阅读说明：本技术 动力电池管理方法、装置和车辆 (Power battery management method and device and vehicle ) 是由 饶航 赵田丽 于 2019-04-01 设计创作，主要内容包括：本公开涉及一种动力电池管理方法、装置和车辆,应用于车辆,车辆上设置有第一控制器,第二控制器和电池管理系统BMS,第一控制器与第二控制器按照第一连接方式连接,第一控制器与车辆的动力电池按照第二连接方式连接,第一控制器和第二控制器,分别与BMS按照第三连接方式连接,该方法包括：通过第一控制器获取BMS的第一工作状态,当第一工作状态为异常时,通过第一控制器向第二控制器发送控制信息,在接收到控制信息后,通过第二控制器根据控制信息获取动力电池的状态信息。本公开通过将第二控制器作为BMS的备份,在BMS不能正常工作的情况下,替代BMS监测动力电池,能够控制风险,降低安全隐患。(The utility model relates to a power battery management method, device and vehicle, be applied to the vehicle, be provided with first controller, second controller and battery management system BMS on the vehicle, first controller is connected according to the first connected mode with the second controller, and first controller is connected according to the second connected mode with the power battery of vehicle, and first controller and second controller are connected according to the third connected mode with BMS respectively, and the method comprises: the first working state of the BMS is obtained through the first controller, when the first working state is abnormal, control information is sent to the second controller through the first controller, and after the control information is received, the state information of the power battery is obtained through the second controller according to the control information. This is disclosed through the backup with the second controller as BMS, under the condition that BMS can not normally work, replaces BMS monitoring power battery, can control the risk, reduces the potential safety hazard.)
1. A power battery management method applied to a vehicle, wherein the vehicle is provided with a first controller, a second controller and a battery management system BMS, the first controller is connected with the second controller according to a first connection manner, the first controller is connected with a power battery of the vehicle according to a second connection manner, and the first controller and the second controller are respectively connected with the BMS according to a third connection manner, the method comprising:
acquiring a first working state of the BMS through the first controller;
when the first working state is abnormal, sending control information to the second controller through the first controller;
and after the control information is received, acquiring the state information of the power battery through the second controller according to the control information.
2. The method according to claim 1, wherein after the obtaining, by the second controller, the state information of the power battery according to the control information, the method further comprises:
sending, by the second controller, the status information to the first controller;
determining, by the first controller, whether the power battery is abnormal according to the state information;
when the power battery is abnormal, first prompt information is sent through the first controller, and the first prompt information is used for prompting a user that the power battery is abnormal.
3. The method of claim 1, further comprising:
and when the first working state is abnormal, the power battery is controlled to be powered on or powered off through the first controller.
4. The method of claim 1, further comprising:
when the first working state is normal, sending a power-on command or a power-off command to the BMS through the first controller;
and controlling the power battery to be powered on or powered off by the BMS according to the power-on command or the power-off command.
5. The method of claim 1, further comprising:
when the first working state is normal, acquiring a second working state of the first controller through the second controller, wherein the second working state is used for indicating whether the first controller is abnormal or not;
and when the second working state is abnormal, sending second prompt information through the second controller, wherein the second prompt information is used for prompting a user that the first controller is abnormal.
6. A power battery management apparatus, for application to a vehicle, the apparatus comprising: the system comprises a first controller, a second controller and a battery management system BMS, wherein the first controller is connected with the second controller according to a first connection mode, the first controller is connected with a power battery of the vehicle according to a second connection mode, and the first controller and the second controller are respectively connected with the BMS according to a third connection mode;
the first controller is used for acquiring a first working state of the BMS;
the first controller is further configured to send control information to the second controller when the first operating state is abnormal;
and the second controller is used for acquiring the state information of the power battery according to the control information after receiving the control information.
7. The apparatus of claim 6, wherein the second controller is further configured to send the status information to the first controller after the obtaining of the status information of the power battery according to the control information;
the first controller is further used for determining whether the power battery is abnormal or not according to the state information;
the first controller is further used for sending first prompt information when the power battery is abnormal, and the first prompt information is used for prompting a user that the power battery is abnormal.
8. The apparatus of claim 6, wherein the first controller is further configured to control the power battery to power up or power down when the first operating state is abnormal.
9. The apparatus of claim 6, wherein the first controller is further configured to send a power-up command or a power-down command to the BMS when the first operating state is normal;
and the BMS is used for controlling the power battery to be powered on or powered off according to the power-on command or the power-off command.
10. The apparatus of claim 6, wherein the second controller is further configured to obtain a second operating status of the first controller when the first operating status is normal, and the second operating status is used to indicate whether the first controller is abnormal;
the second controller is further configured to send a second prompt message when the second working state is abnormal, where the second prompt message is used to prompt a user that the first controller is abnormal.
11. A vehicle characterized in that it comprises a power battery management device according to any one of claims 6-10.
Technical Field
The disclosure relates to the field of vehicle control, in particular to a power battery management method and device and a vehicle.
Background
Under the current situation of paying attention to sustainable development, the green and environment-friendly electric automobile is widely applied. In order to ensure that the power battery of the electric Vehicle can operate safely and efficiently, a BMS (battery management System) is generally installed on the electric Vehicle, and the BMS is an important bridge connecting the electric Vehicle and the power battery and is mainly used for monitoring the state of the power battery and feeding back related information to a VCU (Vehicle Control Unit). During the driving of the electric vehicle, if the BMS does not work properly, the electric vehicle may be immediately powered off or may not be powered off. In the prior art, the VCU is mainly used for directly controlling the power battery to be powered on or powered off, but whether abnormal conditions such as undervoltage and overhigh temperature exist in the power battery or not can not be monitored, and potential safety hazards still exist.
Disclosure of Invention
The purpose of the disclosure is to provide a power battery management method, a power battery management device and a vehicle, which can solve the problem that the internal condition of a power battery cannot be monitored when an electric vehicle cannot normally work in a BMS (battery management system) in the prior art.
In order to achieve the above object, according to a first aspect of the embodiments of the present disclosure, there is provided a power battery management method applied to a vehicle, the vehicle being provided with a first controller, a second controller and a battery management system BMS, the first controller being connected to the second controller in a first connection manner, the first controller being connected to a power battery of the vehicle in a second connection manner, the first controller and the second controller being respectively connected to the BMS in a third connection manner, the method comprising:
acquiring a first working state of the BMS through the first controller;
when the first working state is abnormal, sending control information to the second controller through the first controller;
and after the control information is received, acquiring the state information of the power battery through the second controller according to the control information.
Optionally, after the obtaining, by the second controller, the state information of the power battery according to the control information, the method further includes:
sending, by the second controller, the status information to the first controller;
determining, by the first controller, whether the power battery is abnormal according to the state information;
when the power battery is abnormal, first prompt information is sent through the first controller, and the first prompt information is used for prompting a user that the power battery is abnormal.
Optionally, the method further comprises:
and when the first working state is abnormal, the power battery is controlled to be powered on or powered off through the first controller.
Optionally, the method further comprises:
when the first working state is normal, sending a power-on command or a power-off command to the BMS through the first controller;
and controlling the power battery to be powered on or powered off by the BMS according to the power-on command or the power-off command.
Optionally, the method further comprises:
when the first working state is normal, acquiring a second working state of the first controller through the second controller, wherein the second working state is used for indicating whether the first controller is abnormal or not;
and when the second working state is abnormal, sending second prompt information through the second controller, wherein the second prompt information is used for prompting a user that the first controller is abnormal.
According to a second aspect of the embodiments of the present disclosure, there is provided a power battery management apparatus applied to a vehicle, the apparatus including: the system comprises a first controller, a second controller and a battery management system BMS, wherein the first controller is connected with the second controller according to a first connection mode, the first controller is connected with a power battery of the vehicle according to a second connection mode, and the first controller and the second controller are respectively connected with the BMS according to a third connection mode;
the first controller is used for acquiring a first working state of the BMS;
the first controller is further configured to send control information to the second controller when the first operating state is abnormal;
and the second controller is used for acquiring the state information of the power battery according to the control information after receiving the control information.
Optionally, the second controller is further configured to send the state information to the first controller after the state information of the power battery is obtained according to the control information;
the first controller is further used for determining whether the power battery is abnormal or not according to the state information;
the first controller is further used for sending first prompt information when the power battery is abnormal, and the first prompt information is used for prompting a user that the power battery is abnormal.
Optionally, the first controller is further configured to control the power battery to power up or power down when the first operating state is abnormal.
Optionally, the first controller is further configured to send a power-on command or a power-off command to the BMS when the first operating state is normal;
and the BMS is used for controlling the power battery to be powered on or powered off according to the power-on command or the power-off command.
Optionally, the second controller is further configured to obtain a second working state of the first controller when the first working state is normal, where the second working state is used to indicate whether the first controller is abnormal;
the second controller is further configured to send a second prompt message when the second working state is abnormal, where the second prompt message is used to prompt a user that the first controller is abnormal.
According to a third aspect of the embodiments of the present disclosure, there is provided a vehicle on which the power battery management apparatus of the second aspect is provided.
Through the technical scheme, the first working state of the BMS is firstly acquired through the first controller in the disclosure, when the first working state is abnormal, the first controller sends control information to the second controller, and after the second controller receives the control information, the second controller acquires the state information of the power battery according to the control information. This is disclosed through the backup with the second controller as BMS, under the condition that BMS can not normally work, replaces BMS monitoring power battery, can control the risk, reduces the potential safety hazard.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a power cell management method according to an exemplary embodiment.
FIG. 2 is a flow chart illustrating another power cell management method according to an exemplary embodiment.
FIG. 3 is a flow chart illustrating another power cell management method according to an exemplary embodiment.
FIG. 4 is a flow chart illustrating another power cell management method according to an exemplary embodiment.
FIG. 5 is a flow chart illustrating yet another power cell management method according to an exemplary embodiment.
FIG. 6 is a block diagram illustrating a power cell management apparatus according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Before introducing the power battery management method, device and vehicle provided by the present disclosure, an application scenario related to various embodiments of the present disclosure is first introduced. The application scenario may include a vehicle provided with a first controller, a second controller and a battery management system BMS, where the vehicle may be any vehicle using a power battery as an energy source, such as an electric vehicle, not limited to a pure electric vehicle or a hybrid electric vehicle, but also an electric train or an electric bicycle.
FIG. 1 is a flow chart illustrating a power cell management method according to an exemplary embodiment. As shown in fig. 1, the vehicle is provided with a first controller, a second controller and a battery management system BMS, the first controller is connected with the second controller according to a first connection mode, the first controller is connected with a power battery of the vehicle according to a second connection mode, and the first controller and the second controller are respectively connected with the BMS according to a third connection mode.
The first controller and the second controller may be two different VCUs, or may be other devices capable of monitoring the BMS and the power battery. The first Controller and the second Controller are connected according to a first connection manner, so that the first Controller and the second Controller CAN transmit data, and the first connection manner may be, for example, connection via a CAN (Controller area Network, chinese: Controller area Network) bus or a LIN (Local Interconnect Network, chinese: Local Interconnect Network) bus, or connection via an SPI (Serial Peripheral Interface, chinese: Serial Peripheral Interface), or connection via a hard wire. The first controller is connected with a power battery of the vehicle according to a second connection mode, and the second connection mode can be a hard wire connection mode, so that the first controller can directly control the power battery to be powered on or powered off. The first controller and the second controller are respectively connected with the BMS according to a third connection mode, the third connection mode CAN be through a CAN bus, the first controller and the second controller are both connected with the BMS through the CAN bus, but the first controller and the second controller CAN be respectively connected with the BMS through two CAN buses, for example, the first controller CAN be set to be connected with the BMS through a CANA bus, and the second controller is connected with the BMS through a CANB bus.
It should be noted that, when the first controller disposed on the vehicle is a dual-core or multi-core VCU, the functions of the first controller and the second controller may be respectively implemented by two different CPUs (english: Central Processing Unit, chinese: Central Processing Unit) in the dual-core or multi-core VCU, that is, the first controller and the second controller may be respectively replaced by two different CPUs in the dual-core or multi-core VCU.
The method comprises the following steps:
in
In
In
Illustratively, the first controller communicates with the BMS through a CANA bus connection to acquire a first operating state of the BMS, and when the first operating state of the BMS acquired by the first controller is abnormal, the first controller transmits control information to the second controller. The manner of determining whether the first operating state is abnormal may be determined by judging a communication condition between the first controller and the BMS, judging that the first operating state of the BMS is abnormal (e.g., BMS failure or uncontrolled) when the first controller and the BMS cannot normally communicate or the communication data analysis is incorrect, and judging that the first operating state of the BMS is normal when the first controller and the BMS can normally communicate and the communication data analysis is normal. After receiving the control information, the second controller obtains the state information of the power battery according to the control information, for example, the state information of the power battery may be obtained by first calling backup software of the BMS pre-stored in the second controller to switch the monitoring state of the second controller to the transceiving state (the monitoring state is a state in which the second controller obtains the state information of the power battery collected by the BMS through the CANB bus, and the transceiving state is a state in which the second controller directly obtains the state information of the power battery and sends the state information to the first controller), so that the second controller can monitor the power battery instead of the BMS. The state information may include, for example: the battery pack comprises a single voltage, a module temperature, a total voltage of a power battery, a total current of the power battery and the like.
In summary, in the disclosure, a first operating state of the BMS is first obtained through the first controller, when the first operating state is abnormal, the first controller sends control information to the second controller, and after the second controller receives the control information, the second controller obtains state information of the power battery according to the control information. This is disclosed through the backup with the second controller as BMS, under the condition that BMS can not normally work, replaces BMS monitoring power battery, can control the risk, reduces the potential safety hazard.
FIG. 2 is a flow chart illustrating another power cell management method according to an exemplary embodiment. As shown in fig. 2, after
in
In
In
For example, the second controller may send the state information to the first controller after acquiring the state information of the power battery according to the control information, and the first controller may determine whether the power battery is abnormal according to the state information, for example, may determine whether the state information is within a preset range, and when the state information is not within the preset range, the first controller may determine that the power battery is abnormal, and when the state information is within the preset range, the first controller may determine that the power battery is normal. The preset range can be set according to the fluctuation range of the state information when the power battery of the vehicle of the same vehicle type works normally, the state information comprises four parameters including monomer voltage, module temperature, total voltage of the power battery and total current of the power battery, the normal ranges corresponding to the four parameters are respectively set, when any one of the four parameters exceeds the corresponding normal range, the power battery is determined to be abnormal, and when the four parameters are all in the corresponding normal ranges, the power battery is determined to be normal. When the power battery is abnormal, the first controller sends first prompt information, the first prompt information is used for prompting a user that the power battery is abnormal, and the first prompt information can be sent by displaying on a control interface (such as a central control display screen) of the vehicle or sending out a voice prompt through a loudspeaker on the vehicle.
FIG. 3 is a flow chart illustrating another power cell management method according to an exemplary embodiment. As shown in fig. 3, the method further comprises the steps of:
in
For example, the first controller is connected with a power battery of the vehicle through a hard wire, and when the first operating state is abnormal, the first controller may control the high-voltage relay to be opened or closed through the hard wire to control the power battery to be powered on or powered off (i.e., the first controller may control the power battery to output energy to the vehicle or stop outputting energy through the hard wire), so that the first controller may control the power battery to be powered on or powered off instead of the BMS. The power battery is controlled to be powered on or powered off, after the first controller determines that the first working state is abnormal, or after the second controller acquires the state information of the power battery according to the control information, which is not limited in this disclosure.
FIG. 4 is a flow chart illustrating another power cell management method according to an exemplary embodiment. As shown in fig. 4, the method further comprises the steps of:
in
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For example, when the first operating state is normal, the first controller may send a power-on command or a power-off command to the BMS through the CANA bus, and the BMS completes a power-on or power-off process according to the power-on command or the power-off command to control the power battery to power on or power off, that is, the BMS controls the power battery to output energy to the vehicle or stop outputting energy according to the power-on command or the power-off command. The second controller is connected with the BMS through the CANB bus, and can also acquire the state information of the power battery acquired by the BMS to be acquired as the backup of the state information, so that the stored state information is prevented from being lost due to the fact that the BMS cannot work normally.
FIG. 5 is a flow chart illustrating yet another power cell management method according to an exemplary embodiment. As shown in fig. 5, the method further comprises the steps of:
in
In
Illustratively, when the first working state is normal, the first controller can be monitored through the second controller, so that when the first controller is abnormal, a user can be reminded in time, and the safety risk is reduced. For example, the second controller may obtain a second working state of the first controller in real time, where the second working state is used to indicate whether the first controller is abnormal, and when the second working state is abnormal, the second controller sends a second prompt message. The manner of determining whether the second operating state is abnormal may be, for example, first obtaining key data (for example, acceleration data and braking data of the vehicle) of the first controller by the second controller, then determining whether the key data is within a preset range, when the key data is within the preset range, it is determined that the second operating state is normal, and when the key data is out of the preset range, it is determined that the second operating state is abnormal. The second prompt message is used for prompting the user that the first controller is abnormal, and the mode of sending the second prompt message can be display on a control interface (such as a central control display screen) of the vehicle or sending a voice prompt through a loudspeaker on the vehicle.
It should be noted that, the execution sequence of each step in any one of the power battery management methods shown in fig. 3 to fig. 5 is only an example of a specific embodiment in the present disclosure, and the specific execution sequence of each step in the present disclosure is not limited, for example, in the power battery management method shown in fig. 3, step 107 may be placed before
In summary, in the disclosure, a first operating state of the BMS is first obtained through the first controller, when the first operating state is abnormal, the first controller sends control information to the second controller, and after the second controller receives the control information, the second controller obtains state information of the power battery according to the control information. This is disclosed through the backup with the second controller as BMS, under the condition that BMS can not normally work, replaces BMS monitoring power battery, can control the risk, reduces the potential safety hazard.
FIG. 6 is a block diagram illustrating a power cell management apparatus according to an exemplary embodiment. As shown in fig. 6, applied to a vehicle, the apparatus 200 includes: the vehicle power management system comprises a first controller 201, a second controller 202 and a battery management system BMS 203, wherein the first controller 201 is connected with the second controller 202 according to a first connection mode, the first controller 201 is connected with a power battery 204 of the vehicle according to a second connection mode, and the first controller 201 and the second controller 202 are respectively connected with the BMS 203 according to a third connection mode.
And a first controller 201 for acquiring a first operating state of the BMS 203.
The first controller 201 is further configured to send control information to the second controller 202 when the first operating state is abnormal.
And the second controller 202 is used for acquiring the state information of the power battery 204 according to the control information after receiving the control information.
Optionally, the second controller 202 is further configured to send the state information to the first controller 201 after acquiring the state information of the power battery 204 according to the control information.
The first controller 201 is further configured to determine whether the power battery 204 is abnormal according to the state information.
The first controller 201 is further configured to send a first prompt message when the power battery 204 is abnormal, where the first prompt message is used to prompt a user that the power battery 204 is abnormal.
Optionally, the first controller 201 is further configured to control the power battery 204 to be powered on or powered off when the first operating state is abnormal.
Optionally, the first controller 201 is further configured to send a power-on command or a power-off command to the BMS 203 when the first operating state is normal.
And the BMS 203 for controlling the power battery 204 to be powered on or powered off according to the power-on command or the power-off command.
Optionally, the second controller 202 is further configured to obtain a second operating state of the first controller 201 when the first operating state is normal, where the second operating state is used to indicate whether the first controller 201 is abnormal.
The second controller 202 is further configured to send a second prompt message when the second operating state is abnormal, where the second prompt message is used to prompt the user that the first controller 201 is abnormal.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
In summary, in the disclosure, a first operating state of the BMS is first obtained through the first controller, when the first operating state is abnormal, the first controller sends control information to the second controller, and after the second controller receives the control information, the second controller obtains state information of the power battery according to the control information. This is disclosed through the backup with the second controller as BMS, under the condition that BMS can not normally work, replaces BMS monitoring power battery, can control the risk, reduces the potential safety hazard.
The present disclosure also relates to a vehicle on which a power battery management apparatus shown in fig. 6 is provided.
With regard to the power battery management apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated herein.
In summary, in the disclosure, a first operating state of the BMS is first obtained through the first controller, when the first operating state is abnormal, the first controller sends control information to the second controller, and after the second controller receives the control information, the second controller obtains state information of the power battery according to the control information. This is disclosed through the backup with the second controller as BMS, under the condition that BMS can not normally work, replaces BMS monitoring power battery, can control the risk, reduces the potential safety hazard.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.