CN112133971A - Battery device, and power-off control method and device for battery device - Google Patents
Battery device, and power-off control method and device for battery device Download PDFInfo
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- CN112133971A CN112133971A CN202010896952.1A CN202010896952A CN112133971A CN 112133971 A CN112133971 A CN 112133971A CN 202010896952 A CN202010896952 A CN 202010896952A CN 112133971 A CN112133971 A CN 112133971A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the application discloses a battery device, and a power-off control method and device of the battery device, which are used for solving the problem that the situation that a traditional battery pack high-voltage power-off system cannot accurately detect a battery pack in an electric automobile and further cannot solve the potential safety hazard problem of the electric automobile. The battery device includes: the battery comprises a battery shell and a battery module arranged in the battery shell; and a parameter sensor, a power-off actuator and a power-off controller are also arranged in the battery shell. The battery device enables the parameter sensor to collect parameter information of the battery module and disconnects the electrical connection relation of the battery module through the power-off controller and the power-off actuator. The battery device can more accurately acquire the parameter information of the battery module based on the built-in component, so that an accurate power-off strategy is executed on the battery module, and the potential safety hazard problem of the battery device is effectively solved.
Description
Technical Field
The invention relates to the technical field of safety protection of electric automobiles and power batteries, in particular to a battery device and a power-off control method and device of the battery device.
Background
Under the trends of electromotion, intellectualization, sharing and networking and stricter environmental protection requirements, the electric automobile is continuously developed, and the technology is mature day by day. For a new energy electric automobile, the safety performance of a power battery pack is a key index for measuring the performance of the automobile. When a vehicle encounters a condition of road bumping or even strong impact, the power battery pack is likely to have short circuit, electric leakage or temperature runaway phenomenon due to conditions such as extrusion, vibration and mechanical impact, and risks of fire and explosion exist. Therefore, the electric automobile is an important technical link for the high-voltage power-off protection of the power battery pack in collision and charging and discharging scenes.
In the prior art, the high-voltage power-off protection of the power battery pack is generally performed by a motor control system which can receive a collision power-off signal sent by an air bag controller. When the vehicle is collided, the air bag controller senses an acceleration signal of the collision of the vehicle, and when the acceleration signal reaches a preset threshold value, a collision power-off signal is sent to the motor control system to trigger the motor control system to execute a power-off instruction. The above-mentioned conventional battery package high voltage power-off system has the following problems:
1. because of the difference of collision operating mode, the deformation condition that the battery package received the extrusion can not accurately be reflected to the acceleration signal that the gasbag controller gathered, for example probably the gasbag controller acceleration is bigger, but the battery package does not receive the extrusion deformation, or acceleration signal is not strong, but the battery package casing extrudees the condition of battery module and electricity core.
2. When the electric automobile is parked and charged, the airbag controller powered by a conventional storage battery (a vehicle-mounted low-voltage power supply system) does not work, and an effective power-off strategy cannot be realized through the airbag controller if the automobile is impacted by an external vehicle.
3. When the battery pack is extruded and deformed, the battery pack is only disconnected from the external electric connection, and the problem of out-of-control between the internal modules of the battery pack cannot be effectively solved.
Therefore, the traditional battery pack high-voltage power-off system cannot accurately detect the extrusion deformation condition of the battery pack in the electric automobile, so that the electric automobile still has great potential safety hazards.
Disclosure of Invention
The embodiment of the application aims to provide a battery device, a power-off control method of the battery device and a power-off control device of the battery device, and aims to solve the problem that the extrusion deformation condition of a battery pack cannot be accurately detected by using a traditional battery pack high-voltage power-off system in an electric automobile, and further the potential safety hazard problem of the electric automobile cannot be solved.
In order to solve the above technical problem, the embodiment of the present application is implemented as follows:
on one hand, the embodiment of the application provides a battery device, which comprises a battery shell and a battery module arranged in the battery shell; a parameter sensor, a power-off actuator and a power-off controller are also arranged in the battery shell;
the parameter sensor is electrically connected with the battery module and the power-off controller, and the power-off controller is electrically connected with the power-off actuator; the power-off actuator is electrically connected with the battery module.
On the other hand, an embodiment of the present application provides a power failure control method for a battery device, which is applied to the battery device, and the method includes:
when the battery device is in a charging and discharging state, acquiring parameter information of the battery module in the battery device; the parameter information comprises the internal temperature of the battery module and/or the distance variation between the battery module and the inner wall of the battery shell;
judging whether the battery module meets a preset power-off condition or not according to the parameter information;
if so, the electrical connection relation of the battery modules is disconnected.
In another aspect, an embodiment of the present application provides a power failure control device for a battery device, where the power failure control device is applied to the battery device, and the power failure control device includes:
the acquisition module is used for acquiring parameter information of the battery module in the battery device when the battery device is in a charging and discharging state; the parameter information comprises the internal temperature of the battery module and/or the distance variation between the battery module and the inner wall of the battery shell;
the judging module is used for judging whether the battery module meets a preset power-off condition or not according to the parameter information;
and the control module is used for disconnecting the electrical connection relation of the battery module if the control module is used for disconnecting the electrical connection relation of the battery module.
By adopting the technical scheme provided by one or more embodiments of the specification, the parameter sensor, the power-off actuator and the power-off controller are arranged in the battery device, the parameter sensor is electrically connected with the battery module and the power-off controller, the power-off controller is electrically connected with the power-off actuator, and the power-off actuator is electrically connected with the battery module. The battery device enables the parameter sensor to collect relevant parameter information of the battery module, and controls the disconnection of the electrical connection relation of the battery module through the power-off controller and the power-off actuator. Therefore, compared with the traditional mode of realizing the power failure of the battery module by depending on an external component, the battery device can more accurately acquire the parameter information of the battery module based on the built-in component, further execute an accurate power failure strategy on the battery module, and effectively solve the potential safety hazard problem of the battery device.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic block diagram of a battery device provided according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery device according to another embodiment of the present invention;
fig. 3 is a schematic flowchart of a power-off control method of a battery device according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a power-off control method of a battery device according to another embodiment of the present invention;
fig. 5 is a schematic block diagram of a power outage control apparatus of a battery apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the application aims to provide a battery device, a power-off control method of the battery device and a power-off control device of the battery device, and aims to solve the problem that the extrusion deformation condition of a battery pack cannot be accurately detected by using a traditional battery pack high-voltage power-off system in an electric automobile, and further the potential safety hazard problem of the electric automobile cannot be solved.
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a battery device according to an embodiment of the present invention, as shown in fig. 1, the device includes:
a battery case 101 and a battery module 102 disposed in the battery case 101; the battery housing 101 is further provided with a parameter sensor 103, a power-off actuator 104 and a power-off controller 105.
The parameter sensor 103 is electrically connected with the battery module 102 and the power-off controller 105, and the power-off controller 105 is electrically connected with the power-off actuator 104; the power-off actuator 104 is electrically connected with the battery module 102.
A battery case 101 for protecting the outside of the battery device; and the battery module 102 is used for realizing the transmission and control of electric energy.
In the present embodiment, the specific number of the battery modules 102 and the distribution position within the battery case 101 are not particularly limited. If a plurality of battery modules 102 are provided in the battery case 101, the electrical connection between the battery modules 102 is not particularly limited, and may be, for example, a series connection, a parallel connection, or a combination of series and parallel connections.
In this embodiment, the battery device enables the parameter sensor 103 to collect the relevant parameter information of the battery module 102, and controls the disconnection of the electrical connection relation of the battery module 102 through the power-off controller 105 and the power-off actuator 104. Therefore, compared with the traditional mode of realizing the power failure of the battery module by depending on an external component, the battery device can acquire the parameter information of the battery module more quickly and accurately based on the built-in component, further execute an accurate power failure strategy on the battery module, and effectively solve the potential safety hazard problem of the battery device.
In this embodiment, a plurality of battery modules 102 and a plurality of parameter sensors 103 are provided in the battery case 101. Each battery module 102 is electrically connected with at least one parameter sensor; each parameter sensor 103 is electrically connected to the power-off controller 105.
In this embodiment, the battery case 101 may be provided with only one power-off actuator 104, or may be provided with a plurality of power-off actuators 104.
If only one power-off actuator 104 is disposed in the battery case 101, the plurality of battery modules 102 are electrically connected to the one power-off actuator 104. In this case, since only one power-off actuator 104 is provided, the electrical connection relationship between all the battery modules 102 can be disconnected by the one power-off actuator 104, and thus, not only can the power-off of the battery modules 102 in the battery device be controlled in time, but also the component cost of the battery device can be saved.
If a plurality of power-off actuators 104 are disposed in the battery housing 101, one power-off actuator 104 can be electrically connected between every two adjacent battery modules 102, and each power-off actuator 104 is electrically connected to one power-off controller 105. In this case, the electrical connection relationship between some of the battery modules 102 may be controlled by the power-off actuator 104 between every two adjacent battery modules 102, so that the method is more flexible and controllable in controlling the power-off of the plurality of battery modules 102, for example, only the electrical connection relationship between the battery modules 102 at high temperature risk is disconnected, and the disconnection is not required for the other battery modules 102 at no risk.
The parameter sensor 103 is configured to acquire parameter information of the battery module 102 in the battery device and transmit the parameter information of the battery module 102 to the power-off controller 105.
In this embodiment, the parameter sensor 103 includes a temperature sensor and/or a deformation sensor.
The temperature sensor may be disposed inside the battery module 102 for acquiring an internal temperature of the battery module 102. When the internal temperature of the battery modules 102 reaches a preset temperature threshold, the power-off actuator 104 disconnects the electrical connection between the battery modules 102. The preset temperature threshold may be significantly higher than the abnormal temperature of the battery module 102 during normal operation, and the specific value depends on the extreme value of the operating temperature range of the battery module 102.
The deformation sensor may be disposed between the battery module 102 and the inner wall of the battery housing 101, and is used for acquiring a distance variation between the battery module 102 and the inner wall of the battery housing 101. The amount of distance variation is positively correlated with the degree of deformation compression between the inner wall of the battery case 101 and the battery module 102. When assembling the battery device, a certain distance should be left between the battery module 102 and the battery housing 101, and the specific value depends on the product requirements of the battery device. The deformation sensor may monitor a distance change between the battery module 102 and the battery housing 101 in real time, and when the distance change reaches a preset deformation threshold, the power-off actuator 104 disconnects an electrical connection relationship between the battery modules 102. The preset deformation threshold may be smaller than or equal to the distance between the inner wall of the battery case 101 and the battery module 102 and is not zero, and the specific value depends on the installation arrangement distribution of the battery module 102.
And the power-off actuator 104 is used for disconnecting the electrical connection relation of the corresponding battery module 102.
The power-off controller 105 is configured to determine whether the battery module 102 satisfies a preset power-off condition according to the parameter information of the battery module 102.
In this embodiment, taking a power battery pack applied to an electric vehicle as an example, when the electric vehicle is in a normal driving or parking charging state, the parameter sensor 103 built in the battery device operates synchronously, that is, the parameter sensor 103 acquires parameter information of the battery module 102, and transmits the acquired parameter information of the battery module 102 to the power-off controller 105 in real time. The power-off controller 105 determines whether the battery module 102 satisfies a preset power-off condition according to the acquired parameter information. If yes, a power-off command is sent to the power-off actuator 104, and the power-off actuator 104 disconnects the electrical connection relation of the battery module 102.
In this embodiment, carry out real-time supervision through temperature sensor to the inside temperature of battery module to and carry out real-time supervision through deformation sensor to the distance variation between battery module and the battery case inner wall, can monitor out the abnormal conditions (such as the condition such as high temperature, extrusion deformation) of battery module fast accurately, and then carry out accurate power-off strategy to the battery module, solved traditional dependence external component and realized the not accurate enough problem of mode of battery module outage. In addition, by applying the battery device, the electrical connection relation of the battery module can be disconnected through the components (such as a power-off controller and a power-off actuator) in the battery shell, and the problem of out-of-control in the battery device can be effectively solved.
Fig. 2 is a schematic structural diagram of a battery device according to another embodiment of the present invention, as shown in fig. 2, the device including:
a battery case 201, and a plurality of battery modules 202, a plurality of temperature sensors 2031, a plurality of deformation sensors 2032, a plurality of power cutoff actuators 204, and a power cutoff controller 205 that are provided inside the battery case 201.
Each battery module 202 is connected in series, at least one temperature sensor 2031 is arranged in each battery module 202, and each temperature sensor 2031 is electrically connected with the corresponding battery module 202; at least one deformation sensor 2032 is arranged between each battery module 202 and the inner wall of the battery shell 201, and each deformation sensor 2032 is electrically connected with the corresponding battery module 202; a power-off actuator 204 is disposed between every two adjacent battery modules 202. Each of the power-off actuators 204 is connected in series with each of the battery modules 202. Each of the temperature sensor 2031, the deformation sensor 2032, and the power-off actuator 204 is electrically connected to the power-off controller 205.
Wherein the battery case 201 is used for external protection of the battery device; the battery module 202 is used for realizing the transmission and control of electric energy; each temperature sensor 2031 is used for acquiring the internal temperature of the battery module 202 to which it is electrically connected; each deformation sensor 2032 is used for acquiring the distance variation between the battery module 202 and the inner wall of the battery case 201 which are electrically connected with each other; each power-off actuator 204 is used for disconnecting the electrical connection relationship of the respective electrically connected battery modules 202; the power-off controller 205 is configured to determine whether the battery module 202 meets a preset power-off condition, and send a control command to the power-off actuator 204 in a targeted manner according to the determination result.
In this embodiment, the temperature sensor 2031 provided in the battery module 202 may monitor the internal temperature of the battery module 202 in real time, and the deformation sensor 2032 provided between the battery module 202 and the inner wall of the battery case 201 may monitor the distance variation between the battery module 202 and the inner wall of the battery case 201 in real time.
Because a plurality of temperature sensors 2031 and a plurality of deformation sensors 2032 are provided in the battery device, a one-to-one mapping relationship is provided between each temperature sensor 2031 and each battery module 202, and a one-to-one mapping relationship is also provided between each deformation sensor 2032 and each battery module 202. Optionally, in the mapping relationship, the mapping relationship may be established in a manner of unique identification information. For example, the temperature sensors 2031 and the battery modules 202 are respectively provided with identification information corresponding to each of them, and the mapping relationship and the identification information corresponding to each component are pre-stored in the power-off controller 205, so that the power-off controller 205 can determine which parameter information of the battery module 202 is received according to the mapping relationship.
The power-off controller 205 determines a power-off strategy for each battery module 202 according to the acquired first number of the first battery modules 202 whose internal temperature reaches the preset temperature threshold and the acquired second number of the second battery modules 202 whose distance variation reaches the preset deformation threshold.
Specifically, the first number is greater than or equal to a first threshold, or the second number is greater than or equal to a second threshold, or the second number is less than the second threshold, but the internal temperatures of the other battery modules 202 except the second battery module 202 reach a preset temperature threshold, the power-off controller 205 sends a power-off control instruction to all the power-off actuators 204, and the power-off actuators 204 disconnect the electrical connection relationship of the respective corresponding battery modules 202, so that all the battery modules 202 in the battery device are powered off.
When the first number is smaller than the first threshold and is not zero, the power-off controller 205 sends a power-off control instruction to the power-off actuator 204 having an electrical connection relationship with the first battery module 202, and triggers the power-off actuator 204 to disconnect the electrical connection relationship of the first battery module.
When the second number is smaller than the second threshold and is not zero, the power-off controller 205 sends a power-off control instruction to the power-off actuator 204 having an electrical connection relationship with the second battery module 202, and triggers the power-off actuator 204 to disconnect the electrical connection relationship of the second battery module.
In the embodiment, the temperature sensor and the deformation sensor are arranged in the battery shell, wherein the temperature sensor is arranged in the battery module; the deformation sensor is arranged between the battery module and the inner wall of the battery shell. Therefore, the temperature sensor and the deformation sensor can accurately monitor the condition of the battery module in real time and send parameter information to the power failure controller. When battery module temperature reached and predetermine the temperature threshold value, and/or when the distance variation reached and predetermine the deformation threshold value, the outage controller can in time send the outage instruction to the outage executor to control the electric connection relation between the outage executor disconnection battery module, and can effectively solve the out of control problem between the inside module of battery.
In addition, if the battery device in the present embodiment is applied to an electric vehicle, the battery device does not stop operating when the electric vehicle is parked and charged, and the problem that the power-off strategy cannot be effectively executed by an external component can be solved. And because one outage executor is connected electrically respectively between every two adjacent battery modules, and each outage executor all is connected electrically to the outage controller. Under this condition, the electric connection relation of the battery module that corresponds respectively is controlled to the outage executor between per two adjacent battery modules of accessible to be convenient for go on after the battery device goes wrong to maintain accurately the battery module that has been cut off the power supply, need not all to maintain all battery modules, consequently reduced cost of maintenance.
Fig. 3 is a schematic flowchart of a power-off control method of a battery device according to an embodiment of the present invention, as shown in fig. 3, the method including the steps of:
and S302, acquiring parameter information of a battery module in the battery device when the battery device is in a charging and discharging state.
The parameter information may include an internal temperature of the battery module and/or a distance variation between the battery module and an inner wall of the battery case.
The battery device is in a charging and discharging state, which may mean that the battery device is in a charging state or in a discharging state. For example, the battery device is applied to an electric vehicle, and if the electric vehicle is in a parking charging state, the battery device is considered to be in a charging state; if the electric vehicle is in a driving state, the battery device may be considered to be in a discharged state.
The distance variation can be used for representing the deformation extrusion degree between the inner wall of the battery shell and the battery module, and the distance variation is positively correlated with the deformation extrusion degree between the inner wall of the battery shell and the battery module. For example, the larger the amount of distance change, the higher the degree of deformation squeezing; conversely, a smaller distance change indicates a lower degree of deformation and compression.
In the step, the internal temperature of the battery module can be obtained by monitoring a temperature sensor arranged in the battery module; the distance variation can be monitored by a deformation sensor arranged between the battery module and the inner wall of the battery shell.
And S304, judging whether the battery module meets the preset power-off condition or not according to the parameter information.
In this embodiment, after the power-off controller built in the battery device receives the internal temperature of the battery module and/or the distance variation between the battery module and the inner wall of the battery housing, the power-off controller determines whether the battery module meets the preset power-off condition according to the received parameter information.
S306, if the battery module meets the preset power-off condition, the electrical connection relation of the battery module is disconnected.
In this embodiment, if the power-off controller determines that the battery module satisfies the preset power-off condition, a power-off instruction is sent to the power-off actuator, and after receiving the power-off instruction, the power-off actuator executes power-off operation for the battery module, that is, the electrical connection relationship between the battery modules is disconnected.
For example, if the battery device is applied to an electric vehicle, it is assumed that only one battery module and one power-off actuator are provided in the battery device. When the electric automobile collides in the driving process or in the parking charging process, the battery module has abnormal temperature, and the internal temperature of the battery module received by the power-off controller reaches a preset temperature threshold value, so that the battery module is determined to meet the preset power-off condition. The preset temperature threshold is obviously higher than the abnormal temperature of the battery module during normal work, and the specific value depends on the extreme value of the working temperature range of the used battery module. Similarly, when the battery module is extruded by the battery shell, and the distance variation between the battery module and the inner wall of the battery shell received by the power-off controller reaches a preset variation threshold, it is determined that the battery module meets a preset power-off condition. The preset change threshold value is smaller than or equal to the distance between the battery module and the inner wall of the battery shell, and the specific value depends on the installation arrangement distribution of the battery module. Further, after the battery module is determined to meet the preset power-off condition, the power-off controller generates a power-off instruction and transmits the power-off instruction to the power-off actuator. Correspondingly, if the internal temperature of the battery module does not reach the preset temperature threshold value and the distance variation between the battery module and the inner wall of the battery shell does not reach the preset variation threshold value, it is determined that the battery module does not meet the preset power-off condition, and the power-off controller does not generate a power-off instruction.
In this embodiment, according to the parameter information, the power-off controller determines whether the battery module satisfies a preset power-off condition. If the internal temperature of the battery module reaches a preset temperature threshold value, and/or if the distance variation between the battery module and the inner wall of the battery shell reaches a preset variation threshold value, determining that the battery module meets a preset power-off condition.
In this embodiment, the parameter information includes the internal temperatures of the plurality of battery modules and the amount of change in the distance between the plurality of battery modules and the inner wall. If the parameter information meets at least one of the following conditions (1) to (4), determining that the battery module meets a preset power-off condition:
(1) the number of the first battery modules of which the internal temperature reaches the preset temperature threshold is greater than or equal to a first threshold;
(2) the number of the second battery modules, the distance variation between the battery modules and the inner wall of the battery shell reaches a preset deformation threshold value, is greater than or equal to a second threshold value;
(3) the number of the second battery modules, the distance variation between the battery modules and the inner wall of the battery shell reaches the preset deformation threshold value, is smaller than the second threshold value, but the internal temperature of other battery modules except the second battery modules reaches the preset temperature threshold value;
(4) the number of the first battery modules of which the internal temperature reaches the preset temperature threshold is smaller than the first threshold, but the distance variation between the other battery modules except the first battery module and the inner wall of the battery shell reaches the preset deformation threshold.
The first threshold and the second threshold in the above conditions are not specifically defined, and may be set according to the specific number and the installation arrangement distribution of the battery modules.
Based on the above-mentioned preset power-off conditions, in one embodiment, when S306 is executed, the electrical connection relationship of the battery modules may be broken as follows:
if the number of the first battery modules of which the internal temperature reaches the preset temperature threshold is greater than or equal to the first threshold, disconnecting the electrical connection relation among all the battery modules; and if the number of the first battery modules is smaller than the first threshold value and is not zero, disconnecting the electrical connection relation between the first battery module and other battery modules.
If the number of the second battery modules with the distance variation between the battery modules and the inner wall of the battery shell reaching the preset deformation threshold is larger than or equal to the second threshold, disconnecting the electrical connection relation between all the battery modules; and if the number of the second battery modules is smaller than the second threshold value and is not zero, disconnecting the electrical connection relationship between the second battery modules and other battery modules.
And if the number of the second battery modules is smaller than the second threshold value, but the internal temperatures of other battery modules except the second battery modules reach a preset temperature threshold value, disconnecting the electrical connection relation among all the battery modules.
If the number of the first battery modules is smaller than the first threshold value, but the distance variation between the other battery modules except the first battery module and the inner wall of the battery shell reaches the preset deformation threshold value, the electric connection relation between all the battery modules is disconnected.
By adopting the power-off control method of the battery device provided by the embodiment, the parameter sensor can acquire relevant parameter information of the battery module, and the power-off controller and the power-off actuator are used for controlling the disconnection of the electrical connection relation of the battery module. Therefore, compared with the traditional mode of relying on an external component to realize the power failure of the battery module, the technical scheme can more accurately acquire the parameter information of the battery module, further execute an accurate power failure strategy on the battery module, and effectively solve the potential safety hazard problem of the battery device. In addition, the effect that only the electric connection relation of the battery modules with risks (such as high temperature and extrusion deformation) is disconnected and the disconnection of other battery modules without risks is achieved, so that the battery modules which are disconnected are maintained accurately after the battery device goes wrong, and the maintenance cost is reduced.
Fig. 4 is a schematic flowchart of a power-off control method of a battery device according to another embodiment of the present invention. In this embodiment, the battery device is a power battery pack (hereinafter referred to as a battery pack) applied to an electric vehicle, and the internal structure of the battery pack may be as shown in fig. 2.
As shown in fig. 4, the power-off control method of the battery device may include the steps of:
s401, when the battery pack is in a charging and discharging state, a power-off controller arranged in the battery pack is powered on.
For example, if the electric vehicle is in a parking charging state, the battery pack may be considered to be in a charging state; if the electric vehicle is in a driving state, the battery pack can be considered to be in a discharging state.
S402, monitoring the internal temperature of the battery module through a temperature sensor arranged in the battery module, and monitoring the distance variation between the battery module and the battery shell through a deformation sensor between the battery module and the inner wall of the battery shell.
And S403, acquiring the internal temperature monitored by the temperature sensor and the distance variation monitored by the deformation sensor by the power-off controller.
In this embodiment, because be equipped with a plurality of temperature sensor in the battery package, consequently for realizing the nimble control to each battery module, every temperature sensor and every battery module all are equipped with the only identification information that corresponds, and one-to-one between each battery module and each temperature sensor. Therefore, when the internal temperature monitored by the temperature sensor is transmitted to the power-off controller in real time, the power-off controller can determine the data transmitted by the temperature sensor according to the identification information corresponding to the temperature sensor, so that the received internal temperature of the battery module is determined.
In a similar way, a plurality of deformation sensors are arranged in the battery pack, each deformation sensor and each battery module are provided with unique corresponding identification information for realizing flexible control of each battery module, and each battery module corresponds to each deformation sensor one by one. Therefore, when the deformation sensor transmits the monitored distance variation to the power-off controller in real time, the power-off controller can determine which deformation sensor transmits data according to the identification information corresponding to the deformation sensor, so that the received distance variation of which battery module is determined.
S404, the power failure controller determines a first number of first battery modules with the internal temperature reaching a preset temperature threshold value and a second number of second battery modules with the distance variation reaching a preset deformation threshold value according to the acquired internal temperature and the distance variation.
After this step, the power-off controller determines a power-off strategy for each battery module according to the first number and the second number.
Specifically, if the following condition (one) is satisfied: if the first number is greater than or equal to the first threshold, or the second number is greater than or equal to the second threshold, or the second number is less than the second threshold, but the internal temperatures of the other battery modules except the second battery module reach the preset temperature threshold, then S405 is executed; if the following condition (two) is satisfied: if the first number is smaller than the first threshold and is not zero, S406 is executed; if the following condition (three) is satisfied: the second number is smaller than the second threshold and is not zero, S407 is performed.
And S405, the power failure controller sends power failure control instructions to all the power failure controllers, and triggers each power failure actuator to disconnect the electric connection relation of the corresponding battery module.
In this step, all the power-off controllers can receive the power-off control instruction, so that all the battery modules in the battery pack are powered off.
S406, the power-off controller sends a power-off control instruction to the power-off controller corresponding to the first battery module, and the power-off actuator is triggered to disconnect the electrical connection relation of the first battery module.
The power-off actuator corresponding to the first battery module refers to a power-off actuator electrically connected with the first battery module.
And S407, the power-off controller sends a power-off control instruction to the power-off controller corresponding to the second battery module, and the power-off actuator is triggered to disconnect the electrical connection relation of the second battery module.
The power-off actuator corresponding to the second battery module refers to a power-off actuator electrically connected with the second battery module.
Therefore, by adopting the technical scheme provided by the embodiment, the parameter sensor can acquire the relevant parameter information of the battery module, and the disconnection of the electrical connection relation of the battery module is controlled by the power-off controller and the power-off actuator. Therefore, compared with the traditional mode of relying on an external component to realize the power failure of the battery module, the technical scheme can more accurately acquire the parameter information of the battery module, further execute an accurate power failure strategy on the battery module, and effectively solve the potential safety hazard problem of the battery device. By adopting the method, the effect that the electric connection relation of the battery modules with risks (such as high temperature and extrusion deformation) is only disconnected, and other battery modules without risks are not required to be disconnected can be realized, so that the battery modules which are disconnected are conveniently and accurately maintained after the battery device has a problem, and the maintenance cost is reduced.
In summary, particular embodiments of the present subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results.
Based on the same idea, the embodiment of the present application further provides a power failure control device for a battery device.
Fig. 5 is a schematic structural diagram of a power outage control device of a battery device according to an embodiment of the present invention, as shown in fig. 5, the device includes:
the obtaining module 510 is configured to obtain parameter information of a battery module in the battery device when the battery device is in a charge-discharge state.
The determining module 520 is configured to determine whether the battery module satisfies a preset power-off condition according to the parameter information.
The control module 530 is configured to disconnect the electrical connection relationship of the battery module if the battery module meets a preset power-off condition.
In one embodiment, the determining module 520 includes:
the first determining unit is used for determining that the battery module meets the preset power-off condition if the internal temperature of the battery module reaches a preset temperature threshold value and/or if the distance variation between the battery module and the inner wall of the battery shell reaches a preset variation threshold value.
In one embodiment, the parameter information includes the internal temperature of the plurality of battery modules and the amount of change in the distance between the plurality of battery modules and the inner wall;
the determining module 520 includes:
a second determining unit, configured to determine that the battery module satisfies the preset power-off condition if the parameter information satisfies at least one of the following conditions:
the number of the first battery modules of which the internal temperature reaches the preset temperature threshold is greater than or equal to a first threshold;
the number of the second battery modules with the distance variation reaching the preset deformation threshold is greater than or equal to a second threshold;
the number of the second battery modules is less than the second threshold, but the internal temperature of the other battery modules except the second battery module reaches the preset temperature threshold.
In one embodiment, the control module 530 includes:
a control unit for:
if the number of the first battery modules with the internal temperature reaching the preset temperature threshold is greater than or equal to the first threshold, disconnecting the electrical connection relation among all the battery modules; and if the number of the first battery modules is smaller than the first threshold value and is not zero, disconnecting the electrical connection relation between the first battery module and other battery modules.
If the number of the second battery modules with the distance variation reaching the preset deformation threshold is larger than or equal to the second threshold, disconnecting the electrical connection relation among all the battery modules; and if the number of the second battery modules is smaller than the second threshold value and is not zero, disconnecting the electrical connection relation between the second battery module and other battery modules.
And if the number of the second battery modules is smaller than the second threshold value, but the internal temperatures of the other battery modules except the second battery modules reach the preset temperature threshold value, disconnecting the electrical connection relation among all the battery modules. By adopting the device in one or more embodiments of the specification, the parameter sensor can acquire relevant parameter information of the battery module, and the disconnection of the electrical connection relation of the battery module is controlled by the power-off controller and the power-off actuator. Therefore, compare in traditional mode that relies on the external component to realize the outage of battery module, this battery device's outage controlling means can gather the parameter information of battery module more accurately, and then carries out accurate outage strategy to the battery module, has effectively solved battery device's potential safety hazard problem. By adopting the method, the effect that the electric connection relation of the battery modules with risks (such as high temperature and extrusion deformation) is only disconnected, and other battery modules without risks are not required to be disconnected can be realized, so that the battery modules which are disconnected are conveniently and accurately maintained after the battery device has a problem, and the maintenance cost is reduced.
It should be understood by those skilled in the art that the power failure control apparatus of the battery apparatus in fig. 5 can be used to implement the power failure control method of the battery apparatus described above, and the detailed description thereof should be similar to the description of the method section above, and therefore, in order to avoid complexity, no further description is provided herein.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A battery device comprises a battery shell and a battery module arranged in the battery shell; the battery is characterized in that a parameter sensor, a power-off actuator and a power-off controller are also arranged in the battery shell;
the parameter sensor is electrically connected with the battery module and the power-off controller, and the power-off controller is electrically connected with the power-off actuator; the power-off actuator is electrically connected with the battery module.
2. The battery device according to claim 1, wherein a plurality of battery modules and a plurality of parameter sensors are arranged in the battery housing, and each battery module is electrically connected with at least one parameter sensor; and each parameter sensor is electrically connected with the power-off controller respectively.
3. The battery device of claim 2, wherein one of said power-off actuators is disposed within said battery housing;
the plurality of battery modules are electrically connected to one power-off actuator.
4. The battery device of claim 2, wherein a plurality of said power-off actuators are disposed within said battery housing;
the two adjacent battery modules are electrically connected with one power-off actuator respectively; each of the power-off actuators is electrically connected to the power-off controller.
5. The battery device according to any one of claims 1 to 4, wherein the parameter sensor comprises a temperature sensor and/or a deformation sensor;
the temperature sensor is arranged inside the battery module; the deformation sensor is arranged between the battery module and the inner wall of the battery shell.
6. A power-off control method of a battery device, applied to the battery device according to any one of claims 1 to 5, characterized by comprising:
when the battery device is in a charging and discharging state, acquiring parameter information of the battery module in the battery device; the parameter information comprises the internal temperature of the battery module and/or the distance variation between the battery module and the inner wall of the battery shell;
judging whether the battery module meets a preset power-off condition or not according to the parameter information;
if so, the electrical connection relation of the battery modules is disconnected.
7. The method according to claim 6, wherein the determining whether the battery module satisfies a preset power-off condition according to the parameter information comprises:
if the internal temperature of the battery module reaches a preset temperature threshold value, and/or if the distance variation between the battery module and the inner wall of the battery shell reaches a preset variation threshold value, determining that the battery module meets the preset power-off condition.
8. The method according to claim 7, wherein the parameter information includes the internal temperature of the plurality of battery modules and the amount of change in the distance between the plurality of battery modules and the inner wall;
the judging whether the battery module meets the preset power-off condition or not according to the parameter information comprises the following steps:
if the parameter information meets at least one of the following conditions, determining that the battery module meets the preset power-off condition:
the number of the first battery modules of which the internal temperature reaches the preset temperature threshold is greater than or equal to a first threshold;
the number of the second battery modules with the distance variation reaching the preset deformation threshold is greater than or equal to a second threshold;
the number of the second battery modules is less than the second threshold, but the internal temperature of the other battery modules except the second battery module reaches the preset temperature threshold.
9. The method according to claim 8, wherein the disconnecting the electrical connection of the battery modules comprises:
if the number of the first battery modules with the internal temperature reaching the preset temperature threshold is greater than or equal to the first threshold, disconnecting the electrical connection relation among all the battery modules; if the number of the first battery modules is smaller than the first threshold value and is not zero, disconnecting the electrical connection relation between the first battery module and other battery modules;
if the number of the second battery modules with the distance variation reaching the preset deformation threshold is larger than or equal to the second threshold, disconnecting the electrical connection relation among all the battery modules; if the number of the second battery modules is smaller than the second threshold value and is not zero, disconnecting the electrical connection relationship between the second battery modules and other battery modules;
and if the number of the second battery modules is smaller than the second threshold value, but the internal temperatures of the other battery modules except the second battery modules reach the preset temperature threshold value, disconnecting the electrical connection relation among all the battery modules.
10. A power-off control device for a battery device, applied to the battery device according to any one of claims 1 to 5, characterized in that the device comprises:
the acquisition module is used for acquiring parameter information of the battery module in the battery device when the battery device is in a charging and discharging state; the parameter information comprises the internal temperature of the battery module and/or the distance variation between the battery module and the inner wall of the battery shell;
the judging module is used for judging whether the battery module meets a preset power-off condition or not according to the parameter information;
and the control module is used for disconnecting the electrical connection relation of the battery module if the control module is used for disconnecting the electrical connection relation of the battery module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328196A (en) * | 2021-05-27 | 2021-08-31 | 广州小鹏汽车科技有限公司 | Battery module, battery pack and vehicle |
| CN114665176A (en) * | 2022-03-20 | 2022-06-24 | 中国第一汽车股份有限公司 | Deformation monitoring device for battery pack, battery pack and monitoring method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10310004A (en) * | 1997-05-09 | 1998-11-24 | Harness Sogo Gijutsu Kenkyusho:Kk | Safety device in vehicle |
| CN102508169A (en) * | 2011-11-07 | 2012-06-20 | 浙江绿源电动车有限公司 | Device and method for obtaining battery capacity |
| CN204632881U (en) * | 2015-05-29 | 2015-09-09 | 深圳市昂佳科技有限公司 | A kind of lithium polymer battery with safety guard |
| CN105552460A (en) * | 2016-02-03 | 2016-05-04 | 宁德时代新能源科技股份有限公司 | System and method for self-isolating abnormal battery |
| CN106816929A (en) * | 2017-02-16 | 2017-06-09 | 上海与德通讯技术有限公司 | Battery, terminal and battery protecting method |
| CN206388814U (en) * | 2017-01-20 | 2017-08-08 | 宁德时代新能源科技股份有限公司 | Secondary cell |
| CN110534825A (en) * | 2019-07-26 | 2019-12-03 | 中国电力科学研究院有限公司 | Lithium ion battery thermal runaway early warning method |
| US20200106140A1 (en) * | 2018-10-01 | 2020-04-02 | Sf Motors, Inc. | Measurement lid for battery cell of an electric vehicle |
-
2020
- 2020-08-31 CN CN202010896952.1A patent/CN112133971B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10310004A (en) * | 1997-05-09 | 1998-11-24 | Harness Sogo Gijutsu Kenkyusho:Kk | Safety device in vehicle |
| CN102508169A (en) * | 2011-11-07 | 2012-06-20 | 浙江绿源电动车有限公司 | Device and method for obtaining battery capacity |
| CN204632881U (en) * | 2015-05-29 | 2015-09-09 | 深圳市昂佳科技有限公司 | A kind of lithium polymer battery with safety guard |
| CN105552460A (en) * | 2016-02-03 | 2016-05-04 | 宁德时代新能源科技股份有限公司 | System and method for self-isolating abnormal battery |
| CN206388814U (en) * | 2017-01-20 | 2017-08-08 | 宁德时代新能源科技股份有限公司 | Secondary cell |
| CN106816929A (en) * | 2017-02-16 | 2017-06-09 | 上海与德通讯技术有限公司 | Battery, terminal and battery protecting method |
| US20200106140A1 (en) * | 2018-10-01 | 2020-04-02 | Sf Motors, Inc. | Measurement lid for battery cell of an electric vehicle |
| CN110534825A (en) * | 2019-07-26 | 2019-12-03 | 中国电力科学研究院有限公司 | Lithium ion battery thermal runaway early warning method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328196A (en) * | 2021-05-27 | 2021-08-31 | 广州小鹏汽车科技有限公司 | Battery module, battery pack and vehicle |
| CN114665176A (en) * | 2022-03-20 | 2022-06-24 | 中国第一汽车股份有限公司 | Deformation monitoring device for battery pack, battery pack and monitoring method |
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|---|---|
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