CN113745768B - Power battery system and battery thermal runaway control method - Google Patents
Power battery system and battery thermal runaway control method Download PDFInfo
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- CN113745768B CN113745768B CN202110856740.5A CN202110856740A CN113745768B CN 113745768 B CN113745768 B CN 113745768B CN 202110856740 A CN202110856740 A CN 202110856740A CN 113745768 B CN113745768 B CN 113745768B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims description 31
- 239000000779 smoke Substances 0.000 claims description 29
- 230000006870 function Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
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- 238000012986 modification Methods 0.000 description 4
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- 230000005856 abnormality Effects 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- 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
-
- 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
- H01M10/4285—Testing apparatus
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- 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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
-
- 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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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
The invention discloses a power battery system and a battery thermal runaway control method, wherein the power battery system comprises: m power battery modules, a high-voltage disconnection module, a high-voltage control box, a high-voltage connecting piece, a low-voltage connecting piece and a battery management module; the m power battery modules, the high-voltage disconnection module and the high-voltage control box are sequentially connected in series through the high-voltage connecting piece to form a high-voltage loop of the power battery system; the battery management module is used for controlling the high-voltage disconnection module to disconnect the high-voltage loop into at least two local circuits when a battery thermal runaway event of the power battery system is detected, and each local circuit is a part of a component circuit of the high-voltage loop. The invention can solve the technical problem of battery thermal runaway arc discharge in the prior art.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a power battery system and a battery thermal runaway control method.
Background
With popularization and application of new energy automobiles, application of lithium ion power batteries to electric automobiles has become a trend. The safety problem of the power battery system is one of the important technical problems affecting the development of new energy automobiles, and particularly, the prevention of a thermal runaway event of a battery (pack).
When the battery pack is subjected to a thermal runaway event due to internal or external causes, the battery cells release high temperature fumes in a short time, the fumes including a large amount of conductive solid particles, partially expelled from the battery pack, and partially accumulated in the battery pack. When the high-temperature deposit breaks the high-voltage circuit and the insulating layer on the lower surface of the upper cover, the anode and the cathode of the battery module and the high-voltage circuit conducting wire/metal upper cover form a local short circuit. The local short circuit loop instantaneously releases larger energy and has the damage of arc discharge, electric spark and the like.
Therefore, how to solve the problem of thermal runaway arcing of the battery during the use of the power battery system is particularly important and urgent.
Disclosure of Invention
The embodiment of the application solves the technical problem of battery thermal runaway arc discharge in the prior art by providing the power battery system and the battery thermal runaway control method.
In one aspect, the present application provides, by an embodiment of the present application, a power battery system comprising: m power battery modules, a high-voltage disconnection module, a high-voltage control box, a high-voltage connecting piece, a low-voltage connecting piece and a battery management module; the m power battery modules, the high-voltage disconnection module and the high-voltage control box are sequentially connected in series through the high-voltage connecting piece to form a high-voltage loop of the power battery system, and m is a positive integer greater than or equal to 2;
the battery management module is respectively connected with the m power battery modules, the high-voltage disconnection module and the high-voltage control box through the low-voltage connecting piece, and is used for controlling the high-voltage disconnection module to disconnect the high-voltage loop into at least two partial circuits when a battery thermal runaway event of the power battery system is detected, wherein each partial circuit is a partial component circuit of the high-voltage loop.
Optionally, the power battery system further includes: the sensing monitoring module is connected with the battery management module through the low-voltage connecting piece and is used for collecting sensing data in the power battery system so as to detect and determine whether the power battery system has a battery out-of-control event according to the sensing data.
Optionally, the sensing and monitoring module comprises a smoke air pressure monitoring module, and the smoke air pressure monitoring module is connected with the battery management module through the low-voltage connecting piece and is used for transmitting the collected smoke data and air pressure data in the power battery system to the battery management module.
Optionally, the sensing and monitoring module includes m voltage and temperature monitoring modules, where the m voltage and temperature monitoring modules are connected with the m power battery modules and the battery management module through the low-voltage connection piece in sequence correspondingly, and are used to transmit the collected battery voltages and battery temperatures of the m power battery modules to the battery management module.
Optionally, the power battery system further includes: the high-voltage connector is connected with the high-voltage control box through the high-voltage connecting piece, and the low-voltage connector is connected with the battery management module through the low-voltage connecting piece.
Optionally, the high voltage disconnect module is disposed in the middle of half of the equally divided positions of the m power battery modules connected in series.
In another aspect, the present application provides, according to an embodiment of the present application, a method for controlling thermal runaway of a battery, where the method is applied to a power battery system, the power battery system includes: m power battery modules, a high voltage disconnect module, a high voltage control box, and a high voltage connection, wherein the method comprises:
acquiring sensing data of the power battery system, wherein the sensing data comprises at least one of the following: smoke data, air pressure data, the battery temperature of each of the m power battery modules and the battery voltage of each of the m power battery modules, wherein m is a positive integer greater than or equal to 2;
performing thermal runaway detection on the sensing data to detect whether a battery thermal runaway event occurs in the power battery system;
when a battery thermal runaway event of the power battery system is detected, controlling the high-voltage disconnection module to disconnect a high-voltage loop of the power battery system into at least two local circuits;
each local circuit is a part of a circuit formed by the high-voltage circuit, and the high-voltage circuit is a circuit formed by sequentially connecting the m power battery modules, the high-voltage disconnection module and the high-voltage control box in series through the high-voltage connecting piece.
Optionally, the performing thermal runaway detection on the sensing data to detect whether a battery thermal runaway event occurs in the power battery system includes:
judging whether the sensing data meets a preset thermal runaway condition or not;
if yes, determining that a battery thermal runaway event of the power battery system is currently detected;
wherein the thermal runaway condition is correspondingly matched to the sensed data, the thermal runaway condition comprising at least one of: the smoke data indicates an amount of smoke exceeding a first threshold, the air pressure data indicates an air pressure value exceeding a second threshold, a sum of battery temperatures of the m power battery modules exceeding a third threshold, and a sum of battery voltages of the m power battery modules exceeding a fourth threshold.
Optionally, after detecting the occurrence of a battery thermal runaway event of the power battery system, the method further comprises:
and carrying out corresponding thermal runaway early warning prompt of the power battery system according to a preset thermal runaway early warning strategy.
Optionally, after detecting the occurrence of a battery thermal runaway event of the power battery system, the method further comprises:
controlling the external output power of the power battery system to be a preset power; and/or the number of the groups of groups,
and controlling the high-voltage disconnection module to disconnect the high-voltage loop of the power battery system so as to inhibit power output.
In another aspect, the present application provides, by an embodiment of the present application, a computer readable storage medium storing program code for performing a method of controlling thermal runaway of a battery as described above when the program code is run on a power battery system.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages: the application provides a power battery system comprising: the m power battery modules, the high-voltage disconnection module and the high-voltage control box are sequentially connected in series through the high-voltage connecting piece to form a high-voltage loop of the power battery system, when the battery management module detects that a battery thermal runaway event occurs in the power battery system, the high-voltage disconnection module is controlled to disconnect the high-voltage loop into at least two partial circuits, so that an arc-pulling loop with internal short circuit formed by the high-voltage loop and a metal part in the power battery system is reduced or avoided, namely, the arc-pulling event of the high-voltage loop is effectively reduced, and the safety influence caused by the thermal runaway event is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a power battery system according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of another power battery system according to an embodiment of the present application.
Fig. 3 is a schematic flow chart of a control method for thermal runaway of a battery according to an embodiment of the present application.
Description of the drawings:
10-a power battery system; 101-a power battery module; 102-a high voltage disconnect module; 103-a high-pressure control box; 104-high voltage connection; 105-low pressure connector; 106-a battery management module; 107-other monitoring modules of smog; 108-a voltage temperature monitoring module; 109-high voltage connector; 110-low voltage connector.
Detailed Description
The embodiment of the application solves the technical problem of battery thermal runaway arc discharge in the prior art by providing the power battery system and the battery thermal runaway control method.
The technical scheme of the embodiment of the application aims to solve the technical problems, and the overall thought is as follows: the application provides a power battery system comprising: m power battery modules, a high-voltage disconnection module, a high-voltage control box, a high-voltage connecting piece, a low-voltage connecting piece and a battery management module; the m power battery modules, the high-voltage disconnection module and the high-voltage control box are sequentially connected in series through the high-voltage connecting piece to form a high-voltage loop of the power battery system, and m is a positive integer greater than or equal to 2;
the battery management module is respectively connected with the m power battery modules, the high-voltage disconnection module and the high-voltage control box through the low-voltage connecting piece, and is used for controlling the high-voltage disconnection module to disconnect the high-voltage loop into at least two partial circuits when a battery thermal runaway event of the power battery system is detected, wherein each partial circuit is a partial component circuit of the high-voltage loop.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
First, the term "and/or" appearing herein is merely an association relationship describing associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Fig. 1 is a schematic structural diagram of a power battery system according to an embodiment of the present application. The power battery system 10 shown in fig. 1 includes: m power battery modules 101, a high voltage disconnection module 102, a high voltage control box 103, a high voltage connector 104, a low voltage connector 105, and a battery management module 106, m being a positive integer greater than or equal to 2. The m power battery modules 101, the high-voltage disconnection module 102 and the high-voltage control box 103 are sequentially connected in series through the high-voltage connector 104, so as to form a high-voltage loop of the power battery system 10.
The battery management module 106 is connected to the m power battery modules 101, the high voltage disconnection module 102, and the high voltage control box 103 through the low voltage connection 105, respectively. The battery management module 106 is configured to control the high voltage disconnection module 102 to disconnect the high voltage circuit into at least two partial circuits, each of which is a partial constituent circuit of the high voltage circuit, when a thermal runaway event of the power battery system 10 is detected.
The power battery module 101 in this application may be composed of a plurality of cells connected in series and parallel, and a plurality of other power battery modules 101 connected in series by the high-voltage connector 104. The voltage and temperature of each of the power battery modules 101 may correspond to what are referred to as a cell voltage (or battery voltage) and a cell temperature (or battery temperature) of the power battery module 101.
The high voltage disconnection module 102 is responsible for actively disconnecting the high voltage circuit under the control of the battery management module 106, which is specifically a disposable active trip resistor, or may be a multi-use active disconnection contact, or other device capable of actively disconnecting the high voltage circuit.
Optionally, the deployment location and the deployment number of the high-voltage disconnection module 102 are not limited in this application. For example, the deployment position of the high-voltage disconnection module 102 in the high-voltage circuit is in the middle of an aliquoting position of a half of the number of m power battery modules 101 connected in series. I.e., at half the number of battery modules 101 in series, or at other series numbers, e.g., at 1/3, 1/4, etc. The disconnection effect can cut off the high-voltage loop into a multi-section local circuit with lower voltage when the system is in a thermal runaway event.
In the illustrated structure, the battery packs in the power battery module 101 are arranged in two rows, i.e., left and right/up and down, and the high-voltage disconnection module 102 is preferably connected in the high-voltage circuit at the middle of the two rows of modules, such as the discharge position of the high-voltage disconnection module 102 in the illustrated structure. When the high voltage disconnection module 102 is disconnected to both ends of connection points 1021 and 1022 (connection points between the high voltage connection member 104 and the high voltage disconnection module 102), the m power battery modules 101 are cut into upper and lower partial circuits, which can effectively prevent the upper and lower partial power battery modules 101 from forming a partial arc discharge loop of the power battery system 10 through metal components.
The high voltage control box 103 has a pre-charging resistor and a plurality of contactors (which can be understood as relays or switches), and can realize the normal charging and discharging, high voltage output power up and down functions of the power battery system 10 through certain connection and arrangement.
The high voltage connection 104 may be specifically a connection line for supporting a high voltage connection, and the low voltage connection 105 may be specifically a connection line for supporting a low voltage connection.
The battery management module 106 (Battery Management System, BMS) has battery status monitoring, battery sensing monitoring, battery thermal runaway warning, on/off control of contactors inside the high voltage control box 103, control of the high voltage disconnection module 102, communication interaction with other controllers in the vehicle, other basic module functions, etc., which are specifically described in detail below, and are not repeated here.
In an alternative embodiment, please refer to fig. 2 together, which is a schematic diagram of another power battery system according to an embodiment of the present application. The power cell system 10 shown in fig. 2 may further include a sensing and monitoring module (not shown) coupled to the battery management module 106 via the low voltage connection 105. The sensing and monitoring module is configured to collect sensing data of the power battery system 10 and transmit the collected sensing data to the battery management module 106. The battery management module 106 is facilitated to detect and determine from the sensed data whether a battery runaway event has occurred with the power battery system 10.
In a specific embodiment, the sensing and monitoring module includes a smoke pressure monitoring module 107. The smoke pressure monitoring module 107 is connected to the battery management module 106 via the low pressure connection 105. The smoke pressure monitoring module 107 is configured to monitor and collect smoke data and air pressure data in the power battery system 10, and transmit the collected smoke data and air pressure data to the battery management module 106.
Alternatively, the smoke pressure monitoring module 107 can monitor the smoke pressure within the power cell system 10 in real time. When a thermal runaway event occurs within the power cell system 10, the smoke data and barometric pressure anomaly information can be effectively monitored and communicated to the battery management module 106 via a communication loop.
In yet another particular embodiment, the sensing and monitoring modules may further include m voltage temperature monitoring modules 108. The m voltage temperature monitoring modules 108 are respectively connected with the m power battery modules 101 through the low-voltage connection pieces 105. One of the voltage temperature monitoring modules 108 corresponds to one of the power battery modules 101 for monitoring and collecting the battery voltage and the battery temperature of the power battery module 101 and transmitting them to the battery management module 106.
Optionally, the power cell system 10 may further include a high voltage connector 109 and a low voltage connector 110. The high-voltage connector 109 is connected with the high-voltage control box 103 through the high-voltage connector 104, and the high-voltage connector 109 is used for providing external high-voltage output power for the power battery system 10. The high voltage control box 103 controls whether to output the output power of the high voltage loop to the outside through the high voltage connector by controlling the internal contactor. The low voltage connector 110 is connected to the battery management module 106 through the low voltage connector 105, and the low voltage connector 110 is used to provide low voltage output power to the outside of the power battery system 10.
Through implementing this application, provide a power battery system that reduces battery thermal runaway and draw arc, after taking place thermal runaway event in power battery system, adopt this application scheme can effectively reduce the arc event of drawing of high-voltage loop, with the safety impact that thermal runaway event caused to reduce to minimum.
Based on the foregoing embodiments of fig. 1 and fig. 2, please refer to fig. 3, which is a schematic flow chart of a control method for thermal runaway of a battery according to an embodiment of the present application. The method shown in fig. 3 is applied to the power battery system shown in fig. 1 and 2, and includes the following implementation steps:
s301, the battery management module 106 acquires the sensing data of the power battery system 10. The sensing data includes at least one of: smoke data, air pressure data, battery temperature of each of m power battery modules and battery voltage of each of m power battery modules, m being a positive integer greater than or equal to 2.
The smoke data and the air pressure data are acquired by a smoke air pressure monitoring module 107 in the power battery system 10, and the battery temperature and the battery voltage are acquired by a voltage temperature monitoring module 108 in the power battery system 10.
S302, the battery management module 106 performs thermal runaway detection on the sensing data to detect whether a battery thermal runaway event occurs in the power battery system 10.
The present application detects and determines whether a battery thermal runaway event is currently occurring in the power battery system 10 by determining whether the sensed data satisfies a preset thermal runaway condition. The thermal runaway condition corresponds one-to-one to the sensed data, which may be specifically system or user-defined, which may include, but is not limited to, any one or more of the following combinations: the smoke data indicates an amount of smoke exceeding a first threshold, the air pressure data indicates an air pressure value exceeding a second threshold, a sum of battery temperatures of the m power battery modules exceeding a third threshold, and a sum of battery voltages of the m power battery modules exceeding a fourth threshold.
The first threshold, the second threshold, the third threshold and the fourth threshold are all set by a system in a self-defined manner or are experience values set according to user experience, and the application is not limited.
When the sensing data meets the preset thermal runaway condition, determining that the battery thermal runaway event of the power battery system 10 is detected, and continuing to execute step S303; otherwise, it is determined that the battery thermal runaway event of the power battery system 10 is not detected, and the process is ended.
S303, when a battery thermal runaway event of the power battery system 10 is detected, the battery management module 106 controls the high voltage disconnection module 102 to disconnect the high voltage circuit of the power battery system 10 into at least two local circuits, so that the internal arcing circuit can be reduced. Each local circuit is a circuit formed by sequentially connecting the m power battery modules 101, the high-voltage disconnection module 102 and the high-voltage control box 103 in series through the high-voltage connecting piece 104.
In an alternative embodiment, the battery management module 106 may also perform a corresponding thermal runaway warning prompt based on a preset thermal runaway warning strategy after detecting the thermal runaway event of the power battery system 10. For example, when detecting that the smoke data exceeds the standard (the smoke quantity indicated by the smoke data exceeds the first threshold), a smoke exceeding early warning prompt is performed, such as sending a smoke exceeding early warning signal. And for example, when the gas pressure data is detected to be abnormal (the gas value indicated by the gas pressure data exceeds a second threshold value), gas abnormality early warning prompt is carried out, such as gas pressure abnormality information is sent.
Optionally, the battery management module 106 may further communicate with a controller of the entire vehicle to reduce the external output power of the power battery system 10 to a minimum preset power, such as 0. And/or, the battery management module 106 may also select a power reduction mode to process, specifically, the battery management module 106 may control the high voltage control box 103 to disconnect the external high voltage loop of the power battery system 10, and terminate the external electric energy output; for example, the internal contactor of the high voltage control box 103 is opened to disconnect the high voltage control box 103 and the high voltage connector 109, thereby prohibiting/preventing the external power output of the high voltage circuit.
By implementing the application, the application provides a power battery system comprising: the m power battery modules, the high-voltage disconnection module and the high-voltage control box are sequentially connected in series through the high-voltage connecting piece to form a high-voltage loop of the power battery system, when the battery management module detects that a battery thermal runaway event occurs in the power battery system, the high-voltage disconnection module is controlled to disconnect the high-voltage loop into at least two partial circuits, so that an arc-pulling loop with internal short circuit formed by the high-voltage loop and a metal part in the power battery system is reduced or avoided, namely, the arc-pulling event of the high-voltage loop is effectively reduced, and the safety influence caused by the thermal runaway event is reduced.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A power battery system, the power battery system comprising: m power battery modules, a high-voltage disconnection module, a high-voltage control box, a high-voltage connecting piece, a low-voltage connecting piece and a battery management module; the m power battery modules, the high-voltage disconnection module and the high-voltage control box are sequentially connected in series through the high-voltage connecting piece to form a high-voltage loop of the power battery system, and m is a positive integer greater than or equal to 2;
the battery management module is respectively connected with the m power battery modules, the high-voltage disconnection module and the high-voltage control box through the low-voltage connecting piece, and is used for controlling the high-voltage disconnection module to disconnect the high-voltage loop into at least two partial circuits when detecting that a battery thermal runaway event occurs in the power battery system, wherein each partial circuit is a partial component circuit of the high-voltage loop;
each of the local circuits includes more than one of the power battery modules;
the internal arrangement mode of the battery packs in the m power battery modules is a structure of left-right/up-down two rows, and the connection mode of the high-voltage disconnection module in the high-voltage loop is in the middle of the two rows of modules; the high-voltage breaking module is an active breaking resistor;
the high-voltage control box is internally provided with a pre-charging resistor and a plurality of contactors, and is used for realizing normal charging and discharging and high-voltage output power-on and power-off functions of the power battery system.
2. The system of claim 1, wherein the power cell system further comprises: the sensing monitoring module is connected with the battery management module through the low-voltage connecting piece and is used for collecting sensing data in the power battery system so as to detect and determine whether the battery thermal runaway event occurs in the power battery system according to the sensing data.
3. The system of claim 2, wherein the sensing and monitoring module comprises a smoke pressure monitoring module connected to the battery management module via the low voltage connection for transmitting collected smoke and gas pressure data within the power battery system to the battery management module.
4. The system of claim 2, wherein the sensing and monitoring module comprises m voltage and temperature monitoring modules, and the m voltage and temperature monitoring modules are sequentially connected with the m power battery modules and the battery management module correspondingly through the low-voltage connecting piece and used for transmitting the collected battery voltage and battery temperature of each of the m power battery modules to the battery management module.
5. The system of claim 1, wherein the power cell system further comprises: the high-voltage connector is connected with the high-voltage control box through the high-voltage connecting piece, and the low-voltage connector is connected with the battery management module through the low-voltage connecting piece.
6. The system of any one of claims 1-5, wherein the high voltage disconnect module is disposed in the middle of half of the number of halving positions in the m power cell modules connected in series.
7. A control method of thermal runaway of a battery, characterized in that the control method is applied to a power battery system, the power battery system comprises: m power battery modules, a high voltage disconnect module, a high voltage control box, and a high voltage connection, the method comprising:
acquiring sensing data of the power battery system, wherein the sensing data comprises at least one of the following: smoke data, air pressure data, the battery temperature of each of the m power battery modules and the battery voltage of each of the m power battery modules, wherein m is a positive integer greater than or equal to 2;
performing thermal runaway detection on the sensing data to detect whether a battery thermal runaway event occurs in the power battery system;
when a battery thermal runaway event of the power battery system is detected, controlling the high-voltage disconnection module to disconnect a high-voltage loop of the power battery system into at least two local circuits;
each local circuit is a part of a circuit formed by the high-voltage circuit, and the high-voltage circuit is a circuit formed by sequentially connecting the m power battery modules, the high-voltage disconnection module and the high-voltage control box in series through the high-voltage connecting piece;
each of the local circuits includes more than one of the power battery modules;
the internal arrangement mode of the battery packs in the m power battery modules is a structure of left-right/up-down two rows, and the connection mode of the high-voltage disconnection module in the high-voltage loop is in the middle of the two rows of modules; the high-voltage breaking module is an active breaking resistor;
the high-voltage control box is internally provided with a pre-charging resistor and a plurality of contactors, and is used for realizing normal charging and discharging and high-voltage output power-on and power-off functions of the power battery system.
8. The method of claim 7, wherein the performing a thermal runaway detection on the sensed data to detect whether a battery thermal runaway event has occurred in the power battery system comprises:
judging whether the sensing data meets a preset thermal runaway condition or not;
if yes, determining that a battery thermal runaway event of the power battery system is currently detected;
wherein the thermal runaway condition is correspondingly matched to the sensed data, the thermal runaway condition comprising at least one of: the smoke data indicates an amount of smoke exceeding a first threshold, the air pressure data indicates an air pressure value exceeding a second threshold, a sum of battery temperatures of the m power battery modules exceeding a third threshold, and a sum of battery voltages of the m power battery modules exceeding a fourth threshold.
9. The method of claim 8, wherein upon detecting a battery thermal runaway event of the power battery system, the method further comprises:
and carrying out corresponding thermal runaway early warning prompt of the power battery system according to a preset thermal runaway early warning strategy.
10. The method of any of claims 7-9, wherein upon detecting a battery thermal runaway event of the power battery system, the method further comprises:
controlling the external output power of the power battery system to be a preset power; and/or the number of the groups of groups,
and controlling the high-voltage control box to disconnect the high-voltage loop of the power battery system so as to inhibit power output.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544215A (en) * | 2009-05-12 | 2009-09-30 | 奇瑞汽车股份有限公司 | High-voltage double-loop safety system of electric vehicle and method thereof |
| CN104786846A (en) * | 2015-04-07 | 2015-07-22 | 安徽江淮汽车股份有限公司 | Electrical safety protection method, module and system for electric automobile |
| KR101795319B1 (en) * | 2016-12-13 | 2017-12-01 | 현대자동차주식회사 | System and method for detecting opening of fuse in high voltage system of vehicle |
| JP2018133910A (en) * | 2017-02-15 | 2018-08-23 | 株式会社デンソー | Power supply circuit |
| CN110782633A (en) * | 2019-10-31 | 2020-02-11 | 重庆长安新能源汽车科技有限公司 | New energy automobile power battery thermal runaway alarm system and method |
| CN110912085A (en) * | 2019-12-03 | 2020-03-24 | 广州小鹏汽车科技有限公司 | Short-circuit fault protection circuit and method, vehicle and storage medium |
| CN210982685U (en) * | 2019-08-31 | 2020-07-10 | 比亚迪股份有限公司 | High-voltage monitoring module, battery management system and vehicle |
| CN111746286A (en) * | 2020-06-24 | 2020-10-09 | 广州小鹏汽车科技有限公司 | Power battery high-voltage loop control circuit, protection method, vehicle and storage medium |
| CN112350271A (en) * | 2019-08-09 | 2021-02-09 | 广州汽车集团股份有限公司 | Power battery overcurrent protection method and system and battery manager |
| CN112606692A (en) * | 2020-12-28 | 2021-04-06 | 重庆大学 | Electric automobile safety protection device and method |
| CN112731169A (en) * | 2020-12-22 | 2021-04-30 | 上汽大众汽车有限公司 | All-weather monitoring system and method for thermal runaway of power battery |
| CN113119737A (en) * | 2021-04-28 | 2021-07-16 | 中国第一汽车股份有限公司 | Power battery thermal runaway monitoring device and method and power battery system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102264409B1 (en) * | 2018-03-16 | 2021-06-21 | 주식회사 엘지에너지솔루션 | Integrated switching apparatus |
-
2021
- 2021-07-28 CN CN202110856740.5A patent/CN113745768B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544215A (en) * | 2009-05-12 | 2009-09-30 | 奇瑞汽车股份有限公司 | High-voltage double-loop safety system of electric vehicle and method thereof |
| CN104786846A (en) * | 2015-04-07 | 2015-07-22 | 安徽江淮汽车股份有限公司 | Electrical safety protection method, module and system for electric automobile |
| KR101795319B1 (en) * | 2016-12-13 | 2017-12-01 | 현대자동차주식회사 | System and method for detecting opening of fuse in high voltage system of vehicle |
| JP2018133910A (en) * | 2017-02-15 | 2018-08-23 | 株式会社デンソー | Power supply circuit |
| CN112350271A (en) * | 2019-08-09 | 2021-02-09 | 广州汽车集团股份有限公司 | Power battery overcurrent protection method and system and battery manager |
| CN210982685U (en) * | 2019-08-31 | 2020-07-10 | 比亚迪股份有限公司 | High-voltage monitoring module, battery management system and vehicle |
| CN110782633A (en) * | 2019-10-31 | 2020-02-11 | 重庆长安新能源汽车科技有限公司 | New energy automobile power battery thermal runaway alarm system and method |
| CN110912085A (en) * | 2019-12-03 | 2020-03-24 | 广州小鹏汽车科技有限公司 | Short-circuit fault protection circuit and method, vehicle and storage medium |
| CN111746286A (en) * | 2020-06-24 | 2020-10-09 | 广州小鹏汽车科技有限公司 | Power battery high-voltage loop control circuit, protection method, vehicle and storage medium |
| CN112731169A (en) * | 2020-12-22 | 2021-04-30 | 上汽大众汽车有限公司 | All-weather monitoring system and method for thermal runaway of power battery |
| CN112606692A (en) * | 2020-12-28 | 2021-04-06 | 重庆大学 | Electric automobile safety protection device and method |
| CN113119737A (en) * | 2021-04-28 | 2021-07-16 | 中国第一汽车股份有限公司 | Power battery thermal runaway monitoring device and method and power battery system |
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|---|---|
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