CN109540404B - Liquid leakage detection device and method and battery system - Google Patents
Liquid leakage detection device and method and battery system Download PDFInfo
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- CN109540404B CN109540404B CN201811386050.2A CN201811386050A CN109540404B CN 109540404 B CN109540404 B CN 109540404B CN 201811386050 A CN201811386050 A CN 201811386050A CN 109540404 B CN109540404 B CN 109540404B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
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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
- H01M10/4285—Testing apparatus
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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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Abstract
The application provides a liquid leakage detection apparatus, a method and a battery system. The device is applied to a battery system comprising a battery box body, a waterproof vent valve and a plurality of battery units, and comprises a first humidity acquisition unit, a second humidity acquisition unit and a data processing unit; the first humidity acquisition unit and the second humidity acquisition unit are respectively arranged inside and outside the battery box body and are used for respectively acquiring humidity data inside and outside the battery box body according to a preset time interval and sending the acquired humidity data to the data processing unit; the data processing unit is arranged outside the battery box body and used for receiving humidity data inside and outside the battery box body and calculating the change rate of the internal humidity so as to judge whether liquid leakage occurs inside the battery box body according to the change rate of the internal humidity. The device has the advantages of simple structure and low manufacturing difficulty, and can monitor and detect the liquid leakage condition in the battery system so as to ensure the power supply performance and the power supply safety of the battery system and avoid serious loss.
Description
Technical Field
The application relates to the technical field of battery system leakage detection, in particular to liquid leakage detection equipment and method and a battery system.
Background
With the rapid development of electronic technology, the use of pure electric and hybrid electric vehicles is becoming more and more popular, the requirements of the pure electric and hybrid electric vehicles on high-performance and high-reliability battery systems are also continuously improved, the existence of the battery systems provides corresponding appropriate and stable electric energy for the pure electric and hybrid electric vehicles, so that the pure electric and hybrid electric vehicles can normally run and exert corresponding performance, and the safe reliability and the electric energy output stability of the battery systems correspondingly determine the running states of the pure electric and hybrid electric vehicles. However, there are many technical problems to be solved in the battery system, and the safety problems of the battery system and the pure electric and hybrid electric vehicles are one of the most important problems.
The battery system is a very complicated power supply system, and when a battery core in the battery system fails, an electrical component (e.g., a relay) fails or a thermal management device fails, liquid leakage may occur inside the battery system, which may easily affect the power supply performance and the power supply safety of the battery system.
However, currently, there is no system device available on the market that can monitor and detect the liquid leakage state inside the battery system, so as to prevent the power supply performance and power supply safety of the battery system from being problematic and avoid causing serious loss. Therefore, it is an urgent technical problem for those skilled in the art to provide a detection device that has a simple structure and low manufacturing difficulty and can monitor the liquid leakage state inside the battery system.
Content of application
In order to overcome the defects in the prior art, the present application aims to provide a liquid leakage detection device, a method and a battery system, wherein the liquid leakage detection device has a simple structure and low manufacturing difficulty, and can monitor and detect the liquid leakage condition inside the battery system, so as to ensure the power supply performance and the power supply safety of the battery system and avoid causing serious loss.
In terms of equipment, the embodiment of the application provides liquid leakage detection equipment, which is applied to a battery system, wherein the battery system comprises a battery box body, a waterproof vent valve and a plurality of battery units, the plurality of battery units are arranged in the battery box body, and the waterproof vent valve is arranged on one box body side surface of the battery box body so as to be communicated with the inside and the outside of the battery box body. The equipment comprises a first humidity acquisition unit, a second humidity acquisition unit and a data processing unit;
the first humidity acquisition unit is arranged in the battery box body, the second humidity acquisition unit is arranged outside the battery box body, and the first humidity acquisition unit and the second humidity acquisition unit respectively acquire humidity data in the battery box body and humidity data outside the battery box body according to a preset time interval and send the acquired humidity data to the data processing unit;
the data processing unit is arranged outside the battery box body, receives humidity data inside and outside the battery box body, calculates the internal humidity change rate of the humidity inside the battery box body under the action of the humidity outside the battery box body according to the humidity data inside and outside the battery box body received twice, and judges whether liquid leakage occurs inside the battery box body according to the obtained internal humidity change rate.
Optionally, in this embodiment of the application, the battery box is a hollow cavity structure, and the first humidity acquisition unit includes a first humidity sensor, a first controller, and a first data transmitter;
the first controller is electrically connected with the first humidity sensor and is used for controlling the first humidity sensor to perform data acquisition on humidity data in the battery box at preset time intervals, wherein the first humidity sensor is arranged on the bottom of a cavity in the battery box and is close to the plurality of battery units;
the first controller is electrically connected with the first data transmitter and is used for controlling the first data transmitter to send the humidity data acquired by the first humidity sensor to the data processing unit.
Optionally, in this embodiment of the application, the second humidity acquiring unit includes a second humidity sensor, a second controller, and a second data transmitter;
the second controller is electrically connected with the second humidity sensor and is used for controlling the second humidity sensor to acquire humidity data outside the battery box at preset time intervals, wherein the second humidity sensor is arranged on the outer surface outside the battery box and close to the waterproof vent valve;
the second controller is electrically connected with the second data transmitter and is used for controlling the second data transmitter to send the humidity data acquired by the second humidity sensor to the data processing unit.
Optionally, in an embodiment of the present application, the data processing unit includes a data receiver and a processor;
the data receiver is in communication connection with the first data transmitter and the second data transmitter and is used for receiving humidity data in the battery box body from the first data transmitter and humidity data outside the battery box body from the second data transmitter;
the processor is electrically connected with the data receiver and used for calculating an external humidity change value, an internal humidity change value and an internal and external humidity difference value of the battery box corresponding to the adjacent two data receiving processes according to the received internal and external humidity data of the battery box, calculating an internal humidity change rate of the internal humidity of the battery box in a time period corresponding to a preset time interval under the action of the external humidity of the battery box based on the external humidity change value, the internal humidity change value and the internal and external humidity difference values, judging whether the internal humidity change rate is in a preset humidity change rate range or not, and judging that liquid leakage occurs in the battery box when the internal humidity change rate is not in the preset humidity change rate range.
Optionally, in this embodiment of the present application, the apparatus further includes an alarm unit;
the alarm unit is electrically connected with the data processing unit and used for sending out an alarm prompt when the data processing unit judges that liquid leakage occurs in the battery box body.
Optionally, in this embodiment of the present application, the first humidity sensor is a humidity-sensitive resistor or a humidity-sensitive capacitor, and the second humidity sensor is a humidity-sensitive resistor or a humidity-sensitive capacitor.
As for a method, an embodiment of the present application provides a liquid leakage detection method applied to any one of the above-described liquid leakage detection apparatuses, the method including:
the first humidity acquisition unit acquires humidity data in the battery box at intervals according to preset time and sends the acquired humidity data in the battery box to the data processing unit;
the second humidity acquisition unit acquires humidity data outside the battery box body at preset time intervals and sends the acquired humidity data outside the battery box body to the data processing unit;
the data processing unit calculates the internal humidity change rate of the internal humidity of the battery box under the action of the external humidity of the battery box according to the received humidity data inside and outside the battery box at two adjacent times, and judges whether liquid leakage occurs inside the battery box according to the internal humidity change rate.
Optionally, in this embodiment of the application, the above device stores a preset humidity change rate range for the inside of the battery box, where the preset humidity change rate range is used for indicating that the humidity change inside the battery box matches the humidity change outside the battery box, and the step of calculating, by the data processing unit, an inside humidity change rate of the inside humidity of the battery box under the action of the outside humidity of the battery box according to the received humidity data inside and outside the battery box twice, and determining whether liquid leakage occurs inside the battery box according to the inside humidity change rate includes:
calculating an external humidity change value, an internal humidity change value and an internal and external humidity difference value of the battery box body corresponding to two adjacent data receiving processes according to the received humidity data inside and outside the battery box body;
calculating the internal humidity change rate of the internal humidity of the battery box in the time period corresponding to the preset time interval under the action of the external humidity of the battery box based on the external humidity change value, the internal humidity change value and the internal and external humidity difference values;
and judging whether the internal humidity change rate is within a preset humidity change rate range or not, and judging that liquid leakage occurs in the battery box body when the internal humidity change rate is not within the preset humidity change rate range.
Optionally, in this embodiment of the application, if the device includes an alarm unit, the method further includes:
and if the data processing unit judges that liquid leakage occurs in the battery box body, the data processing unit controls the alarm unit to send out an alarm prompt.
In terms of a system, the present application provides a battery system, which includes a battery box, a waterproof vent valve, a plurality of battery cells, and any one of the above-mentioned liquid leakage detection devices;
the battery box comprises a plurality of battery units, a waterproof vent valve and a liquid leakage detection device, wherein the battery units are arranged in the battery box body, the waterproof vent valve is arranged on one box body side surface of the battery box body to communicate the inside and the outside of the battery box body, and the liquid leakage detection device is used for detecting whether liquid leakage occurs in the battery box body.
Compared with the prior art, the liquid leakage detection device, the liquid leakage detection method and the battery system provided by the embodiment of the application have the following beneficial effects: the liquid leakage detection equipment is simple in structure and low in manufacturing difficulty, and can monitor and detect the liquid leakage condition inside the battery system so as to ensure the power supply performance and the power supply safety of the battery system and avoid serious loss. The liquid leakage detection equipment is applied to a battery system, the battery system comprises a battery box body, a waterproof vent valve and a plurality of battery units, the plurality of battery units are arranged in the battery box body, and the waterproof vent valve is arranged on one box body side surface of the battery box body to communicate the inside and the outside of the battery box body. The equipment comprises a first humidity acquisition unit, a second humidity acquisition unit and a data processing unit. The first humidity acquisition unit is arranged in the battery box body, the second humidity acquisition unit is arranged outside the battery box body, and the first humidity acquisition unit and the second humidity acquisition unit respectively acquire humidity data in the battery box body and humidity data outside the battery box body according to a preset time interval and send the acquired humidity data to the data processing unit. The data processing unit sets up outside the battery box, the data processing unit receives the humidity data inside and outside the battery box to receive according to adjacent twice the humidity data inside and outside the battery box calculates the inside humidity rate of change of battery box is in inside humidity rate of change under the effect of the outside humidity of battery box judges according to the inside humidity rate of change of rate whether liquid leakage appears in the battery box, thereby realizes monitoring and detecting the inside liquid leakage situation of battery system, ensures the power supply performance and the power supply security of battery system avoid causing serious loss.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the claims of the present application, and it is obvious for those skilled in the art that other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure.
Fig. 2 is a schematic block diagram of a liquid leakage detection apparatus according to an embodiment of the present disclosure.
Fig. 3 is a schematic block diagram of a first humidity acquisition unit according to an embodiment of the present disclosure.
Fig. 4 is a schematic block diagram of a second humidity acquisition unit according to an embodiment of the present disclosure.
Fig. 5 is a block diagram of a data processing unit according to an embodiment of the present application.
Fig. 6 is another block diagram of a liquid leakage detection apparatus according to an embodiment of the present disclosure.
Fig. 7 is a schematic flow chart of a liquid leakage detection method according to an embodiment of the present disclosure.
Fig. 8 is a flowchart illustrating sub-steps included in step S330 shown in fig. 7.
Fig. 9 is another schematic flow chart of a liquid leakage detection method according to an embodiment of the present application.
Icon: 10-a battery system; 11-a battery case; 12-waterproof vent valve; 13-a battery cell; 100-liquid leak detection equipment; 110-a first humidity acquisition unit; 120-a second humidity acquisition unit; 111-a first humidity sensor; 112-a first controller; 113-a first data transmitter; 121-a second humidity sensor; 122-a second controller; 123-a second data transmitter; 130-a data processing unit; 131-a data receiver; 132-a processor; 133-a memory; 140-alarm unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is noted that the terms "first", "second", "third", and the like are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of a battery system 10 according to an embodiment of the present disclosure. In the embodiment of the present application, the battery system 10 includes a battery case 11, a waterproof vent valve 12, a liquid leakage detection apparatus 100, and a plurality of battery cells 13. The battery box 11 is a hollow cavity structure, and the battery units 13 are arranged in the battery box 11 to realize the power supply function of the battery system 10.
In this embodiment, the battery unit 13 is a core component for implementing a power supply function of the battery system 10, and the battery unit 13 may include a battery module, an electrical component (e.g., a relay) for implementing the power supply function in cooperation with the battery module, and a thermal management device for protecting the battery module. The battery module cooperates with the electrical component and the thermal management device to achieve the power supply function of the battery system 10.
It is understood that the battery module, the electrical component and the thermal management device are only one embodiment of the battery unit 13 provided in the embodiments of the present application, and the present application may further include more embodiments of the battery unit 13.
In the present embodiment, the waterproof vent valve 12 is provided on one case side surface of the battery case 11 to communicate the inside and the outside of the battery case 11, and establish a gas exchange path between the inside of the battery case 11 and the outside of the battery case 11. The waterproof vent valve 12 uses polytetrafluoroethylene with a puffed microstructure which is a microporous structure as a vent membrane body, so that the waterproof vent valve 12 can prevent liquid and dust from passing through the vent membrane body of the waterproof vent valve 12 and allow gas to penetrate through the vent membrane body of the waterproof vent valve 12.
In this embodiment, if liquid (for example, water vapor) is contaminated outside the battery case 11 and is in the waterproof vent valve 12, the liquid will not penetrate through the waterproof vent valve 12 and enter the battery case 11; if gas (for example, water vapor) exists outside the battery case 11, the gas can penetrate into the battery case 11 through the waterproof vent valve 12; if liquid (for example, water vapor) in the battery box body 11 is contaminated by the waterproof vent valve 12, the liquid cannot penetrate through the waterproof vent valve 12 and enter the outside of the battery box body 11; if gas (for example, water vapor) exists in the battery case 11, the gas can be transmitted to the outside of the battery case 11 through the waterproof vent valve 12. Therefore, when there is no liquid leakage in the battery case 11, the humidity inside the battery case 11 is kept consistent with the humidity outside the battery case 11 based on the waterproof vent valve 12, and at this time, the humidity inside the battery case 11 changes only with the change in the humidity outside the battery case 11.
Referring to fig. 1 and fig. 2 in combination, fig. 2 is a block diagram of a liquid leakage detection apparatus 100 according to an embodiment of the present disclosure. In the embodiment of the present application, the liquid leakage detection apparatus 100 has a simple structure and a low manufacturing difficulty, and can monitor and detect the liquid leakage condition inside the battery system 10, so as to ensure the power supply performance and the power supply safety of the battery system 10 and avoid causing serious loss. The liquid leakage detection apparatus 100 includes a first humidity acquisition unit 110, a second humidity acquisition unit 120, and a data processing unit 130, where the first humidity acquisition unit 110 and the second humidity acquisition unit 120 are configured to acquire humidity data, and the data processing unit 130 is configured to determine whether liquid leakage occurs inside the battery system 10. The first humidity acquisition unit 110 and the second humidity acquisition unit 120 are respectively in communication connection with the data processing unit 130 to realize data transmission or interaction. In this embodiment, the first humidity acquisition unit 110 and the second humidity acquisition unit 120 may be respectively connected to the data processing unit 130 in a wireless communication manner or a wired communication manner.
In this embodiment, the first humidity acquisition unit 110 is disposed in the battery box 11, the second humidity acquisition unit 120 is disposed outside the battery box 11, and the first humidity acquisition unit 110 and the second humidity acquisition unit 120 respectively acquire the humidity data in the battery box 11 and the humidity data outside the battery box 11 at preset time intervals and send the acquired humidity data to the data processing unit 130. The preset time interval may be 30 seconds, 45 seconds, or 1 minute, and the specific value may be configured differently according to the requirement.
Fig. 3 is a schematic block diagram of the first humidity collecting unit 110 according to an embodiment of the present disclosure. In this embodiment, the first humidity acquisition unit 110 includes a first humidity sensor 111, a first controller 112 and a first data transmitter 113. The first controller 112 is electrically connected to the first humidity sensor 111, and is configured to control the first humidity sensor 111 to perform data acquisition on humidity data in the battery box 11 at preset time intervals, where the first humidity sensor 111 is disposed at a position on a bottom of a cavity in the battery box 11 and close to the plurality of battery units 13. The first controller 112 is electrically connected to the first data transmitter 113, and is configured to control the first data transmitter 113 to send the humidity data collected by the first humidity sensor 111 to the data processing unit 130.
In this embodiment, the first humidity sensor 111 may be a humidity-sensitive resistor or a humidity-sensitive capacitor. The first data transmitter 113 may include a wired data transmission module and a wireless data transmission module, the first data transmitter 113 sends the humidity data collected by the first humidity sensor 111 to the data processing unit 130 through the wired data transmission module, the first data transmitter 113 sends the humidity data collected by the first humidity sensor 111 to the data processing unit 130 through the wireless data transmission module, and specific data transmission modes may be set differently according to requirements.
Fig. 4 is a schematic block diagram of a second humidity collecting unit 120 according to an embodiment of the present disclosure. In this embodiment, the second humidity acquisition unit 120 includes a second humidity sensor 121, a second controller 122 and a second data transmitter 123. The second controller 122 is electrically connected to the second humidity sensor 121, and is configured to control the second humidity sensor 121 to perform data acquisition on humidity data outside the battery box 11 at preset time intervals, where the second humidity sensor 121 is disposed on an outer surface outside the battery box 11 and near the waterproof vent valve 12. The second controller 122 is electrically connected to the second data transmitter 123, and is configured to control the second data transmitter 123 to send the humidity data acquired by the second humidity sensor 121 to the data processing unit 130.
In this embodiment, the second humidity sensor 121 may be a humidity-sensitive resistor or a humidity-sensitive capacitor. The second data transmitter 123 may include a wired data transmission module and a wireless data transmission module, the second data transmitter 123 transmits the humidity data acquired by the second humidity sensor 121 to the data processing unit 130 through the wired data transmission module, the second data transmitter 123 transmits the humidity data acquired by the second humidity sensor 121 to the data processing unit 130 through the wireless data transmission module, and specific data transmission modes may be set differently according to requirements.
Referring to fig. 2 again, in this embodiment, the data processing unit 130 is disposed outside the battery box 11, and is configured to receive humidity data inside and outside the battery box 11, and calculate an internal humidity change rate of the humidity inside the battery box 11 under the action of the humidity outside the battery box 11 according to the humidity data inside and outside the battery box 11 received twice, so as to determine whether liquid leakage occurs inside the battery box 11 according to the obtained internal humidity change rate.
Specifically, please refer to fig. 5, which is a block diagram illustrating the data processing unit 130 according to an embodiment of the present disclosure. In the present embodiment, the data processing unit 130 includes a data receiver 131, a processor 132 and a memory 133.
The data receiver 131 is communicatively connected to the first data transmitter 113 and the second data transmitter 123, and is configured to receive humidity data inside the battery box 11 from the first data transmitter 113 and humidity data outside the battery box 11 from the second data transmitter 123.
The processor 132 is electrically connected to the data receiver 131, and is configured to determine whether liquid leakage occurs inside the battery box 11 according to the humidity data inside and outside the battery box 11 received by the data receiver 131. The processor 132 calculates an external humidity change value, an internal humidity change value, and an internal and external humidity difference value of the battery box 11 corresponding to two adjacent data receiving processes according to the received internal and external humidity data of the battery box 11, calculates an internal humidity change rate of the internal humidity of the battery box 11 in a time period corresponding to the preset time interval under the action of the external humidity of the battery box 11 based on the external humidity change value, the internal humidity change value, and the internal and external humidity difference values, determines whether the internal humidity change rate is within a preset humidity change rate range, and determines that liquid leakage occurs inside the battery box 11 when the internal humidity change rate is not within the preset humidity change rate range.
The memory 133 is disposed between the data receiver 131 and the processor 132, and electrically connected to the data receiver 131 and the processor 132, and is configured to store the humidity data received by the data receiver 131, and also to store a preset humidity change rate range and a preset humidity change rate calculation model. The rate calculation model is used for calculating the internal humidity change rate of the internal humidity of the battery box body 11 in the time period corresponding to the preset time interval under the action of the external humidity of the battery box body 11 when no leakage exists in the battery box body 11 and the internal humidity of the battery box body 11 only changes along with the change of the external humidity of the battery box body 11. The preset humidity change rate range is used for representing a humidity change rate numerical range, matched with the humidity change outside the battery box 11, of the inside of the battery box 11. The input parameters of the rate calculation model include an external humidity change value and an internal humidity change value of the battery box body 11 obtained in two adjacent data acquisition processes, and internal and external humidity difference values of the battery box body 11 corresponding to the two data acquisition processes, and the output parameters of the rate calculation model are internal humidity change rates of the internal humidity of the battery box body 11 in a time period between the two adjacent data acquisition processes under the action of the external humidity of the battery box body 11.
When liquid leakage occurs inside the battery box 11, the internal humidity change rate calculated by the processor 132 based on the two adjacent received humidity data inside and outside the battery box 11 will be outside the preset humidity change rate range.
In this embodiment, the memory 133 is further configured to store software function modules, computer programs, and the like required by the liquid leakage detection apparatus 100 to determine whether a liquid leakage occurs in the battery case 11, and is further configured to store the preset humidity threshold. The Memory 133 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
Fig. 6 is another block diagram of the liquid leakage detecting apparatus 100 according to the embodiment of the present disclosure. In this embodiment, the liquid leakage detecting apparatus 100 may further include an alarm unit 140, where the alarm unit 140 is electrically connected to the data processing unit 130, and is configured to send an alarm prompt when the data processing unit 130 determines that liquid leakage occurs inside the battery box 11. The alarm unit 140 may include an alarm generator, and the alarm unit 140 may issue an alarm prompt through the alarm generator.
Fig. 7 is a schematic flow chart of a liquid leakage detection method according to an embodiment of the present application. In the embodiment of the present application, the liquid leakage detection method is applied to the liquid leakage detection apparatus 100 described above, and the specific flow and steps of the liquid leakage detection method shown in fig. 7 are described in detail below.
In step S310, the first humidity collecting unit 110 collects humidity data in the battery box 11 at preset time intervals, and sends the collected humidity data in the battery box 11 to the data processing unit 130.
In step S320, the second humidity collecting unit 120 collects humidity data outside the battery box 11 at preset time intervals, and sends the collected humidity data outside the battery box 11 to the data processing unit 130.
In step S330, the data processing unit 130 calculates an internal humidity change rate of the internal humidity of the battery box 11 under the action of the external humidity of the battery box 11 according to the received humidity data inside and outside the battery box 11 at two adjacent times, and determines whether liquid leakage occurs inside the battery box 11 according to the internal humidity change rate.
Optionally, please refer to fig. 8, which is a flowchart illustrating the sub-steps included in step S330 shown in fig. 7. In this embodiment, the liquid leakage detecting apparatus 100 stores a preset humidity threshold, and the step S330 includes a sub-step S331 and a sub-step S332.
And a substep S331 of calculating an external humidity change value, an internal humidity change value, and an internal and external humidity difference value of the battery box 11 corresponding to the two adjacent data receiving processes according to the received humidity data inside and outside the battery box 11.
In the substep S332, based on the external humidity change value, the internal humidity change value, and the difference between the internal humidity and the external humidity, the internal humidity change rate of the internal humidity of the battery box 11 in the time period corresponding to the preset time interval under the action of the external humidity of the battery box 11 is calculated.
Step S333, determining whether the internal humidity change rate is within a preset humidity change rate range, and if not, determining that liquid leakage occurs inside the battery case 11.
Fig. 9 is a schematic flow chart of a liquid leakage detection method according to an embodiment of the present application. In this embodiment, if the liquid leakage detecting apparatus 100 includes the alarm unit 140, the method may further include step S340.
In step S340, if the data processing unit 130 determines that the liquid leakage occurs inside the battery box 11, the data processing unit 130 controls the alarm unit 140 to issue an alarm prompt.
In summary, in the liquid leakage detection device, the liquid leakage detection method and the battery system provided in the embodiments of the present application, the liquid leakage detection device has a simple structure and low manufacturing difficulty, and can monitor and detect the liquid leakage condition inside the battery system, so as to ensure the power supply performance and the power supply safety of the battery system and avoid causing serious loss. The liquid leakage detection equipment is applied to a battery system, the battery system comprises a battery box body, a waterproof vent valve and a plurality of battery units, the plurality of battery units are arranged in the battery box body, and the waterproof vent valve is arranged on one box body side surface of the battery box body to communicate the inside and the outside of the battery box body. The equipment comprises a first humidity acquisition unit, a second humidity acquisition unit and a data processing unit. The first humidity acquisition unit is arranged in the battery box body, the second humidity acquisition unit is arranged outside the battery box body, and the first humidity acquisition unit and the second humidity acquisition unit respectively acquire humidity data in the battery box body and humidity data outside the battery box body according to a preset time interval and send the acquired humidity data to the data processing unit. The data processing unit sets up outside the battery box, the data processing unit receives the humidity data inside and outside the battery box to receive according to adjacent twice the humidity data inside and outside the battery box calculates the inside humidity rate of change of battery box is in inside humidity rate of change under the effect of the outside humidity of battery box judges according to the inside humidity rate of change of rate whether liquid leakage appears in the battery box, thereby realizes monitoring and detecting the inside liquid leakage situation of battery system, ensures the power supply performance and the power supply security of battery system avoid causing serious loss.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. The liquid leakage detection equipment is applied to a battery system, the battery system comprises a battery box body, a waterproof vent valve and a plurality of battery units, the battery units are arranged in the battery box body, and the waterproof vent valve is arranged on one box body side surface of the battery box body so as to be communicated with the inside and the outside of the battery box body;
the first humidity acquisition unit is arranged in the battery box body, the second humidity acquisition unit is arranged outside the battery box body, and the first humidity acquisition unit and the second humidity acquisition unit respectively acquire humidity data in the battery box body and humidity data outside the battery box body according to a preset time interval and send the acquired humidity data to the data processing unit;
the data processing unit is arranged outside the battery box body, receives humidity data inside and outside the battery box body, calculates the internal humidity change rate of the humidity inside the battery box body under the action of the humidity outside the battery box body according to the humidity data inside and outside the battery box body received twice in a neighboring mode, and judges whether liquid leakage occurs inside the battery box body according to the obtained internal humidity change rate;
the battery box body is of a hollow cavity structure, and the first humidity acquisition unit comprises a first humidity sensor, a first controller and a first data transmitter;
the first controller is electrically connected with the first humidity sensor and is used for controlling the first humidity sensor to perform data acquisition on humidity data in the battery box at preset time intervals, wherein the first humidity sensor is arranged on the bottom of a cavity in the battery box and is close to the plurality of battery units;
the first controller is electrically connected with the first data transmitter and is used for controlling the first data transmitter to send the humidity data acquired by the first humidity sensor to the data processing unit;
the second humidity acquisition unit comprises a second humidity sensor, a second controller and a second data transmitter;
the second controller is electrically connected with the second humidity sensor and is used for controlling the second humidity sensor to acquire humidity data outside the battery box at preset time intervals, wherein the second humidity sensor is arranged on the outer surface outside the battery box and close to the waterproof vent valve;
the second controller is electrically connected with the second data transmitter and is used for controlling the second data transmitter to send the humidity data acquired by the second humidity sensor to the data processing unit;
the data processing unit comprises a data receiver and a processor;
the data receiver is in communication connection with the first data transmitter and the second data transmitter and is used for receiving humidity data in the battery box body from the first data transmitter and humidity data outside the battery box body from the second data transmitter;
the processor is electrically connected with the data receiver and used for calculating an external humidity change value, an internal humidity change value and an internal and external humidity difference value of the battery box corresponding to the adjacent two data receiving processes according to the received internal and external humidity data of the battery box, calculating an internal humidity change rate of the internal humidity of the battery box in a time period corresponding to a preset time interval under the action of the external humidity of the battery box based on the external humidity change value, the internal humidity change value and the internal and external humidity difference values, judging whether the internal humidity change rate is in a preset humidity change rate range or not, and judging that liquid leakage occurs in the battery box when the internal humidity change rate is not in the preset humidity change rate range.
2. The apparatus according to claim 1, characterized in that it further comprises an alarm unit;
the alarm unit is electrically connected with the data processing unit and used for sending out an alarm prompt when the data processing unit judges that liquid leakage occurs in the battery box body.
3. The apparatus of any of claims 1-2, wherein the first humidity sensor is a humidity sensitive resistor or a humidity sensitive capacitor and the second humidity sensor is a humidity sensitive resistor or a humidity sensitive capacitor.
4. A liquid leak detection method applied to the liquid leak detection apparatus according to any one of claims 1 to 3, the method comprising:
the first humidity acquisition unit acquires humidity data in the battery box at intervals according to preset time and sends the acquired humidity data in the battery box to the data processing unit;
the second humidity acquisition unit acquires humidity data outside the battery box body at preset time intervals and sends the acquired humidity data outside the battery box body to the data processing unit;
the data processing unit calculates the internal humidity change rate of the internal humidity of the battery box under the action of the external humidity of the battery box according to the received humidity data inside and outside the battery box at two adjacent times, and judges whether liquid leakage occurs inside the battery box according to the internal humidity change rate;
the device is provided with a preset humidity change rate range which is used for representing the matching between the humidity change inside the battery box body and the humidity change outside the battery box body and aims at the inside of the battery box body, the data processing unit calculates the internal humidity change rate of the humidity inside the battery box body under the action of the humidity outside the battery box body according to the humidity data inside and outside the battery box body received twice, and the step of judging whether liquid leakage occurs inside the battery box body according to the internal humidity change rate comprises the following steps:
calculating an external humidity change value, an internal humidity change value and an internal and external humidity difference value of the battery box body corresponding to two adjacent data receiving processes according to the received humidity data inside and outside the battery box body;
calculating the internal humidity change rate of the internal humidity of the battery box in the time period corresponding to the preset time interval under the action of the external humidity of the battery box based on the external humidity change value, the internal humidity change value and the internal and external humidity difference values;
and judging whether the internal humidity change rate is within a preset humidity change rate range or not, and judging that liquid leakage occurs in the battery box body when the internal humidity change rate is not within the preset humidity change rate range.
5. The method of claim 4, wherein if the device includes an alarm unit, the method further comprises:
and if the data processing unit judges that liquid leakage occurs in the battery box body, the data processing unit controls the alarm unit to send out an alarm prompt.
6. A battery system, characterized in that the battery system comprises a battery case, a waterproof vent valve, a plurality of battery cells, and the liquid leakage detection apparatus of any one of claims 1 to 3;
the battery box comprises a plurality of battery units, a waterproof vent valve and a liquid leakage detection device, wherein the battery units are arranged in the battery box body, the waterproof vent valve is arranged on one box body side surface of the battery box body to communicate the inside and the outside of the battery box body, and the liquid leakage detection device is used for detecting whether liquid leakage occurs in the battery box body.
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| CN201811386050.2A CN109540404B (en) | 2018-11-20 | 2018-11-20 | Liquid leakage detection device and method and battery system |
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| JP2003240666A (en) * | 2002-02-19 | 2003-08-27 | Mitsubishi Electric Corp | Airtightness monitoring device for casing |
| CN102042899B (en) * | 2009-10-21 | 2014-11-12 | 浙江华仪电器科技有限公司 | Device and method for detecting gas leakage of sulfur hexafluoride high pressure vacuum switch |
| CN206410825U (en) * | 2016-12-29 | 2017-08-15 | 福建易动力电子科技股份有限公司 | Battery bag air-leakage test structure |
| CN206479297U (en) * | 2017-01-18 | 2017-09-08 | 宋玲 | A kind of automobile batteries case air-tightness automatic detection device |
| CN207199702U (en) * | 2017-08-11 | 2018-04-06 | 安徽华凯新能源科技有限公司 | Dynamic lithium battery group Packed battery cases |
| CN108120563A (en) * | 2018-01-16 | 2018-06-05 | 上海禹舜电气有限公司 | Differential humidity leak-detecting device, leak hunting method and the system of double water innercooling electric generator |
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