CN112684357A - Battery module overcharge and overdischarge safety detection system and method - Google Patents
Battery module overcharge and overdischarge safety detection system and method Download PDFInfo
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- CN112684357A CN112684357A CN202011557249.4A CN202011557249A CN112684357A CN 112684357 A CN112684357 A CN 112684357A CN 202011557249 A CN202011557249 A CN 202011557249A CN 112684357 A CN112684357 A CN 112684357A
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Abstract
The invention relates to a system and a method for detecting the overcharge and overdischarge safety of a battery module, which comprises a detection device, a detection assembly arranged in the detection device and a control assembly electrically connected with the detection assembly; the detection device comprises a detection container, a spraying pipeline and a cooling pipeline which are arranged at the bottom of the detection container, and a smoke pipeline arranged at the top of the detection container; the detection assembly comprises a temperature sensor, a smoke concentration sensor, a flame sensor and a voltage detection sensor, and the control assembly comprises a cooling electromagnetic valve, a spraying electromagnetic valve, a smoke electromagnetic valve and a charging and discharging device which are electrically connected with the controller. The invention can improve the detection efficiency and safety of products, simultaneously improves the disassembly and assembly flexibility of detection equipment, and solves the problems that the detection efficiency is low because a fixed detection device is adopted in the safety test of the existing battery module, the tested object is processed in a mode of infinitely prolonging the standing time, the functions of quick cooling and spraying fire extinguishing are not provided, and the disassembly and assembly are not convenient.
Description
Technical Field
The invention relates to the technical field of safety detection of energy storage components, in particular to a system and a method for detecting overcharge and overdischarge safety of a battery module.
Background
Battery (Battery) refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or portion of a composite container that holds an electrolyte solution and metal electrodes to generate an electric current. With the advancement of technology, batteries generally refer to small devices that can generate electrical energy. The battery is used as an energy source, can obtain current which has stable voltage and current, is stably supplied for a long time and is slightly influenced by the outside, has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects of modern social life.
It is well known that many industries that produce or use batteries test the batteries before they are put into service. At present, adopt fixed detection device in the security test to battery module to the mode processing that the time of infinitely extending stewing is surveyed to, do not possess quick cooling and spray the function of putting out a fire, and the dismouting of being not convenient for leads to detection efficiency low.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a system and a method for detecting overcharge and overdischarge safety of a battery module, which can improve the detection efficiency and safety of products and improve the flexibility of assembling and disassembling detection equipment.
A safety detection system for overcharge and overdischarge of a battery module comprises a detection device, a detection assembly and a control assembly, wherein the detection assembly is arranged in the detection device, and the control assembly is electrically connected with the detection assembly; the detection device comprises a detection container, a spraying pipeline and a cooling pipeline which are arranged at the bottom of the detection container, and a smoke pipeline arranged at the top of the detection container; the detection assembly comprises a temperature sensor, a smoke concentration sensor, a flame sensor and a voltage detection sensor; the control assembly comprises a cooling electromagnetic valve, a spraying electromagnetic valve, a smoke electromagnetic valve and a charging and discharging device which are electrically connected with the controller.
In addition, the battery module overcharge and overdischarge safety detection system provided by the invention can also have the following additional technical characteristics:
furthermore, the top of detecting the container is equipped with smog pipeline interface, at least one side of detecting the container is equipped with pin hole or observation window, it is equipped with the first mounting hole that is used for installing the pipeline that sprays to detect on the container is close to bottom two relative sides, it is equipped with the second mounting hole that is used for installing the cooling pipeline to detect on the container is close to another relative two sides in bottom.
Further, the cooling solenoid valve, the spraying solenoid valve and the smoke solenoid valve are respectively installed on the cooling pipeline, the spraying pipeline and the smoke pipeline; and a heat-conducting soft cushion with the thickness ranging from 2 mm to 5mm is paved on the surface of one side, close to the spray pipe, of the cooling pipeline.
Furthermore, the spraying pipeline comprises a square spraying pipe, and a spraying pipe water inlet and a spraying pipe blind head which are respectively arranged at two opposite sides of the spraying pipe, wherein a plurality of spraying openings are formed in the spraying pipe, and a filter screen is arranged at the spraying opening.
Furthermore, the cooling pipeline comprises a square cooling pipe, a cooling pipe water inlet and a cooling pipe water outlet which are respectively arranged at two opposite sides of the cooling pipe, and a cooling pipe blind head arranged at the other opposite side of the cooling pipe.
Further, the cross-sectional area of the shower pipe is larger than that of the cooling pipe.
Further, the diameter of the smoke pipeline interface is 150mm, the diameter of the lead hole or the observation window is 80mm, and the diameters of the first mounting hole and the second mounting hole are 50 mm; the diameter of the spraying pipeline is 5mm, and the diameter of the cooling pipeline is 20 mm.
Further, the over-charge and discharge safety detection system further comprises a camera electrically connected with the controller.
The embodiment of the invention also provides a method for detecting the overcharge and overdischarge safety of the battery module, which comprises the following steps:
sequentially erecting a cooling pipeline and a spraying pipeline upwards along the bottom of the detection container, laying a heat-conducting soft cushion on the cooling pipeline, and placing a measured object on the heat-conducting soft cushion;
the charging and discharging device is connected through a charging and discharging cable, and the voltage sensor detects the monomer voltage of the measured object;
adjusting the SOC of the tested object to a preassigned value through a charging and discharging device, wherein the SOC is not greater than the rated range of the tested object, and standing for 30 min;
adjusting the charging and discharging equipment to be in a constant voltage CV charging/constant current CC discharging mode to an over-charging/over-discharging specified value, and monitoring the temperature, the monomer voltage and the total pressure parameter of the measured object in real time;
when the cutoff condition is met or the leakage, fire, smoke and explosion of the measured object occur, the output of the charging and discharging cable is stopped through the charging and discharging equipment, and the temperature sensor, the smoke concentration sensor, the flame sensor and the camera continue to keep working states;
the cooling pipeline is communicated and a heat conducting pad is adopted for cooling, and when the cooling efficiency is smaller than a preset value or a tested object is on fire, the spraying pipeline is communicated to use a fire-fighting water source for cooling or extinguishing the fire;
after the temperature of the object to be measured is reduced to room temperature, continuing to introduce cooling water for 15min, stopping introducing the cooling water, and standing for 30 min; if the temperature of the measured object is measured by the temperature sensor to be continuously increased, continuously introducing cooling water for 15min, and standing for 30 min; and continuously and circularly cooling and standing the process until the temperature is stable, and then removing the charging and discharging connection cable.
Further, the overcharge method of the constant voltage CV charge includes:
standing for 0.2h after supplying power to the object to be tested by adopting a constant current with the current of 1C; standing for 0.2h after supplying power to the object to be tested by adopting a constant current with the current of 1/3C; standing for 1h after supplying power to the object to be tested by adopting a constant current with the current of 1/6C; and (5) charging the tested object for 1h by adopting a constant current with the current of 1C, and observing for 0.5.
The system and the method for detecting the overcharge and overdischarge safety of the battery module comprise a detection device, a detection assembly arranged in the detection device and a control assembly electrically connected with the detection assembly; the detection device comprises a detection container, a spraying pipeline and a cooling pipeline which are arranged at the bottom of the detection container, and a smoke pipeline arranged at the top of the detection container; the detection assembly comprises a temperature sensor, a smoke concentration sensor, a flame sensor and a voltage detection sensor; the control assembly comprises a cooling electromagnetic valve, a spraying electromagnetic valve, a smoke electromagnetic valve and a charging and discharging device which are electrically connected with the controller, so that the battery overcharge and overdischarge safety detection process is safer and more efficient, and the safety of detection personnel and the rationality of detection results are guaranteed. The invention solves the problems that a fixed detection device is adopted in the safety test of the existing battery module, the tested object is processed in a mode of infinitely prolonging the standing time, the functions of quick cooling and spraying fire extinguishing are not provided, and the disassembly and the assembly are inconvenient, so that the detection efficiency is low.
Drawings
Fig. 1 is a schematic structural diagram of a detection device in a battery module overcharge and overdischarge safety detection system according to an embodiment of the invention;
FIG. 2 is a front cross-sectional view of FIG. 1;
FIG. 3 is a schematic structural diagram of the cooling pipeline in FIG. 2;
FIG. 4 is a schematic view of the structure of the shower line of FIG. 2;
FIG. 5 is an expanded view of the inspection container of FIG. 1;
FIG. 6 is a block diagram of a detection component in the practice of the present invention;
FIG. 7 is a block diagram of a control assembly in the practice of the present invention;
fig. 8 is a flowchart of a method for detecting overcharge and overdischarge safety of a battery module according to an embodiment of the present invention.
Description of the main element symbols:
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not indicate or imply that the referenced device or element must be in a particular orientation, constructed or operated in a particular manner, and is not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 7, the system for detecting the overcharge and overdischarge safety of a battery module comprises a detection device 10, a detection assembly 20 arranged in the detection device 10, and a control assembly 30 electrically connected to the detection assembly 20.
Further, the detection device 10 comprises a detection container 11, a spraying pipeline 12 and a cooling pipeline 13 which are installed at the bottom of the detection container 11, and a smoke pipeline which is arranged at the top of the detection container 11.
Specifically, the top of detection container 11 is equipped with smog pipeline interface 111, at least one side of detection container 11 is equipped with pin hole or observation window 112, detection container 11 is equipped with the first mounting hole 113 that is used for installing spray pipe 12 near two opposite sides of bottom, detection container 11 is equipped with the second mounting hole 114 that is used for installing cooling pipeline 13 near another two opposite sides of bottom. The diameter of the smoke pipeline joint 111 is 150mm, the diameter of the lead hole or the observation window 112 is 80mm, and the diameters of the first mounting hole 113 and the second mounting hole 114 are 50 mm. It can be understood that the smoke pipe installed in the smoke pipe interface 111 is hermetically connected to the smoke pipe interface 111 through a sealing ring or other sealing structure, the lead wire installed in the lead wire hole is hermetically connected to the lead wire hole through a sealing ring or other sealing structure, the observation window is a transparent structure, the spray pipe 12 is in gap or sealed connection with the first installation hole 113, and the cooling pipe 13 is in gap or sealed connection with the second installation hole 114. In addition, the detection container 11 is a foldable structure, is composed of 5 galvanized steel plates, and is divided into 1 top plate and 4 peripheral steel plates; the external dimensions of each steel plate are consistent, and the steel plates are 500mm in length, 500mm in width and 3mm in thickness; the steel plates are connected through hinges.
Specifically, the spray pipeline 12 includes a square spray pipe 121, and a spray pipe water inlet 122 and a spray pipe blind head 123 respectively disposed at two opposite sides of the spray pipe 121. Wherein, be equipped with a plurality of mouths that spray on shower 121, the department that sprays is equipped with the filter screen. It can be understood that, in the present embodiment, the shape of the spraying pipes 121 is square, and the spraying pipes 121 and the inner wall of the detection container 11 are in a gap structure, and in other embodiments, the shape and the number of the spraying pipes 121 can be adjusted according to actual requirements.
Specifically, the cooling pipeline 13 includes a cooling pipe 131 in a square shape, a cooling pipe water inlet 132 and a cooling pipe water outlet 133 respectively disposed at two opposite sides of the cooling pipe 131, and a cooling pipe blind head 134 disposed at the other opposite side of the cooling pipe 131. Wherein the cooling pipe 131 is composed of communicated hollow steel pipes with the interval of 5 multiplied by 5 mm. The cross-sectional area of the shower tubes 121 is greater than the cross-sectional area of the cooling tubes 131. The diameter of the spraying pipeline 12 is 5mm, and the diameter of the cooling pipeline 13 is 20 mm.
Furthermore, a heat conducting soft pad with a thickness range of 2-5 mm is paved on the surface of the cooling pipeline 13 close to one side of the spray pipe 121, so that the bottom of the tested object is attached to the soft pad as much as possible and is stable when the tested object is placed. In addition, the heat conducting cushion should not shield the spray opening and connect the external water source interface.
Further, the detection component 20 includes a temperature sensor 21, a smoke concentration sensor 22, a flame sensor 23, and a voltage detection sensor 24.
Specifically, the temperature sensor 21, the smoke concentration sensor 22 and the flame sensor 23 are disposed on an inner wall of the detection container 11, and the voltage detection sensor 24 is connected to the battery module to be detected. It will be appreciated that in order to improve the reliability of the sensors in the sensing assembly 20, it is necessary to provide water-proof, fire-proof and corrosion-proof materials around the periphery of the sensors.
Further, the control unit 30 includes a cooling solenoid valve 32, a spraying solenoid valve 33, a smoke solenoid valve 34, and a charging/discharging device 35 electrically connected to the controller 31. The cooling solenoid valve 32, the spraying solenoid valve 33, and the smoke solenoid valve 34 are respectively installed on the cooling duct 13, the spraying duct 12, and the smoke duct. The controller 31 controls the cooling electromagnetic valve 32, the spraying electromagnetic valve 33 and the smoke electromagnetic valve 34 to be opened and closed according to the sensing parameters measured by the temperature sensor 21, the smoke concentration sensor 22 and the flame sensor 23. The controller 31 controls the charging and discharging current, time and on and off of the charging and discharging device 35 according to the voltage parameter measured by the voltage detection sensor 24. Wherein, the controller can adopt an MCU controller or an ARM series controller.
Further, the over-charge and discharge safety detection system further includes a camera electrically connected to the controller 31. The camera sets up in observation window department for the environmental transform that the charge-discharge of the battery module to the inside detection container 11 arouses like fire, smoke, explode and shine and monitor.
The invention provides a system for detecting the overcharge and overdischarge safety of a battery module, which comprises a detection device, a detection assembly and a control assembly, wherein the detection assembly is arranged in the detection device; the detection device comprises a detection container, a spraying pipeline and a cooling pipeline which are arranged at the bottom of the detection container, and a smoke pipeline arranged at the top of the detection container; the detection assembly comprises a temperature sensor, a smoke concentration sensor, a flame sensor and a voltage detection sensor; the control assembly comprises a cooling electromagnetic valve, a spraying electromagnetic valve, a smoke electromagnetic valve and a charging and discharging device which are electrically connected with the controller, so that the battery overcharge and overdischarge safety detection process is safer and more efficient, and the safety of detection personnel and the rationality of detection results are guaranteed. The invention solves the problems that a fixed detection device is adopted in the safety test of the existing battery module, the tested object is processed in a mode of infinitely prolonging the standing time, the functions of quick cooling and spraying fire extinguishing are not provided, and the disassembly and the assembly are inconvenient, so that the detection efficiency is low.
The embodiment of the invention also provides a method for detecting the overcharge and overdischarge safety of the battery module, which is applied to the detection of the overcharge and overdischarge safety of the battery module, and the method comprises the following steps:
sequentially erecting a cooling pipeline and a spraying pipeline upwards along the bottom of the detection container, laying a heat-conducting soft cushion on the cooling pipeline, and placing a measured object on the heat-conducting soft cushion;
the charging and discharging device is connected through a charging and discharging cable, and the voltage sensor detects the monomer voltage of the measured object;
adjusting the SOC of the tested object to a preassigned value through a charging and discharging device, wherein the SOC is not greater than the rated range of the tested object, and standing for 30 min;
adjusting the charging and discharging equipment to be in a constant voltage CV charging/constant current CC discharging mode to an over-charging/over-discharging specified value, and monitoring the temperature, the monomer voltage and the total pressure parameter of the measured object in real time;
when the cutoff condition is met or the leakage, fire, smoke and explosion of the measured object occur, the output of the charging and discharging cable is stopped through the charging and discharging equipment, and the temperature sensor, the smoke concentration sensor, the flame sensor and the camera continue to keep working states;
the cooling pipeline is communicated and a heat conducting pad is adopted for cooling, and when the cooling efficiency is smaller than a preset value or a tested object is on fire, the spraying pipeline is communicated to use a fire-fighting water source for cooling or extinguishing the fire;
after the temperature of the object to be measured is reduced to room temperature, continuing to introduce cooling water for 15min, stopping introducing the cooling water, and standing for 30 min; if the temperature of the measured object is measured by the temperature sensor to be continuously increased, continuously introducing cooling water for 15min, and standing for 30 min; and continuously and circularly cooling and standing the process until the temperature is stable, and then removing the charging and discharging connection cable.
Preferably, the overcharge method of the constant voltage CV charge includes:
standing for 0.2h after supplying power to the object to be tested by adopting a constant current with the current of 1C; standing for 0.2h after supplying power to the object to be tested by adopting a constant current with the current of 1/3C; standing for 1h after supplying power to the object to be tested by adopting a constant current with the current of 1/6C; and (5) charging the tested object for 1h by adopting a constant current with the current of 1C, and observing for 0.5.
Referring to fig. 8, the specific implementation includes the following steps:
firstly, erecting a detection container. Four sides of the five-sided steel plate are firstly surrounded into four side faces of a cube, and then the steel plate is locked by bolts and nuts to be overlapped and folded, so that the detection container of the cube is formed (except for the bottom face). The bottom waterway is installed in the sequence from bottom to top: firstly, erecting a cooling pipeline, then erecting a spraying pipeline, then laying a heat-conducting soft cushion with the thickness of 2-5 mm on the cooling pipeline, and placing the tested object to enable the bottom of the tested object to be attached to the soft cushion as much as possible and to be stable. The heat conducting soft cushion should not shield the spraying opening and connect the external water source interface.
And secondly, connecting a charging and discharging device through a charging and discharging cable, and detecting the monomer voltage of the measured object by a voltage sensor. And locking the upper cover and connecting a smoke pipeline interface on the upper cover with a smoke treatment system through a smoke pipeline.
And thirdly, the SOC of the object to be measured is adjusted to a pre-specified value through the charging and discharging equipment, and the SOC does not exceed the rated range of the object to be measured.
And fourthly, standing for 30 min.
And setting a constant voltage CV charging/constant current CC discharging mode until the specified value of overcharge/overdischarge is reached. And (5) maintaining the process to monitor parameters such as temperature, monomer voltage, total pressure and the like in real time.
TABLE 1 procedure for overcharge operation
And sixthly, when the cutoff condition is met or the leakage, fire, smoke, explosion and the like of the object to be measured occur, the charging and discharging equipment stops working, and the charging and discharging cable stops outputting. The temperature sensor, the smoke concentration sensor, the flame sensor and the camera continue to keep working states. Then, a cooling pipeline is connected, and a heat conducting pad is used for cooling; when the temperature reduction effect is not ideal or the measured object is on fire or other uncontrollable conditions occur, the spraying pipeline can be connected to use a fire-fighting water source for temperature reduction or fire extinguishing.
Seventhly, after the temperature of the object to be measured is reduced to the room temperature, continuing to introduce cooling water for 15min, stopping introducing the cooling water, and standing for 30 min; if the temperature of the measured object is measured by the temperature sensor to be continuously increased, continuously introducing cooling water for 15min, and standing for 30 min; and continuously and circularly cooling and standing the process until the temperature is stable, and then moving the process to equipment to remove the charging and discharging connection cable. The test assembly and sample are then removed.
And (8) finishing the detection.
Ninthly, conducting the next detected article overcharge and overdischarge detection flow, or disassembling the detection container, dismantling the smoke connecting pipe, and enabling the camera and the water channel pipeline to be convenient to store and transfer the detection site. Detecting whether the container is disassembled or not according to subsequent work arrangement; the disassembly process is executed in reverse order with reference to the installation steps.
The invention provides a method for detecting the overcharge and overdischarge safety of a battery module, which comprises the following steps of sequentially erecting a cooling pipeline and a spraying pipeline upwards along the bottom of a detection container, laying a heat-conducting soft cushion on the cooling pipeline, and placing a detected object on the heat-conducting soft cushion; the charging and discharging device is connected through a charging and discharging cable, and the voltage sensor detects the monomer voltage of the measured object; adjusting the SOC of the tested object to a preassigned value through a charging and discharging device, wherein the SOC is not greater than the rated range of the tested object, and standing for 30 min; adjusting the charging and discharging equipment to be in a constant voltage CV charging/constant current CC discharging mode to an over-charging/over-discharging specified value, and monitoring the temperature, the monomer voltage and the total pressure parameter of the measured object in real time; when the cutoff condition is met or the leakage, fire, smoke and explosion of the measured object occur, the output of the charging and discharging cable is stopped through the charging and discharging equipment, and the temperature sensor, the smoke concentration sensor, the flame sensor and the camera continue to keep working states; the cooling pipeline is communicated and a heat conducting pad is adopted for cooling, and when the cooling efficiency is smaller than a preset value or a tested object is on fire, the spraying pipeline is communicated to use a fire-fighting water source for cooling or extinguishing the fire; after the temperature of the object to be measured is reduced to room temperature, continuing to introduce cooling water for 15min, stopping introducing the cooling water, and standing for 30 min; if the temperature of the measured object is measured by the temperature sensor to be continuously increased, continuously introducing cooling water for 15min, and standing for 30 min; the cooling and the standing process are circulated continuously until the temperature is stable, and then the charging and discharging connection cables are detached, so that the battery overcharge and overdischarge safety detection process is safer and more efficient, and the safety of detection personnel and the rationality of detection results are guaranteed. The invention solves the problems that a fixed detection device is adopted in the safety test of the existing battery module, the tested object is processed in a mode of infinitely prolonging the standing time, the functions of quick cooling and spraying fire extinguishing are not provided, and the disassembly and the assembly are inconvenient, so that the detection efficiency is low.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The system for detecting the overcharge and overdischarge safety of the battery module is characterized by comprising a detection device, a detection assembly and a control assembly, wherein the detection assembly is arranged in the detection device; the detection device comprises a detection container, a spraying pipeline and a cooling pipeline which are arranged at the bottom of the detection container, and a smoke pipeline arranged at the top of the detection container; the detection assembly comprises a temperature sensor, a smoke concentration sensor, a flame sensor and a voltage detection sensor; the control assembly comprises a cooling electromagnetic valve, a spraying electromagnetic valve, a smoke electromagnetic valve and a charging and discharging device which are electrically connected with the controller.
2. The battery module overcharge and overdischarge safety detection system according to claim 1, wherein a smoke pipeline connector is arranged at the top of the detection container, at least one side surface of the detection container is provided with a lead hole or an observation window, two opposite side surfaces of the detection container, which are close to the bottom, are provided with first mounting holes for mounting a spray pipeline, and two opposite side surfaces of the detection container, which are close to the bottom, are provided with second mounting holes for mounting a cooling pipeline.
3. The system for detecting the overcharge and overdischarge safety of the battery module according to claim 1, wherein the cooling solenoid valve, the spray solenoid valve and the smoke solenoid valve are respectively installed on the cooling pipeline, the spray pipeline and the smoke pipeline; and a heat-conducting soft cushion with the thickness ranging from 2 mm to 5mm is paved on the surface of one side, close to the spray pipe, of the cooling pipeline.
4. The system according to claim 1, wherein the spray pipe comprises a square spray pipe, a spray pipe water inlet and a spray pipe blind head respectively disposed at two opposite sides of the spray pipe, the spray pipe is provided with a plurality of spray openings, and the spray openings are provided with filter screens.
5. The battery module overcharge and overdischarge safety detection system according to claim 4,
the cooling pipeline comprises a square cooling pipe, a cooling pipe water inlet and a cooling pipe water outlet which are respectively arranged at two opposite sides of the cooling pipe, and a cooling pipe blind head arranged at the other opposite side of the cooling pipe.
6. The battery module overcharge and overdischarge safety detection system of claim 5, wherein the cross-sectional area of the shower pipe is larger than the cross-sectional area of the cooling pipe.
7. The battery module overcharge and overdischarge safety detection system of claim 6, wherein the smoke pipeline interface has a diameter of 150mm, the lead hole or the observation window has a diameter of 80mm, and the first mounting hole and the second mounting hole have a diameter of 50 mm; the diameter of the spraying pipeline is 5mm, and the diameter of the cooling pipeline is 20 mm.
8. The system of claim 2, further comprising a camera electrically connected to the controller.
9. A battery module overcharge and overdischarge safety detection method is characterized by comprising the following steps:
sequentially erecting a cooling pipeline and a spraying pipeline upwards along the bottom of the detection container, laying a heat-conducting soft cushion on the cooling pipeline, and placing a measured object on the heat-conducting soft cushion;
the charging and discharging device is connected through a charging and discharging cable, and the voltage sensor detects the monomer voltage of the measured object;
adjusting the SOC of the tested object to a preassigned value through a charging and discharging device, wherein the SOC is not greater than the rated range of the tested object, and standing for 30 min;
adjusting the charging and discharging equipment to be in a constant voltage CV charging/constant current CC discharging mode to an over-charging/over-discharging specified value, and monitoring the temperature, the monomer voltage and the total pressure parameter of the measured object in real time;
when the cutoff condition is met or the leakage, fire, smoke and explosion of the measured object occur, the output of the charging and discharging cable is stopped through the charging and discharging equipment, and the temperature sensor, the smoke concentration sensor, the flame sensor and the camera continue to keep working states;
the cooling pipeline is communicated and a heat conducting pad is adopted for cooling, and when the cooling efficiency is smaller than a preset value or a tested object is on fire, the spraying pipeline is communicated to use a fire-fighting water source for cooling or extinguishing the fire;
after the temperature of the object to be measured is reduced to room temperature, continuing to introduce cooling water for 15min, stopping introducing the cooling water, and standing for 30 min; if the temperature of the measured object is measured by the temperature sensor to be continuously increased, continuously introducing cooling water for 15min, and standing for 30 min; and continuously and circularly cooling and standing the process until the temperature is stable, and then removing the charging and discharging connection cable.
10. The method for detecting the overcharge and overdischarge safety of a battery module as set forth in claim 9, wherein the overcharge method of the constant-voltage CV charge comprises:
standing for 0.2h after supplying power to the object to be tested by adopting a constant current with the current of 1C; standing for 0.2h after supplying power to the object to be tested by adopting a constant current with the current of 1/3C; standing for 1h after supplying power to the object to be tested by adopting a constant current with the current of 1/6C; and (5) charging the tested object for 1h by adopting a constant current with the current of 1C, and observing for 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557249.4A CN112684357A (en) | 2020-12-24 | 2020-12-24 | Battery module overcharge and overdischarge safety detection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113671392A (en) * | 2021-06-30 | 2021-11-19 | 国联汽车动力电池研究院有限责任公司 | Method for measuring over-charging safety boundary of battery |
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