Safety fire-fighting module suitable for battery management system

Abstract

The utility model discloses a safety fire-fighting module suitable for a battery management system, which can be installed in an independent battery pack so as to carry out independent gas and temperature detection on each battery pack, a detection cavity is arranged in an upper shell through a partition plate, and the partition plate is provided with a gas sensor positioning hole and an environment temperature sensor positioning hole. The hydrogen sensor, the carbon monoxide sensor and the smoke and organic matter sensor are semiconductor sensors and penetrate through the gas sensor positioning hole of the partition plate, the environment temperature sensor is a semiconductor sensor and penetrates through the temperature sensor positioning hole of the partition plate, and a first ventilation hole is formed in the front side face of the upper shell and located in the detection cavity. The cover plate is provided with a plurality of second ventilation holes, the detection cavity is completely independent from the interior of the upper shell, and the situation that devices such as a circuit board in the upper shell are burnt out due to fire in the battery pack is avoided, so that the reliability of the safety fire-fighting module is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery management system technical field, concretely is a kind of safety fire module suitable for battery management system. BACKGROUND

[0002] At present, under the background of energy crisis and new energy development, battery and battery management system have become the focus of attention. As a kind of new energy equipment power source, battery can greatly reduce the pollutant gas emission when using equipment, so it is widely used. At the same time, if battery is physically impacted by external during use, or internal thermal runaway due to overcharge, overheating, short circuit, it is easy to produce fire, explosion and other fire accidents. Therefore, safe management and monitoring of battery also become an important part of battery system.

[0003] Traditional fire management system is independent of battery management system, and monitors the safety of the whole battery box. This design cannot detect the specific parameters such as environmental gas concentration and environmental temperature inside each battery pack, and in actual use, it may cause greater loss because of untimely fire alarm or inability to quickly determine which position of battery pack is abnormal. And the detection sensor of existing safety fire module is directly exposed in battery pack, or is a semiconductor sensor and is directly welded with circuit board, and the shell is directly provided with holes for temperature or gas concentration detection. When battery pack catches fire, flame is easy to directly penetrate the shell and contact circuit board or device, which causes rapid damage after fire and affects detection effect. Therefore, an improved technology is needed to solve the problem existing in the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of safety fire module suitable for battery management system, can be installed in independent battery pack, to carry out individual gas and temperature detection to each battery pack, and detection cavity is provided in the inside of upper shell by partition, partition is provided with gas sensor positioning hole and environmental temperature sensor positioning hole, hydrogen sensor, carbon monoxide sensor, smoke and organic matter sensor are all semiconductor sensors and are arranged in the gas sensor positioning hole of partition, environmental temperature sensor is semiconductor sensor and is arranged in the temperature sensor positioning hole of partition, first vent hole is provided in the side of upper shell and located at detection cavity, cover plate is provided with a plurality of second vent holes, detection cavity and the inside of upper shell are completely independent, and circuit board and other devices in the inside of upper shell will not be burned out due to fire in battery pack, so as to greatly improve the reliability of safety fire module, to solve the problem proposed in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: A kind of safety fire-fighting module suitable for battery management system, including upper shell, bottom plate, baffle, gas detection module, temperature detection module and communication module, the bottom plate is installed in the upper shell bottom by bolt, the upper surface of the bottom plate is provided with several internal thread columns, the internal thread column is installed with circuit board by bolt, the inside one side of the upper shell is provided with baffle, the inside of the upper shell is provided with detection cavity by baffle, the baffle is provided with several gas sensor positioning holes and temperature sensor positioning hole, recess is uniformly provided in the lower surface of the baffle and located at gas sensor positioning hole and temperature sensor positioning hole, the recess of gas sensor positioning hole and temperature sensor positioning hole is provided with sealing ring, the upper surface of the upper shell and located at detection cavity is provided with through slot, the upper shell is provided with cover in through slot, the upper shell side positive side and located at detection cavity is provided with first air hole, the cover is provided with several second air holes;

[0006] The gas detection module includes a hydrogen sensor, a carbon monoxide sensor, a smoke and organic matter sensor, the hydrogen sensor, the carbon monoxide sensor, the smoke and organic matter sensor are all semiconductor gas sensors, the pins of the hydrogen sensor, the carbon monoxide sensor, the smoke and organic matter sensor are welded with the corresponding positions of the circuit board, and the hydrogen sensor, the carbon monoxide sensor, the smoke and organic matter sensor are all arranged in the corresponding gas sensor positioning holes of the baffle and matched with the corresponding sealing rings.

[0007] The temperature detection module includes an environmental temperature sensor, the environmental temperature sensor is a semiconductor environmental temperature sensor, the pin of the environmental temperature sensor is welded with the corresponding position of the circuit board, and the environmental temperature sensor is arranged in the temperature sensor positioning hole of the baffle and matched with the corresponding sealing ring.

[0008] The communication module includes a CAN communication module and an alarm signal module, and the CAN communication module and the alarm signal module are connected with the circuit board respectively.

[0009] Preferably, the utility model provides a kind of safety fire-fighting module suitable for battery management system, wherein, the upper shell both sides are provided with bending fixed plate.

[0010] Preferably, the utility model provides a kind of safety fire-fighting module suitable for battery management system, wherein, the lower part of the inside of the upper shell is provided with first boss, the lower surface of the first boss is provided with several screw holes, the bottom plate is provided with several counterbores, and the counterbores of the bottom plate and the screw holes of the first boss are one-to-one corresponding and connected by screw cooperation.

[0011] Preferably, the utility model provides a kind of safety fire-fighting module suitable for battery management system, wherein the inner wall of the upper part of the upper shell at detection cavity and baffle upper part is provided with second boss, the upper surface of the second boss is equipped with several screw holes, the cover plate is equipped with several counterbores, the counterbores of the cover plate and the screw holes of the second boss are one-to-one corresponding and are connected by screw cooperation.

[0012] Preferably, the utility model provides a kind of safety fire-fighting module suitable for battery management system, wherein the circuit board is further connected with power module and battery temperature sensor.

[0013] Compared with prior art, the utility model has the beneficial effects that:

[0014] (1) can be installed in independent battery pack, to detect each battery pack separately, by hydrogen sensor, carbon monoxide sensor, smoke and organic sensor for detecting hydrogen, carbon monoxide, methane and other gases produced when burning in battery pack and accompanied by a large amount of smoke and organic gas, environmental temperature sensor is used to detect the change of temperature inside battery pack, then through the cooperation of communication module, alarm can be made quickly after battery pack burns and explodes, reduce personnel casualties and property losses, improve safety.

[0015] (2) the inside of upper shell is provided with detection cavity by baffle, baffle is equipped with gas sensor positioning hole and environmental temperature sensor positioning hole, hydrogen sensor, carbon monoxide sensor, smoke and organic sensor all adopt semiconductor sensor and are arranged in the gas sensor positioning hole of baffle, and are sealed by sealing ring simultaneously, environmental temperature sensor adopts semiconductor sensor and is arranged in the temperature sensor positioning hole of baffle, and is sealed by sealing ring simultaneously, first vent is arranged in the side of upper shell and located at detection cavity, cover plate is equipped with several second vents, detection cavity and the inside of upper shell are completely independent, and the circuit board and other devices in the inside of upper shell will not be burned out due to fire inside battery pack, to greatly improve the reliability of safety fire-fighting module. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is cross-sectional structure schematic view of the utility model;

[0017] Figure 2 It is front view structure schematic view of the utility model;

[0018] Figure 3 It is rear view structure schematic view of the utility model;

[0019] Figure 4 It is top view structure schematic view of the utility model;

[0020] Figure 5The top view structure (not showing the cover plate) of the utility model is shown in the figure.

[0021] Figure 6 The circuit principle diagram of the utility model is shown in the figure.

[0022] Figure 7 The circuit principle diagram of the hydrogen sensor (the circuit principle of the carbon monoxide sensor and the smoke and organic matter sensor is similar to that of the hydrogen sensor) is shown in the figure.

[0023] Figure 8 The circuit principle diagram of the alarm signal module is shown in the figure.

[0024] In the figure: upper shell 1, bottom plate 2, partition plate 3, inner threaded column 4, circuit board 5, detection cavity 6, gas sensor positioning hole 7, temperature sensor positioning hole 8, sealing ring 9, cover plate 10, first ventilation hole 11, second ventilation hole 12, hydrogen sensor 13, carbon monoxide sensor 14, smoke and organic matter sensor 15, environmental temperature sensor 16, CAN communication module 17, alarm signal module 18, bending fixing plate 19, first boss 20, second boss 21, power module 22, battery temperature sensor 23. DETAILED DESCRIPTION

[0025] The technical solutions of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] It should be noted that in the description of the utility model, it should be noted that the terms "inner", "outer", "upper", "lower", "two sides", "one end", "the other end", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0027] Please refer to Figures 1-6This utility model provides a technical solution: a safety and fire protection module suitable for a battery management system, including an upper shell 1, a bottom plate 2, a partition plate 3, a gas detection module, a temperature detection module, and a communication module. The bottom plate 2 is bolted to the bottom of the upper shell 1. A first boss 20 is provided on the lower inner edge of the upper shell 1. Several screw holes are formed on the lower surface of the first boss 20. Several countersunk holes are formed on the bottom plate 2. The countersunk holes in the bottom plate 2 correspond one-to-one with the screw holes in the first boss 20 and are connected by screws. The first boss 20 is used to... The base plate 2 and the upper housing 1 are connected and disassembled. The upper surface of the base plate 2 has several internally threaded posts 4, and circuit boards 5 are mounted on the internally threaded posts 4 via bolts. A partition 3 is provided on one side of the interior of the upper housing 1, and a detection chamber 6 is provided inside the upper housing 1 via the partition 3. The partition 3 has several gas sensor positioning holes 7 and temperature sensor positioning holes 8. Grooves are provided on the lower surface of the partition 3 at the gas sensor positioning holes 7 and temperature sensor positioning holes 8, and sealing elements are provided at the grooves of the gas sensor positioning holes 7 and temperature sensor positioning holes 8. A through groove is formed on the upper surface of the upper housing 1 at the detection cavity 6. A cover plate 10 is provided on the upper housing 1 at the through groove. Second bosses 21 are provided on the upper part of the upper housing 1 at the detection cavity 6 and on the inner wall of the upper part of the partition 3. Several screw holes are formed on the upper surface of the second bosses 21, and several countersunk holes are formed on the cover plate 10. The countersunk holes of the cover plate 10 correspond one-to-one with the screw holes of the second bosses 21 and are connected by screws. The second bosses 21 are used to realize the installation and removal of the cover plate 10, and the removable cover plate 10 facilitates the inspection of the detection cavity 6. The detection ends of the hydrogen sensor 13, carbon monoxide sensor 14, and smoke and organic matter sensor 15 are cleaned. A first ventilation hole 11 is opened on the front side of the upper housing 1 and located at the detection chamber 6. Several second ventilation holes 12 are opened on the cover plate 10. Bending fixing plates 19 are provided on both sides of the upper housing 1 to realize the installation and fixing of the safety and fire protection module. The circuit board 5 is also connected to the power module 22 and the battery temperature sensor 23. The power module 22 is powered by a 24V DC power supply, and the battery temperature sensor 23 is used for the temperature detection of the battery cell.

[0028] The gas detection module includes a hydrogen sensor 13, a carbon monoxide sensor 14, and a smoke and organic matter sensor 15. All three sensors are semiconductor gas sensors. The pins of the hydrogen sensor 13, carbon monoxide sensor 14, and smoke and organic matter sensor 15 are soldered to the corresponding positions on the circuit board 5. The hydrogen sensor 13, carbon monoxide sensor 14, and smoke and organic matter sensor 15 are all inserted through the corresponding gas sensor positioning holes 7 in the partition 3 and cooperate with the corresponding sealing rings 9.

[0029] The temperature detection module comprises an ambient temperature sensor 16, which is a semiconductor ambient temperature sensor 16, the pins of which are welded to the corresponding positions of the circuit board 5, and the ambient temperature sensor 16 is arranged in the temperature sensor positioning hole 8 of the partition plate 3 and cooperates with the corresponding sealing ring 9.

[0030] The communication module comprises a CAN communication module 17 and an alarm signal module 18, which are connected to the circuit board 5 respectively.

[0031] The assembly method and the principle of use are as follows: first, the upper shell 1 with the partition plate 3 is prepared, the upper surface of the upper shell 1 at the detection cavity 6 is open and provided with a cover plate 10, and the upper shell 1, the partition plate 3, the bottom plate 2 and the cover plate 10 are made of Q235 steel. During assembly, the circuit board 5 provided with the hydrogen sensor 13, the carbon monoxide sensor 14, the smoke and organic matter sensor 15 and the ambient temperature sensor 16 is fastened and connected to the inner threaded column 4 of the bottom plate 2 through screws, then the bottom plate 2 is connected to the upper shell 1, and in the process, the hydrogen sensor 13, the carbon monoxide sensor 14, the smoke and organic matter sensor 15 and the ambient temperature sensor 16 are arranged through the corresponding gas sensor positioning hole 7 and the temperature sensor positioning hole 8 of the partition plate 3, at this time, the contact ends of the hydrogen sensor 13, the carbon monoxide sensor 14, the smoke and organic matter sensor 15 are located in the detection cavity 6, and the assembly is completed. If the gas sensor detects that the corresponding gas concentration in the battery pack reaches the threshold value, or the temperature module detects that the battery and ambient temperature value exceeds the set value, the safety fire-fighting module will upload the situation to the battery cluster management module through CAN communication and dry contact alarm signal, then the cluster management module will start the fire extinguisher and other fire-fighting measures according to the obtained alarm signal, and remind the user on the display module.

[0032] The gas detection module includes a hydrogen sensor 13, a carbon monoxide sensor 14, and a smoke and organic matter sensor 15. The three gas sensors all belong to semiconductor gas sensors, which have high sensitivity, fast response, low cost, and are easy to integrate. Since the internal semiconductor has the characteristic of changing resistance when it contacts the corresponding measuring gas, the corresponding circuit design can convert this resistance change characteristic into an output signal corresponding to the gas concentration, that is, the composition and concentration value of the gas in the air can be calculated. The specific measurement principle is that when the gas sensor is stable and works in a normal air environment, the internal resistance value of the sensor is the reference resistance value. If there is a gas to be measured corresponding to the sensor in the air, the resistance of the internal semiconductor material will change. Therefore, the concentration of the measured gas can be calculated according to the ratio of the real-time internal resistance value of the sensor to the reference resistance value in different environments. In the specific circuit design, in order to facilitate measurement and calculation, the changed resistance value is converted into a voltage value, and then the concentration value of the environmental gas is obtained through the analog-to-digital converter of the main chip and the corresponding conversion formula.

[0033] The specific circuit design is shown in Figure 7 In the figure, U15 is the hydrogen sensor 13, which is mainly divided into a heating circuit and a loop circuit. The heating circuit uses 1.8V direct current to power the chip. The loop circuit uses 1.8V direct current to provide a voltage value after a load resistor with a proper resistance value is connected in series, and the voltage value of the load resistor can be used to calculate the resistance value of the sensor semiconductor and the concentration value of the environmental gas. Finally, in order to reduce the error, an operational amplifier is used to amplify the voltage value on the load resistor by a factor of two before measurement and calculation. The principle and circuit diagram of the carbon monoxide sensor 14 and the smoke and organic matter sensor are similar. Through the three different gas sensors and their circuit designs, hydrogen and carbon monoxide gases in the concentration range of 0ppm-2000ppm, and smoke and organic matter in the concentration range of 0ppm-10000ppm can be detected.

[0034] The temperature detection module includes an environmental temperature sensor 16 and a battery temperature sensor 23 for environmental temperature detection and battery temperature detection. The principle is to calculate the temperature value by using the characteristic that the resistance value of NTC resistor changes at different temperatures. In the specific circuit design, a load resistor and an NTC resistor are connected in series using 5V direct current, and a shunt resistor is connected in parallel to the NTC resistor. Finally, the voltage value across the NTC resistor is calculated using the analog-to-digital converter of the main chip, so as to calculate the temperature value near the sensing end of the NTC resistor. After the above circuit design, the temperature detection module can detect temperature values in the range of -40℃ to 125℃, with an error of within 1℃.

[0035] The communication module includes a CAN communication module 17 and an alarm signal module 18. The CAN communication module primarily connects to the battery cluster management module, uploading data such as battery temperature, ambient temperature, and ambient gas concentration obtained from the safety module's main chip, while also receiving unified control from the battery cluster management module. If the gas detection module or temperature detection module detects abnormal data, the CAN communication module 17 can transmit an alarm message. The alarm signal module 18... Figure 8 As shown, the alarm signal module 18 is specifically a dry contact control signal output, connected to the input detection terminal of the battery pack management module via wiring. Under normal operating conditions inside the battery pack, the two signals output by the alarm signal module 18 are in an open-circuit state. When abnormal conditions such as thermal runaway or combustion occur inside the battery pack, the main chip of the safety module controls the output signal ERROR-OUT to a high level based on data transmitted from the gas sensor and temperature sensor modules. At this time, the coil of the signal relay is immediately energized, making the two signals output by the alarm signal module 18 conductive, and the battery pack management input terminal can receive the alarm signal from the safety and fire suppression module. Finally, after the battery pack management module receives the CAN alarm message and alarm signal, it will activate fire extinguishers and other devices through the controller to extinguish the fire and prevent explosion inside the battery pack.

[0036] This utility model has a reasonable structure and can be installed in an independent battery pack, allowing for individual detection of each battery pack. Hydrogen sensor 13, carbon monoxide sensor 14, and smoke and organic matter sensor 15 are used to detect hydrogen, carbon monoxide, methane, and other gases produced during combustion within the battery pack, along with a large amount of smoke and organic matter. An ambient temperature sensor 16 detects changes in the internal temperature of the battery pack. With the assistance of a communication module, it can quickly issue an alarm in the event of battery pack combustion or explosion, reducing personal injury and property damage and improving safety. Furthermore, the upper housing 1 has a detection chamber 6 inside via a partition 3, and the partition 3 has gas sensor positioning holes 7 and temperature sensor positioning holes 7. The hydrogen sensor 13, carbon monoxide sensor 14, and smoke and organic matter sensor 15 are all semiconductor sensors and are installed through the gas sensor positioning hole 7 of the partition 3, and are sealed by the sealing ring 9. The ambient temperature sensor 16 is a semiconductor sensor and is installed through the temperature sensor positioning hole of the partition 3, and is also sealed by the sealing ring 9. A first ventilation hole 11 is opened on the front side of the upper housing 1 and located at the detection chamber 6. Several second ventilation holes 12 are opened on the cover plate 10. The detection chamber 6 is completely independent of the interior of the upper housing 1, so that the circuit board 5 and other components inside the upper housing 1 will not be burned due to a fire inside the battery pack, thereby greatly improving the reliability of the safety and fire protection module.

[0037] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0038] Finally to be explained is that: the above specific embodiments are merely used to illustrate the technical solutions of the utility model and not to limit, although the utility model is described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified and equivalent replaced without departing from the spirit and scope of the technical solutions of the utility model, which should be covered in the scope of the claims of the utility model.

Claims

1. A safety fire module suitable for use in a battery management system, characterized by: Including upper shell (1), bottom plate (2), partition (3), gas detection module, temperature detection module and communication module, the bottom of the upper shell (1) is provided with the bottom plate (2) by bolt installation, the upper surface of the bottom plate (2) is provided with a plurality of internal thread column (4), the internal thread column (4) is provided with circuit board (5) by bolt installation, one side of the inside of the upper shell (1) is provided with partition (3), the inside of the upper shell (1) is provided with detection cavity (6) by partition (3), the partition (3) is provided with a plurality of gas sensor positioning hole (7) and temperature sensor positioning hole (8), the lower surface of the partition (3) and located at the gas sensor positioning hole (7) and temperature sensor positioning hole (8) are all provided with recess, the recess of the gas sensor positioning hole (7) and temperature sensor positioning hole (8) is provided with sealing ring (9), the upper surface of the upper shell (1) and located at the detection cavity (6) is provided with through slot, the upper shell (1) is provided with cover plate (10) at the through slot, the upper shell (1) side positive side and located at the detection cavity (6) is provided with first vent hole (11), the cover plate (10) is provided with a plurality of second vent hole (12); The gas detection module includes hydrogen sensor (13), carbon monoxide sensor (14), smoke and organic matter sensor (15), the hydrogen sensor (13), carbon monoxide sensor (14), smoke and organic matter sensor (15) are all semiconductor gas sensors, the pins of the hydrogen sensor (13), carbon monoxide sensor (14), smoke and organic matter sensor (15) are welded with the corresponding positions of the circuit board (5), the hydrogen sensor (13), carbon monoxide sensor (14), smoke and organic matter sensor (15) are all provided in the corresponding gas sensor positioning hole (7) of the partition (3) and cooperate with the corresponding sealing ring (9); The temperature detection module includes environmental temperature sensor (16), the environmental temperature sensor (16) is a semiconductor environmental temperature sensor (16), the pins of the environmental temperature sensor (16) are welded with the corresponding positions of the circuit board (5), the environmental temperature sensor (16) is provided in the temperature sensor positioning hole (8) of the partition (3) and cooperates with the corresponding sealing ring (9); The communication module includes CAN communication module (17) and alarm signal module (18), the CAN communication module (17) and alarm signal module (18) are connected with the circuit board (5) respectively.

2. A safety fire module for battery management system as claimed in claim 1, wherein: The upper shell (1) is provided with bending fixed plate (19) on both sides.

3. A safety fire module for battery management system as claimed in claim 1, wherein: The lower part of the inside of the upper shell (1) is provided with first boss (20), the lower surface of the first boss (20) is provided with a plurality of screw holes, the bottom plate (2) is provided with a plurality of counterbores, the counterbores of the bottom plate (2) correspond with the screw holes of the first boss (20) one by one and are connected by screw cooperation.

4. A safety fire module for battery management system as claimed in claim 1, wherein: The inner wall of the upper part of the detection cavity (6) and the upper part of the partition plate (3) of the upper shell (1) are provided with second bosses (21), the upper surface of the second bosses (21) is provided with a plurality of screw holes, the cover plate (10) is provided with a plurality of counterbores, the counterbores of the cover plate (10) correspond to the screw holes of the second bosses (21) one by one and are connected through screw cooperation.

5. A safety fire module for battery management system as claimed in claim 1, wherein: The circuit board (5) is further connected with a power module (22) and a battery temperature sensor (23).

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