CN219512045U - Aerosol sensor for cylindrical battery cell - Google Patents

Abstract

The utility model discloses an aerosol sensor for a cylindrical battery cell, which comprises a cylindrical shell, an optical path component for generating photoelectric signals related to aerosol concentration, a circuit component for converting the photoelectric signals generated by the optical path component into aerosol concentration data and a data interface component for outputting the aerosol concentration data, wherein the optical path component and the circuit component are arranged in the cylindrical shell, and the data interface component is arranged on the cylindrical shell. By adopting the aerosol sensor with the structure and installing the aerosol sensor in the battery, the accuracy and the precision of detecting aerosol generated in the battery are improved, the problems that the existing sensor is far away from the battery pack and the monitoring and reaction speed is slower are avoided, meanwhile, the thermal runaway of the battery is effectively monitored as soon as possible, the reliable alarm signal can be provided before the danger occurs, and the occurrence of potential safety hazards such as fire, explosion and casualties caused by the expansion of the thermal runaway is effectively prevented.

Description

Aerosol sensor for cylindrical battery cell

Technical Field

The utility model belongs to the technical field of sensors, and particularly relates to an aerosol sensor for a cylindrical battery cell.

Background

Along with the popularization of new energy automobiles, the application of the battery is more and more extensive, wherein the lithium ion battery has the advantages of high energy density, high output power, capability of rapid charge and discharge, environment friendliness and the like, and gradually becomes the first choice of various applications. In the use process of the battery, due to hidden defects in the early stage manufacturing or improper later stage use and other reasons, the thermal runaway phenomenon of the battery can be caused, when the thermal runaway occurs in the battery, a large amount of heat and gas can be generated in the battery core, and in a sealed battery space, as the heat and the gas are continuously accumulated, the internal pressure is continuously increased, finally the gas breaks through the sealing of a battery shell, and is scattered and erupted, part of substances and gas are mixed to form aerosol, in the prior art, in order to avoid the potential safety hazards caused by factors such as battery burst and the like, the concentration of the aerosol generated by the battery is detected by adopting a sensor to reduce the potential safety hazards caused by factors such as battery burst and the like, but the method is still one of the subjects of developing personnel at present because the monitoring unit in the sensor is far away from the battery pack, the monitoring and the reaction speed is slow, and the detection accuracy and the detection efficiency are poor.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide an aerosol sensor for a cylindrical battery cell, which solves the problems of poor detection accuracy and poor detection efficiency of the existing aerosol sensor.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows: the utility model provides an aerosol sensor for cylinder electricity core, includes cylindrical casing, is used for producing the light path subassembly of the photoelectric signal that is correlated with aerosol concentration, is used for with the photoelectric signal that light path subassembly produced changes into aerosol concentration data's circuit subassembly and is used for exporting aerosol concentration data's data interface subassembly, light path subassembly and circuit subassembly set up the inside of cylindrical casing, data interface subassembly sets up on the cylindrical casing.

Preferably, the light path component includes a transmitting unit and a receiving unit, the transmitting unit emits a light signal with a fixed intensity, the light signal irradiates an aerosol entering the aerosol sensor, scattered light is generated on the aerosol, the scattered light intensity is related to the concentration of the aerosol, the scattered light irradiates the receiving unit again, and the receiving unit converts the scattered light into an electric signal.

Preferably, the transmitting unit comprises a light emitting tube, a transmitting end lens and a transmitting end light shielding plate, wherein a transmitting light hole is formed in the transmitting end light shielding plate, the light emitting tube and the transmitting end lens are arranged in the transmitting end light shielding plate, the transmitting end lens is close to the transmitting light hole, and the light emitting tube is located on one side, far away from the transmitting light hole, of the transmitting end lens.

Preferably, the receiving unit comprises a photoelectric receiving tube, a receiving end lens and a receiving end light shielding plate, wherein a receiving light hole is formed in the receiving end light shielding plate, the photoelectric receiving tube and the receiving end lens are arranged in the receiving end light shielding plate, the receiving end lens is close to the receiving light hole, and the photoelectric receiving tube is located on one side, far away from the receiving light hole, of the receiving end lens.

Preferably, the optical path assembly further includes a first partition plate and a second partition plate, both of which are located between the transmitting unit and the receiving unit, and a detection area is formed between the first partition plate and the second partition plate.

Preferably, the circuit assembly comprises a circuit board, a communication interface chip, a control unit and an amplifying unit, wherein the communication interface chip, the control unit and the amplifying unit are all arranged on the circuit board.

Preferably, the circuit assembly further comprises a voltage converter.

Preferably, a vent assembly is provided on the cylindrical housing.

Preferably, the ventilation assembly comprises a first ventilation hole and a second ventilation hole, a third ventilation hole is further formed in the circuit board, the first ventilation hole and the second ventilation hole are respectively and oppositely arranged on the side wall of the cylindrical shell, and the first ventilation hole, the third ventilation hole and the second ventilation hole form an airflow channel for enabling aerosol to flow into the aerosol sensor.

Preferably, the circuit board is located at the central position inside the cylindrical shell and is fixedly connected with the cylindrical shell, and the luminous tube and the photoelectric receiving tube are both fixedly arranged on the circuit board.

Preferably, the transmitting end light shielding plate, the receiving end light shielding plate, the first partition plate and the second partition plate are fixedly connected with the cylindrical shell; the transmitting end lens and the receiving end lens are fixedly connected with the cylindrical shell through clamping grooves.

Compared with the prior art, the aerosol sensor with the structure is arranged in the battery, and in the using process, the light path component emits a light signal with fixed intensity and irradiates the aerosol in the aerosol sensor to generate scattered light, and the scattered light is converted into an electric signal through the light path component, wherein the intensity of the electric signal is in proportion to the concentration of the aerosol; the circuit component converts the electric signal into aerosol concentration data, the aerosol concentration data is output through the data interface component, so that the accuracy and the precision of detecting the aerosol generated in the battery are improved, the problems that the existing sensor is far away from the battery pack and the monitoring and reaction speed are slow are avoided, meanwhile, the thermal runaway of the battery is effectively monitored as early as possible, reliable alarm signals can be provided before danger occurs, the early-stage and middle-stage data of the thermal runaway are required to be acquired in real time quickly and accurately by means of various sensors, and the early-warning purpose is achieved as early as possible, and therefore the occurrence of potential safety hazards such as fire, explosion and casualties and the like caused by the expansion of the thermal runaway is effectively prevented, and the market competitiveness of the aerosol sensor is improved.

In addition, the aerosol sensor with the structure is simple in structure, strong in product market competitiveness and worthy of being widely popularized and used.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a schematic perspective view of an aerosol sensor for a cylindrical battery cell according to an embodiment of the present utility model;

fig. 2 is an exploded view of an aerosol sensor for a cylindrical battery cell according to an embodiment of the present utility model;

fig. 3 is a partial cross-sectional view of an aerosol sensor for a cylindrical battery cell according to an embodiment of the present utility model;

fig. 4 is a partial cross-sectional view of an aerosol sensor for a cylindrical cell according to an embodiment of the present utility model under another view angle.

In the drawings, 1, a cylindrical housing, 11, a ventilation assembly, 111, a first ventilation hole, 112, a second ventilation hole, 2, an optical path assembly, 21, a transmitting unit, 211, an optical tube, 212, a transmitting end lens, 213, a transmitting end light shielding plate, 22, a receiving unit, 221, an optical receiving tube, 222, a receiving end lens, 223, a receiving end light shielding plate, 23, a first partition plate, 24, a second partition plate, 3, a circuit assembly, 31, a circuit board, 311, a third ventilation hole, 32, a communication interface chip, 33, a control unit, 34, an amplifying unit, 35, a voltage converter, and 4, a data interface assembly.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be clearly understood that terms such as "vertical", "horizontal", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present utility model, and do not mean that the apparatus or element referred to must have a specific orientation or position, and thus should not be construed as limiting the present utility model. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The aerosol sensor for the cylindrical battery cell provided by the embodiment of the utility model comprises a cylindrical shell 1, an optical path component 2 for generating an optical-electrical signal related to aerosol concentration, a circuit component 3 for converting the optical-electrical signal generated by the optical path component 2 into aerosol concentration data, and a data interface component 4 for outputting the aerosol concentration data, wherein the optical path component 2 and the circuit component 3 are arranged in the cylindrical shell 1, and the data interface component 4 is arranged on the cylindrical shell 1, as shown in fig. 1-4.

After the scheme is adopted, the aerosol sensor with the structure is arranged in a battery, and in the using process, the light path component 2 emits a light signal with fixed intensity and irradiates the aerosol in the aerosol sensor to generate scattered light, and the scattered light is converted into an electric signal through the light path component 2, wherein the intensity of the electric signal is in proportion to the concentration of the aerosol; the circuit component 3 converts the electric signal into aerosol concentration data, the aerosol concentration data is output through the data interface component 4, so that the accuracy and the precision of detecting the aerosol generated in the battery are improved, the problems that the existing sensor is far away from the battery pack and the monitoring and reaction speed are slow are avoided, meanwhile, the thermal runaway of the battery is effectively monitored as early as possible, reliable alarm signals can be provided before danger occurs, initial and middle-stage data of the thermal runaway need to be acquired in a rapid, accurate and real-time mode by means of various sensors, and the early warning is realized, and therefore the occurrence of potential safety hazards such as fire, explosion and casualties are effectively prevented.

In an implementation process, as shown in fig. 3, the optical path component 2 includes a transmitting unit 21 and a receiving unit 22, and the transmitting unit 2 emits an optical signal with a fixed intensity.

The light signal irradiates the aerosol entering the inside of the aerosol sensor, scattered light is generated on the aerosol, the scattered light intensity is related to the aerosol concentration, the scattered light is irradiated on the receiving unit 22 again, and the receiving unit 22 converts the scattered light into an electric signal.

In the specific implementation process, as shown in fig. 3, the optical path assembly further includes a first partition plate 23 and a second partition plate 24, where the first partition plate 23 and the second partition plate 24 are located between the transmitting unit 21 and the receiving unit 22, and a detection area is formed between the first partition plate 23 and the second partition plate 24.

In a specific implementation process, as shown in fig. 3, the emitting unit 21 includes an emitting tube 211, an emitting end lens 212, and an emitting end light shielding plate 213, an emitting light hole 2131 is provided on the emitting end light shielding plate 213, the emitting tube 211 and the emitting end lens 212 are both disposed inside the emitting end light shielding plate 213, and the emitting end lens 212 is disposed near the emitting light hole 2131, and the emitting tube 211 is located at a side of the emitting end lens 212 far from the emitting light hole 2131; the receiving unit 22 includes a photoelectric receiving tube 221, a receiving lens 222, and a receiving mask 223, where the receiving mask 223 is provided with a receiving light hole 2231, the photoelectric receiving tube 221 and the receiving lens 222 are both disposed inside the receiving mask 223, and the receiving lens 222 is disposed near the receiving light hole 2231, and the photoelectric receiving tube 221 is located at a side of the receiving lens 222 far from the receiving light hole 2231.

When the aerosol sensor works, light rays emitted by the luminous tube 211 are emitted forward according to a certain cone angle, wherein the light rays of a main light area reach the emission end lens 212, are converged by the emission end lens 212 and then reach the detection area through the emission light holes 2131 on the emission end light shielding plate 213, other stray light rays are shielded by the emission end light shielding plate 213 and can not pass through the open holes, the light rays reaching the detection area irradiate the aerosol to generate scattered light, and the intensity of the scattered light and the concentration of the aerosol form a corresponding proportional relation; part of the scattered light passes through the receiving light transmitting hole 2231 on the receiving-end lens 222, reaches the receiving-end lens 222, is converged by the receiving-end lens 222, and then irradiates the photoelectric receiving tube 221, and the photoelectric receiving tube 221 converts the scattered light signal into an electric signal with corresponding intensity.

In the specific implementation process, as shown in fig. 4, the circuit assembly 3 includes a circuit board 31, a communication interface chip 32, a control unit 33, and an amplifying unit 34, where the communication interface chip 32, the control unit 33, and the amplifying unit 34 are all disposed on the circuit board 31.

In operation of the aerosol sensor, the amplifying unit 34 amplifies the electrical signal generated by the photoelectric receiving tube 221, the control unit 33 collects the electrical signal in real time and converts the electrical signal into a digital signal, a built-in algorithm is executed to calculate aerosol concentration data, and the communication interface chip 32 converts the communication signal into a level and electrical characteristics required for communication, such as a LIN transceiver chip and a CAN transceiver chip.

In a specific implementation, as shown in fig. 4, the circuit assembly 3 further includes a voltage converter 35 that provides the required current and voltage for each chip in the aerosol sensor.

As shown in fig. 4, which is a partial cross-sectional view of the aerosol sensor, the arrangement of the front surface of the PCB circuit board 31 is shown, the communication interface chip 32, the control unit 33, the amplifying unit 34 and the voltage converter 35 are all disposed on the circuit board 31, wherein the voltage converter 35 converts the power input from the outside into the current and voltage required by each chip and circuit module of the circuit assembly 3, the electric signal output by the photoelectric receiving tube 221 is connected to the input end of the amplifying unit (amplifier) 34, amplified to the required amplitude by the amplifying unit 34 and then transmitted to the control unit MCU33, the control unit MCU33 samples the electric signal and converts the electric signal into a digital signal, performs the built-in algorithm to calculate the aerosol concentration data, and determines whether the alarm concentration point is reached, the communication interface chip 32 converts the communication signal of the control unit MCU33 into the level signal of the required electrical characteristics so as to perform the effective data transmission with the host system.

The detection data of the aerosol sensor is transmitted to the host computer through the data interface component (connector) 31, and the host computer system executes subsequent man-machine interaction operation after receiving the data, displays the data or gives out audible and visual alarm, etc. While the entire aerosol sensor is powered through the data interface assembly (connector) 31.

In the specific implementation process, the cylindrical shell 1 is provided with a ventilation assembly 11; through setting up on cylindrical casing 1, the aerosol that the battery inside produced of being convenient for gets into in the aerosol sensor through ventilation assembly 11 rapidly to accomplish the detection to aerosol concentration as early as possible, thereby improved the detection precision and the detection efficiency of whole sensor.

In a specific implementation process, the ventilation assembly 11 includes a first ventilation hole 111 and a second ventilation hole 112, the circuit board 31 is further provided with a third ventilation hole 311, the first ventilation hole 111 and the second ventilation hole 112 are respectively and oppositely disposed on the side wall of the cylindrical housing 1, and the first ventilation hole 111, the third ventilation hole 311 and the second ventilation hole 112 form an airflow channel for the aerosol to flow into the aerosol sensor.

Through set up first air vent 111 and second air vent 112 respectively in the both sides that cylindrical casing 1 is relative, set up third air vent 311 on circuit board 31, make first air vent 111, third air vent 311 and second air vent 112 constitute the air flue structure of sensor like this, outside aerosol passes through air flue structure diffusion or circulate and reaches the inside detection zone of sensor to further improved the detection precision and the detection efficiency of this aerosol sensor.

In the specific implementation process, as shown in fig. 3 and 4, the circuit board 31 is located at a central position inside the cylindrical housing 1 and is fixedly connected with the cylindrical housing 1, and the light emitting tube 211 and the photoelectric receiving tube 221 are both fixedly arranged on the circuit board 31.

In the specific implementation process, the transmitting-end shielding plate 213, the receiving-end shielding plate 223, the first partition plate 23 and the second partition plate 24 are respectively connected to the circuit board 31 and/or the cylindrical housing 1.

The transmitting end light shielding plate 213, the receiving end light shielding plate 223, the first partition plate 23 and the second partition plate 24 may be connected to the circuit board 31, or may be connected to the inner wall of the cylindrical housing 1, the transmitting end lens 212 and the receiving end lens 222 are fixedly connected to the cylindrical housing 1 through a clamping groove, and in addition, the transmitting end light shielding plate 213, the receiving end light shielding plate 223, the first partition plate 23 and the second partition plate 24 may be connected to the circuit board 31 and the cylindrical housing 1 respectively, and in this embodiment, are preferably connected to the inner wall of the cylindrical housing 1, as shown in fig. 2.

In addition, in the implementation process, the shape of the cylindrical shell 1 is preferably cylindrical, and the positions of the first ventilation holes 111 and the second ventilation holes 112 arranged on the cylindrical shell 1 can be at the side surface of the cylindrical shell, or can be at two circular end surfaces, the number and the shape of the ventilation holes are not limited, and the number is at least 1; the third vent 311 is optional.

A plurality of optional light shielding plates with light holes can be arranged between the luminous tube 211 and the emission end lens 212 of the light path component 2; a plurality of optional light shielding plates with light holes can be arranged between the photoelectric receiving tube 221 and the receiving end lens 222 of the light path component 2; the emission end lens 212 of the optical path component 2 is an optional component; the amplifying unit (amplifier) 34 of the circuit assembly 3 may be integrated inside the control unit (MCU) 33, thereby omitting an external amplifier chip.

The communication interface chip 32 of the circuit assembly 3 is determined according to a specific communication protocol, and some communications do not need to be equipped with an interface chip, such as PWM, UART, I C.

The data interface assembly (connector) 4, including but not limited to a vehicle connector, generally comprises three or more pins, a positive power source, a negative power source, an optional alarm signal line, and a plurality of data communication and control pins. The aerosol sensor communication protocol is not unique, and can be compatible with mainstream communication protocols such as CAN, LIN, RS485, PWM, UART, I C and the like.

The aerosol sensor is applied to detecting thermal runaway of the lithium battery; when the battery is in thermal runaway, substances in the battery core are dissipated and erupted to form high-concentration aerosol, the aerosol reaches a detection area in the sensor through an air passage structure, so that the scattered light intensity of the detection area is increased, correspondingly, an electric signal converted by a photoelectric receiving tube for receiving the scattered light is also enhanced, a concentration value calculated by a circuit component by sampling the electric signal is increased, and an alarm signal is sent to the BMS when the concentration value exceeds a preset concentration threshold value; and the thermal runaway of the battery is effectively monitored in time.

In summary, by adopting the aerosol sensor with the structure and installing the aerosol sensor in the battery, in the using process, the optical path component emits an optical signal with fixed intensity and irradiates the aerosol in the aerosol sensor to generate scattered light, and the scattered light is converted into an electric signal through the optical path component, wherein the intensity of the electric signal is in proportion to the concentration of the aerosol; the circuit component converts the electric signal into aerosol concentration data, the aerosol concentration data is output through the data interface component, so that the accuracy and the precision of detecting the aerosol generated in the battery are improved, the problems that the existing sensor is far away from the battery pack and the monitoring and reaction speed are slow are avoided, meanwhile, the thermal runaway of the battery is effectively monitored as early as possible, reliable alarm signals can be provided before danger occurs, the early-stage and middle-stage data of the thermal runaway are required to be acquired in real time quickly and accurately by means of various sensors, and the early-warning purpose is achieved as early as possible, and therefore the occurrence of potential safety hazards such as fire, explosion and casualties and the like caused by the expansion of the thermal runaway is effectively prevented, and the market competitiveness of the aerosol sensor is improved.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (11)

1. The aerosol sensor for the cylindrical battery cell is characterized by comprising a cylindrical shell (1), an optical path component (2) for generating an optical signal related to aerosol concentration, a circuit component (3) for converting the optical signal into aerosol concentration data and a data interface component (4) for outputting the aerosol concentration data, wherein the optical path component (2) and the circuit component (3) are arranged inside the cylindrical shell (1), and the data interface component (4) is arranged on the cylindrical shell (1).

2. An aerosol sensor for a cylindrical electrical cell according to claim 1, wherein the light path assembly (2) comprises a transmitting unit (21) and a receiving unit (22), the transmitting unit (21) emits a light signal of a fixed intensity, the light signal irradiates an aerosol entering the interior of the aerosol sensor, scattered light is generated on the aerosol, the scattered light is re-irradiated on the receiving unit (22), and the receiving unit (22) converts the scattered light into an electrical signal.

3. The aerosol sensor for a cylindrical battery cell according to claim 2, wherein the emitting unit (21) comprises a light emitting tube (211), an emitting end lens (212) and an emitting end light shielding plate (213), an emitting light transmitting hole (2131) is formed in the emitting end light shielding plate (213), the light emitting tube (211) and the emitting end lens (212) are both arranged in the emitting end light shielding plate (213), the emitting end lens (212) is arranged close to the emitting light transmitting hole (2131), and the light emitting tube (211) is located on one side, far away from the emitting light transmitting hole (2131), of the emitting end lens (212).

4. An aerosol sensor for a cylindrical electrical core according to claim 3, wherein the receiving unit (22) comprises a photoelectric receiving tube (221), a receiving end lens (222) and a receiving end light shielding plate (223), the receiving end light shielding plate (223) is provided with a receiving light transmitting hole (2231), the photoelectric receiving tube (221) and the receiving end lens (222) are both arranged inside the receiving end light shielding plate (223), the receiving end lens (222) is arranged close to the receiving light transmitting hole (2231), and the photoelectric receiving tube (221) is located on one side of the receiving end lens (222) far away from the receiving light transmitting hole (2231).

5. The aerosol sensor for a cylindrical battery cell according to claim 4, wherein the optical path assembly (2) further comprises a first partition plate (23) and a second partition plate (24), the first partition plate (23) and the second partition plate (24) are both located between the transmitting unit (21) and the receiving unit (22), and a detection area is formed between the first partition plate (23) and the second partition plate (24).

6. The aerosol sensor for a cylindrical battery cell according to claim 5, wherein the circuit assembly (3) comprises a circuit board (31), a communication interface chip (32), a control unit (33) and an amplifying unit (34), and the communication interface chip (32), the control unit (33) and the amplifying unit (34) are all arranged on the circuit board (31).

7. An aerosol sensor for a cylindrical cell according to claim 6, characterized in that the circuit assembly (3) further comprises a voltage converter (35).

8. Aerosol sensor for cylindrical cells according to claim 7, characterized in that the cylindrical housing (1) is provided with a venting assembly (11).

9. The aerosol sensor for a cylindrical battery cell according to claim 8, wherein the ventilation assembly (11) comprises a first ventilation hole (111) and a second ventilation hole (112), a third ventilation hole (311) is further formed in the circuit board (31), the first ventilation hole (111) and the second ventilation hole (112) are respectively and oppositely formed on the side wall of the cylindrical housing (1), and the first ventilation hole (111), the third ventilation hole (311) and the second ventilation hole (112) form an airflow channel for the aerosol to flow into the aerosol sensor.

10. The aerosol sensor for a cylindrical battery cell according to claim 9, wherein the circuit board (31) is located at a central position inside the cylindrical housing (1) and is fixedly connected with the cylindrical housing (1), and the light emitting tube (211) and the photoelectric receiving tube (221) are both fixedly arranged on the circuit board (31).

11. The aerosol sensor for a cylindrical battery cell according to claim 10, wherein the transmitting end light shielding plate (213), the receiving end light shielding plate (223), the first partition plate (23) and the second partition plate (24) are fixedly connected with the cylindrical housing (1); the transmitting end lens (212) and the receiving end lens (222) are fixedly connected with the cylindrical shell (1) through clamping grooves.