Combined optical monitoring and early warning device for energy storage battery cluster

Abstract

The utility model provides a combined optical monitoring and early warning device for an energy storage battery cluster, and relates to the technical field of energy storage battery early warning devices. A light emitting cavity, a first reflecting cavity, a second reflecting cavity and a light sensing cavity are arranged on two sides in the detection chamber, and a laser emitter is arranged in the light emitting cavity; a first reflective mirror is arranged in the first reflection cavity, a second reflective mirror is arranged in the second reflection cavity, and a light sensing chip is arranged in the light sensing cavity and connected with the detection circuit board. The early warning device has the beneficial effects that when in use, the early warning device is arranged in the box body of the energy storage battery cluster, gas in the box body of the energy storage battery cluster can enter the detection chamber, the laser transmitter can transmit detection laser to the gas in the detection chamber, the detection laser is received by the light sensing chip after passing through the first reflective mirror and the second reflective mirror, and the gas in the box body of the energy storage battery cluster is detected. The photosensitive chip can analyze and detect the laser spectrum so as to obtain the concentration information of various gases in the detection chamber, and then early warning is performed before the energy storage battery cluster fires.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage battery early warning device technical field, specifically is a kind of combined optical monitoring early warning device for energy storage battery cluster. BACKGROUND

[0002] Under the background of the vigorous development of energy storage technology, the energy density requirements and safety requirements of energy storage power station are gradually improved. Among them, the small space energy storage cabin type energy storage battery cluster battery thermal runaway hidden trouble has become the focus of attention of the present stage energy storage power station operation safety.

[0003] The process of energy storage battery thermal runaway is essentially a violent side reaction of electrolyte in energy storage battery, which is a gradual process. Energy storage battery will emit gas at the initial stage of thermal runaway, and the gas usually includes carbon monoxide, hydrogen and electrolyte leakage gas VOC. Therefore, a monitoring and early warning device is usually provided in the energy storage battery cluster box, and its purpose is to monitor the concentration of sensitive gas (i.e. carbon monoxide, hydrogen and electrolyte leakage gas VOC) in the energy storage battery cluster box in real time. There are many ways to monitor and early warning device, among which the gas detection technology based on tunable diode laser absorption spectrum (TDLAS) is widely used, but the existing TDLAS monitoring and early warning device has a long path for the detection beam to pass through the gas to be detected, so its size is usually large, the manufacturing cost is high, and the detection result is easily affected by the dust and solid impurities in the energy storage battery cluster box. It is difficult to adapt to the development trend of small space energy storage cabin type energy storage battery cluster, so a small size and high precision monitoring and early warning device for energy storage battery cluster is needed. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a kind of combined optical monitoring early warning device for energy storage battery cluster, including shell body and bottom plate;

[0005] Detection chamber and installation room are equipped in the shell body;The shell body is provided with air-permeable sealing membrane and the bottom plate respectively above and below,

[0006] Air-permeable sealing membrane is located above the detection chamber;The detection chamber is provided with light emitting cavity, first reflecting cavity, second reflecting cavity and photosensing cavity on both sides, wherein the light emitting cavity and the second reflecting cavity are located on the same side, and the first reflecting cavity and the photosensing cavity are located on the same side;Laser emitter is arranged in the light emitting cavity;First reflector is arranged in the first reflecting cavity, and second reflector is arranged in the second reflecting cavity;Photosensitive chip is arranged in the photosensing cavity;The laser emitter is used to emit detection laser to the first reflector, the first reflector and the second reflector are used to reflect the detection laser, and the photosensitive chip is used to receive the detection laser and analyze the detection laser spectrum to obtain the gas concentration information in the detection chamber;

[0007] The detection circuit board is connected with the laser emitter and the photosensitive chip.

[0008] Further, the light emitting cavity and the light sensing cavity are respectively provided with a first mounting hole and a second mounting hole, and a collimating lens and a condensing lens are respectively mounted in the first mounting hole and the second mounting hole.

[0009] Further, the first mirror and the second mirror are respectively provided with an electric heating element on the back surface.

[0010] Further, the protective cover is embedded with a protective net in the middle part.

[0011] Further, the collimating lens, the first mirror, the second mirror and the condensing lens respectively seal the light emitting cavity, the first reflecting cavity, the second reflecting cavity and the light sensing cavity.

[0012] Further, the outer shell is provided with a partition plate, and the partition plate separates the detection chamber and the mounting chamber.

[0013] Further, the electric heating element is a heating resistor, and the heating resistor is connected with the detection circuit board.

[0014] Further, the alarm is connected with the detection circuit board.

[0015] Further, the alarm and the detection circuit board are fixed on the bottom plate.

[0016] Further, the detection circuit board is further provided with a connecting pin, and the connecting pin penetrates the bottom plate.

[0017] The combination type optical monitoring and early warning device for the energy storage battery cluster has the following beneficial effects:

[0018] (1) The device has a detection chamber and an installation chamber inside its outer casing. Inside the detection chamber, on both sides, are a light emitting cavity, a first reflecting cavity, a second reflecting cavity, and a light sensing cavity, wherein the light emitting cavity and the second reflecting cavity are located on the same side, and the first reflecting cavity and the light sensing cavity are located on the same side. A laser emitter is installed inside the light emitting cavity. A first reflector is installed inside the first reflecting cavity, and a second reflector is installed inside the second reflecting cavity. A photosensitive chip is installed inside the photosensitive cavity, and the photosensitive chip is connected to the detection circuit board. When in use, the early warning device is installed inside the energy storage battery cluster box. Gas inside the battery cluster box can enter the detection chamber. The laser emitter can emit a detection laser into the gas inside the detection chamber. After passing through the first and second reflectors, the detection laser is received by the photosensitive chip. The photosensitive chip can analyze the spectrum of the detection laser to obtain information on the concentration of various gases inside the detection chamber, thus providing an early warning before a fire occurs in the energy storage battery.

[0019] (2) The detection laser emitted by the laser emitter of the device is refracted twice by the first reflector and the second reflector before reaching the photosensitive chip. This can extend the path length of the detection laser when the detection chamber is small, so that the detection laser can pass through the gas in the detection chamber multiple times, thereby improving the detection accuracy of various gas concentrations in the detection chamber and thus improving the sensitivity of fire early warning of energy storage battery clusters.

[0020] (3) The device is equipped with a breathable sealing membrane above the detection chamber. The breathable sealing membrane can block solid impurities such as dust in the battery cluster box from entering the detection chamber, ensuring that solid impurities will not affect the detection accuracy of the gases in the detection chamber. Attached Figure Description

[0021] Fig. 1 This is a top view of a combined optical monitoring and early warning device for energy storage battery clusters according to an embodiment of this utility model.

[0022] Fig. 2 This is a cross-sectional view of the upper housing of a combined optical monitoring and early warning device for energy storage battery clusters according to an embodiment of this utility model.

[0023] Fig. 3 This is a top view of the detection chamber of a combined optical monitoring and early warning device for energy storage battery clusters according to an embodiment of this utility model.

[0024] In the above figure: 1-outer shell, 11-partition plate, 2-protective cover, 21-protective net, 3-base plate, 4-laser emitter, 41-collimating lens, 5-photosensitive chip, 51-condensing lens, 6-first reflector, 61-second reflector, 62-heating resistor, 7-detection circuit board, 71-alarm, 8-breathable sealing membrane. Detailed Implementation

[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model embodiment will be further described below in combination with the drawings.

[0026] Reference Figs. 1 to 3 The utility model discloses a kind of combined optical monitoring early warning devices for energy storage battery cluster, which is arranged in energy storage battery cluster box when in use.The monitoring early warning device includes shell body 1, bottom plate 3 and protective cover 2.

[0027] Detection chamber and installation chamber are equipped in the shell body 1;Specifically, the shell body 1 is the rectangular box body of upper and lower ends opening, the shell body 1 is equipped with partition plate 11, and the detection chamber and the installation chamber are separated by the partition plate 11.The shell body 1 is equipped with breathable sealing membrane 8 and the bottom plate 3 respectively above and below,

[0028] Breathable sealing membrane 8 is located above the detection chamber;Breathable sealing membrane 8 and partition plate close detection chamber from top and bottom, wherein breathable sealing membrane 8 can make gas in energy storage battery cluster box into detection chamber and can block dust and other solid impurities.

[0029] Light emitting cavity, first reflecting cavity, second reflecting cavity and light sensing cavity are equipped on both sides in the detection chamber, wherein light emitting cavity and second reflecting cavity are located on the same side, and first reflecting cavity and light sensing cavity are located on the same side;Laser emitter 4 is equipped in the light emitting cavity;First reflector 6 is equipped in the first reflecting cavity, second reflector 61 is equipped in the second reflecting cavity, and photosensitive chip 5 is equipped in the light sensing cavity;Detection circuit board 7 is equipped in the installation chamber, and the detection circuit board 7 is connected with the laser emitter 4 and photosensitive chip 5.

[0030] When in use, the monitoring early warning device emits detection laser to first reflector 6 by laser emitter 4, and first reflector 6 and second reflector 61 can reflect detection laser, and photosensitive chip 5 is used to receive detection laser and analyze detection laser spectrum to obtain various gas concentration information in detection chamber, and send various gas concentration information detected to detection circuit board 7, and detection circuit board 7 can monitor concentration information of sensitive gas (sensitive gas usually includes carbon monoxide, hydrogen and electrolyte leakage gas VOC) in various gas concentration information obtained, and send early warning information when the concentration of sensitive gas reaches or exceeds predetermined value.The device gives early warning before energy storage battery fire.

[0031] And the first mirror 6 and the second mirror 61 in the device can constitute a combined mirror structure, so that the detection laser emitted by the laser emitter 4 is refracted twice by the first mirror 6 and the second mirror 61 before reaching the photosensitive chip 5, so that the path length of the detection laser can be extended in the case of small detection chamber size, so that the detection laser can pass through the gas in the detection chamber multiple times, thereby improving the detection accuracy of the concentration of various gases in the detection chamber, thereby improving the sensitivity of the energy storage battery cluster fire warning.

[0032] In a preferred embodiment, a first mounting hole and a second mounting hole are respectively arranged in the light emitting cavity and the light sensing cavity, and a collimating lens 41 and a condensing lens 51 are respectively arranged in the first mounting hole and the second mounting hole. The collimating lens 41 is used to convert the light emitted by the laser emitter 4 into a parallel light beam, and the condensing lens 51 is used to converge the parallel light beam received thereby on the photosensitive chip 5, so as to ensure that the photosensitive chip 5 can receive sufficient light intensity, thereby improving the detection accuracy of the sensitive gas.

[0033] In a preferred embodiment, an electric heating element is arranged on the back surface of each of the first mirror 6 and the second mirror 61, and the electric heating element is a heating resistor 62. The heating resistor 62 is connected to the detection circuit board 7, and is used to heat the first mirror 6 and the second mirror 61, so as to increase the mirror surface temperature of the first mirror 6 and the second mirror 61, and prevent water in the air in the detection chamber from being adsorbed on the mirror surface of the first mirror 6 and the second mirror 61.

[0034] In a preferred embodiment, the device further comprises a protective cover 2, which is arranged on the outer housing 1 and is located above the air-permeable sealing film 8. A protective net 21 is embedded in the middle of the protective cover 2, and the protective net 21 can prevent the air-permeable sealing film from being damaged.

[0035] In a preferred embodiment, the collimating lens 41, the first mirror 6, the second mirror 61, and the condensing lens 51 respectively seal the light emitting cavity, the first reflection cavity, the second reflection cavity, and the light sensing cavity, so as to prevent the laser emitter 4, the photosensitive chip 5, the first mirror 6, and the second mirror 61 from being eroded by the sensitive gas, thereby prolonging the service life of the device.

[0036] In the preferred embodiment, the device further comprises an alarm 71, which is a buzzer, arranged in the installation chamber, connected with the detection circuit board 7. The alarm 71 and the detection circuit board 7 are both fixed on the bottom plate 3. The buzzer is used to issue a buzzer warning sound under the control of the detection circuit board 7. The detection circuit board 7 is further provided with a connecting pin, which passes through the bottom plate 3. The connecting pin can make the device conveniently connected with an external monitoring center or secondarily integrated.

[0037] In this article, the orientation words such as front, back, upper, lower, etc. are defined according to the positions of the parts in the drawings and the positions of the parts relative to each other, only for the purpose of expressing the technical solution clearly and conveniently. It should be understood that the use of the orientation words should not limit the scope of the application claimed.

[0038] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.

[0039] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A combined optical monitoring and early warning device for energy storage battery clusters, characterized by: The outer shell and the bottom plate are included. The detection chamber and the mounting chamber are arranged in the outer shell. The gas-permeable sealing film is arranged above the detection chamber. The light emitting cavity, the first reflecting cavity, the second reflecting cavity and the light sensing cavity are arranged on both sides of the detection chamber.

2. The combined optical monitoring and warning device for energy storage battery cluster according to claim 1, characterized in that: The laser emitter is arranged in the light emitting cavity.

3. The combined optical monitoring and warning device for energy storage battery cluster according to claim 1, characterized in that: The first reflecting mirror is arranged in the first reflecting cavity.

4. The combined optical monitoring and warning device for energy storage battery cluster according to claim 1, characterized in that: The second reflecting mirror is arranged in the second reflecting cavity.

5. The combined optical monitoring and warning device for energy storage battery cluster according to claim 2, characterized in that: The light sensing chip is arranged in the light sensing cavity.

6. The combined optical monitoring and warning device for energy storage battery cluster according to claim 2, characterized in that: The detection circuit board is arranged in the mounting chamber.

7. The combined optical monitoring and warning device for energy storage battery cluster according to claim 3, characterized in that: The detection circuit board is connected with the laser emitter and the light sensing chip.

8. A combined optical monitoring and warning device for energy storage battery clusters according to claim 3, characterized in that: The first mounting hole and the second mounting hole are arranged in the light emitting cavity and the light sensing cavity respectively.

9. A combined optical monitoring and warning device for energy storage battery clusters according to claim 8, characterized in that: The collimating lens and the condensing lens are arranged in the first mounting hole and the second mounting hole respectively.

10. The combined optical monitoring and warning device for energy storage battery cluster according to claim 9, characterized in that: The electric heating element is arranged on the back of the first reflecting mirror and the second reflecting mirror. The protective cover is arranged on the outer shell and above the gas-permeable sealing film. The protective net is embedded in the middle of the protective cover. The collimating lens, the first reflecting mirror, the second reflecting mirror and the condensing lens seal the light emitting cavity, the first reflecting cavity, the second reflecting cavity and the light sensing cavity respectively. The partition plate is arranged in the outer shell. The partition plate separates the detection chamber and the mounting chamber. The heating resistor is connected with the detection circuit board. The alarm is arranged in the mounting chamber. The alarm is connected with the detection circuit board. The detection circuit board and the alarm are fixed on the bottom plate. The connecting pin is arranged on the detection circuit board and penetrates the bottom plate.

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