CN113991199A

CN113991199A - Container type energy storage power station

Info

Publication number: CN113991199A
Application number: CN202111231607.7A
Authority: CN
Inventors: 陈创庭; 李明飞; 孙婉妹; 饶睦敏; 刘国军; 姚家伟; 尧瑶
Original assignee: Guangdong Energy Group Science And Technology Research Institute Co ltd
Current assignee: Guangdong Energy Group Science And Technology Research Institute Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-01-28

Abstract

The invention relates to the field of fire prevention of energy storage power stations, and discloses a container type energy storage power station, which comprises: the battery cluster, first detector and second detector all locate the box in, and the battery cluster is located on the box diapire to set up first detector at the box roof, set up the second detector in battery cluster inside, wherein first detector includes H2 sensor, and the second detector includes CO sensor and VOC sensor. The invention has the beneficial effects that: set up the first detector including H2 sensor at the box top, because H2 concentration is high, the diffusion is fast, can guarantee the promptness of early warning in the big space to at the inside second detector that includes CO sensor and VOC sensor that sets up of battery cluster, the early warning is rapid and the cost is lower in the little space.

Description

Container type energy storage power station

Technical Field

The invention relates to the field of fire prevention of energy storage power stations, in particular to a container type energy storage power station.

Background

At present, China has serious peak and low peak phenomena of power utilization, partial electric quantity generated by a power grid during the low peak of the power utilization is stored through electrochemical energy storage, and the partial electric quantity is released during the high peak of the power utilization, which is a common mode for solving the problem of the power utilization, wherein a container type energy storage power station is one of the most common energy storage modes.

However, since the lithium ion battery may have safety hazards such as liquid leakage and thermal runaway, it is necessary to install a plurality of gas detectors in the container to prevent fire. The gas detectors commonly used at present are an H2 sensor, a CO sensor and a VOC sensor, and the response speed of the H2 sensor is faster than that of the other two sensors, so the sensor installation mode in the prior art is usually to install at least one H2 sensor on each battery cluster to improve the response speed and the detection accuracy. However, the H2 sensor is expensive compared to the other two sensors, resulting in higher overall cost of the container type energy storage power station, and therefore the cost needs to be cut down by reasonable sensor arrangement.

Disclosure of Invention

The utility model aims at providing a container formula energy storage power station, it improves fault early warning's speed and accuracy through reasonable sensor arrangement form to reduce cost.

The purpose of the application is realized by the following technical scheme:

a container-type energy storage power station comprising: the battery pack comprises a box body, a battery pack, a first detector and a second detector, wherein the battery pack, the first detector and the second detector are all arranged in the box body;

the first detector includes an H2 sensor and the second detector includes a CO sensor and a VOC sensor.

In some embodiments of the present application, the battery pack comprises at least two battery clusters and at least two first detectors, wherein at least two battery clusters and at least two first detectors are arranged in a row.

In some embodiments of the present application, at least two rows of the battery clusters are included, and at least one row of the first detector is disposed between two adjacent rows of the battery clusters.

In some embodiments of the present application, at least one row of the first detectors is disposed at an intermediate position between two adjacent rows of the battery clusters.

In some embodiments of the present application, the maximum range of the H2 sensor is 28000-30000 ppm, and the maximum range of the CO sensor is 2600-3000 ppm.

In some embodiments of the present application, the second detector is mounted at a middle position of a top end of the cell cluster.

In some embodiments of the present application, in the first detectors in the same row, a distance between two adjacent first detectors is 1-4 meters.

In some embodiments of the present application, in the first detectors in the same row, the distance between two adjacent first detectors is 2-3 meters.

In some embodiments of the application, the air conditioner system is further included, the air conditioner system is arranged inside the box body, and a third detector is arranged at an air inlet of the air conditioner system;

the third detector includes an H2 sensor, a CO sensor, and a VOC sensor.

Compared with the prior art, the container type energy storage power station has the advantages that: the utility model provides a container formula energy storage power station sets up the first detector including H2 sensor at the top of box, because H2 concentration is high, and the diffusion is fast, can guarantee the promptness of early warning in the big space to at the inside second detector that includes CO sensor and VOC sensor that sets up of battery cluster, early warning is rapidly and the cost is lower in the little space.

Drawings

Fig. 1 is a perspective view of a container type energy storage power station of the present solution;

FIG. 2 is a front view of the container-type energy storage power station of the present solution;

FIG. 3 is a layout diagram of a composite detector in a prefabricated cabin according to the scheme;

FIG. 4 is a layout diagram of a composite detector in the vertical direction in a prefabricated cabin according to the scheme;

FIG. 5 is a layout diagram of a horizontal composite detector in a prefabricated cabin according to the scheme;

FIG. 6 is a hydrogen variation curve of the top of the prefabricated cabin in the scheme;

FIG. 7 is a hydrogen variation curve of the center of the prefabricated cabin in the vertical direction according to the scheme;

fig. 8 is a change curve of hydrogen, CO and VOC in the composite detector No. b of the present scheme.

In the figure, 1, a box body; 2. a battery cluster; 3. a first detector; 4. a second detector; 5. a third detector; 6. an air conditioning system; 7. prefabricating a cabin; 8. a composite detector.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present application, it should be understood that the terms "inner", "top", "bottom", "upper", and the like used herein to indicate an orientation or positional relationship based on that shown in the drawings are merely for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, an embodiment of the present application provides a container type energy storage power station, including: the detector comprises a box body 1, a battery cluster 2, a first detector 3 and a second detector 4, wherein the battery cluster 2, the first detector 3 and the second detector 4 are all arranged in the box body 1, the battery cluster 2 is arranged on the bottom wall of the box body 1, the first detector 3 is arranged on the top wall of the box body 1 and is positioned above the battery cluster 2, and the second detector 4 is arranged in each battery cluster 2;

the first detector 3 comprises an H2 sensor and the second detector 4 comprises a CO sensor and a VOC sensor.

Based on the technical scheme, firstly, the gas diffusion rule of the battery cluster 2 during thermal runaway needs to be determined through tests. As shown in fig. 3-5, since the purpose of this test is to explore the diffusion pattern of the thermal runaway gas in space, the prefabricated cabin 7 used can be smaller than a standard 40-foot container to reduce the amount of gas detectors. The size of the prefabricated cabin 7 selected by the scheme is 2870mm multiplied by 2750mm multiplied by 2500mm, and the gas detectors are arranged on the top of the prefabricated cabin 7 and the plane of the middle position of the prefabricated cabin 7. The gas detector adopts a composite detector 8, the composite detector 8 comprises an H2 sensor, a CO sensor and a VOC sensor, and the three sensors are arranged on the same circuit board and are respectively used for measuring the H2 gas concentration, the CO gas concentration and the VOC gas concentration. H2, CO and volatile organic compounds are the most common gases when the lithium ion battery is in thermal runaway, wherein the volatile organic compounds comprise C2H4, CH4, C2H6, C3H6 and the like, and the occurrence of the thermal runaway can be accurately and rapidly detected through the corresponding H2 sensor, CO sensor and VOC sensor, so that the alarm is given in time.

With continued reference to fig. 3-5, the composite probe 8 is arranged in the form of: the method comprises the following steps that 9 composite detectors 8 are arranged at the top of a prefabricated cabin 7 at equal intervals, the 9 composite detectors 8 are arranged in a lattice form, the distance between every two adjacent composite detectors 8 is 900mm, and the composite detector 8 b in the center of the lattice is located in the center of the top surface of the prefabricated cabin 7; in addition, the middle position of the width direction of the prefabricated cabin 7 is also provided with 9 composite detectors 8, the 9 composite detectors 8 are arranged below the middle position of the top of the prefabricated cabin 7 at intervals, namely below the composite detectors 8 of the numbers a, b and c, and the distance between two adjacent composite detectors 8 in the vertical direction is 700 mm. And finishing the arrangement of the composite type detector 8 in the whole prefabricated cabin 7.

The lithium ion battery is arranged at the bottom of the prefabricated cabin 7 and located in the middle of the composite detectors 8B and N, the lithium ion battery is subjected to thermal runaway in an overcharging mode, then the gas concentration is monitored through the composite detectors 8 arranged in the prefabricated cabin 7, and the gas diffusion rule is further analyzed and obtained.

The results of the tests show in figures 6-8, the law of diffusion of the gas in the capsule 7 is determined by comparing the sequence of the response times of the composite probe 8. Fig. 6 shows the variation of the H2 sensor in the composite detector 8 on the roof of the prefabricated cabin, from which it can be seen that the response times have the sequence n > m > o > b > c > r > a > p > q. Then, the response speeds of the H2 sensors in the composite probe 8 in the vertical direction are compared, and as shown in fig. 7, it can be seen that the response times thereof are in the order of b > c > a > f > e > l > H > i > d > g ═ k > j. In the vertical direction, even if the thermal runaway location is at the bottom of the pod 7, the composite probe 8, which is still at the top, responds first. Finally, the response time sequence of the H2, the CO and the VOC sensors in the composite detector 8B positioned at the top is compared, as shown in FIG. 8, the fastest response speed of the H2 sensor, the second fastest response speed of the VOC sensor and the slowest response speed of the CO sensor can be obviously seen.

In summary, the thermal runaway characteristic gas diffusion rule of the lithium ion battery in the prefabricated cabin 7 can be obtained as follows: when the lithium ion battery is in thermal runaway, the detector at the top of the thermal runaway position responds first, and then gas diffuses from top to bottom along the top of the prefabricated cabin 7 to the periphery with the thermal runaway position as a central point until the whole space is filled. And the sensor at the same position, the H2 sensor has the fastest response speed, the VOC sensor is next to the fastest, and the CO sensor is the slowest.

Determining the arrangement mode of the gas detectors according to the conclusion, firstly, as the detector at the top of the thermal runaway position firstly responds, in order to ensure the early warning speed, a first detector 3 with high response speed is required to be arranged at the top of the box body 1; then, because the thermal runaway occurs in the battery cluster 2, a detector needs to be arranged in the battery cluster 2 for monitoring, although the first detector 3 has a high response speed, the cost is relatively high, compared with the whole box 1, the space in the battery cluster 2 is much smaller, and the second detector 4 can also respond quickly in a smaller space range, so that the cost is saved by installing one second detector 4 in each battery cluster 2, and the early warning speed cannot be influenced.

In some embodiments of the present application, as shown in fig. 1 and 2, the detection device comprises at least two battery clusters 2 and at least two first detectors 3, at least two battery clusters 2 and at least two first detectors 3 are all arranged, and the battery clusters 2 and the first detectors 3 are arranged to more conveniently detect leaked gas, and a smaller amount of first detectors 3 are used, so that the effect of comprehensive detection can be achieved.

Further, as shown by continuously referring to fig. 1 and 2, the battery pack comprises at least two rows of the battery clusters 2, at least one row of the first detector 3 is arranged between two adjacent rows of the battery clusters 2, and the arrangement of the first detector 3 between two rows of the battery clusters 2 can also save the usage amount of the first detector 3 and save the cost under the condition of ensuring the early warning speed.

Further, as shown in fig. 1, at least one row of the first detectors is disposed at the middle position between two adjacent rows of the battery clusters, and since the diffusion rule of the thermal runaway leakage gas is that the thermal runaway leakage gas rapidly reaches the top and diffuses around, the first detectors 3 are disposed at the middle position between two adjacent rows of the battery clusters 2, and the battery clusters 2 on both sides can be considered, so that the response time is not prolonged due to the distance from the thermal runaway position.

In some embodiments of the application, the maximum range of the H2 sensor is 28000-30000 ppm, the maximum range of the CO sensor is 2600-3000 ppm, and the minimum ranges of the H2 sensor and the CO sensor are both 0, the maximum value of the H2 concentration measured according to the test is 27831ppm, and the maximum value of the CO concentration is 2557ppm, so that it is required to ensure that the maximum range of the sensor is greater than the gas concentration, and waste caused by the overlarge maximum range is avoided. In addition, the VOC sensor is used for measuring the concentration of volatile organic compounds, the measuring range of the VOC sensor can be adjusted according to actual conditions, and the maximum measuring range of the VOC sensor in the scheme is 1000ppm, namely the measuring range of the VOC sensor is 0-1000 ppm.

In some embodiments of the present application, as shown in fig. 1, the second detector 4 is installed at a top middle position of the battery cluster 2, and the leaked gas moves toward an upper portion of the battery cluster 2 when thermal runaway occurs inside the battery cluster 2, so that the second detector 4 is disposed at the top middle position to respond faster and does not interfere with the layout inside the battery cluster 2.

It should be noted that, a plurality of second detectors 4 may also be installed in the battery cluster 2, for example, one second detector 4 may be installed at each of the upper and lower eight corners of the battery cluster 2, and the installation is to consider the battery arrangement mode in the actual battery cluster 2, so that when a certain battery is thermally out of control, the gas may not directly go upward, but only moves in the gap between the battery and the battery cabinet, and the installation in the corner is more favorable for the fast response of the detector.

In some embodiments of this application, with one row in the first detector, adjacent two distance between the first detector is 1 ~ 4 meters, generally speaking, 40 chi containers of standard are adopted to container formula energy storage power station's box, and the size of 40 chi containers of standard is 12032mm x 2352mm x 2393mm, and the quantity that can obtain first detector is 3 ~ 12, and structural layout and detector quantity are comparatively reasonable.

Further, in the same row in the first detector, adjacent two distance between the first detector is 2 ~ 3 meters, and the quantity of first detector is 4 ~ 6 promptly, practices thrift the cost when guaranteeing detection effect.

In some embodiments of the present application, as shown in fig. 1 and 2, the air conditioner further includes an air conditioning system 6, the air conditioning system 6 is disposed inside the box body 1, and an air inlet of the air conditioning system 6 is provided with a third detector 5; the third detector includes an H2 sensor, a CO sensor, and a VOC sensor. Air conditioning system 6 is the common means of maintaining container formula energy storage power station constancy of temperature, its theory of operation is with the air of box 1 inside by air conditioner air intake suction air conditioning system 6, after internal compressor cooling (heating), blow in box 1 again via air conditioner air outlet, but air conditioning system 6's existence can make the air current disorder in the box 1, lead to revealing gaseous detection appearance hysteresis quality, consequently, set up third detector 5 at air conditioning system 6's air intake, when the air intake finds that thermal runaway gas exceeds standard in the air suction process, can report to the police immediately, combine first detector 3 and second detector 4 to arrange accuracy and the timeliness that promotes the early warning.

In addition, the third detector 5 may be disposed at the air outlet of the air conditioning system 6, but since the air at the air outlet is blown out after the internal compressor is operated, which may cause unnecessary false alarm, the third detector 5 is preferably disposed at the air inlet of the air conditioning system 6.

In conclusion, the container type energy storage power station of this application sets up the first detector 3 including the H2 sensor at the top of box 1, because H2 concentration is high, the diffusion is fast, can guarantee the promptness of early warning in the big space to at the inside second detector 4 that sets up including CO sensor and VOC sensor of battery cluster 2, the early warning is rapid and the cost is lower in the little space.

The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present application, and these modifications and substitutions should also be regarded as the protection scope of the present application.

Claims

1. A container-type energy storage power station, comprising: the battery pack comprises a box body, a battery pack, a first detector and a second detector, wherein the battery pack, the first detector and the second detector are all arranged in the box body;

2. The container-type energy storage power station of claim 1 including at least two of said battery clusters and at least two of said first detectors, said at least two battery clusters and said at least two first detectors being arranged in rows.

3. The container-type energy storage power station of claim 2 including at least two rows of said battery clusters with at least one row of said first detectors between adjacent rows of said battery clusters.

4. A container-type energy storage power station as claimed in claim 3 in which at least one row of said first detectors is located intermediate between two adjacent rows of said battery clusters.

5. The container-type energy storage power station of claim 1 wherein the maximum range of the H2 sensor is 28000 to 30000ppm and the maximum range of the CO sensor is 2600 to 3000 ppm.

6. The container-based energy storage power station of claim 1 wherein the second detector is mounted at a top intermediate position of the battery cluster.

7. The container-type energy storage power station of claim 1 wherein the first detectors in the same row are spaced apart from each other by a distance of 1 to 4 meters.

8. The container-type energy storage power station of claim 7 wherein the first detectors in the same row are spaced apart from each other by a distance of 2 to 3 meters.

9. The container type energy storage power station of any one of claims 1 to 8 further comprising an air conditioning system, said air conditioning system being located inside said container body, said air conditioning system having a third detector at an air inlet;

the third detector includes an H2 sensor, a CO sensor, and a VOC sensor.