A heat dissipation device for energy storage system

Abstract

The present invention relates to the technical field of heat dissipation of energy storage batteries, and specifically to a heat dissipation device for an energy storage system, including a fixed splint, a movable splint and a heat exchange plate, wherein the movable splint and the fixed splint are arranged at intervals in the horizontal direction, and the movable splint and the fixed splint can be close to or away from each other in the horizontal direction. The present invention provides a heat exchange plate, in which the heat exchange plate is circular. Compared with the existing rectangular heat exchange plate, the circular heat exchange plate occupies a smaller volume with the same heat exchange area, that is, it can have a higher heat exchange efficiency while occupying the same volume space, and the circular heat exchange plate has a shorter circumference than the rectangular heat exchange plate while having the same heat exchange area, so the length of its sealing path can also be reduced accordingly, thereby achieving the purpose of reducing the risk of cooling medium leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of energy storage batteries, and in particular to a heat dissipation device for an energy storage system. Background Art

[0002] The energy storage system is mainly composed of a containerized machine room, battery pack, battery management system (BMS), energy storage converter and auxiliary control system, most of which are temperature control system and fire protection system. The containerized energy storage system has many advantages, such as small footprint, convenient installation and transportation, short construction period, strong environmental adaptability and high intelligence.

[0003] Due to the complexity and uncertainty of the working conditions during actual use, there will inevitably be a temperature difference between the individual cells in the working state, and it is difficult to ensure the consistency of the battery working temperature. If the temperature difference between the batteries increases, it will affect the performance and service life of the battery module. Therefore, a special heat dissipation structure needs to be set in the energy storage battery module to ensure the temperature consistency of the energy storage battery module. To solve this problem, the prior art mostly adopts a heat dissipation device in a liquid cooling heat exchange mode. For example, the heat exchange system and energy storage system disclosed in the Chinese utility model patent with the authorization announcement number CN221747344U use a plate heat exchanger as a liquid cooling heat exchange device to perform thermal management on the energy storage battery module system. Limited by the volume of the battery module shell, the liquid cooling heat exchange device needs to have a higher heat exchange efficiency as much as possible while occupying the same volume space. The heat exchange plates of the existing plate heat exchangers are usually rectangular. When it is used as a heat dissipation device for the energy storage battery module, it does not conform to the basic design concept of the heat dissipation system of the energy storage battery module. Moreover, when the heat exchange plate is rectangular, a longer sealing path will inevitably be generated, which undoubtedly increases the risk of leakage of the cooling medium. Summary of the invention

[0004] Based on this, it is necessary to provide a heat dissipation device for an energy storage system to address the problems existing in the current heat dissipation device of energy storage batteries, so as to solve the problems of low heat exchange efficiency and high risk of cooling medium leakage when the existing plate heat exchanger is applied to the energy storage battery module.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A heat dissipation device for an energy storage system comprises:

[0007] Fixed splint;

[0008] The movable splint and the fixed splint are arranged at intervals in the horizontal direction, and the movable splint and the fixed splint can be close to or away from each other in the horizontal direction;

[0009] The heat exchange plate is circular, has four flow holes at equal intervals in the circumferential direction of the heat exchange plate, and has multiple heat exchange channels arranged at intervals on the side of the heat exchange plate;

[0010] There are multiple heat exchange plates, which are stacked in a horizontal direction and arranged between a fixed clamping plate and a movable clamping plate;

[0011] An annular sealing groove is also provided on the side of the heat exchange plate. The heat exchange channel is located in the area enclosed by the annular sealing groove. An annular sealing strip is provided in the annular sealing groove. The annular sealing strip is formed by elastic material.

[0012] In one embodiment, a line connecting the center points of the flow holes corresponding to the plurality of heat exchange plates is a spiral line.

[0013] In one of the embodiments, an isolation groove is provided on the side of the heat exchange plate and around two non-adjacent flow holes, and an isolation sealing strip is provided in the isolation groove.

[0014] In one of the embodiments, the isolation groove is connected to the annular sealing groove, and the isolation sealing strip and the annular sealing strip are integrally formed.

[0015] In one of the embodiments, during heat exchange, the heat exchange channels corresponding to two adjacent heat exchange plates are in a disconnected state.

[0016] In one embodiment, two adjacent heat exchange plates are out of phase with each other by 180 degrees.

[0017] In one embodiment, the fixing clamp is provided with a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet.

[0018] In one embodiment, the movable clamping plate is also provided with a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet.

[0019] In one embodiment, flanges are installed at the first fluid inlet, the first fluid outlet, the second fluid inlet and the second fluid outlet to achieve connection with pipelines.

[0020] In one of the embodiments, fastening slots are correspondingly opened around the fixed splint and the movable splint, fastening bolts are arranged in the fastening slots, fastening nuts are threadedly connected to the fastening bolts, and a preset pre-tightening force is provided between the fastening nuts and the side of the movable splint.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention provides a heat exchange plate, in which the heat exchange plate is circular. Compared with the existing rectangular heat exchange plate, the circular heat exchange plate occupies a smaller volume while having the same heat exchange area, that is, it can have a higher heat exchange efficiency while occupying the same volume space. Moreover, compared with the rectangular heat exchange plate, the circular heat exchange plate has a shorter circumference while having the same heat exchange area, so the length of its sealing path can also be reduced accordingly, thereby achieving the purpose of reducing the risk of cooling medium leakage.

[0023] 2. The present invention arranges heat exchange plates so that the line connecting the center points of the flow holes corresponding to the plurality of heat exchange plates is a spiral line. At this time, when the medium flows through the flow path formed by the spiral flow holes, the centrifugal force of the medium flow can be increased, so that the impurities in the hot / cold medium are more easily centrifuged to the flow holes corresponding to the heat exchange plates near the inlet, and are not easy to be dispersed and blocked in the flow holes corresponding to each heat exchange plate. At the same time, it can also shorten the distance that the impurities in the hot / cold medium move along the flow path, so that the impurities can be concentrated on several heat exchange plates near the hot / cold medium inlet. In this way, when cleaning the impurities in the hot / cold medium, it is only necessary to disassemble several heat exchange plates near the hot / cold medium flow inlet without disassembling all of them, thereby shortening the time for cleaning and replacing the heat exchange plates and improving the maintenance efficiency of the staff.

[0024] 3. The present invention is provided with a heat exchange plate. When the line connecting the center points of the flow holes of the heat exchange plate is a spiral line, compared with the case where the line connecting the center points of the flow holes is a straight line, the hot / cold medium has a better temperature difference distribution during heat exchange, the disturbance effect is also stronger, and the thermal short circuit is also reduced, thereby enabling higher heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of the energy storage battery module;

[0026] Figure 2 for Figure 1 Side view of

[0027] Figure 3 for Figure 2 Middle AA section view;

[0028] Figure 4 It is an overall schematic diagram of a heat dissipation device for an energy storage system according to the present invention;

[0029] Figure 5 A schematic diagram of stacking heat exchange plates in a heat dissipation device for an energy storage system according to the present invention;

[0030] Figure 6 The figure is a schematic diagram of the position of an isolation sealing strip in a heat dissipation device of an energy storage system according to the present invention.

[0031] in:

[0032] 100, fixed clamp; 110, first fluid inlet; 120, first fluid outlet; 130, second fluid inlet; 140, second fluid outlet; 150, flange; 160, fastening slot; 170, fastening bolt; 171, fastening nut; 200, movable clamp; 300, heat exchange plate; 310, flow hole; 320, heat exchange channel; 330, annular sealing groove; 340, isolation groove; 400, annular sealing strip; 410, isolation sealing strip; 510, housing; 520, heat conductive carrier; 530, battery pack. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] like Figure 1-Figure 6As shown, a heat dissipation device for an energy storage system is arranged in an energy storage battery module, and the heat dissipation device for the energy storage system includes a fixed clamping plate 100, a movable clamping plate 200 and a heat exchange plate 300. The movable clamping plate 200 and the fixed clamping plate 100 are arranged at intervals in the horizontal direction, and the movable clamping plate 200 and the fixed clamping plate 100 can be close to or away from each other in the horizontal direction. The heat exchange plate 300 is circular, and the heat exchange plate 300 is provided with flow holes 310 that penetrate the thickness direction thereof. The flow holes 310 are uniformly distributed along the circumference of the heat exchange plate, and the side of the heat exchange plate 300 is provided with a spacer. Multiple heat exchange channels 320 are configured, and the multiple heat exchange channels 320 can be connected to two non-adjacent flow holes 310 among the four flow holes 310. There are multiple heat exchange plates 300, and the multiple heat exchange plates 300 are stacked in the horizontal direction and arranged between the fixed clamping plate 100 and the movable clamping plate 200. An annular sealing groove 330 is also opened on the side of the heat exchange plate 300. The heat exchange channel 320 is located in the area enclosed by the annular sealing groove 330. An annular sealing strip 400 is provided in the annular sealing groove 330, and the annular sealing strip 400 is prepared and molded by an elastic material.

[0037] It should be supplemented that the energy storage battery module includes a shell 510, a heat-conducting carrier 520 and a plurality of battery packs 530. The heat-conducting carrier 520 is arranged in the shell 510, and the plurality of battery packs 530 are arranged on the heat-conducting carrier 520. The heat dissipation device of the energy storage system is specifically arranged at the bottom of the shell 510 and below the heat-conducting carrier 520. The battery pack 530 is installed on the heat-conducting carrier 520. The heat-conducting carrier 520 is provided with a guide hole, which is connected to one of the flow holes 310. The flow hole 310 serves as an inlet for the heat medium. This is to make the battery pack The heat generated by the operation of 530 can be absorbed by the heat-conducting carrier 520. Further, the heat absorbed by the heat-conducting carrier 520 is absorbed by the heat medium flowing through the guide hole, so that the battery pack 530 is cooled in time to prevent the battery pack 530 from being overheated. Among the remaining three flow holes 310, the flow hole 310 that is diagonally opposite to the flow hole 310 serves as the outlet of the heat medium, and the other two flow holes 310 are also in diagonal positions at this time, one of the flow holes 310 serves as the inlet of the cold medium, and the other flow hole 310 serves as the outlet of the cold medium.

[0038] It should also be noted that the fixed splint 100 is provided with a first fluid inlet 110, a first fluid outlet 120, a second fluid inlet 130 and a second fluid outlet 140, the first fluid is a hot medium, the second fluid is a cold medium, the first fluid inlet 110 is connected to a flow hole 310 serving as a hot medium flow inlet, the flow hole 310 at a diagonal position is connected to the first fluid outlet 120, the second fluid inlet 130 is connected to the flow hole 310 serving as a cold medium flow inlet, and the second fluid outlet 140 is connected to the flow hole 310 serving as a cold medium flow outlet, and the movable splint 200 is also provided with a first fluid inlet 110, a first fluid outlet 120, a second fluid inlet 130 and a second fluid outlet 140, and flanges 150 are installed at the first fluid inlet 110, the first fluid outlet 120, the second fluid inlet 130 and the second fluid outlet 140 to achieve connection with the pipeline.

[0039] It should also be noted that, during heat exchange, the heat exchange channels 320 corresponding to two adjacent heat exchange plates 300 are in a disconnected state. Specifically, taking any one heat exchange plate 300 as an example, the heat exchange channel 320 corresponding to the heat exchange plate 300 and the heat exchange channel 320 corresponding to another heat exchange plate 300 separated from it by one heat exchange plate 300 are in a connected state. In this way, two heat exchange flow paths that are not connected to each other but are adjacent are formed between the heat exchange plates 300, and the cold medium and the hot medium can perform heat exchange through the heat exchange plates 300.

[0040] During installation, the fixed clamp plate 100 and the movable clamp plate 200 are brought close to each other, and the multiple heat exchange plates 300 are clamped between the fixed clamp plate 100 and the movable clamp plate 200, and the annular sealing strip 400 is ensured to be in a compressed state, so that the interior of the heat exchange channel 320 is not connected to the outside air, and then the flange 150 corresponding to the first fluid inlet 110 is first connected to the output end of the first circulation pump, and then the flange 150 corresponding to the first fluid outlet 120 is connected to the input end of the first circulation pump, and then the second fluid inlet 130 is connected to the output end of the second circulation pump, and finally the second fluid outlet 140 is connected to the input end of the second circulation pump. In addition, a condenser should be set at the input end of the second circulation pump to cool the cold medium flowing through the input end of the second circulation pump.

[0041] When the energy storage battery module is in operation, the first circulation pump, the second circulation pump and the condenser (not shown in the figure) are started at the same time. Under the action of the first circulation pump, the hot medium flows from the first fluid inlet 110 into the heat exchange channel 320 connected thereto, and then flows out from the first fluid outlet 120, so as to continue the circulation. At the same time, under the action of the second circulation pump, the cold medium flows from the second fluid inlet 130 into the heat exchange channel 320 connected thereto, and then flows out from the second fluid outlet 140, so as to continue the circulation. In this process, the heat generated by the battery pack 530 when it is powered on is absorbed by the heat conductive carrier 520, and the heat absorbed by the heat conductive carrier 520 is absorbed by the hot medium, so that the temperature of the hot medium increases. Because the temperature of the hot medium is higher than that of the cold medium, the hot medium and the cold medium perform heat exchange through the heat exchange plate 300, so that the heat in the hot medium is transferred to the cold medium, so that the temperature of the hot medium is reduced, thereby maintaining the normal operation of the energy storage battery module.

[0042] It can be understood that in the present invention, the heat exchange plate 300 is circular. Compared with the existing rectangular heat exchange plate 300, the circular heat exchange plate 300 occupies a smaller volume while having the same heat exchange area, that is, it can have a higher heat exchange efficiency while occupying the same volume of space. Moreover, compared with the rectangular heat exchange plate 300, the circular heat exchange plate 300 has a shorter circumference while having the same heat exchange area, so the length of its sealing path can also be reduced accordingly, thereby achieving the purpose of reducing the risk of cooling medium leakage.

[0043] As the use time of the hot medium and the cold medium increases, a certain amount of impurities will be generated in the hot medium and the cold medium. The impurities will gradually clog the flow holes 310 as the medium flows, causing the flow resistance of the hot medium and the cold medium to increase, thereby causing the heat exchange efficiency of the hot medium and the cold medium to decrease. To solve this problem, the staff usually removes all the heat exchange plates 300 to clean the heat exchange plates 300, which will result in a longer replacement time and a longer cleaning time for the heat exchange plates 300. In order to shorten the cleaning and replacement time of the heat exchange plates 300 and improve the maintenance efficiency of the staff, in a further embodiment, as Figure 5 As shown, the line connecting the center points of the flow holes 310 corresponding to the plurality of heat exchange plates 300 is a spiral line.

[0044] To achieve the above purpose, when installing the heat exchange plate 300, the staff can rotate the heat exchange plate 300 installed later clockwise or counterclockwise around its axis at a certain angle relative to the heat exchange plate 300 installed earlier, generally five to ten degrees, so that the line connecting the center points of the flow holes 310 corresponding to the multiple heat exchange plates 300 is a spiral line. At this time, when the medium flows through the flow path formed by the spiral flow holes 310, the centrifugal force of the medium flow can be increased, so that the impurities in the hot / cold medium are more easily centrifuged to the heat exchange plate 300 near the inlet. Meanwhile, the distance that the impurities in the hot / cold medium move along the flow path can be shortened, so that the impurities can be concentrated on several heat exchange plates 300 near the hot / cold medium inlet. In this way, when cleaning the impurities in the hot / cold medium, it is only necessary to disassemble several heat exchange plates 300 near the hot / cold medium flow inlet without disassembling all of them, thereby shortening the time for cleaning and replacing the heat exchange plates 300 and improving the maintenance efficiency of the staff.

[0045] It can be understood that when the line connecting the center points of the circulation holes 310 is a spiral line, compared to the case where the line connecting the center points of the circulation holes 310 is a straight line, the hot / cold medium has a better temperature difference distribution during heat exchange, the disturbance effect is also stronger, and the thermal short circuit is also reduced, thereby enabling higher heat exchange efficiency.

[0046] In order to form two heat exchange flow paths that are not interconnected but adjacent to each other between the heat exchange plates 300, in a further embodiment, as shown in FIG. Figure 5 and Figure 6 As shown, an isolation groove 340 is provided on the side of the heat exchange plate 300 and around two non-adjacent flow holes 310, and an isolation sealing strip 410 is provided in the isolation groove 340. When the isolation sealing strip 410 is installed in the isolation groove 340, in the working state, the flow hole 310 corresponding to the isolation sealing strip 410 is isolated from the heat exchange channel 320, and the two adjacent heat exchange plates 300 are staggered by one hundred and eighty degrees.

[0047] When installing the heat exchange plates 300, the staff should rotate the heat exchange plate 300 installed later by one hundred and eighty degrees relative to the heat exchange plate 300 installed earlier. This is to stagger the positions of the isolation grooves 340. After the isolation sealing strip 410 is installed into the isolation grooves 340, two heat exchange flow paths that are not connected to each other but adjacent are formed between the multiple heat exchange plates 300. Next, the heat exchange plate 300 installed later is rotated five to ten degrees clockwise or counterclockwise relative to the heat exchange plate 300 installed earlier.

[0048] It is understandable that in the prior art, there are two types of heat exchange plates 300, and the two types of heat exchange plates 300 need to be installed alternately so that two heat exchange flow paths that are not connected to each other but adjacent to each other can be formed between the heat exchange plates 300. In the present device, there is only one type of heat exchange plate 300, and during installation, the heat exchange plate 300 installed later only needs to be rotated one hundred and eighty degrees compared to the heat exchange plate 300 installed earlier, which has lower usage costs.

[0049] In a further embodiment, Figure 5 As shown, the isolation groove 340 is connected to the annular sealing groove 330 , and the isolation sealing strip 410 and the annular sealing strip 400 are integrally formed.

[0050] The isolation sealing strip 410 and the annular sealing strip 400 are integrally formed in order to enhance the sealing performance of the device.

[0051] In a further embodiment, Figure 4 As shown, fastening slots 160 are correspondingly opened around the fixed clamp plate 100 and the movable clamp plate 200, and fastening bolts 170 are arranged in the fastening slots 160. The fastening bolts 170 are threadedly connected with fastening nuts 171, and there is a preset pre-tightening force between the fastening nuts 171 and the side of the movable clamp plate 200.

[0052] During installation, the fastening nut 171 is rotated to bring the fixed clamping plate 100 and the movable clamping plate 200 closer to each other, thereby clamping the heat exchange plate 300 between the fixed clamping plate 100 and the movable clamping plate 200, and increasing the pre-tightening force between the fastening nut 171 and the side of the movable clamping plate 200 to a preset pre-tightening force. During disassembly, the fastening nut 171 is rotated in the opposite direction so that the fixed clamping plate 100 and the movable clamping plate 200 no longer clamp the heat exchange plate 300, so that the heat exchange plate 300 can be removed and cleaned.

[0053] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A heat dissipation device for an energy storage system, arranged in an energy storage battery module, characterized in that: include: Fixed splint; The movable splint and the fixed splint are arranged at intervals in the horizontal direction, and the movable splint and the fixed splint can be close to or away from each other in the horizontal direction; The heat exchange plate is circular, has four flow holes at equal intervals in the circumferential direction of the heat exchange plate, and has multiple heat exchange channels arranged at intervals on the side of the heat exchange plate; There are multiple heat exchange plates, which are stacked in a horizontal direction and arranged between a fixed clamping plate and a movable clamping plate; An annular sealing groove is also provided on the side of the heat exchange plate. The heat exchange channel is located in the area enclosed by the annular sealing groove. An annular sealing strip is provided in the annular sealing groove. The annular sealing strip is made of elastic material. The line connecting the center points of the flow holes corresponding to the multiple heat exchange plates is a spiral line.

2. The heat dissipation device of an energy storage system according to claim 1, characterized in that: An isolation groove is provided on the side of the heat exchange plate and around two non-adjacent flow holes, and an isolation sealing strip is provided in the isolation groove.

3. The heat dissipation device of an energy storage system according to claim 2, characterized in that: The isolation groove is connected to the annular sealing groove, and the isolation sealing strip and the annular sealing strip are integrally formed.

4. The heat dissipation device for an energy storage system according to claim 1, characterized in that: During heat exchange, the heat exchange channels corresponding to two adjacent heat exchange plates are in a disconnected state.

5. The heat dissipation device for an energy storage system according to claim 4, characterized in that: The phases of two adjacent heat exchange plates are staggered by 180 degrees.

6. The heat dissipation device for an energy storage system according to claim 1, characterized in that: The fixing clamping plate is provided with a first fluid inlet, a first fluid outlet, a second fluid inlet and a second fluid outlet.

7. The heat dissipation device for an energy storage system according to claim 1, characterized in that: The movable clamping plate is also provided with a first fluid inlet, a first fluid outlet, a second fluid inlet and a second fluid outlet correspondingly.

8. The heat dissipation device for an energy storage system according to claim 6 or 7, characterized in that: Flanges are installed at the first fluid inlet, the first fluid outlet, the second fluid inlet and the second fluid outlet to achieve connection with pipelines.

9. The heat dissipation device for an energy storage system according to claim 1, characterized in that: The fixed clamping plate and the movable clamping plate are respectively provided with fastening slots around them, fastening bolts are arranged in the fastening slots, fastening nuts are threadedly connected to the fastening bolts, and a preset pre-tightening force is provided between the fastening nuts and the side surfaces of the movable clamping plate.

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