Cooling fire extinguishing system for data center energy storage

Abstract

The utility model discloses a cooling fire extinguishing system for data center energy storage, and belongs to the technical field of energy storage batteries. According to the technical scheme, the cooling and fire extinguishing system for data center energy storage comprises a shell used for containing a battery pack, and a liquid gathering groove is formed in the bottom wall of the shell; the cooling assembly comprises a liquid inlet end and a liquid outlet end; the liquid inlet end throws a cooling medium into the shell, and the cooling medium acts on the battery pack and then is collected to the liquid collecting tank; the liquid discharging end comprises a first liquid discharging opening communicated with the liquid collecting groove and a second liquid discharging opening which is higher than the liquid collecting groove and is communicated with the inner side and the outer side of the shell; and an electric connection part in the battery pack and an electric connection part of the battery pack and the electric control assembly are positioned above the second liquid outlet. The cooling and fire-fighting system for data center energy storage has the advantages that frequent starting of system protection is avoided, thermal runaway of the system is reduced, and the cooling and fire-fighting system is safe to use.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, and in particular to a cooling and fire protection system for energy storage in a data center. Background Art

[0002] Computing power is a new type of productivity in the digital economy era and a key infrastructure to support the high-quality development of the digital economy. The energy storage unit is the core part of the computing power data center energy storage solution. It is mainly responsible for converting electrical energy into chemical energy or physical energy for storage. When needed, the stored energy is released for use by the data center. When the energy storage unit is charging and discharging, the battery will generate a lot of heat. The temperature of the battery pack is the most important parameter affecting the battery performance and cycle life. If the heat cannot be dissipated in time, the heat will accumulate, resulting in system protection or system failure leading to thermal runaway. When the battery cell explodes, the electrolyte will mix with the coolant, resulting in a loop between the positive and negative electrodes of the battery cell, which will further lead to thermal runaway and heat spread. At the least, the entire battery pack will catch fire, and at the worst, the entire system (such as the container energy storage system) will burn out. Data centers with safety as the core cannot accept the serious risk of explosion and fire of the energy storage system. Utility Model Content

[0003] In order to solve the above problems in the prior art, the utility model provides a cooling fire protection system for data center energy storage that avoids frequent activation of system protection, reduces system thermal runaway, and is safe to use.

[0004] In order to achieve the above-mentioned utility model object, the utility model provides a cooling fire protection system for energy storage in a data center, comprising:

[0005] A shell, used to accommodate the battery pack, wherein the bottom wall of the shell is provided with a liquid collecting groove;

[0006] A cooling assembly, comprising a liquid inlet end and a liquid discharge end; the liquid inlet end feeds a cooling medium into the housing, and the cooling medium acts on the battery pack and then collects in the liquid collecting tank; the liquid discharge end comprises a first liquid discharge port connected to the liquid collecting tank, and a second liquid discharge port higher than the liquid collecting tank and connected to the inside and outside of the housing;

[0007] and an electronic control component, wherein the electrical connection portion in the battery pack and the electrical connection portion between the battery pack and the electronic control component are both located above the second liquid discharge port.

[0008] Furthermore, the electronic control component includes two power connectors electrically connected to the positive and negative electrodes of the battery pack, respectively, and a fuse electrically connected between one of the power connectors and the battery pack.

[0009] Furthermore, the electronic control component also includes an explosion-proof valve arranged on the housing.

[0010] Furthermore, the liquid inlet end comprises:

[0011] A liquid inlet, which passes through and is fixed on the shell;

[0012] A liquid inlet pipe, located in the housing and connected to the liquid inlet;

[0013] And a plurality of branch pipes, one end of which is respectively connected with the liquid inlet pipe, the plurality of branch pipes are located in the shell and arranged directly above the battery pack, and a plurality of spray ports are provided on the branch pipes.

[0014] Furthermore, the opening of the spray port faces obliquely downward.

[0015] Further, the liquid inlet pipe comprises a first liquid inlet pipe and a second liquid inlet pipe arranged in a T-shape;

[0016] One end of the first liquid inlet pipe is connected to the liquid inlet;

[0017] The middle portion of the second liquid inlet pipe is connected to the other end of the first liquid inlet pipe, and a plurality of branch pipes are respectively connected to the second liquid inlet pipe.

[0018] Furthermore, the second liquid inlet pipe is located at one longitudinal end of the shell, the axis of the second liquid inlet pipe is arranged transversely along the shell, one end of the branch pipe is connected to the second liquid inlet pipe, and the other end extends to the other longitudinal end of the shell.

[0019] Furthermore, the cooling assembly also includes a plurality of support rods fixed on the side wall of the shell to provide support for the second liquid inlet pipe.

[0020] Furthermore, the cooling assembly also includes a tube support arranged between the branch tube and the top of the battery pack.

[0021] Furthermore, a curved pipe is provided between the first liquid discharge port and the liquid collecting tank.

[0022] The beneficial effects of the utility model are as follows: the utility model cools down the battery pack by putting a cooling medium into the outer shell, and the cooling medium after heat exchange is gathered in the liquid collecting tank and discharged from the first drain port, so that the heat can be dissipated in time to avoid heat accumulation in the outer shell, greatly reducing the risk of thermal runaway of the system, meeting the use requirements of data centers with safety as the core, and avoiding frequent activation of system protection and reducing thermal runaway caused by system failure; when the liquid in the outer shell cannot be discharged from the first drain port in time and the liquid level rises to the second drain port, the second drain port is used for auxiliary drainage, and safety measures such as system protection are activated at the same time to avoid the accumulated liquid in the outer shell from soaking the electrical connection parts in the battery pack and the electrical connection parts between the battery pack and the electronic control components, thereby avoiding the formation of a loop between the positive and negative electrodes of the battery cell, thereby avoiding thermal runaway and heat spread, and ensuring the safety of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the front view of the utility model;

[0024] Figure 2 It is a schematic diagram of the local structure of the utility model Figure I ;

[0025] Figure 3 This is a schematic diagram of the structure of the utility model after the upper cover is opened;

[0026] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0027] Figure 5 It is a schematic diagram of the partial structure of the bottom plate of the utility model;

[0028] Figure 6 This is a schematic diagram of the appearance structure of the utility model;

[0029] Figure 7 It is a structural schematic diagram of the upper cover in the utility model.

[0030] Among them, the figure markings are: 1. upper cover; 11. cover plate; 12. first connecting hole; 13. sealing groove; 2. shell; 21. bottom plate; 211. flow groove; 212. tooth plate; 213. liquid collecting groove; 214. installation groove; 215. installation part; 217. support rod; 22. side plate; 23. reinforcing rib; 3. battery pack; 31. first electrical connecting plate; 32. second electrical connecting plate; 33. partition; 4. cooling assembly; 40. support rod; 41. liquid inlet; 42. first liquid inlet pipe; 43. second liquid inlet pipe; 44. branch pipe; 45. spray port; 46. elbow pipe; 47. first liquid discharge port; 48. second liquid discharge port; 49. pipe support; 51. power connector; 52. RJ45 connector; 53. explosion-proof valve; 54. fuse; 6. connecting plate. DETAILED DESCRIPTION

[0031] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0032] The present invention provides a cooling and fire protection system for energy storage in a data center, comprising:

[0033] The shell is used to accommodate the battery pack 3, and the bottom wall of the shell is provided with a liquid collecting groove 213; preferably, a connecting plate 6 is provided on the shell to facilitate fixing;

[0034] The cooling assembly 4 includes a liquid inlet end and a liquid discharge end; the liquid inlet end discharges a cooling medium into the outer shell, and the cooling medium acts on the battery pack and then collects in the liquid collecting tank 213; the liquid discharge end includes a first liquid discharge port 47 connected to the liquid collecting tank 213, and a second liquid discharge port 48 higher than the liquid collecting tank 213 and connected to the inner and outer sides of the outer shell; preferably, a bend pipe 46 is provided between the first liquid discharge port 47 and the liquid collecting tank 213, and the cooling medium collected in the liquid collecting tank 213 can be discharged to the first liquid discharge port 48 through the bend pipe 46 and discharged from the outer shell by the siphon principle.

[0035] As well as the electronic control component, the electrical connection parts in the battery pack 3 , and the electrical connection parts between the battery pack 3 and the electronic control component are all located above the second liquid discharge port 47 .

[0036] When in use, the liquid inlet end of the cooling component 4 releases a cooling medium into the outer shell to cool the battery pack 3. The cooling medium after heat exchange is gathered in the liquid collecting tank 213 and discharged from the first drain port 47, so that the heat can be dissipated in time to avoid heat accumulation in the outer shell, greatly reducing the risk of thermal runaway of the system, meeting the use requirements of data centers with safety as the core, and avoiding frequent activation of system protection due to heat accumulation; when the liquid in the outer shell cannot be discharged from the first drain port 47 in time and the liquid level rises to the second drain port 48, the second drain port 48 is used for auxiliary drainage, and safety measures such as system protection are activated at the same time to avoid the collected liquid in the outer shell from contacting the electrical connection parts in the battery pack 3 and the electrical connection parts between the battery pack 3 and the electronic control components, thereby avoiding the formation of a loop between the positive and negative electrodes of the battery cell, thereby avoiding thermal runaway and heat spread, ensuring the safety of the battery box, and reducing the risk of thermal runaway.

[0037] For details, see Figure 6The shell includes a shell 2 with an open top and an upper cover 1 for closing the shell 2. The upper cover 1 is made of aluminum alloy, acrylic or PVC transparent material, and is coated with PE film or insulating powder on the surface. When the upper cover 1 is opened, it can be used for installation, maintenance and other operations inside the shell 2; the shell 2 includes a rectangular bottom plate 21, a side plate 22 arranged around the edge of the top surface of the bottom plate 21, and a plurality of reinforcing ribs 23 arranged on the outer side of the side plate 22, so that the overall pressure resistance of the shell 2 reaches about 100KPa and the deformation is about 5mm; a mounting groove 214 connected end to end is provided at the edge of the bottom plate 21. Preferably, the mounting groove 214 has a width of 3-4mm and a depth of 4-6mm, which is used to install the side plate 22. The bottom of the side plate 22 is fixed in the mounting groove 214 by welding or the like, and the top is bent outward to form a folded edge. A plurality of second connection holes are provided on the folded edge, and the second connection holes correspond to the first connection holes 12 provided on the upper cover 1, see Figure 2 , 7 The upper cover 1 can be fixed to the shell 2 by riveting or bolting to seal the shell 2. Preferably, an O-ring is used to seal the connection between the upper cover 1 and the shell 2. During installation, the O-ring is located on the folded edge and inside the second connecting hole to ensure the sealing effect. A sealing groove 13 for placing the O-ring is provided at the inner side edge of the upper cover and inside the first connecting hole 12. See also Figure 7 , which is convenient for installation and can prevent the O-ring from deformation or displacement, further ensuring the sealing effect;

[0038] A flow groove 211 connected to the liquid collecting groove 213 is provided on the bottom wall of the shell, and the bottom wall of the flow groove 211 is slightly higher than the bottom wall of the liquid collecting groove 213. Preferably, the liquid collecting groove 213 is 1-2 mm deeper than the flow groove 211, and the width of the liquid collecting groove 213 is 60-80 mm. The bottom surface of the battery pack 3 is slightly higher than the bottom wall of the flow groove 211. In the data center, the platform where the energy storage unit is located is usually relatively flat and remains stable during operation. The flow groove 211 with a height difference from the liquid collecting groove 213 can ensure that the cooling medium The cooling medium flows into the liquid collecting tank 213 at the bottom of the battery pack 3, and can ensure that the cooling medium is fully exchanged with the bottom of the battery pack 3 during the flow process, thereby ensuring the heat exchange effect; a plurality of tooth plates 212 are arranged in the flow tank 211, and the cooling medium flows between adjacent tooth plates 212 in the flow tank 211. A plurality of tooth plates 212 are arranged on the bottom wall of the flow tank 211. On the one hand, the battery pack 3 is stably supported to ensure the stability of use, and on the other hand, a plurality of guide channels are formed to guide the cooling medium to avoid the cooling medium from being retained in the flow tank 211. In view of the stable operation of the energy storage unit in the data center, the guide channel is formed in the flow tank 211, which can be more conducive to the flow of the cooling medium in a stable state. Preferably, the tooth plate height is 4-6mm, the thickness is 2-3mm, and the tooth plate spacing is 5-7mm. The evenly arranged tooth plates 212 divide the bottom wall of the shell into uniform guide channels, so that the cooling medium on the bottom wall of the shell is evenly distributed, ensuring that the cooling medium is evenly exchanged with the bottom wall of the battery pack when flowing on the bottom wall of the shell. Heat; the liquid collecting groove 213 is arranged at one end of the shell in the longitudinal direction, which is convenient for arranging the discharge end of the cooling assembly 4. The flow groove 211 is connected to the liquid collecting groove 213 and extends to the other end of the shell in the longitudinal direction. When the cooling medium flows to the bottom wall of the shell, it either directly enters the liquid collecting groove 213 or flows to the liquid collecting groove 213 through the flow groove 211, ensuring that the cooling medium flowing to the bottom wall of the shell smoothly converges to the liquid collecting groove 213; a plurality of tooth pieces 211 are arranged parallel to each other along the longitudinal direction of the shell to improve the flow diversion efficiency; the middle part of the tooth piece 212 is separated, see Figure 2 , 5 Preferably, the partition distance is 10-15 mm. When there is too much cooling medium in the guide channel, it can be diverted from the partition to the adjacent guide channel to further improve the efficiency of the cooling medium converging to the liquid collecting tank 213. The partition is arranged in a straight line;

[0039] See also Figure 2 , 5 In order to facilitate the installation and fixation of the battery pack 3, mounting parts 215 are respectively provided at both ends of the flow groove 211. The mounting parts 215 are bosses arranged at intervals, which facilitate the installation of the battery pack 3 while preventing the flow of the cooling medium from being blocked. The bosses are arranged on the bottom wall of the flow groove 211 and are at the same height as the tooth pieces 212. Spaces are left around the bosses and the tooth pieces to prevent the cooling medium from being retained. During installation, the support rods 217 are installed on the bosses of the mounting parts 215 by bolts, and the two ends of the bottom of the battery pack 3 are supported by the support rods 217 respectively;

[0040] The electric control assembly includes two power connectors 51 electrically connected to the positive and negative electrodes of the battery pack 3, respectively, and a fuse 54 electrically connected between one of the power connectors 51 and the battery pack 3. The battery pack 3 includes a plurality of battery cell groups arranged at intervals and connected in series in sequence. The battery cell group includes a plurality of battery cells arranged at intervals and connected in series in sequence. The cooling medium is injected from the top of the battery pack 3 and toward the battery pack 3. The battery cell groups are arranged at intervals and the battery cells are arranged at intervals, so that the cooling medium injected from the cooling assembly 4 to the top of the battery pack 3 can flow down quickly from the intervals. Adjacent battery cells are separated by partitions 33, and a partition 33 is arranged at each edge of the two sides of the battery cell. The optimal spacing distance is obtained by calculation and test to ensure the heat exchange efficiency when the cooling medium passes through. The adjacent battery cells are separated by partitions 33 at the edges of the two sides of the battery cell to ensure uniform and stable spacing, and the cooling medium passes through the gap between two adjacent battery cells from the middle to further ensure the heat exchange efficiency.

[0041] Preferably, several battery cell groups are arranged parallel to each other along the longitudinal direction of the housing, and the number of battery cell groups is an even number, which is convenient for arranging the electronic control component, so that the liquid inlet 41 and the liquid discharge end of the electronic control component and the cooling component are arranged on the same end side wall of the housing in the longitudinal direction, and the design is reasonable, which is convenient for the layout of the overall system. Figure 1 , 2 As shown, an RJ45 connector 52 is disposed in the middle of one end of the housing, and two power connectors 51 are located on both sides of the RJ45 connector 52. The power connectors 51 are mounted on the housing through a fixing plate; Figure 3 An even number of battery cell groups are connected in series in an S shape, with the head and tail ends both located at one longitudinal end of the housing, and are connected to a power connector 51 disposed at the same longitudinal end of the housing through a first electrical connection sheet 31 .

[0042] The electric control assembly also includes an explosion-proof valve 53 disposed on the housing, see Figure 1 , 6 The explosion-proof valve 53 is located between the two power connectors 51 to further ensure safety in use.

[0043] In one preferred embodiment, the liquid inlet end comprises:

[0044] A liquid inlet 41 is passed through and fixed on the housing;

[0045] The liquid inlet pipe is located in the housing and is connected to the liquid inlet port 41; the liquid inlet pipe includes a first liquid inlet pipe 42 and a second liquid inlet pipe 43 arranged in a T shape; one end of the first liquid inlet pipe 42 is connected to the liquid inlet port 41; the middle of the second liquid inlet pipe 43 is connected to the other end of the first liquid inlet pipe 42, and a plurality of branch pipes 44 are respectively connected to the second liquid inlet pipe 43;

[0046] And a plurality of branch pipes 44, one end of which is respectively connected to the liquid inlet pipe, the plurality of branch pipes 44 are located in the shell and arranged directly above the battery pack 3, and a plurality of spray ports 45 are opened on the branch pipes 44, and the openings of the spray ports 45 face obliquely downward.

[0047] The second liquid inlet pipe 43 is located at one longitudinal end of the shell, and the axis of the second liquid inlet pipe 43 is arranged transversely along the shell. One end of the branch pipe 44 is connected to the second liquid inlet pipe 43, and the other end extends to the other longitudinal end of the shell.

[0048] In one preferred embodiment, the cooling assembly 4 further includes a plurality of support rods 40 fixed to the side wall of the housing to provide support for the second liquid inlet pipe 43, see Figure 2 The support rod 40 is L-shaped, one side of the L-shaped support rod 40 is fixedly connected to the side wall of the shell, and the other side is used to support the second liquid inlet pipe 43. In addition, the supporting component of the second liquid inlet pipe 43 is fixed on the side wall of the shell, that is, the side wall of the shell 2, so that the liquid inlet end of the cooling component 4 and the shell 2 are integrated as a whole, which is convenient for opening and closing the upper cover 1 for maintenance and other operations.

[0049] In one preferred embodiment, the cooling assembly 4 further includes a tube support 49 disposed between the branch tube 44 and the top of the battery pack 3, and the layout is reasonable, see Figure 2-4 The tube support is in an inverted T-shape as a whole. The horizontal part of the T-shape is placed or fixed on the top of the battery pack 3, and a tube clamp is provided at the end of the vertical part. The structure is simple, and the branch pipe 44 can be stably supported. It also ensures that there is a gap between the spray port 45 and the top surface of the battery pack 3 to facilitate uniform spraying and ensure the spraying effect.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A cooling and fire protection system for energy storage in a data center, characterized in that: include: A shell, used to accommodate the battery pack, wherein the bottom wall of the shell is provided with a liquid collecting groove; A cooling assembly, comprising a liquid inlet end and a liquid discharge end; the liquid inlet end feeds a cooling medium into the housing, and the cooling medium acts on the battery pack and then collects in the liquid collecting tank; the liquid discharge end comprises a first liquid discharge port connected to the liquid collecting tank, and a second liquid discharge port higher than the liquid collecting tank and connected to the inside and outside of the housing; and an electronic control component, wherein the electrical connection portion in the battery pack and the electrical connection portion between the battery pack and the electronic control component are both located above the second liquid discharge port.

2. The cooling and fire protection system for energy storage in a data center according to claim 1, characterized in that: The electric control assembly includes two power connectors electrically connected to the positive and negative electrodes of the battery pack, respectively, and a fuse electrically connected between one of the power connectors and the battery pack.

3. The cooling and fire protection system for energy storage in a data center according to claim 2, characterized in that: The electric control component also includes an explosion-proof valve arranged on the housing.

4. The cooling and fire protection system for energy storage in a data center according to claim 1, characterized in that: The liquid inlet end comprises: A liquid inlet, which passes through and is fixed on the shell; A liquid inlet pipe, located in the housing and connected to the liquid inlet; And a plurality of branch pipes, one end of which is respectively connected with the liquid inlet pipe, the plurality of branch pipes are located in the shell and arranged directly above the battery pack, and a plurality of spray ports are provided on the branch pipes.

5. The cooling and fire protection system for energy storage in a data center according to claim 4, characterized in that: The opening of the spray port faces obliquely downward.

6. The cooling and fire protection system for energy storage in a data center according to claim 4, characterized in that: The liquid inlet pipe comprises a first liquid inlet pipe and a second liquid inlet pipe arranged in a T-shape; One end of the first liquid inlet pipe is connected to the liquid inlet; The middle portion of the second liquid inlet pipe is connected to the other end of the first liquid inlet pipe, and a plurality of branch pipes are respectively connected to the second liquid inlet pipe.

7. The data center energy storage cooling and fire protection system according to claim 6, characterized in that: The second liquid inlet pipe is located at one longitudinal end of the shell, the axis of the second liquid inlet pipe is arranged transversely along the shell, one end of the branch pipe is connected to the second liquid inlet pipe, and the other end extends to the other longitudinal end of the shell.

8. The cooling and fire protection system for energy storage in a data center according to claim 6, characterized in that: The cooling assembly also includes a plurality of support rods fixed on the side wall of the shell and providing support for the second liquid inlet pipe.

9. The cooling and fire protection system for energy storage in a data center according to claim 7, characterized in that: The cooling assembly also includes a tube support disposed between the branch tube and the top of the battery pack.

10. The cooling and fire protection system for energy storage in a data center according to claim 1, characterized in that: A curved pipe is arranged between the first liquid discharge port and the liquid collecting tank.

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