Immersed energy storage battery cabinet

Abstract

The utility model discloses an immersed energy storage battery cabinet which comprises a sealed cabinet body, a plurality of battery packs, a vapor chamber assembly and a heat exchange assembly, the sealed cabinet body is provided with a liquid storage cavity, and insulating liquid is stored in the liquid storage cavity; the battery pack is inversely placed in the liquid storage cavity, and one side, provided with the tabs, of the battery pack can be immersed in the insulating liquid; the vapor chamber assembly is attached to the battery pack; the heat exchange assembly comprises an air conditioner and a water tank, the water tank is provided with a plurality of heat exchange pipelines, at least two heat exchange pipelines located at the two ends communicate with each other and communicate with an inlet and an outlet of the air conditioner correspondingly, the air conditioner is used for introducing a heat exchange medium into the heat exchange pipelines, and the water tank makes contact with the vapor chamber assembly to conduct heat exchange with the battery pack. According to the utility model, the usage amount of insulating liquid is reduced by inverting the battery pack, meanwhile, the heat of the battery is conducted out by adopting the uniform temperature plate assembly in a conduction manner, and the battery system has the advantages of no pump and no liquid circulation, no mechanical wear, long service life of the system, low power consumption and the like in a real sense.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an immersion type energy storage battery cabinet. Background Art

[0002] The safety of energy storage systems is receiving more and more attention. At present, the heating of the battery tabs in energy storage systems is particularly serious under high-rate charge and discharge. The rise in battery temperature will inevitably lead to a decline in performance. Once the appropriate temperature is exceeded, dendrites will be generated inside the battery, and even a short circuit will occur inside the battery and cause thermal runaway, eventually catching fire and exploding, endangering the personal safety of passengers.

[0003] At present, the thermal management of energy storage battery cabinets is mainly based on air cooling. The air cooling technology has low heat dissipation efficiency and is prone to problems such as excessive temperature differences. In addition, when the battery is thermally out of control, it is easy to catch fire and explode. At the same time, some people also use immersion cooling methods, which directly immerse the battery pack in insulating liquid for heat exchange, but generally use a full immersion cooling method, which requires a large amount of insulating liquid to immerse the battery pack, which is too expensive. At the same time, the existing immersion cooling requires the design of a circulation loop so that the insulating liquid circulates to dissipate heat. Driving a large amount of insulating liquid to circulate for cooling makes the overall cooling system power consumption high, the system conversion efficiency low, and the heat dissipation effect poor. Utility Model Content

[0004] The main purpose of the utility model is to propose an immersion type energy storage battery cabinet, aiming to reduce the use of insulating liquid, realize the overall system without pump and liquid circulation, and truly realize the advantages of no mechanical wear, long system life and low power consumption.

[0005] To achieve the above-mentioned purpose, the submerged energy storage battery cabinet proposed in the present invention comprises:

[0006] A sealed cabinet having a liquid storage cavity in which insulating liquid is stored;

[0007] A plurality of battery packs, wherein the battery packs are placed upside down in the liquid storage cavity, and a side of the battery packs provided with a tab can be immersed in the insulating liquid;

[0008] A temperature-vaporizing plate assembly, wherein the temperature-vaporizing plate assembly is attached to the battery pack;

[0009] A heat exchange component, the heat exchange component includes an air conditioner and a water tank, the water tank is provided with a plurality of heat exchange pipelines, at least two of the heat exchange pipelines located at both ends are connected and respectively connected to the inlet and outlet of the air conditioner, the air conditioner is used to pass heat exchange medium into the heat exchange pipeline, the water tank contacts the temperature equalizing plate assembly and then performs heat exchange with the battery pack.

[0010] Furthermore, the battery pack has a battery shell on the outer layer that wraps the battery pack, the battery shell is made of aluminum, and the temperature equalizing plate assembly is attached to the battery shell.

[0011] Furthermore, the temperature averaging plate assembly includes a temperature averaging plate and two first heat dissipation pipes connected to the temperature averaging plate, the first heat dissipation pipes are attached to the bottom side of the battery housing, and the temperature averaging plate is sandwiched between the battery housing and the water tank.

[0012] Furthermore, the temperature homogenizing plate is in the shape of a square plate.

[0013] Furthermore, a plurality of second heat exhaust pipes and a third heat exhaust pipe are provided on the side wall of the water tank, the second heat exhaust pipe extends from top to bottom on the side wall of the water tank, the third heat exhaust pipe extends from bottom to top on the side wall of the water tank, and the second heat exhaust pipe and the third heat exhaust pipe are arranged alternately.

[0014] Furthermore, a plurality of the heat exchange pipelines are arranged side by side in the water tank.

[0015] Furthermore, the heat exchange pipeline is arranged in a hollow structure, and each of the heat exchange pipelines is connected with the adjacent heat exchange pipelines in sequence.

[0016] Furthermore, the water tank has a first side plate and a second side plate opposite to each other, the heat exchange pipeline is arranged on the first side plate, the first side plate is attached to the temperature equalizing plate for heat exchange, and the second side plate is provided with a plurality of spare pipelines.

[0017] Furthermore, the water tank has a containing cavity in which a heat-conducting liquid is contained. A plurality of reinforcing plates are arranged in the containing cavity, and the plurality of reinforcing plates are arranged at intervals.

[0018] Furthermore, the sealed cabinet also has a cavity that is not connected to the liquid storage cavity, and a PCS inverter is also arranged in the cavity. The PCS inverter is electrically connected to the battery pack, and the PCS inverter is provided with a heat recovery pipeline. The heat exchange medium flows through the air conditioner and the heat exchange pipeline in sequence to form a heat exchange circuit. The heat recovery pipeline is connected in parallel with the heat exchange circuit, and a switch valve for controlling the on-off of the heat recovery pipeline is provided at the inlet of the heat recovery pipeline.

[0019] Compared with the prior art, the utility model immersion energy storage battery cabinet has the following advantages: (1) The battery pack exchanges heat to the outside, and has static liquid-free circulation inside. It uses contact heat conduction to reliably save energy, and together with the insulating liquid in the liquid storage chamber, it forms a heat storage system. (2) The battery pack is immersed in an inverted position, which can reduce the amount of insulating liquid used and reduce costs. (3) Battery pack spacing expansion detection, long-term reliable detection. In summary, the technical solution of the utility model can reduce the amount of insulating liquid used by inverting the battery pack, and at the same time use a temperature equalizing plate assembly to conduct the heat of the battery pack, realize static thermal management technology, and perform static heat conduction. The battery system is pump-free and liquid-free, and truly realizes many advantages such as no mechanical wear, long system life and low power consumption. Furthermore, the heat of the PCS inverter and the battery pack is heat exchanged through the water tank, which not only increases the heat storage capacity, but also facilitates the reuse of heat, and the system conversion efficiency can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the submerged energy storage battery cabinet of the utility model;

[0021] Figure 2 This is a structural schematic diagram of the submerged energy storage battery cabinet of the utility model from another perspective;

[0022] Figure 3 This is a schematic diagram of the internal structure of the submerged energy storage battery cabinet of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the battery pack, water tank, and air conditioner in the submerged energy storage battery cabinet of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the water tank in the submerged energy storage battery cabinet of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the water tank in the submerged energy storage battery cabinet of the utility model from another perspective;

[0026] Figure 7 It is a schematic diagram of the structure of the battery pack in the submerged energy storage battery cabinet of the utility model;

[0027] Figure 8 It is a schematic diagram of the structure of the battery pack and the temperature equalizing plate assembly separated in the immersion energy storage battery cabinet of the utility model;

[0028] Fig. 9 A schematic diagram of a connection method of heat exchange pipes in the submerged energy storage battery cabinet of the utility model;

[0029] Fig.10 A schematic diagram of another connection method of the heat exchange pipeline in the immersion energy storage battery cabinet of the utility model;

[0030] Fig.11 The utility model is a simplified diagram of the heat exchange circulation flow path in the immersion energy storage battery cabinet.

[0031] Explanation of the accompanying drawings: 100, sealed cabinet; 110, liquid storage chamber; 200, battery pack; 210, battery casing; 220, temperature equalizer assembly; 300, air conditioner; 400, water tank; 410, heat exchange pipeline; 420, heat exchange circuit; 221, first heat exhaust pipe; 222, temperature equalizer; 430, accommodating chamber; 120, cavity; 500, PCS converter; 510, heat recovery pipeline; 520, switch valve; 610, second heat exhaust pipe; 620, third heat exhaust pipe; 440, first side panel; 450, second side panel; 460, spare pipeline; 431, reinforcement plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figures 1 to 11 , the utility model provides an immersion type energy storage battery cabinet.

[0034] The immersed energy storage battery cabinet includes a sealed cabinet 100, a plurality of battery packs 200, a temperature averaging plate assembly 220 and a heat exchange assembly. The sealed cabinet 100 has a liquid storage chamber 110, in which insulating liquid is stored; the battery pack 200 is placed upside down in the liquid storage chamber 110, and the side of the battery pack 200 provided with the pole ear can be immersed in the insulating liquid; the temperature averaging plate assembly 220 is attached to the battery pack 200; the heat exchange assembly includes an air conditioner 300 and a water tank 400, and the water tank 400 is provided with a plurality of heat exchange pipelines 410, at least two heat exchange pipelines 410 located at both ends are connected and respectively connected to the inlet and outlet of the air conditioner 300, and the air conditioner 300 is used to pass heat exchange medium into the heat exchange pipeline 410, and the water tank 400 contacts the temperature averaging plate assembly 220 and then performs heat exchange with the battery pack 200.

[0035] Specifically, the insulating liquid in the submerged energy storage battery cabinet is a non-conductive fluid, and the insulating liquid can be a fluorinated liquid, etc., which will not cause internal short circuits in the battery, and because the insulating liquid used is a non-flammable liquid, the insulating liquid can also immediately extinguish the flames released when the battery is thermally runaway, providing an additional layer of safety. Fig. 9As shown, in this embodiment, the heat exchange pipes 410 at the left and right ends of the water tank 400 are connected to each other, ensuring that the heat exchange between the water tank 400 and the air conditioner 300 is more uniform. Fig.10 As shown, in order to ensure the heat exchange efficiency, all heat exchange pipes 410 can also be connected. It is only necessary to ensure that the air conditioner 300 passes the heat exchange medium into the heat exchange pipe 410 to achieve heat exchange with the water tank 400. The immersed energy storage battery cabinet utilizes the high-efficiency heat conduction characteristics of the temperature plate assembly 220, which can quickly conduct the heat of the battery pack 200, which helps the battery pack 200 and the air conditioner 300 to perform efficient heat exchange. The air conditioner 300 can cool or heat the heat exchange medium flowing through the heat exchange pipe 410 inside the water tank 400, and conduct heat exchange between the battery pack 200 and the insulating liquid inside the liquid storage chamber 110 through heat conduction between the water tank 400 and the temperature plate assembly 220. The temperature of the battery pack 200 is controlled at the optimal operating temperature, and the battery system is pump-free, liquid-free circulation, and low power consumption. In order to further ensure safety, a detection component can be set to detect the distance between two adjacent battery cells in the battery pack 200, and the battery cells can be expanded. The detection is reliable for a long time to improve safety.

[0036] The utility model immersion energy storage battery cabinet has the following advantages: (1) The battery pack 200 is heat exchanged with the outside, and the internal static liquid-free circulation adopts contact heat conduction, which is reliable and energy-saving, and together with the insulating liquid in the liquid storage chamber 110, it forms a heat storage system. (2) The battery pack 200 is immersed in an inverted position, which can reduce the amount of insulating liquid used and reduce costs. (3) The battery pack 200 spacing expansion detection can be carried out for a long time and reliably. In summary, the utility model immersion energy storage battery cabinet can reduce the amount of insulating liquid used by inverting the battery pack 200. At the same time, the heat of the battery pack 200 is conducted out by the temperature plate assembly 220, realizing the static thermal management technology and static heat conduction. The battery system is pump-free and liquid-free, and truly realizes the advantages of no mechanical wear, long system life and low power consumption. Furthermore, the heat of the PCS inverter 500 and the battery pack 200 is heat exchanged through the water tank 400, which not only increases the heat storage capacity, but also facilitates the reuse of heat, and the system conversion efficiency can be further improved.

[0037] See also Figures 7 and 8 Furthermore, the battery pack 200 has a battery housing 210 located on the outer layer and wrapping the battery pack 200. The battery housing 210 is made of aluminum, and the temperature averaging plate assembly 220 is attached to the battery housing 210. Specifically, the aluminum material has good thermal conductivity, and the battery housing 210 made of aluminum can well conduct the heat inside the battery pack 200 to the water tank 400 through the temperature averaging plate assembly 220.

[0038] See also Figures 7 and 8Furthermore, the temperature averaging plate assembly 220 includes a temperature averaging plate 222 and two first heat radiators 221 connected to the temperature averaging plate 222. The first heat radiators 221 are attached to the bottom side of the battery housing 210, and the temperature averaging plate 222 is sandwiched between the battery housing 210 and the water tank 400. Specifically, the temperature averaging plate 222 and the two first heat radiators 221 have the functions of rapid heat conduction and heat diffusion. The heat of the battery pack 200 can be quickly transferred to the water tank 400 for heat exchange through the two first heat radiators 221 and the temperature averaging plate 222. The temperature averaging plate 222 and the first heat radiator 221 can be fixed to the battery housing 210 by screws or the like, or fixed to the battery housing 210 by pasting, so as to ensure the rapid heat conduction function.

[0039] Furthermore, the shape of the temperature averaging plate 222 is a square plate. In this way, since the temperature averaging plate 222 is a square plate with a larger area, the temperature averaging plate 222 and the battery pack 200 are more completely attached, and the heat of the battery pack 200 can be quickly transferred to the water tank 400 for heat exchange, so as to cool or heat the battery pack 200.

[0040] See also Figures 5 and 6 Furthermore, the side wall of the water tank 400 is provided with a plurality of second heat exhaust pipes 610 and third heat exhaust pipes 620. The second heat exhaust pipes 610 extend from top to bottom on the side wall of the water tank 400, and the third heat exhaust pipes 620 extend from bottom to top on the side wall of the water tank 400. The second heat exhaust pipes 610 and the third heat exhaust pipes 620 are arranged alternately. It can be understood that the water tank 400 is a rectangular box with a large area. During the heat exchange process, it is easy for the temperature of each part of the water tank 400 to be uneven, which leads to different heat dissipation efficiencies of the water tank 400 for each battery pack 200, which easily causes the temperature of each battery pack 200 to be inconsistent. By providing the second heat exhaust pipe 610 and the third heat exhaust pipe 620, the characteristics of efficient heat transfer and uniform heat transfer of the heat exhaust pipe are utilized. At the same time, the second heat exhaust pipe 610 and the third heat exhaust pipe 620 are staggered and evenly cover the water tank 400, so that each part of the water tank 400 can be evenly and quickly heat-conducted, further balancing the temperature of each position of the large-area water tank 400, saving materials.

[0041] See also Figures 5 and 6 Furthermore, a plurality of heat exchange pipes 410 are arranged side by side in the water tank 400. The heat exchange pipes 410 may be connected to each other through a hose or other form of pipe body and then connected to the air conditioner 300, or only part of the heat exchange pipes 410 may be connected to the air conditioner 300, so as to ensure that the temperature of the water tank 400 is uniform and then the temperature of each battery pack 200 is uniform.

[0042] See also Fig.10, further, the heat exchange pipeline 410 is arranged in a hollow structure, and each heat exchange pipeline 410 is connected to its adjacent heat exchange pipeline 410 in sequence. A plurality of heat exchange pipelines 410 are arranged on the inner walls on both sides of the water tank 400. In this embodiment, each heat exchange pipeline 410 is connected to the heat exchange pipeline 410 on its right side through a hose, and then can be connected to the air conditioner 300 through a hose, so that its flow path is arranged in a tortuous circuitous manner. Of course, it is also possible to use a plurality of pipelines to merge into one pipeline and then connect to the air conditioner 300. It is only necessary to ensure that the heat exchange pipeline 410 is connected to the air conditioner 300 so that it can achieve a heat exchange effect, and the specific details are not repeated. By setting up multiple heat exchange pipes 410, multiple external pipes of the heat exchange pipes 410 are connected to the air conditioner 300, and the air conditioner 300 transports heat exchange medium to cool or heat the water tank 400, increasing the number of heat exchange pipes 410 increases the contact area between the heat exchange medium and the water tank 400, increasing the heat exchange effect, and improving the heat dissipation effect or heating effect.

[0043] See also Figures 5 and 6 Further, the water tank 400 has a first side plate 440 and a second side plate 450 opposite to each other, the heat exchange pipeline 410 is arranged on the first side plate 440, the first side plate 440 is attached to the temperature balancing plate 222 for heat exchange, and the second side plate 450 is provided with a plurality of spare pipelines 460. Specifically, the spare pipeline 460 has the same function as the heat exchange pipeline 410, and the spare pipeline 460 may be enabled or disabled. When the spare pipeline 460 is enabled, the spare pipeline 460 may be connected to the air conditioner 300 to enhance the heat exchange effect of the water tank 400. When the spare pipeline 460 is not enabled, only the heat exchange pipeline 410 may be connected and connected to the air conditioner 300 to ensure that the heat exchange energy is fully utilized. The heat exchange pipeline 410 is arranged on the first side plate 440, and the first side plate 440 is attached to the temperature averaging plate 222. In this way, since the water tank 400 is a hollow frame structure, the heat exchange efficiency is increased by directly attaching the side of the water tank 400 with the heat exchange pipeline 410 to the battery pack 200.

[0044] See also Figures 5 and 6Furthermore, the water tank 400 has a receiving cavity 430, and a heat-conducting liquid is contained in the receiving cavity 430. A plurality of reinforcing plates 431 are arranged in the receiving cavity 430, and the plurality of reinforcing plates 431 are arranged at intervals. In this way, the heat-conducting liquid contained in the receiving cavity 430 of the water tank 400 can further balance the temperature of the water tank 400, so that the heat dissipation effect of the water tank 400 on the battery pack 200 is consistent, and the temperature consistency between each battery pack 200 is improved. Since the volume of the receiving cavity 430 inside the water tank 400 is large and the water tank 400 is a frame structure, the reinforcing plate 431 is provided in this embodiment to strengthen the structural strength of the water tank 400. When the water tank 400 is installed in the sealed cabinet 100, the receiving cavity 430 of the water tank 400 can be sealed and covered so that the heat-conducting liquid inside it will not flow out, and the temperature of the water tank 400 is balanced. The heat-conducting liquid can be used in a variety of ways, and the heat-conducting liquid can also be the same as the insulating liquid.

[0045] See also Figure 3 and Fig.11 Furthermore, the sealed cabinet 100 also has a cavity 120 that is not interconnected with the liquid storage cavity 110, and a PCS converter 500 is also arranged in the cavity 120. The PCS converter 500 is electrically connected to the battery pack 200, and the PCS converter 500 is provided with a heat recovery pipeline 510. The heat exchange medium flows through the air conditioner 300 and the heat exchange pipeline 410 in sequence to form a heat exchange loop 420. The heat recovery pipeline 510 is connected in parallel with the heat exchange loop 420, and a switch valve 520 for controlling the on-off of the heat recovery pipeline 510 is arranged at the inlet of the heat recovery pipeline 510. The PCS converter 500 can convert direct current into alternating current, or convert alternating current into direct current to meet the needs of the energy storage device. In this way, when the temperature of the battery pack 200 is too low in winter, the switch valve 520 of the heat recovery pipeline 510 is opened, and the heat recovery pipeline 510 is connected to the heat exchange loop 420. The heat stored in the operation of the PCS inverter 500 is used in conjunction with the air conditioner 300 to heat the heat exchange medium inside the heat exchange loop 420 and then heat the battery pack 200, ensuring that the battery pack 200 is at a suitable operating temperature. In this way, by heat recovery of the excess heat generated by the PCS inverter 500, the heat of the PCS inverter 500 and the battery is heat exchanged through the water tank 400, which not only increases the heat storage capacity, but also facilitates the reuse of heat, and the system conversion efficiency can be further improved.

[0046] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An immersion energy storage battery cabinet, characterized in that: The submerged energy storage battery cabinet comprises: A sealed cabinet having a liquid storage cavity in which insulating liquid is stored; A plurality of battery packs, wherein the battery packs are placed upside down in the liquid storage cavity, and a side of the battery packs provided with a tab can be immersed in the insulating liquid; A temperature-vaporizing plate assembly, wherein the temperature-vaporizing plate assembly is attached to the battery pack; A heat exchange component, the heat exchange component includes an air conditioner and a water tank, the water tank is provided with a plurality of heat exchange pipelines, at least two of the heat exchange pipelines located at both ends are connected and respectively connected to the inlet and outlet of the air conditioner, the air conditioner is used to pass heat exchange medium into the heat exchange pipeline, the water tank contacts the temperature equalizing plate assembly and then performs heat exchange with the battery pack.

2. The submerged energy storage battery cabinet according to claim 1, characterized in that: The battery pack has a battery shell on the outer layer that wraps the battery pack, the battery shell is made of aluminum, and the temperature averaging plate assembly is attached to the battery shell.

3. The submerged energy storage battery cabinet according to claim 2, characterized in that: The temperature averaging plate assembly includes a temperature averaging plate and two first heat dissipation pipes connected to the temperature averaging plate, the first heat dissipation pipes are attached to the bottom side of the battery housing, and the temperature averaging plate is sandwiched between the battery housing and the water tank.

4. The submerged energy storage battery cabinet according to claim 3, characterized in that: The shape of the temperature equalizing plate is a square plate.

5. The submerged energy storage battery cabinet according to claim 3, characterized in that: The side wall of the water tank is provided with a plurality of second heat exhaust pipes and a third heat exhaust pipe, the second heat exhaust pipe extends from top to bottom on the side wall of the water tank, the third heat exhaust pipe extends from bottom to top on the side wall of the water tank, and the second heat exhaust pipe and the third heat exhaust pipe are arranged alternately.

6. The submerged energy storage battery cabinet according to claim 1, characterized in that: A plurality of heat exchange pipelines are arranged side by side in the water tank.

7. The submerged energy storage battery cabinet according to claim 6, characterized in that: The heat exchange pipeline is arranged in a hollow structure, and each of the heat exchange pipelines is sequentially connected with the adjacent heat exchange pipelines.

8. The submerged energy storage battery cabinet according to claim 1, characterized in that: The water tank has a first side plate and a second side plate opposite to each other, the heat exchange pipeline is arranged on the first side plate, the first side plate is attached to the temperature equalizing plate for heat exchange, and the second side plate is provided with a plurality of spare pipelines.

9. The submerged energy storage battery cabinet according to claim 8, characterized in that: The water tank has a containing cavity in it, and a heat-conducting liquid is contained in the containing cavity. A plurality of reinforcing plates are arranged in the containing cavity, and the plurality of reinforcing plates are arranged at intervals.

10. The submerged energy storage battery cabinet according to claim 1, characterized in that: The sealed cabinet also has a cavity that is not connected to the liquid storage cavity. A PCS inverter is also arranged in the cavity. The PCS inverter is electrically connected to the battery pack. The PCS inverter is provided with a heat recovery pipeline. The heat exchange medium flows through the air conditioner and the heat exchange pipeline in sequence to form a heat exchange circuit. The heat recovery pipeline is connected in parallel with the heat exchange circuit. A switch valve for controlling the on-off of the heat recovery pipeline is provided at the inlet of the heat recovery pipeline.

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