Refrigerating device for battery energy storage cabinet and battery energy storage cabinet

Abstract

The utility model relates to a refrigerating device for a battery energy storage cabinet and the battery energy storage cabinet. The refrigerating device comprises a water storage part, a spraying part and a collecting pipe, the water storage part is used for providing cooling water; one end of the spraying part is connected to the water storage part, and the other end is used for spraying cooling water to the inner wall of the energy storage cabinet body; one end of the collecting pipe penetrates through the bottom plate of the energy storage cabinet body, and the other end is connected into a water collecting tank outside the energy storage cabinet body; recycled water collected in the water collecting tank can be circularly used in the water storage part after being cooled. The heat conductivity of cooling water is far higher than that of air, high-density heat can be rapidly taken away, and the heat dissipation effect is good under the conditions that the charging and discharging power of the battery is large and battery modules are dense; and a water cooling and air cooling combined mode is adopted, so that the working temperature of the battery can be effectively controlled, and performance reduction and service life shortening caused by long-time high-temperature operation of the battery are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat management, and specifically relates to a refrigerating plant for battery energy storage cabinet and battery energy storage cabinet. BACKGROUND

[0002] The battery energy storage cabinet is a device for storing electrical energy, usually composed of lithium ion batteries, and equipped with relevant electronic control and monitoring systems. Since heat is generated during the charging and discharging process of the battery, the battery energy storage system needs a cooling device to control the temperature to ensure the normal operation of the battery and prolong its life.

[0003] The utility model discloses a kind of air-cooled energy storage battery cabinets, and the application date is December 20, 2023, and the utility model name is a kind of air-cooled energy storage battery cabinets, which relates to battery cabinet technical field.The air-cooled energy storage battery cabinet includes: air inlet side plate, air outlet side plate and battery cabinet;Air inlet side plate and air outlet side plate are both hollow structure;The side of battery cabinet close to air inlet side plate is provided with first air inlet group;The first air inlet group is arranged in battery cabinet close to;The side of air inlet side plate close to battery cabinet is provided with first air outlet group;The side of battery cabinet close to air outlet side plate is provided with second air outlet group;The side of air outlet side plate close to battery cabinet is provided with second air inlet group;The bottom of air outlet side plate is provided with total air outlet.The utility model can complete dust prevention and heat dissipation of air-cooled energy storage battery cabinet by setting hollow air inlet side plate and air outlet side plate.

[0004] The above-mentioned prior art uses air-cooled cooling method, and the heat dissipation efficiency is limited, and is easily affected by environmental temperature and air flow. In the case of high battery charging and discharging power, large number of battery modules and dense arrangement, air cooling may be difficult to quickly reduce the temperature and maintain it in the ideal range, which will affect the performance and life of the battery. UTILITY MODEL CONTENTS

[0005] In view of the limited heat dissipation efficiency of the above-mentioned prior art, the purpose of the utility model is to provide a refrigerating plant for battery energy storage cabinet and battery energy storage cabinet, which can improve the heat dissipation efficiency, effectively control the working temperature of the battery and prolong the life of the battery.

[0006] The technical scheme provided by the utility model is as follows:

[0007] A refrigerating plant for battery energy storage cabinet, comprising:

[0008] Water storage part, the water storage part is used for providing cooling water, and the water storage part is located above the energy storage cabinet body for storing batteries;Placing the water storage part above can make full use of the idle space above the battery energy storage cabinet, so that the space layout of the entire energy storage system is more compact and reasonable, and the space utilization is improved;

[0009] The spraying part is hollow, one end of which is used for connecting to the water storage part, and the other end is used for spraying cooling water to the inner wall of the energy storage cabinet body; through the heat absorption of liquid evaporation and the heat conduction with the inner wall, a large amount of heat generated in the process of battery system operation can be quickly taken away, the efficiency is higher than that of pure air heat dissipation, the performance of the battery system can be effectively prevented from being reduced due to overheating, the service life is shortened, and the battery can be stably worked at a suitable temperature.

[0010] The collecting pipe is through the bottom plate of the energy storage cabinet body at one end and is connected to the water collecting box outside the energy storage cabinet body at the other end; the recycled water collected in the water collecting box can be recycled for the water storage part after being cooled.

[0011] Further, the cooling part includes a water inlet pipe, a water outlet pipe and a heat dissipation pipe connecting the water inlet pipe and the water outlet pipe; the water inlet pipe is used for connecting to the water storage part; the recycled water flowing out of the water outlet pipe flows into the water collecting box; the heat dissipation pipe is located inside the energy storage cabinet body, and the heat dissipation pipe and the battery system are arranged close to each other, so that the heat generated in the charging and discharging process of the battery can be directly absorbed; the heat dissipation pipe quickly conducts the collected battery heat to the cooling water in the pipe, so that the heat can be taken away from the battery energy storage cabinet through the flow of the heat dissipation medium, and efficient heat transfer is realized.

[0012] Further, the water storage part includes a water storage box and a water suction pump arranged inside the water storage box, and the water inlet pipe is connected to the water suction pump, so that the water suction pump can continuously and stably output cooling water.

[0013] Further, the spraying head is an arc-shaped elbow pipe, the end of the arc-shaped elbow pipe is arranged obliquely downward, and the arc-shaped elbow pipe is used for spraying cooling water to the inner wall of the first side surface of the energy storage cabinet body; the spraying head can uniformly spray the cooling water on the inner wall of the first side surface, and since the arc-shaped elbow pipe is arranged obliquely downward, the cooling water cannot be sprayed on the battery.

[0014] Further, the heat dissipation pipe includes a plurality of U-shaped pipes arranged uniformly along the height direction of the energy storage cabinet body, the two ends of each U-shaped pipe are connected to the upper and lower adjacent U-shaped pipes through bending parts respectively; the bending parts at the two ends of each U-shaped pipe are axisymmetric relative to the center axis of the U-shaped pipe; the contact area of the meandering heat dissipation pipe is larger than that of the straight heat dissipation pipe. The larger contact area means that the heat dissipation pipe can more fully exchange heat with the surrounding medium, so that the heat generated by the battery can be more quickly dissipated, thereby effectively reducing the temperature of the battery system and protecting the performance and service life of the battery system.

[0015] Further, a ventilation assembly is further included, the ventilation assembly comprising a ventilation opening and a fan part; the ventilation opening is arranged on the second side of the energy storage cabinet body; the fan part is arranged in the ventilation opening, the fan part is connected with an external power supply, and the external power supply is used for driving the fan part to rotate; the battery energy storage cabinet is efficiently cooled through the combined mode of air cooling and water cooling.

[0016] The battery energy storage cabinet further comprises the refrigeration device and an explosion-proof glass, the explosion-proof glass is embedded in a through hole arranged on the third side of the energy storage cabinet body; and the explosion-proof glass has the advantages of safety protection and convenient observation.

[0017] Further, the energy storage cabinet body is provided with a cabinet door, one side of the cabinet door is connected with the first side of the energy storage cabinet body through a hinge; the hinge enables the cabinet door to rotate around a fixed shaft, so that the cabinet door can be easily opened and closed, and an operator can open the cabinet door at any time to check, maintain, repair or replace the equipment in the battery energy storage cabinet, so that the operation is convenient and the work efficiency is improved.

[0018] Further, the bottom of the energy storage cabinet body is provided with a plurality of supports, and the height of the supports is substantially equal to the height of the water collecting box.

[0019] Compared with the prior art, the technical scheme has the following beneficial effects:

[0020] (1) The thermal conductivity of the cooling water is much higher than that of air, and high-density heat can be quickly taken away, so that the heat dissipation effect is good in the case that the battery charging and discharging power is large and the battery modules are dense.

[0021] (2) The combination of water cooling and air cooling can effectively control the battery working temperature and avoid performance degradation and service life shortening caused by long-time high-temperature operation of the battery.

[0022] (3) The water cooling scheme reduces the volume and space occupied by the heat dissipation system, and compared with the traditional air-cooled container, the occupied area can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the battery energy storage cabinet in an embodiment of the present application;

[0024] Figure 2 FIG. 3 is a schematic diagram of the position of the heat dissipation pipe in an embodiment of the present application;

[0025] Figure 3 FIG. 5 is a schematic diagram of the structure of the spraying part and the cooling part in an embodiment of the present application;

[0026] Figure 4 FIG. 6 is a schematic diagram of the structure of the spraying part and the cooling part in an embodiment of the present application; and Figure 3Structure diagram of the middle A node;

[0027] Figure 5 A cross-sectional view of the battery energy storage cabinet in an embodiment of the application.

[0028] Explanation of the reference numerals in the schematic diagram:

[0029] Energy storage cabinet body 1, first side surface 11, second side surface 12, third side surface 13, explosion-proof glass 14, cabinet door 15, support 16, ventilation opening 121, fan part 122;

[0030] Water storage part 2, water storage tank 21, water suction pump 22;

[0031] Spraying part 3, spraying pipe 31, spraying head 32;

[0032] Collecting pipe 4;

[0033] Water collecting tank 5;

[0034] Water inlet pipe 61, water outlet pipe 62, heat dissipation pipe 63, U-shaped pipe 631, bending part 632. DETAILED DESCRIPTION

[0035] In order to further understand the content of the present application, the present application will be described in detail in conjunction with the drawings and examples.

[0036] The structure, proportion, size, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions that can be implemented by the present application, so they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like used in the specification are only for the convenience of clear description, and are not used to limit the implementable range, the change or adjustment of the relative relationship without substantial change of the technical content is also considered as the implementable scope of the present application.

[0037] The battery energy storage cabinet is a device specially designed to store electrical energy, which stores electrical energy when the power supply is sufficient, and releases electrical energy when the power demand is high or the power is insufficient, to achieve stable power supply and efficient use of power.

[0038] During the low load period of the power grid, the battery energy storage cabinet can charge with low-price electricity to store electrical energy; during the peak load period of the power grid, the stored electrical energy is released to meet the electricity demand, achieving "peak clipping and valley filling", helping users to reduce electricity costs, and also reducing the load pressure of the power grid.

[0039] As a backup power supply, the battery energy storage cabinet can quickly provide power for critical equipment and important loads in the event of power grid failure, power outage or other emergencies, ensuring the normal operation of hospitals, data centers, communication base stations and other places, and protecting the continuity of life safety, social order and important business.

[0040] The battery energy storage cabinet cooperates with the intelligent energy management system. The battery energy storage cabinet can store and distribute energy reasonably according to the user's power consumption habits, electricity price policy and equipment running state, realize the optimization of energy utilization, and improve the energy utilization efficiency.

[0041] In the process of battery charging and discharging, in addition to the normal electrochemical reaction to realize the storage and release of electric energy, some side reactions will inevitably occur. For example, when charging, lithium ion battery will generate heat. If the temperature is too high, the chemical reaction rate inside the battery will change, resulting in the decrease of the charging and discharging efficiency of the battery. When charging, the battery may need longer time to be fully charged, and when discharging, the output current and voltage may be unstable, which cannot meet the normal operation demand of the equipment.

[0042] The technical scheme of the present application comprises an energy storage cabinet body 1 for storing a battery system and a water storage part 2 located above the energy storage cabinet body 1, the water storage part 2 is used to provide cooling water, the connection mode of the water storage part 2 and the energy storage cabinet body 1 can be fixed connection or detachable connection, or the water storage part 2 is directly placed on the top of the energy storage cabinet body 1.

[0043] It also comprises a spraying part 3, a collecting pipe 4 and a water collecting tank 5 used in cooperation, the spraying part 3 is hollow, one end of which is used to access the water storage part 2, and the other end is used to spray cooling water to the inner wall of the energy storage cabinet body 1. One end of the collecting pipe 4 penetrates through the bottom plate of the energy storage cabinet body 1, and the other end accesses the water collecting tank 5 outside the energy storage cabinet body 1. The recycled water collected in the water collecting tank 5 can be recycled in the water storage part 2 after being cooled.

[0044] More specifically, the water storage part 2 comprises a water storage tank 21 and a water suction pump 22 placed inside the water storage tank 21, the function of the water suction pump 22 is to discharge the cooling water in the water storage tank 21 at a certain speed and pressure.

[0045] The spraying part 3 comprises a spraying pipe 31 and a spraying head 32 connected with the end of the spraying pipe 31, wherein the spraying pipe 31 accesses the water storage part 2, specifically accesses the water suction pump 22, and the spraying head 32 is preferably an arc-shaped elbow pipe, the end of which is arranged obliquely downward, used to spray cooling water to the inner wall of the first side surface 11 of the energy storage cabinet body 1. The end of the arc-shaped elbow pipe is obliquely downward, in order to avoid splashing of the cooling water.

[0046] To prevent the cooling water sprayed from the spray section 3 from splashing, the nozzles at the end of the curved pipe can be atomizing nozzles or fine water mist nozzles. These nozzles can atomize the water into tiny particles, preventing water droplets from splashing. In addition, the output power of the water pump can be controlled to adjust the water flow speed and pressure within the spray section 3 to avoid water droplet splashing.

[0047] The spray head 32 allows the cooling water to be better dispersed and fully contacted with the surrounding air. As the water evaporates, it carries away the heat generated by the battery inside the energy storage cabinet body 1 during operation.

[0048] The refrigeration unit also includes a cooling section, which includes an inlet pipe 61, an outlet pipe 62, and a heat dissipation pipe 63. The two ends of the heat dissipation pipe 63 are connected to the inlet pipe 61 and the outlet pipe 62, respectively, and the heat dissipation pipe 63 is located inside the energy storage cabinet body 1. The inlet pipe 61 is connected to the water storage section 2, specifically to the water suction pump 22, and the recycled water flowing out of the outlet pipe 62 flows into the water collection tank 5.

[0049] More specifically, the heat dissipation pipe 63 includes a plurality of U-shaped pipes 631 evenly arranged along the height direction of the energy storage cabinet body 1. Each U-shaped pipe 631 has its two ends connected to the adjacent U-shaped pipes above and below through bending portions 632. The bending portions 632 at both ends of each U-shaped pipe 631 are axially symmetrical with respect to the central axis of the U-shaped pipe.

[0050] The energy storage cabinet body 1 also includes a third side 13, and the heat dissipation pipe 63 is adjacent to the inner wall of the third side 13. Along the height direction of the energy storage cabinet body 1, the width of the U-shaped pipe 631 is approximately equal to the width of the inner wall of the third side 13.

[0051] The technical solution of this application maximizes the area of ​​the heat dissipation pipe 63. Since heat dissipation effect is closely related to surface area, the surface area of ​​the heat dissipation pipe is significantly increased by bending it back and forth. After bending, the heat dissipation pipe of the same length can present more sides and corners. These additional parts can participate in the heat dissipation process and carry away the heat generated by the battery in the main body 1 of the energy storage cabinet during operation.

[0052] The refrigeration device also includes a ventilation assembly, which includes a vent 121 and a fan 122. The vent 121 is located on the second side 12 of the energy storage cabinet body 1, and the fan 122 is located inside the vent 121. The fan 122 is connected to an external power source and is driven to rotate by the external power source.

[0053] The fan part 122 has two functions, one is to circulate part of the heat by wind power, thereby reducing the temperature in the energy storage cabinet body 1, and the other is that the fan part 122 also accelerates the evaporation speed of the cooling water, thereby further enhancing the cooling effect.

[0054] The battery energy storage cabinet of the application comprises the refrigerating device, and further comprises an explosion-proof glass 14 and a cabinet door 15.

[0055] It is worth noting that the spraying part 3 can spray the cooling water to the inner walls of the remaining sides except the second side 12, for example, the third side 13, in addition to being used to carry away heat, the cooling water can also reduce the temperature of the explosion-proof glass 14, thereby reducing the risk of explosion of the explosion-proof glass 14 due to high temperature.

[0056] In addition, the bottom of the energy storage cabinet body 1 is provided with a plurality of supports 16, which are preferably evenly distributed at the four corners of the bottom of the energy storage cabinet body 1.

[0057] The thermal conductivity of the cooling water is much higher than that of air, and can quickly carry away high-density heat, and in the case of large battery charging and discharging power and dense battery modules, the heat dissipation effect is good.

[0058] The above description of the application and its embodiments is illustrative and not limiting, and the embodiments shown in the drawings are only one of the embodiments of the application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the application, without departing from the spirit of the application, similar structural modes and embodiments can be designed without creative design, which should belong to the protection scope of the application.

Claims

1. A refrigeration device for a battery energy storage cabinet, characterized in that, It comprises: a water storage part (2); a spraying part (3) comprising a spraying pipe (31) for accessing the water storage part (2) and a spraying head (32) connected to the end of the spraying pipe (31); the spraying head (32) is used for spraying cooling water to the inner wall of the energy storage cabinet body (1) storing the battery system; a collection pipe (4) with one end penetrating through the bottom plate of the energy storage cabinet body (1) and the other end accessing the water collection tank (5) outside the energy storage cabinet body (1); the recycled water collected in the water collection tank (5) can be recycled for use in the water storage part (2) after being cooled; wherein the distance between the spraying head (32) and the top plate of the energy storage cabinet body (1) is greater than the distance between the spraying head (32) and the bottom plate of the energy storage cabinet body (1).

2. The refrigeration device for battery energy storage cabinets according to claim 1, characterized in that: It further comprises a cooling part comprising a water inlet pipe (61), a water outlet pipe (62) and a heat dissipation pipe (63) connecting the water inlet pipe (61) and the water outlet pipe (62); wherein the water inlet pipe (61) is used for accessing the water storage part (2); the recycled water flowing out of the water outlet pipe (62) flows into the water collection tank (5); the heat dissipation pipe (63) is located inside the energy storage cabinet body (1); wherein the water storage part (2) is located above the energy storage cabinet body (1).

3. The refrigeration unit for a battery energy storage cabinet of claim 2, wherein: The water storage part (2) comprises a water storage tank (21) and a water suction pump (22) placed inside the water storage tank (21), and the water inlet pipe (61) accesses the water suction pump (22).

4. The refrigeration unit for a battery energy storage cabinet of claim 1, wherein: The spraying head (32) is an arc-shaped elbow pipe, the end of which is arranged obliquely downward, and the arc-shaped elbow pipe is used for spraying cooling water to the inner wall of the first side (11) of the energy storage cabinet body (1).

5. The refrigeration unit for a battery energy storage cabinet of claim 2, wherein: The heat dissipation pipe (63) comprises a plurality of U-shaped pipes (631) arranged uniformly along the height direction of the energy storage cabinet body (1), and the two ends of each U-shaped pipe (631) are connected to the upper and lower adjacent U-shaped pipes (631) through bending parts (632), respectively.

6. The refrigeration unit for a battery energy storage cabinet of claim 5, wherein: The bending parts (632) at the two ends of each U-shaped pipe (631) are axially symmetrical relative to the central axis of the U-shaped pipe (631).

7. The refrigeration unit for a battery energy storage cabinet of claim 1, wherein: It further comprises a ventilation assembly comprising a ventilation opening (121) and a fan part (122); wherein the ventilation opening (121) is arranged on the second side (12) of the energy storage cabinet body (1); the fan part (122) is arranged in the ventilation opening (121), the fan part (122) is connected to an external power source, and the external power source is used for driving the fan part (122) to rotate.

8. A battery energy storage cabinet comprising the refrigeration apparatus of any one of claims 1 to 7, characterized in that: It comprises an explosion-proof glass (14) embedded in the through hole arranged on the third side (13) of the energy storage cabinet body (1).

9. The battery bank of claim 8, wherein: The energy storage cabinet body (1) is provided with a cabinet door (15), one side of which is connected to the first side (11) of the energy storage cabinet body (1) through a hinge.

10. The battery energy storage cabinet of claim 8, wherein: The bottom of the energy storage cabinet body (1) is provided with a plurality of supports (16), and the height of the support (16) is approximately equal to the height of the water collection tank (5).

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