Liquid cooling energy storage cabinet

Abstract

The invention discloses a liquid cooling energy storage cabinet which comprises a cabinet body, a battery cabin and an electrical cabin are arranged in the cabinet body, and the electrical cabin and the battery cabin are spaced left and right in the vertical direction. The electrical cabin comprises a control cabin, a liquid cooling cabin, a converter cabin and a transformer cabin, the transformer cabin is arranged on the upper side of the liquid cooling cabin, and the converter cabin is arranged on the upper side of the control cabin. The liquid cooling device has the beneficial effects that when the battery pack is disassembled, the first liquid cooling pipeline on the battery pack can be conveniently separated from the whole liquid cooling device, and the first stop valve can be closed, so that other battery packs can normally use the refrigeration effect, and the capacity increasing and the capacity reduction of the battery are effectively facilitated; and the battery pack can be correspondingly replaced and plugged during capacity increasing and decreasing disassembly.

Description

Technical Field

[0001] The present invention relates to the field of energy storage cabinets, and in particular to a liquid-cooled energy storage cabinet. Background Art

[0002] Industrial and commercial application scenarios in the field of energy storage are becoming more and more common. Compared with container energy storage systems, energy storage cabinets with smaller size and more flexible layout have been widely used. Energy storage cabinets are mainly divided into two categories: air-cooled energy storage cabinets and liquid-cooled energy storage cabinets. Energy storage cabinets are mainly divided into battery compartments and electrical compartments. The battery compartment has built-in air-cooled or liquid-cooled battery plug-ins, and the electrical compartment is equipped with liquid cooling units, fire-fighting equipment, and corresponding AC and DC electrical components to form a complete energy storage cabinet system.

[0003] When the current energy storage cabinet is in use, a detachable battery pack is used to increase or decrease the capacity of the energy storage cabinet. However, when the energy storage cabinet uses refrigeration equipment, it is usually an integrated liquid cooling system for all battery packs. When the number of battery packs changes, it is easy to cause redundant cooling of the vacant positions of the battery packs. In addition, additional cooling equipment is currently required for cooling the energy storage inverter and transformer, which has high energy consumption and cost. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to solve the problems in the prior art that when the number of battery packs changes, the vacant positions of the battery packs are easily cooled redundantly, and additional cooling equipment is required for cooling the energy storage inverter and transformer device, resulting in high energy consumption and cost. A liquid-cooled energy storage cabinet is provided to adjust the liquid cooling range according to the number of battery packs.

[0005] Technical solution:

[0006] The present application proposes a liquid-cooled energy storage cabinet, comprising a cabinet body, wherein a battery compartment and an electrical compartment are arranged in the cabinet body, and the electrical compartment and the battery compartment are spaced apart from each other in the left and right directions in the vertical direction; the electrical compartment comprises a control compartment, a liquid cooling compartment, a converter compartment, and a transformer compartment, wherein the transformer compartment is arranged on the upper side of the liquid cooling compartment, and the converter compartment is arranged on the upper side of the control compartment; N battery units are arranged in the battery compartment; the control compartment is provided with a control unit, a liquid cooling device is arranged in the liquid cooling compartment, an energy storage converter is arranged in the converter compartment, and a transformer device is arranged in the transformer compartment;

[0007] The coolant flows out of the liquid cooling device and enters the liquid outlet pipeline. The liquid outlet pipeline, N battery cells, and the return pipeline are connected in series, wherein the coolant channels inside the N battery cells are connected in parallel with each other. After flowing through the return pipeline, the coolant flows through the energy storage inverter and the transformer device connected in parallel, and then is collected and finally returns to the liquid cooling device to complete a cooling cycle.

[0008] The liquid cooling device also includes a first liquid cooling connector and a first stop valve;

[0009] The liquid cooler is arranged inside the cabinet, and a first liquid cooling pipeline is arranged in the battery unit. The first liquid cooling pipeline is provided with a liquid inlet end and a liquid outlet end. The liquid inlet end of the liquid cooler is connected with a return pipeline, and the liquid outlet end of the liquid cooler is connected with the liquid outlet pipeline. N first stop valves are respectively arranged on the liquid outlet pipeline and the return pipeline, and are detachably connected to the liquid inlet end and the liquid outlet end of the first liquid cooling pipeline through branch pipes and first liquid cooling connectors.

[0010] As a further preferred embodiment, the liquid-cooled energy storage cabinet also includes a fire-fighting device, which includes a fire-fighting pipeline and a fire-extinguishing storage device. The discharge port of the fire-fighting storage device is connected to the fire-fighting pipeline, and the fire-fighting pipeline is connected to the fire-fighting branch pipe through N second stop valves respectively. The battery unit is provided with a composite detector, a puncture valve, and a nozzle, and both ends of the puncture valve are connected to the nozzle and are detachably connected to the fire-fighting branch pipe.

[0011] As a further preference, the energy storage converter and the transformer are both provided with a second liquid cooling pipeline, and the reflux pipeline is connected to the liquid inlet and liquid outlet of the second liquid cooling pipeline through a second liquid cooling joint and a branch pipeline respectively.

[0012] As a further preferred embodiment, the liquid cooling compartment is sealed and separated from the control compartment, the converter compartment and the transformer compartment by partitions.

[0013] As a further preference, an automatic exhaust valve is provided on the second liquid cooling joint connected to the energy storage converter.

[0014] As a further preference, a throttle valve is provided on the return pipeline.

[0015] As further preferred, at least two battery packs form a battery unit.

[0016] As a further preference, a visual window is provided on the cabinet.

[0017] As a further preference, the energy storage converter and the voltage transformation device are higher than the liquid cooler.

[0018] Beneficial effects: When the battery pack is removed, the first liquid cooling pipe on the battery pack can be conveniently separated from the entire liquid cooling device, and the first stop valve can be closed to allow other battery packs to use the cooling effect normally, which effectively facilitates battery capacity increase and reduction. When the battery pack is disassembled for capacity increase and reduction, corresponding replacement and blocking can be performed;

[0019] Whenever the battery capacity is increased or decreased, the appropriate flow rate can be effectively controlled through the throttle valve and liquid cooling device to divert and control the flow in the pipeline, ensuring the thermal management performance of the entire system and strong adaptability;

[0020] When the capacity of the battery pack is increased or decreased by the fire-fighting device, the puncture valve and nozzle on the battery pack can be effectively opened or closed through the second stop valve, and the battery pack can be replaced or blocked accordingly when the capacity is increased or decreased and the battery pack is disassembled;

[0021] When cooling the energy storage inverter and transformer, only the cooling water after cooling the battery pack is needed to cool the energy storage inverter and transformer. No additional cooling equipment is required, which greatly saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the present invention from one viewing angle;

[0023] Figure 2 It is a schematic diagram of the three-dimensional viewing angle structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the liquid cooling device of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the fire fighting device of the present invention;

[0026] Figure 5 It is a schematic cross-sectional view of the fire fighting device of the present invention;

[0027] Figure 6 For the present invention Figure 3 A schematic diagram of the enlarged structure of the middle A position;

[0028] Figure 7 For the present invention Figure 4 Schematic diagram of the enlarged structure at position B in the middle.

[0029] Reference numerals:

[0030] 1. Cabinet; 2. Energy storage converter; 3. Transformer; 4. Battery unit; 5. Liquid cooling device; 6. Liquid cooler; 7. Liquid outlet pipeline; 8. Return pipeline; 9. First stop valve; 10. Branch pipeline; 11. Fire-fighting device; 12. Fire-fighting pipeline; 13. Fire-fighting storage equipment; 14. Fire-fighting branch; 15. Second stop valve; 16. Composite detector; 17. Piercing valve; 18. Nozzle; 19. First liquid cooling connector; 20. Second liquid cooling connector; 21. Control cabin; 22. Liquid cooling cabin; 23. Automatic exhaust valve; 24. Converter cabin; 25. Transformer cabin; 26. Battery cabin; 27. Control unit; 28. Partition; 29. ​​Throttle valve; 30. Visual window. DETAILED DESCRIPTION

[0031] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the specific embodiments of the accompanying drawings.

[0032] Example 1

[0033] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0034] In view of the problems existing in the existing technology, such as Figure 1-7 As shown, a liquid-cooled energy storage cabinet comprises a cabinet body 1, wherein a battery compartment 26 and an electrical compartment are arranged in the cabinet body 1, and the electrical compartment and the battery compartment 26 are spaced apart from each other in the left and right directions in the vertical direction; the electrical compartment comprises a control compartment 21, a liquid cooling compartment 22, a converter compartment 24, and a transformer compartment 25, wherein the transformer compartment 25 is arranged on the upper side of the liquid cooling compartment 22, and the converter compartment 24 is arranged on the upper side of the control compartment 21; N battery units 4 are arranged in the battery compartment 26; the control compartment 21 is provided with a control unit 27, a liquid cooling device 5 is arranged in the liquid cooling compartment 22, an energy storage converter 2 is arranged in the converter compartment 24, and a transformer device 3 is arranged in the transformer compartment 25;

[0035] The coolant flows out of the liquid cooling device 5 and enters the liquid outlet pipeline 7. The liquid outlet pipeline 7, N battery cells 4, and the return pipeline 8 are connected in series, wherein the coolant channels inside the N battery cells 4 are connected in parallel with each other. After flowing through the return pipeline 8, the coolant flows through the energy storage inverter 2 and the transformer device 3 connected in parallel, and then is collected and finally returns to the liquid cooling device 5, completing a cooling cycle.

[0036] As a further preferred embodiment, the liquid cooling device 5 further includes a first liquid cooling connector 19 and a first stop valve 9;

[0037] The liquid cooler 6 is arranged inside the cabinet 1, and a first liquid cooling pipeline is arranged in the battery unit 4. The first liquid cooling pipeline is provided with a liquid inlet end and a liquid outlet end. The liquid inlet end of the liquid cooler 6 is connected with a return pipeline 8, and the liquid outlet end of the liquid cooler 6 is connected with a liquid outlet pipeline 7. N first stop valves 9 are respectively arranged on the liquid outlet pipeline 7 and the return pipeline 8, which are detachably connected to the liquid inlet end and the liquid outlet end of the first liquid cooling pipeline through a branch pipe 10 and a first liquid cooling connector 19.

[0038] Specifically, whenever the battery cell 4 is disassembled, the first stop valve 9 is closed, so that the battery cell 4 can be easily disassembled through the first liquid cooling connector 19, and other undisassembled battery cells 4 can continue to be used normally. Whenever the capacity is increased (adding battery cells), the first liquid cooling connector 19 is connected to the liquid inlet and outlet on the battery cell 4, and the corresponding first stop valve 9 is opened, so as to facilitate the cooling and cooling effect of the increased battery.

[0039] As a further preferred embodiment, the liquid-cooled energy storage cabinet also includes a fire-fighting device 11, which includes a fire-fighting pipeline 12 and a fire-extinguishing storage device 13. The discharge port of the fire-fighting storage device 13 is connected to the fire-fighting pipeline, and the fire-fighting pipeline is connected to the fire-fighting branch pipe through N second stop valves 15 respectively. The battery unit 4 is provided with a composite detector 16, a puncture valve 17, and a nozzle 18. Both ends of the puncture valve 17 are connected to the nozzle 18 and are detachably connected to the fire-fighting branch pipe 14.

[0040] Specifically, when the battery unit is disassembled, the second stop valve 15 is closed, and the fire branch pipe 14 and the puncture valve 17 are separated to facilitate the removal of the battery unit. When the battery unit is installed, the fire branch pipe 14 and the puncture valve 17 are connected. A control component is provided inside the battery unit 4, which is electrically connected to the composite detector 16 and the puncture valve 17 respectively. When gas or smoke is generated inside the battery unit 4 and detected by the composite detector 16, the generated electrical signal is sent to the control component to open the puncture valve 17, and then the fire extinguishing material in the fire extinguishing storage device 13 is sprayed onto the battery unit through the fire pipeline 12, the second stop valve 15, the fire branch pipe 14, and the puncture valve 17 at the nozzle 18 to extinguish the fire, thereby achieving the effect of fire fighting;

[0041] The fire extinguishing storage device 13 is an existing device, which provides a certain pressure for the externally stored fire extinguishing fuel, and is similar in function to a fire extinguisher. In specific implementation, it can be a high-pressure tank or a pump body to extract external fire extinguishing materials.

[0042] As a further preferred embodiment, the energy storage converter 2 and the transformer 3 are both provided with a second liquid cooling pipeline, and the return pipeline 8 is connected to the liquid inlet and outlet of the second liquid cooling pipeline through the second liquid cooling joint 20 and the branch pipeline respectively.

[0043] Specifically, the energy storage converter 2 and the transformer 3 can be cooled by liquid cooling;

[0044] The entire liquid-cooled energy storage cabinet is vertically divided into three space boxes on the left, middle and right. The box on the right is the energy storage battery plug-in box (battery compartment 26), which almost occupies half of the space of the entire liquid-cooled energy storage cabinet; then the left and middle are divided into two upper and lower boxes (electrical compartments), which are divided into the upper left (transformer compartment 25), the lower left (liquid cooling compartment 22), the upper middle (converter compartment 24) and the lower middle box (control compartment 21). The upper left is placed including the transformer device 3, the lower left is placed including the liquid cooling device 5, the upper middle is placed in the energy storage converter 2, and the lower middle is placed in the control unit 27. All of the above boxes are divided from each other.

[0045] As a further preferred embodiment, the liquid cooling cabin 22 is sealed and separated from the control cabin 21 , the converter cabin 24 , and the transformer cabin 25 by a partition 28 .

[0046] As a further preferred embodiment, the energy storage converter 2 and the transformer device 3 are higher than the liquid cooler 6 .

[0047] Specifically, the liquid cooling chamber 22 is sealed to a certain extent, and the energy storage converter 2 and the transformer 3 are higher than the liquid cooling machine 6, so as to reduce the risk of short circuit of other components caused by the liquid generated when the liquid cooling device 5 in the liquid cooling chamber 22 leaks.

[0048] The liquid cooler 6 cools the entire liquid-cooled energy storage cabinet, and the core cooling components include the battery unit 4, the energy storage converter 2 and the transformer 3.

[0049] After the coolant comes out of the battery cell 4, it is divided through the three-way valve (the second liquid cooling joint 20), one part flows through the energy storage inverter 2, and the other part flows through the transformer 3. These two parts are equivalent to a parallel effect in the coolant, and the two are connected in series with the battery cell 4 at the same time. In specific implementation, after the coolant coming out of the liquid cooler 6 is cooled by different battery cells 4 respectively, the coolant absorbs the heat generated by the battery cell 4, so that the temperature of the coolant is increased (specifically to about 40 degrees Celsius), but the coolant temperature at this time is still much lower than the temperature of the energy storage inverter 2 and the transformer 3. Therefore, the energy storage inverter 2 and the transformer 3 can continue to be cooled, and there is no need to add additional refrigeration equipment for the energy storage inverter 2 and the transformer 3, which greatly reduces energy consumption and cost.

[0050] As a further preferred embodiment, a throttle valve 29 is provided on the return line 8 .

[0051] Specifically, because the flow rate of the coolant output by the liquid cooler 6 does not change, each time the battery unit 4 is increased or decreased, the flow rate in the loop pipe 8 and the energy storage converter 2 and the transformer 3 will change, thereby causing the cooling effect of the energy storage converter 2 and the transformer 3 to change, affecting the cooling effect. When the battery unit 4 is reduced, the flow rate of the coolant in the loop pipe 8 and the energy storage converter 2 and the transformer 3 may increase, so the throttle valve 29 is rotated to increase the flow rate through the throttle valve 29, so as to share more of the flow through the storage The cooling liquid of the energy storage inverter 2 and the transformer device 3 is prevented from damaging the internal pipes of the energy storage inverter 2 and the transformer device 3 due to excessive flow. When the number of battery cells 4 is increased, the flow through the loop pipe 8 and the energy storage inverter 2 and the transformer device 3 becomes smaller. By rotating the throttle valve 29, the flow through the throttle valve 29 becomes smaller, and the flow of the cooling liquid flowing through the energy storage inverter 2 and the transformer device 3 is increased, so that more cooling liquid passes through the energy storage inverter 2 and the transformer device 3 to maintain the cooling effect of the energy storage inverter 2 and the transformer device 3.

[0052] As a further preferred embodiment, an automatic exhaust valve 23 is provided on the second liquid cooling joint 20 connected to the energy storage converter 2 .

[0053] Specifically, when gas is generated in the loop pipeline 8, it is discharged to a certain extent to improve the cooling effect.

[0054] As a further preferred embodiment, a battery unit 4 is composed of at least two battery packs.

[0055] Specifically, two battery packs are used to form a battery unit 4, which facilitates modular addition and subtraction of batteries.

[0056] As a further preferred embodiment, a viewing window 30 is provided on the cabinet body 1 .

[0057] Specifically, it is convenient to observe the situation inside the cabinet 1 to a certain extent.

[0058] The above is only a specific implementation of the embodiment of the present invention, but the protection scope of the embodiment of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiment of the present invention should be included in the protection scope of the embodiment of the present invention. Therefore, the protection scope of the embodiment of the present invention should be based on the protection scope of the claims.

Claims

1. A liquid-cooled energy storage cabinet, comprising a cabinet body (1); a battery compartment (26) and an electrical compartment are arranged in the cabinet body (1); the electrical compartment and the battery compartment (26) are spaced apart from each other in the left and right directions in the vertical direction; the electrical compartment comprises a control compartment (21), a liquid-cooling compartment (22), a converter compartment (24), and a transformer compartment (25); the transformer compartment (25) is arranged on the upper side of the liquid-cooling compartment (22); the converter compartment (24) is arranged on the upper side of the control compartment (21); N battery units (4) are arranged in the battery compartment (26); the control compartment (21) is provided with a control unit (27); a liquid-cooling device (5) is arranged in the liquid-cooling compartment (22); an energy storage converter (2) is arranged in the converter compartment (24); and a transformer device (3) is arranged in the transformer compartment (25); The coolant flows out of the liquid cooling device (5) and enters the liquid outlet pipeline (7); the liquid outlet pipeline (7), N battery units (4), and the return pipeline (8) are connected in series, wherein the coolant channels inside the N battery units (4) are connected in parallel with each other; the coolant flows through the return pipeline (8) and then flows through the energy storage converter (2) and the transformer (3) connected in parallel, and then is collected and finally returns to the liquid cooling device (5), completing a cooling cycle.

2. The energy storage cabinet according to claim 1, characterized in that: The liquid cooling device (5) further comprises a first liquid cooling connector (19) and a first stop valve (9); The liquid cooling machine (6) is arranged inside the cabinet (1); a first liquid cooling pipeline is arranged inside the battery unit (4); the first liquid cooling pipeline is provided with a liquid inlet end and a liquid outlet end; the liquid inlet end of the liquid cooling machine (6) is connected to a return pipeline (8); the liquid outlet end of the liquid cooling machine (6) is connected to a liquid outlet pipeline (7); the liquid outlet pipeline (7) and the return pipeline (8) are respectively provided with N first stop valves (9) which are detachably connected to the liquid inlet end and the liquid outlet end of the first liquid cooling pipeline through a branch pipeline (10) and a first liquid cooling connector (19).

3. The energy storage cabinet according to claim 1, characterized in that: The liquid-cooled energy storage cabinet further comprises a fire-fighting device (11), the fire-fighting device (11) comprising a fire-fighting pipeline (12) and a fire-extinguishing storage device (13), the discharge port of the fire-fighting storage device (13) being in communication with the fire-fighting pipeline (12), the fire-fighting pipeline (12) being in communication with the fire-fighting branch pipe (14) respectively through N second stop valves (15), the battery unit (4) being provided with a composite detector (16), a puncture valve (17), and a nozzle (18), the two ends of the puncture valve (17) being in communication with the nozzle (18) and being detachably connected with the fire-fighting branch pipe (14).

4. The energy storage cabinet according to claim 2, characterized in that: The energy storage converter (2) and the transformer (3) are both provided with a second liquid cooling pipeline, and the return pipeline (8) is connected to the liquid inlet and liquid outlet of the second liquid cooling pipeline through a second liquid cooling joint (20) and a branch pipeline.

5. The energy storage cabinet according to claim 2, characterized in that: The liquid cooling chamber (22) is sealed and separated from the control chamber (21), the converter chamber (24), and the transformer chamber (25) by a partition plate (28).

6. The energy storage cabinet according to claim 3, characterized in that: An automatic exhaust valve (23) is provided on the second liquid cooling joint (20) which is in communication with the energy storage converter (2) (2).

7. The energy storage cabinet according to claim 1, characterized in that: The return line (8) is provided with a throttle valve (29).

8. The energy storage cabinet according to claim 1, characterized in that: A battery unit (4) is formed by at least two battery packs.

9. The energy storage cabinet according to claim 1, characterized in that: The cabinet (1) is provided with a viewing window (30).

10. The energy storage cabinet according to claim 1, characterized in that: The energy storage converter (2) (2) and the voltage conversion device (3) are higher than the liquid cooling machine (6).

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