Compact battery liquid refrigerator

Abstract

The interior of a cabinet body is divided into a battery bin and an electrical chamber through a partition plate, a liquid cooling water outlet pipe and a liquid cooling water return pipe are arranged on the two sides of the cabinet body, and the liquid cooling water outlet pipe is in bypass connection with a plurality of battery pack water inlet pipes so as to be connected with a water inlet connector of a liquid cooling bottom plate of a liquid cooling battery pack in a matched mode. The liquid cooling water return pipe bypasses a plurality of battery pack water outlet pipes to be connected with water outlet connectors of a liquid cooling bottom plate of the liquid cooling battery pack in a matched mode, and the liquid cooling water outlet pipes and the liquid cooling water return pipe are connected with a water outlet and a water inlet of the liquid cooling unit respectively. The liquid cooling unit, a liquid cooling water outlet pipe, a battery pack water inlet pipe, a battery pack water outlet pipe and a liquid cooling water return pipe form a refrigerating loop through a compressor, a condenser, an expansion valve and an evaporator inside the liquid cooling unit, so that the liquid cooling battery pack is cooled, liquid cooling of the cabinet body is achieved, the structure is compact, and cost is low. And a refrigerating unit does not need to be additionally arranged outside to perform liquid cooling on the battery pack, and pipelines do not need to be connected outside, so that the occupied space is greatly saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery energy storage cabinet technical field, concretely is a compact battery liquid cooling cabinet. BACKGROUND

[0002] In recent years, with the transformation of global energy structure and the rapid development of renewable energy, energy storage system as the key technology to balance power supply and demand and improve energy utilization efficiency has been widely concerned and applied. Energy storage system, especially battery energy storage system, faces multiple challenges such as energy density improvement, system scale expansion and safe and stable operation. Among them, the heat dissipation problem is particularly critical, because the battery will generate a lot of heat during charging and discharging, if it cannot be effectively dissipated in time, it will seriously affect the performance and life of the battery, and even cause safety accidents. Liquid cooling technology has obvious advantages compared with traditional air cooling technology, such as high heat dissipation efficiency, accurate temperature control and good safety, etc. However, the existing liquid cooling energy storage cabinet still has some deficiencies in design, such as complex structure, large floor area, difficult operation and maintenance, etc. These problems limit the wide application of liquid cooling technology in the field of energy storage.

[0003] The existing liquid cooling energy storage cabinet generally installs the refrigerating unit separately outside the liquid cooling energy storage cabinet, which leads to the need for customizing the rack and arranging the pipeline outside the liquid cooling energy storage cabinet, greatly improving the space occupancy rate, therefore, an improved technology is urgently needed to solve the problem existing in the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a compact battery liquid cooling cabinet, which does not need to install a refrigerating unit outside to liquid cool the battery pack, and does not need to connect the pipeline outside, greatly saving the floor space, to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a compact battery liquid cooling cabinet, including cabinet, cabinet door, roof, base, fixed plate, baffle, liquid cooling outlet pipe, liquid cooling return pipe, battery pack water inlet pipe and battery pack water outlet pipe, the positive side of cabinet is hinged with cabinet door, the top of cabinet is provided with roof, the bottom of cabinet is provided with base, both sides in the inside of cabinet are provided with fixed plate, the inside of cabinet is provided with baffle, the inside of cabinet is divided into battery compartment and electrical room through baffle, a plurality of liquid cooling battery packs are provided in the battery compartment of the inside of cabinet, both sides of liquid cooling battery pack are connected with fixed plate respectively, the liquid cooling battery pack includes battery pack main part and liquid cooling bottom plate, the bottom of battery pack main part is connected with liquid cooling bottom plate, the inside of liquid cooling bottom plate is provided with flow channel, the upper surface of the outer end of liquid cooling bottom plate is provided with water inlet and water outlet, water inlet and water outlet are connected with both ends of flow channel respectively, both sides in the inside of cabinet are provided with liquid cooling outlet pipe and liquid cooling return pipe, a plurality of battery pack water inlet pipes are bypassed to liquid cooling outlet pipe, battery pack water inlet pipe corresponds with liquid cooling battery pack and is connected with the water inlet of corresponding liquid cooling battery pack, a plurality of battery pack water outlet pipes are bypassed to liquid cooling return pipe, battery pack water outlet pipe corresponds with liquid cooling battery pack and is connected with the water outlet of corresponding liquid cooling battery pack, the bottom of the electrical room of cabinet is provided with liquid cooling unit, both sides of liquid cooling unit are provided with water inlet and water outlet respectively, liquid cooling outlet pipe is connected with the water outlet of liquid cooling unit, liquid cooling return pipe is connected with the water inlet of liquid cooling unit, the inside of liquid cooling unit is provided with compressor, condenser, expansion valve and evaporator, the compressor is connected with condenser through pipeline, the condenser is connected with expansion valve through pipeline, expansion valve is connected with the water outlet of liquid cooling unit through pipeline, the water inlet of liquid cooling unit is connected with evaporator through pipeline, evaporator is connected with compressor through pipeline.

[0006] Preferably, the utility model provides a compact battery liquid cooling cabinet, wherein the lower part of cabinet door is provided with cabinet door louver heat dissipation port.

[0007] Preferably, the utility model provides a compact battery liquid cooling cabinet, wherein the surface of base is provided with base louver heat dissipation port.

[0008] Preferably, the utility model provides a compact battery liquid cooling cabinet, wherein the inside of the electrical room of cabinet is further provided with high voltage box and energy storage converter, high voltage box and energy storage converter are connected with corresponding one side fixed plate through bolt respectively, the positive and negative poles in the inside of battery pack main part are connected with high voltage box respectively, high voltage box is further connected with energy storage converter.

[0009] Compared with the prior art, the utility model has the advantages that:

[0010] The inside of the cabinet body is separated into a battery compartment and an electrical chamber by a partition plate, liquid cooling water outlet pipes and liquid cooling water return pipes are arranged on both sides of the cabinet body, the liquid cooling water outlet pipes are bypassed by a plurality of battery pack water inlet pipes to be connected to water inlet interfaces of liquid cooling bottom plates of the liquid cooling battery packs, the liquid cooling water return pipes are bypassed by a plurality of battery pack water outlet pipes to be connected to water outlet interfaces of the liquid cooling bottom plates of the liquid cooling battery packs, and the liquid cooling water outlet pipes and the liquid cooling water return pipes are connected to water outlets and water inlets of a liquid cooling unit respectively, the inside of the liquid cooling unit forms a refrigeration circuit with the liquid cooling water outlet pipes, the battery pack water inlet pipes, the battery pack water outlet pipes and the liquid cooling water return pipes through a compressor, a condenser, an expansion valve and an evaporator, so that the liquid cooling battery packs are cooled, and the structure enables the cabinet body to be liquid cooled, is compact, does not need to additionally install a refrigeration unit outside to liquid cool the battery packs, does not need to connect pipelines outside, and greatly saves the occupied space. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a structural schematic view of the utility model;

[0012] Fig. 2 It is a structural schematic view of the liquid cooling unit;

[0013] Fig. 3 It is a schematic view of connection of the high-voltage box, the energy storage converter and the battery pack main body.

[0014] In the drawing: cabinet body 1, cabinet door 2, top plate 3, base 4, fixed plate 5, partition plate 6, liquid cooling water outlet pipe 7, liquid cooling water return pipe 8, battery pack water inlet pipe 9, battery pack water outlet pipe 10, battery compartment 11, electrical chamber 12, battery pack main body 13, liquid cooling bottom plate 14, water inlet interface 15, water outlet interface 16, liquid cooling unit 17, water inlet 18, water outlet 19, compressor 20, condenser 21, expansion valve 22, evaporator 23, cabinet door louver heat dissipation opening 24, base louver heat dissipation opening 25, high-voltage box 26, energy storage converter 27. DETAILED DESCRIPTION

[0015] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model;

[0016] It should be noted that in the description of the utility model, it should be noted that the terms "inner", "outer", "upper", "lower", "two sides", "one end", "the other end", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0017] Please refer to Figs. 1-3The utility model provides a technical scheme: a compact battery liquid cooling cabinet, including cabinet 1, cabinet door 2, top plate 3, base 4, fixed plate 5, baffle 6, liquid cooling water outlet pipe 7, liquid cooling return pipe 8, battery pack water inlet pipe 9 and battery pack water outlet pipe 10, the positive side surface hinged of cabinet 1 has cabinet door 2, the lower part of cabinet door 2 is provided with cabinet door louver heat dissipation mouth 24, pass through cabinet door louver heat dissipation mouth 24 to facilitate the circulation of air, the top end of cabinet 1 is provided with top plate 3, the bottom end of cabinet 1 is provided with base 4, the surface of base 4 is provided with base louver heat dissipation mouth 25, pass through base louver heat dissipation mouth 25 to further improve the air circulation, the both sides of inside cabinet 1 are provided with fixed plate 5, inside cabinet 1 is provided with baffle 6, inside cabinet 1 is divided into battery compartment 11 and electrical room 12 through baffle 6, the battery compartment 11 of inside cabinet 1 is provided with a plurality of liquid cooling battery packs, and the both sides of liquid cooling battery pack are connected with fixed plate 5 respectively, and liquid cooling battery pack includes battery pack main body 13 and liquid cooling bottom plate 14, and the bottom of battery pack main body 13 is connected with liquid cooling bottom plate 14, and the inside of liquid cooling bottom plate 14 is provided with flow channel, and the upper surface of the outer end of liquid cooling bottom plate 14 is provided with water inlet 15 and water outlet 16, and water inlet 15 and water outlet 16 are connected with the both ends of flow channel respectively, and the both sides of inside cabinet 1 are provided with liquid cooling water outlet pipe 7 and liquid cooling return pipe 8 respectively, and liquid cooling water outlet pipe 7 is bypassed with a plurality of battery pack water inlet pipe 9, and battery pack water inlet pipe 9 corresponds with liquid cooling battery pack one to one and is connected with the water inlet 15 of corresponding liquid cooling battery pack, and liquid cooling return pipe 8 is bypassed with a plurality of battery pack water outlet pipe 10, and battery pack water outlet pipe 10 corresponds with liquid cooling battery pack one to one and is connected with the water outlet 16 of corresponding liquid cooling battery pack, and the bottom of the electrical room 12 of cabinet 1 is provided with liquid cooling unit 17, and the both sides of liquid cooling unit 17 are provided with water inlet 18 and water outlet 19 respectively, and liquid cooling water outlet pipe 7 is connected with the water outlet 19 of liquid cooling unit 17, and liquid cooling return pipe 8 is connected with the water inlet 18 of liquid cooling unit 17, and the inside of liquid cooling unit 17 is provided with compressor 20, condenser 21, expansion valve 22 and evaporator 23, and compressor 20 is connected with condenser 21 through pipeline, and condenser 21 is connected with expansion valve 22 through pipeline, and expansion valve 22 is connected with the water outlet 19 of liquid cooling unit 17 through pipeline, and the water inlet 18 of liquid cooling unit 17 is connected with evaporator 23 through pipeline, and evaporator 23 is connected with compressor 20 through pipeline, and the inside of the electrical room 12 of cabinet 1 is further provided with high voltage box 26 and energy storage converter 27, and high voltage box 26 and energy storage converter 27 are connected with corresponding one side fixed plate 5 through bolt respectively, and the positive and negative poles of inside battery pack main body 13 are connected with high voltage box 26 respectively, and high voltage box 26 is further connected with energy storage converter 27, and high voltage box and PCS rely on cabinet door louver heat dissipation mouth 24 to take in air, and the lower part exhausts air, and liquid cooling unit 17 is provided with fan and exhausts air through air duct to the lower part, and high voltage box 26 is the intermediate unit of connecting battery cluster and energy storage converter (PCS) 27, contains battery cluster management unit, circuit breaker, contactor, current sensor and other devices, can gather the voltage and current value of battery cluster,Realize the management and protection of the whole battery system operation state.

[0018] The use method and principle are as follows: the battery pack body 13 connected with the liquid cooling bottom plate 14 is connected with the fixed plates 5 on the two sides of the cabinet body 1 through the connecting pieces on the two sides, so that the liquid cooling battery pack is installed in the battery compartment 11 of the cabinet body 1 from top to bottom. Then, the liquid cooling unit 17 is installed at the bottom end in the cabinet body 1, the high-voltage box 26 and the energy storage converter 27 are supported on the upper surface of the liquid cooling unit 17, and one side is connected with the fixed plate 5 on the corresponding side through bolts, the circuit breaker is connected with the fixed plate 5 on the other side of the cabinet body 1. Then, the water outlet 19 of the liquid cooling unit 17 is connected with the liquid cooling water outlet pipe 7, the battery pack water inlet pipe 9 bypassing the liquid cooling water outlet pipe 7 is connected with the water inlet interface 15 of the liquid cooling bottom plate 14 of the corresponding liquid cooling battery pack, the water inlet 18 of the liquid cooling unit 17 is connected with the liquid cooling water return pipe 8, and the battery pack water outlet pipe 10 bypassing the liquid cooling water return pipe 8 is connected with the water outlet interface 16 of the liquid cooling bottom plate 14 of the corresponding liquid cooling battery pack. The installation is completed. In use, the compressor 20 is started, and the refrigerant is added into the refrigeration pipeline. The refrigerant forms high-temperature gaseous refrigerant through the compressor 20, and then obtains normal-temperature liquid refrigerant through heat exchange of the condenser 21. The liquid refrigerant passes through the expansion valve 22 and enters the liquid cooling water outlet pipe 7 from the water outlet 19. Then, the liquid refrigerant enters the liquid cooling plate at the bottom of the liquid cooling battery pack from each battery pack water inlet pipe 9. The temperature of the refrigerant slightly rises through heat exchange with the battery. Then, the refrigerant enters the evaporator 23 and obtains normal-temperature gaseous refrigerant. Then, the refrigerant returns to the compressor 20 again, and the above steps are repeated, so that the cooling of the battery is realized. The cabinet body 1 is divided into the battery compartment 11 and the electrical chamber 12 by the partition plate 6, the liquid cooling water outlet pipe 7 and the liquid cooling water return pipe 8 are arranged on the two sides of the cabinet body 1, the liquid cooling water outlet pipe 7 is bypassed by a plurality of battery pack water inlet pipes 9 to be connected with the water inlet interface 15 of the liquid cooling bottom plate 14 of the liquid cooling battery pack, the liquid cooling water return pipe 8 is bypassed by a plurality of battery pack water outlet pipes 10 to be connected with the water outlet interface 16 of the liquid cooling bottom plate 14 of the liquid cooling battery pack, and the liquid cooling water outlet pipe 7 and the liquid cooling water return pipe 8 are connected with the water outlet 19 and the water inlet 18 of the liquid cooling unit 17 respectively, and the liquid cooling unit 17 is internally connected with the liquid cooling water outlet pipe 7, the battery pack water inlet pipe 9, the battery pack water outlet pipe 10 and the liquid cooling water return pipe 8 through the compressor 20, the condenser 21, the expansion valve 22 and the evaporator 23 to form a refrigeration circuit, so that the liquid cooling battery pack is cooled. The structure enables the cabinet body 1 to realize liquid cooling, is compact, does not need to additionally install a refrigeration unit outside to liquid cool the battery pack, does not need to connect pipelines outside, and greatly saves the occupied space.

[0019] The parts not described in the utility model are known to those skilled in the art.

[0020] Finally, it should be noted that the above detailed description is merely intended to illustrate the technical solutions of the present application, rather than limit the present application. Although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all of them should be included in the scope of the claims of the present application.

Claims

1. A compact battery liquid chiller characterized by: The application relates to a cabinet, which comprises a cabinet body (1), a cabinet door (2), a top plate (3), a base (4), a fixed plate (5), a partition plate (6), a liquid cooling water outlet pipe (7), a liquid cooling water return pipe (8), a battery pack water inlet pipe (9) and a battery pack water outlet pipe (10), the cabinet door (2) is hingedly connected to the front side of the cabinet body (1), the top end of the cabinet body (1) is provided with the top plate (3), the bottom end of the cabinet body (1) is provided with the base (4), the two sides of the cabinet body (1) are provided with the fixed plates (5), the cabinet body (1) is internally provided with the partition plate (6), the cabinet body (1) is internally divided into a battery compartment (11) and an electrical chamber (12) by the partition plate (6), a plurality of liquid cooling battery packs are arranged in the battery compartment (11) of the cabinet body (1), the two sides of the liquid cooling battery pack are connected with the fixed plates (5) respectively, the liquid cooling battery pack comprises a battery pack main body (13) and a liquid cooling bottom plate (14), the bottom of the battery pack main body (13) is connected with the liquid cooling bottom plate (14), the liquid cooling bottom plate (14) is internally provided with a flow channel, the outer end of the liquid cooling bottom plate (14) is provided with water inlet interfaces (15) and water outlet interfaces (16) on the upper surface, the water inlet interfaces (15) and the water outlet interfaces (16) are connected with the two ends of the flow channel respectively, the two sides of the cabinet body (1) are provided with the liquid cooling water outlet pipe (7) and the liquid cooling water return pipe (8) respectively, the liquid cooling water outlet pipe (7) is bypassed by a plurality of battery pack water inlet pipes (9), the battery pack water inlet pipes (9) correspond to the liquid cooling battery packs one by one and are connected with the water inlet interfaces (15) of the corresponding liquid cooling battery packs, the liquid cooling water return pipe (8) is bypassed by a plurality of battery pack water outlet pipes (10), the battery pack water outlet pipes (10) correspond to the liquid cooling battery packs one by one and are connected with the water outlet interfaces (16) of the corresponding liquid cooling battery packs, the bottom of the electrical chamber (12) of the cabinet body (1) is provided with a liquid cooling unit (17), the two sides of the liquid cooling unit (17) are provided with water inlets (18) and water outlets (19) respectively, the liquid cooling water outlet pipe (7) is connected with the water outlet (19) of the liquid cooling unit (17), the liquid cooling water return pipe (8) is connected with the water inlet (18) of the liquid cooling unit (17), the liquid cooling unit (17) is internally provided with a compressor (20), a condenser (21), an expansion valve (22) and an evaporator (23), the compressor (20) is connected with the condenser (21) through a pipeline, the condenser (21) is connected with the expansion valve (22) through a pipeline, the expansion valve (22) is connected with the water outlet (19) of the liquid cooling unit (17) through a pipeline, the water inlet (18) of the liquid cooling unit (17) is connected with the evaporator (23) through a pipeline, and the evaporator (23) is connected with the compressor (20) through a pipeline.

2. A compact battery liquid chiller according to claim 1, wherein: The lower part of the cabinet door (2) is provided with cabinet door louver heat dissipation openings (24).

3. A compact battery liquid chiller according to claim 1, wherein: The surface of the base (4) is provided with base louver heat dissipation openings (25).

4. A compact battery liquid chiller according to claim 1, wherein: The electrical chamber (12) of the cabinet body (1) is internally provided with a high-voltage box (26) and an energy storage converter (27), the high-voltage box (26) and the energy storage converter (27) are connected with the fixing plate (5) on the corresponding side through bolts, the positive and negative poles of the battery pack body (13) are connected with the high-voltage box (26) respectively, and the high-voltage box (26) is also connected with the energy storage converter (27).

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