Direct cooling device of air cooling battery system

Abstract

The utility model discloses a direct cooling device of an air-cooled battery system, which relates to the technical field of battery refrigeration and comprises a battery compartment and a direct cooling device, and the direct cooling device comprises an external compartment device arranged outside the battery compartment and an internal compartment device arranged inside the battery compartment; and a battery subrack cooling system for cooling the battery is placed in the battery compartment. The in-bin device comprises a copper pipe system bypassing the battery subrack cooling system, and two ends of the copper pipe system extend out of the battery bin and are connected with two ends of the out-bin device. According to the utility model, the design is reasonable, the size of an air-cooled heat dissipation system is reduced while the temperature of the battery cell is balanced, more space is provided for complete machine equipment, and the design of a complete machine air duct and the temperature management of a battery cluster-level system are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, and more specifically to the field of direct cooling device technology for air-cooled battery systems. Background Technology

[0002] Existing patents disclose technologies related to battery pack air-cooling systems, specifically as follows: Patent CN106910962A, entitled "Battery Pack Air-Cooling System," discloses the following: A battery pack air-cooling system includes a fan, an air guide shroud, a main air duct, multiple branch air ducts, multiple sleeves, multiple airflow control valves, multiple battery modules, multiple temperature acquisition elements, and a control unit; the fan generates airflow, and the air guide shroud, main air duct, and multiple branch air ducts form a connected airflow channel; each branch air duct is fixedly connected to the main air duct via a sleeve, and an airflow control valve is fixedly installed at one end of each branch air duct near the main air duct; each branch air duct extends into the interior of a corresponding battery module and has multiple pairs of air outlets; each temperature acquisition element can feed back the actual temperature inside the corresponding battery module to the control unit, and the control unit controls the airflow speed in the corresponding branch air duct by adjusting a corresponding airflow control valve.

[0003] In addition, the air-cooling system of the battery system of the current integrated energy storage unit mainly uses an integrated air conditioner. The integrated air-cooling system has the advantages of simple structure, easy maintenance and low cost. However, the integrated core components are more numerous, resulting in higher air conditioner noise and difficulty in weight reduction. It is also inconvenient for structural layout and air duct design. The air-cooling effect is affected by factors such as ambient temperature, air circulation and air duct design. Its heat dissipation efficiency and temperature uniformity are poor, which can easily cause uneven temperature in the cell, resulting in large temperature differences between cells.

[0004] The air-cooled heat dissipation system of the aforementioned all-in-one machine battery system has poor heat dissipation effect, so it is necessary to increase the number of heat sinks or increase the fan speed to improve the heat dissipation effect, thereby increasing energy consumption, design and maintenance costs. Utility Model Content

[0005] The purpose of this invention is to solve the aforementioned technical problems by providing a direct cooling device for an air-cooled battery system. This device balances the cell temperature between battery clusters while reducing the size of the air-cooling system, providing more space for the entire device, facilitating the design of the overall airflow path, and enabling temperature management of the battery cluster-level system.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] This utility model provides a direct cooling device for an air-cooled battery system, including a battery compartment and a direct cooling device. The direct cooling device includes an external device disposed outside the battery compartment and an internal device disposed inside the battery compartment. A battery pack cooling system for cooling the battery is placed inside the battery compartment.

[0008] The internal device includes a copper pipe system that bypasses the battery compartment cooling system, with both ends of the copper pipe system extending out of the battery compartment and connecting to the two ends of the external device.

[0009] In one embodiment, the battery compartment includes a battery compartment cabinet, a battery rack disposed within the battery compartment cabinet, and a plurality of battery supports mounted side by side on the battery rack from top to bottom. The battery pack cooling system includes a plurality of battery packs mounted side by side on each battery support and a battery pack fan mounted on each battery pack.

[0010] In one embodiment, the external device includes an evaporator manifold, a compressor, a condenser, a dryer, a cooling fan, and a condenser manifold. The evaporator manifold, compressor, condenser, dryer, and condenser manifold are connected in one assembly. The cooling fan is located below and outside the condenser. The evaporator manifold and the condenser manifold are respectively connected to both ends of the copper pipe system.

[0011] In one embodiment, the copper tube system is equipped with an electronic expansion valve, a thermometer, and a pressure gauge.

[0012] In one embodiment, the battery compartment cooling system includes two battery compartments mounted horizontally side-by-side on each battery bracket, with all battery compartments divided into left and right battery compartment systems.

[0013] In one embodiment, the copper pipe system includes a first evaporating copper pipe and a second evaporating copper pipe for cooling two sets of battery pack systems respectively. The medium inlets of the first evaporating copper pipe and the second evaporating copper pipe extend out of the battery compartment cabinet and are respectively connected to two interfaces of the condensation manifold. The medium outlets of the first evaporating copper pipe and the second evaporating copper pipe extend out of the battery compartment cabinet and are respectively connected to two interfaces of the evaporating manifold.

[0014] In this example, two evaporation copper tubes are used as an illustration based on the configuration of two battery clusters. One tube is arranged on the front of the first battery cluster rack, and the other tube is arranged on the front of the second battery cluster rack.

[0015] In one embodiment, the electronic expansion valve is divided into a first electronic expansion valve and a second electronic expansion valve; the thermometer is divided into a first thermometer and a second thermometer; and the pressure gauge is divided into a first pressure gauge and a second pressure gauge.

[0016] The first electronic expansion valve, the first thermometer, and the first pressure gauge are all installed on the first evaporating copper tube; the second electronic expansion valve, the second thermometer, and the second pressure gauge are all installed on the second evaporating copper tube.

[0017] In one embodiment, a partition is also included. The partition is horizontally arranged and divides the battery compartment cabinet into an upper cavity and a lower cavity, with the battery rack installed in the lower cavity. A cooling fan is installed in the upper cavity. Several ventilation holes are evenly distributed on the partition.

[0018] Working principle:

[0019] The compressor transforms the low-pressure, low-temperature gas evaporated in the evaporating copper tubes into a high-pressure, high-temperature gas. After passing through the condenser, the high-pressure, high-temperature gaseous refrigerant releases heat and condenses into a high-pressure, low-temperature liquid refrigerant. After passing through the dryer and the condenser branch pipe, it becomes two parallel branches. The high-pressure, low-temperature refrigerant is throttled by the first electronic expansion valve and the second electronic expansion valve, respectively, and becomes a low-pressure, low-temperature liquid refrigerant, which then enters the first evaporating copper tube and the second evaporating copper tube.

[0020] The cooling fan releases the heat generated by the gaseous refrigerant through the openings in the battery compartment and the heat dissipation system partition, allowing it to circulate and release into the environment. The first and second thermometers are used to detect the temperature of the first evaporating copper tube and the outlet, respectively, and the internal heat dissipation of the battery system is confirmed based on the temperature difference at the outlet. The first and second pressure gauges are used to detect the pressure at the outlets of the first and second electronic expansion valves, respectively. The superheat signal is collected by pressure and temperature, and feedback regulation is used to control the opening degree of the first and second electronic expansion valves.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. This utility model has a reasonable design. While balancing the cell temperature between clusters, it reduces the size of the air-cooling heat dissipation system, providing more space for the whole machine and facilitating the design of the whole machine's air duct and temperature management of the battery cluster-level system.

[0023] 2. A thermometer is placed in the refrigerant of the evaporating copper tube to collect the superheat signal. The pressure collected by this pressure gauge and the temperature collected by the thermometer are used to adjust the opening of the electronic expansion valve, thereby controlling the superheat of the corresponding evaporating branch and achieving a good cooling and temperature uniformity effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 yes Figure 1 Side view;

[0027] Reference numerals: 1-Dryer, 2-Condensing manifold, 3-First electronic expansion valve, 4-First pressure gauge, 5-Cooling fan, 6-First evaporating copper tube, 7-Second evaporating copper tube, 8-Battery bracket, 9-Battery insertion box fan, 10-Battery compartment cabinet, 11-Battery insertion box, 12-Condenser cooling fan, 13-Condenser, 14-Compressor, 15-Evaporating manifold, 16-First thermometer, 17-Second thermometer, 18-Battery rack, 19-Second electronic expansion valve, 20-Second pressure gauge, 21-Baffle. Detailed Implementation

[0028] To make the technical problems, technical solutions, and technical effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Example 1

[0033] like Figure 1As shown, this embodiment provides a direct cooling device for an air-cooled battery system, including a battery compartment and a direct cooling device. The direct cooling device includes an external device disposed outside the battery compartment and an internal device disposed inside the battery compartment. A battery pack cooling system for cooling the battery is placed inside the battery compartment.

[0034] The internal device includes a copper pipe system that bypasses the battery compartment cooling system, with both ends of the copper pipe system extending out of the battery compartment and connecting to the two ends of the external device.

[0035] Example 2

[0036] like Figures 1 to 2 As shown, this embodiment provides a direct cooling device for an air-cooled battery system, including a battery compartment and a direct cooling device. The direct cooling device includes an external device disposed outside the battery compartment and an internal device disposed inside the battery compartment. A battery pack cooling system for cooling the battery is placed inside the battery compartment.

[0037] The internal device includes a copper pipe system that bypasses the battery compartment cooling system, with both ends of the copper pipe system extending out of the battery compartment and connecting to the two ends of the external device.

[0038] The battery compartment includes a battery compartment cabinet 10, a battery rack 18 disposed within the battery compartment cabinet 10, and multiple battery brackets 8 mounted side by side from top to bottom on the battery rack 18. The battery box cooling system includes multiple battery boxes 11 mounted horizontally on each battery bracket 8 and battery box fans 9 mounted on each battery box 11.

[0039] The external equipment includes an evaporator manifold 15, a compressor 14, a condenser 13, a dryer 1, a condenser cooling fan 12, and a condenser manifold 2. The evaporator manifold 15, the compressor 14, the condenser 13, the dryer 1, and the condenser manifold 2 are connected in one step. The condenser cooling fan 12 is located below and outside the condenser 13. The evaporator manifold 15 and the condenser manifold 2 are respectively connected to both ends of the copper pipe system.

[0040] The copper tube system is equipped with an electronic expansion valve, thermometer, and pressure gauge.

[0041] Example 3

[0042] This embodiment is a further optimization based on embodiment 2, specifically:

[0043] The battery compartment cooling system includes two battery compartments 11 horizontally mounted on each battery bracket 8, and all battery compartments 11 are divided into left and right battery compartment systems.

[0044] The copper pipe system includes a first evaporating copper pipe 6 and a second evaporating copper pipe 7, which are used to cool two sets of battery pack systems. The medium inlets of the first evaporating copper pipe 6 and the second evaporating copper pipe 7 extend out of the battery compartment cabinet 10 and are respectively connected to two interfaces of the condensing branch pipe 2. The medium outlets of the first evaporating copper pipe 6 and the second evaporating copper pipe 7 extend out of the battery compartment cabinet 10 and are respectively connected to two interfaces of the evaporating branch pipe 15.

[0045] In this example, two evaporation copper tubes are used as an illustration based on the configuration of two battery clusters. One tube is arranged on the front of the first battery cluster rack, and the other tube is arranged on the front of the second battery cluster rack.

[0046] Example 4

[0047] This embodiment is a further optimization based on embodiment 3, specifically:

[0048] The electronic expansion valve is divided into a first electronic expansion valve 3 and a second electronic expansion valve 19.

[0049] The thermometer is divided into a first thermometer 16 and a second thermometer 17;

[0050] The pressure gauge is divided into a first pressure gauge 4 and a second pressure gauge 20.

[0051] The first electronic expansion valve 3, the first thermometer 16, and the first pressure gauge 4 are all installed on the first evaporation copper tube 6; the second electronic expansion valve 19, the second thermometer 17, and the second pressure gauge 20 are all installed on the second evaporation copper tube 7.

[0052] It also includes a partition 21, which is horizontally arranged and divides the battery compartment cabinet 10 into an upper cavity and a lower cavity, with the battery rack 18 installed in the lower cavity.

[0053] A cooling fan 5 is installed inside the upper cavity. Several cooling holes are evenly distributed on the partition plate 21.

[0054] Working principle:

[0055] The compressor 14 transforms the low-pressure, low-temperature gas evaporated by the evaporating copper tube into a high-pressure, high-temperature gas. After passing through the condenser 13, the high-pressure, high-temperature gaseous refrigerant releases heat and condenses into a high-pressure, low-temperature liquid refrigerant. After passing through the dryer 1 and the condenser branch pipe 2, it becomes two parallel branches. The high-pressure, low-temperature refrigerant is throttled by the first electronic expansion valve 3 and the second electronic expansion valve 19, respectively, and becomes a low-pressure, low-temperature liquid refrigerant, which enters the first evaporating copper tube 6 and the second evaporating copper tube 7, respectively.

[0056] The condenser cooling fan 12 releases the heat generated by the gaseous refrigerant through the openings on the battery compartment and the heat dissipation system partition 21 into the external circulation environment; the first temperature gauge 16 and the second temperature gauge 17 are used to detect the temperature of the first evaporation copper tube 6 and the outlet, respectively, and the internal heat dissipation of the battery system is confirmed based on the temperature difference at the outlet; the first pressure gauge 4 and the second pressure gauge 20 are used to detect the pressure at the outlet of the first electronic expansion valve 3 and the second electronic expansion valve 19, respectively, and the superheat signal is collected by pressure and temperature, and the opening degree of the first electronic expansion valve 3 and the second electronic expansion valve 19 is controlled by feedback regulation.

[0057] In this scheme, a thermometer is placed in the refrigerant of the evaporating copper tube to collect the superheat signal. The opening of the electronic expansion valve is adjusted by the pressure collected by the pressure gauge and the temperature collected by the thermometer, so as to control the superheat of the corresponding evaporating branch and achieve a good cooling temperature uniformity effect.

Claims

1. A direct cooling device for a forced air battery system, comprising: The battery compartment and the direct cooling device, the direct cooling device includes the compartment outside device arranged outside the battery compartment and the compartment inside device arranged inside the battery compartment; the battery compartment is placed with the battery plug-in box cooling system for cooling the battery; The compartment inside device includes the copper pipe system bypassing the battery plug-in box cooling system, both ends of the copper pipe system extend out of the battery compartment and connect with both ends of the compartment outside device.

2. A direct cooling device for a forced air battery system according to claim 1, wherein The battery compartment includes the battery compartment cabinet (10), the battery rack (18) arranged in the battery compartment cabinet (10), and a plurality of battery supports (8) installed side by side from top to bottom on the battery rack (18), the battery plug-in box cooling system includes a plurality of battery plug-in boxes (11) horizontally installed side by side on each battery support (8), and a battery plug-in box fan (9) installed on each battery plug-in box (11).

3. A direct cooling device for a forced air battery system according to claim 2, wherein The compartment outside device includes an evaporation branch pipe (15), a compressor (14), a condenser (13), a dryer (1), a condenser cooling fan (12), and a condensing branch pipe (2), the evaporation branch pipe (15), the compressor (14), the condenser (13), the dryer (1), and the condensing branch pipe (2) are connected at one time, the condenser cooling fan (12) is located outside and below the condenser (13), the evaporation branch pipe (15) and the condensing branch pipe (2) are connected with both ends of the copper pipe system respectively, and the condenser cooling fan (12).

4. A direct cooling device for a forced air battery system according to claim 3, wherein The copper pipe system is provided with an electronic expansion valve, a thermometer, and a pressure gauge.

5. A direct cooling device for a forced air battery system according to claim 4, wherein The battery plug-in box cooling system includes two battery plug-in boxes (11) horizontally installed side by side on each battery support (8), and all the battery plug-in boxes (11) are divided into left and right two groups of battery plug-in box systems. The copper pipe system includes a first evaporation copper pipe (6) and a second evaporation copper pipe (7) respectively used for cooling two groups of battery plug-in box systems, medium inlets of the first evaporation copper pipe (6) and the second evaporation copper pipe (7) extend out of the battery compartment cabinet (10) and respectively communicate with two interfaces of the condensing branch pipe (2), and medium outlets of the first evaporation copper pipe (6) and the second evaporation copper pipe (7) extend out of the battery compartment cabinet (10) and respectively communicate with two interfaces of the evaporation branch pipe (15).

6. A direct cooling device for a forced air battery system according to claim 5, wherein, The electronic expansion valve is divided into a first electronic expansion valve (3) and a second electronic expansion valve (19); The thermometer is divided into a first thermometer (16) and a second thermometer (17); The pressure gauge is divided into a first pressure gauge (4) and a second pressure gauge (20).

7. A direct cooling device for a forced air battery system according to claim 6, wherein The first electronic expansion valve (3), the first thermometer (16), and the first pressure gauge (4) are all installed on the first evaporation copper pipe (6); the second electronic expansion valve (19), the second thermometer (17), and the second pressure gauge (20) are all installed on the second evaporation copper pipe (7).

8. A direct cooling device for a forced air battery system according to claim 6, wherein It also includes a partition (21) arranged horizontally and dividing the battery compartment cabinet (10) into an upper cavity and a lower cavity, and the battery rack (18) is installed in the lower cavity.

9. A direct cooling device for a forced air battery system according to claim 8, wherein, The upper cavity is provided with a cooling fan (5).

10. A direct cooling device for a forced air battery system according to claim 8, wherein The partition plate (21) is uniformly provided with a plurality of heat dissipation holes.

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