Single-bag temperature regulation energy storage temperature control system

Abstract

The utility model discloses a single pack temperature regulation energy storage temperature control system in the field of battery PACK pack temperature control, which comprises an air conditioner external unit and at least two battery PACK packs, a battery cell and a heat dissipation coil pipe are arranged in each battery PACK pack, one side of each battery PACK pack is provided with a first air pipe interface and a first liquid pipe interface which are connected with two ends of the heat dissipation coil pipe, and the other side of each battery PACK pack is provided with a second air pipe interface and a second liquid pipe interface which are connected with two ends of the heat dissipation coil pipe. The air conditioner outdoor unit is connected with the battery PACK pack through a heat dissipation air pipe and a heat dissipation liquid pipe, the heat dissipation air pipe comprises an air pipe main pipe connected with the air conditioner outdoor unit and at least two air pipe branch pipes with one ends communicated with the air pipe main pipe, the ends, away from the air pipe main pipe, of the air pipe branch pipes are connected with the first air pipe connector, and the heat dissipation liquid pipe comprises a liquid pipe main pipe connected with the air conditioner outdoor unit. One ends of the liquid pipe branch pipes are communicated with the liquid pipe main pipe, the ends, away from the liquid pipe main pipe, of the liquid pipe branch pipes are connected with the first liquid pipe connector, electronic expansion valves for controlling refrigerant supply are installed on the liquid pipe branch pipes, and the air conditioner outdoor unit is connected with the battery cell through a BMS and obtains temperature data of the battery cell to control the opening degree of the electronic expansion valves.

Description

Technical Field

[0001] The utility model relates to the technical field of battery PACK temperature control, in particular to a single-pack temperature regulating energy storage temperature control system. Background Art

[0002] A battery cluster is a combination of multiple battery packs connected in series and parallel, packaged, encapsulated, and assembled. Existing immersion-cooled battery clusters typically use a tank of oil to cool the entire cluster, dissipating heat through oil circulation. Alternatively, each battery pack has its own oil tank, with oil supplied to each pack through a main oil supply line. Alternatively, each battery pack has its own oil tank, with air conditioning coils introduced to dissipate heat. Refrigerant flows through the coils, and the refrigerant is distributed to each battery pack through a copper pipe distributor to cool the pack.

[0003] However, this method not only fails to ensure uniform distribution of cooling capacity for each battery pack, but also fails to adjust cooling capacity distribution according to real-time battery heating, thereby ensuring that the temperature of the entire cluster of energy storage batteries remains relatively consistent. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technical solutions, the utility model provides a single-pack temperature regulation energy storage temperature control system, which can effectively solve the technical problem that the current battery cluster cannot control the temperature of a single battery PACK.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A single-pack temperature regulation and energy storage temperature control system includes an air conditioner outdoor unit and at least two battery packs. The battery packs are equipped with battery cells for power supply and heat dissipation coils for heat dissipation. One side of the battery pack is provided with a first air pipe interface and a first liquid pipe interface connected to both ends of the heat dissipation coil. The air conditioner outdoor unit and the battery pack are connected through a heat dissipation air pipe and a heat dissipation liquid pipe. The air conditioner outdoor unit transports liquid refrigerant to the battery pack through the heat dissipation liquid pipe, and the battery pack transports gaseous refrigerant to the air conditioner outdoor unit through the heat dissipation air pipe. The heat dissipation air pipe includes an air pipe main connected to the air conditioner outdoor unit, and at least two air pipes with one end connected to the heat dissipation coil. An air pipe branch is connected to the air pipe main, and one end of the air pipe branch is connected to the first air pipe interface away from the air pipe main. The heat dissipation liquid pipe includes a liquid pipe main connected to the air conditioner outdoor unit, and at least two liquid pipe branches with one end connected to the liquid pipe main. One end of the liquid pipe branch is connected to the first liquid pipe interface away from the liquid pipe main. The liquid pipe branch is installed with an electronic expansion valve for controlling the supply of liquid refrigerant. The air conditioner outdoor unit is connected to the battery cell through the BMS and obtains the temperature data of the battery cell. Then, the opening of the electronic expansion valve connected to the corresponding battery PACK package is controlled according to the temperature data of the battery cell, thereby controlling the flow of refrigerant to adjust the battery cell temperature of each battery PACK package.

[0007] Furthermore, a cavity for filling with coolant is formed in the battery PACK package, and a liquid injection and discharge port and a pressure relief port connected to the cavity are installed on one side of the battery PACK package. The liquid injection and discharge port is used to inject or discharge the coolant in the cavity, and the pressure relief port is used to adjust the pressure inside the battery PACK package.

[0008] Furthermore, the heat dissipation coil is repeatedly bent and arranged above the battery core.

[0009] Furthermore, a positive electrode interface and a negative electrode interface that are electrically conductive with the battery cell are installed on one side of the battery PACK.

[0010] Furthermore, the air conditioner outdoor unit is provided with a second air pipe interface and a second liquid pipe interface, the second air pipe interface is connected to the air pipe main, and the second liquid pipe interface is connected to the liquid pipe main.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] After multiple battery PACKs are connected to the air conditioner outdoor unit, the utility model provides an electronic expansion valve on the liquid pipe branch for conveying liquid refrigerant for each battery PACK. The air conditioner outdoor unit can individually control the opening of the corresponding electronic expansion valve according to the temperature of each battery PACK to adjust the temperature, thereby achieving the effect of controlling a single battery PACK, achieving temperature balance, and reducing the impact of temperature differences caused by different heating of the battery PACKs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0014] Figure 2 For the embodiment of the utility model Figure 1 A schematic diagram of the structure of part A in the middle;

[0015] Figure 3 This is a schematic structural diagram of the outdoor unit of the air conditioner according to an embodiment of the present utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the battery PACK package according to an embodiment of the utility model;

[0017] Figure 5 This is a schematic diagram of the heat dissipation air pipe structure of an embodiment of the utility model;

[0018] Figure 6 This is a schematic diagram of the heat dissipation liquid pipe structure of an embodiment of the utility model;

[0019] Figure 7 This is a simplified connection diagram of the internal structure of an embodiment of the utility model;

[0020] Figure 8 This is a schematic diagram of the internal structure and working direction of an embodiment of the utility model;

[0021] Numbers in the figure:

[0022] 1-air conditioner outdoor unit, 2-battery pack, 3-battery cell, 4-heating coil, 5-first air pipe interface, 6-first liquid pipe interface, 7-heating air pipe, 8-heating liquid pipe, 9-cavity, 10-liquid injection and drainage port, 11-pressure relief port, 12-positive electrode interface, 13-negative electrode interface, 14-second air pipe interface, 15-second liquid pipe interface, 16-evaporator;

[0023] 701-tracheal main tube, 702-tracheal branch tube;

[0024] 801-Liquid pipe main, 802-Liquid pipe branch, 803-Electronic expansion valve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-8As shown, the utility model provides a single-pack temperature regulation energy storage temperature control system, whose structure mainly includes an air-conditioning outdoor unit 1 and five battery PACK packages 2. When in use, the air-conditioning outdoor unit 1 can control the internal temperature of the five battery PACK packages 2 separately, so that the temperature of the five battery PACK packages 2 is balanced and there will be no temperature difference.

[0027] Regarding the internal structure of the battery pack 2, a cavity 9 for filling with coolant is formed inside the battery pack 2. The structure of the battery pack 2 also includes a battery cell 3 and a heat dissipation coil 4 installed in the cavity 9. The battery cell 3 is mainly used for power supply, and the heat dissipation coil 4 is mainly used for heat dissipation. The installed battery cell 3 and heat dissipation coil 4 are completely immersed in the coolant. When the battery cell 3 is working, it will generate heat, and the heat dissipated at this time will be absorbed by the coolant. In this case, the temperature of the battery cell 3 will decrease, but the temperature of the coolant will increase, and the heat of the coolant will be absorbed by the heat dissipation coil 4 at the same time.

[0028] When the five battery packs 2 are connected to the air conditioner outdoor unit 1, the air conditioner outdoor unit 1 and the battery packs 2 are connected via a heat dissipation air pipe 7 and a heat dissipation liquid pipe 8. The air conditioner outdoor unit 1 supplies a lower-temperature liquid refrigerant to the battery packs 2 via the heat dissipation liquid pipe 8, and the battery packs 2 supply a heat-absorbing gaseous refrigerant to the air conditioner outdoor unit 1 via the heat dissipation air pipe 7. At the same time, a first air pipe interface 5 and a first liquid pipe interface 6 are provided on one side of the battery pack 2, which are connected to both ends of the heat dissipation coil 4. The heat dissipation liquid pipe 8 includes a main liquid pipe 801 connected to the second liquid pipe interface 15 of the air conditioner outdoor unit 1, and five branch liquid pipes 802, one end of which is connected to the main liquid pipe 801. The ends of the branch liquid pipes 802 away from the main liquid pipe 801 are connected to the first liquid pipe interface 6. The heat dissipation air pipe 7 comprises a main air pipe 701 connected to the second air pipe interface 14 of the air conditioner outdoor unit 1, and five branch air pipes 702, one end of which is connected to the main air pipe 701. The ends of the branch air pipes 702, remote from the main air pipe 701, are connected to the first air pipe interface 5. During operation, the air conditioner outdoor unit 1 delivers liquid refrigerant to the five battery packs 2 via the main liquid pipe 801 and the five branch liquid pipes 802, thereby absorbing heat from the battery packs 2. When the liquid refrigerant flows into the heat dissipation coil 4, it exchanges heat with the coolant. The heated refrigerant evaporates and vaporizes, then flows through the five branch air pipes 702 to the main air pipe 701 and back to the air conditioner outdoor unit 1.

[0029] In order to better control the refrigerant input to each battery PACK 2, an electronic expansion valve 803 for controlling the flow of liquid refrigerant is installed on each of the five liquid pipe branches 802. In order to better obtain the temperature inside each battery PACK 2, the air conditioner outdoor unit 1 is connected to the battery cell 3 through the BMS, and obtains the temperature data of the battery cell 3. The BMS then controls the opening of the electronic expansion valve 803 connected to the corresponding battery PACK 2 based on the temperature data of the battery cell 3 to adjust the temperature of the battery cell 3 of the battery PACK 2. When detecting the temperature of the battery cell 3, a temperature probe 16 is installed in each battery PACK 2. The temperature probe 16 is connected to the BMS. The BMS can easily obtain the temperature of the corresponding battery PACK 2 and provide a signal of the corresponding detection result to the BMS controller. During operation, this solution uses the controller inside the BMS to simultaneously control the status of the air-conditioning outdoor unit 1, obtain the temperature of each battery PACK package 2, and control the electronic expansion valve 803 corresponding to each battery PACK package 2. The controller individually controls the corresponding battery expansion valve 803 according to the temperature inside the five battery PACK packages 2. In this way, the temperature balance of each battery PACK package 2 can be easily maintained.

[0030] In addition, in order to better allow the heat dissipation coil 4 to absorb the heat emitted by the battery core 3, the heat dissipation coil 4 adopts a repeatedly bent structure and is distributed above each battery core 3, so as to absorb the heat emitted by the battery core 3 over a larger range.

[0031] On one side of the battery pack 2, there are installed a liquid injection and discharge port 10 and a pressure relief port 11 that are connected to the cavity 9. The liquid injection and discharge port 10 is used to inject or discharge the coolant in the cavity 9, and the pressure relief port 11 is used to adjust the pressure inside the battery pack 2. Also installed on one side of the battery pack 2 are a positive electrode interface 12 and a negative electrode interface 13 that are electrically conductive to the battery cell 3 for power connection.

[0032] Compared with traditional technology, after multiple battery PACK packages 2 are connected to the air-conditioning outdoor unit 1, each battery PACK package 2 is equipped with an electronic expansion valve 803 on the liquid pipe branch 802 corresponding to the liquid refrigerant. The air-conditioning outdoor unit 1 will control the opening of the corresponding electronic expansion valve 803 according to the temperature of each battery PACK package 2 to adjust the temperature, so as to achieve the effect of controlling a single battery PACK package 2, achieve temperature balance, and reduce the temperature difference caused by the different heating of the battery PACK package 2.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

Claims

1. A single-pack temperature regulation and energy storage temperature control system, comprising an air conditioner outdoor unit and at least two battery packs, wherein the battery packs are equipped with battery cells for power supply and heat dissipation coils for heat dissipation. One side of the battery pack is provided with a first air pipe interface and a first liquid pipe interface connected to both ends of the heat dissipation coils, characterized in that: The air conditioner outdoor unit is connected to the battery PACK package through a heat dissipation air pipe and a heat dissipation liquid pipe. The air conditioner outdoor unit transports liquid refrigerant to the battery PACK package through the heat dissipation liquid pipe, and the battery PACK package transports gaseous refrigerant to the air conditioner outdoor unit through the heat dissipation air pipe. The heat dissipation air pipe includes an air pipe main connected to the air conditioner outdoor unit, and at least two air pipe branches whose one end is connected to the air pipe main, and the end of the air pipe branch away from the air pipe main is connected to the first air pipe interface. The heat dissipation liquid pipe includes a liquid pipe main connected to the air conditioner outdoor unit, and at least two liquid pipe branches whose one end is connected to the liquid pipe main, and the end of the liquid pipe branch away from the liquid pipe main is connected to the first liquid pipe interface. The liquid pipe branch is installed with an electronic expansion valve for controlling the supply of liquid refrigerant. The air conditioner outdoor unit is connected to the battery cell through the BMS and obtains the temperature data of the battery cell, and then controls the opening of the electronic expansion valve connected to the corresponding battery PACK package according to the temperature data of the battery cell, thereby controlling the flow of refrigerant to adjust the battery cell temperature of each battery PACK package.

2. The single-package temperature regulation and energy storage temperature control system according to claim 1, characterized in that: A cavity for filling with coolant is formed in the battery PACK package. A liquid injection and discharge port and a pressure relief port connected to the cavity are installed on one side of the battery PACK package. The liquid injection and discharge port is used to inject or discharge the coolant in the cavity, and the pressure relief port is used to adjust the pressure inside the battery PACK package.

3. The single-package temperature regulation and energy storage temperature control system according to claim 1, characterized in that: The heat dissipation coil is arranged above the battery core after being bent repeatedly.

4. The single-package temperature regulation and energy storage temperature control system according to claim 1, characterized in that: The battery PACK is provided with a positive electrode interface and a negative electrode interface for conducting electricity with the battery cell on one side.

5. A single-package temperature regulation and energy storage temperature control system according to any one of claims 1 to 4, characterized in that: The air conditioner outdoor unit is provided with a second air pipe interface and a second liquid pipe interface, the second air pipe interface is connected to the air pipe main, and the second liquid pipe interface is connected to the liquid pipe main.

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