Constant temperature test cabinet for energy storage battery

Abstract

The utility model relates to the technical field of energy storage equipment, and provides an energy storage battery constant temperature test cabinet, which comprises a cabinet, a liquid cooling unit, a liquid cooling pipeline, an air conditioner, a control box and a cooling liquid box, the cabinet comprises a cabinet body and a cabinet door; the liquid cooling unit and the control box are arranged on one side in the cabinet body, and the control box is arranged below the liquid cooling unit and is in wired connection with the liquid cooling unit; the liquid cooling pipeline is arranged in the cabinet body; the air conditioner is arranged on the cabinet door; the other side in the cabinet body is used for assembling a battery assembly formed by connecting multiple layers of battery packs; and the cooling liquid tank is arranged at the bottom of one side of the battery assembly. According to the utility model, heat in the battery assembly is discharged through the liquid cooling unit, and meanwhile, the air conditioner can set the optimum battery working environment temperature, so that the temperature consistency of the battery assembly during charging and discharging tests is ensured. And cooling liquid is stored in the cooling liquid tank, so that cyclic utilization of the cooling liquid is realized, and waste of the cooling liquid is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field especially relates to a kind of energy storage battery constant temperature test cabinet. BACKGROUND

[0002] The temperature consistency anomaly of energy storage battery refers to the temperature distribution inside the battery presents uneven state, which leads to the temperature difference of each part of the battery. This uneven temperature distribution can cause the unbalanced phenomenon of battery in the charging and discharging process, thereby negatively affecting the service life and performance of the battery.

[0003] In order to ensure the temperature consistency of battery pack in the charging and discharging process, the commonly used method at present is to establish constant temperature room and other facilities. However, the construction process of constant temperature room is usually complex, and the cost is relatively high. In addition to this, the cooling liquid is directly discharged from the container after the traditional cooling scheme ends, which not only easily leads to the pollution or waste of cooling liquid, but also cannot realize recycling. The process of manually supplementing cooling liquid is also quite cumbersome, which greatly reduces the work efficiency. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a kind of energy storage battery constant temperature test cabinet, integrates liquid cooling unit and air conditioner and realizes the recycling of cooling liquid, solves the problem of uneven temperature distribution inside the battery and cooling liquid pollution and waste caused by cooling liquid being directly discharged from the container.

[0005] To achieve the above purpose, the utility model adopts the following scheme:

[0006] An energy storage battery constant temperature test cabinet, comprising a cabinet, a liquid cooling unit, a liquid cooling pipeline, an air conditioner, a control box and a cooling liquid tank; the cabinet comprises a cabinet body and a cabinet door; the liquid cooling unit and the control box are placed on one side of the inside of the cabinet body, and the liquid cooling unit is placed above the control box and connected with the wiring port of the control box by wire; the liquid cooling pipeline is arranged inside the cabinet body; the air conditioner is placed on the cabinet door; the other side of the inside of the cabinet body is used for assembling a battery combination body connected by multiple battery packs; the cooling liquid tank is placed at the bottom of one side of the battery combination body.

[0007] Further, the front side of each battery pack of the battery combination body is provided with positive and negative output terminals, and the bottom is provided with a liquid cooling plate, and the liquid cooling plate is provided with inlet and outlet ports.

[0008] Further, the connection mode of the battery pack is series connection.

[0009] Further, the liquid cooling pipeline comprises an inlet liquid pipeline and an outlet liquid pipeline; one end of the inlet liquid pipeline is connected with the liquid cooling unit, the other end is connected with the cooling liquid tank, and a plurality of inlet liquid pipeline branches are arranged in the middle section, and each inlet liquid pipeline branch is connected with the liquid inlet of the liquid cooling plate; one end of the outlet liquid pipeline is connected with the cooling liquid tank, the other end is connected with the liquid cooling unit, and a plurality of outlet liquid pipeline branches are arranged in the middle section, and each outlet liquid pipeline branch is connected with the liquid outlet of the liquid cooling plate.

[0010] Further, a pipeline ball valve is arranged on the liquid cooling pipeline, and is used for controlling the flow direction of the cooling liquid in the battery pack.

[0011] Further, the cabinet body further comprises a liquid supplementing pump, the liquid supplementing pump is arranged below the control box and is connected with the power supply port of the control box through a power supply line.

[0012] Further, the liquid cooling pipeline further comprises a liquid supplementing pipeline; the liquid supplementing pipeline comprises a first liquid supplementing pipeline and a second liquid supplementing pipeline; one end of the first liquid supplementing pipeline is connected with the cooling liquid tank, and the other end is connected with the liquid supplementing pump; one end of the second liquid supplementing pipeline is connected with the liquid supplementing pump, and the other end is connected with the liquid cooling unit.

[0013] Further, positive and negative plug sockets are arranged on the control box.

[0014] Further, total positive and negative cables are reserved in the cabinet body; one end of the total positive cable is connected with the positive electrode of the topmost battery pack, and the other end is connected with the positive plug socket on the control box; one end of the total negative cable is connected with the negative electrode of the bottommost battery pack, and the other end is connected with the negative plug socket on the control box.

[0015] Further, temperature sensors are arranged at the connection positions of the liquid cooling unit and the liquid cooling pipeline, and are used for detecting outlet liquid temperature and return liquid temperature; a pressure sensor is further arranged in the liquid cooling unit, and is used for detecting the cooling liquid pressure in the liquid cooling unit; a liquid level sensor is arranged in the cooling liquid tank, and is used for detecting the cooling liquid level in the cooling liquid tank; the detected temperature, pressure and liquid level data signals are wirelessly transmitted to the upper computer.

[0016] The beneficial effects of the utility model are as follows:

[0017] The energy storage battery constant temperature test cabinet can restore the actual working state of the energy storage battery combination to the maximum extent, discharges the heat in the battery combination through the liquid cooling unit, and can also set the most suitable battery working environment temperature through the air conditioner, so that the consistency of the battery combination during the charging and discharging test is ensured.

[0018] The cooling liquid can be recycled, the waste of the cooling liquid is reduced, the time for manual liquid supplementing is greatly reduced through the automatic liquid supplementing function, and the working efficiency of the charging and discharging test project is improved.

[0019] The advantages of the additional aspects of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification of the utility model form a part of the utility model and serve to provide further understanding of the utility model. The schematic embodiments of the utility model and their descriptions serve to explain the utility model, and do not constitute improper limitations on the utility model.

[0021] Figure 1 It is the front view of the energy storage battery constant temperature test cabinet in the embodiment of the utility model,

[0022] Figure 2 It is the oblique view of the energy storage battery constant temperature test cabinet in the embodiment of the utility model,

[0023] Figure 3 It is the schematic diagram of the control box in the embodiment of the utility model,

[0024] Figure 4 It is the front view of the control box in the embodiment of the utility model,

[0025] Figure 5 It is the plan view of the control box in the embodiment of the utility model,

[0026] Figure 6 It is the left view of the control box in the embodiment of the utility model.

[0027] Wherein, 1-cabinet, 2-liquid cooling unit, 3-air conditioner, 4-control box, 5-cooling liquid tank, 6-liquid outlet, 7-liquid inlet, 8-liquid inlet pipeline, 9-liquid outlet pipeline, 10-liquid outlet pipeline branch, 11-liquid inlet pipeline branch, 12-pipeline ball valve, 13-liquid supplement pump, 14-first liquid supplement pipeline, 15-second liquid supplement pipeline, 16-total positive cable, 17-total negative cable, 18-wiring port, 19-power port, 20-positive socket, 21-negative socket. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be described clearly and completely in the following with reference to the drawings in the embodiments of the utility model. It should be pointed out that the following detailed description is exemplary, and aims at providing further description of the utility model. Unless otherwise specified, all the technical and scientific terms used in this paper have the same meaning as that understood by the ordinary skilled in the art to which the utility model belongs.

[0029] It should be noted that the terms used herein are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model.

[0030] Example 1

[0031] A constant temperature test cabinet for energy storage batteries, such as Figure 1 As shown, the system includes a cabinet 1, a liquid cooling unit 2, liquid cooling piping, an air conditioner 3, a control box 4, and a coolant tank 5. The cabinet 1 includes a cabinet body and a cabinet door. The liquid cooling unit 2 and the control box 4 are located inside the cabinet body on one side, with the liquid cooling unit 2 positioned above the control box 4 and wired to it. The liquid cooling piping is arranged inside the cabinet body. The air conditioner 3 is located on the cabinet door. The other side of the cabinet body is used to assemble a battery assembly consisting of multiple battery packs. The coolant tank 5 is located at the bottom of one side of the battery assembly.

[0032] The integrated liquid chiller and air conditioning system is a highly efficient and energy-saving constant temperature solution. It combines the high-efficiency cooling capacity of the liquid chiller with the convenience of the air conditioning system. The liquid chiller removes heat from inside the battery pack, while the air conditioning can be set to the optimal operating temperature of the battery, ensuring the consistency of the battery pack during charge and discharge tests and providing a comprehensive temperature control environment for the battery pack.

[0033] Specifically, each battery pack layer of the battery assembly has positive and negative output terminals on one side of its front, and a liquid cooling plate at the bottom, with an outlet 6 and an inlet 7 on the liquid cooling plate.

[0034] The battery packs can be connected in series, in parallel, or in a series-parallel configuration.

[0035] In this embodiment, the battery pack is connected in series. For example... Figure 3 As shown, the control box 4 is equipped with a wiring port 18, which can communicate with the liquid cooling unit 2 via RS485.

[0036] A temperature sensor (not shown in the attached diagram) is installed at the connection between the liquid chiller unit 2 and the liquid cooling pipeline to detect the outlet liquid temperature and return liquid temperature. The liquid chiller unit 2 is equipped with a compressor and a heat pump (not shown in the attached diagram) and transmits the temperature data signal wirelessly to the host computer through the control box.

[0037] In this embodiment, the liquid chiller unit 2 operates in three modes: self-circulation mode, cooling mode, and heating mode, with self-circulation mode being the default. If the temperature data detected by the temperature sensor is higher than the cooling threshold (24℃) set by the host computer, the host computer sends a cooling signal to start the compressor through the control box, and the liquid chiller unit 2 enters the cooling mode. Cooling stops when the temperature reaches [cooling threshold (24℃) - deviation value (2℃)]. If the detected temperature data is lower than the heating threshold (16℃) set by the host computer, the host computer sends a heating signal to start the heat pump, and the liquid chiller unit 2 enters the heating mode. Heating stops when the temperature reaches [heating threshold (16℃) + deviation value (2℃)].

[0038] The liquid cooling unit monitors the temperature of the cooling liquid in real time through the temperature sensor, ensures that the battery assembly operates in a suitable temperature range, thereby prolongs the battery life and guarantees the accuracy of the test.

[0039] The temperature sensor detects the temperature, the temperature data is compared with the threshold value, and the related control of the refrigeration, heating signal generation, transmission and control box starting the heat pump and the compressor adopts the prior art.

[0040] The liquid cooling pipeline includes a liquid inlet pipeline 8 and a liquid outlet pipeline 9; one end of the liquid inlet pipeline 8 is connected with the liquid cooling unit 2, the other end is connected with the cooling liquid tank 5, and a plurality of liquid inlet pipeline branches 11 are arranged in the middle section, each liquid inlet pipeline branch 11 is connected with the liquid inlet port 7 of the liquid cooling plate; one end of the liquid outlet pipeline 9 is connected with the cooling liquid tank 5, the other end is connected with the liquid cooling unit 2, and a plurality of liquid outlet pipeline branches 10 are arranged in the middle section, each liquid outlet pipeline branch 10 is connected with the liquid outlet port 6 of the liquid cooling plate.

[0041] A pipeline ball valve 12 is arranged on the liquid cooling pipeline, which is used to control the flow direction of the cooling liquid in the battery pack.

[0042] In this embodiment, the pipeline ball valve 12 is arranged on the liquid inlet pipeline 8 and the liquid outlet pipeline 9 close to one end of the cooling liquid tank 5, between the battery assembly and the cooling liquid tank 5, if the pipeline ball valve 12 is opened, the cooling liquid will flow out from the liquid inlet port and the liquid outlet port of the battery pack, and at the same time flow to the cooling liquid tank 5.

[0043] The cabinet body is also provided with a liquid supplementing pump 13, and the liquid supplementing pump 13 is arranged below the control box 4; the liquid supplementing pump 13 is provided with a power line, and the power line is connected with the power port 19 of the control box 4.

[0044] Specifically, the liquid cooling pipeline further includes a liquid supplementing pipeline; the liquid supplementing pipeline is divided into a first liquid supplementing pipeline 14 and a second liquid supplementing pipeline 15; one end of the first liquid supplementing pipeline 14 is connected with the cooling liquid tank 5, and the other end is connected with the liquid supplementing pump 13; one end of the second liquid supplementing pipeline 15 is connected with the liquid supplementing pump 13, and the other end is connected with the liquid cooling unit 2.

[0045] The liquid cooling unit 2 is also provided with a pressure sensor (not shown in the figure) for detecting the pressure of the cooling liquid in the liquid cooling unit 2; the pressure data signal is transmitted to the upper computer wirelessly through the control box 4.

[0046] In this embodiment, when the pressure sensor detects that the cooling liquid level is lower than the pressure threshold value (0.3Mpa) set by the upper computer, a liquid shortage signal is sent out, and the liquid supplementing pump 13 is automatically started to supplement the liquid through the control box 4, the cooling liquid in the cooling liquid tank 5 is pumped into the liquid cooling unit 2, and the liquid supplementing is stopped when the liquid level reaches (1.5Mpa).

[0047] The cooling liquid tank 5 is provided with a liquid level sensor (not shown in the figure) inside for detecting the liquid level of the cooling liquid inside the cooling liquid tank 5; and the liquid level data signal is wirelessly transmitted to the upper computer.

[0048] In this embodiment, when it is detected that the cooling liquid in the cooling liquid tank 5 is insufficient, the upper computer prompts an alarm, and the cooling liquid tank 5 is taken out for manual liquid supplement.

[0049] The pressure sensor and the liquid level sensor involved above, the comparison of the pressure data with the threshold value, the generation and transmission of the liquid shortage signal and the liquid level data signal, and the related control of the opening of the control box to start the liquid supplement pump all adopt the existing technology.

[0050] The operation is performed through the top liquid discharge port, without the need for complex tools or equipment, simplifying the process of replacing and supplementing the cooling liquid. The quick supplement or replacement of the cooling liquid reduces the downtime of the constant temperature test cabinet, improving the efficiency of the equipment. The discharge of old cooling liquid through the liquid discharge port can more effectively recycle and dispose of old cooling liquid, reducing environmental pollution. This design not only improves the convenience and safety of operation, but also helps to improve the efficiency of equipment operation and the simplicity of maintenance, while taking into account environmental factors and cost-effectiveness.

[0051] As shown in Figure 5 The control box 4 is provided with a positive electrode socket 20 and a negative electrode socket 21.

[0052] The cabinet body is provided with a total positive electrode cable 16 and a total negative electrode cable 17; one end of the total positive electrode cable 16 is connected to the positive electrode of the topmost battery pack, and the other end is connected to the positive electrode socket 20 on the control box 4; one end of the total negative electrode cable 17 is connected to the negative electrode of the bottommost battery pack, and the other end is connected to the negative electrode socket 21 on the control box 4.

[0053] In this embodiment, the constant temperature maintaining process of the energy storage battery constant temperature test cabinet is as follows:

[0054] Step 1: Push the battery assembly into the cabinet body, and connect the liquid inlet pipe 8 and the liquid outlet pipe 9 of the liquid cooling pipe to the liquid inlet 7 and the liquid outlet 6 of the battery assembly;

[0055] Step 2: Close the pipe ball valve 12 on the liquid cooling pipe;

[0056] Step 3: Connect the positive and negative electrodes of the battery pack in series, and connect one end of the total positive electrode cable 16 and the total negative electrode cable 17 reserved in the cabinet body to the positive electrode of the topmost battery pack and the negative electrode of the bottommost battery pack respectively, and the other end to the positive electrode socket 20 and the negative electrode socket 21 on the control box 4. Start the charging and discharging of the battery.

[0057] Step 4: start liquid cooling unit 2 during charging process, cooling liquid flows into the bottom liquid cooling plate of battery pack from liquid cooling pipeline through liquid cooling unit 2; at the same time, start air conditioner 3 to control the temperature in the battery cabin within a suitable range, so as to ensure the consistency of each battery cell during charging and discharging process. The data of each battery pack can also be read through the upper computer to ensure the safety of the battery cell during charging and discharging process.

[0058] Step 5: after the charging and discharging process is completed, close the air conditioner 3, close the liquid cooling unit 2, open the pipeline ball valve 12 on the liquid cooling pipeline, the cooling liquid in the inlet pipeline 8 and the outlet pipeline 9 will flow into the cooling liquid tank 5 at the same time, after the cooling liquid is completely drained, the inlet and outlet joint of the liquid cooling pipeline and the battery assembly is pulled apart, the positive and negative cables are pulled out, and the battery assembly is pulled out from the constant temperature test cabinet.

[0059] Step 6: after multiple cycles, the cooling liquid in the liquid cooling unit 2 is continuously reduced, the upper computer sends a liquid shortage signal, and the control box 4 automatically starts the liquid supplement pump 13 to pump the cooling liquid in the cooling liquid tank 5 into the liquid cooling unit 2, and the cooling liquid realizes recycling.

[0060] Step 7: if the cooling liquid needs to be replaced due to deterioration, or the cooling liquid in the cooling liquid tank 5 is insufficient, the cooling liquid tank 5 can be pulled out from the constant temperature test cabinet, and the cooling liquid can be supplemented or replaced through the liquid outlet at the top.

[0061] Although the specific embodiments of the utility model have been described above with reference to the drawings, it is not a limitation on the protection scope of the utility model, and those skilled in the art should understand that various modifications or deformations made by those skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A constant temperature testing cabinet for energy storage batteries, characterized in that, The system includes a cabinet, a liquid cooling unit, liquid cooling piping, an air conditioner, a control box, and a coolant tank. The cabinet includes a cabinet body and a cabinet door. The liquid cooling unit and the control box are located inside one side of the cabinet body, with the liquid cooling unit positioned above the control box and wired to a connection port on the control box. The liquid cooling piping is arranged inside the cabinet body. The air conditioner is located on the cabinet door. The other side of the cabinet body is used to assemble a battery assembly consisting of multiple battery packs. The coolant tank is located at the bottom of one side of the battery assembly.

2. The constant temperature test cabinet for energy storage batteries as described in claim 1, characterized in that, Each battery pack layer of the battery assembly has positive and negative output terminals on one side of its front, and a liquid cooling plate at the bottom with inlet and outlet ports.

3. The constant temperature test cabinet for energy storage batteries as described in claim 1, characterized in that, The battery packs are connected in series.

4. The constant temperature test cabinet for energy storage batteries as described in claim 2, characterized in that, The liquid cooling pipeline includes an inlet pipeline and an outlet pipeline; one end of the inlet pipeline is connected to the liquid cooling unit, and the other end is connected to the coolant tank. Multiple inlet pipeline branches are provided in the middle section, and each inlet pipeline branch is connected to the liquid inlet of the liquid cooling plate; one end of the outlet pipeline is connected to the coolant tank, and the other end is connected to the liquid cooling unit. Multiple outlet pipeline branches are provided in the middle section, and each outlet pipeline branch is connected to the liquid outlet of the liquid cooling plate.

5. The constant temperature test cabinet for energy storage batteries as described in claim 1, characterized in that, A ball valve is installed on the liquid cooling pipeline to control the flow direction of the coolant in the battery pack.

6. The constant temperature test cabinet for energy storage batteries as described in claim 1, characterized in that, The cabinet is also equipped with a replenishment pump, which is located below the control box and connected to the power port of the control box via a power cord.

7. The constant temperature test cabinet for energy storage batteries as described in claim 6, characterized in that, The liquid cooling pipeline also includes a replenishment pipeline; the replenishment pipeline is divided into a first replenishment pipeline and a second replenishment pipeline; one end of the first replenishment pipeline is connected to the coolant tank and the other end is connected to the replenishment pump; one end of the second replenishment pipeline is connected to the replenishment pump and the other end is connected to the liquid cooling unit.

8. The constant temperature test cabinet for energy storage batteries as described in claim 1, characterized in that, The control box is equipped with positive and negative sockets.

9. The constant temperature test cabinet for energy storage batteries as described in claim 8, characterized in that, The cabinet contains pre-installed main positive and negative cables; one end of the main positive cable is connected to the positive terminal of the top battery pack, and the other end is connected to the positive socket on the control box; one end of the main negative cable is connected to the negative terminal of the bottom battery pack, and the other end is connected to the negative socket on the control box.

10. The constant temperature test cabinet for energy storage batteries as described in claim 1, characterized in that, Temperature sensors are installed at the connection between the liquid chiller and the liquid cooling pipeline to detect the outlet and return liquid temperatures; a pressure sensor is also installed inside the liquid chiller to detect the internal coolant pressure; a level sensor is installed inside the coolant tank to detect the coolant level; the detected temperature, pressure, and level data signals are all wirelessly transmitted to the host computer.

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