CN211828868U - Battery energy storage cabin and temperature adjusting system thereof - Google Patents

Abstract

The utility model relates to a battery energy storage compartment and a temperature adjustment system thereof. The battery energy storage compartment comprises at least five battery racks, an air conditioner and an air supply air duct for supplying air to the battery energy storage compartment. Connected with the air supply air duct, each battery rack is provided with multiple battery boxes, and also includes an auxiliary air duct, a temperature acquisition unit, a speed-adjusting fan and a main control unit. and each auxiliary air duct is connected with the air supply air duct; the temperature acquisition unit collects the temperature of the cells in each battery box on the battery rack; the speed-adjusting fan is set at the connection between the air supply air duct and the auxiliary air duct, and controls the corresponding auxiliary air ducts The air volume in the air duct; the main control unit controls the speed-regulating fan after receiving the temperature signal, and changes the air volume by independently controlling the fans of different battery racks to reduce the temperature difference between the battery boxes on different battery racks, so as to realize the battery in the energy storage compartment. The temperature of the battery cells in the box is balanced.

Description

A battery energy storage compartment and its temperature regulation system

technical field

The utility model relates to a battery energy storage compartment and a temperature adjustment system thereof.

Background technique

Energy storage projects mostly use prefabricated cabins with pre-installed energy storage batteries (hereinafter referred to as energy storage cabins), which have the characteristics of strong environmental adaptability, convenient use and maintenance, low construction cost, and short construction period. The MW-level lithium iron phosphate energy storage unit is installed in the energy storage cabin. During the charging and discharging process, the lithium iron phosphate battery will inevitably generate a large amount of heat. The heat is exchanged through the air conditioner and discharged out of the cabin in time.

At this stage, the main air duct is configured in the energy storage cabin to distribute air-conditioning cold or hot air to each battery cluster, and the air is returned through the aisle of the energy storage cabin and enters the air-conditioning return air outlet. At present, the cross-sectional size and installation position of the air duct in the energy storage cabin vary. For a single energy storage unit in the energy storage cabin, the air duct is long and the air outlet is configured. The temperature of the batteries in the cabin is not balanced.

Utility model content

The purpose of the utility model is to provide a battery energy storage compartment and a temperature adjustment system thereof, so as to solve the problem of unbalanced battery temperature in the existing energy storage compartment.

In order to achieve the above purpose, the utility model proposes a temperature adjustment system for a battery energy storage compartment, comprising: an air conditioner and an air supply air duct for supplying air to the battery energy storage compartment, and the air outlet of the air conditioner is communicated with the air supply air duct , characterized in that the temperature adjustment system also includes

an auxiliary air duct, the auxiliary air duct is used for supplying air to the corresponding battery rack in the battery energy storage compartment, and each auxiliary air duct is communicated with the air supply air duct;

The temperature collection unit is used to collect the temperature of the cells in each battery box on the battery rack;

A speed-adjusting fan, which is arranged at the connection between the supply air duct and the auxiliary air duct, and is used to control the air volume in the corresponding auxiliary air duct;

The main control unit, the input of the main control unit is connected to the output of the temperature acquisition unit, and the output of the main control unit controls the speed-adjusting fan, which is used to control the speed of the speed-adjusting fan after receiving the temperature signal.

Beneficial effects: The utility model adds a speed-adjusting fan at the connection between the air supply air duct and the auxiliary air duct, and by controlling the rotational speed of the speed-adjusting fan, the air volume actually fed into the auxiliary air ducts of different battery racks can be controlled, and under refrigeration conditions When the temperature difference is greater than the set temperature difference threshold, the air volume of the fan corresponding to the battery rack with a high temperature is increased. Under heating conditions, when the temperature difference is greater than the set temperature difference threshold, the battery with a low temperature is controlled. The air volume of the fans corresponding to the racks increases, that is, by independently controlling the rotational speed of the speed-adjusting fans in the auxiliary air ducts of different battery racks to change the air volume, the temperature difference between the battery boxes on different battery racks is reduced, so as to achieve the temperature of the battery boxes in the energy storage compartment. Balance, thereby improving the reliability of the battery energy storage compartment.

Further, the number of the speed-adjusting fans is the same as the number of auxiliary air ducts, and each air supply air duct and the auxiliary air duct are connected with a speed-adjusting fan. By controlling the speed of the speed-adjusting fan, any battery can be controlled. The intake air volume of the rack can be accurately adjusted and controlled.

Further, the air outlet of the air conditioner is in sealing communication with the air supply air duct through an air duct. The airtight communication can completely send the air generated by the air conditioner into the air supply duct, thereby improving the heat exchange efficiency.

Further, the air supply air duct is in sealing communication with the auxiliary air duct through an air duct. The airtight communication enables the wind in the air supply air duct to be sent into the auxiliary air duct without damage, thereby improving the heat exchange efficiency.

Further, the temperature collection unit is a battery management unit. The temperature acquisition by the battery management unit in the energy storage compartment avoids adding additional temperature sensors, which can reduce the cost of the battery energy storage compartment.

In order to achieve the above purpose, the utility model proposes a battery energy storage compartment, which includes at least five battery racks, an air conditioner and an air supply air duct for supplying air to the battery energy storage compartment. Each battery rack is provided with a plurality of battery boxes, characterized in that it also includes

Auxiliary air ducts, the auxiliary air ducts supply air to the corresponding battery racks in the battery energy storage compartment, and each auxiliary air duct is communicated with the air supply air duct;

a temperature collection unit, the temperature collection unit collects the temperature of the cells in each battery box on the battery rack;

A speed-adjusting fan, which is arranged at the connection between the supply air duct and the auxiliary air duct, and controls the air volume in the corresponding auxiliary air duct;

The main control unit, the input of the main control unit is connected to the output of the temperature acquisition unit, the output of the main control unit controls the speed-adjusting fan, and controls the speed of the speed-adjusting fan after receiving the temperature signal.

Beneficial effects: The utility model adds a speed-adjusting fan at the connection between the air supply air duct and the auxiliary air duct, and by controlling the rotational speed of the speed-adjusting fan, the air volume actually fed into the auxiliary air ducts of different battery racks can be controlled, and under refrigeration conditions When the temperature difference is greater than the set temperature difference threshold, the air volume of the fan corresponding to the battery rack with a high temperature is increased. Under heating conditions, when the temperature difference is greater than the set temperature difference threshold, the battery with a low temperature is controlled. The air volume of the fans corresponding to the racks increases, that is, by independently controlling the fans in the auxiliary air ducts of different battery racks to change the air volume, the temperature difference between the battery boxes on different battery racks is reduced, so as to achieve the temperature balance of the battery boxes in the energy storage compartment, and then Improve the reliability of the battery storage compartment.

Further, the number of the speed-adjusting fans is the same as the number of auxiliary air ducts, and each air supply air duct and the auxiliary air duct are connected with a speed-adjusting fan. By controlling the speed of the speed-adjusting fan, any battery can be controlled. The intake air volume of the rack can be accurately adjusted and controlled.

Further, the auxiliary air duct is arranged along the back or both sides of the battery box on the battery rack.

Further, the air supply air duct is installed on the upper part of the battery rack.

Further, the air outlet of the air conditioner is in sealing communication with the air supply air duct through an air duct, and the air supply air duct and the auxiliary air duct are in sealed communication through an air duct. The airtight communication enables the wind generated by the air conditioner to be sent into each auxiliary air duct without damage, thereby improving the heat exchange efficiency.

Description of drawings

Fig. 1 is the plan layout drawing of the energy storage cabin of the utility model;

Fig. 2 is the structural schematic diagram of the energy storage cabin of the utility model;

Fig. 3 is the temperature regulation control diagram of the utility model.

Description of drawings: 1. Air supply air duct; 2. Air duct; 3. Speed regulating fan; 4. Air duct; 5. Fan control unit; 6. System management unit; 7. Battery management unit; 8. Air conditioner; 9 , battery box fan; 10, air conditioner; 11, energy storage unit; 12, combiner cabinet; 13, combiner cabinet; 14, energy storage unit; 15, air conditioner.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model is further described in detail below with reference to the accompanying drawings and embodiments, but the embodiments of the present utility model are not limited thereto.

Example of energy storage tank:

The plane layout of the energy storage cabin of the present invention is shown in FIG. 1 , including two energy storage modules. The combiner cabinet 12 , the energy storage unit 11 and the air conditioner 10 are an independent energy storage module; the combiner cabinet 13 , the energy storage unit 14 And the air conditioner 15 is another independent energy storage module.

The energy storage unit includes a plurality of battery clusters connected in parallel. In this embodiment, there are six battery clusters. Each battery cluster includes several battery boxes connected in series. The battery boxes are placed on the battery rack. Depending on the height, the battery box can be placed on one battery rack, or it can be placed on multiple battery racks. In this embodiment, three battery racks are set in each battery cluster. As other embodiments, there are more than five battery clusters, and one or two battery racks may also be provided in each battery cluster.

The purpose of this utility model is to achieve temperature equalization control, specifically, the technical solution proposed for the setting of a large number of battery racks and a long air supply duct. . When the air supply air duct is long, the technical scheme of the utility model will be used.

The technical concept of the present utility model: an auxiliary air duct connected to the air supply air duct is arranged on each battery frame of the energy storage compartment, and a speed-adjusting fan is arranged at the connection between the air supply air duct and the auxiliary air duct. The temperature information of each corresponding fan is controlled to start, stop, and rotate, so that the temperature of the battery boxes on each battery rack is balanced.

In order to achieve temperature equalization control, the battery energy storage compartment of the present invention also includes a temperature adjustment system. As shown in FIG. 2 , the temperature adjustment system includes an air conditioner, a supply air duct and a return air duct, and the air conditioner is arranged in the middle of the battery cluster. An air supply air duct 1 is hoisted on the upper part of the battery cluster, and the air inlet of the air supply air duct 1 is in sealing communication with the air outlet of the air conditioner through an air duct 2 . The air supply air duct 1 sends the cold air or hot air generated by the air conditioner to each battery rack in the battery energy storage compartment through the air supply air duct 1 . In this embodiment, the battery clusters are evenly arranged on both sides of the air conditioner; as another embodiment, the air conditioner may be arranged on one side of the battery clusters.

The temperature adjustment system also includes an auxiliary air duct, a temperature acquisition unit, a speed regulating fan and a main control unit.

The auxiliary air duct is arranged along the back or both sides of the battery box on the battery rack to supply air to each battery rack in the battery storage compartment. The air outlet of air supply air duct 1 is facing the air inlet of each battery rack, and the air The air outlet of channel 1 is sealed and communicated with the air inlet of the corresponding auxiliary air duct of the battery rack through the air duct 4. The auxiliary air duct sends the air volume of the air conditioner into each battery box in the battery rack, and the heat is dissipated through the battery box fan 9 on the front of the battery box. It converges to the return air duct, and then enters the air conditioner return air outlet through the return air duct. The return air duct is set at the front of the battery cluster, that is, the energy storage cabin aisle.

The speed regulating fan 3 is arranged in the air duct 4, and is arranged at the lower part of the air outlet of the air supply air duct 1. By controlling the speed of the speed regulating fan 3, the air volume sent into the auxiliary air duct can be adjusted. The number of speed-adjusting fans can be the same as the number of auxiliary air ducts, and speed-adjusting fans are arranged in the air duct at the connection between each air supply air duct and the auxiliary air duct. As another embodiment, the number of speed-adjusting fans may be less than the number of auxiliary air ducts. In this case, the speed-adjusting fans are generally arranged in several air ducts at one end away from the air conditioner.

A battery box fan 9 is installed at the front of the battery box, and the battery box fan 9 discharges the heat generated by the battery box to the aisle of the energy storage compartment, and then enters the air conditioner return air outlet through the return air duct; the air supply and return air paths are independently set The strategy is to improve the heat exchange efficiency of the energy storage compartment, thereby reducing the temperature of the cells in the battery box, and achieving the purpose of adjusting the temperature difference and cooling.

The temperature acquisition unit can be a separate temperature sensor, but in order to save costs, the present invention uses the temperature acquisition module of the battery management unit 7 of the battery cluster in the battery energy storage compartment as the temperature acquisition unit; each battery cluster is provided with a battery management unit 7. The battery management unit 7 is also configured with several sub-battery management units, the battery management unit 7 is arranged in a high-voltage box of the battery cluster, the sub-battery management unit is arranged in the battery box, and temperature measurement points are set in the battery box for several parallel cells; The sub-battery management unit transmits the temperature value of each temperature measurement point to the temperature acquisition module of the battery management unit 7, and the temperature acquisition module respectively collects the temperature of the cells in each battery box on the three battery racks in its battery cluster, and calculates the temperature value. sent to the main control unit.

The main control unit is included in the combiner cabinet as shown in FIG. 1 , and is used to control the air conditioner and the speed regulating fan 3 . The combiner cabinet can directly control the air conditioner, the speed regulating fan 3 and the battery box fan 9 through the controller; the combiner cabinet can also include the system management unit 6 and the fan control unit 5, the system management unit 6 controls the air conditioner, and the fan control unit 5 controls the speed regulating fan 3 and the battery box fan 9, as shown in Figure 3; the system management unit 6 receives and processes the temperature information of the battery boxes on different battery racks, and controls whether the air conditioner is turned on according to the temperature information. In this embodiment, the combining cabinet includes the system management unit 6 and the fan control unit 5 as an example to describe the implementation of related functions.

When the control air conditioner is turned on, the cold air or hot air is discharged from the air outlet on the upper part of the air conditioner, enters the air supply air duct 1 through the air duct 2, and then enters the auxiliary air ducts of each battery rack through the air duct 4, and the auxiliary air duct sends the air volume of the air conditioner into the battery Each battery box in the rack collects heat to the aisle of the energy storage cabin through the battery box fan 9 on the front of the battery box, and enters the air conditioner return air through the aisle, thereby forming a complete thermal cycle of the energy storage cabin.

While controlling the air conditioner to be turned on, the system management unit 6 sends the temperature information on each battery rack to the fan control unit 5, and the fan control unit 5 makes a judgment according to the temperature difference on each battery rack. If the temperature difference exceeds the set temperature difference If the threshold value is exceeded, the corresponding speed regulating fan 3 is controlled to be turned on, and the purpose of adjusting the rotational speed is achieved by controlling the duty ratio of the speed regulating fan 3, thereby realizing the control of temperature balance.

The system management unit 6 communicates with the air conditioner 8 , the fan control unit 5 , and the battery box fan 9 through the RS485-ModBus protocol.

The working process of the utility model is shown in FIG. 3 .

Refrigeration conditions:

(1) Each battery management unit 7 detects the temperature value of the cells in its corresponding battery cluster in real time, and sends the collected temperature values of the cells of each battery cluster to the system management unit 6 .

(2) The system management unit 6 receives the temperature values of the cells of each battery cluster. If the highest temperature value of the cells in a certain cluster is greater than the first set temperature threshold (for example, 30° C.), the system management unit 6 sends a message to the air conditioner 8 Send a command to turn on the cooling function of the air conditioner 8 , and at the same time, the system management unit 6 sends the temperature value of each battery cluster to the fan control unit 5 .

(3) The fan control unit 5 receives the temperature value of each battery cluster, and if the highest temperature value of the cells in a cluster is greater than the second set temperature threshold (for example, 33°C), it controls to turn on the fan 9 of the battery box in a cluster, wherein The second set temperature threshold is greater than the first set temperature threshold.

(4) The fan control unit 5 judges the highest value of the cell temperature value of each battery cluster in real time, controls the start and stop of the speed regulating fan 3 of each battery cluster according to the value, and according to the relationship in Table 1, controls the speed regulating fan of each battery cluster. speed control. The speed regulating fan 3 adjusts the speed through the duty cycle, and the initial speed is adjusted according to the 30% duty cycle. Table 1 shows the relationship between temperature, speed and duty ratio when the speed regulating fan is controlled under refrigeration conditions.

Table 1

Heating condition:

(1) Each battery management unit 7 detects the temperature value of the cells in its corresponding battery cluster in real time, and sends the collected temperature values of the cells of each battery cluster to the system management unit 6 .

(2) The system management unit 6 receives the temperature values of the cells of each battery cluster. If the highest temperature value of the cells in a certain cluster is less than the first set temperature threshold (for example, 7°C), the system management unit 6 sends a message to the air conditioner 8 Send a command to turn on the heating function of the air conditioner 8 , and at the same time, the system management unit 6 sends the temperature value of each battery cluster to the fan control unit 5 .

(3) The fan control unit 5 receives the temperature value of each battery cluster, and if the highest temperature value of the cells in a cluster is less than the second set temperature threshold (for example, 5°C), it controls to turn on the fan 9 of the battery box of a cluster, wherein The second set temperature threshold is smaller than the first set temperature threshold.

(4) The fan control unit 5 judges the lowest value of the cell temperature value of each battery cluster in real time, controls the start and stop of the speed regulating fan 3 of each battery cluster according to the value, and according to the relationship in Table 1, controls the speed regulating fan of each battery cluster. speed control. The speed regulating fan 3 adjusts the speed through the duty cycle, and the initial speed is adjusted according to the 30% duty cycle. Table 2 shows the relationship between temperature, speed and duty ratio when the speed regulating fan is controlled under heating conditions.

Table 2

Example of temperature regulation system:

The temperature adjustment system of the battery energy storage compartment includes an air conditioner and an air supply air duct for supplying air to the battery energy storage compartment. The temperature adjustment system also includes an auxiliary air duct, a temperature acquisition unit, a speed regulating fan and a main control unit. The output of the control unit controls the speed regulating fan, which is used to control the speed of the speed regulating fan after receiving the temperature signal. The specific adjustment and control of the temperature has been introduced in detail in the above embodiments of the energy storage compartment, and will not be repeated in this embodiment.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit its protection scope. Although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that Those skilled in the art can still make various changes, modifications or equivalent replacements to the specific embodiments of the application after reading the application, but these changes, modifications or equivalent replacements are all within the protection scope of the claims of the present invention.

Claims (10)

1. A temperature regulation system for a battery energy storage compartment, comprising an air conditioner and an air supply air duct for supplying air to the battery energy storage compartment, the air outlet of the air conditioner is communicated with the air supply air duct, and it is characterized in that the temperature The adjustment system further includes auxiliary air ducts, the auxiliary air ducts are used to supply air to the corresponding battery racks in the battery energy storage compartment, and each auxiliary air duct is communicated with the air supply air duct; The temperature collection unit is used to collect the temperature of the cells in each battery box on the battery rack; A speed-adjusting fan, which is arranged at the connection between the supply air duct and the auxiliary air duct, and is used to control the air volume in the corresponding auxiliary air duct; The main control unit, the input of the main control unit is connected to the output of the temperature acquisition unit, and the output of the main control unit controls the speed-adjusting fan, which is used to control the speed of the speed-adjusting fan after receiving the temperature signal. 2 . The temperature adjustment system of the battery energy storage cabin according to claim 1 , wherein the number of the speed regulating fans is the same as the number of auxiliary air ducts, and each air supply air duct is connected to the auxiliary air duct. 3 . There are speed regulating fans everywhere. 3 . The temperature adjustment system of the battery energy storage compartment according to claim 2 , wherein the air outlet of the air conditioner is in sealing communication with the air supply air duct through an air duct. 4 . 4 . The temperature adjustment system of the battery energy storage compartment according to claim 3 , wherein the air supply air duct and the auxiliary air duct are in sealing communication with each other through an air duct. 5 . 5 . The temperature adjustment system of the battery energy storage compartment according to claim 4 , wherein the temperature acquisition unit is a battery management unit. 6 . 6. A battery energy storage compartment, comprising at least five battery racks, an air conditioner and an air supply air duct for supplying air to the battery energy storage compartment, the air outlet of the air conditioner is communicated with the air supply air duct, and each battery rack is A plurality of battery boxes are arranged on it, and it is characterized in that it also includes Auxiliary air ducts, the auxiliary air ducts supply air to the corresponding battery racks in the battery energy storage compartment, and each auxiliary air duct is communicated with the air supply air duct; a temperature collection unit, the temperature collection unit collects the temperature of the cells in each battery box on the battery rack; A speed-adjusting fan, which is arranged at the connection between the supply air duct and the auxiliary air duct, and controls the air volume in the corresponding auxiliary air duct; The main control unit, the input of the main control unit is connected to the output of the temperature acquisition unit, the output of the main control unit controls the speed-adjusting fan, and controls the speed of the speed-adjusting fan after receiving the temperature signal. 7 . The battery energy storage cabin according to claim 6 , wherein the number of the speed-regulating fans is the same as the number of auxiliary air ducts, and each air supply air duct is connected with the auxiliary air duct. Speed regulating fan. 8 . The battery energy storage compartment according to claim 7 , wherein the auxiliary air duct is arranged along the back or both sides of the battery box on the battery rack. 9 . 9 . The battery energy storage compartment according to claim 8 , wherein the air supply air duct is installed on the upper part of the battery rack. 10 . 10 . The battery energy storage compartment according to claim 9 , wherein the air outlet of the air conditioner and the air supply air duct are in sealed communication with the air duct, and the air supply air duct and the auxiliary air duct pass through the air duct. 11 . The air duct is sealed and communicated.

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