Battery box temperature balancing device

Abstract

The utility model discloses a battery box temperature balancing device which comprises a cabinet body, a controller, a temperature control host, an internal circulation pipeline and at least two battery boxes, the temperature control host is provided with a first inlet and a first outlet, the internal circulation pipeline comprises a first pipeline and a second pipeline, and carrier channels are arranged in the battery boxes. The first outlet, the first pipeline, the carrier channel, the second pipeline and the first inlet form a loop. According to the utility model, the airflow channel is scientifically designed, the temperature control slave is arranged in each battery box, and the controller can control the opening of the second inlet and the second outlet of the battery box with the temperature exceeding the first preset value when the battery box with the temperature exceeding the first preset value exists, so that the temperature control host outputs cold air to cool the battery box; and when the temperature of the battery box is lower than or equal to the second preset value, the second inlet and the second outlet of the battery box with the temperature exceeding the first preset value are controlled to be opened, so that the temperature control host outputs hot air to heat the battery box.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heat dissipation, in particular to a battery box temperature balancing device. Background Art

[0002] At present, battery energy storage systems are being used more and more widely in all aspects of power generation and consumption in the fields of new energy, smart grids, energy-saving technologies, etc. Their main functions include upgrading and transforming traditional power grids, shaving peak loads and filling valleys, and improving the grid connection capacity of renewable energy.

[0003] Take energy storage cabinets, for example. As a crucial component of battery energy storage systems, the batteries they contain are significantly affected by temperature. Battery charging and discharging require a certain temperature for proper function. Battery boxes within computer rooms are typically temperature-regulated using air conditioners and other equipment. However, due to the large size of computer rooms and the presence of other heat-generating equipment, if the battery temperature exceeds the safe operating range and prolonged operation in high-temperature environments causes irreversible reactions within the battery, reducing the overall performance of the battery box. Furthermore, if the battery temperature reaches the ignition point of the internal materials and the heat generated by the battery itself cannot be dissipated in a timely manner, thermal runaway may occur. In the related art, temperature control of batteries in energy storage cabinets is generally performed by installing a cooling device in the energy storage cabinet. When the battery temperature rises, cooling gas is input into the battery through the cooling device to reduce the temperature. However, the efficiency of the cooling device on the battery is low. In addition, the thermal conditions in different positions of the battery box are different. After cooling the batteries in the energy storage cabinet, the gas still remains around the batteries, resulting in a poor cooling effect. The cooling device often needs to increase its power to achieve the ideal cooling effect. If the battery temperature distribution is uneven for a long time, the performance of each battery cell in the battery will show differences, which in turn affects the cycle life of the energy storage cabinet.

[0004] In view of this, the inventors of this case conducted in-depth research on the above-mentioned issues, which led to the creation of this case. Utility Model Content

[0005] The purpose of the utility model is to provide a battery box temperature balancing device which improves temperature control flexibility and temperature control efficiency.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solution:

[0007] A battery box temperature balancing device includes a cabinet and a controller arranged in the cabinet, a temperature control host, an internal circulation pipe with gas, liquid or other carriers flowing inside, and at least two battery boxes. The controller is communicatively connected to the temperature control host. The temperature control host has a first inlet and a first outlet. The internal circulation pipe includes a first pipe for transporting the refrigerant carrier or heat carrier generated by the temperature control host to each of the battery boxes through the first outlet and a second pipe for transporting the refrigerant carrier or heat carrier after cooling or heating each of the battery boxes to the first inlet. A carrier channel for the refrigerant carrier or heat carrier to circulate is provided in the battery box. The first outlet, the first pipe, the carrier channel, the second pipe, and the first inlet form a loop.

[0008] Furthermore, the carrier channel has a second inlet and a second outlet, and a plurality of diversion pipes are provided on the first pipe and the second pipe. Each of the diversion pipes on the first pipe is respectively connected to each of the second inlets, and each of the diversion pipes on the second pipe is respectively connected to each of the second outlets.

[0009] Furthermore, a temperature control slave is provided in each battery box, and each temperature control slave is electrically connected to the corresponding second inlet and second outlet, so that the opening and closing of the second inlet and the second outlet are adjusted by the temperature control slave.

[0010] Furthermore, the controller is used to control the temperature-controlled slave machine to open the corresponding second inlet when the temperature in each battery box exceeds a first preset value through the temperature-controlled slave machine, so that the temperature-controlled host machine can transport the refrigerant carrier to the carrier channel of each battery box to cool down each battery box; and is used to control the temperature-controlled slave machine to open the corresponding second outlet when the temperature in each battery box passes through the temperature-controlled slave machine and the temperature is lower than a second preset value, so that the temperature-controlled host machine can transport the heat carrier to the carrier channel of the battery box to heat each battery box.

[0011] By adopting the above-mentioned design scheme, the present invention has the following beneficial effects: the present invention has a sophisticated design and a reasonable structure. Through the scientific design of the airflow channel, a temperature control slave is provided in each battery box. When a battery box with a temperature exceeding a first preset value exists, the controller can control the second inlet and second outlet of the battery box with a temperature exceeding the first preset value to open, causing the temperature control master to output cold air to cool the battery box; and when a battery box with a temperature below or equal to the second preset value exists, the controller can control the second inlet and second outlet of the battery box with a temperature exceeding the first preset value to open, causing the temperature control master to output hot air to heat the battery box. In this way, the present invention can control the state of the second inlet and second outlet of each battery box according to the temperature of each battery box, thereby specifically heating or cooling the individual battery boxes, improving the temperature control flexibility of the system, enhancing the adaptability of the battery to the environment, and ensuring that the temperature of each battery box can be dynamically balanced, reducing temperature differences between battery boxes, and improving system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 A perspective view of a battery according to the present invention;

[0014] In the figure: temperature control host 1, first inlet 11, first outlet 12, internal circulation pipe 2, first pipe 21, second pipe 22, battery box 3, second inlet 31, second outlet 32, carrier channel 33. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. 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.

[0016] Reference Figures 1 to 2 :

[0017] A battery box temperature balancing device includes a cabinet (not shown), a controller disposed therein, a temperature control host 1, at least two battery boxes 3, and an internal circulation pipe 2 through which gas, liquid, or other carriers flow. The controller is communicatively connected to the temperature control host 1. It should be noted that the temperature control host 1 can be, but is not limited to, an industrial air conditioner.

[0018] The temperature control host 1 has a first inlet 11 and a first outlet 12. The internal circulation pipe 2 includes a first pipe 21 for transporting the refrigerant carrier or heat carrier generated by the temperature control host 1 to each battery box 3 through the first outlet 12 and a second pipe 22 for transporting the refrigerant carrier or heat carrier after cooling or heating each battery box 3 to the first inlet 11. A carrier channel 33 for the circulation of the refrigerant carrier or heat carrier is provided in the battery box 3. The first outlet 12, the first pipe 21, the carrier channel 33, the second pipe 22, and the first inlet 11 form a loop. A closed loop is adopted, and the loop pipe layout is optimized to achieve flexible switching between the refrigerant carrier and the heat carrier. An air duct control valve is provided inside the internal circulation pipe 2, which can adjust the air volume and air temperature according to the needs of each battery box 3.

[0019] Furthermore, the carrier channel 33 has a second inlet 31 and a second outlet 32. Several shunt pipes are provided on each of the first and second pipes 21, 22. Each shunt pipe on the first pipe 21 is connected to a respective second inlet 31, and each shunt pipe on the second pipe 22 is connected to a respective second outlet 32. Specifically, the shunt pipes of the first pipe 21 correspond one-to-one to each battery box 3. That is, if there are N battery boxes 3, then there are N shunt pipes on the first pipe 21, and similarly, there are N shunt pipes on the second pipe 22.

[0020] Furthermore, each battery compartment 3 is provided with a temperature control slave (not shown). Each temperature control slave is electrically connected to the corresponding second inlet 31 and second outlet 32, respectively, so as to regulate the opening and closing of the second inlet 31 and second outlet 32. When activated, the temperature control slave of each battery compartment 3 is used to input cold air (or hot air) from the temperature control master 1 into the battery compartment 3, thereby cooling (or heating) the individual battery compartment 3.

[0021] The temperature control slave collects the temperature of each battery box 3. The temperature control slave may include a temperature sensor installed on the battery box 3, which is used to detect the current temperature of the battery box 3 and send the detected temperature data to the controller.

[0022] Furthermore, the controller is used to control the temperature-controlled slave machine to open the corresponding second inlet 31 when the temperature in each battery box 3 exceeds a first preset value (high temperature) through the temperature-controlled slave machine, so that the temperature-controlled host machine 1 transports a refrigerant carrier to the carrier channel 33 of each battery box 3 to cool down each battery box 3; and is used to control the temperature-controlled slave machine to open the corresponding second outlet 32 ​​when the temperature in each battery box 3 is lower than a second preset value (low temperature) through the temperature-controlled slave machine, so that the temperature-controlled host machine 1 transports a heat carrier to the carrier channel 33 of the battery box 3 to heat each battery box 3. When the controller is working, it can be used to control the temperature control slave of the battery box 3 exceeding the first preset value to turn on when there is a battery box 3 with a temperature exceeding the first preset value among the battery boxes 3, so that the temperature control host 1 outputs cold air to the battery box 3 to cool the battery box 3; and it can be used to control the fan of the battery box 3 exceeding the first preset value of the temperature control host 1 to turn on when there is a battery box 3 with a temperature lower than or equal to the second preset value among the battery boxes 3, so that the temperature control host 1 outputs hot air to the battery box 3 to heat the battery box 3.

[0023] In this embodiment, the temperature of each battery box 3 can be controlled separately. When the temperature of the battery box 3 exceeds a first preset value, the temperature control slave of the battery box 3 is turned on to achieve individual cooling of the battery box 3; when the temperature of the battery box 3 is lower than or equal to a second preset value, the temperature control slave of the battery box 3 is turned on to achieve individual heating of the battery box 3. This can reduce the temperature difference between the battery boxes 3 and maintain the performance balance of the entire battery box 3 in the battery cabinet. The utility model not only has a cooling function, but also a heating function, which can provide heating or cooling airflow according to the ambient temperature and the working status of the battery pack. Through intelligent algorithms, the system can judge and switch the hot and cold air ducts in real time to ensure that the battery maintains an appropriate temperature in different seasons.

[0024] Working principle: During the operation of the system, the temperature control slave collects the temperature data of each battery box 3 in real time and transmits the data to the controller. The controller compares and analyzes the real-time data with the preset temperature range. When it is found that the temperature of a battery box 3 exceeds the set range, the system will control the start and stop control of the temperature control slave in each battery box 3 through the temperature control host 1 to heat or cool the battery box 3.

[0025] Specific operations include:

[0026] 1. When the ambient temperature is high or the temperature of the battery box 3 is higher than the set range, the system activates the cooling module of the temperature control host 1 to reduce the air temperature in the internal circulation pipe 2 and speed up the circulation of the cold air to ensure that the cold air is effectively delivered to the battery box 3 with an excessive temperature until the temperature returns to the set range.

[0027] 2. When the ambient temperature is low or the temperature of the battery box 3 is lower than the set range, the system starts the heating module to increase the air flow temperature in the internal circulation pipe 2, and adjusts the circulation speed of the hot air to ensure that the hot air is effectively transmitted to the battery box 3 with a lower temperature until the temperature returns to the set range.

[0028] By adopting the above-mentioned design scheme, the beneficial effects of the present invention are as follows: the present invention has a sophisticated design and a reasonable structure. Through the scientific design of the air flow channel, a temperature control slave is provided in each battery box 3. When there is a battery box 3 with a temperature exceeding the first preset value, the controller can control the second inlet 31 and the second outlet 32 ​​of the battery box 3 with a temperature exceeding the first preset value to open, so that the temperature control host 1 outputs cold air to cool the battery box 3; and when there is a battery box 3 with a temperature lower than or equal to the second preset value, the second inlet 31 and the second outlet 32 ​​of the battery box 3 with a temperature exceeding the first preset value are controlled to open, so that the temperature control host 1 outputs hot air to heat the battery box 3. In this way, the utility model can control the state of the second inlet 31 and the second outlet 32 ​​of each battery box 3 according to the temperature of each battery box 3, so as to heat or cool the single battery box 3 in a targeted manner, thereby improving the temperature control flexibility of the system, enhancing the adaptability of the battery to the environment, and ensuring that the temperature of each battery box 3 can be dynamically balanced, reducing the temperature difference between the battery boxes 3, and improving the system performance; the utility model provides an intelligent management system for thermal balance of air ducts for batteries, which realizes intelligent control of battery temperature through the cooperation of air duct systems, intelligent control systems and air circulation systems, and has the advantages of high efficiency, intelligence, safety and reliability, and is suitable for various battery pack application scenarios that require thermal balance management. It can also automatically adjust the temperature control strategy according to seasonal changes and long-term trends in ambient temperature to achieve long-term and effective temperature balance.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery box temperature balancing device, characterized in that: It includes a cabinet and a controller arranged in the cabinet, a temperature control host, an internal circulation pipe with gas, liquid or other carriers flowing inside, and at least two battery boxes. The controller is communicatively connected to the temperature control host. The temperature control host has a first inlet and a first outlet. The internal circulation pipe includes a first pipe for transporting the refrigerant carrier or heat medium carrier generated by the temperature control host to each of the battery boxes through the first outlet and a second pipe for transporting the refrigerant carrier or heat medium carrier after cooling or heating each of the battery boxes to the first inlet. A carrier channel for the circulation of the refrigerant carrier or heat medium carrier is provided in the battery box. The first outlet, the first pipe, the carrier channel, the second pipe, and the first inlet form a loop.

2. The battery box temperature balancing device according to claim 1, characterized in that: The carrier channel has a second inlet and a second outlet. A plurality of diversion pipes are provided on the first pipe and the second pipe. Each diversion pipe on the first pipe is respectively connected to each second inlet, and each diversion pipe on the second pipe is respectively connected to each second outlet.

3. The battery box temperature balancing device according to claim 2, characterized in that: A temperature control slave is also provided in each battery box. Each temperature control slave is electrically connected to the corresponding second inlet and second outlet, so that the opening and closing of the second inlet and the second outlet can be adjusted by the temperature control slave.

4. The battery box temperature balancing device according to claim 3, characterized in that: The controller is used to control the temperature-controlled slave machine to open the corresponding second inlet when the temperature in each battery box exceeds a first preset value through the temperature-controlled slave machine, so that the temperature-controlled host machine can transport a refrigerant carrier to the carrier channel of each battery box to cool down each battery box; and is used to control the temperature-controlled slave machine to open the corresponding second outlet when the temperature in each battery box passes through the temperature-controlled slave machine and is lower than a second preset value, so that the temperature-controlled host machine can transport a heat carrier to the carrier channel of the battery box to heat each battery box.

Images