Battery cabinet control method and device, computer equipment and readable storage medium

Abstract

The invention provides a battery cabinet control method and device, computer equipment and a readable storage medium. The control method of the battery cabinet comprises the following steps: acquiring an internal environment temperature of the battery cabinet and a charging rate or a discharging rate of the battery cabinet; according to the internal environment temperature and the charging multiplying power or the discharging multiplying power, the refrigeration starting condition of a direct cooling unit of the battery cabinet is determined; and when the refrigeration starting condition is met, the direct cooling unit is controlled to start refrigeration. According to the battery cabinet control method and device, the computer equipment and the readable storage medium provided by the invention, the temperature rise of the battery cabinet can be effectively controlled.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a control method, device, computer equipment, and readable storage medium for a battery cabinet. Background Art

[0002] With the development of new energy technologies, the application of battery cabinets in new energy, photovoltaic, and power stations has increased. This has also placed higher demands on battery cabinet performance and reliability. If the temperature rise of the battery cabinet is not properly controlled, it can at best shorten the battery cabinet lifespan and at worst lead to risks such as thermal runaway. Therefore, how to effectively control the temperature rise of the battery cabinet has gradually become a key focus of battery cabinet research. Summary of the Invention

[0003] Based on this, it is necessary to provide a control method, device, computer equipment and readable storage medium for a battery cabinet that can effectively control the temperature rise of the battery cabinet to address the above problems.

[0004] A method for controlling a battery cabinet, comprising:

[0005] Obtaining the internal ambient temperature of the battery cabinet and the charge rate or discharge rate of the battery cabinet;

[0006] Determining a cooling start-up condition of a direct cooling unit of the battery cabinet according to the internal ambient temperature and the charge rate or the discharge rate;

[0007] When the refrigeration start-up condition is met, the direct cooling unit is controlled to start refrigeration.

[0008] In some embodiments, determining the cooling start-up condition of the direct cooling unit of the battery cabinet according to the internal ambient temperature and the charge rate or the discharge rate includes:

[0009] When the internal ambient temperature is greater than the first ambient temperature threshold, and the charge rate or the discharge rate is greater than the first charge / discharge rate, the refrigeration start condition is determined to be: the first maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the second maximum temperature threshold, and / or the first average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the second average temperature threshold;

[0010] When the second charge / discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge / discharge rate, the refrigeration start condition is determined as follows: the second maximum temperature threshold is less than or equal to the maximum temperature value of the battery cabinet temperature samples is less than or equal to the third maximum temperature threshold, and / or the second average temperature threshold is less than or equal to the average temperature value of the battery cabinet temperature samples is less than or equal to the third average temperature threshold;

[0011] When the charge rate or the discharge rate is less than the second charge and discharge rate, the refrigeration start condition is determined as: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature sampling is less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature sampling is less than the fourth average temperature threshold.

[0012] In some embodiments, determining the cooling start-up condition of the direct cooling unit of the battery cabinet based on the internal ambient temperature and the charge rate or the discharge rate further includes:

[0013] When the second ambient temperature threshold ≤ the internal ambient temperature ≤ the first ambient temperature threshold, and the charge rate or the discharge rate is greater than the first charge and discharge rate, the refrigeration start condition is determined as follows: the second maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature samples ≤ the third maximum temperature threshold, and / or the second average temperature threshold ≤ the average temperature value of the battery cabinet temperature samples ≤ the third average temperature threshold;

[0014] When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the refrigeration start condition is determined as follows: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the fourth average temperature threshold;

[0015] When the charge rate or the discharge rate is less than the second charge and discharge rate, the refrigeration start condition is determined as: the fourth maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the fifth maximum temperature value, and / or the fourth average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the fifth average temperature threshold.

[0016] In some embodiments, determining the cooling start-up condition of the direct cooling unit of the battery cabinet based on the internal ambient temperature and the charge rate or the discharge rate further includes:

[0017] When the internal ambient temperature is less than the second ambient temperature threshold, and the charge rate or the discharge rate is greater than the first charge / discharge rate, determining that the refrigeration start condition is: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the fourth average temperature threshold;

[0018] When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the refrigeration start condition is determined as follows: the fourth maximum temperature threshold is less than or equal to the maximum temperature value of the battery cabinet temperature samples and less than or equal to the fifth maximum temperature value, and / or the fourth average temperature threshold is less than or equal to the average temperature value of the battery cabinet temperature samples and less than or equal to the fifth average temperature threshold;

[0019] When the charge rate or the discharge rate is less than the second charge and discharge rate, the refrigeration start condition is determined as: the maximum temperature value of the battery cabinet temperature sampling is greater than the fifth maximum temperature value, and / or the average temperature value of the battery cabinet temperature sampling is greater than the fifth average temperature threshold.

[0020] In some embodiments, the further step includes determining or setting the required opening of the expansion valve after the direct cooling unit is started;

[0021] When the charge rate or the discharge rate is greater than the first charge / discharge rate, the required opening of the expansion valve is greater than the first opening;

[0022] When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the second opening degree is less than or equal to the required opening degree of the expansion valve and less than or equal to the first opening degree;

[0023] When the charge rate or the discharge rate is less than the second charge and discharge rate, the required opening degree of the expansion valve is less than the second opening degree.

[0024] In some embodiments, the method further includes determining or setting the required speed of the compressor of the direct cooling unit after direct cooling is started;

[0025] When the charging rate or the discharging rate is greater than the first charging and discharging rate, the required speed of the compressor is greater than the first speed;

[0026] When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the second speed is less than or equal to the speed required by the compressor and less than or equal to the first speed;

[0027] When the charging rate or the discharging rate is less than the second charging and discharging rate, the required rotational speed of the compressor is less than the second rotational speed.

[0028] In some embodiments, the first ambient temperature is one of 40°C, 41°C and 42°C; the second ambient temperature is one of 20°C, 21°C, 22°C, 23°C, 24°C and 25°C; and / or,

[0029] The first charge-discharge rate is one of 0.7, 0.8 and 0.9, and the second charge-discharge rate is one of 0.4, 0.5 and 0.6; and / or,

[0030] The first maximum temperature threshold is one of 28°C, 29°C, 30°C, 31°C and 32°C, the second maximum temperature threshold is one of 33°C and 34°C, the third maximum temperature threshold is one of 36°C, 37°C and 38°C, the fourth maximum temperature threshold is one of 39°C and 40°C, and the fifth maximum temperature threshold is one of 41°C and 42°C; and / or,

[0031] The first average temperature threshold is one of 25°C, 26°C, 27°C, 28°C and 29°C, the second average temperature threshold is one of 30°C and 31°C, the third average temperature threshold is one of 32°C, 33°C, 34°C and 35°C, the fourth average temperature threshold is one of 36°C, 37°C and 38°C, and the fifth average temperature threshold is one of 39°C and 40°C.

[0032] A control device for a battery cabinet, comprising:

[0033] An acquisition module, configured to acquire the internal ambient temperature of the battery cabinet and the charge rate or discharge rate of the battery cabinet;

[0034] a determination module, configured to determine a refrigeration start-up condition of the direct cooling unit of the battery cabinet according to the internal ambient temperature and the charge rate or the discharge rate;

[0035] The control module is used to control the direct cooling unit to start refrigeration when the refrigeration start-up condition is met.

[0036] A computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the battery cabinet control method described in any one of the above embodiments when executing the computer program.

[0037] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the battery cabinet control method described in any one of the above embodiments.

[0038] The control method, device, computer equipment, and readable storage medium described above enable the control device to determine the real-time temperature inside the battery cabinet based on the internal ambient temperature and the charge or discharge rate. Based on this real-time temperature, the control device selects and determines cooling activation conditions that match the real-time conditions. When the cooling activation conditions are met, the control device controls the direct cooling unit to activate cooling, ensuring that the refrigerant efficiency of the direct cooling unit matches the real-time conditions. This achieves effective temperature control and temperature rise control, preventing thermal runaway caused by excessively rapid and large temperature rises. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a flow chart of a method for controlling a battery cabinet in one embodiment of the present application;

[0040] Figure 2 This is a flow chart of a control method for a battery cabinet in another embodiment of the present application;

[0041] Figure 3 This is a flow chart of a control method for a battery cabinet in another embodiment of the present application;

[0042] Figure 4 This is a flow chart of a method for controlling a battery cabinet in yet another embodiment of the present application;

[0043] Figure 5 This is a module diagram of a control device for a battery cabinet in one embodiment of the present application.

[0044] 10. Acquisition module; 20. Determination module; 30. Control module. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0051] With the development of new energy technologies, the application of battery cabinets in new energy, photovoltaic, and power stations has increased. This has also placed higher demands on battery cabinet performance and reliability. If the temperature rise of the battery cabinet is not properly controlled, it can at best shorten the battery cabinet lifespan and at worst lead to risks such as thermal runaway. Therefore, how to effectively control the temperature rise of the battery cabinet has gradually become a key focus of battery cabinet research.

[0052] See also Figure 1 In order to alleviate the above problems, the present application provides a battery cabinet control method, which includes the following steps:

[0053] S100: Acquire the internal ambient temperature of the battery cabinet and the charge rate or discharge rate of the battery cabinet;

[0054] A battery cabinet consists of a cabinet body, a direct cooling unit, and multiple battery packs. The cabinet body has a storage cavity, within which the direct cooling unit and all battery packs are located. The internal ambient temperature of the battery cabinet refers to the temperature of the space in the storage cavity not occupied by the direct cooling unit and battery packs. The internal ambient temperature of the battery cabinet is affected by the external ambient temperature of the battery cabinet.

[0055] The battery cabinet also includes an ambient temperature sensor and a control device. The ambient temperature sensor is electrically connected to the control device. The ambient temperature sensor is used to collect the internal ambient temperature of the battery cabinet and feed it back to the control device so that the control device can obtain the internal ambient temperature of the battery cabinet.

[0056] The battery cabinet also includes one of a Hall effect current sensor and a magnetostrictive current sensor. The Hall effect current sensor or the magnetostrictive current sensor is electrically connected to the control device. The Hall effect current sensor or the magnetostrictive current sensor collects the charging current or the discharging current of the battery cabinet and feeds it back to the control device. The control device can obtain the charging rate of the battery cabinet based on the charging current of the battery cabinet, and can obtain the discharge rate of the battery cabinet based on the discharge current of the battery cabinet.

[0057] When the battery cabinet is charging, the control device obtains the battery cabinet's charge rate. When the battery cabinet is discharging, the control device obtains the battery cabinet's discharge rate. Whether the battery cabinet is charging or discharging, the battery packs in the battery cabinet release heat, and the battery cabinet needs to regulate its temperature.

[0058] S200: Determine the cooling start-up conditions of the direct cooling unit of the battery cabinet based on the internal ambient temperature and the charge rate or discharge rate;

[0059] S300: When the cooling start conditions are met, the direct cooling unit is controlled to start cooling.

[0060] The battery pack includes a direct cooling plate and a battery cell module in contact with the direct cooling plate. The battery cell module is composed of multiple battery cells. The direct cooling plate of each battery pack is connected to the direct cooling unit to form a loop for the circulation of refrigerant.

[0061] The direct cooling unit consists of a compressor, condenser, and expansion valve. The compressor compresses the refrigerant into a high-temperature, high-pressure gaseous refrigerant, which is then transported to the condenser. The high-temperature, high-pressure gaseous refrigerant releases heat at the condenser and condenses into a room-temperature, high-pressure liquid-phase refrigerant. The liquid-phase refrigerant then passes through the expansion valve, where it is throttled down to a low-temperature, low-pressure liquid-phase refrigerant, which is then output by the direct cooling unit. The liquid-phase refrigerant then enters the direct cooling plate of each battery pack, absorbing heat from the battery cell modules. This forms a gas-liquid two-phase refrigerant, which is then output by the direct cooling plate of each battery pack and ultimately returns to the direct cooling unit for a new cycle. The refrigerant's heat absorption lowers the temperature of the battery cell modules, achieving temperature control.

[0062] The control device is electrically connected to the compressor and expansion valve. It controls the compressor's on / off switching and adjusts its speed. It also controls the expansion valve's on / off switching and adjusts its opening degree. When the control device starts the compressor and opens the expansion valve, the direct cooling unit begins cooling.

[0063] Based on the internal ambient temperature and the charge or discharge rate, the control device can determine the real-time temperature inside the battery cabinet. Based on this real-time condition, it selects and determines the cooling start-up conditions that match the real-time conditions. When the cooling start-up conditions are met, the control device controls the direct cooling unit to start cooling, ensuring that the refrigerant efficiency of the direct cooling unit matches the real-time conditions. This achieves effective temperature control and temperature rise control, preventing thermal runaway caused by excessive and rapid temperature rise.

[0064] Please refer again Figure 1 , and also see Figure 2 In some embodiments, step S200: determining the cooling start-up conditions of the direct cooling unit of the battery cabinet according to the internal ambient temperature and the charge rate or discharge rate includes:

[0065] Step S210: When the internal ambient temperature is greater than the first ambient temperature threshold, and the charge rate or discharge rate is greater than the first charge / discharge rate, determining that the cooling start condition is: the first maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the second maximum temperature threshold, and / or the first average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the second average temperature threshold;

[0066] That is, when the internal ambient temperature is in the first ambient temperature range, and the charge rate or discharge rate is in the first charge and discharge rate range, when the maximum temperature value of the battery cabinet temperature sampling is in the first maximum temperature range of the battery cabinet temperature sampling, and / or when the average temperature value of the battery cabinet temperature sampling is in the first average temperature range of the battery cabinet temperature sampling, cooling is started.

[0067] It can be understood that the first ambient temperature interval is specifically (first ambient temperature threshold, +∞), the first charge and discharge rate interval is specifically (first charge and discharge rate, +∞), the first maximum temperature interval is specifically (first maximum temperature threshold, second maximum temperature threshold), and the first average temperature interval is specifically (first average temperature threshold, second average temperature threshold). As an example, the first ambient temperature threshold is ≥40°C, such as the first ambient temperature is one of 40°C, 41°C, and 42°C; when the internal ambient temperature is greater than the first ambient temperature threshold, it means that the internal ambient temperature is high. It can be seen that the first ambient temperature interval is a high temperature ambient temperature interval.

[0068] The internal environment of the battery cabinet is the same as the external environment, and the internal temperature reflects the external temperature. A higher internal temperature indicates a high external temperature and a relatively harsh external environment for the battery cabinet. Battery cabinet temperature control is affected by the external and internal temperatures, as well as the heat released by the battery cell modules.

[0069] For example, the first charge / discharge rate is ≥ 0.7, such as one of 0.7, 0.8, and 0.9. When the charge rate or discharge rate is greater than the first charge / discharge rate, the battery pack generates more heat per unit time. Therefore, the first charge / discharge rate range is a high charge / discharge rate range.

[0070] The second maximum temperature threshold is greater than the first maximum temperature threshold, and the second average temperature threshold is greater than the first average threshold. As an example, 28°C ≤ the first maximum temperature threshold ≤ 32°C, such as when the first maximum temperature threshold is one of 28°C, 29°C, 30°C, 31°C, and 32°C. 32°C < the second maximum temperature threshold < 35°C, such as when the second maximum temperature threshold is one of 33°C and 34°C. 25°C ≤ the first average temperature threshold ≤ 29°C, such as when the first average temperature threshold is one of 25°C, 26°C, 27°C, 28°C, and 29°C. 29°C < the second average temperature threshold < 32°C, such as when the second average temperature threshold is one of 30°C and 31°C. Thus, the first maximum temperature interval and the first average temperature interval are both lower temperature intervals.

[0071] Step S220: When the internal ambient temperature is greater than the first ambient temperature threshold, and the second charge and discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge and discharge rate, the cooling start condition is determined to be: the second maximum temperature threshold is less than or equal to the maximum temperature value of the battery cabinet temperature sampling is less than or equal to the third maximum temperature threshold, and / or the second average temperature threshold is less than or equal to the average temperature value of the battery cabinet temperature sampling is less than or equal to the third average temperature threshold.

[0072] That is, when the internal ambient temperature is in the first ambient temperature range and the charge rate or discharge rate is in the second charge and discharge rate range, the maximum temperature value of the battery cabinet temperature sampling is in the second maximum temperature range of the battery cabinet temperature sampling, and / or the average temperature value of the battery cabinet temperature sampling is in the second average temperature range of the battery cabinet temperature sampling, cooling is started.

[0073] Among them, the upper limit value of the second charge and discharge rate range is less than or equal to the lower limit value of the first charge and discharge rate range, the lower limit value of the second maximum temperature range of the battery cabinet temperature sampling is greater than or equal to the upper limit value of the first maximum temperature range of the battery cabinet temperature sampling, and the lower limit value of the second average temperature range of the battery cabinet temperature sampling is greater than or equal to the upper limit value of the first average temperature range of the battery cabinet temperature sampling.

[0074] It can be understood that the second charge and discharge rate interval is specifically [second charge and discharge rate, first charge and discharge rate], the second maximum temperature interval is specifically [second maximum temperature threshold, third maximum temperature threshold], and the second average temperature interval is specifically [second average temperature threshold, third average temperature threshold].

[0075] The second charge / discharge rate is less than the first charge / discharge rate. 0.4 ≤ the second charge / discharge rate is less than 0.7, for example, the second charge / discharge rate is one of 0.4, 0.5, and 0.6. When the second charge / discharge rate is less than the charge rate or the discharge rate is less than the first charge / discharge rate, the heat generated per unit time by the battery pack is moderate. Therefore, the second charge / discharge rate range is a moderate charge / discharge rate range.

[0076] The third maximum temperature threshold is greater than the second maximum temperature threshold, and the third average temperature threshold is greater than the second average temperature threshold. For example, 35°C ≤ the third maximum temperature threshold ≤ 38°C, such as when the third maximum temperature threshold is one of 36°C, 37°C, and 38°C. For example, 32°C ≤ the third average temperature threshold ≤ 35°C, such as when the third average temperature threshold is one of 32°C, 33°C, 34°C, and 35°C. Thus, the second maximum temperature interval and the second average temperature interval are both moderate temperature intervals.

[0077] Step S230: When the internal ambient temperature is greater than the first ambient temperature threshold and the charge rate or discharge rate is less than the second charge / discharge rate, the cooling start condition is determined to be: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the fourth average temperature threshold. Specifically, when the internal ambient temperature is within the first ambient temperature range and the charge rate or discharge rate is within the third charge / discharge rate range, cooling is initiated when the maximum temperature value of the battery cabinet temperature samples is within the third maximum temperature range of the battery cabinet temperature samples and / or when the average temperature value of the battery cabinet temperature samples is within the third average temperature range of the battery cabinet temperature samples.

[0078] Among them, the upper limit value of the third charge and discharge rate range is less than or equal to the lower limit value of the second charge and discharge rate range, the lower limit value of the third maximum temperature range of the battery cabinet temperature sampling is greater than or equal to the upper limit value of the second maximum temperature range of the battery cabinet temperature sampling, and the lower limit value of the third average temperature range of the battery cabinet temperature sampling is greater than or equal to the upper limit value of the second average temperature range of the battery cabinet temperature sampling.

[0079] It can be understood that the third charge and discharge rate interval is specifically (-∞, second charge and discharge rate), the third maximum temperature interval is specifically (third maximum temperature threshold, fourth maximum temperature threshold), and the third average temperature interval is specifically (third average temperature threshold, fourth average temperature threshold).

[0080] When the charge rate or discharge rate is less than the second charge / discharge rate, the heat generated by the battery pack per unit time is less. Therefore, it can be seen that the third charge / discharge rate range is a low charge / discharge rate range.

[0081] The fourth maximum temperature threshold is greater than the third maximum temperature threshold. For example, 39°C ≤ the fourth maximum temperature threshold ≤ 40°C, such as when the fourth maximum temperature threshold is between 39°C and 40°C. The fourth average temperature threshold is greater than the third average temperature threshold. For example, 35°C < the fourth average temperature threshold < 39°C, such as when the fourth average temperature threshold is between 36°C, 37°C, and 38°C. Thus, the third maximum temperature interval and the third average temperature interval are both relatively high temperature intervals.

[0082] As an example, the temperature difference between the third maximum temperature interval of the battery cabinet temperature sampling and the second maximum temperature interval of the battery cabinet temperature sampling is the same, that is, the difference between the fourth maximum temperature threshold and the third maximum temperature threshold is equal to the difference between the third maximum temperature threshold and the second maximum temperature threshold. As an example, the temperature difference between the third average temperature interval of the battery cabinet temperature sampling and the second average temperature interval of the battery cabinet temperature sampling is the same, that is, the difference between the fourth average temperature threshold and the third average temperature threshold is equal to the difference between the third average temperature threshold and the second average temperature threshold.

[0083] The maximum temperature value of the battery cabinet temperature sampling is the maximum value of the temperature samplings of all battery packs in the battery cabinet; the average temperature value of the battery cabinet temperature sampling is the average value of the temperature samplings of all battery packs in the battery cabinet.

[0084] As an example, the maximum temperature value and the average temperature value of the battery cabinet temperature sampling are both collected through the negative temperature coefficient thermistor in the battery pack of the battery cabinet. Negative temperature coefficient thermistors (commonly known as NTC thermistors) have high temperature acquisition sensitivity and more accurate temperature acquisition. In addition, negative temperature coefficient thermistors have stable performance and can stably collect temperature in both high and low temperature environments. With this design, the battery cabinet control device can accurately adjust the temperature according to real-time conditions to effectively control temperature rise.

[0085] For example, consider a battery cabinet containing eight battery packs, each containing a 52-cell module, and 26 negative temperature coefficient (NTC) thermistors within each battery pack. Each NTC thermistor corresponds to each of the 26 cells within the battery pack. The NTC thermistors are used to collect the temperatures of the corresponding cells and are electrically connected to a control device, which then feeds the collected temperatures back to the control device. The eight battery packs in the battery cabinet then feed back a total of 208 temperature data points to the control device. The control device selects the maximum value of these 208 temperature data points as the maximum temperature value for the battery cabinet temperature sampling and averages these 208 temperature data points as the average temperature value for the battery cabinet temperature sampling.

[0086] Regardless of whether the battery cabinet is charging or discharging, the time it takes for the battery cells in the battery pack to reach the first, second, third, and fourth maximum temperature thresholds gradually increases. The time it takes for the battery cells in the battery pack to reach the first, second, third, and fourth average temperature thresholds gradually increases. In other words, regardless of whether the battery cabinet is charging or discharging, the longer it takes for the battery cells in the battery pack to reach a higher temperature range, the later the direct cooling unit will start.

[0087] When the internal ambient temperature is within the first ambient temperature range, if the charge rate or the discharge rate is within the first charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is within the first maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is within the first average temperature range of the battery cabinet temperature sampling; if the charge rate or the discharge rate is within the second charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is within the second maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is within the second average temperature range of the battery cabinet temperature sampling; if the charge rate or the discharge rate is within the third charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is within the third maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is within the third average temperature range of the battery cabinet temperature sampling.

[0088] It can be seen from this that at the same internal ambient temperature, the higher the charge rate or discharge rate, the more immediate cooling will be activated when the battery cell heats up to a lower temperature range. In other words, the higher the charge rate or discharge rate, the faster the cooling will be activated. As the charge rate or discharge rate decreases, cooling will not be activated until the battery cell heats up to a higher temperature range. The lower the charge rate or discharge rate, the slower the cooling will be activated. In this way, the time to start the direct cooling unit can be controlled according to real-time conditions, thereby achieving good temperature control and temperature rise control while also reducing energy consumption.

[0089] Please continue reading Figure 1 and Figure 2 In some embodiments, step S200 further includes:

[0090] Step S240: When the second ambient temperature threshold ≤ the internal ambient temperature ≤ the first ambient temperature threshold, and the charge rate or discharge rate is greater than the first charge and discharge rate, the cooling start condition is determined to be: the second maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the third maximum temperature threshold, and / or the second average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the third average temperature threshold.

[0091] That is, when the internal ambient temperature is in the second ambient temperature range and the charge rate or discharge rate is in the first charge and discharge rate range, the maximum temperature value of the battery cabinet temperature sampling is in the second maximum temperature range of the battery cabinet temperature sampling, and / or the average temperature value of the battery cabinet temperature sampling is in the second average temperature range of the battery cabinet temperature sampling, cooling is started.

[0092] It can be understood that the second ambient temperature threshold is less than the first ambient temperature threshold. The second ambient temperature interval is specifically [second ambient temperature threshold, first ambient temperature threshold]. As an example, 20°C ≤ second ambient temperature threshold ≤ 25°C, such as the second ambient temperature threshold is one of 20°C, 21°C, 22°C, 23°C, 24°C, and 25°C. Therefore, it can be seen that the second ambient temperature interval is a moderate ambient temperature interval. When the second ambient temperature threshold ≤ internal ambient temperature ≤ first ambient temperature threshold, it means that both the internal and external ambient temperatures of the battery cabinet are moderate.

[0093] Step S250: When the second ambient temperature threshold ≤ internal ambient temperature ≤ first ambient temperature threshold, and the second charge and discharge rate ≤ charge rate or discharge rate ≤ first charge and discharge rate, the cooling start condition is determined to be: the third maximum temperature threshold < the maximum temperature value of the battery cabinet temperature sampling < the fourth maximum temperature threshold, and / or the third average temperature threshold < the average temperature value of the battery cabinet temperature sampling < the fourth average temperature threshold.

[0094] That is, when the internal ambient temperature is in the second ambient temperature range and the charge rate or discharge rate is in the second charge and discharge rate range, when the maximum temperature value of the battery cabinet temperature sampling is in the third maximum temperature range of the battery cabinet temperature sampling, and / or when the average temperature value of the battery cabinet temperature sampling is in the third average temperature range of the battery cabinet temperature sampling, cooling is started.

[0095] Step S260: When the second ambient temperature threshold ≤ internal ambient temperature ≤ first ambient temperature threshold, and the charge rate or discharge rate < second charge / discharge rate, the cooling start condition is determined to be: the fourth maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the fifth maximum temperature value, and / or the fourth average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the fifth average temperature threshold.

[0096] That is, when the internal ambient temperature is within the second ambient temperature range and the charge rate or discharge rate is within the third charge / discharge rate range, cooling is initiated when the maximum temperature value of the battery cabinet temperature sampling is within the fourth maximum temperature range of the battery cabinet temperature sampling, and / or when the average temperature value of the battery cabinet temperature sampling is within the fourth average temperature range of the battery cabinet temperature sampling. The lower limit value of the fourth maximum temperature range of the battery cabinet temperature sampling is greater than or equal to the upper limit value of the third maximum temperature range of the battery cabinet temperature sampling, and the lower limit value of the fourth average temperature range of the battery cabinet temperature sampling is greater than or equal to the upper limit value of the third average temperature range of the battery cabinet temperature sampling.

[0097] It can be understood that the fifth maximum temperature threshold is greater than the fourth maximum temperature threshold, and the fifth average temperature threshold is greater than the fourth average temperature threshold. The fourth maximum temperature interval is specifically [fourth maximum temperature threshold, fifth maximum temperature threshold], and the fourth average temperature interval is specifically [fourth average temperature threshold, fifth average temperature threshold]. This shows that the fourth maximum temperature interval and the fourth average temperature interval are both higher temperature intervals. As an example, 41°C ≤ fifth maximum temperature threshold ≤ 42°C, such as the fifth maximum temperature threshold is one of 41°C and 42°C. The fifth maximum temperature threshold is greater than the fourth maximum temperature threshold, 39°C ≤ fifth average temperature threshold ≤ 40°C, such as the fifth average temperature threshold is one of 39°C and 40°C.

[0098] Regardless of whether the battery cabinet is in the charging or discharging state, the time it takes for the battery cells in the battery pack to reach the fifth maximum temperature threshold is longer than the time it takes to reach the fourth maximum temperature threshold, and the time it takes for the battery cells in the battery pack to reach the fifth average temperature threshold is longer than the time it takes to reach the fourth average temperature threshold.

[0099] When the internal ambient temperature is in the second ambient temperature range, if the charge rate or the discharge rate is in the first charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is in the second maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is in the second average temperature range of the battery cabinet temperature sampling; if the charge rate or the discharge rate is in the second charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is in the third maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is in the third average temperature range of the battery cabinet temperature sampling; if the charge rate or the discharge rate is in the third charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is in the fourth maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is in the fourth average temperature range of the battery cabinet temperature sampling.

[0100] This shows that, at the same internal ambient temperature, the higher the charge or discharge rate, the faster the cooling starts. As the charge or discharge rate decreases, cooling starts only when the battery cell temperature reaches a higher temperature range. The lower the charge or discharge rate, the slower the cooling starts. In this way, the timing of starting the direct cooling unit can be controlled according to real-time conditions, thereby achieving good temperature control and temperature rise control while also reducing energy consumption.

[0101] When the charge rate or discharge rate is within the first charge / discharge rate range, if the internal ambient temperature is within the first ambient temperature range, cooling is initiated when the maximum temperature value of the battery cabinet temperature sampling is within the first maximum temperature range of the battery cabinet temperature sampling, and / or when the average temperature value of the battery cabinet temperature sampling is within the first average temperature range of the battery cabinet temperature sampling. If the internal ambient temperature is within the second ambient temperature range, cooling is initiated when the maximum temperature value of the battery cabinet temperature sampling is within the second maximum temperature range of the battery cabinet temperature sampling, and / or when the average temperature value of the battery cabinet temperature sampling is within the second average temperature range of the battery cabinet temperature sampling. Thus, at the same charge rate or discharge rate, the higher the internal ambient temperature, the faster cooling is initiated. As the internal ambient temperature decreases, cooling is not initiated until the battery cell temperature rises to a higher temperature range. The lower the internal ambient temperature, the slower cooling is initiated. In this manner, the timing of activating the direct cooling unit can be controlled based on real-time conditions, thereby achieving good temperature control and temperature rise control while also reducing energy consumption.

[0102] Similarly, based on the refrigeration start-up conditions when the charge rate or discharge rate is within the second charge and discharge rate range and the internal ambient temperature is respectively within the first ambient temperature range and the second ambient temperature range, and based on the refrigeration start-up conditions when the charge rate or discharge rate is within the third charge and discharge rate range and the internal ambient temperature is respectively within the first ambient temperature range and the second ambient temperature range, it can be deduced that at the same charge rate or discharge rate, the higher the internal ambient temperature, the faster the refrigeration starts.

[0103] Please refer again Figure 1 and Figure 2 In some embodiments, step S200 further includes:

[0104] Step S270: When the internal ambient temperature is less than the second ambient temperature threshold, and the charge rate or discharge rate is greater than the first charge / discharge rate, determining that the cooling start condition is: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the fourth average temperature threshold;

[0105] That is, when the internal ambient temperature is in the third ambient temperature range, and the charge rate or discharge rate is in the first charge and discharge rate range, when the maximum temperature value of the battery cabinet temperature sampling is in the third maximum temperature range of the battery cabinet temperature sampling, and / or when the average temperature value of the battery cabinet temperature sampling is in the third average temperature range of the battery cabinet temperature sampling, cooling is started. It can be understood that the third ambient temperature range is specifically (-∞, the second ambient temperature threshold). The second ambient temperature range is a lower ambient temperature range.

[0106] Step S280: When the internal ambient temperature is less than the second ambient temperature threshold, and the second charge / discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge / discharge rate, determining that the cooling start condition is: the fourth maximum temperature threshold is less than or equal to the maximum temperature value of the battery cabinet temperature samples and less than or equal to the fifth maximum temperature value, and / or the fourth average temperature threshold is less than or equal to the average temperature value of the battery cabinet temperature samples and less than or equal to the fifth average temperature threshold;

[0107] That is, when the internal ambient temperature is in the third ambient temperature range and the charge rate or discharge rate is in the second charge and discharge rate range, the maximum temperature value of the battery cabinet temperature sampling is in the fourth maximum temperature range of the battery cabinet temperature sampling, and / or the average temperature value of the battery cabinet temperature sampling is in the fourth average temperature range of the battery cabinet temperature sampling, cooling is started.

[0108] Step S290: When the internal ambient temperature is less than the second ambient temperature threshold, and the charge rate or discharge rate is less than the second charge and discharge rate, the cooling start condition is determined to be: the maximum temperature value of the battery cabinet temperature sampling is greater than the fifth maximum temperature value, and / or the average temperature value of the battery cabinet temperature sampling is greater than the fifth average temperature threshold.

[0109] That is, when the internal ambient temperature is in the third ambient temperature range and the charge rate or discharge rate is in the third charge and discharge rate range, when the maximum temperature value of the battery cabinet temperature sampling is in the fifth maximum temperature range of the battery cabinet temperature sampling, and / or when the average temperature value of the battery cabinet temperature sampling is in the fifth average temperature range of the battery cabinet temperature sampling, cooling is started.

[0110] It can be understood that the fifth maximum temperature interval is specifically (fifth maximum temperature threshold, +∞), and the fifth average temperature interval is specifically (fifth average temperature threshold, +∞). Both the fifth maximum temperature interval and the fifth average temperature interval are high temperature intervals.

[0111] When the internal ambient temperature is in the third ambient temperature range, if the charge rate or discharge rate is in the first charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is in the third maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is in the third average temperature range of the battery cabinet temperature sampling; if the charge rate or discharge rate is in the second charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is in the fourth maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is in the fourth average temperature range of the battery cabinet temperature sampling; if the charge rate or discharge rate is in the third charge and discharge rate range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is in the fifth maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is in the fifth average temperature range of the battery cabinet temperature sampling.

[0112] This shows that, at the same internal ambient temperature, the higher the charge or discharge rate, the faster the cooling starts. As the charge or discharge rate decreases, cooling only starts when the battery cell temperature reaches the high temperature range. The lower the charge or discharge rate, the slower the cooling starts. In this way, the timing of starting the direct cooling unit can be controlled according to real-time conditions, thereby achieving good temperature control and temperature rise control while also reducing energy consumption.

[0113] When the charge rate or discharge rate is within the first charge and discharge rate range, if the internal ambient temperature is within the second ambient temperature range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is within the second maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is within the second average temperature range of the battery cabinet temperature sampling; if the internal ambient temperature is within the third ambient temperature range, cooling is started when the maximum temperature value of the battery cabinet temperature sampling is within the third maximum temperature range of the battery cabinet temperature sampling, and / or, when the average temperature value of the battery cabinet temperature sampling is within the third average temperature range of the battery cabinet temperature sampling.

[0114] This shows that at the same charge or discharge rate, the higher the internal ambient temperature, the faster the cooling starts. As the internal ambient temperature decreases, cooling starts only when the battery cell temperature reaches the high temperature range. The lower the internal ambient temperature, the slower the cooling starts. In this way, the timing of the direct cooling unit activation can be controlled according to real-time conditions, thereby achieving excellent temperature control and temperature rise control while also reducing energy consumption.

[0115] Similarly, based on the refrigeration start-up conditions when the charge rate or discharge rate is within the second charge and discharge rate range and the internal ambient temperature is respectively within the second ambient temperature range and the third ambient temperature range, and based on the refrigeration start-up conditions when the charge rate or discharge rate is within the third charge and discharge rate range and the internal ambient temperature is respectively within the second ambient temperature range and the third ambient temperature range, it can be deduced that at the same charge rate or discharge rate, the higher the internal ambient temperature, the faster the refrigeration starts.

[0116] In summary, the control method of the battery cabinet in this application can select matching refrigeration start-up conditions according to the internal ambient temperature of the battery cabinet and the charging rate or discharge rate of the battery cabinet, as the internal ambient temperature and the charging rate or discharge rate change.

[0117] See also Figure 3 In some embodiments, the control method of the battery cabinet further includes step 400: determining or setting the required opening of the expansion valve after the direct cooling unit is started; step 400 includes:

[0118] Step S410: when the charge rate or the discharge rate is greater than the first charge / discharge rate, the required opening of the expansion valve is greater than the first opening;

[0119] That is, when the charge rate or the discharge rate is in the first charge and discharge rate range, the required opening degree of the expansion valve is determined or set to be in the first opening degree range.

[0120] It can be understood that the first opening range is specifically (first opening, +∞).

[0121] Step S420: when the second charge / discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge / discharge rate, the second opening degree is less than or equal to the required opening degree of the expansion valve and less than or equal to the first opening degree;

[0122] Specifically, when the charge rate or discharge rate is within the second charge / discharge rate range, the required opening of the expansion valve is determined or set to the second opening range. The upper limit of the second opening range is less than or equal to the lower limit of the first opening range. It is understood that the second opening range is specifically [second opening, first opening].

[0123] Step S430: When the charge rate or the discharge rate is less than the second charge / discharge rate, the required opening degree of the expansion valve is less than the second opening degree.

[0124] Specifically, when the charge rate or discharge rate is within the third charge / discharge rate range, the required opening of the expansion valve is determined or set to the third opening range. The upper limit of the third opening range is less than or equal to the lower limit of the second opening range. It is understood that the third opening range is specifically (-∞, second opening).

[0125] For example, the first opening degree is ≥ 70%, such as one of 70%, 80%, and 90%. The second opening degree is ≥ 30%, such as one of 30%, 40%, 50%, and 60%. The greater the opening degree of the expansion valve, the higher the cooling efficiency of the direct cooling unit.

[0126] In this embodiment, the required expansion valve opening is determined based on the charge rate or discharge rate. After cooling is initiated, the expansion valve opening is adjusted accordingly. The higher the charge rate or discharge rate, the larger the required expansion valve opening, thereby improving the cooling efficiency of the direct cooling unit and reducing the risk of thermal runaway. As the charge rate or discharge rate decreases, the expansion valve opening gradually decreases, thereby meeting heat dissipation requirements while reducing energy consumption.

[0127] See also Figure 4 In some embodiments, the control method of the battery cabinet further includes step 500: determining or setting the required speed of the compressor of the direct cooling unit after direct cooling is started; step 500 includes:

[0128] Step 510: When the charging rate or the discharging rate is greater than the first charging or discharging rate, the required speed of the compressor is greater than the first speed;

[0129] That is, when the charging rate or the discharging rate is in the first charging and discharging rate range, the required speed of the compressor is determined or set to be in the first speed range.

[0130] It can be understood that the first speed range is specifically (first speed, +∞).

[0131] Step 520: When the second charge / discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge / discharge rate, the second speed is less than or equal to the speed required by the compressor and less than or equal to the first speed;

[0132] Specifically, when the charge rate or discharge rate is within the second charge / discharge rate range, the required compressor speed is determined or set to the second speed range. The upper limit of the second speed range is less than or equal to the lower limit of the first speed range. It is understood that the second speed range is specifically [second speed, first speed].

[0133] Step 530: When the charge rate or the discharge rate is less than the second charge / discharge rate, the required speed of the compressor is less than the second speed; and the second speed is less than the first speed.

[0134] That is: when the charging rate or the discharging rate is in the third charging and discharging rate interval, the speed required by the compressor is determined or set to the third speed interval. The upper limit value of the third speed interval is less than or equal to the lower limit value of the second speed interval. It can be understood that the third speed interval is specifically (-∞, second speed). The first speed is ≥70% of the rated speed, such as the first speed is 70% of the rated speed, 80% of the rated speed and 90% of the rated speed. The second speed is ≥30% of the rated speed, such as the second speed is 30% of the rated speed, 40% of the rated speed, 50% of the rated speed and 60% of the rated speed. The higher the speed of the compressor, the higher the cooling efficiency of the direct cooling unit.

[0135] In this embodiment, the required speed of the compressor is determined based on the charge rate or discharge rate, and after the cooling is started, the speed of the compressor is adjusted according to the required speed of the compressor. The higher the charge rate or discharge rate, the higher the required speed of the compressor, thereby improving the cooling efficiency of the direct cooling unit and reducing the risk of thermal runaway. As the charge rate or discharge rate decreases, the required speed of the compressor gradually decreases, thereby meeting the heat dissipation requirements while reducing energy consumption. Please refer to Figures 1 to 5 The present application also provides a control device for a battery cabinet, which is used to implement the control method for the battery cabinet described in any one of the above embodiments.

[0136] The battery cabinet control device includes an acquisition module 10, a determination module 20, and a control module 30. The acquisition module 10 is used to obtain the internal ambient temperature of the battery cabinet and the charge rate or discharge rate of the battery cabinet. The determination module 20 is used to determine the cooling start-up conditions of the battery cabinet's direct cooling unit based on the internal ambient temperature and the charge rate or discharge rate. The control module 30 is used to control the direct cooling unit to start cooling when the cooling start-up conditions are met.

[0137] Acquisition module 10, determination module 20, and control module 30 work together to determine the real-time temperature inside the battery cabinet based on the internal ambient temperature and the charge or discharge rate. Based on this real-time temperature, the control device selects and determines the cooling activation conditions that match the real-time conditions. When the cooling activation conditions are met, the control device controls the direct cooling unit to activate cooling, ensuring that the refrigerant efficiency of the direct cooling unit matches the real-time conditions. This achieves effective temperature control and temperature rise control, preventing thermal runaway caused by excessively rapid and large temperature rises.

[0138] In some embodiments, the determination module 20 is also used to determine that when the internal ambient temperature is greater than the first ambient temperature threshold and the charging rate or the discharging rate is greater than the first charging and discharging rate, the refrigeration start condition is: the first maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature sampling is less than the second maximum temperature threshold, and / or the first average temperature threshold is less than the average temperature value of the battery cabinet temperature sampling is less than the second average temperature threshold.

[0139] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the second maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the third maximum temperature threshold, and / or the second average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the third average temperature threshold when the second charge and discharge rate ≤ the charge rate or the discharge rate ≤ the first charge and discharge rate.

[0140] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the third maximum temperature threshold < the maximum temperature value of the battery cabinet temperature sampling < the fourth maximum temperature threshold, and / or, the third average temperature threshold < the average temperature value of the battery cabinet temperature sampling < the fourth average temperature threshold when the charging rate or discharge rate is less than the second charging and discharging rate.

[0141] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the second maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the third maximum temperature threshold, and the second average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the third average temperature threshold when the second ambient temperature threshold ≤ the internal ambient temperature ≤ the first ambient temperature threshold, and the charging rate or discharge rate > the first charging and discharging rate.

[0142] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the third maximum temperature threshold < the maximum temperature value of the battery cabinet temperature sampling < the fourth maximum temperature threshold, and the third average temperature threshold < the average temperature value of the battery cabinet temperature sampling < the fourth average temperature threshold when the second charge and discharge rate is ≤ the charge rate or the discharge rate is ≤ the first charge and discharge rate.

[0143] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the fourth maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the fifth maximum temperature value, and the fourth average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the fifth average temperature threshold when the charging rate or discharge rate is less than the second charging and discharging rate.

[0144] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the third maximum temperature threshold < the maximum temperature value of the battery cabinet temperature sampling < the fourth maximum temperature threshold, and / or the third average temperature threshold < the average temperature value of the battery cabinet temperature sampling < the fourth average temperature threshold when the internal ambient temperature is less than the second ambient temperature threshold and the charging rate or discharge rate is greater than the first charging and discharging rate.

[0145] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the fourth maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the fifth maximum temperature value, and / or the fourth average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the fifth average temperature threshold when the second charge and discharge rate ≤ the charge rate or the discharge rate ≤ the first charge and discharge rate.

[0146] In some embodiments, the determination module 20 is also used to determine that the refrigeration start condition is: the maximum temperature value of the battery cabinet temperature sampling is greater than the fifth maximum temperature value, and / or the average temperature value of the battery cabinet temperature sampling is greater than the fifth average temperature threshold when the charging rate or discharge rate is less than the second charging and discharging rate.

[0147] The division of the various modules in the control device of the above-mentioned battery cabinet is only for illustration. In other embodiments, the control device of the battery cabinet can be divided into different modules as needed to complete all or part of the functions of the control device of the above-mentioned battery cabinet.

[0148] Specific definitions of the battery cabinet control device can be found in the definitions of the battery cabinet control method in any of the above embodiments and are not further elaborated here. Each module in the battery cabinet control device described above can be implemented in whole or in part via software, hardware, or a combination thereof. Each of these modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a computer device memory in software form, allowing the processor to call and execute the corresponding operations of each module.

[0149] The present application also provides a computer device, which includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of any of the above-mentioned battery cabinet control methods are implemented.

[0150] The present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of any of the above-mentioned battery cabinet control methods are implemented.

[0151] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0152] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A control method for a battery cabinet, characterized in that: The control method of the battery cabinet includes: Obtaining the internal ambient temperature of the battery cabinet and the charge rate or discharge rate of the battery cabinet; Determining a cooling start-up condition of a direct cooling unit of the battery cabinet according to the internal ambient temperature and the charge rate or the discharge rate; When the refrigeration start-up condition is met, the direct cooling unit is controlled to start refrigeration.

2. The battery cabinet control method according to claim 1, characterized in that: The determining, based on the internal ambient temperature and the charge rate or the discharge rate, of a refrigeration start-up condition of the direct cooling unit of the battery cabinet includes: When the internal ambient temperature is greater than the first ambient temperature threshold, and the charge rate or the discharge rate is greater than the first charge / discharge rate, the refrigeration start condition is determined to be: the first maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the second maximum temperature threshold, and / or the first average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the second average temperature threshold; When the second charge / discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge / discharge rate, the refrigeration start condition is determined as follows: the second maximum temperature threshold is less than or equal to the maximum temperature value of the battery cabinet temperature samples is less than or equal to the third maximum temperature threshold, and / or the second average temperature threshold is less than or equal to the average temperature value of the battery cabinet temperature samples is less than or equal to the third average temperature threshold; When the charge rate or the discharge rate is less than the second charge and discharge rate, the refrigeration start condition is determined as: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature sampling is less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature sampling is less than the fourth average temperature threshold.

3. The control method of the battery cabinet according to claim 2, characterized in that: The determining of the cooling start-up condition of the direct cooling unit of the battery cabinet according to the internal ambient temperature and the charging rate or the discharging rate further includes: When the second ambient temperature threshold ≤ the internal ambient temperature ≤ the first ambient temperature threshold, and the charge rate or the discharge rate is greater than the first charge and discharge rate, the refrigeration start condition is determined as follows: the second maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature samples ≤ the third maximum temperature threshold, and / or the second average temperature threshold ≤ the average temperature value of the battery cabinet temperature samples ≤ the third average temperature threshold; When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the refrigeration start condition is determined as follows: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the fourth average temperature threshold; When the charge rate or the discharge rate is less than the second charge and discharge rate, the refrigeration start condition is determined as: the fourth maximum temperature threshold ≤ the maximum temperature value of the battery cabinet temperature sampling ≤ the fifth maximum temperature value, and / or the fourth average temperature threshold ≤ the average temperature value of the battery cabinet temperature sampling ≤ the fifth average temperature threshold.

4. The control method of the battery cabinet according to claim 3, characterized in that: The determining of the cooling start-up condition of the direct cooling unit of the battery cabinet according to the internal ambient temperature and the charging rate or the discharging rate further includes: When the internal ambient temperature is less than the second ambient temperature threshold, and the charge rate or the discharge rate is greater than the first charge / discharge rate, determining that the refrigeration start condition is: the third maximum temperature threshold is less than the maximum temperature value of the battery cabinet temperature samples and less than the fourth maximum temperature threshold, and / or the third average temperature threshold is less than the average temperature value of the battery cabinet temperature samples and less than the fourth average temperature threshold; When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the refrigeration start condition is determined as follows: the fourth maximum temperature threshold is less than or equal to the maximum temperature value of the battery cabinet temperature samples and less than or equal to the fifth maximum temperature value, and / or the fourth average temperature threshold is less than or equal to the average temperature value of the battery cabinet temperature samples and less than or equal to the fifth average temperature threshold; When the charge rate or the discharge rate is less than the second charge and discharge rate, the refrigeration start condition is determined as: the maximum temperature value of the battery cabinet temperature sampling is greater than the fifth maximum temperature value, and / or the average temperature value of the battery cabinet temperature sampling is greater than the fifth average temperature threshold.

5. The control method of the battery cabinet according to claim 4, characterized in that: It also includes determining or setting the required opening of the expansion valve after the direct cooling start-up of the direct cooling unit; When the charge rate or the discharge rate is greater than the first charge / discharge rate, the required opening of the expansion valve is greater than the first opening; When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the second opening degree is less than or equal to the required opening degree of the expansion valve and less than or equal to the first opening degree; When the charge rate or the discharge rate is less than the second charge and discharge rate, the required opening degree of the expansion valve is less than the second opening degree.

6. The control method of the battery cabinet according to claim 4, characterized in that: It also includes determining or setting the required speed of the compressor of the direct cooling unit after direct cooling is started; When the charging rate or the discharging rate is greater than the first charging and discharging rate, the required speed of the compressor is greater than the first speed; When the second charge-discharge rate is less than or equal to the charge rate or the discharge rate is less than or equal to the first charge-discharge rate, the second speed is less than or equal to the speed required by the compressor and less than or equal to the first speed; When the charging rate or the discharging rate is less than the second charging and discharging rate, the required rotational speed of the compressor is less than the second rotational speed.

7. The control method of the battery cabinet according to claim 4, characterized in that: The first ambient temperature is one of 40° C., 41° C., and 42° C.; the second ambient temperature is one of 20° C., 21° C., 22° C., 23° C., 24° C., and 25° C.; and / or, The first charge-discharge rate is one of 0.7, 0.8 and 0.9, and the second charge-discharge rate is one of 0.4, 0.5 and 0.6; and / or, The first maximum temperature threshold is one of 28°C, 29°C, 30°C, 31°C and 32°C, the second maximum temperature threshold is one of 33°C and 34°C, the third maximum temperature threshold is one of 36°C, 37°C and 38°C, the fourth maximum temperature threshold is one of 39°C and 40°C, and the fifth maximum temperature threshold is one of 41°C and 42°C; and / or, The first average temperature threshold is one of 25°C, 26°C, 27°C, 28°C and 29°C, the second average temperature threshold is one of 30°C and 31°C, the third average temperature threshold is one of 32°C, 33°C, 34°C and 35°C, the fourth average temperature threshold is one of 36°C, 37°C and 38°C, and the fifth average temperature threshold is one of 39°C and 40°C.

8. A control device for a battery cabinet, characterized in that: The control device of the battery cabinet includes: An acquisition module, configured to acquire the internal ambient temperature of the battery cabinet and the charge rate or discharge rate of the battery cabinet; a determination module, configured to determine a refrigeration start-up condition of the direct cooling unit of the battery cabinet according to the internal ambient temperature and the charge rate or the discharge rate; The control module is used to control the direct cooling unit to start refrigeration when the refrigeration start-up condition is met.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the battery cabinet control method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the battery cabinet control method according to any one of claims 1 to 7 are implemented.

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