Battery Temperature Control System

Abstract

To provide a battery temperature control system, which can conduct a thermal management to each battery module.SOLUTION: A battery temperature control system 1 includes a cabinet 2, an air conditioner 3, a central control module 4, and a plurality of battery modules 5. The air conditioner 3 is used to provide cold air or warm air. The central control module 4 transmits, based on the ambient temperature, a temperature controlling command to the air conditioner 3 and activates the air conditioner to provide cold air or warm air, then compares and calculates a plurality of pieces of working temperature information transmitted from the plurality of battery modules 5, and transmits a fan operation command to each battery module, thus a fan unit activates a working mode depending on the fan operation command to lower or raise the temperature of the battery modules, so as to adjust the working temperature of each battery module.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a battery temperature control system, and more particularly to a battery temperature control system capable of thermally managing each battery module. [Background technology]

[0002] Due to the wide application of lithium batteries and the increasing requirements for their voltage, the number of lithium batteries arranged in a commonly used battery cabinet easily exceeds 200 or more. Such a huge number of lithium batteries makes it difficult to control the thermal management of the batteries. Generally, a battery cabinet is installed with a number of battery modules, each of which has a number of batteries arranged in series, and these battery modules are thermally managed by an air conditioner.

[0003] The thermal management of battery modules is mainly about how to improve the temperature uniformity of the battery. In the conventional technology, the causes of uneven temperature of the battery include batteries from different production batches, different impedances of the battery itself, placement positions of the modules (placed at high and low places), uneven internal wind fields, high or low temperature in the external environment, and different exposure surfaces to sunlight. In addition, the heat generation of the battery is also dynamic in nature, so it will generate different amounts of heat according to different currents and times. These factors make the thermal management of the battery module very difficult and difficult to handle, and when many battery modules are installed in a battery cabinet at the same time, it is even more difficult to thermally manage each individual battery module one by one.

[0004] In the prior art, outdoor battery energy storage cabinets often use air conditioners for cooling, and the ambient temperature in the battery cabinet is maintained at 20-30 degrees to avoid overheating of the battery. However, the ambient temperature is not the same as the battery temperature, and the battery is wrapped in a complex battery module structure. At this time, when the temperature in the cabinet becomes locally high or low, the battery temperature in the battery module where the temperature becomes locally high or low may be too high or too low. If the temperature of a single battery becomes too high or too low and exceeds a predetermined protection value, the operation of the battery module is suspended to protect the single battery, and as a result, other batteries in the module that have normal temperatures cannot operate, and the total electrical capacity is lost.

[0005] In addition, the non-uniform temperature of the battery also indirectly affects the battery life. It can be seen that how to achieve the averaging and heat treatment of the battery temperature in the cabinet has become an important issue in the industry. Therefore, how to develop a battery temperature control system that can improve the problems faced by the above-mentioned conventional technologies is one of the important issues. Summary of the Invention [Problem to be solved by the invention]

[0006] The objective of the present invention is to provide a battery temperature control system that provides cold or hot air to the battery modules, thereby thermally managing each battery module, effectively selecting a battery module that deviates from the average value, and lowering or raising the temperature of the battery module to adjust the operating temperature of each battery module, thereby improving the consistency of the battery module temperature and improving the battery life and product reliability. [Means for solving the problem]

[0007] According to the concept of the present invention, the present invention provides a battery temperature control system including a cabinet, an air conditioner, a central control module, and a plurality of battery modules, in which the air conditioner is installed in the cabinet and used to provide cold or hot air, the central control module is installed in the cabinet and electrically connected to the air conditioner, the plurality of battery modules are electrically connected to the central control module, each battery module includes a plurality of batteries, a control unit, a fan unit, and a temperature sensing module, the plurality of batteries, the fan unit and the temperature sensing module are all electrically connected to the control unit, each battery module is respectively assembled into a housing and accommodated in the cabinet, and the temperature sensing module of each battery module detects and monitors the temperature of its corresponding battery module and transmits the detected temperature information to the central control module, the central control module transmits a temperature control command to the air conditioner according to the ambient temperature to operate the cold or hot air, and generates and transmits a fan operation command to each battery module according to the detected temperature information transmitted from the plurality of battery modules, and the fan unit of each battery module operates a corresponding operation mode according to the fan operation command, thereby decreasing or increasing the temperature of the plurality of batteries to adjust the temperature of the battery temperature control system.

[0008] According to the concept of the invention, an air conditioner comprises a cooling module and a heating module for providing cold or hot air.

[0009] According to the concept of the present invention, the temperature control command includes a first temperature control command and a second temperature control command, and when it is determined that the ambient temperature is in a high temperature state, the central control module sends the first temperature control command to the air conditioner, and when it is determined that the ambient temperature is in a low temperature state, the central control module sends the second temperature control command to the air conditioner, and when the air conditioner receives the first temperature control command, it operates a cooling module to provide cold air, and when it receives the second temperature control command, it operates a heating module to provide hot air.

[0010] According to the concept of the present invention, the detected temperature of each battery module is a first average temperature of the multiple batteries in the battery module.

[0011] According to the concept of the present invention, the central control module calculates the deviation value between the detected temperature of each battery module and the reference temperature, and generates and sends a fan operation command to each battery module according to the operating mode of the air conditioner and whether the deviation value exceeds a predetermined value. The fan unit operates the corresponding operating mode according to the fan operation command, and lowers or raises the temperature of the multiple batteries so as to respectively adjust the temperature of each battery module.

[0012] According to the concept of the present invention, the reference temperature is a second average temperature of the plurality of battery modules.

[0013] According to the concept of the present invention, the fan operation commands include a high speed operation command, a medium speed operation command and a low speed operation command.

[0014] According to the concept of the present invention, the operation modes of the fan unit include a high speed operation mode, a medium speed operation mode and a low speed operation mode. When the control unit of the battery module receives one of a high speed operation command, a medium speed operation command or a low speed operation command, the fan unit operates in the high speed operation mode, the medium speed operation mode or the low speed operation mode according to the command.

[0015] According to the concept of the present invention, when the operating mode of the air conditioner is a cooling mode, and the deviation value is positive and higher than a predetermined value, the central control module sends a high-speed operation command to the battery module, and the fan unit accordingly operates in the high-speed operation mode to reduce the temperature of the multiple batteries in the battery module, and reduce the operating temperature of the battery module.

[0016] According to the concept of the present invention, when the operating mode of the air conditioner is in cooling mode and the deviation value is negative and higher than a predetermined value, the central control module will send a low-speed operation command to the battery module, and the fan unit will operate in low-speed operation mode accordingly to reduce the cooling capacity.

[0017] According to the concept of the present invention, when the deviation value is lower than a predetermined value, the central control module sends a medium-speed operation command to the battery module, and the fan unit accordingly operates in medium-speed operation mode to maintain the temperature of the battery module.

[0018] According to the concept of the present invention, when the operating mode of the air conditioner is in the heating mode and the deviation value is positive and higher than a predetermined value, the central control module sends a low-speed operation command to the battery module, and the fan unit accordingly operates in the low-speed operation mode to reduce the heating capacity.

[0019] According to the concept of the present invention, when the operating mode of the air conditioner is a heating mode and the deviation value is negative and higher than a predetermined value, the central control module sends a high-speed operation command to the battery module, and the fan unit accordingly operates in a high-speed operation mode to heat up the multiple batteries in the battery module and increase the temperature of the battery module. [Brief description of the drawings]

[0020] [Figure 1] 1 is a system schematic diagram of a battery temperature control system according to a preferred embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a schematic structural diagram of a cabinet of the battery temperature control system shown in FIG. 1. [Diagram 3] FIG. 2 is a system schematic diagram of a central control module of the battery temperature control system shown in FIG. 1. [Figure 4] FIG. 2 is a system schematic diagram of a battery module of the battery temperature control system shown in FIG. [Diagram 5]FIG. 2 is a schematic structural diagram of a battery module of the battery temperature control system shown in FIG. 1 from a certain perspective. [Figure 6A] 6 is a schematic front view showing the structure of the battery module shown in FIG. 5 from another perspective. [Figure 6B] 6B is a schematic bottom view showing the structure of the battery module shown in FIG. 6A. [Figure 7] FIG. 6B is a schematic diagram showing the internal structure of the battery module shown in FIG. 6A. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Some exemplary embodiments illustrating the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention can have various modifications in different aspects, all without departing from the scope of the present invention, and the description and drawings are used for illustrative purposes only, and are not intended to limit the present invention.

[0022] FIG. 1 is a system schematic diagram of a battery temperature control system of a preferred embodiment of the present invention. FIG. 2 is a schematic structural diagram of a cabinet of the battery temperature control system shown in FIG. 1. FIG. 3 is a system schematic diagram of a battery module of the battery temperature control system shown in FIG. 1. As shown in FIGS. 1 and 2, the battery temperature control system 1 of the present invention includes a cabinet 2, an air conditioner 3, a central control module 4, and a plurality of battery modules 5. The air conditioner 3 is installed in the cabinet 2 and includes a cooling module 31 and a heating module 32 for providing cold air and hot air, respectively. The central control module 4 is installed in the cabinet 2 and electrically connected to the air conditioner 3. The plurality of battery modules 5 are electrically connected to the central control module 4. As shown in FIG. 4, each battery module 5 includes a plurality of batteries 51, a control unit 52, a fan unit 53, and a temperature sensing module 54, the plurality of batteries 51, the fan unit 53, and the temperature sensing module 54 are all electrically connected to the control unit 52, and each battery module 5 is respectively assembled into a housing 50 and accommodated in the cabinet 2. The temperature sensing module 54 of each battery module 5 continuously detects and monitors the operating temperature of the corresponding battery module 5, and transmits the operating temperature information to the central control module 4. The central control module 4 transmits a temperature control command to the air conditioner 3 based on the ambient temperature to operate the cold air or the hot air, and compares and calculates the operating temperature information transmitted from the battery modules 5, transmits a fan operation command to each battery module 5, and the fan unit 53 of each battery module 5 operates the operation mode accordingly, thereby lowering or raising the temperature of the batteries 51 in the battery module 5, thereby adjusting the operating temperature of each battery module 5 and achieving a dynamic balance of the temperature in the cabinet 2.

[0023] Please refer to FIG. 1, FIG. 2 and FIG. 3 together. FIG. 3 is a system schematic diagram of the central control module of the battery temperature control system shown in FIG. 1. The air conditioner 3, the central control module 4 and the multiple battery modules 5 of the battery temperature control system 1 are all installed in a cabinet 2. As shown in FIG. 2, the cabinet 2 is a large cabinet structure, and in this embodiment, the multiple battery modules 5A, 5B, 5C, 5D... are installed in two rows, and the number is 18, but the arrangement manner and number are not limited thereto, and can be arbitrarily changed according to the actual implementation situation. In this embodiment, the air conditioner 3 is installed in front of the cabinet 2, that is, hung on the cabinet door of the cabinet 2, but since the cabinet door of the cabinet 2 is not shown in this figure, the air conditioner 3 is omitted. In other embodiments, the air conditioner 3 may be installed in the rear of the interior of the cabinet 2 or outside the cabinet 2, and the installation position and number are not limited thereto. Since it is mainly used as a cold or hot air supply source for the battery temperature control system 1, any temperature control device capable of providing cold or hot air is within the scope of protection of the present invention and is not limited to the above embodiment. In addition, the air conditioner 3 may be a commonly available air conditioner or heater, but is not limited thereto, and all of its components (e.g., controller, temperature sensor, connector, etc.) are omitted. In this embodiment, as shown in FIG. 1, the air conditioner 3 includes both a cooling module 31 and a heating module 32, and therefore can provide cold or hot air by a cold source or a heat source according to a temperature control command sent by the central control module 4.

[0024] As shown in FIG. 2, the central control module 4 is installed on the battery module 5A by stacking, but the installation position is not limited thereto. Also, as shown in FIG. 3, the central control module 4 includes components such as a main control panel 40, a core processor 41, a memory unit 42, and a connection module 43, and the core processor 41, the memory unit 42, and the connection module 43 are electrically connected to each other and installed on the main control panel 40. The memory unit 42 is used to store information of a reference temperature, and the connection module 43 includes a plurality of connectors (not shown) correspondingly connected to the air conditioner 3 and the plurality of battery modules 5. In some embodiments, the central control module 4 further includes at least one temperature sensor (not shown) for detecting an ambient temperature in the cabinet 2 and transmitting information of the ambient temperature to the core processor 41. In other embodiments, the ambient temperature in the cabinet 2 can also be calculated and evaluated by a plurality of operating temperatures provided by the plurality of battery modules 5, but is not limited thereto.

[0025] In this embodiment, the core processor 41 is used to receive information, compare and calculate to make a judgment, and generate a corresponding command. In other words, after the core processor 41 receives the information of the ambient temperature, it makes a relevant judgment and sends a corresponding temperature control command to the air conditioner 3 via the connection module 43, and the air conditioner 3 operates a corresponding operation mode, for example, a cooling mode or a heating mode, to provide cold air or hot air to adjust the temperature, and further achieve a dynamic balance of the temperature in the cabinet 2. In this embodiment, the temperature control command includes a first temperature control command and a second temperature control command, and when it is determined that the ambient temperature is in a high temperature state, the core processor 41 of the central control module 4 sends a first temperature control command to the air conditioner 3 to operate the cooling module 31 of the air conditioner 3 to provide cold air, so that the multiple battery modules 5 in the cabinet 2 can draw in the cold air to lower the temperature. Conversely, when it is determined that the ambient temperature is in a low temperature state, the core processor 41 of the central control module 4 transmits the second temperature control command to the air conditioner 3 to operate the heating module 32 of the air conditioner 3 to provide hot air, so that the battery modules 5 in the cabinet 2 can draw in hot air and increase their temperature. In addition, the core processor 41 transmits a corresponding fan operation command to each battery module 5 via the connection module 43 according to the state of the operation mode of the air conditioner 3 and whether the deviation value exceeds a predetermined value, so that the fan unit 53 operates an operation mode and lowers or raises the temperature of the batteries 51 so as to adjust the operation temperature of each battery module 5, respectively. In this embodiment, the fan operation command includes a high speed operation command, a medium speed operation command, and a low speed operation command, and the fan unit 53 of the battery module 5 operates a high speed / medium speed / low speed operation mode according to the high speed / medium speed / low speed operation command.

[0026] 4, 5, 6A and 6B, FIG. 4 is a system schematic diagram of the battery module of the battery temperature control system shown in FIG. 1. FIG. 5 is a schematic structural diagram of the battery module of the battery temperature control system shown in FIG. 1 from a certain viewpoint. FIG. 6A is a schematic front view showing the structure of the battery module shown in FIG. 5 from another viewpoint. FIG. 6B is a schematic bottom view showing the structure of the battery module shown in FIG. 6A. As shown in FIG. 4, each battery module 5 includes a plurality of batteries 51a, 51b, 51c..., a control unit 52, a fan unit 53, a temperature sensing module 54, and a connection part 56. The plurality of batteries 51a, 51b, 51c... are all electrically connected to the control unit 52, the temperature sensing module 54, and the connection part 56, so that the power generated by the plurality of batteries 51a, 51b, 51c... is transmitted to the outside through the connection part 56. In addition, the fan unit 53, the temperature sensing module 54, and the connection parts 56 are also electrically connected to the control unit 52, and the temperature sensing module 54 transmits the temperature information of the batteries 51a, 51b, 51c... to the control unit 52, and after calculation and judgment, the fan unit 53 can be controlled to operate the corresponding operation mode. As shown in FIG. 5, each battery module 5 is assembled into a housing 50 and accommodated in the cabinet 2. The housing 50 has a rectangular box structure, and can be pulled out in a drawer-like manner and accommodated in the cabinet 2, but is not limited thereto. The housing 50 has four sides, two of which correspond to each other, and a first side 502 and a second side 503 are respectively installed on a first side 500 and a second side 501. The first side 500 and the second side 501 correspond to each other, and when accommodated in the cabinet 2, the first side 500 and the second side 501 are the front side and the rear side, respectively, i.e., the first side 500 installed on the front side corresponds adjacent to the cabinet door of the cabinet 2 in which the air conditioner 3 is installed, i.e., is installed on the front side of the cabinet 2, and the second side 501 corresponds to the rear side of the cabinet 2.5, a first opening 502a is provided on a first side surface 502 installed on the first side 500, and in this embodiment, the first opening 502a is a narrow elongated hole hollowed out through the center of the first side surface 502, through which cool air or hot air for temperature adjustment flows into the battery module 5. Of course, the shape, installation position and number of the first opening 502a are not limited to this, and can be arbitrarily changed according to the actual implementation situation.

[0027] As shown in FIG. 6A and FIG. 6B, the second side 501 facing the first side 500 also has a second side surface 503. A plurality of second openings 503a (as shown in FIG. 6B) and third openings 503b are also provided on the second side surface 503. In this embodiment, the second openings 503a are provided below the extension portion 504 of the second side surface 503, and their positions are shown by the structural schematic diagram of the bottom view of FIG. 6B. In this embodiment, the number of second openings 503a for the hot air inside the battery module 5 to flow out is two. The third openings 503b are fence-type opening structures that laterally penetrate the second side surface 503, and their installation positions correspond to the internal fan units 53, and are used to exhaust the hot air of forced convection by the fan units 53 to the outside of the battery module 5. Of course, the form, installation positions, and number of the second openings 503a and the third openings 503b are not limited to the examples of this embodiment, and can be arbitrarily changed according to the actual implementation situation.

[0028] Please refer to FIG. 7. FIG. 7 is a schematic diagram showing the internal structure of the battery module shown in FIG. 6A. As shown in the figure, a plurality of batteries 51a, 51b, 51c... are installed inside the battery module 5, and the plurality of batteries 51a, 51b, 51c... are installed in two rows, that is, in this embodiment, the battery module 5 includes two rows of batteries 51, and the number of batteries 51 in each row is 11, so that the battery module 5 of this embodiment includes a total of 22 batteries 51, but the number of batteries 51 can be arbitrarily changed according to the actual implementation situation. A fan unit 53 is provided on the second side 501 of the battery module 5, and in this embodiment, the fan unit 53 includes two fans 53a, 53b, and the fans 53a and 53b are installed symmetrically on both sides, and the positions of the fans 53a and 53b correspond to the two rows of batteries 51 and are respectively used to dissipate heat from the batteries 51 in the rows, but the number and positions of the fans 53a and 53b of the fan unit 53 are not limited thereto. As shown in the figure, the control unit 52 of the battery module 5 is installed on a circuit board 55, and the circuit board 55 is installed correspondingly between the fans 53a, 53b, but is not limited thereto. In some embodiments, the temperature sensing module 54 includes a plurality of temperature sensors (not shown), which are installed inside the housing 50 respectively and correspondingly installed to the plurality of batteries 51a, 51b, 51c..., measure and monitor the temperature of each battery 51a, 51b, 51c... of the battery module 5, and transmit the temperatures of the plurality of batteries 51a, 51b, 51c... to the control unit 52 on the circuit board 55 to calculate the operating temperature of the battery module 5. In this embodiment, the operating temperature is the average temperature of the plurality of batteries 51a, 51b, 51c... in the battery module 5, i.e., a first average temperature.Also, in this embodiment, the connection parts 56 may include, but are not limited to, connectors for transmitting signals or electrical connectors for transmitting power, etc., and are used to transmit information of the monitored operating temperature of the battery module 5 to the central control module 4, or to transmit power provided by the multiple batteries 51 of the battery module 5.

[0029] Please refer to FIG. 1, FIG. 3 and FIG. 4 together. As described above, the temperature sensing module 54 of each battery module 5 continuously monitors the temperature of each battery 51 through its multiple temperature sensors, and transmits these temperature monitoring data to the control unit 52 of the battery module 5 to obtain information on the operating temperature of the battery module 5 (i.e., the first average temperature). Then, the operating temperature information is transmitted to the central control module 4 through the connection part 56, and compared with a reference temperature to obtain a deviation value between the operating temperature of each battery module 5 and the reference temperature. In this embodiment, the reference temperature is the second average temperature of the multiple battery modules 5A, 5B, 5C, 5D..., that is, after transmitting the operating temperatures (first average temperatures) of each battery module 5A, 5B, 5C, 5D... monitored by the temperature sensing module 54 to the central control module 4, the core processor 41 calculates the current average temperature of the multiple battery modules 5A, 5B, 5C, 5D..., that is, the second average temperature, which is the reference temperature for temperature adjustment.

[0030] In this embodiment, the thermal management of the battery modules 5A, 5B, 5C, 5D... is dynamic thermal management, and the battery modules 5A, 5B, 5C, 5D... are thermally managed respectively according to the current working mode (cooling mode or heating mode) of the air conditioner 3 and whether the deviation value exceeds a predetermined value. For example, when the air conditioner 3 is in the cooling mode, i.e., providing cold air, and the deviation value of the battery module 5A is positive and higher than a predetermined value, the core processor 41 of the central control module 4 sends a high-speed operation command to the battery module 5A. In this embodiment, the allowable predetermined value of the deviation value is 5°C, but is not limited thereto. In other words, when the working temperature of the battery module 5A is 5°C higher than the reference temperature, the control unit 52 of the battery module 5A operates the fan unit 53 in the corresponding high-speed operation mode in response to the high-speed operation command, thereby lowering the temperature of the batteries 51 in the battery module 5A, thereby lowering the working temperature of the battery module 5A, and adjusting the deviation value to within the predetermined value.

[0031] 5, 6A, 6B and 7 are also referred to. Continuing from the above, when the fan unit 53 of the battery module 5A executes the high-speed operation mode, it forcibly dissipates heat from the batteries 51 in the battery module 5A, that is, the heat generated by the batteries 51 is rapidly transferred to the outside from the second openings 503a and the third openings 503b on the second side 503 by the high-speed operation of the fans 53a and 53b. At the same time, the cold air provided by the cold source of the air conditioner 3 is rapidly introduced into the battery module 5A from the first opening 502a on the first side 502, and flows through the batteries 51 in order to dissipate heat and lower the operating temperature of the battery module 5A. In addition, the temperature sensing module 54 continuously monitors the operating temperature of the battery module 5A, and transmits the information of the operating temperature to the central control module 4 via the control unit 52, and performs calculation again. After the temperature adjustment process, when the deviation value between the operating temperature of the battery module 5A and the reference temperature (i.e., the second average temperature) falls within a predetermined value (i.e., 5°C), the central control module 4 sends a medium-speed operation command to the battery module 5A. After receiving the medium-speed operation command, the control unit 52 of the battery module 5A sends it to the fan unit 53, and the fan unit 53 operates the corresponding medium-speed operation mode. Then, the fans 53a and 53b reduce their rotation speed to a medium speed, and the speed of the cool air transported into the battery module 5A slows down, so that the temperature drop speed of the battery module 5A slows down and the operating temperature is maintained.

[0032] Conversely, when the air conditioner 3 is still in the cooling mode and the deviation value of the battery module 5A is negative and higher than the predetermined value (5°C), that is, when the deviation value between the operating temperature of the battery module 5A and the reference temperature (i.e., the second average temperature) drops to or above the predetermined value (i.e., 5°C), that is, when the operating temperature of the battery module 5A is lower than the reference temperature (the second average temperature) by 5°C or more, the central control module 4 sends a low-speed operation command to the battery module 5A, the control unit 52 further sends a low-speed operation command to the fan unit 53, the fan unit 53 activates the low-speed operation mode and operates the fans 53a, 53b at low speed, so that a small amount of cool air enters the battery module 5A, thereby reducing the cooling capacity.

[0033] In another embodiment, when the air conditioner 3 is in heating mode, i.e., providing hot air, and the deviation value of the battery module 5B is positive and higher than a predetermined value (5°C), the core processor 41 of the central control module 4 sends a low-speed operation command to the battery module 5B. In response to the low-speed operation command, the control unit 52 of the battery module 5B enables the fan unit 53 to operate the corresponding low-speed operation mode, and makes the fans 53a, 53b operate at low speeds, so that a small amount of hot air enters the battery module 5B, thereby reducing the heating capacity. If the deviation value of the battery module 5B is negative and higher than the predetermined value (5°C), that is, if the operating temperature of the battery module 5B is lower than the reference temperature (second average temperature) by 5°C or more, the central control module 4 sends a high-speed operation command to the battery module 5B, the control unit 52 sends a high-speed operation command to the fan unit 53, the fan unit 53 activates the high-speed operation mode and operates the fans 53a, 53b at high speed, so that a large amount of warm air enters the battery module 5B quickly, thereby raising the temperature of the multiple batteries 51 in the battery module 5B, and raising the operating temperature of the battery module 5B, and adjusting the deviation value to within the predetermined value.

[0034] As described above, when the air conditioner 3 is in the heating mode, but the deviation value between the operating temperature of the battery module 5B and the reference temperature (i.e., the second average temperature) is lower than a predetermined value (i.e., 5°C), that is, when the operating temperature of the battery module 5B is within the allowable range of the second average temperature, the central control module 4 sends a medium-speed operation command to the battery module 5B, and the fan unit 53 of the battery module 5B operates in the corresponding medium-speed operation mode, and the speed of the hot air transported into the battery module 5B slows down, thereby slowing down the heating rate of the battery module 5B and maintaining its operating temperature.

[0035] Thus, in this embodiment, the multiple battery modules 5A, 5B, 5C, 5D... are dynamic thermal management, and the temperature of the battery modules 5A, 5B, etc., whose operating temperatures vary (i.e., the deviation value is greater than a predetermined value) is controlled as needed through the central control module 4. The fan units 53 of these battery modules 5A, 5B are adjusted to different wind speeds according to fan operation commands, and in conjunction with the operating modes provided by the air conditioner 3, the operating temperatures of the battery modules 5A, 5B are lowered or raised to return to the average value, so as to maintain the temperature consistency of the multiple battery modules 5A, 5B, 5C, 5D.... At the same time, the temperature uniformity of the multiple batteries 51 in each battery module 5 is also improved, which can effectively extend the service life of these batteries 51 and prevent the loss of total electrical capacity.

[0036] As described above, the present invention provides a battery temperature control system in which the central control module transmits a temperature control command to the air conditioner based on the ambient temperature to operate the cool or warm air, compares and calculates the information of the operating temperatures transmitted from the battery modules in the cabinet, transmits a fan operation command to each battery module, and the fan unit of each battery module operates the operation mode accordingly, lowers or raises the temperature of the batteries in the battery module, and adjusts the operating temperature of each battery module as needed to achieve dynamic temperature balance. Therefore, the cooling or heating efficiency of each battery module in the cabinet can be effectively improved, and the temperature consistency of the batteries can be improved, thereby extending the life of the battery, preventing the loss of the total electric capacity, and improving the reliability of the product. Various modifications of the present invention can be made by those skilled in the art, but without departing from the scope defined by the claims. [Explanation of symbols]

[0037] 1: Battery temperature control system 2: Cabinet 3:Air conditioner 31: Cooling module 32: Heating module 4: Central control module 40: Main control panel 41: Core processor 42: Memory unit 43: Connection module 5, 5A, 5B, 5C, 5D: Battery module 50: Cabinet 500: 1st side 501:Second side 502: 1st side 502a: 1st opening 503:Second side 503a: 2nd opening 503b: Third opening 504: Stretching section 51, 51a, 51b, 51c: Battery 52: Control unit 53: Fan unit 54: Temperature sensing module 55: Circuit board 56: Connection parts

Claims

1. A battery temperature control system including a cabinet, an air conditioner, a central control module, and a plurality of battery modules, The air conditioner is installed in the cabinet and provides cold or hot air; the central control module is installed within the cabinet and is electrically connected to the air conditioner; the plurality of battery modules are electrically connected to the central control module, each of the battery modules includes a plurality of batteries, a control unit, a fan unit, and a temperature sensing module, the plurality of batteries, the fan unit, and the temperature sensing module are all electrically connected to the control unit, each of the battery modules is assembled into a housing and accommodated in the cabinet, the housing has two corresponding first and second sides, a first opening is provided on the first side, and a second opening and a third opening are provided on the second side, the temperature sensing module detects and monitors the operating temperature of the corresponding battery module, and transmits information of the detected operating temperature to the central control module; the central control module transmits a temperature control command to the air conditioner based on an ambient temperature to operate the cool air or the hot air, calculates a deviation value between the detected operating temperature transmitted from the plurality of battery modules and a reference temperature, generates a fan operation command according to an operating mode of the air conditioner and whether the deviation value exceeds a predetermined value, and transmits the fan operation command to each of the battery modules; The fan unit of each of the battery modules operates in a corresponding operation mode according to the fan operation command, thereby lowering or raising the temperature of the plurality of batteries so as to adjust the operating temperature of each of the battery modules, respectively; The fan operation command includes a high speed operation command, a medium speed operation command, and a low speed operation command, the operation modes of the fan unit include a high speed operation mode, a medium speed operation mode, and a low speed operation mode; When the control unit of the battery module receives any one of the high-speed operation command, the medium-speed operation command, or the low-speed operation command, the fan unit operates the high-speed operation mode, the medium-speed operation mode, or the low-speed operation mode in response to the command, so that cool air or hot air for temperature control flows into each of the battery modules from the first opening, lowers or raises the temperature of the plurality of batteries, and then flows out vertically from the second opening and horizontally from the third opening, thereby adjusting the operating temperature of each of the battery modules and achieving dynamic temperature balance.

2. The battery temperature control system according to claim 1 , wherein the air conditioner includes a cooling module and a heating module for providing the cold air or the hot air.

3. The temperature control command includes a first temperature control command and a second temperature control command, and when it is determined that the ambient temperature is in a high temperature state, the central control module transmits the first temperature control command to the air conditioner, and when it is determined that the ambient temperature is in a low temperature state, the central control module transmits the second temperature control command to the air conditioner; 3. The battery temperature control system of claim 2, wherein the air conditioner operates the cooling module to provide the cool air when the first temperature control command is received, and operates the heating module to provide the hot air when the second temperature control command is received.

4. 2. The battery temperature control system of claim 1, wherein the detected operating temperature of each battery module is a first average temperature of the plurality of batteries within the battery module.

5. The battery temperature control system according to claim 1 , wherein the reference temperature is a second average temperature of the plurality of battery modules.

6. 2. The battery temperature control system according to claim 1, wherein, when the operating mode of the air conditioner is a cooling mode, and the deviation value is positive and higher than the predetermined value, the central control module sends the high-speed operation command to the battery module, and the fan unit accordingly operates the high-speed operation mode to reduce the temperature of the plurality of batteries in the battery module, and reduce the operating temperature of the battery module.

7. 2. The battery temperature control system as claimed in claim 1, characterized in that, when the operating mode of the air conditioner is a cooling mode, and the deviation value is negative and higher than a predetermined value, the central control module sends the low speed operation command to the battery module, and the fan unit accordingly operates the low speed operation mode to reduce cooling capacity.

8. 2. The battery temperature control system of claim 1, wherein when the deviation value is lower than the predetermined value, the central control module sends the medium-speed operation command to the battery module, and the fan unit operates in the medium-speed operation mode accordingly to maintain an operating temperature of the battery module.

9. 2. The battery temperature control system as claimed in claim 1, characterized in that, when the operating mode of the air conditioner is a heating mode, and the deviation value is a positive number and higher than the predetermined value, the central control module sends the low speed operation command to the battery module, and the fan unit accordingly operates the low speed operation mode to reduce the heating capacity.

10. 2. The battery temperature control system as claimed in claim 1, characterized in that, when the operating mode of the air conditioner is a heating mode, and the deviation value is negative and higher than the predetermined value, the central control module sends the high-speed operation command to the battery module, and the fan unit accordingly operates the high-speed operation mode to increase the temperature of the plurality of batteries in the battery module, and increase the operating temperature of the battery module.

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