Battery pack fan fault detection circuit, device and battery energy storage system

Abstract

The application relates to a battery pack fan fault detection circuit, a device and a battery energy storage system, wherein each collection component is one-to-one correspondingly arranged with each heat dissipation fan, and the collection component is used for collecting the signal of the corresponding heat dissipation fan; a first processing module is connected with each collection component; the first processing module is used for acquiring the signal transmitted by each collection component, and triggering a fault reminder for the corresponding heat dissipation fan according to the signal, so that the fault condition of the heat dissipation fan can be automatically detected by setting the corresponding fault detection circuit of the heat dissipation fan without changing the original heat dissipation fan, the fault condition of the heat dissipation fan can be fed back in time, an operator does not need to go to the scene to check the fan anomaly, and the efficiency of the fan fault detection is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack fan fault detection circuit, device, and battery energy storage system. Background Technology

[0002] Air-cooled energy storage systems primarily rely on airflow for heat dissipation. An air-cooled energy storage system consists of multiple battery packs, each equipped with a cooling fan. The cooling fan uses airflow to remove the heat generated by the battery pack, thereby reducing the surface temperature of the battery pack.

[0003] In the current battery pack fan fault detection, manual troubleshooting is usually used (such as listening to the fan sound on site). When the battery temperature difference is abnormal, the operator goes to the site to check the fan abnormality in order to identify the faulty fan. However, manual troubleshooting is cumbersome and has a lag, which makes it impossible to detect the faulty fan in time. Utility Model Content

[0004] Based on this, a battery pack fan fault detection circuit, device, and battery energy storage system are provided.

[0005] In a first aspect, this application provides a battery pack fan fault detection circuit, applied to a battery pack, the battery pack being provided with battery groups and at least one cooling fan, each cooling fan being used to dissipate heat from the battery groups of the corresponding battery pack; the battery pack fan fault detection circuit includes: The acquisition module includes at least one acquisition component, and each acquisition component is configured to correspond one-to-one with each cooling fan. The acquisition component is used to acquire the signal of the corresponding cooling fan. The first processing module is connected to each acquisition component. The first processing module is used to acquire the signals transmitted by each acquisition component and, based on the signals, trigger a fault alert for the corresponding cooling fan.

[0006] In one embodiment, the battery pack fan fault detection circuit further includes a power conversion module for connecting to a power supply, and a first processing module connected to the power conversion module; the acquisition components include a current acquisition module and a first voltage acquisition module. The current acquisition module is connected between the power supply and the power supply terminal of the corresponding cooling fan. The first voltage acquisition module is connected to the power conversion module and the power supply terminal of the corresponding cooling fan. The current acquisition module and the first voltage acquisition module are connected to the first processing module.

[0007] In one embodiment, the acquisition component further includes an acceleration sensing module; the acceleration sensing module is disposed on one side of the corresponding cooling fan; The acceleration sensing module is connected to the power supply and the first processing module respectively.

[0008] In one embodiment, the first processing module includes a first processing chip and at least one second processing chip; the acquisition component further includes a second voltage acquisition module and a temperature acquisition module; Each second processing chip is connected to the first processing chip, and the second processing chip is respectively connected to the second voltage acquisition module and temperature acquisition module of the corresponding acquisition component.

[0009] In one embodiment, the first processing module further includes a third processing chip; The third processing chip is connected to the first processing chip, and the third processing chip is also used to connect to the third processing chip of another corresponding battery pack.

[0010] In one embodiment, the current acquisition module includes a first shunt and a second shunt, the power supply terminal of the cooling fan includes a positive power supply pin and a negative power supply pin, and the power supply includes a positive terminal and a negative terminal. The first shunt is connected between the positive terminal of the power supply and the positive power supply pin of the corresponding cooling fan, and the second shunt is connected between the negative terminal of the power supply and the negative power supply pin of the corresponding cooling fan.

[0011] In one embodiment, the battery pack fan fault detection circuit also includes a communication module; The first processing module is connected to the acquisition module via the communication module.

[0012] Secondly, this application also provides a battery pack fan fault detection device, including a second processing module and a plurality of battery pack fan fault detection circuits as described above. Each battery pack fan fault detection circuit is set up to correspond one-to-one with each battery pack; the second processing module is connected to each battery pack fan fault detection circuit.

[0013] In one embodiment, the second processing module includes a display, a main processing unit, and multiple cluster processing units; The cluster processing unit is connected to the fan fault detection circuit of each battery pack in the corresponding battery cluster, and the main processing unit is connected to each cluster processing unit respectively; the main processing unit is used to connect to the display and the remote terminal.

[0014] Thirdly, this application also provides a battery energy storage system, including multiple battery clusters and a battery pack fan fault detection device as described above; the battery clusters include multiple battery packs; The battery pack fan fault detection device is connected to each battery pack.

[0015] One of the above technical solutions has the following advantages and beneficial effects: The aforementioned battery pack fan fault detection circuit is applied to a battery pack, which includes battery packs and at least one cooling fan. Each cooling fan is used to dissipate heat from the battery packs. The battery pack fan fault detection circuit includes a data acquisition module and a first processing module. The data acquisition module includes at least one data acquisition component, each corresponding to a cooling fan. The data acquisition component is used to acquire signals from the corresponding cooling fan. The first processing module is connected to each data acquisition component. The first processing module acquires the signals transmitted by each data acquisition component and, based on the signals, triggers a fault alert for the corresponding cooling fan, thus achieving automatic fault detection of the cooling fan. This application, by setting corresponding data acquisition components on the cooling fans, allows the first processing module to trigger fault alerts based on the signals acquired by the data acquisition components. Without changing the original cooling fans, by setting corresponding fault detection circuits on the cooling fans, it achieves automatic detection of cooling fan faults and timely feedback of cooling fan fault conditions, eliminating the need for operators to go to the site to troubleshoot fan abnormalities, thereby improving the efficiency of fan fault detection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first circuit connection of the battery pack fan fault detection circuit in an embodiment of this application; Figure 2 This is a schematic diagram of the second circuit connection of the battery pack fan fault detection circuit in an embodiment of this application; Figure 3 This is a schematic diagram of the third circuit connection of the battery pack fan fault detection circuit in an embodiment of this application; Figure 4 This is a schematic diagram of the fourth circuit connection of the battery pack fan fault detection circuit in an embodiment of this application; Figure 5 This is a schematic diagram of the first structure of the battery pack in an embodiment of this application; Figure 6 This is a schematic diagram of the second structure of the battery pack in an embodiment of this application; Figure 7 This is a schematic diagram of the first circuit connection of the battery pack fan fault detection device in an embodiment of this application; Figure 8 This is a schematic diagram of the second circuit connection of the battery pack fan fault detection device in an embodiment of this application.

[0017] Figure label: 10. Battery pack; 102. Battery group; 104. Cooling fan; 20. Battery pack fan fault detection circuit; 200. Acquisition module; 210. Acquisition component; 212. Current acquisition module; 2122. First shunt; 2124. Second shunt; 214. First voltage acquisition module; 216. Acceleration sensor module; 218. Second voltage acquisition module; 222. Temperature acquisition module; 230. First processing module; 232. First processing chip; 234. Second processing chip; 236. Third processing chip; 240. Power conversion module; 250. Communication module; 30. Second processing module; 302. Display; 304. Main processing unit; 306. Cluster processing unit; 308. Remote terminal. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In addition, the term "multiple" should mean two or more.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, such as Figure 1 , Figure 5 and Figure 6As shown, a battery pack fan fault detection circuit is also provided, applied to a battery pack 10. The battery pack 10 is provided with a battery group 102 and at least one cooling fan 104. Each cooling fan 104 is used to dissipate heat from the battery group 102 of the corresponding battery pack 10. The battery pack fan fault detection circuit 20 includes a data acquisition module 200 and a first processing module 230. The data acquisition module 200 includes at least one data acquisition component 210. Each data acquisition component 210 is configured to correspond one-to-one with each cooling fan 104. The data acquisition component 210 is used to acquire the signal of the corresponding cooling fan 104. The first processing module 230 is connected to each data acquisition component 210. The first processing module 230 is used to acquire the signal transmitted by each data acquisition component 210 and, based on the signal, trigger a fault reminder for the corresponding cooling fan 104.

[0023] The battery pack 10 can be a lithium battery pack 10, which can be square in structure. The number of cooling fans 104 in the battery pack 10 can be determined according to the model and size of the battery pack 102. For example, the battery pack 10 may include two cooling fans 104, which can be located on the same side or opposite sides of the battery pack 102. The battery pack 102 may be composed of several individual cells, which can be lithium-ion batteries. The individual cells can be square in structure and arranged at a preset interval. There is a gap between two adjacent individual cells. For example, a cooling conductor can be provided between two adjacent individual cells to form a cooling channel. The air inlet or outlet of the cooling fan 104 is connected to the cooling channel of the corresponding battery pack 102. For example, the air inlet of the cooling fan 104 is located near the first end of the cooling channel of the corresponding battery pack 102, so that the cooling fan 104 draws air to the corresponding battery pack 102 for heat dissipation; or the air outlet of the cooling fan 104 is located near the first end of the cooling channel of the corresponding battery pack 102, so that the cooling fan 104 blows air to the corresponding battery pack 102 for heat dissipation.

[0024] The battery pack 10 may include a battery housing with a receiving cavity for accommodating the battery pack 102 and at least one cooling fan 104. At least one heat dissipation vent is provided on one side of the battery housing, and the air inlet or outlet of the cooling fan 104 is connected to the corresponding heat dissipation vent. The battery housing is provided with a cover plate, and the first processing module 230 is disposed between the cover plate and the top of the battery pack 102. For example, the battery housing is provided with an insulating layer, which is disposed between the first processing module 230 and the battery pack 102, serving as insulation between the first processing module 230 and the battery pack 102.

[0025] For example, the acquisition component 210 may include an electrical parameter acquisition component 210 and a vibration parameter acquisition component 210. The electrical parameter acquisition component 210 is connected to the corresponding cooling fan 104 and is used to acquire the electrical parameter signals of the corresponding cooling fan 104; the vibration parameter acquisition component 210 is disposed on one side of the corresponding cooling fan 104 and is used to acquire the vibration parameter signals of the corresponding cooling fan 104. The first processing module 230 may be a BMU (Battery Management Unit) control board. Based on the first processing module 230 connecting to each acquisition component 210 of the corresponding battery pack 10, the first processing module 230 may pre-load an existing application, thereby acquiring the signals transmitted by each acquisition component 210 and triggering a fault alert for the corresponding cooling fan 104 based on the signals. The communication lines of each acquisition component 210 may be connected to the first processing module 230 by means of plugging or soldering. In another example, the first processing module 230 is equipped with an analog comparator and an analog trigger. The analog trigger is connected to the analog comparator. The analog comparator is used to compare the corresponding signal with a preset signal. The analog trigger, based on the output signal of the analog comparator, triggers the corresponding cooling fan 104 to output a fault alert.

[0026] For example, the first processing module 230 can be connected to a display 302 or a remote terminal 308 (such as an EMS (Energy Management System)). The first processing module 230 can then trigger the display 302 to show fault reminder information. The first processing module 230 can also be connected to a remote terminal 308 (such as an EMS (Energy Management System)). The first processing module 230 can then transmit the fault reminder information to the remote terminal 308, which will then display the fault reminder information. This allows operators to remotely check the fan malfunction status of the battery pack 10, accurately identify the faulty fan, and prepare replacement parts in a timely manner. This prevents on-site fan damage from affecting system operation and improves user experience.

[0027] In another example, the first processing module 230 is also used to connect to an alarm. The first processing module 230 can trigger the alarm to issue a fault reminder, thereby promptly reminding the operator to check the fan failure status of the battery pack 10.

[0028] In the above embodiments, each acquisition component 210 is configured in a one-to-one correspondence with each cooling fan 104. The acquisition component 210 is used to acquire signals from the corresponding cooling fan 104. The first processing module 230 is connected to each acquisition component 210. The first processing module 230 is used to acquire the signals transmitted by each acquisition component 210 and, based on the signals, trigger a fault alert for the corresponding cooling fan 104, thereby enabling automatic fault detection of the cooling fan 104. This application, by setting corresponding acquisition components 210 on the cooling fan 104, allows the first processing module 230 to trigger a fault alert for the corresponding cooling fan 104 based on the signals acquired by the acquisition components. Without changing the original cooling fan 104, by setting corresponding fault detection circuits on the cooling fan 104, the fault status of the cooling fan 104 can be automatically detected and promptly reported, eliminating the need for operators to go to the site to troubleshoot fan abnormalities, thus improving the efficiency of fan fault detection.

[0029] In one embodiment, such as Figure 2 and Figure 3 As shown, the battery pack fan fault detection circuit 20 also includes a power conversion module 240, which is used to connect to the power supply. The first processing module 230 is connected to the power conversion module 240. The acquisition component 210 includes a current acquisition module 212 and a first voltage acquisition module 214. The current acquisition module 212 is connected between the power supply and the power supply terminal of the corresponding cooling fan 104. The first voltage acquisition module 214 is connected to the power conversion module 240 and the power supply terminal of the corresponding cooling fan 104, respectively. The current acquisition module 212 and the first voltage acquisition module 214 are connected to the first processing module 230.

[0030] The power supply can be a 24V DC power supply. The power conversion module 240 can convert the 24V electrical signal into a 5V electrical signal and supply the converted electrical signal to the first processing module 230. For example, the current acquisition module 212 can be connected in series between the power supply and the power supply terminal of the corresponding cooling fan 104. The current acquisition module 212 is used to acquire the supply current of the corresponding cooling fan 104. For example, the first voltage acquisition module 214 includes a first voltage acquisition chip, which is connected to the power supply terminal of the corresponding cooling fan 104. The first voltage acquisition module 214 is used to acquire the supply voltage of the corresponding cooling fan 104. Based on the connection of the first voltage acquisition module 214 to the power conversion module 240, the power conversion module 240 provides the converted electrical signal to the first voltage acquisition module 214.

[0031] Based on the connection of the first processing module 230 to the current acquisition module 212 and the first voltage acquisition module 214, the current acquisition module 212 acquires the power supply current of the corresponding cooling fan 104 at different acquisition time points and transmits the power supply current at different acquisition time points to the first processing module 230; the first voltage acquisition module 214 acquires the power supply voltage of the corresponding cooling fan 104 at different acquisition time points and transmits the power supply voltage at different acquisition time points to the first processing module 230; the first processor can receive the power supply current and power supply voltage of the corresponding cooling fan 104 at different acquisition time points based on the connected communication line, and trigger the fault reminder of the corresponding faulty fan according to each power supply current and each power supply voltage. For example, the first processing module 230 can set different types of analog comparators to compare the supply voltage with a preset voltage threshold and the supply current with a preset current threshold, and output electrical signals of corresponding levels. Based on the corresponding electrical signals, it can determine the fault type of the cooling fan 104 (such as fan stall fault, fan open circuit fault, etc.) and trigger the corresponding fault type fault reminder through an analog trigger. This achieves low-cost detection of the operating status of the cooling fan 104, can identify the fault condition of the cooling fan 104, and can accurately measure the supply current and supply voltage of the cooling fan 104 to identify different types of faults, thereby improving the accuracy and efficiency of fan fault detection.

[0032] In one embodiment, such as Figure 2 As shown, the acquisition component 210 also includes an acceleration sensing module 216; the acceleration sensing module 216 is disposed on one side of the corresponding cooling fan 104; the acceleration sensing module 216 is connected to the power supply and the first processing module 230 respectively.

[0033] The acceleration sensing module 216 can be a triaxial acceleration sensing module 216. The acceleration sensing module 216 can be disposed on the top surface of the corresponding cooling fan 104, for example, in the middle position of the top surface, to collect data on the vibration of the corresponding cooling fan 104. The acceleration sensing module 216 can be disposed on the top surface of the corresponding cooling fan 104 by means of bonding, screwing, or pressing.

[0034] The acceleration sensing module 216 is connected to a power supply, which in turn supplies power to the acceleration sensing module 216. The acceleration sensing module 216 is connected to a first processing module 230. The acceleration sensing module 216 collects the motion acceleration of the corresponding cooling fan 104 at different acquisition time points and transmits the motion acceleration at different acquisition time points to the first processing module 230. The first processing module 230 can obtain the vibration status of the corresponding cooling fan 104 based on each motion acceleration, thereby triggering a fault alert for the corresponding fault type. For example, the first processing module 230 can set different types of analog comparators to compare the motion acceleration with a preset acceleration threshold and output an electrical signal of the corresponding level. Then, based on the corresponding level of the electrical signal, it can determine the fault type of the cooling fan 104 (such as a fan blade chipping or damage). It can also trigger a fault alert of the corresponding fault type through an analog trigger, thereby realizing multiple fault detection of the fan. Without changing the original cooling fan 104, by setting up a fault detection circuit, it can automatically detect the fault status of the cooling fan 104 and promptly report the fault status of the cooling fan 104. This eliminates the need for operators to go to the site to troubleshoot fan abnormalities, improving the accuracy and efficiency of fan fault detection.

[0035] In one embodiment, such as Figure 3 As shown, the first processing module 230 includes a first processing chip 232 and at least one second processing chip 234; the acquisition component 210 also includes a second voltage acquisition module 218 and a temperature acquisition module 222; each second processing chip 234 is connected to the first processing chip 232, and the second processing chip 232 is respectively connected to the second voltage acquisition module 218 and the temperature acquisition module 222 of the corresponding acquisition component 210.

[0036] The first processing chip 232 and the second processing chip 234 can be MCUs (Microcontroller Units). The second voltage acquisition module 218 may include a second voltage acquisition chip, which can be used to acquire the cell voltage signal of the battery pack 10 and transmit the acquired cell voltage signal to the first processing chip 232. The temperature acquisition module 222 may include a temperature acquisition chip, which can be used to acquire the cell temperature signal of the corresponding battery pack 102 and transmit the acquired cell temperature signal to the first processing chip 232.

[0037] Based on the second processing chip 234 connected to the second voltage acquisition module 218 and temperature acquisition module 222 of the corresponding acquisition component 210, the second processing chip 234 can acquire the cell voltage signal and cell temperature signal of the corresponding cooling fan 104. Based on the first processing chip 232 connected to each of the second processing chips 234, the second processing chip 234 transmits the corresponding cell voltage signal and cell temperature signal to the first processing chip 232. Then, the first processing chip 232 can automatically determine the working status of the cooling fan 104 according to the cell voltage signal and cell temperature signal, realize automatic and timely fault detection of the cooling fan 104, and eliminate the need for operators to go to the site to troubleshoot fan abnormalities, thus improving the efficiency of fan fault detection.

[0038] In one embodiment, such as Figure 3 As shown, the first processing module 230 also includes a third processing chip 236; the third processing chip 236 is connected to the first processing chip 232, and the third processing chip 236 is also used to connect to the third processing chip 236 of another battery pack 10.

[0039] The third processing chip 236 can be an MCU (Microcontroller Unit). The third processing chip 236 can be connected to the third processing chip 236 of another battery pack 10 via a CAN communication line to establish a CAN communication connection between the battery packs 10. The third processing chip 236 is responsible for the connection between the signals inside the battery pack 10 and the signals outside the battery pack 10.

[0040] The third processing chip 236 is connected to the first processing chip 232, so that the third processing chip 236 can automatically determine the operating status of the cooling fan 104 based on the corresponding signals, cell voltage signals, and cell temperature signals transmitted by the first processing chip 232, thereby achieving automatic and timely fault detection of the cooling fan 104. For example, the third processing chip 236 is also used to connect to the high-voltage box of the battery pack. For instance, the third processing chip 236 is connected to the high-voltage box of the corresponding battery pack via a CAN communication line. The third processing chip 236 of each corresponding battery pack 10 can transmit corresponding signals to the high-voltage box, so that the high-voltage box can perform fault detection of the cooling fan 104 through each battery pack 10 within the corresponding battery pack.

[0041] In one embodiment, such as Figure 3 As shown, the current acquisition module 212 includes a first shunt 2122 and a second shunt 2124. The power supply terminal of the cooling fan 104 includes a positive power supply pin and a negative power supply pin. The power supply includes a positive terminal and a negative terminal. The first shunt 2122 is connected between the positive terminal of the power supply and the corresponding positive power supply pin of the cooling fan 104, and the second shunt 2124 is connected between the negative terminal of the power supply and the corresponding negative power supply pin of the cooling fan 104.

[0042] The first shunt 2122 is connected in series between the positive terminal of the power supply and the positive power supply pin of the corresponding cooling fan 104, and the second shunt 2124 is connected in series between the negative terminal of the power supply and the negative power supply pin of the corresponding cooling fan 104. The power supply current of the cooling fan 104 is collected through the first shunt 2122 and the second shunt 2124.

[0043] In the above embodiments, by setting a first shunt 2122, a second shunt 2124, and a first voltage acquisition module 214 at the power supply terminal of the cooling fan 104, the fault status of the cooling fan 104 can be automatically detected and promptly reported without changing the original cooling fan 104. This eliminates the need for operators to go to the site to troubleshoot fan malfunctions, thus improving the efficiency of fan fault detection.

[0044] In one embodiment, such as Figure 4 As shown, the battery pack fan fault detection circuit 20 also includes a communication module 250; the first processing module 230 is connected to the acquisition module 200 through the communication module 250.

[0045] The communication module 250 can be an RS485 communication module 250. For example, the acquisition module 200 integrates an RS485 communication module 250, allowing the acquisition module to transmit the acquired signals to the first processing module 230 via RS485 communication. For example, the first shunt 2122, the second shunt 2124, and the first voltage acquisition module 214 each integrate an RS485 communication module 250, allowing the first shunt 2122, the second shunt 2124, and the first voltage acquisition module 214 to communicate with the first processing module 230 via RS485 communication.

[0046] In one embodiment, such as Figure 7 As shown, a battery pack fan fault detection device is also provided, including a second processing module 30 and a plurality of battery pack fan fault detection circuits 20 as described above; each battery pack fan fault detection circuit 20 is configured in a one-to-one correspondence with each battery pack 10; the second processing module 30 is connected to each battery pack fan fault detection circuit 20 respectively.

[0047] For a detailed description of the battery pack fan fault detection circuit 20, please refer to the description in the above embodiment, which will not be repeated here.

[0048] Based on the one-to-one correspondence between each acquisition component 210 and each cooling fan 104, the acquisition component 210 is used to acquire the corresponding signal of the corresponding cooling fan 104; the first processing module 230 is connected to each cooling fan 104 of the corresponding battery pack 10; the first processing module 230 is connected to each acquisition component 210; the second processing module 30 is connected to each first processing module 230, and the first processing module 230 is used to acquire the corresponding signal transmitted by each acquisition component 210, and trigger a fault reminder for the corresponding cooling fan 104 according to the corresponding signal, so as to realize automatic and timely fault detection of the cooling fan 104. For example, the second processing module 30 is provided with a corresponding CAN communication module 250, and the second processing module 30 can communicate with the fan fault detection circuit 20 of each battery pack through the CAN communication line. The battery pack fan fault detection circuit 20 can transmit fault detection information to the second processing module 30. The second processing module 30 can then display or issue a warning for the fault detection information of the corresponding cooling fan 104 based on the fault detection information transmitted by each battery pack fan fault detection circuit 20, thereby enabling rapid location of the faulty fan and facilitating timely access to fault information by operators.

[0049] In the above embodiments, by setting a corresponding acquisition component 210 on the cooling fan 104, the first processing module 230 can trigger a fault alert for the corresponding cooling fan 104 based on the signal acquisition of the corresponding cooling fan 104 by the acquisition component, and transmit the fault detection information to the second processing module 30. This allows the second processing module 30 to display or warn of the fault detection information of the corresponding cooling fan 104 based on the fault detection information of the first processing module 230. This enables automatic detection of the fault status of the cooling fan 104 without changing the original cooling fan 104, and timely feedback of the fault status of the cooling fan 104. It eliminates the need for operators to go to the site to troubleshoot fan abnormalities, making it convenient for operators to view fan fault information in a timely and convenient manner, thus improving the efficiency and convenience of fan fault detection.

[0050] In one embodiment, such as Figure 8 As shown, the second processing module 30 includes a display 302, a main processing unit 304, and multiple cluster processing units 306; the cluster processing units 306 are connected to the fan fault detection circuits 20 of each battery pack of the corresponding battery cluster, and the main processing unit 304 is connected to each cluster processing unit 306 respectively; the main processing unit 304 is used to connect the display 302 and the remote terminal 308.

[0051] Among them, the main processing unit 304 can be the main controller of BMS (Battery Management System), the cluster processing unit 306 can be the high voltage box of the corresponding battery cluster, the display 302 can be the BMS display 302, and the remote terminal 308 can be the EMS.

[0052] For example, the battery pack fan fault detection circuit 20 of each battery pack 10 in the corresponding battery cluster is connected via CAN communication and is connected in parallel to the cluster processing unit 306 of the corresponding battery cluster. Each cluster processing unit 306 is connected via CNN communication and is connected in parallel to the main processing unit 304. The battery pack fan fault detection circuit 20 uploads the fan fault detection information of the corresponding battery pack 10 to the high-voltage box. The high-voltage box summarizes the fan fault detection information of the single cluster and sends it to the main processing unit 304. The main processing unit 304 processes the signals transmitted from the high-voltage boxes of each cluster and sends them to the display 302 and the remote terminal 308. The operating status signal of the cooling fan 104 can then be obtained through the display 302 and the remote terminal 308, allowing operators to check the fan fault status in a timely manner. This enables remote judgment and identification of the operating status of the fans on site through the display screen and the remote terminal 308, allowing for early detection of fan abnormalities and preventing the charging and discharging of on-site equipment from being affected by fan abnormalities, thus improving the user experience.

[0053] In one embodiment, a battery energy storage system is also provided, including multiple battery clusters and a battery pack fan failure detection device as described above; the battery clusters include multiple battery packs; the battery pack fan failure detection device is connected to each battery pack.

[0054] For a detailed description of the battery pack fan fault detection device, please refer to the description in the above embodiments; it will not be repeated here.

[0055] The battery energy storage system can be an air-cooled lithium battery energy storage system. The battery energy storage system may include an energy storage container, which is equipped with a battery compartment. Each battery cluster is located in the battery compartment. Each battery cluster may include a high-voltage box and several battery packs. Each battery pack is equipped with a corresponding battery pack fan fault detection circuit. The high-voltage box is connected to the fan fault detection circuits of each battery pack in the corresponding battery cluster.

[0056] For example, a battery pack in a battery energy storage system is equipped with two cooling fans. If the system consists of 10 clusters, with each cluster containing 8 battery packs and each pack having 2 cooling fans, then a single battery energy storage system has 160 cooling fans. In traditional battery energy storage systems, troubleshooting typically involves operators going to the site to check for fan malfunctions after a fan failure affects the overall system's normal charging and discharging. Locating and locating faulty fans is difficult, and the troubleshooting process is often delayed, which can easily disrupt the normal operation of the battery energy storage system.

[0057] This application integrates the fan fault detection circuit with the BMU control board (i.e., the first processing module) of the corresponding battery pack in the battery energy storage system. It can automatically detect the fault status of the cooling fan without changing the original cooling fan, and promptly report the fault status of the cooling fan. This eliminates the need for operators to go to the site to troubleshoot fan abnormalities, improves the efficiency of fan fault detection, enhances the reliability of the battery energy storage system, and can adapt to different fans. Replacing the fan does not affect the detection of the fan fault status, thus improving the versatility of fan fault detection.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery pack fan fault detection circuit, characterized in that, The circuit is applied to a battery pack, which includes a battery assembly and at least one cooling fan. Each cooling fan is used to dissipate heat from the battery assembly of the corresponding battery pack. The battery pack fan fault detection circuit includes: A data acquisition module, comprising at least one data acquisition component, wherein each data acquisition component is configured to correspond one-to-one with each cooling fan, and the data acquisition component is used to acquire the signal of the corresponding cooling fan; A first processing module is connected to each of the acquisition components; the first processing module is used to acquire the signals transmitted by each acquisition component, and trigger a fault alert for the corresponding cooling fan based on the signals.

2. The battery pack fan fault detection circuit according to claim 1, characterized in that, The battery pack fan fault detection circuit also includes a power conversion module, which is used to connect to the power supply, and the first processing module is connected to the power conversion module; the acquisition component includes a current acquisition module and a first voltage acquisition module. The current acquisition module is connected between the power supply and the power supply terminal of the corresponding cooling fan. The first voltage acquisition module is connected to the power conversion module and the power supply terminal of the corresponding cooling fan. The current acquisition module and the first voltage acquisition module are connected to the first processing module.

3. The battery pack fan fault detection circuit according to claim 2, characterized in that, The acquisition component also includes an acceleration sensing module; the acceleration sensing module is disposed on one side of the corresponding cooling fan; The acceleration sensing module is connected to the power supply and the first processing module, respectively.

4. The battery pack fan fault detection circuit according to claim 1, characterized in that, The first processing module includes a first processing chip and at least one second processing chip; the acquisition component further includes a second voltage acquisition module and a temperature acquisition module; Each of the second processing chips is connected to the first processing chip, and the second processing chip is respectively connected to the second voltage acquisition module and the temperature acquisition module of the corresponding acquisition component.

5. The battery pack fan fault detection circuit according to claim 4, characterized in that, The first processing module also includes a third processing chip; The third processing chip is connected to the first processing chip, and the third processing chip is also used to connect to a third processing chip corresponding to another battery pack.

6. The battery pack fan fault detection circuit according to claim 2, characterized in that, The current acquisition module includes a first shunt and a second shunt, the power supply terminal of the cooling fan includes a positive power supply pin and a negative power supply pin, and the power supply includes a positive terminal and a negative terminal; The first shunt is connected between the positive terminal of the power supply and the positive power supply pin of the corresponding cooling fan, and the second shunt is connected between the negative terminal of the power supply and the negative power supply pin of the corresponding cooling fan.

7. The battery pack fan fault detection circuit according to any one of claims 1 to 6, characterized in that, The battery pack fan fault detection circuit also includes a communication module. The first processing module is connected to the acquisition module through the communication module.

8. A battery pack fan fault detection device, characterized in that, Includes a second processing module and multiple battery pack fan fault detection circuits as described in any one of claims 1 to 7; Each of the battery pack fan fault detection circuits is configured to correspond one-to-one with each battery pack; the second processing module is connected to each of the battery pack fan fault detection circuits.

9. The battery pack fan fault detection device according to claim 8, characterized in that, The second processing module includes a display, a main processing unit, and multiple cluster processing units; The cluster processing unit is connected to the fan fault detection circuit of each battery pack in the corresponding battery cluster, and the main processing unit is connected to each of the cluster processing units respectively; the main processing unit is used to connect the display and the remote terminal.

10. A battery energy storage system, characterized in that, Includes multiple battery clusters and a battery pack fan failure detection device as described in claim 8 or 9; the battery clusters include multiple battery packs; The battery pack fan fault detection device is connected to each of the battery packs.

Images