Battery monitoring system and battery pack

Abstract

The application discloses a battery monitoring system and a battery pack. A mounting plate is provided with mounting structures on the top surface and the bottom surface to mount a BMS master control board and a slave control board, respectively, without the need for additional multiple independent mounting racks. The mounting plate is combined with two side plates to form an accommodating space, which greatly simplifies the overall structure of the battery and efficiently saves the internal installation space. The side plates are stably connected to the partition plate through the first connecting plates at the bottom end, which not only improves the stability of the overall structure of the mounting rack, but also separates the BMS from the battery cell module to effectively reduce the risk of electric leakage. In addition, the wiring groove of the wiring structure and the accommodation groove of the partition plate are adapted to each other, which not only realizes the regular wiring of multiple NTC thermistors and avoids the disorderly winding of the lines, but also does not need to adjust the overall mechanical structure additionally, and at the same time, the accurate adhesion of the multiple NTC thermistors to the surfaces of different battery cells can realize the direct temperature measurement of multiple battery cells, effectively solving the lag problem of the traditional indirect detection of the temperature in the box.

Description

Technical Field

[0001] This application relates to the field of two-wheeled vehicles, and in particular to a battery monitoring system and battery pack. Background Technology

[0002] Currently, the cell temperature detection of electric two-wheeler batteries typically involves a single temperature sensor installed on the inner wall of the battery box, indirectly inferring the cell temperature by monitoring the ambient temperature inside the box. However, when some cells malfunction, the localized heat is insufficient to quickly raise the overall ambient temperature inside the box, resulting in a lag in the detection signal. This lag can lead to delayed alarms and untimely fire suppression, potentially causing property damage and, in extreme cases, personal injury, posing a significant safety hazard to the use of electric two-wheelers. Utility Model Content

[0003] This application aims to provide a battery monitoring system and battery pack that can directly measure the temperature of multiple battery cells.

[0004] The battery monitoring system provided in the first aspect of this application includes: The mounting plate has mounting structures on its top and bottom surfaces, and the two mounting structures are used to mount the BMS main control board and the BMS slave control board, respectively. Two side plates are respectively connected to opposite sides of the mounting plate, and the two side plates and the bottom surface of the mounting plate enclose a receiving space. A wiring structure is connected to the side of the mounting plate, and the wiring structure is provided with a wiring groove that runs through the top and bottom. A partition is located below the mounting plate. The bottom end of the side plate is bent to form a first connecting plate. The first connecting plate is attached to the top surface of the partition and connected to the partition by fasteners. The partition is provided with a clearance groove that runs vertically through it. The bottom end of the wiring structure passes through the clearance groove. The control unit is located on the BMS main control board or the BMS slave control board; Multiple NTC thermistors are disposed on the surface of different battery cells; all of the multiple NTC thermistors are electrically connected to the control unit through the wiring groove.

[0005] The battery pack provided in the second aspect of this application includes the battery monitoring system described in the first aspect of this application.

[0006] The battery monitoring system and battery pack of this application embodiment use a mounting plate to mount the BMS main control board and slave control board respectively via mounting structures on the top and bottom surfaces. This eliminates the need for multiple independent mounting brackets. The space formed by the side plates and the mounting plate significantly simplifies the overall internal structure of the battery and efficiently saves internal installation space. The side plates are securely connected to the separator via a first connecting plate at the bottom. This improves the overall structural stability of the mounting bracket, while the separator also separates the BMS from the cell modules, effectively reducing the risk of leakage. Furthermore, the wiring channels in the wiring structure and the clearance slots in the separator are mutually compatible, enabling neat wiring of multiple NTC thermistors, avoiding messy tangles, and eliminating the need for additional adjustments to the overall mechanical structure. Simultaneously, the precise contact of multiple NTC thermistors with the surfaces of different cells allows for direct temperature measurement of multiple cells, effectively solving the lag problem of traditional indirect temperature detection and significantly improving temperature measurement accuracy.

[0007] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this application. Attached Figure Description

[0008] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an electrical system diagram of the battery monitoring system according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the BMS mounting bracket according to an embodiment of this application; Figure 3 for Figure 2 A sectional view; Figure 4 for Figure 3 A diagram showing the installation of the BMS main control board and the BMS slave control board.

[0009] Figure label: Mounting plate 100; Mounting structure 101; Mounting column 102; Mounting hole 103; Side plate 200; First connecting plate 201; Cable routing structure 300; cable routing channel 301; cable fastener 302; Partition plate 400; clearance groove 401; second connecting plate 402; horizontal plate 403; vertical plate 404; connecting hole 405; BMS main control board 500; BMS slave control board 600; NTC thermistor 710; control unit 720; air pressure sensor 730; fire extinguishing device 740; alarm module 750; gas detection unit 760. Detailed Implementation

[0010] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0011] In the description of this application, the use of terms such as "first," "second," etc., is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0012] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0013] In the description of this application, it should be noted that, unless otherwise explicitly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0014] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this application, not all embodiments.

[0015] The following is for reference. Figures 1 to 4 This application describes a battery monitoring system and battery pack according to embodiments thereof.

[0016] like Figures 1 to 4 As shown, the battery monitoring system of this application embodiment includes: Mounting plate 100, with mounting structures 101 on the top and bottom surfaces of mounting plate 100 respectively. The two mounting structures 101 are used to mount BMS main control board 500 and BMS slave control board 600 respectively. Two side panels 200 are respectively connected to opposite sides of the mounting plate 100, and the two side panels 200 and the bottom surface of the mounting plate 100 enclose a receiving space. The wiring structure 300 is connected to the side of the mounting plate 100, and the wiring structure 300 is provided with a wiring groove 301 that runs through the top and bottom. The partition 400 is located below the mounting plate 100. The bottom end of the side plate 200 is bent to form a first connecting plate 201. The first connecting plate 201 is attached to the top surface of the partition 400 and connected to the partition 400 by fasteners. The partition 400 is provided with a clearance groove 401 that runs vertically through it. The bottom end of the wiring structure 300 passes through the clearance groove 401. The control unit 720 is located on the BMS main control board 500 or the BMS slave control board 600. Multiple NTC thermistors 710 are disposed on the surface of different battery cells; all NTC thermistors 710 are electrically connected to the control unit 720 through wiring through wiring groove 301.

[0017] In this embodiment, the mounting plate 100 mounts the BMS main control board 500 and the slave control board respectively through the mounting structures 101 on the top and bottom surfaces, eliminating the need for multiple additional independent mounting brackets. Combined with the accommodating space formed by the side plates 200 and the mounting plate 100, it significantly simplifies the overall internal structure of the battery and efficiently saves internal installation space. The side plates 200 are securely connected to the separator 400 through the first connecting plate 201 at the bottom, which improves the overall structural stability of the mounting bracket. At the same time, the separator 400 can also separate the BMS from the cell module, effectively reducing the risk of leakage. Furthermore, the wiring groove 301 of the wiring structure 300 and the clearance groove 401 of the partition 400 are mutually compatible, which not only enables the orderly wiring of multiple NTC thermistors 710, avoiding messy and tangled lines, but also eliminates the need for additional adjustments to the overall mechanical structure. At the same time, the precise contact of multiple NTC thermistors 710 with the surfaces of different battery cells allows for direct temperature measurement of multiple battery cells, effectively solving the lag problem of traditional indirect temperature detection and significantly improving temperature measurement accuracy.

[0018] The mounting plate 100 described above may have a mounting structure 101 on the top surface for mounting the BMS main control board 500, and a mounting structure 101 on the bottom surface for mounting the BMS slave control board 600.

[0019] The aforementioned space is used to accommodate the BMS board below the mounting plate 100.

[0020] The aforementioned wiring structure 300 provides wiring for the high-voltage or low-voltage lines leading out from the BMS main control board 500 and the BMS slave control board 600.

[0021] The aforementioned cable tray 301 is equipped with cable clamps 302, which are used to clamp high-voltage or low-voltage wires against the inner wall of the cable tray 301. For example, multiple cable clamps 302 can be provided in the cable tray 301, and these multiple cable clamps 302 can be arranged vertically. The cable clamps 302 in the cable tray 301 can clamp high-voltage or low-voltage wires against the inner wall of the cable tray 301, reducing the free movement of the high-voltage or low-voltage wires and making cable routing more convenient.

[0022] The aforementioned separator 400 is connected to the battery casing and located above the cell module. The first connecting plate 201 at the bottom of the side plate 200 is attached to the top surface of the separator 400 and connected to the separator 400 by fasteners. This makes it easier to install the mounting plate 100. In addition, the separator 400 can also separate the BMS system from the cell module, reducing the risk of leakage.

[0023] The aforementioned partition 400 is provided with a through-hole 401, allowing the bottom end of the wiring structure 300 to extend into the installation space of the battery cell module. This design makes it easier to route the high-voltage or low-voltage lines connecting the BMS main control board 500, the BMS slave control board 600, and the battery cell module.

[0024] The aforementioned control unit 720 can directly use the core controller of the BMS, reducing costs through reuse.

[0025] The aforementioned control unit 720 can be set independently to improve the stability of heat dissipation control.

[0026] The aforementioned control unit 720 can be made using DSP, microcontroller, ARM, etc., and specifically, the STM32 series can be selected for processing.

[0027] The aforementioned NTC thermistors 710 are used to detect the surface temperature of different cells in the battery module, thereby reducing the probability of false detection caused by detecting a single area.

[0028] In some implementations, reference Figure 3 and Figure 4 As shown, the above-mentioned wiring structure 300 may be provided with multiple wiring grooves 301, and the multiple wiring grooves 301 are arranged along the length direction of the side of the mounting plate 100 where the wiring structure 300 is provided.

[0029] In addition to being connected to each other via wiring, the BMS main control board 500 and the BMS slave control board 600 are also typically connected to the battery cell module via wiring. The BMS slave control board 600 is also connected to the battery cell module via wiring. The wiring structure 300 is provided with multiple wiring slots 301, which are arranged along the length of the side of the mounting plate 100 where the wiring structure 300 is provided. This makes it easier to route various types of wiring and makes wiring more convenient.

[0030] In some implementations, reference Figure 3 and Figure 4 As shown, the wiring structure 300 abuts against the inner wall of the relief groove 401.

[0031] In this embodiment, this configuration reduces vibration of the wiring structure 300 during vehicle operation, resulting in a more stable connection and a longer service life.

[0032] In some implementations, reference Figure 3 and Figure 4 As shown, at least one cable clamp 302 in the cable tray 301 is located below the partition 400. For example, multiple cable clamps 302 may be provided in the cable tray 301, with the lowest cable clamp 302 located below the partition 400 and the remaining cable clamps 302 located above the partition 400.

[0033] In this embodiment, this configuration makes it easier to route the high-voltage or low-voltage lines connecting the BMS main control board 500, the BMS slave control board 600, and the battery cell module.

[0034] In some implementations, reference Figure 2 As shown, the partition 400 has a second connecting plate 402 on both sides opposite to each other. The second connecting plate 402 is bent outward to form a horizontal plate 403. The end of the horizontal plate 403 away from the partition 400 is bent upward to form a vertical plate 404. The vertical plate 404 is provided with a connecting hole 405.

[0035] The horizontal plate 403 can be set horizontally, the vertical plate 404 can be set vertically, and the portion of the second connecting plate 402 between the horizontal plate 403 and the partition plate 400 can be set vertically. The vertical plate 404 is provided with a connecting hole 405 and is connected to the side wall of the battery casing through the connecting hole 405 by fasteners.

[0036] In this embodiment, the partition 400 has a second connecting plate 402 on both sides opposite to each other, and the second connecting plate 402 has a bent plate structure. In this way, it can undergo elastic deformation, which not only makes it easier to connect the battery casing, but also makes it suitable for situations where there are slight errors in the size of the battery casing. In addition, it can absorb vibration energy, reduce the vibration of the BMS system, and make the BMS system have a longer service life.

[0037] In some embodiments, the battery monitoring system described above further includes: The air pressure sensor 730 is mounted on the horizontal plate 403 and is electrically connected to the control unit 720.

[0038] In this embodiment, the air pressure sensor 730 is placed on the horizontal plate 403, which can accurately capture changes in air pressure inside the battery casing. At the same time, relying on the elastic deformation characteristics of the bending structure of the second connecting plate 402, vibration can be avoided from interfering with the sensor, ensuring its detection stability. Furthermore, the sensor is electrically connected to the control unit 720, which can transmit air pressure data in real time, helping to provide timely warnings of abnormal air pressure in the casing and further improving the safety of battery use.

[0039] In some embodiments, the barometric pressure sensor 730 is disposed on the cross plate 403 near the control unit 720.

[0040] In this embodiment, the barometric pressure sensor 730 is placed on the horizontal plate 403 near the control unit 720, which can shorten the signal line distance between the sensor and the control unit 720, reduce line interference and wiring complexity; at the same time, the horizontal plate 403 relies on the elastic deformation energy of the second connecting plate 402 to buffer vibration and ensure stable sensor detection.

[0041] In some embodiments, the battery monitoring system described above further includes: The fire extinguishing device 740 is located inside the battery casing.

[0042] In this embodiment, by setting up a fire extinguishing device 740, fire can be extinguished when any NTC thermistor 710 detects that the cell temperature exceeds the high temperature threshold, thereby reducing the impact of the fire.

[0043] In some embodiments, the fire extinguishing device 740 includes: The thermal aerosol fire extinguisher is housed within the casing and electrically connected to the control unit 720.

[0044] In this embodiment, by setting up a thermal aerosol fire extinguisher, fire can be extinguished when any NTC thermistor 710 detects that the cell temperature exceeds the high temperature threshold, or when the pressure sensor 730 detects that the pressure inside the box exceeds the high pressure threshold.

[0045] In some embodiments, the battery monitoring system described above further includes: The alarm module 750 is electrically connected to the control unit 720.

[0046] In this embodiment, by setting the alarm module 750, proactive early warning can be achieved. Before the danger escalates, for example, when a fire just begins, the user can be promptly reminded to stay away from the two-wheeled vehicle to avoid casualties.

[0047] The aforementioned alarm module 750 can be a commercially available, mature alarm product, such as an audible and visual alarm. Alternatively, it can be a wireless communication module, which can use wireless communication to trigger an alarm. Understandably, when using a wireless communication module, it can be reused with the wireless communication module built into the battery to reduce costs.

[0048] In some embodiments, the battery monitoring system described above further includes: The gas detection unit 760 is electrically connected to the control unit 720. The gas detection unit 760 is disposed inside the housing and is used to detect the gas composition of the housing.

[0049] In this embodiment, the gas detection unit 760 can be used to detect the gas composition of the chamber, and thus can actively issue an early warning when a large amount of organic gas appears in the chamber, avoiding the problem that the temperature sensor and pressure sensor 730 cannot detect the danger in time in some low-heat slow combustion situations.

[0050] In some embodiments, two wiring structures 300 are provided, located at both ends of the same side of the mounting plate 100, and the two wiring structures 300 are respectively for high-voltage lines and low-voltage lines.

[0051] In this embodiment, the wiring structure 300 on one side is used to run high-voltage wires, i.e., circuits used to charge the cell modules of the battery pack, while the wiring structure 300 on the other side is used to run low-voltage wires, i.e. signal lines used to monitor parameters such as battery temperature. This avoids interference between high and low voltage wires, which could affect the function of the BMS system and thus the normal use of the battery.

[0052] In some embodiments, the mounting structure 101 includes a plurality of mounting posts 102 connected to the top or bottom surface of the mounting plate 100, and the end of the mounting post 102 away from the mounting plate 100 is provided with a mounting hole 103. The BMS main control board 500 and the BMS slave control board 600 are connected to the mounting posts 102 by fasteners inserted into the mounting holes 103.

[0053] refer to Figures 2 to 4As shown, the mounting structure 101 includes multiple mounting posts 102, which not only makes it easier to install the BMS main control board 500 and the BMS slave control board 600, but also allows for a gap between the BMS main control board 500, the BMS slave control board 600 and the mounting plate 100, that is, a heat dissipation space, thereby improving the heat dissipation effect of the battery and preventing damage to the internal structure of the battery, especially the BMS system, due to high temperature.

[0054] This application also provides a battery pack that includes the battery monitoring system described above.

[0055] It should be noted that since the battery pack can adopt all the technical solutions of the battery monitoring system mentioned above, it has at least all the beneficial effects brought by the technical solutions of the battery monitoring system mentioned above. These additional beneficial effects will not be elaborated here.

[0056] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0057] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A battery monitoring system, characterized in that, include: The mounting plate has mounting structures on its top and bottom surfaces, and the two mounting structures are used to mount the BMS main control board and the BMS slave control board, respectively. Two side plates are respectively connected to opposite sides of the mounting plate, and the two side plates and the bottom surface of the mounting plate enclose a receiving space. A wiring structure is connected to the side of the mounting plate, and the wiring structure is provided with a wiring groove that runs through the top and bottom. A partition is located below the mounting plate. The bottom end of the side plate is bent to form a first connecting plate. The first connecting plate is attached to the top surface of the partition and connected to the partition by fasteners. The partition is provided with a clearance groove that runs vertically through it. The bottom end of the wiring structure passes through the clearance groove. The control unit is located on the BMS main control board or the BMS slave control board; Multiple NTC thermistors are disposed on the surface of different battery cells; all of the multiple NTC thermistors are electrically connected to the control unit through the wiring channels.

2. The battery monitoring system according to claim 1, characterized in that, The partition has a second connecting plate on both sides opposite to it. The second connecting plate is bent outward to form a horizontal plate. The end of the horizontal plate away from the partition is bent upward to form a vertical plate. The vertical plate has a connecting hole.

3. The battery monitoring system according to claim 2, characterized in that, Also includes: A pressure sensor is mounted on the horizontal plate and electrically connected to the control unit.

4. The battery monitoring system according to claim 3, characterized in that, The air pressure sensor is mounted on the horizontal plate near the control unit.

5. The battery monitoring system according to claim 1, characterized in that, Also includes: The fire extinguishing device is located inside the battery pack housing.

6. The battery monitoring system according to claim 5, characterized in that, The fire extinguishing device includes: A thermal aerosol fire extinguisher is installed inside the housing and electrically connected to the control unit.

7. The battery monitoring system according to claim 1, characterized in that, Also includes: The alarm module is electrically connected to the control unit.

8. The battery monitoring system according to claim 1, characterized in that, Also includes: A gas detection unit is electrically connected to the control unit and is disposed inside the battery pack housing to detect the gas composition of the housing.

9. The battery monitoring system according to claim 1, characterized in that, The wiring structure is provided in two parts, which are located at both ends of the same side of the mounting plate. The two wiring structures are respectively used for high-voltage lines and low-voltage lines.

10. A battery pack, characterized in that, Includes the battery monitoring system as described in any one of claims 1 to 9.

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