Battery pack

Abstract

This application discloses a battery pack in which, when connecting battery cells in series, a temperature-sensing optical fiber is first placed between adjacent battery cells. Then, the two tabs of the tab assembly are brought together, and subsequently, two mounting strips of the clamping mechanism are mounted on the mounting frame along a first direction, clamping the opposite sides of the tabs. This ensures that the two tabs remain in a close, conductive state while simultaneously completing the placement of the temperature-sensing optical fiber. This solution allows direct detection of the battery cell surface temperature via the temperature-sensing optical fiber, while the clamping mechanism enables series connection of the battery cells. This not only facilitates rapid battery cell installation but also provides convenience for the placement of the temperature-sensing optical fiber, improving overall operational efficiency and the accuracy of temperature monitoring.

Description

Technical Field

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

[0002] Currently, most electric two-wheeler batteries use a single temperature sensor inside the battery box to monitor the ambient temperature and indirectly determine the cell temperature. However, in practice, a cell malfunction may not immediately cause a rapid rise in ambient temperature. In such cases, existing detection methods are prone to missing detections, leading to delayed alarms or delayed fire suppression when cell abnormalities are not detected in time. This can result in property damage and, in extreme cases, even personal injury, posing a significant safety hazard. Utility Model Content

[0003] This application aims to propose a battery pack that can directly detect the temperature of the battery cells.

[0004] The battery pack provided in this application embodiment includes a housing and components disposed within the housing: Mounting rack; Multiple battery cells are disposed on the mounting frame and arranged along a first direction. A tab assembly is provided between two adjacent battery cells. The tab assembly includes two mating tabs, and the two tabs are respectively connected to the two adjacent battery cells. The clamping mechanism includes two clamping parts, each clamping part including a mounting strip and a plurality of clamping strips. The mounting strip is detachably mounted to the mounting frame and extends along the first direction. The plurality of clamping strips are connected to the mounting strip and arranged along the first direction. The plurality of clamping strips of the two clamping parts correspond one-to-one, and the corresponding two clamping strips are respectively attached to the opposite sides of the two tabs of the tab assembly. The temperature-sensing optical fiber is disposed in the gap between any two adjacent battery cells; The control unit is electrically connected to the temperature-measuring optical fiber.

[0005] In this embodiment of the battery pack, when connecting battery cells in series, the temperature-sensing optical fiber can be placed between adjacent battery cells first, then the two tabs of the tab assembly can be attached together, and then the two mounting strips of the clamping mechanism can be mounted on the mounting frame along the first direction, so that the corresponding clamping strips clamp the opposite sides of the tabs. This ensures that the two tabs remain in a contact and conductive state, while simultaneously completing the placement of the temperature-sensing optical fiber. This solution can directly detect the surface temperature of the battery cells through the temperature-sensing optical fiber, and at the same time realize the series connection of battery cells with the help of the clamping mechanism. This not only facilitates the rapid installation of battery cells, but also provides convenience for the placement of the temperature-sensing optical fiber, improving the overall operating efficiency and the accuracy of temperature monitoring.

[0006] 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 the application. Attached Figure Description

[0007] 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 pack according to an embodiment of this application; Figure 2 This is a schematic diagram of the battery pack structure according to an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the housing according to an embodiment of this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the contact of the two tabs of the tab assembly according to an embodiment of this application; Figure 6 This is a schematic diagram of the operation of the clamping part according to an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the protective plate according to an embodiment of this application.

[0008] Figure label: Mounting bracket 100; housing 101; insulating top plate 102; protective plate 103; wiring hole 104; isolation strip 105; Battery cell 200; electrode assembly 201; electrode 202; bending sheet 203; Clamping mechanism 300; clamping part 301; mounting strip 302; clamping bar 303; limiting part 304; clamping groove 305; Temperature sensing fiber optic 401, barometric pressure sensor 402; Fire extinguishing equipment 500; Control unit 601; Alarm module 602. Detailed Implementation

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] The following is for reference. Figures 1 to 7 A battery pack according to an embodiment of this application is described.

[0015] like Figures 1 to 7 As shown, the battery pack of this application embodiment includes: Including the enclosure and all components housed within it: Mounting bracket 100; Multiple battery cells 200 are mounted on a mounting frame 100 and arranged along a first direction. A tab 202 assembly 201 is provided between two adjacent battery cells 200. The tab 202 assembly 201 includes two tabs 202 that are in contact with each other. The two tabs 202 are respectively connected to two adjacent battery cells 200. The clamping mechanism 300 includes two clamping parts 301. Each clamping part 301 includes a mounting strip 302 and a plurality of clamping strips 303. The mounting strip 302 is detachably mounted on the mounting frame 100 and extends along a first direction. The plurality of clamping strips 303 are connected to the mounting strip 302 and arranged along the first direction. The plurality of clamping strips 303 of the two clamping parts 301 correspond one-to-one. The two corresponding clamping strips 303 are respectively attached to the opposite sides of the two tabs 202 of the tab 202 assembly 201. The temperature-sensing optical fiber 401 is placed in the gap between any two adjacent battery cells 200; The control unit 601 is electrically connected to the temperature measuring optical fiber 401.

[0016] In this embodiment, when connecting the battery cells 200 in series, the temperature-sensing optical fiber 401 can be placed between adjacent battery cells 200 first, then the two tabs 202 of the tab assembly 202 can be attached together. Subsequently, the two mounting strips 302 of the clamping mechanism 300 are mounted on the mounting frame 100 along the first direction, so that the corresponding clamping strips 303 clamp the opposite sides of the tabs 202. This ensures that the two tabs 202 remain in a contact and conductive state while simultaneously arranging the temperature-sensing optical fiber 401. This solution allows direct detection of the surface temperature of the battery cells 200 via the temperature-sensing optical fiber 401, while simultaneously achieving series connection of the battery cells 200 using the clamping mechanism 300. This not only facilitates rapid installation of the battery cells 200 but also provides convenience for the arrangement of the temperature-sensing optical fiber 401, improving overall operational efficiency and the accuracy of temperature monitoring.

[0017] The thickness direction of the aforementioned battery cell 200 can be a first direction, and the width direction of the battery cell 200 can be a second direction perpendicular to the first direction. The tabs 202 can extend along the second direction. The battery cell 200 located in the middle can be connected to two tabs 202. The two tabs 202 of the middle battery cell 200 can be arranged along the second direction. The two outermost battery cells 200 can be provided with one tab 202. The battery cell 200 located in the middle is attached to the corresponding tabs 202 on the adjacent battery cells 200 on both sides through its two tabs 202. The battery cell 200 located in the outermost side is attached to the corresponding tab 202 on the neighboring battery cell 200 through its one tab 202.

[0018] There can be two clamping mechanisms 300, and the two clamping mechanisms 300 can be arranged along the second direction to correspond to the positions of the two tabs 202 of the battery cell 200 located in the middle.

[0019] The aforementioned clamping strip 303 can extend along the second direction.

[0020] The aforementioned control unit 601 can directly use the core controller of the charging terminal, thereby reducing costs through reuse.

[0021] The aforementioned control unit 601 can be set up independently to improve the stability of heat dissipation control.

[0022] The control unit 601 mentioned above can be a DSP, microcontroller, ARM, etc., and specifically an STM32 series processor can be selected.

[0023] At least one temperature-sensing optical fiber 401 is provided, and each temperature-sensing optical fiber 401 is arranged between two adjacent battery cells 200, thereby enabling direct detection of the surface temperature of the battery cells 200 on both sides. Simultaneously, the temperature-sensing optical fiber 401 can detect the temperature at multiple points, achieving multi-point monitoring of the surface of the battery cells 200 to a certain extent. Furthermore, due to the extremely small size of the temperature-sensing optical fiber 401, temperature detection can be directly performed using the gaps at the top and bottom of the battery cells 200.

[0024] When there are multiple temperature-sensing optical fibers 401, temperature-sensing optical fibers 401 can be set between each group of adjacent battery cells 200 to achieve effective monitoring of all battery cells 200.

[0025] It is understandable that when an excessively high temperature is detected at a certain point, an alarm can be triggered, and at the same time, the specific temperature-sensing fiber optic cable 401 number and the specific location information within the temperature-sensing fiber optic cable 401 can be recorded and uploaded.

[0026] In some embodiments, there are multiple temperature-sensing optical fibers 401, which are arranged in the gaps between multiple sets of adjacent battery cells 200.

[0027] In this embodiment, by setting temperature-measuring optical fibers 401 in the gaps between multiple groups of adjacent battery cells 200, the surface temperature of multiple battery cells 200 can be directly detected, thereby reducing the probability of fire caused by missed detection.

[0028] In some implementations, the temperature-sensing optical fiber 401 is arranged near the bottom of the enclosure.

[0029] In this embodiment, the temperature measuring fiber 401 is arranged close to the bottom of the housing, which can effectively utilize the gap at the bottom of the battery cell 200 to complete the arrangement of the temperature measuring fiber 401 and reduce the impact of the temperature measuring fiber 401 on the flatness of the battery cell 200 after installation.

[0030] In some implementations, reference Figure 1 The aforementioned battery pack also includes: The air pressure sensor 402 is installed inside the housing and is electrically connected to the control unit 601.

[0031] In this embodiment, the air pressure sensor 402 can detect the air pressure inside the box, which can effectively reduce the occurrence of situations where alarms and protection operations cannot be triggered in time under the condition of low-heat combustion of the battery cell 200.

[0032] In some implementations, reference Figure 1 The aforementioned battery pack also includes: The fire extinguishing device 500 is installed inside the box.

[0033] In this embodiment, by setting up a fire extinguishing device 500, fire can be extinguished when the temperature measuring fiber 401 detects that the surface temperature of the battery cell 200 exceeds the high temperature threshold, thereby reducing the impact of the fire.

[0034] In some embodiments, the battery pack includes: A thermal aerosol fire extinguisher is installed inside the box and electrically connected to the control unit 601.

[0035] In this embodiment, by setting up a thermal aerosol fire extinguisher, fire can be extinguished when the temperature measuring fiber 401 detects that the surface temperature of the battery cell 200 exceeds the high temperature threshold, or when the pressure sensor 402 detects that the pressure chute inside the box exceeds the high pressure threshold.

[0036] In some implementations, reference Figure 1 The aforementioned battery pack also includes: The alarm module 602 is electrically connected to the control unit 601.

[0037] In this embodiment, the alarm module 602 can be set up to achieve active early warning, which can promptly remind users to stay away from the two-wheeled vehicle before the danger escalates, for example, when a fire just starts, so as to avoid casualties.

[0038] The alarm module 602 mentioned above 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. It's understandable that, when using a wireless communication module, it can be reused with the wireless communication module built into the battery to reduce costs.

[0039] In some implementations, reference Figures 3 to 6 As shown, both the tab 202 and the clamping bar 303 extend along a second direction perpendicular to the first direction. The two mounting bars 302 of the clamping mechanism 300 are arranged along the second direction and are located at both ends of the tab 202 along the second direction.

[0040] In this embodiment, both the tab 202 and the clamping bar 303 extend along a second direction perpendicular to the first direction. This results in a better clamping and fixing effect on the tab 202. In addition, the two mounting bars 302 of the clamping mechanism 300 are arranged along the second direction and are located at both ends of the tab 202 along the second direction. This avoids the situation where the ends of the two clamping bars 303 are located near the same end of the tab 202, resulting in a loose clamping. This further improves the clamping effect on the tab 202.

[0041] In some implementations, reference Figure 6 As shown, the clamping part 301 also includes: Multiple limiting parts 304 are connected to the mounting strip 302 and arranged along the first direction; In this case, multiple limiting parts 304 on the same clamping part 301 correspond one-to-one with multiple clamping strips 303, and a clamping groove 305 is formed between the limiting part 304 and the corresponding clamping strip 303. The end of the clamping strip 303 on another clamping part 301 is inserted into the clamping groove 305.

[0042] In this embodiment, the ends of the two clamping strips 303 are inserted into the corresponding clamping grooves 305. This completely avoids the situation where the ends of the clamping strips 303 bend outwards due to the lack of restraint, thereby making the clamping strips 303 clamp the tabs 202 more effectively.

[0043] In some implementations, reference Figure 5 As shown, the ends of the two tabs 202 of the electrode assembly 201 that are away from the battery cell 200 are bent in opposite directions to form bending pieces 203. The two bending pieces 203 are attached to each other and clamped between the corresponding two clamping strips 303.

[0044] In this embodiment, the tab 202 is bent to form a bent piece 203. The thickness direction of the bent piece 203 can be vertical, that is, two bent pieces 203 can be arranged vertically. The corresponding two clamping strips 303 can be arranged vertically and clamp the bent pieces 203 of the two tabs 202 of the tab 202 assembly 201. This arrangement not only makes it easier for the clamping strips 303 to hold the tabs, but also reduces the possibility of the tabs 202 slipping out of the clamping strips 303, making the assembly more stable.

[0045] In some implementations, reference Figures 2 to 4 As shown, the mounting bracket 100 includes: The housing 101 contains the battery cell 200. An insulating top plate 102 is located at the top of the housing 101. The insulating top plate 102 has multiple through holes running vertically through it. The tab 202 assembly 201 passes through the through holes. The mounting strip 302 is attached to the upper surface of the insulating top plate 102 and is connected to the insulating top plate 102 by fasteners.

[0046] The aforementioned insulating top plate 102 can be installed on the top of the housing 101 by fasteners. The through holes can correspond one-to-one with the tab 202 assembly 201. The size of the through holes can be adapted to the size of the tab 202 assembly 201, and the tab 202 assembly 201 can be inserted through the through holes.

[0047] In this embodiment, the insulating top plate 102 separates the electrical connection points of the tab 202 assembly 201 from the battery cell 200. The insulating top plate 102 can be made of an electrically insulating material, thereby reducing the risk of short circuits and leakage, resulting in better safety. Furthermore, after the tab 202 passes through the through-hole, it is clamped by the clamping strip 303, ensuring that all battery cells 200 are connected to the insulating top plate 102, thus making the battery pack structure more stable.

[0048] In some implementations, reference Figure 2 and Figure 7 As shown, the two corresponding clamping strips 303 are arranged vertically, and the mounting bracket 100 also includes: The protective plate 103 is located at the top of the housing 101 and covers the insulating top plate 102. The protective plate 103 has multiple through-holes 104 for wiring. The bottom surface of the protective plate 103 has multiple abutting parts, which abut against the top surface of the upper clamping strip 303 of the two corresponding clamping strips 303.

[0049] The aforementioned abutting part can abut against the middle of the top surface of the upper clip 303 of the two corresponding clips 303.

[0050] In this embodiment, a protective plate 103 is provided to further protect the clamping mechanism 300 and the tab 202 assembly 201. The protective plate 103 can also be made of electrically insulating material, further reducing the risk of short circuits and leakage. The protective plate 103 has multiple wiring holes 104 for convenient wiring. Furthermore, the bottom surface of the protective plate 103 has multiple abutment portions that abut against the top surface of the upper clamping strip 303 of the two corresponding clamping strips 303. This allows for compression of the clamping strip 303 except at both ends, resulting in better clamping of the tab 202 and thus a better electrical connection between the two tabs 202.

[0051] In some implementations, reference Figure 3 and Figure 4 As shown, an isolation strip 105 is provided on the upper surface of the insulating top plate 102 between two adjacent tab 202 assemblies 201.

[0052] The aforementioned isolation strip 105 may include two sets, and the two sets of isolation strips 105 may be arranged along the second direction, while the same set of isolation strips 105 may be arranged along the first direction.

[0053] In this embodiment, the isolation strip 105 not only limits the tab 202 assembly 201 and the corresponding two clamping strips 303, making the clamping strips 303 hold the tab 202 better, but also separates two adjacent tab 202 assemblies 201, further reducing the risk of short circuit and leakage.

[0054] In some implementations, reference Figure 2 As shown, the middle battery cell 200 is connected to two tabs 202 arranged along the second direction, and the clamping mechanism 300 is provided with two corresponding tabs, arranged along the second direction.

[0055] In this embodiment, two clamping mechanisms 300 are provided, and the two clamping mechanisms 300 can clamp and fix the corresponding tab 202 assembly 201.

[0056] 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 pack, characterized in that, Including the enclosure and all of the following housed within it: Mounting rack; Multiple battery cells are disposed on the mounting frame and arranged along a first direction. A tab assembly is provided between two adjacent battery cells. The tab assembly includes two mating tabs, and the two tabs are respectively connected to the two adjacent battery cells. The clamping mechanism includes two clamping parts, each clamping part including a mounting strip and a plurality of clamping strips. The mounting strip is detachably mounted to the mounting frame and extends along the first direction. The plurality of clamping strips are connected to the mounting strip and arranged along the first direction. The plurality of clamping strips of the two clamping parts correspond one-to-one, and the corresponding two clamping strips are respectively attached to the opposite sides of the two tabs of the tab assembly. The temperature-sensing optical fiber is disposed in the gap between any two adjacent battery cells; The control unit is electrically connected to the temperature-measuring optical fiber.

2. The battery pack according to claim 1, characterized in that, The temperature-sensing optical fiber consists of multiple fibers, which are arranged in the gaps between multiple sets of adjacent battery cells.

3. The battery pack according to claim 1 or 2, characterized in that, The temperature-measuring optical fiber is positioned near the bottom of the enclosure.

4. The battery pack according to claim 1, characterized in that, Also includes: A pressure sensor is installed inside the housing and is electrically connected to the control unit.

5. The battery pack according to claim 1, characterized in that, Also includes: A fire extinguishing device is installed inside the box.

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

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

8. The battery pack according to claim 1, characterized in that, Both the electrode tab and the clamping bar extend along a second direction perpendicular to the first direction. The two mounting bars of the clamping mechanism are arranged along the second direction and are located at both ends of the electrode tab along the second direction.

9. The battery pack according to claim 8, characterized in that, The clamping part further includes: Multiple limiting parts are connected to the mounting strip and arranged along the first direction; In this configuration, multiple limiting portions on the same clamping part correspond one-to-one with multiple clamping strips, and a clamping groove is formed between the limiting portion and the corresponding clamping strip. The end of the clamping strip on another clamping part is inserted into the clamping groove.

10. The battery pack according to claim 9, characterized in that, The ends of the two tabs of the electrode assembly that are away from the battery cell are bent in opposite directions to form bent pieces, and the two bent pieces are fitted together and clamped between the corresponding two clamping strips.

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