Composite device of two-wheeled vehicle lithium battery module and battery module

Abstract

The embodiment of the utility model provides a composite device of a lithium battery module of a two-wheeled vehicle and the battery module, and belongs to the technical field of lithium batteries. The composite device comprises: an upper cover; the BMS protection plate is arranged below the upper cover and is used for monitoring and controlling the state of the battery module; the PCB acquisition board is arranged below the BMS protection board and is used for integrating circuits; the Tracker module is arranged on the BMS protection board and is used for carrying out communication and data exchange with the outside; the cover plate is arranged below the PCB acquisition board and is used for limiting the top of the battery module; the lower shell is arranged below the cover plate and is used for accommodating the battery module; the insulating board is arranged among the PCB acquisition board, the BMS protection board and the Tracker module and is used for insulation; and the water inlet detection sensor is arranged on the battery module and the lower shell and is used for detecting whether water enters the battery module or not. The device is simple to assemble, has the functions of current acquisition, voltage acquisition, communication and the like, and is low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and in particular to a composite device of a lithium battery module for a two-wheeled vehicle and a battery module. Background Art

[0002] Compared with lead-acid batteries, lithium batteries have obvious advantages such as light weight, small size and long service life under the same driving range. With the rapid development of electric vehicles, lithium batteries have an increasingly larger market share in the field of two-wheeled vehicles due to their obvious performance advantages. However, the use conditions of two-wheeled electric vehicles, especially shared or battery-swapped two-wheeled electric vehicles, are complex, and the functions and requirements of the battery pack are high. In addition to the conventional current collection, voltage collection, temperature collection, charging and discharging and protection functions, the battery pack is required to have fault diagnosis, wireless radio frequency identification, communication, remote control, GPS real-time positioning, Bluetooth, vibration detection, ventilation and pressure relief, waterproof, water ingress detection and other functions. The battery pack is required to be able to exchange data with the server platform and mobile phone APP through the network. Utility Model Content

[0003] In order to achieve the above-mentioned purpose, the utility model provides a composite device and a battery module for a two-wheeled vehicle lithium battery module, which solves the requirements that the lithium battery pack needs to have conventional current collection, voltage collection, temperature collection, charging and discharging and protection functions as well as fault diagnosis, wireless radio frequency identification, communication, remote control, GPS real-time positioning, Bluetooth, vibration detection, ventilation and pressure relief, waterproof, water ingress detection and other functions.

[0004] In order to achieve the above-mentioned object, the present invention provides a composite device of a two-wheeled vehicle lithium battery module, the composite device comprising:

[0005] Upper cover;

[0006] A BMS protection board is disposed below the upper cover and is used to monitor and control the status of the battery module;

[0007] PCB acquisition board, arranged below the BMS protection board, for integrated circuits;

[0008] Tracker module, arranged on the BMS protection board, for communicating and exchanging data with the outside;

[0009] A cover plate, disposed below the PCB acquisition board, for limiting the top of the battery module;

[0010] A lower housing, disposed below the cover plate, for accommodating the battery module;

[0011] An insulating board is provided between the PCB acquisition board, the BMS protection board and the Tracker module for insulation;

[0012] The water inlet detection sensor is arranged on the battery module and the lower shell, and is used to detect whether water has entered the battery module.

[0013] Optionally, the lower housing comprises:

[0014] case;

[0015] A first adhesive groove is provided on a contact surface between the shell and the upper cover, wherein the first adhesive groove is filled with structural adhesive for connecting the shell and the upper cover;

[0016] A first protrusion is arranged on the outer wall of the housing, and a first through hole is provided on the first protrusion for accommodating a wiring harness of the battery module;

[0017] A second protrusion is provided on the contact surface between the housing and the cover plate and the PCB acquisition board, and is used for engaging with the cover plate and the PCB acquisition board to limit the position of the cover plate and the PCB acquisition board;

[0018] A first reinforcing rib, arranged on the inner wall of the shell;

[0019] A second reinforcing rib is disposed in the middle of the shell, and a first groove is provided on the second reinforcing rib;

[0020] A third reinforcing rib is arranged on the outer wall of the shell;

[0021] The first connector is arranged on the outer wall of the shell and is used for communicating with the outside.

[0022] Optionally, the upper cover comprises:

[0023] A first plate body;

[0024] A boss is provided on the contact surface between the first plate and the shell, and the boss cooperates with the first glue groove to achieve sealing;

[0025] A third protrusion is arranged on the side of the inner wall of the first plate body, and the third protrusion abuts against the insulating plate and the PCB acquisition board to prevent the insulating plate or the PCB acquisition board from failing due to vibration;

[0026] A pressure relief valve, the pressure relief valve is clamped with the first plate body, and a first sealing ring is provided on the pressure relief valve;

[0027] A wire outlet hole is provided on the outer wall of the first plate body, the wire outlet hole is used to pass the wire harness of the battery module through the wire outlet hole, and a rubber ring is provided between the wire outlet hole and the wire harness of the battery module;

[0028] A wire groove is provided on the outer wall of the first plate body, the entrance of the wire groove is provided at the wire outlet hole, and is used to guide the wire harness from the wire outlet hole of the battery module to the other end of the wire outlet hole away from the battery module;

[0029] A fixing plate, arranged near the wire trough, for fixing the wire harness in the wire trough;

[0030] A second glue groove is provided on a contact surface between the first plate and the housing, and the second glue groove is filled with structural glue for sealing the wire outlet hole;

[0031] A glue blocking plate is arranged near the outlet hole, and the glue blocking plate cooperates with the opening of the anti-rubber ring to prevent the structural glue in the second glue groove from overflowing;

[0032] The fourth reinforcing rib is arranged on the outer wall of the first plate body.

[0033] Optionally, the cover plate includes:

[0034] A second plate;

[0035] A plurality of limiting ribs are evenly arranged on the back side of the second plate body and are used to limit the top of the battery module;

[0036] A second groove is provided on a side of the second plate body and is used for engaging with the second protrusion to limit the position of the second plate body;

[0037] A fixing ring, disposed on a side of the second plate away from the second groove, for fixing a wiring harness of the battery module;

[0038] A waist-shaped hole, provided on the second plate and located between two adjacent limiting ribs, for leaking out the pole of the battery module;

[0039] A mounting hole is provided on the second board body, and the mounting hole is connected to the PCB acquisition board, the BMS protection board, and the Tracker module by screws;

[0040] An exhaust hole is provided just above the explosion-proof valve of the battery module and is used to exhaust the gas generated by the battery module;

[0041] A positioning column, disposed on the second plate body, for positioning the BMS protection plate;

[0042] A limiting column, arranged on the second plate body, for limiting the insulating plate and the PCB collection board;

[0043] The process hole is arranged on the second plate body and is used to limit the shape of the second plate body.

[0044] Optionally, the upper cover is provided with a PCB acquisition board mounting hole, a BMS protection board mounting hole and a Tracker module mounting hole, and the PCB acquisition board, the BMS protection board, the Tracker module and the upper cover are connected with screws.

[0045] Optionally, the thickness of the first reinforcing rib, the second reinforcing rib, the third reinforcing rib and the fourth reinforcing rib ranges from 1.5 to 2.5 mm.

[0046] Optionally, the PCB acquisition board includes:

[0047] The third plate;

[0048] A second connector is disposed on the third board;

[0049] A third groove is provided on the side of the third plate body, and the third groove is engaged with the second protrusion to limit the PCB acquisition board;

[0050] A pole piece is arranged on the third plate and located above the battery module, and the pole piece is connected to the pole of the battery module.

[0051] On the other hand, the utility model provides a battery module, which includes any of the above-mentioned composite devices and a battery module.

[0052] Through the above technical scheme, the utility model provides a composite device and battery module of a two-wheeled vehicle lithium battery module, which seals the battery module through the upper cover and the lower shell, monitors and controls the state of the battery module through the BMS protection board, communicates and exchanges data with the outside through the PCB acquisition board integrated circuit and the Tracker module, limits the top of the battery module with the cover plate, uses an insulating plate to ensure the insulation of the device, and uses a water inlet detection sensor to detect whether the battery module has water inlet. Compared with the prior art, the utility model has the functions of current collection, voltage collection, temperature collection, charge and discharge protection, fault diagnosis, wireless radio frequency identification, communication, remote control, GPS real-time positioning, Bluetooth, vibration detection, water inlet detection, etc., and can exchange data with the server platform and mobile phone APP through the network, has good air permeability, simple assembly, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0054] Figure 1 is an exploded view of a composite device according to one embodiment of the present utility model;

[0055] Figure 2 is a schematic diagram of a lower housing according to an embodiment of the utility model;

[0056] Figure 3 is a schematic diagram of a composite device according to one embodiment of the utility model;

[0057] Figure 4 is a schematic diagram of an upper cover according to an embodiment of the utility model;

[0058] Figure 5 is a schematic diagram of an upper cover according to an embodiment of the utility model;

[0059] Figure 6 is a schematic diagram of a cover plate according to an embodiment of the utility model;

[0060] Figure 7 It is a schematic diagram of a PCB acquisition board according to an embodiment of the utility model.

[0061] Description of Reference Numerals

[0062] 1. Upper cover 2. BMS protection board

[0063] 3. PCB acquisition board 4. Tracker module

[0064] 5. Cover plate 6. Lower shell

[0065] 7. Insulation board 61, housing

[0066] 62. First glue groove 63. First protrusion

[0067] 64. Second protrusion 65. First reinforcing rib

[0068] 66, second reinforcement rib 67, third reinforcement rib

[0069] 631, first through hole 662, first groove

[0070] 68. first connector 11. first board

[0071] 12. Boss 13. Third protrusion

[0072] 14. Pressure relief valve 15. Wire outlet

[0073] 16. Wire trough 17. Fixed plate

[0074] 18. Second glue groove 19. Glue baffle

[0075] 20. Fourth reinforcing rib 51. Second plate

[0076] 52. Limiting rib 53. Second groove

[0077] 54. Fixed ring 55. Waist-shaped hole

[0078] 56. Mounting hole 57. Exhaust hole

[0079] 58. Positioning column 59. Limiting column

[0080] 60, process hole 31, third plate

[0081] 32. Second connector 33. Third groove

[0082] 34. Pole DETAILED DESCRIPTION

[0083] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0084] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.

[0085] In addition, if there are descriptions involving "first", "second", etc. in the implementation of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various implementations can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0086] Figure 1It is an exploded view of a composite device according to an embodiment of the utility model. In the figure, the composite device includes an upper cover 1, a BMS protection board 2, a PCB acquisition board 3, a Tracker module 4, an insulating board 7, a cover plate 5, and a lower shell 6. The BMS protection board 2 is arranged below the upper cover 1, and is used to monitor and control the state of the battery module. The PCB acquisition board 3 is arranged below the BMS protection board 2, and is used for integrated circuits. The Tracker module 4 is arranged on the BMS protection board 2, and is used for communicating and exchanging data with the outside. The cover plate 5 is arranged below the PCB acquisition board 3, and is used to limit the top of the battery module. The lower shell 6 is arranged below the cover plate 5, and is used to accommodate the battery module. Further, in order to ensure the insulation performance of the composite device, the composite device also includes an insulating plate 7, and the insulating plate 7 is arranged between the PCB acquisition board 3, the BMS protection board 2, and the Tracker module 4. Furthermore, the composite device also includes a water inlet detection sensor, which is arranged on the battery module and the lower shell 6 to detect whether water has entered the battery module, so as to facilitate timely measures, such as stopping the use of the equipment or performing maintenance and cleaning.

[0087] In this embodiment, the specific structure of the lower housing 6 can be various structures known to those skilled in the art, provided that the structure is sufficient to accommodate the battery module. In one example of the present invention, Figure 2 and Figure 3 As shown, the lower shell 6 includes a shell 61, a first protrusion 63 and a second protrusion 64. The shell 61 is used to accommodate the battery module. The first protrusion 63 is arranged on the outer wall of the shell 61, and the first protrusion 63 is provided with a first through hole 631 for placing the wiring harness of the battery module. The second protrusion 64 is arranged on the contact surface between the shell 61 and the cover plate 5 and the PCB acquisition board 3, and is used to engage with the cover plate 5 and the PCB acquisition board 3 to limit the cover plate 5 and the PCB acquisition board 3. The second protrusion 64 ensures that the cover plate 5 and the PCB acquisition board 3 are correctly positioned and fixed on the shell 61 to prevent them from moving or loosening during use. Further, in order to enhance the strength of the shell 61, reinforcing ribs are provided on the shell 61, specifically, including a first reinforcing rib 65, a second reinforcing rib 66 and a third reinforcing rib 67. The first reinforcing rib 65 is arranged on the inner wall of the shell 61, the second reinforcing rib 66 is arranged on the middle part of the shell 61, and the third reinforcing rib 67 is arranged on the outer wall of the shell 61. When the battery module expands after long-term use, the reinforcing rib can prevent the shell 61 from being broken by the expansion force of the battery module. The second reinforcing rib 66 is provided with a first groove 662, which can not only reduce the weight of the shell 61, but also reduce the limiting surface when the battery module is installed, so as to facilitate the installation of the battery module. In addition, considering the need to connect the upper cover 1 and the lower shell 6 together, a first glue groove 62 is provided on the contact surface of the shell 61 and the upper cover 1, and the first glue groove 62 is filled with structural glue. The use of structural glue realizes a stable connection between the lower shell 6 and the upper cover 1.

[0088] In this embodiment, the specific structure of the upper cover 1 can be various known to those skilled in the art. In one example of the present utility model, Figure 4 and Figure 5 As shown, the upper cover 1 includes a first plate body 11, a boss 12, a third protrusion 13 and a pressure relief valve 14. Among them, the boss 12 is arranged on the contact surface between the first plate body 11 and the shell 61. The boss 12 not only has a guiding function when the upper cover 1 is installed, but also is embedded in the first glue groove 62 of the shell 61 after the upper cover 1 is installed, thereby increasing the contact area between the upper cover 1 and the structural glue. The seal is more reliable through the cooperation between the boss 12 and the first glue groove 62. The third protrusion 13 is arranged on the side of the inner wall of the first plate body 11, and the third protrusion 13 abuts against the insulating plate 7 and the PCB acquisition board 3 to prevent the insulating plate 7 or the PCB acquisition board 3 from failing due to vibration. The pressure relief valve 14 is snap-fitted with the first plate body 11, and a first sealing ring is arranged on the pressure relief valve 14 to ensure the sealing of the device. In one embodiment of the utility model, the upper cover 1 also includes a wire outlet hole 15, a wire groove 16 and a fixing plate 17. The wire outlet hole 15 is arranged on the outer wall of the first plate body 11, the wire groove 16 is arranged on the outer wall of the first plate body 11 and the entrance of the wire groove 16 is arranged at the wire outlet hole 15, the fixing plate 17 is arranged near the wire groove 16, and a rubber ring is arranged between the wire outlet hole 15 and the wiring harness of the battery module. The wiring harness of the battery module passes through the wire outlet hole 15, and then passes through the wire groove 16, and the wiring harness is led from the wire outlet hole 15 of the battery module to the other end of the wire outlet hole 15 away from the battery module, and the wiring harness in the wire groove 16 is fixed by the fixing plate 17. In order to ensure the sealing of the upper cover 1, the upper cover 1 also includes a second glue groove 18 and a glue baffle 19. The second glue groove 18 is arranged on the contact surface between the first plate body 11 and the shell 61, and the second glue groove 18 is filled with structural glue for sealing the wire outlet hole 15. The glue baffle 19 is arranged near the wire outlet hole 15, and the glue baffle 19 cooperates with the rubber ring to prevent the structural glue in the third glue groove from overflowing. Considering the need to increase the structural strength of the first plate body 11, the outer wall of the first plate body 11 is further provided with a fourth reinforcing rib 20. In addition, in order to communicate with the outside, the outer wall of the housing 61 is further provided with a first connector 68.

[0089] In this embodiment, the specific structure of the cover plate 5 can be various known to those skilled in the art. In one example of the present utility model, Figure 6As shown, the cover plate 5 includes a second plate body 51, a plurality of limiting ribs 52, a second groove 53 and a fixing ring 54. Among them, a plurality of limiting ribs 52 are evenly arranged on the back of the second plate body 51, and are used to limit the top of the battery module to prevent the displacement of the battery module. The second groove 53 is arranged on the side of the second plate body 51, and is used to engage with the second protrusion 64 to limit the second plate body 51. The fixing ring 54 is arranged on the side of the second plate body 51 away from the second groove 53, which helps to organize and fix the wiring harness of the battery module. In order to ensure the safety and stability of the battery module, the second plate body 51 is also provided with a waist-shaped hole 55, a mounting hole 56, an exhaust hole 57, a positioning column 58, a limiting column 59 and a process hole 60. The waist-shaped hole 55 is provided on the second plate body 51 and is located between two adjacent limiting ribs 52, and is used to leak out the pole of the battery module. The mounting hole 56 is provided on the second plate body 51, and the mounting hole 56 is connected to the PCB acquisition board 3, the BMS protection board 2, and the Tracker module 4 by screws. The exhaust hole 57 is provided just above the explosion-proof valve of the battery module, and the exhaust hole 57 discharges the gas generated by the battery module to avoid danger caused by excessive internal pressure of the battery. The positioning column 58, the limiting column 59, and the process hole 60 are all provided on the first plate body 11, wherein the positioning column 58 positions the BMS protection board 2, the limiting column 59 limits the insulating board 7 and the PCB acquisition board 3, and the process hole 60 limits the shape of the second plate body 51.

[0090] During the installation of the composite device, considering the convenience of installation, in this embodiment, the upper cover 1 is provided with a mounting hole for the PCB acquisition board 3, a mounting hole for the BMS protection board 2, and a mounting hole for the Tracker module 4. The PCB acquisition board 3, the BMS protection board 2, the Tracker module 4 and the upper cover 1 are connected together by screws.

[0091] In this embodiment, the thickness of the reinforcing ribs can be multiple values ​​known to those skilled in the art. In one embodiment of the present invention, the thickness of the first reinforcing rib 65, the second reinforcing rib 66, the third reinforcing rib 67 and the fourth reinforcing rib 20 ranges from 1.5 to 2.5 mm.

[0092] In this embodiment, the specific structure of the PCB acquisition board 3 can be various ones known to those skilled in the art. In one example of the present utility model, for example Figure 7 As shown, the PCB acquisition board 3 includes a third board body 31, a second connector 32, a third groove 33 and a pole piece. The second connector 32 is arranged on the third board body 31, the third groove 33 is arranged on the side of the third board body 31, the third groove 33 is engaged with the second protrusion 64 to limit the PCB acquisition board 3, the pole piece is arranged on the third board body 31 and is located above the battery module, and the pole piece is connected to the pole of the battery module.

[0093] On the other hand, the utility model provides a battery module, which includes any one of the above-mentioned composite devices and a battery module.

[0094] Through the above technical scheme, the utility model provides a composite device and battery module of a two-wheeled vehicle lithium battery module, which seals the battery module through the upper cover and the lower shell, monitors and controls the state of the battery module through the BMS protection board, communicates and exchanges data with the outside through the PCB acquisition board integrated circuit and the Tracker module, limits the top of the battery module with the cover plate, uses an insulating plate to ensure the insulation of the device, and uses a water inlet detection sensor to detect whether the battery module has water inlet. Compared with the prior art, the utility model has the functions of current collection, voltage collection, temperature collection, charge and discharge protection, fault diagnosis, wireless radio frequency identification, communication, remote control, GPS real-time positioning, Bluetooth, vibration detection, water inlet detection, etc., and can exchange data with the server platform and mobile phone APP through the network, has good air permeability, simple assembly, and low manufacturing cost.

[0095] The optional implementation modes of the utility model examples are described in detail above in conjunction with the accompanying drawings. However, the implementation modes of the utility model are not limited to the specific details in the above implementation modes. Within the technical concept of the implementation modes of the utility model, various simple modifications can be made to the technical solutions of the implementation modes of the utility model. These simple modifications all belong to the protection scope of the implementation modes of the utility model.

[0096] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of the embodiments of the present utility model will not be described separately.

[0097] In addition, various different embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A composite device for a two-wheeled vehicle lithium battery module, characterized in that: The composite device comprises: Upper cover; A BMS protection board is disposed below the upper cover and is used to monitor and control the status of the battery module; PCB acquisition board, arranged below the BMS protection board, for integrated circuits; Tracker module, arranged on the BMS protection board, for communicating and exchanging data with the outside; A cover plate, disposed below the PCB acquisition board, for limiting the top of the battery module; A lower housing, disposed below the cover plate, for accommodating the battery module; An insulating board is provided between the PCB acquisition board, the BMS protection board and the Tracker module for insulation; The water inlet detection sensor is arranged on the battery module and the lower shell, and is used to detect whether water has entered the battery module.

2. The composite device according to claim 1, characterized in that The lower housing comprises: case; A first adhesive groove is provided on a contact surface between the shell and the upper cover, wherein the first adhesive groove is filled with structural adhesive for connecting the shell and the upper cover; A first protrusion is arranged on the outer wall of the housing, and a first through hole is provided on the first protrusion for accommodating a wiring harness of the battery module; A second protrusion is provided on the contact surface between the housing and the cover plate and the PCB acquisition board, and is used for engaging with the cover plate and the PCB acquisition board to limit the position of the cover plate and the PCB acquisition board; A first reinforcing rib, arranged on the inner wall of the shell; A second reinforcing rib is disposed in the middle of the shell, and a first groove is provided on the second reinforcing rib; A third reinforcing rib is arranged on the outer wall of the shell; The first connector is arranged on the outer wall of the shell and is used for communicating with the outside.

3. The composite device according to claim 2, characterized in that The upper cover comprises: A first plate body; A boss is provided on the contact surface between the first plate and the shell, and the boss cooperates with the first glue groove to achieve sealing; A third protrusion is arranged on the side of the inner wall of the first plate body, and the third protrusion abuts against the insulating plate and the PCB acquisition board to prevent the insulating plate or the PCB acquisition board from failing due to vibration; A pressure relief valve, the pressure relief valve is clamped with the first plate body, and a first sealing ring is provided on the pressure relief valve; A wire outlet hole is provided on the outer wall of the first plate body, the wire outlet hole is used to pass the wire harness of the battery module through the wire outlet hole, and a rubber ring is provided between the wire outlet hole and the wire harness of the battery module; A wire groove is provided on the outer wall of the first plate body, the entrance of the wire groove is provided at the wire outlet hole, and is used to guide the wire harness from the wire outlet hole of the battery module to the other end of the wire outlet hole away from the battery module; A fixing plate, arranged near the wire trough, for fixing the wire harness in the wire trough; A second glue groove is provided on a contact surface between the first plate and the housing, and the second glue groove is filled with structural glue for sealing the wire outlet hole; A glue blocking plate is arranged near the outlet hole, and the glue blocking plate cooperates with the opening of the anti-rubber ring to prevent the structural glue in the second glue groove from overflowing; The fourth reinforcing rib is arranged on the outer wall of the first plate body.

4. The composite device according to claim 2, characterized in that: The cover plate comprises: A second plate; A plurality of limiting ribs are evenly arranged on the back side of the second plate body and are used to limit the top of the battery module; A second groove is provided on a side of the second plate body and is used for engaging with the second protrusion to limit the position of the second plate body; A fixing ring, disposed on a side of the second plate away from the second groove, for fixing a wiring harness of the battery module; A waist-shaped hole, provided on the second plate and located between two adjacent limiting ribs, for leaking out the pole of the battery module; A mounting hole is provided on the second board body, and the mounting hole is connected to the PCB acquisition board, the BMS protection board, and the Tracker module by screws; An exhaust hole is provided just above the explosion-proof valve of the battery module and is used to exhaust the gas generated by the battery module; A positioning column, disposed on the second plate body, for positioning the BMS protection plate; A limiting column, arranged on the second plate body, for limiting the insulating plate and the PCB collection board; The process hole is arranged on the second plate body and is used to limit the shape of the second plate body.

5. The composite device according to claim 1, characterized in that The upper cover is provided with a PCB acquisition board mounting hole, a BMS protection board mounting hole, and a Tracker module mounting hole. The PCB acquisition board, the BMS protection board, the Tracker module and the upper cover are connected with screws.

6. The composite device according to claim 3, characterized in that: The thickness of the first reinforcing rib, the second reinforcing rib, the third reinforcing rib and the fourth reinforcing rib ranges from 1.5 to 2.5 mm.

7. The composite device according to claim 2, characterized in that: The PCB acquisition board includes: The third plate; A second connector is disposed on the third board; A third groove is provided on the side of the third plate body, and the third groove is engaged with the second protrusion to limit the PCB acquisition board; A pole piece is arranged on the third plate and located above the battery module, and the pole piece is connected to the pole of the battery module.

8. A battery module, characterized in that: The battery module comprises the composite device as claimed in any one of claims 1 to 7 and a battery module.

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