External wireless transmission thermal runaway detector and battery pack

Abstract

The utility model provides an external wireless transmission thermal runaway detector and a battery pack, the external wireless transmission thermal runaway detector comprises a circuit board module, an internal protective cover arranged on the inner side of the shell wall of the battery pack, and an outer wall sealing gasket, a mounting adapter plate, an outer cover sealing gasket and an outer cover which are sequentially stacked on the outer side of the shell wall of the battery pack, the internal protective cover is fixedly connected with the outer wall sealing gasket and the mounting adapter plate in sequence through internal fixing bolts, the outer cover is fixedly connected with the outer cover sealing gasket and the mounting adapter plate in sequence through outer cover fixing bolts, and the circuit board module is arranged in a cavity formed by the internal protective cover, the mounting adapter plate and the outer cover in a matched mode so as to detect the interior of the battery pack. The circuit board module comprises a battery, a wireless communication transceiver module and a detection component. According to the external wireless transmission thermal runaway detector provided by the utility model, a lengthy and complex wire harness does not need to be connected to the shell wall of the battery pack, so that the corresponding IP protection level can be effectively ensured while the detector is convenient to maintain and replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pack safety, and in particular relates to an external wireless transmission thermal runaway detector and a battery pack. Background Art

[0002] In recent years, the fields of new energy vehicles, electrochemical energy storage, and charging and swapping have continued to develop. As a core component, the battery pack is required to work within a reliable temperature range. The thermal runaway detector in the battery pack is used to monitor the various characteristic data of the battery pack, such as temperature, smoke, gas, and radiation light intensity. The detector converts the detected abnormal characteristic data into an electrical signal and immediately sends an alarm signal to the fire host. At present, battery packs all adopt a sealed structure, and the thermal runaway detector is placed in the battery pack, and then the external wiring harness is connected to the fire host through the reserved connector on the battery pack shell. However, since the thermal runaway detector is a consumable, the battery pack must be opened for operation when a fault occurs or maintenance such as threshold calibration is required. After the maintenance, the IP protection level needs to be re-tested. Not only is the process cumbersome, there is also a potential risk of damaging the IP protection level. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and to provide an external wireless transmission thermal runaway detector and a battery pack which can ensure the corresponding IP protection level and is easy to maintain.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] Based on one aspect of the utility model, there is provided an external wireless transmission thermal runaway detector, comprising a circuit board module, an internal protective cover arranged on the inner side of a battery pack outer shell wall, and an outer wall sealing gasket, an installation adapter plate, an outer cover sealing gasket, and an outer cover stacked in sequence on the outer side of the battery pack outer shell wall, the internal protective cover being fixedly connected to the outer wall sealing gasket and the installation adapter plate in sequence by internal fixing bolts, the outer cover being fixedly connected to the outer cover sealing gasket and the installation adapter plate in sequence by outer cover fixing bolts, the circuit board module being arranged in a cavity formed by the internal protective cover, the installation adapter plate, and the outer cover to detect the inside of the battery pack, the circuit board module comprising a battery, a wireless communication transceiver module, and detection components.

[0006] The external wireless transmission thermal runaway detector of the utility model is installed on the outer shell wall of the battery pack by insertion through a reserved opening on the outer shell wall of the battery pack. Compared with the existing solution of installing it inside the battery pack, it solves the problems of inconvenient inspection and replacement of the detector and difficulty in ensuring the IP protection level. In addition, a power supply and a wireless communication transceiver module are built-in on the circuit board module, which avoids connecting long and complicated wiring harnesses on the outer shell wall of the battery pack, further maximizing the IP protection level of the battery pack while facilitating maintenance and replacement.

[0007] In one embodiment, the installation adapter plate is an annular structure with a through middle portion, one side of the installation adapter plate is recessed relative to the outer wall sealing gasket to form a first connection groove, the outer wall sealing gasket is interference fit in the first connection groove and the thickness of the outer wall sealing gasket is greater than the depth of the first connection groove, and the other side of the installation adapter plate is recessed relative to the outer cover sealing gasket to form a second connection groove, the outer cover sealing gasket is interference fit in the second connection groove and the thickness of the outer cover sealing gasket is greater than the depth of the second connection groove. By interference fit of the outer wall sealing gasket and part of the body of the outer cover sealing gasket with the groove on the installation adapter plate, a better sealing effect can be achieved, further protecting the IP protection level of the battery pack. In addition, when the sealing performance of the installation structure cannot meet the requirements, it is only necessary to replace the sealing gasket to ensure the sealing performance.

[0008] In one embodiment, the detection component includes at least one of a smoke sensor, a temperature sensor, a CO sensor, a VOC sensor, a hydrogen sensor, and a pressure sensor.

[0009] In one embodiment, the circuit board module is detachably connected to the inner side of the outer cover. When the circuit board module is detachably connected to the inner side of the outer cover, when the threshold value calibration or maintenance and replacement of the thermal runaway detector is performed, the circuit board module can be operated by simply removing the outer cover, and the disassembly does not involve the installation of the adapter board, thereby optimizing the inspection and maintenance process of the detector replacement and calibration.

[0010] In one embodiment, the internal protective cover includes a protective cover body and an opening on the protective cover body for smoke to pass through.

[0011] In one embodiment, the openings for smoke to enter are evenly distributed on the protective cover body. The evenly distributed openings make it easier for the detector to detect smoke from different directions in a timely manner.

[0012] In one embodiment, a columnar threaded hole is formed on the inner side wall of the inner protective cover opposite to the inner fixing bolt.

[0013] In one embodiment, four of the internal fixing bolts and four of the external cover fixing bolts are included, so that the overall installation of the thermal runaway detector is more secure.

[0014] In one embodiment, positioning marks for alignment during assembly are provided on the outer contours of the inner protective cover, the mounting adapter plate and the outer cover, so as to facilitate quick installation.

[0015] According to another aspect of the utility model, a battery pack is provided, comprising a battery pack housing and an external wireless transmission thermal runaway detector as described in any one of the above items mounted on the battery pack housing.

[0016] Compared with the prior art, the external wireless transmission thermal runaway detector of the utility model is installed on the wall of the battery pack shell in an inserting manner, which solves the problem that the detector is installed in the battery pack and is inconvenient to inspect and replace, and the IP protection level is difficult to ensure. It optimizes the inspection and maintenance process of detector replacement and calibration, and has a built-in power supply and a wireless communication transceiver module on the circuit board module. Through the wireless transmission signal transceiver method, it can avoid the external lengthy connection harness and maximize the IP protection level of the structure. The battery pack installed with the external wireless transmission thermal runaway detector avoids the connection of lengthy and complex harnesses on the wall of the battery pack shell, which not only ensures the timely maintenance and replacement of core components, but also maximizes the IP protection level of the battery pack.

[0017] Other advantages of the present invention will be described in detail in the following specific implementation section in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0019] In the attached picture:

[0020] Figure 1 This is a structural explosion diagram of an embodiment of an external wireless transmission thermal runaway detector of the utility model;

[0021] Figure 2 for Figure 1 The diagram shows an installation diagram of an external wireless transmission thermal runaway detector installed on a battery pack casing.

[0022] Explanation of the reference numerals: 11 - internal protective cover, 12 - internal fixing bolts, 21 - mounting adapter plate, 22 - outer wall sealing gasket, 23 - circuit board module, 24 - outer cover, 25 - outer cover sealing gasket, 26 outer cover fixing bolts, 3 - battery pack outer shell wall. DETAILED DESCRIPTION

[0023] To further explain the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings, in which the same reference numerals represent the same components.

[0024] Combined with reference Figure 1-2 This embodiment provides a battery pack equipped with an external wireless transmission thermal runaway detector, and the external wireless transmission thermal runaway detector is installed on the battery pack shell wall 3.

[0025] In this embodiment, the external wireless transmission thermal runaway detector includes a circuit board module 23, an internal protective cover 11 arranged on the inner side of the battery pack shell wall 3, and an outer wall sealing gasket 22, a mounting adapter plate 21, an outer cover sealing gasket 25, and an outer cover 24 stacked on the outer side of the battery pack shell wall 3 in sequence. The internal protective cover 11 is fixedly connected to the outer wall sealing gasket 22 and the mounting adapter plate 21 in sequence through four internal fixing bolts 12, and the outer cover 24 is fixedly connected to the outer cover sealing gasket 25 and the mounting adapter plate 21 in sequence through four outer cover fixing bolts 26. The circuit board module 23 is arranged in a cavity formed by the internal protective cover 11, the mounting adapter plate 21, and the outer cover 24 to detect the inside of the battery pack. The circuit board module 23 includes a battery, a wireless communication transceiver module, and detection components. The detection components include smoke sensors, temperature sensors, CO sensors, VOC sensors, hydrogen sensors, and pressure sensors.

[0026] Specifically, the internal protective cover 11 is used to protect the circuit board module 23, including a protective cover body and openings uniformly provided on the protective cover body for smoke to enter, and a columnar threaded hole is formed on the inner side wall of the internal protective cover 11 relative to the internal fixing bolt 12. The circuit board module 23 is detachably connected to the inner side of the outer cover 24. The mounting adapter plate 21 is used to fix the internal protective cover 11 and the outer cover 24 to the battery pack shell wall 3. The mounting adapter plate 21 is a ring-shaped structure with a through middle. One side of the mounting adapter plate 21 is recessed relative to the outer wall sealing gasket 22 to form a first connecting groove. The outer wall sealing gasket 22 is arranged in the first connecting groove with an interference fit and the thickness of the outer wall sealing gasket 22 is greater than the depth of the first connecting groove. The other side of the mounting adapter plate 21 is recessed relative to the outer cover sealing gasket 25 to form a second connecting groove. The outer cover sealing gasket 25 is arranged in the second connecting groove with an interference fit and the thickness of the outer cover sealing gasket 25 is greater than the depth of the second connecting groove, so as to ensure the formation of a closed battery pack and ensure the IP protection level.

[0027] In other embodiments, positioning marks for alignment during assembly may be provided on the outer contours of the internal protective cover 11, the mounting adapter plate 21 and the outer cover 24 to facilitate faster alignment of the internal protective cover 11, the mounting adapter plate 21 and the outer cover 24 for quick installation.

[0028] The external wireless transmission thermal runaway detector of this embodiment is installed in the battery pack shell wall in an inserting manner, which solves the problem that the detector is installed in the battery pack and is inconvenient to repair and replace, and the IP protection level is difficult to ensure. It optimizes the inspection and maintenance process of detector replacement and calibration, and has a built-in power supply and a wireless communication transceiver module on the circuit board module. Through the wireless transmission signal transceiver method, it can avoid the external lengthy connection harness and maximize the IP protection level of the structure. The battery pack equipped with this external wireless transmission thermal runaway detector can not only ensure the timely maintenance and replacement of core components, but also maximize the IP protection level of the battery pack.

[0029] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0030] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. An external wireless transmission thermal runaway detector, characterized in that: The invention comprises a circuit board module (23), an internal protective cover (11) arranged on the inner side of a battery pack shell wall (3), and an outer wall sealing gasket (22), a mounting adapter plate (21), an outer cover sealing gasket (25), and an outer cover (24) which are sequentially stacked on the outer side of the battery pack shell wall (3). The internal protective cover (11) is sequentially fixedly connected to the outer wall sealing gasket (22) and the mounting adapter plate (21) by internal fixing bolts (12). The outer cover (24) is sequentially fixedly connected to the outer cover sealing gasket (25) and the mounting adapter plate (21) by outer cover fixing bolts (26). The circuit board module (23) is arranged in a cavity formed by the internal protective cover (11), the mounting adapter plate (21), and the outer cover (24) to detect the inside of the battery pack. The circuit board module (23) comprises a battery, a wireless communication transceiver module, and detection components.

2. The external wireless transmission thermal runaway detector according to claim 1, characterized in that: The installation adapter plate (21) is an annular structure with a through middle portion, one side of the installation adapter plate (21) is recessed relative to the outer wall sealing gasket (22) to form a first connection groove, the outer wall sealing gasket (22) is arranged in the first connection groove with an interference fit, and the thickness of the outer wall sealing gasket (22) is greater than the depth of the first connection groove, and the other side of the installation adapter plate (21) is recessed relative to the outer cover sealing gasket (25) to form a second connection groove, the outer cover sealing gasket (25) is arranged in the second connection groove with an interference fit, and the thickness of the outer cover sealing gasket (25) is greater than the depth of the second connection groove.

3. The external wireless transmission thermal runaway detector according to claim 1, characterized in that: The detection components include at least one of a smoke sensor, a temperature sensor, a CO sensor, a VOC sensor, a hydrogen sensor, and a pressure sensor.

4. The external wireless transmission thermal runaway detector according to any one of claims 1 to 3, characterized in that: The circuit board module (23) is detachably connected to the inner side of the outer cover (24).

5. The external wireless transmission thermal runaway detector according to any one of claims 1 to 3, characterized in that: The internal protective cover (11) comprises a protective cover body and an opening formed on the protective cover body for smoke to enter.

6. The external wireless transmission thermal runaway detector according to claim 5, characterized in that: The openings for smoke to enter are evenly distributed on the protective cover body.

7. The external wireless transmission thermal runaway detector according to any one of claims 1 to 3, characterized in that: A columnar threaded hole is formed on the inner side wall of the internal protective cover (11) opposite to the internal fixing bolt (12).

8. The external wireless transmission thermal runaway detector according to any one of claims 1 to 3, characterized in that: It comprises four internal fixing bolts (12) and four external cover fixing bolts (26).

9. The external wireless transmission thermal runaway detector according to any one of claims 1 to 3, characterized in that: Positioning marks for alignment during assembly are provided on the outer contours of the inner protective cover (11), the mounting adapter plate (21) and the outer cover (24).

10. A battery pack, characterized in that: It comprises a battery pack shell and an external wireless transmission thermal runaway detector as described in any one of claims 1 to 8 mounted on the battery pack shell.

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