Temperature detection structure assembly of flexible circuit board

Abstract

The utility model provides a temperature detection structure assembly of a flexible circuit board, which relates to the technical field of electronic engineering and temperature control, and comprises a heat insulation bin and a battery management system, a detection assembly is arranged in the heat insulation bin, the detection assembly comprises a flexible circuit board body, the flexible circuit board body is fixedly connected with a metal heat-conducting fin, and the metal heat-conducting fin is connected with the battery management system. The outer surface of the outer wall of the heat insulation bin is coated with a wax layer, when the temperature of the battery is too high and the battery is on fire, the molten wax layer can release carbon dioxide micro-capsules to play a role in flame retardance, the safety of the whole battery management system is improved, and the service life of the battery management system is prolonged. The problem that when the battery is on fire due to too high temperature, the sensor is damaged, so that accurate data of the battery on fire due to too high temperature cannot be obtained when the vehicle is maintained, and the evaluation of the battery on fire reason is influenced is solved.

Description

Technical Field

[0001] The utility model relates to the technical fields of electronic engineering and temperature control, and particularly relates to a temperature detection structure assembly for a flexible printed circuit board. Background Art

[0002] A flexible printed circuit board body is a flexible printed circuit board, which is widely used in electronic products such as smart phones, tablet computers, wearable devices, etc. Due to its flexibility, it is easily affected by mechanical stresses such as bending and folding during use, which may cause problems such as circuit damage and poor contact. Therefore, real-time monitoring of the temperature of the FPCB is an important measure to ensure its normal operation.

[0003] The existing Chinese patent (publication number CN220021303U) discloses an early warning device for thermal runaway of power batteries of new energy vehicles. The temperature sensor of the temperature detection structure detects the temperature signals of each single battery cell of the power battery, and transmits the detected temperature signals to the battery management system through the flexible printed circuit board body to realize the temperature monitoring of each single battery cell of the power battery. Specifically, when thermal runaway occurs in a certain single battery cell, the internal heat of the single battery cell can be conducted to a metal sheet connected to it, and the metal sheet will conduct the heat to a temperature sensor thermally connected to it. The temperature sensor detects the rising temperature and can convert the temperature signal into an electrical signal and quickly feedback it to the battery management system through the circuit in the flexible printed circuit board body. When the battery management system detects that the temperature of the single battery cell is about to exceed the preset temperature, it will feedback to the whole vehicle in real time to warn the driver and passengers to quickly move to a safe place.

[0004] In the above patent, since the flexible printed circuit board body is arranged on the battery and the battery heats up quickly, even if the operating system reacts quickly after sensing an abnormality and makes a treatment, it still cannot fully ensure that the battery will not catch fire. After the fire, the metal heat conducting part and the metal sheet in the above patent are in close contact with the temperature sensor, and the high temperature will directly damage the sensor, making it impossible to obtain accurate data when the battery catches fire due to excessive temperature during subsequent vehicle maintenance, affecting the evaluation of the cause of the battery fire, causing inconvenience, and the temperature sensor in the above patent is connected to the circuit board in a single modular form. When the battery temperature is too high and catches fire, some of the temperature sensors may be damaged, and the measurement error may increase due to position deviation or local environmental changes. Content of the Utility Model

[0005] The purpose of the utility model is to solve the defects existing in the prior art and provide a temperature detection structure assembly for a flexible printed circuit board.

[0006] To achieve the above object, the utility model adopts the following technical scheme: A temperature detection structure assembly for a flexible printed circuit board, comprising a heat insulation chamber and a battery management system, wherein a detection component is arranged in the heat insulation chamber;

[0007] The detection component includes a flexible printed circuit board body, a metal heat conducting sheet is fixedly connected to the flexible printed circuit board body, a temperature sensor is connected to the metal heat conducting sheet, there are multiple metal heat conducting sheets and temperature sensors, and a series plate is connected to each of the multiple temperature sensors and metal heat conducting sheets. The battery management system is fixedly connected to the flexible printed circuit board body. A layer of wax layer is coated on the outer surface of the outer wall of the heat insulation chamber, and the wax layer contains uniformly distributed carbon dioxide microcapsules, wherein carbon dioxide is physically encapsulated in the wax layer, and the diameter of each microcapsule does not exceed 10 micrometers.

[0008] As a preferred embodiment, an inner groove is formed in the cover plate, and a series pipe is fixedly connected to the temperature sensor.

[0009] The technical effect of adopting the above further scheme is: By arranging the series pipe, the series connection of multiple temperature sensors can be realized, which is convenient for the connection of the temperature sensors with external devices, enhances the compatibility and integrated design of the system, makes the sensor sensing values more accurate, reduces the measurement errors caused by the position deviation or local environment change of a single sensor, and since multiple sensors act together, any abnormal readings of a single sensor will be balanced by other normally working sensors, thereby improving the overall measurement accuracy.

[0010] As a preferred embodiment, an inner groove is formed in the series plate, and the series pipe is clamped in the inner groove on the series plate.

[0011] The technical effect of adopting the above further scheme is: By arranging the series pipe to be clamped in the inner groove of the series plate, further protection of the series pipe can be realized. The series plate can realize the series connection of the temperature sensors. When the battery temperature is too high, even if the series plate is damaged, the series pipe can still realize the series connection of the sensors.

[0012] As a preferred embodiment, a first metal connecting plate is fixedly connected to the bottom of the flexible printed circuit board body.

[0013] The technical effect of adopting the above further scheme is: By arranging the first metal plate, it is convenient to connect the damping spring, enhances the overall strength of the structure, and improves the heat conduction efficiency.

[0014] As a preferred embodiment, a small damping spring is fixedly connected to the side of the first metal connecting plate away from the flexible printed circuit board body, and a second metal connecting plate is fixedly connected to the end of the small damping spring away from the first metal connecting plate.

[0015] The technical effect of adopting the above further solution is: the damping spring is used to reduce the influence of vibration on the temperature detection accuracy, and the stability of the system in a vibrating environment is improved.

[0016] As a preferred embodiment, the heat insulation chamber is arranged in a ceramic structure.

[0017] The technical effect of adopting the above further solution is: the ceramic structure has the characteristic of high temperature resistance and can well prevent high temperature from invading the detection component.

[0018] Compared with the prior art, the advantages and positive effects of the present utility model are as follows

[0019] 1. In the present utility model, when the battery temperature is too high and catches fire, the melted wax layer will release carbon dioxide microcapsules, playing a flame retardant role, improving the safety of the entire battery management system, and avoiding the problem that when the battery temperature is too high and catches fire, the high temperature will directly damage the sensor, making it impossible to obtain data on abnormal battery conditions during vehicle maintenance, affecting the evaluation of the cause of battery fire.

[0020] 2. In the present utility model, by providing a detection component, the detection component includes a series board and a series tube, realizing the series connection of multiple temperature sensors. The multiple temperature sensors act together, which can reduce the measurement error caused by position deviation or local environmental changes, ensuring the accuracy and reliability of the overall measurement result, and avoiding the problem that when the battery temperature is too high, a single temperature sensor is damaged, resulting in a deviation in the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the detection component of a temperature detection structure assembly for a flexible circuit board provided by the present utility model;

[0022] Figure 2 Schematic diagram of the position of the series tube of a temperature detection structure assembly for a flexible circuit board provided by the present utility model;

[0023] Figure 3 A temperature detection structure assembly for a flexible circuit board provided by the present utility model Figure 2 Enlarged view of the structure at A in

[0024] Figure 4 Schematic diagram of the position of the heat insulation chamber of a temperature detection structure assembly for a flexible circuit board provided by the present utility model.

[0025] Legend:

[0026] 1. Heat insulation chamber; 2. Detection component; 21. Flexible circuit board body; 22. Metal heat conduction sheet; 23. Temperature sensor; 24. Series connection board; 25. Series connection tube; 3. Battery management system; 4. Small damping spring; 41. First metal connection plate; 42. Second metal connection plate. Detailed implementation manner

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] As Figures 1 to 4 shown, this embodiment provides a technical solution, a temperature detection structure assembly for a flexible circuit board, including a heat insulation chamber 1 and a battery management system 3, and a detection component 2 is arranged in the heat insulation chamber 1;

[0029] The detection component 2 includes a flexible circuit board body 21, a metal heat conduction sheet 22 is fixedly connected to the flexible circuit board body 21, a temperature sensor 23 is connected to the metal heat conduction sheet 22, there are multiple metal heat conduction sheets 22 and temperature sensors 23, a series connection board 24 is connected to multiple temperature sensors 23 and metal heat conduction sheets 22, the battery management system 3 is fixedly connected to the flexible circuit board body 21, and a layer of wax layer is coated on the outer surface of the outer wall of the heat insulation chamber 1. The wax layer contains uniformly distributed carbon dioxide microcapsules, wherein carbon dioxide is physically encapsulated in the wax layer, and the diameter of each microcapsule does not exceed ten micrometers;

[0030] By providing the detection component 2, the detection component 2 includes a series connection board 24 and a series connection tube 25, the series connection of multiple temperature sensors 23 is realized. The multiple temperature sensors 23 act together, which can reduce the measurement error caused by position deviation or local environmental changes, ensuring the accuracy and reliability of the overall measurement result. When the battery overheats and catches fire, the series connection between the sensors can also be maintained, ensuring the stable operation of the system. It can protect the heat insulation chamber 1 from too high or too low temperatures, and at the same time provide an additional protective layer in case of abnormal battery conditions, enhancing the durability and reliability of the entire structure. When the battery catches fire due to too high temperature, the high temperature will directly damage the sensors, making it impossible to obtain accurate data when the battery catches fire due to too high temperature during vehicle maintenance, affecting the evaluation of the cause of the battery fire.

[0031] Furthermore, an inner groove is provided in the cover plate. A series pipe 25 is fixedly connected to the temperature sensor 23. By providing the series pipe 25, the series connection of multiple temperature sensors 23 can be realized, which is convenient for the connection of the temperature sensors 23 with external devices, enhances the compatibility and integrated design of the system, makes the sensor sensing values more accurate, reduces the measurement errors caused by the position deviation or local environmental changes of a single sensor. Since multiple sensors act together, any abnormal readings of a single sensor will be balanced by other normally working sensors, thereby improving the overall measurement accuracy;

[0032] A first metal connecting plate 41 is fixedly connected to the bottom of the flexible circuit board body 21. By providing the first metal plate, it is convenient to connect the damping spring, enhances the overall strength of the structure, and improves the heat conduction efficiency.

[0033] In the above solution, there is also a problem that the sensor may not be able to be connected in series after the series plate 24 is damaged by high temperature, such as Figure 2 As shown, an inner groove is provided in the series plate 24. The series pipe 25 is clamped in the inner groove on the series plate 24. By setting the series pipe 25 to be clamped in the inner groove of the series plate 24, further protection of the series pipe 25 is realized. The series plate 24 can also realize the series connection of the temperature sensors 23. When the battery temperature is too high, even if the series plate 24 is damaged, the series pipe 25 can still realize the series connection of the sensors.

[0034] In the above solution, there is also a problem that the vibration generated during the driving of the vehicle may affect the stability of the circuit board, such as Figure 1 and Figure 2 As shown, a small damping spring 4 is fixedly connected to the side of the first metal connecting plate 41 away from the flexible circuit board body 21. One end of the small damping spring 4 away from the first metal connecting plate 41 is fixedly connected to a second metal connecting plate 42. The damping spring is used to reduce the influence of vibration on the temperature detection accuracy and improve the stability of the structure in a vibrating environment.

[0035] In the above patent, there is also a problem that high temperature may burn through the heat insulation chamber 1 and then damage the detection component 2, such as Figures 1 to 4 As shown, the heat insulation chamber 1 is provided with a ceramic structure, and the detection component 2 is arranged in the heat insulation chamber 1. The ceramic structure has the characteristic of high temperature resistance and can well prevent high temperature from invading the detection component 2.

[0036] Working principle:

[0037] Such as Figures 1-4As shown: when the battery catches fire due to excessive temperature, the melted wax layer will release carbon dioxide microcapsules, which play a flame retardant role, improving the safety of the entire battery system. When the battery catches fire due to excessive temperature, the high temperature will directly damage the sensor, making it impossible to obtain accurate data when the battery catches fire due to excessive temperature during vehicle maintenance, and affecting the evaluation of the cause of battery fire;

[0038] By providing a detection component 2, the detection component 2 includes a series board 24 and a series tube 25, which realizes the series connection of multiple temperature sensors 23. The multiple temperature sensors 23 work together, which can reduce the measurement error caused by position deviation or local environmental changes, ensuring the accuracy and reliability of the overall measurement result, and avoiding the deviation of the measurement result caused by the damage of a single temperature sensor 23 when the battery temperature is too high;

[0039] The series tube 25 is clamped on the inner groove of the series board 24, protecting the series tube 25. When the battery overheats and catches fire, the series connection between the sensors can still be maintained, ensuring the stable operation of the system. It can protect the heat insulation chamber 1 from too high or too low temperatures, and at the same time provide an additional protective layer in case of battery abnormalities, enhancing the durability and reliability of the entire structure;

[0040] By providing a wax layer on the surface of the heat insulation chamber 1, not only the environmental pollution risk is reduced, but also when the battery temperature is too high, the melted wax layer will release carbon dioxide microcapsules, which play a flame retardant role, improving the safety of the entire battery system.

[0041] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A temperature detection structure assembly of a flexible circuit board, comprising a heat insulation compartment (1) and a battery management system (3), characterized in that: A detection component (2) is arranged in the heat-insulating chamber (1); The detection component (2) comprises a flexible circuit board body (21), a metal heat conductive sheet (22) is fixedly connected to the flexible circuit board body (21), a temperature sensor (23) is fixedly connected to the metal heat conductive sheet (22), and a series connection plate (24) is connected to both the temperature sensor (23) and the metal heat conductive sheet (22), the battery management system (3) is fixedly connected to the flexible circuit board body (21), and the outer surface of the outer wall of the heat insulating chamber (1) is coated with a wax layer.

2. The temperature detection structure assembly of a flexible circuit board according to claim 1, characterized in that: The temperature sensor (23) is fixedly connected to a series tube (25).

3. The temperature detection structure assembly of a flexible circuit board according to claim 2, characterized in that: An inner groove is formed in the series connection plate (24), and the series connection pipe (25) is clamped on the inner groove of the series connection plate (24).

4. The temperature detection structure assembly of a flexible circuit board according to claim 3, characterized in that: A first metal connecting plate (41) is fixedly connected to the bottom of the flexible circuit board body (21).

5. The temperature detection structure assembly of a flexible circuit board according to claim 4, characterized in that: A small damping spring (4) is fixedly connected to a side of the first metal connecting plate (41) away from the flexible circuit board body (21), and a second metal connecting plate (42) is fixedly connected to an end of the small damping spring (4) away from the first metal connecting plate (41).

6. The temperature detection structure assembly of a flexible circuit board according to claim 1, characterized in that: The heat-insulating chamber (1) is configured as a ceramic structure.

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