Top cover assembly with intelligent sensor and secondary battery

Abstract

The utility model discloses a top cover assembly with an intelligent sensor and a secondary battery, the top cover assembly comprises a top cover sheet, the top cover sheet is provided with a first mounting hole, and one side, facing the interior of the battery, of the first mounting hole is provided with a mounting step surface; the intelligent sensor comprises a circuit board and double sensors mounted on the circuit board, the double sensors are used for detecting the temperature and pressure in the battery, the circuit board is fixedly connected to the mounting step surface, and the double sensors are located on the inner side of the circuit board. According to the top cover assembly with the intelligent sensor and the secondary battery provided by the embodiment of the invention, the mounting step surface is arranged on the inner side of the first mounting hole of the top cover piece, so that the intelligent sensor can be fixed on the inner side of the top cover piece, hidden mounting is realized, the internal state of the battery can be effectively monitored, and the safety of the battery is improved. The adverse effect on the overall appearance attractiveness of the battery can be avoided, the packaging complexity is reduced, and the influence on the battery performance is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of secondary batteries, and particularly relates to a top cover assembly with an intelligent sensor and a secondary battery. Background Art

[0002] Chinese Patent Invention Publication No. CN114050360A discloses a secondary battery top cover with dual sensors and its assembly method. By welding the dual sensors to the outside of the battery top cover, effective monitoring of the internal state of the battery is achieved. However, this design approach has several limitations. Specifically, the selection of the welding position of the dual sensors is on the outside of the cover plate, directly resulting in the welding marks and possible auxiliary structures being exposed outside the battery. This not only may have an adverse impact on the overall aesthetic appearance of the battery, but also may accelerate the aging or corrosion of the welding part due to the action of external environmental factors (such as humidity, corrosive gases, etc.), potentially affecting the measurement accuracy and long-term stability of the dual sensors. In addition, external welding may also increase the complexity of battery encapsulation, pose higher requirements for quality control during the production process, and may also bring inconvenience to the use and maintenance of the battery. Summary of the Utility Model

[0003] In view of this, this application provides a top cover assembly with an intelligent sensor and a secondary battery. By setting the welding position inside the top cover, a hidden installation is achieved to solve at least one of the above technical problems.

[0004] To achieve the above application objectives, the technical solutions adopted in this application are as follows:

[0005] An embodiment of this application provides a top cover assembly with an intelligent sensor, including:

[0006] A top cover sheet, on which a first installation hole is provided, and an installation step surface is provided on the side of the first installation hole facing the inside of the battery;

[0007] An intelligent sensor, which includes a circuit board and a dual sensor installed on the circuit board. The dual sensor is used to detect the temperature and pressure inside the battery. The circuit board is fixedly connected to the installation step surface, and the dual sensor is located inside the circuit board.

[0008] In some embodiments, the top cover assembly with an intelligent sensor further includes:

[0009] An insulating member, which is arranged inside the top cover sheet. The insulating member is provided with a second installation hole corresponding to the position of the first installation hole, and the aperture of the second installation hole is larger than that of the first installation hole.

[0010] In some embodiments, the intelligent sensor further includes:

[0011] Encapsulation structure, inside which there is a cavity for installing a dual sensor. One end of the cavity is a circuit board, the other end is a diaphragm, and the cavity is filled with a pressure transmission medium.

[0012] In some embodiments, the intelligent sensor further includes:

[0013] A digital signal processing chip, which is connected to the dual sensor and is located inside the cavity;

[0014] A connecting piece, one end of which is connected to the digital signal processing chip and the other end passes through the circuit board.

[0015] In some embodiments, the other end of the connecting piece is connected to a connector or a wireless communication module.

[0016] In some embodiments, the circuit board and the mounting step surface are sealed by laser welding, gluing, ultrasonic welding, or electric current welding.

[0017] The embodiment of the present application also provides a secondary battery, including a battery case and a top cover assembly with an intelligent sensor provided in any of the above embodiments.

[0018] Compared with the prior art, the beneficial effects of the embodiment of the present application are:

[0019] A top cover assembly with an intelligent sensor and a secondary battery provided by the embodiment of the present application, by arranging a mounting step surface inside the first mounting hole of the top cover sheet, enables the intelligent sensor to be fixedly connected to the inside of the top cover sheet, thereby realizing a hidden installation, which can not only effectively monitor the internal state of the battery, but also avoid having an adverse impact on the overall appearance beauty of the battery, reduce the packaging complexity, and reduce the impact on the battery performance. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Shows a schematic structural diagram of a top cover assembly with an intelligent sensor provided by the embodiment of the present application;

[0022] Figure 2 Shows a top view schematic diagram of the intelligent sensor provided by the embodiment of the present application;

[0023] Figure 3 Shows a bottom view schematic diagram of the intelligent sensor provided by the embodiment of the present application;

[0024] Figure 4 shows a cross-sectional view of a top cover assembly with a smart sensor provided by an embodiment of the present application;

[0025] Figure 5 shows Figure 4 an enlarged schematic view of the welding position of the smart sensor in

[0026] Figure 6 shows Figure 4 an enlarged schematic view of the rendered welding position of the smart sensor in

[0027] Illustration:

[0028] 11. Top cover sheet; 111. First mounting hole; 112. Mounting step surface; 12. Insulating part; 121. Second mounting hole; 13. Smart sensor; 131. Circuit board; 132. Encapsulation structure; 133. Dual sensor; 134. Connecting part. Detailed implementation manners

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0032] The embodiment of the present application provides a top cover assembly with a smart sensor and a secondary battery, which can not only ensure accurate monitoring of the internal state of the battery, but also avoid negative impacts on the appearance and performance of the battery.

[0033] In order to illustrate the technical solutions described in the present application, the following will be described through specific embodiments.

[0034] Please refer to Figures 1 to 6As shown in the figure, this embodiment provides a top cover assembly with an intelligent sensor, including: a top cover sheet 11 and an intelligent sensor 13, and the intelligent sensor 13 is welded to the inner side of the top cover sheet 11.

[0035] Specifically, a first mounting hole 111 is formed on the top cover sheet 11, and a mounting step surface 112 is provided on one side of the first mounting hole 111 facing the inside of the battery. The intelligent sensor 13 includes a circuit board 131 and a dual sensor 133 mounted on the circuit board 131. The dual sensor 133 is used to detect the temperature and pressure inside the battery. The circuit board 131 is fixedly connected to the mounting step surface 112, and the dual sensor 133 is located inside the circuit board 131. As an example, the circuit board 131 and the mounting step surface 112 are sealed by laser welding, gluing, ultrasonic welding, or electric current welding.

[0036] In some embodiments, a packaging structure 132 is provided around the dual sensor 133. Specifically, the intelligent sensor 13 further includes: a packaging structure 132. The packaging structure 132 has a cavity for mounting the dual sensor 133 inside. One end of the cavity is the circuit board 131, and the other end of the cavity is a diaphragm. The cavity is filled with a pressure transmission medium. For example, the pressure transmission medium is silicone oil.

[0037] In some embodiments, the intelligent sensor further includes: a digital signal processing chip, which is connected to the dual sensor 133 and is located inside the cavity; a connector 134, one end of the connector 134 is connected to the digital signal processing chip, and the other end passes through the circuit board 131.

[0038] In some embodiments, a connector or a wireless communication module is connected to the other end of the connector 134. For example, the connector is a USB connector; for example, the wireless communication module is a Bluetooth module. Optionally, the connector 134 includes an antenna.

[0039] For example, the digital signal processing chip is used to convert the analog signal detected by the dual sensor 133 into a digital signal, and the wireless communication module or the connector is used to transmit the digital signal externally, so as to realize the external transmission of the temperature and pressure data inside the battery.

[0040] In some embodiments, the top cover assembly with an intelligent sensor further includes: an insulating member 12, which is arranged on the inner side of the top cover sheet 11. The insulating member 12 is provided with a second mounting hole 121 corresponding to the position of the first mounting hole 111, and the aperture of the second mounting hole 121 is larger than that of the first mounting hole 111. Optionally, the center lines of the first mounting hole 111 and the second mounting hole 121 coincide.

[0041] The embodiment of the present application further provides a secondary battery, which includes a battery housing and the top cover assembly with a smart sensor provided in any of the above embodiments. As an example, the secondary battery is a lithium-ion battery.

[0042] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A top cover assembly with an intelligent sensor, characterized in that, Comprising: A top cover sheet, on which a first mounting hole is provided, and a mounting step surface is provided on one side of the first mounting hole facing the inside of the battery; An intelligent sensor, the intelligent sensor includes a circuit board and a dual sensor mounted on the circuit board, the dual sensor is used to detect the temperature and pressure inside the battery, the circuit board is fixedly connected to the mounting step surface, and the dual sensor is located inside the circuit board.

2. The top cover assembly with an intelligent sensor according to claim 1, characterized in that, Further comprising: An insulating member, the insulating member is arranged inside the top cover sheet, and a second mounting hole corresponding to the position of the first mounting hole is provided on the insulating member, and the aperture of the second mounting hole is larger than that of the first mounting hole.

3. The top cover assembly with an intelligent sensor according to claim 1, characterized in that The intelligent sensor further includes: A packaging structure, inside which there is a cavity for mounting the dual sensor, one end of the cavity is the circuit board, the other end of the cavity is a diaphragm, and the cavity is filled with a pressure transmission medium.

4. The top cover assembly with an intelligent sensor according to claim 3, wherein, The intelligent sensor further includes: A digital signal processing chip, the digital signal processing chip is connected to the dual sensor and is located inside the cavity; A connecting member, one end of the connecting member is connected to the digital signal processing chip, and the other end passes through the circuit board.

5. The top cover assembly with an intelligent sensor according to claim 4, characterized in that, The other end of the connecting member is connected with a connector or a wireless communication module.

6. The top cover assembly with an intelligent sensor according to claim 1, characterized in that, The circuit board and the mounting step surface are sealed by laser welding, gluing, ultrasonic welding, or electric current welding.

7. A secondary battery, characterized in that, Comprising a battery case and a top cover assembly with an intelligent sensor according to any one of claims 1 to 6.

Images