Pole structure with intelligent chip, top cover assembly and secondary battery

Abstract

The utility model discloses a pole structure with an intelligent chip, a top cover assembly and a secondary battery, the pole structure with the intelligent chip comprises: a pole body, the middle of the pole body is provided with a mounting hole for communicating the inside and the outside of the battery; the intelligent chip is mounted in the mounting hole in a sealing manner, and the intelligent chip is used for detecting the temperature and the pressure in the battery. According to the pole structure with the intelligent chip provided by the embodiment of the invention, the mounting hole is formed in the middle of the pole body, so that the internal pressure of the battery can be transmitted to the intelligent chip through the mounting hole for monitoring. And moreover, the intelligent chip is sealed at the mounting hole and can respond to the temperature of the pole more quickly, so that the real-time performance and the accuracy of temperature monitoring by the intelligent chip are improved.

Description

Technical Field

[0001] This application belongs to the field of secondary battery technology, and particularly relates to a terminal structure with a smart chip, a top cover assembly, and a secondary battery. Background Technology

[0002] Chinese patent publication CN114050360A discloses an innovative secondary battery top cover structure and its assembly process. This design cleverly integrates dual sensors on the outer surface of the battery top cover, aiming to achieve efficient monitoring of key internal parameters of the battery—including internal pressure and temperature. While this solution demonstrates progress in battery state monitoring technology, it still faces certain limitations. Specifically, because the dual sensors are positioned on the outer area of ​​the top cover, and considering the often high-temperature environment encountered by the battery terminals during operation, this layout results in a less than ideal response speed to battery temperature changes, thus affecting the real-time performance and accuracy of temperature monitoring. Utility Model Content

[0003] In view of this, this application provides an electrode structure with a smart chip, a top cover assembly, and a secondary battery. By placing the smart chip in the middle of the electrode, the real-time performance and accuracy of the smart chip's temperature monitoring are improved.

[0004] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0005] A first aspect of this application provides a pole piece structure with a smart chip, comprising:

[0006] The electrode body has a mounting hole in the middle for connecting the inside and outside of the battery.

[0007] The smart chip is sealed and installed in the mounting hole. The smart chip is used to detect the temperature and pressure inside the battery.

[0008] In some embodiments, the wall of the mounting hole is provided with a mounting stepped surface, and the smart chip and the mounting stepped surface are sealed together.

[0009] In some embodiments, the smart chip and the mounting step surface are sealed by laser welding, adhesive bonding, ultrasonic welding, or electric welding.

[0010] In some embodiments, the mounting step surface is located on the outer side of the pole body, or the mounting step surface is located on the inner side of the pole body.

[0011] In some embodiments, the electrode body is a positive electrode or a negative electrode.

[0012] In some embodiments, the smart chip includes:

[0013] Dual sensors are used to detect the temperature and pressure inside the battery.

[0014] The encapsulation structure has a cavity inside for mounting dual sensors. One end of the cavity is a circuit board, and the other end is a diaphragm. The cavity is filled with a pressure transmission medium.

[0015] A digital signal processing chip, which connects to two sensors and is located inside a cavity;

[0016] The connector has one end connected to a digital signal processing chip and the other end passing through a circuit board and connected to a connector or wireless communication module.

[0017] A second aspect of this application provides a top cover assembly, including the pole structure with a smart chip described above.

[0018] A third aspect of this application provides a secondary battery, including the electrode structure or top cover assembly with a smart chip provided above.

[0019] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0020] This application provides an electrode structure with an integrated smart chip. By creating a mounting hole in the center of the electrode body, the internal pressure of the battery can be transmitted to the smart chip for monitoring. Furthermore, the smart chip is sealed at the mounting hole, enabling a faster response to electrode temperature, thereby improving the real-time performance and accuracy of temperature monitoring. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a pole post structure with a smart chip provided in an embodiment of this application is shown;

[0023] Figure 2 An exploded view of a pole structure with a smart chip provided in an embodiment of this application is shown;

[0024] Figure 3 It shows Figure 2 A magnified view of the location of the mounting holes;

[0025] Figure 4A top view of a pole structure with a smart chip provided in an embodiment of this application is shown;

[0026] Figure 5 It shows Figure 4 The smart chip section in the cross-sectional view of XX;

[0027] Figure 6 A top view schematic diagram of the smart chip provided in an embodiment of this application is shown;

[0028] Figure 7 The diagram shows a bottom view of the smart chip provided in an embodiment of this application.

[0029] Illustration:

[0030] 11. Top cover plate; 12. Pole post body; 121. Mounting hole; 122. Mounting step surface; 13. Smart chip; 131. Circuit board; 132. Packaging structure; 133. Dual sensors; 134. Connector. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] This application provides an electrode post structure with a smart chip, a top cover assembly, and a secondary battery. By opening a mounting hole in the middle of the electrode post for installing the smart chip, the real-time performance and accuracy of the smart chip's temperature monitoring can be improved, while also enabling monitoring of the internal pressure and temperature of the battery.

[0035] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0036] Please see Figures 1 to 7 As shown in the figure, this application embodiment provides a pole structure with a smart chip, which is installed on the top cover plate 11.

[0037] Specifically, the electrode structure includes an electrode body 12 and a smart chip 13. As an example, the electrode body 12 can be a positive electrode or a negative electrode.

[0038] The terminal body 12 has a mounting hole 121 in the middle for connecting the inside and outside of the battery. The smart chip 13 is sealed and installed in the mounting hole 121. The smart chip 13 is used to detect the temperature and pressure inside the battery.

[0039] This application does not impose specific limitations on the structure of the electrode body 12 and the smart chip 13. As an example, since electrons mainly flow along the outer edge of the electrode body 12 when it conducts electricity, the aforementioned mounting hole 121 has a relatively small impact on the conductivity of the electrode body 12. Furthermore, the influence of the mounting hole 121 on conductivity can be offset by increasing the size of the electrode body 12. As an example, since the battery interior is connected to the smart chip 13, the material of the smart chip 13 facing the battery interior should be resistant to electrolyte.

[0040] The aforementioned terminal structure with a smart chip allows the internal pressure of the battery to be transmitted to the smart chip 13 for monitoring through a mounting hole 121 in the middle of the terminal body 12. Furthermore, the smart chip 13 is sealed at the mounting hole 121, enabling it to respond more quickly to the temperature of the terminal, thereby improving the real-time performance and accuracy of temperature monitoring by the smart chip 13.

[0041] In some embodiments, the wall of the mounting hole 121 is provided with a mounting stepped surface 122, and the smart chip 13 and the mounting stepped surface 122 are sealed together. As an example, the smart chip 13 and the mounting stepped surface 122 are sealed by laser welding, adhesive bonding, ultrasonic welding, or electric current welding.

[0042] In some embodiments, the mounting step surface 122 is located on the outer surface of the pole body 12, or the mounting step surface 122 is located on the inner surface of the pole body 12. As an example, Figure 3 An installation step surface 122 located on the outer side of the pole body 12 is shown.

[0043] In some embodiments, the smart chip 13 includes dual sensors 133, a package structure 132, a digital signal processing chip, and a connector 134. The dual sensors 133 are used to detect the temperature and pressure inside the battery. The package structure 132 has a cavity for mounting the dual sensors 133; one end of the cavity is a circuit board 131, and the other end is a diaphragm. The cavity is filled with a pressure transmission medium, such as silicone oil.

[0044] A digital signal processing chip is connected to dual sensors 133 and is located within the cavity. One end of a connector 134 is connected to the digital signal processing chip, and the other end passes through the circuit board 131 and is connected to a connector or a wireless communication module. 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.

[0045] For example, a digital signal processing chip is used to convert the analog signal detected by the dual sensors 133 into a digital signal, and a wireless communication module or connector is used to transmit the digital signal to the outside world, so as to realize the transmission of temperature and pressure data inside the battery.

[0046] This application also provides a top cover assembly, including a pole structure with a smart chip and a top cover sheet 11 provided in any of the above embodiments.

[0047] This application also provides a secondary battery, including a terminal structure with a smart chip as provided in any of the above embodiments, or a top cover assembly as provided in the above embodiments. As an example, the secondary battery is a lithium-ion battery.

[0048] The aforementioned top cover assembly and secondary battery also possess the aforementioned beneficial effects, namely, by opening a mounting hole 121 in the middle of the terminal post for installing the smart chip 13, the real-time performance and accuracy of the smart chip 13 in monitoring temperature can be improved on the basis of monitoring the internal pressure and temperature of the battery.

[0049] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 this application, and should all be included within the protection scope of this application.

Claims

1. A pole piece structure with an intelligent chip, characterized in that, include: The electrode body has a mounting hole in the middle for connecting the inside and outside of the battery; A smart chip is sealed and installed in the mounting hole, and the smart chip is used to detect the temperature and pressure inside the battery.

2. The pole post structure with a smart chip according to claim 1, characterized in that, The mounting hole has a stepped mounting surface on its wall, and the smart chip and the stepped mounting surface are sealed together.

3. The pole post structure with a smart chip according to claim 2, characterized in that, The smart chip and the mounting step surface are sealed by laser welding, adhesive bonding, ultrasonic welding, or electric current welding.

4. The pole piece structure with a smart chip according to claim 2, characterized in that, The mounting step surface is located on the outer side of the pole body, or the mounting step surface is located on the inner side of the pole body.

5. The pole post structure with a smart chip according to claim 1, characterized in that, The electrode body is either a positive electrode or a negative electrode.

6. A pole piece structure with a smart chip according to any one of claims 1 to 5, characterized in that, The smart chip includes: Dual sensors, used to detect the temperature and pressure inside the battery; The encapsulation structure has a cavity inside for mounting the dual sensors. One end of the cavity is a circuit board, and the other end is a diaphragm. The cavity is filled with a pressure transmission medium. A digital signal processing chip, which is connected to the dual sensors and is located within the cavity; A connector, one end of which is connected to the digital signal processing chip, and the other end of which passes through the circuit board and is connected to a connector or wireless communication module.

7. A top cover assembly, characterized in that, Includes a pole structure with a smart chip as described in any one of claims 1 to 6.

8. A secondary battery, characterized in that, It includes a pole post structure with a smart chip as described in any one of claims 1 to 6, or a top cover assembly as described in claim 7.

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