Pole structure with multifunctional integrated hole, top cover assembly and secondary battery

Abstract

The utility model discloses a pole structure with a multifunctional integration hole, a top cover assembly and a secondary battery, the pole structure with the multifunctional integration hole comprises a pole body, the pole body is provided with the multifunctional integration hole used for being detachably connected to a liquid injection device, and one side, far away from the interior of the battery, of the multifunctional integration hole is provided with a mounting step surface; and the intelligent sensor is used for being connected with the mounting step surface in a sealing manner after liquid injection of the battery, and the intelligent sensor is configured to detect the temperature and the pressure in the battery. According to the pole structure with the multifunctional integrated hole, the top cover assembly and the secondary battery provided by the embodiment of the invention, the multifunctional integrated hole is formed in the pole body and is used for injecting liquid and mounting an intelligent sensor, so that the number of holes can be reduced, the processing cost is reduced, integrated design is realized, and the production efficiency is improved. The intelligent sensor and the secondary battery are miniaturized.

Description

Technical Field

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

[0002] Existing lithium-ion batteries are typically equipped with smart sensors to monitor internal temperature and pressure, which requires mounting holes in the battery. Additionally, the battery also needs to have filling holes, explosion-proof valve mounting holes, and terminal mounting holes. Therefore, existing lithium-ion batteries with smart sensors suffer from problems such as a large number of holes, complex structure, and high manufacturing costs. Utility Model Content

[0003] In view of this, this application provides a pole post structure, a top cover assembly, and a secondary battery with a multifunctional integrated hole, which is used for both liquid injection and installation of a smart sensor, in order to solve the above-mentioned technical problems.

[0004] Therefore, the technical solution adopted in this application is as follows:

[0005] This application provides a pole post structure with a multifunctional integrated hole, including:

[0006] The electrode body has a multi-functional integrated hole for detachable connection to the liquid injection device, and the side of the multi-functional integrated hole away from the inside of the battery has an installation step surface.

[0007] The smart sensor is used to seal the mounting step surface after the battery is filled with electrolyte. The smart sensor is configured to detect the temperature and pressure inside the battery.

[0008] In some embodiments, the smart sensor includes:

[0009] 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. The dual sensors are used to detect the temperature and pressure inside the battery.

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

[0011] A digital signal processing chip, which connects to two sensors and is located inside a cavity;

[0012] 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.

[0013] In some embodiments, the smart sensor is sealed to the mounting step surface by laser welding, adhesive bonding, ultrasonic welding, or electric welding.

[0014] This application also provides a top cover assembly, including a top cover sheet and the aforementioned pole post structure with a multifunctional integrated hole, wherein the pole post structure is mounted on the top cover sheet.

[0015] This application also provides a secondary battery, including a battery casing and the aforementioned top cover assembly.

[0016] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0017] This application provides an electrode post structure with a multi-functional integrated hole, a top cover assembly, and a secondary battery. By setting a multi-functional integrated hole on the electrode post body, the multi-functional integrated hole can be used for both liquid injection (as an injection hole) and mounting of a smart sensor (as a mounting hole). This reduces the number of holes, lowers processing costs, and achieves an integrated design, enabling miniaturization of the smart sensor and the secondary battery. Attached Figure Description

[0018] 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.

[0019] Figure 1 This paper shows a schematic diagram of the structure of a top cover assembly provided in an embodiment of this application;

[0020] Figure 2 An exploded view of a top cover assembly provided in an embodiment of this application is shown;

[0021] Figure 3 A schematic diagram of the structure of the pole body provided in an embodiment of this application is shown;

[0022] Figure 4 A top view schematic diagram of the intelligent sensor provided in an embodiment of this application is shown;

[0023] Figure 5 This is a bottom view of the smart sensor with the diaphragm hidden, as shown in an embodiment of this application.

[0024] Figure 6 A bottom-view schematic diagram of the smart sensor provided in an embodiment of this application is shown.

[0025] Illustration:

[0026] 11. Top cover plate; 12. Pole post body; 121. Multifunctional integrated hole; 122. Mounting step surface; 13. Smart sensor; 131. Circuit board; 132. Packaging structure; 133. Dual sensor; 134. Connector; 135. Diaphragm. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0031] Please see Figures 1 to 6 As shown, this embodiment provides an electrode post structure with a multifunctional integrated hole, including: an electrode post body 12 and a smart sensor 13. The electrode post body 12 has a multifunctional integrated hole 121 for detachable connection to a liquid filling device. A mounting step surface 122 for mounting the smart sensor 13 is provided on the side of the multifunctional integrated hole 121 away from the battery interior. Specifically, the smart sensor 13 is used to seal the mounting step surface 122 after the battery is filled with liquid, and the smart sensor 13 is configured to detect the temperature and pressure inside the battery.

[0032] It should be noted that the shape of the mounting step surface 122 is not specifically limited in the embodiments of this application. Figure 1 and Figure 2 The example shown is for illustrative purposes only.

[0033] It should be noted that the structure of the liquid injection device is not specifically limited in the embodiments of this application, as long as it can be detachably connected to the multi-functional integrated hole 121 and realize liquid injection.

[0034] The above-mentioned pole post structure with multi-functional integrated hole is used as follows: the liquid injection device injects liquid into the battery through the multi-functional integrated hole 121. After the liquid injection is completed, the liquid injection device is removed, and then the smart sensor 13 is sealed and connected to the mounting step surface 122.

[0035] The electrode post structure with multifunctional integrated holes provided in this application embodiment, by setting multifunctional integrated holes 121 on the electrode post body 12, the multifunctional integrated holes 121 are used for both liquid injection (as liquid injection holes) and mounting of smart sensors 13 (as mounting holes), thus reducing the number of holes, reducing processing costs, realizing integrated design, and enabling miniaturization of smart sensors 13 and secondary batteries.

[0036] In some embodiments, the smart sensor 13 includes: a package structure 132, the package structure 132 having a cavity for mounting dual sensors 133, one end of the cavity being a circuit board 131 and the other end being a diaphragm 135, the cavity being filled with a pressure transmission medium (e.g., silicone oil), and the dual sensors 133 being used to detect the temperature and pressure inside the battery.

[0037] In some embodiments, the smart sensor 13 further includes: a digital signal processing chip connected to the dual sensors 133 and located within the cavity; and a connector 134, one end of which is connected to the digital signal processing chip, and the other end which passes through the circuit board 131 and is connected to a connector or a wireless communication module.

[0038] In some embodiments, the connector is a USB connector.

[0039] In some embodiments, the wireless communication module is a Bluetooth module. Optionally, the connector 134 includes an antenna.

[0040] 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.

[0041] In some embodiments, the smart sensor 13 is sealed to the mounting step surface 122 by laser welding, adhesive bonding, ultrasonic welding, or electric welding.

[0042] This application also provides a top cover assembly, including a top cover plate 11 and the aforementioned pole post structure with a multi-functional integrated hole. As an example, the pole post structure with a multi-functional integrated hole is mounted and fixed on the top cover plate 11.

[0043] This application also provides a secondary battery, including a battery casing and an electrode structure with multifunctional integrated holes as provided in any of the above embodiments, or including a battery casing and a top cover assembly as provided in the above embodiments. As an example, the secondary battery is a lithium-ion battery.

[0044] 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 post structure with a multifunctional integrated hole, characterized in that, include: The electrode body has a multi-functional integrated hole for detachable connection to the liquid injection device, and the side of the multi-functional integrated hole away from the inside of the battery has an installation step surface. A smart sensor is used to seal the mounting step surface after the battery is filled with electrolyte, and the smart sensor is configured to detect the temperature and pressure inside the battery.

2. The pole post structure with multifunctional integrated holes according to claim 1, characterized in that, The intelligent sensor includes: 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. The dual sensors are used to detect the temperature and pressure inside the battery.

3. The pole post structure with multifunctional integrated holes according to claim 2, characterized in that, The intelligent sensor also includes: 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.

4. The pole post structure with multifunctional integrated holes according to claim 1, characterized in that, The intelligent sensor is sealed to the mounting step surface by laser welding, adhesive bonding, ultrasonic welding, or electric welding.

5. A top cover assembly, characterized in that, It includes a top cover plate and a pole post structure with a multifunctional integrated hole as described in any one of claims 1 to 4.

6. A secondary battery, characterized in that, Includes the battery casing and the top cover assembly as described in claim 5.

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