Intelligent top cover and battery

Abstract

The utility model discloses an intelligent top cover and a battery, and belongs to the technical field of batteries. The intelligent top cover comprises a top cover piece and double sensors installed on the top cover piece, the double sensors comprise substrates, and the substrates are welded to the top cover piece; the circuit board is arranged below the substrate; the packaging seat is provided with a step used for supporting the circuit board, and the packaging seat is connected with the circuit board in a sealing manner and is connected with the substrate in a sealing manner; the thin film is arranged at the bottom of the packaging base, and an internal space used for being filled with silicone oil is formed among the packaging base, the circuit board and the thin film; and the pressure and temperature sensing chip is used for being installed on the circuit board and arranged in the internal space, and the pressure and temperature sensing chip is used for detecting the temperature and the pressure in the battery. According to the intelligent top cover and the battery provided by the embodiment of the invention, the pressure and temperature in the battery can be accurately monitored at the same time, and the structure is simple.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a smart top cover and a battery. Background Art

[0002] When a secondary battery is overcharged, the electrolyte inside the battery will decompose, causing the internal pressure of the battery to increase, which may cause the battery to catch fire and explode. To avoid this, an explosion-proof device is usually installed on the top of the battery, including a disposable explosion-proof membrane and a reusable explosion-proof valve. In addition, when a secondary battery is overcharged or short-circuited, its internal temperature will increase along with the battery pressure, and the increased temperature will increase the risk of battery fire and explosion.

[0003] At present, there are some problems with the temperature and pressure detection methods of secondary batteries. For example, the temperature detection method cannot accurately reflect the actual temperature inside the battery, the pressure detection method has a large error in measurement, and the temperature and pressure need to be detected by different detection devices, resulting in a relatively complex structure of the secondary battery and the detection device. Therefore, it is necessary to provide a device that can accurately monitor the pressure and temperature inside the secondary battery at the same time and has a simple structure to solve the above problems. Utility Model Content

[0004] The present application provides a smart top cover and a battery to solve the above-mentioned problems.

[0005] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0006] In a first aspect, an embodiment of the present application provides a smart top cover, comprising: a top cover sheet and a dual sensor mounted on the top cover sheet, wherein the dual sensor comprises:

[0007] A base plate, the base plate being welded to the top cover sheet;

[0008] A circuit board, wherein the circuit board is arranged below the substrate;

[0009] A packaging seat, wherein the packaging seat is provided with a step for supporting the circuit board, and the packaging seat is sealed and connected to the circuit board, and the packaging seat is sealed and connected to the substrate;

[0010] A film, wherein the film is arranged at the bottom of the packaging seat, and an internal space for filling with silicone oil is formed between the packaging seat, the circuit board and the film;

[0011] A pressure and temperature sensor chip is installed on the circuit board and arranged in the internal space. The pressure and temperature sensor chip is used to detect the temperature and pressure inside the battery.

[0012] Optionally, the dual sensor further includes:

[0013] A pin needle, one end of which is connected to the pressure and temperature sensor chip through a gold wire, and the other end of which passes through the circuit board and is used to connect to an external circuit or system.

[0014] Optionally, the pin is made of copper.

[0015] Optionally, the pin and the circuit board are connected by ceramic welding.

[0016] Optionally, an oil injection hole for injecting the silicone oil is provided on the circuit board.

[0017] Optionally, the film and the packaging seat are integrated by an injection molding process.

[0018] Optionally, the packaging seat is made of PFA material.

[0019] In a second aspect, an embodiment of the present application provides a battery, including the smart top cover provided in the first aspect above.

[0020] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0021] The smart top cover and battery provided in the embodiments of the present application can accurately monitor the pressure and temperature inside the battery at the same time and have a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application is shown;

[0024] Figure 2 A schematic diagram of the structure of a dual sensor provided in an embodiment of the present application is shown;

[0025] Figure 3 An exploded view of a dual sensor provided in an embodiment of the present application is shown;

[0026] Figure 4 An exploded view of a dual sensor provided in an embodiment of the present application is shown;

[0027] Figure 5 A cross-sectional view of a dual sensor provided in an embodiment of the present application is shown.

[0028] Illustration Description:

[0029] 100, aluminum shell; 200, top cover; 300, pole assembly; 400, injection hole; 500, explosion-proof valve assembly; 600, dual sensor;

[0030] 11. Pin needle; 12. Pressure and temperature sensor chip; 13. Circuit board; 131. Oil filling hole; 14. Base plate; 15. Connection position; 16. Gold wire; 17. Package seat; 18. Silicone oil; 19. Film. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with 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.

[0032] 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.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0035] See also Figure 1 As shown, the embodiment of the present application provides a smart top cover, which can be applied to Figure 1 The battery shown.

[0036] like Figure 1 As shown, the battery includes an aluminum shell 100 and a smart top cover, the smart top cover includes a top cover sheet 200, a pole assembly 300, an explosion-proof valve assembly 500 and a dual sensor 600, the pole assembly 300, the explosion-proof valve assembly 500 and the dual sensor 600 are respectively arranged on the top cover sheet 200, and a liquid injection hole 400 is opened on the top cover sheet 200.

[0037] The dual sensor 600 provided in the embodiment of the present application can accurately monitor the pressure and temperature inside the battery at the same time and has a simple structure.

[0038] See also Figures 2 to 5 As shown, the dual sensor 600 includes: a substrate 14 , a circuit board 13 , a package seat 17 , a film 19 , a pressure and temperature sensor chip 12 , a pin needle 11 , and a gold wire 16 .

[0039] The base plate 14 and the top cover plate 200 are laser welded, for example, Figure 5 The connection position 15 shown is welded. The circuit board 13 is arranged below the substrate 14, and the packaging seat 17 is provided with a step for supporting the circuit board 13, and the packaging seat 17 and the circuit board 13 are sealed and connected, and the packaging seat 17 and the substrate 14 are sealed and connected. The film 19 is arranged at the bottom of the packaging seat 17, and an internal space for filling silicone oil 18 is formed between the packaging seat 17, the circuit board 13 and the film 19. The pressure and temperature sensor chip 12 is mounted on the circuit board 13 and arranged in the internal space. The pressure and temperature sensor chip 12 is used to detect the temperature and pressure inside the battery. One end of the pin needle 11 is connected to the pressure and temperature sensor chip 12 through the gold wire 16, and the other end passes through the circuit board 13 and is used to connect to an external circuit or system.

[0040] In some embodiments, the substrate 14 may be an aluminum substrate or a copper substrate.

[0041] In some embodiments, the pressure and temperature sensor chip 12 includes an integrated pressure and temperature sensor and a digital signal processor. For example, the pressure and temperature sensor is used to detect the temperature and pressure inside the battery, and the digital signal processor converts the detection information into a digital signal.

[0042] In some embodiments, the film 19 and the packaging seat 17 are integrated by injection molding. In some embodiments, the packaging seat 17 is made of PFA (Polyfluoroalkoxy, soluble polytetrafluoroethylene). In this way, the packaging seat 17 and the substrate 14 can form a compression amount to achieve a sealing effect.

[0043] In some embodiments, the pin needle 11 is made of copper. In some embodiments, the pin needle 11 and the circuit board 13 are connected by ceramic welding to ensure sealing.

[0044] In some embodiments, the circuit board 13 is provided with an oil injection hole 131 for injecting silicone oil 18. For example, after all the above structures are assembled and welded, the oil injection is finally performed, and the silicone oil 18 enters the internal space from the oil injection hole 131. After the oil injection is completed, the oil injection hole 131 can be sealed by a traditional steel ball seal or other methods.

[0045] It should be understood that the packaging seat 17 made of PFA material has a sealing function after being extruded.

[0046] In some embodiments, the shape of the dual sensor 600 is not limited to a circle, and may also be a square or an ellipse.

[0047] In some embodiments, the size of the dual sensor 600 is not limited and a suitable size can be designed according to needs.

[0048] In some embodiments, a space is provided between the circuit board 13 and the substrate 14 .

[0049] In some embodiments, since the welding process can be put at the end and performed before oil injection, the influence of high temperature on the structure after silicone oil 18 packaging can be prevented.

[0050] Therefore, the working principle of the smart top cover provided above is:

[0051] When the air pressure or temperature changes inside the battery cell due to some faults, the energy is transmitted to the film 19. The film 19 is elastic and transmits the energy to the pressure and temperature sensor through the silicone oil 18. The detection information is converted into a digital signal by the digital signal processor and transmitted to the external circuit or system through the gold wire 16 and the pin needle 11. Finally, it can be processed by a computer connected to the external circuit or system to form an effective monitoring or early warning function.

[0052] In summary, the smart top cover and battery provided in the embodiments of the present application can accurately monitor the pressure and temperature inside the battery at the same time and have a simple structure.

[0053] The embodiments described above 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 aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions 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 smart top cover, characterized in that: include: A top cover sheet and a dual sensor mounted on the top cover sheet, wherein the dual sensor comprises: A base plate, the base plate being welded to the top cover sheet; A circuit board, wherein the circuit board is arranged below the substrate; A packaging seat, wherein the packaging seat is provided with a step for supporting the circuit board, and the packaging seat is sealed and connected to the circuit board, and the packaging seat is sealed and connected to the substrate; A film, wherein the film is arranged at the bottom of the packaging seat, and an internal space for filling with silicone oil is formed between the packaging seat, the circuit board and the film; A pressure and temperature sensor chip is installed on the circuit board and arranged in the internal space. The pressure and temperature sensor chip is used to detect the temperature and pressure inside the battery.

2. The smart top cover according to claim 1, characterized in that: The dual sensor also includes: A pin needle, one end of which is connected to the pressure and temperature sensor chip through a gold wire, and the other end of which passes through the circuit board and is used to connect to an external circuit or system.

3. The smart top cover according to claim 2, characterized in that: The pin is made of copper.

4. The smart top cover according to claim 2, characterized in that: The pin needle and the circuit board are connected by ceramic welding.

5. The smart top cover according to claim 1, characterized in that: The circuit board is provided with an oil injection hole for injecting the silicone oil.

6. The smart roof according to claim 1, characterized in that: The film and the packaging seat are integrated through an injection molding process.

7. The smart top cover according to claim 1, characterized in that: The packaging seat is made of PFA material.

8. A battery, characterized in that: The smart top cover comprises any one of claims 1 to 7.

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