Cylindrical battery with built-in sensor

Abstract

The utility model relates to a cylindrical battery with a built-in sensor. The battery comprises a shell, a roll core, an ultrasonic sensor, a positive electrode connecting piece, a negative electrode connecting piece and a lead, the roll core is arranged in the shell, and tabs are arranged at two ends of the roll core. The ultrasonic sensor is embedded in the center of the roll core and is used for transmitting an ultrasonic signal to detect the internal state of the cylindrical battery. And the positive connecting sheet is arranged at one end of the shell and is connected with a tab at one end of the roll core. The cathode connecting piece is arranged at the other end of the shell and is connected with a tab at the other end of the roll core, a top cover is arranged on one surface, deviating from the roll core, of the cathode connecting piece, and a sealing ring is arranged between the top cover and the shell. The wire is arranged on the top cover and used for being connected with the ultrasonic sensor for power supply and signal conduction. The ultrasonic sensor is embedded in the roll core, and the signal of the ultrasonic sensor is led out through the wire, so that the internal state of the battery can be detected in real time through subsequent related signal analysis, early warning can be carried out in time to replace the battery, and accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a cylindrical battery with a built-in sensor. Background Art

[0002] Existing cylindrical batteries generally monitor the battery status by detecting the external temperature of the battery, but are unable to monitor the lithium plating / short-circuit status inside the battery in real time. Once the lithium plating dendrites are too long and pierce the diaphragm to cause a short circuit, the temperature will rise rapidly, and the time left for personnel to react and deal with the problem is too short, which can easily cause accidents and casualties. Utility Model Content

[0003] The purpose of the utility model is to provide a cylindrical battery with a built-in sensor, which can embed an ultrasonic sensor inside the winding core and lead out the signal of the ultrasonic sensor through a wire so that subsequent relevant signal analysis can be performed to detect the internal status of the battery in real time, and then timely warning and battery replacement can be carried out to avoid accidents.

[0004] To achieve the above-mentioned object, the present invention provides a cylindrical battery with a built-in sensor, comprising:

[0005] case;

[0006] A winding core is arranged in the shell, and pole ears are arranged at both ends of the winding core;

[0007] An ultrasonic sensor, embedded in the center of the winding core, is used to emit ultrasonic signals to detect the internal state of the cylindrical battery;

[0008] A positive electrode connecting piece, provided at one end of the shell and connected to the tab at one end of the winding core;

[0009] a negative electrode connecting piece, disposed at the other end of the housing and connected to the tab at the other end of the winding core; a top cover is provided on the side of the negative electrode connecting piece facing away from the winding core, and a sealing ring is provided between the top cover and the housing;

[0010] A wire is provided on the top cover and is used for connecting the ultrasonic sensor for power supply and signal transmission.

[0011] Optionally, a bent portion is provided on a side of the negative electrode connecting piece facing the top cover, the bent portion is welded to the top cover, and a gap exists between the negative electrode connecting piece and the top cover.

[0012] Optionally, a through hole is opened in the center of the negative electrode connecting piece, one end of the wire is adhered to the side of the top cover away from the negative electrode connecting piece, and the other end of the wire is bent and extends into the gap between the top cover and the negative electrode connecting piece to the through hole.

[0013] Optionally, plug-in ports are provided at both ends of the wire.

[0014] Optionally, the end of the ultrasonic sensor extends into the through hole and is connected to the plug port at one end of the wire.

[0015] Optionally, the middle portion of the top cover protrudes outward to form a avoidance portion corresponding to the position of the through hole, and the avoidance portion is used to avoid the connection between the wire and the ultrasonic sensor.

[0016] Optionally, the shell is bent inward near the other end to form a first bending ring, and the first bending ring is used to limit and fix the winding core.

[0017] Optionally, the sealing ring is provided on the first bending ring and is used to wrap the edge of the top cover for sealing.

[0018] Optionally, the other end of the shell is bent inward to form a second bending ring, and the second bending ring is used to bend the sealing ring to press the edge of the top cover.

[0019] The beneficial effect of the present invention is that by embedding an ultrasonic sensor inside the winding core and leading out the signal of the ultrasonic sensor through a wire, relevant signal analysis can be performed later to detect the internal status of the battery in real time, thereby enabling timely warning and battery replacement to avoid accidents.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic exploded structural diagram of a cylindrical battery with a built-in sensor shown in one embodiment of the present invention;

[0022] Figure 2 This is a schematic structural cross-sectional view of the negative electrode connecting plate and top cover of a cylindrical battery with a built-in sensor shown in one embodiment of the present invention;

[0023] In the figure: 1. Shell; 11. First bending ring; 12. Second bending ring; 2. Winding core; 3. Ultrasonic sensor; 4. Positive electrode connecting piece; 5. Negative electrode connecting piece; 51. Bend portion; 52. Through hole; 6. Wire; 7. Top cover; 71. Avoidance portion; 8. Sealing ring. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] See Figure 1 and Figure 2 A cylindrical battery with a built-in sensor shown in a preferred embodiment of the present application includes a shell 1, a core 2, an ultrasonic sensor 3, a positive electrode connecting piece 4, a negative electrode connecting piece 5 and a wire 6. The core 2 is arranged in the shell 1, and tabs are provided at both ends of the core 2. The ultrasonic sensor 3 is embedded in the center of the core 2 and is used to emit ultrasonic signals to detect the internal state of the cylindrical battery. The positive electrode connecting piece 4 is arranged at one end of the shell 1 and is connected to the tab at one end of the core 2. The negative electrode connecting piece 5 is arranged at the other end of the shell 1 and is connected to the tab at the other end of the core 2. A top cover 7 is provided on the side of the negative electrode connecting piece 5 facing away from the core 2, and a sealing ring 8 is provided between the top cover 7 and the shell 1. The wire 6 is arranged on the top cover 7 and is used to connect the ultrasonic sensor 3 for power supply and signal transmission.

[0028] According to the solution of the embodiment of the present utility model, an ultrasonic sensor 3 is embedded inside the winding core 2, and the signal of the ultrasonic sensor 3 is led out through the wire 6, so that subsequent relevant signal analysis can be performed to detect the internal status of the battery in real time, and then timely warning and battery replacement can be carried out to avoid accidents.

[0029] The following is a detailed description with specific embodiments:

[0030] See Figure 1 and Figure 2 The negative electrode connecting piece 5 has a bent portion 51 on the side facing the top cover 7. The bent portion 51 is welded to the top cover 7, leaving a gap between the negative electrode connecting piece 5 and the top cover 7. A through hole 52 is formed in the center of the negative electrode connecting piece 5. One end of the wire 6 is adhered to the side of the top cover 7 facing away from the negative electrode connecting piece 5. The other end of the wire 6 is bent and extends into the gap between the top cover 7 and the negative electrode connecting piece 5 to the through hole 52.

[0031] During battery assembly, first, after the core 2 is wound and finished, the tab is flattened and laser-welded to the positive electrode adapter. Then, the core 2 with the positive electrode connecting tab 4 welded is placed in the shell 1, and the positive electrode adapter is welded to the shell 1 using ultrasonic torque welding. The ultrasonic sensor 3 is then embedded in the center of the core 2. Finally, the negative electrode adapter is laser-spot-welded to the flattened tab, and then the tab is injected with liquid, bent, and sealed. During this process, the ultrasonic sensor 3 embedded in the core 2 needs to be connected to the wire 6. Therefore, by connecting the bent portion 51 of the negative electrode connecting tab 5 to the top cover 7, a gap that can accommodate the wire 6 is generated between the negative electrode connecting tab 5 and the top cover 7, and then a through hole 52 is opened on the negative electrode connecting tab 5, so that the ultrasonic sensor 3 embedded in the core 2 can extend into the gap through the through hole 52 and connect to the wire 6 to achieve signal conduction.

[0032] Furthermore, both ends of the wire 6 are provided with plug-in ports (not shown). The end of the ultrasonic sensor 3 extends into the through-hole 52 and connects to the plug-in port at one end of the wire 6. The provision of the plug-in port facilitates the connection between the ultrasonic sensor 3 and the wire 6. Furthermore, one end of the wire 6 extends out and adheres to the top cover 7, where it is also provided with a plug-in port, facilitating connection to other devices for signal extraction.

[0033] See Figure 2 Furthermore, the center of the top cover 7 is convex outward to form a relief portion 71 corresponding to the position of the through hole 52. The relief portion 71 is used to avoid the connection between the wire 6 and the ultrasonic sensor 3. The provision of the relief portion 71 can expand the gap between the top cover 7 and the negative electrode connection plate, making it easier to connect the ultrasonic sensor 3 and the wire 6.

[0034] See Figure 2The housing 1 is bent inward near the other end to form a first bending ring 11, which is used to limit and fix the winding core 2. The sealing ring 8 is disposed on the first bending ring 11 and is used to wrap around the edge of the top cover 7 to seal it. The other end of the housing 1 is bent inward to form a second bending ring 12, which is used to bend the sealing ring 8 to compress the edge of the top cover 7.

[0035] See Figure 2 The shell 1 is originally in a vertical state. After the winding core 2 is placed in, the shell 1 is bent to form a first bending ring 11, and then the sealing ring 8 is placed on the first bending ring 11. After the negative electrode connecting piece 5 is welded to the tab, the ultrasonic sensor 3 is inserted into the plug-in port of the wire 6. The negative electrode connecting piece 5 drives the top cover 7 to press on the sealing ring 8. The shell 1 is then bent to form a second bending ring 12, and the sealing ring 8 is bent together and pressed on the top cover 7. The sealing ring 8 can press one end of the wire 6 on the top cover 7 together, and the sealing of the shell 1 is achieved by compression of the sealing ring 8. In this process, the provision of the first bending ring 11 can, on the one hand, compress and fix the winding core 2 placed in the shell 1, and on the other hand, provide a position for placing the sealing ring 8. The provision of the second bending ring 12 can press the end of the sealing ring 8 on the edge of the top cover 7 to achieve sealing.

[0036] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A cylindrical battery with a built-in sensor, characterized in that: include: case; A winding core is arranged in the shell, and pole ears are arranged at both ends of the winding core; An ultrasonic sensor, embedded in the center of the winding core, for emitting ultrasonic signals to detect the internal state of the cylindrical battery; A positive electrode connecting piece, provided at one end of the shell and connected to the tab at one end of the winding core; a negative electrode connecting piece, disposed at the other end of the housing and connected to the tab at the other end of the winding core; a top cover is provided on the side of the negative electrode connecting piece facing away from the winding core, and a sealing ring is provided between the top cover and the housing; A wire is provided on the top cover and is used to connect the ultrasonic sensor for power supply and signal transmission.

2. The cylindrical battery with built-in sensor according to claim 1, characterized in that: A bent portion is provided on a side of the negative electrode connecting piece facing the top cover. The bent portion is welded to the top cover, and a gap is provided between the negative electrode connecting piece and the top cover.

3. The cylindrical battery with built-in sensor according to claim 2, characterized in that: A through hole is opened in the center of the negative electrode connecting piece. One end of the wire is adhered to the side of the top cover away from the negative electrode connecting piece, and the other end of the wire is bent and extends into the gap between the top cover and the negative electrode connecting piece to the through hole.

4. The cylindrical battery with a built-in sensor according to claim 3, characterized in that: Both ends of the wire are provided with plug-in ports.

5. The cylindrical battery with built-in sensor according to claim 4, characterized in that: The end of the ultrasonic sensor extends into the through hole and is connected to the plug port at one end of the wire.

6. The cylindrical battery with a built-in sensor according to claim 5, characterized in that: The middle portion of the top cover protrudes outward to form a relief portion corresponding to the position of the through hole, and the relief portion is used to avoid the connection between the wire and the ultrasonic sensor.

7. The cylindrical battery with a built-in sensor according to claim 1, characterized in that: The shell is bent inward near the other end to form a first bending ring, and the first bending ring is used to limit and fix the winding core.

8. The cylindrical battery with a built-in sensor according to claim 7, characterized in that: The sealing ring is arranged on the first bending ring and is used to wrap the edge of the top cover for sealing.

9. The cylindrical battery with a built-in sensor according to claim 8, characterized in that: The other end of the shell is bent inward to form a second bending ring, and the second bending ring is used to bend the sealing ring to press the edge of the top cover.

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