A rechargeable battery structure

Abstract

This utility model relates to the field of battery technology, and more specifically, to a rechargeable battery structure, including a conductive shell, a non-capacitor cell, an insulating cover, a circuit board, and a positive electrode cap. A first insulating layer is provided around the periphery of the positive terminal face of the non-capacitor cell. The outer wall of the non-capacitor cell, except for the positive terminal face, is covered with a conductive layer connected to the negative electrode, and the conductive layer is in at least partial contact with the conductive shell. The circuit board is provided with a charging interface, a positive conductive structure, and a negative conductive structure. The charging interface is exposed outside the conductive shell. The positive conductive structure abuts against the positive electrode of the non-capacitor cell, and the negative conductive structure abuts against the inner wall of the conductive shell. The positive electrode cap is electrically connected to the circuit board. A second insulating layer is provided on the outer wall of the conductive shell. This utility model's rechargeable battery structure uses a conductive shell with an insulating layer on the outer wall to mount the non-capacitor cell. The conductive shell acts as the negative electrode of the non-capacitor cell, thereby increasing the flexibility of the electrical contact between the circuit board and the positive and negative electrodes of the cell.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a rechargeable battery structure. Background Technology

[0002] Most commercially available batteries are disposable alkaline batteries, which cannot be reused after being depleted, leading to resource waste and environmental pollution. Therefore, rechargeable batteries have emerged. However, some rechargeable batteries require dedicated chargers, which is limiting. To address this, rechargeable batteries with USB interfaces have also appeared on the market.

[0003] Existing rechargeable batteries with USB interfaces have relatively complex structures. For example, a rechargeable battery with a USB interface disclosed in Chinese Patent Publication No. CN203013804U conducts electrical energy internally through wires, which limits power output and makes production and assembly inconvenient. Chinese Patent Publication No. CN221353116U discloses a rechargeable battery with better conductivity and a more stable structure, addressing the above problems. It includes a casing with an opening at the top. An electronic component is fixedly installed at the opening. A battery cell, electrically connected to the output terminal of the electronic component, is movably inserted into the casing. The electronic component includes a circuit board with a charging port electrically connected to one side. A negative electrode contact plate is welded to the negative output terminal of the charging port, movably abutting against the inner side of the casing. A contact plate is electrically connected to the positive output terminal of the circuit board.

[0004] While rechargeable batteries like those described above simplify the structure of USB-connected batteries, the market is increasingly flooded with USB-connected rechargeable batteries of various sizes. Rechargeable batteries can achieve the same capacity using smaller cells than traditional batteries, and conversely, using cells of the same size as traditional batteries can achieve a larger capacity. Therefore, cells of the same capacity can be used for rechargeable batteries of different sizes to meet diverse needs. Currently, most manufacturers need to produce multiple cell specifications and capacities for different sizes of rechargeable batteries to meet various user demands, resulting in high production costs. Furthermore, the cells in these improved rechargeable batteries are all capacitor cells, requiring the positive and negative conductive plates to be connected to the top and bottom of the capacitor cell respectively, thus significantly limiting the electrical contact between the positive and negative terminals. Utility Model Content

[0005] This utility model provides a rechargeable battery structure, which uses a conductive shell with an insulating layer on the outer wall to mount a non-capacitor cell, and covers the outer wall of the non-capacitor cell with a conductive layer connected to the negative electrode, while making the conductive layer at least partially in contact with the conductive shell, so that the conductive shell can act as the negative electrode of the non-capacitor cell, thereby increasing the flexibility of electrical contact between the circuit board and the positive and negative electrodes of the cell.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A rechargeable battery structure is provided, including a conductive shell with a cavity, a non-capacitor cell disposed within the cavity, an insulating cover detachably mounted on the conductive shell, a circuit board mounted within the insulating cover, and a positive electrode cap; a first insulating layer is provided around the periphery of the positive terminal face of the non-capacitor cell, and the outer wall of the non-capacitor cell, except for the positive terminal face, is covered with a conductive layer connected to the negative electrode, the conductive layer being in at least partial contact with the conductive shell; the circuit board is provided with a charging interface, a positive conductive structure, and a negative conductive structure; the insulating cover is provided with a first notch and a second notch, the charging interface passing through the first notch and exposed outside the conductive shell, the positive conductive structure abutting against the positive electrode of the non-capacitor cell, and the negative conductive structure abutting against the inner wall of the conductive shell through the second notch; the positive electrode cap is inserted into the insulating cover and electrically connected to the circuit board; the outer wall of the conductive shell is covered with a second insulating layer.

[0008] Preferably, the positive electrode conductive structure / negative electrode conductive structure is a spring or pin soldered onto the circuit board.

[0009] Furthermore, the rechargeable battery structure also includes a fixing member for positioning the non-capacitor cell. The fixing member is sleeved on the outer wall of the conductive layer of the non-capacitor cell, and the thickness of the fixing member is exactly equal to the difference in cross-sectional radii between the conductive shell and the non-capacitor cell. The bottom of the conductive layer is in contact with the conductive shell.

[0010] Furthermore, the rechargeable battery structure also includes an annular support member. The upper end of the support member is sleeved on the outer wall of the conductive layer of the non-capacitor cell and abuts against the bottom end face of the fixing member. The lower end of the support member abuts against the inner bottom wall of the conductive shell. The bottom of the conductive layer contacts the inner bottom wall of the conductive shell through an elastic conductive member, which is disposed within the annular structure of the support member.

[0011] Preferably, the elastic conductive element is a spring with a connecting lug at one end, the end of the spring with the connecting lug abutting against the inner bottom wall of the conductive shell, and the other end abutting against the bottom of the conductive layer.

[0012] Optionally, the first notch is located on the upper surface of the insulating cover, and the charging interface passes through the first notch and is exposed on the upper surface of the insulating cover; the second notch is located on the side wall of the insulating cover; a first insertion interface is also provided on the periphery of the upper surface of the insulating cover; the positive cap is provided with pins, and the pins are electrically connected to the circuit board after being inserted into the first insertion interface.

[0013] Optionally, both the first and second notches are provided on the side wall of the insulating cover. An opening is provided at the upper end of the conductive shell corresponding to the first notch. The charging interface passes through the first notch and the opening in sequence and is exposed on the side wall of the conductive shell. A second insertion interface is also provided on the periphery of the upper end face of the insulating cover. The positive electrode cap is provided with a connecting foot with a barb. The connecting foot is inserted and fixed with the second insertion interface by interference fit through the barb. A third notch is also provided on the upper end face of the insulating cover. A positive electrode contact structure is also provided on the circuit board. The positive electrode contact structure passes through the third notch and abuts against the positive electrode cap.

[0014] Preferably, the conductive shell is a steel shell.

[0015] Preferably, the insulating cover is detachably installed on the conductive shell by a tight fit.

[0016] Compared with existing technologies, the rechargeable battery structure of this utility model simplifies the existing battery structure of USB series interfaces. It uses a non-capacitor cell with a conductive layer connected to the negative electrode covering its outer wall, and uses a conductive shell as the outer shell to house the cell. The conductive layer and the conductive shell are at least partially in contact, meaning that the entire conductive shell can act as the negative electrode of the non-capacitor cell. Therefore, when the positive conductive structure of the circuit board contacts the positive electrode of the non-capacitor cell, the negative conductive structure only needs to contact the inner wall of the conductive shell near the circuit board within a very small area. In other words, the negative conductive structure on the circuit board does not need to be set as a long strip-shaped conductive plate structure to connect with the negative electrode of the non-capacitor cell, which further simplifies the overall battery structure and makes the electrical contact between the circuit board and the positive and negative electrodes of the cell more flexible. Therefore, for rechargeable batteries of different sizes, as long as the negative conductive structure on the circuit board can contact any part of the inner wall of the conductive shell, cells of the same capacity can be used to meet different needs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the rechargeable battery in Embodiment 1 of this utility model.

[0018] Figure 2 This is an exploded view of the rechargeable battery structure in Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the circuit board for the rechargeable battery structure in Embodiment 1 of this utility model.

[0020] Figure 4 This is an exploded view of the rechargeable battery structure in Embodiment 2 of this utility model.

[0021] Figure 5 This is an exploded view of the rechargeable battery structure in Embodiment 3 of this utility model.

[0022] Figure 6 This is an exploded view of the rechargeable battery structure in Embodiment 4 of this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It should be understood that terms such as "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] like Figures 1 to 6 The image shows an embodiment of the rechargeable battery structure of this utility model.

[0025] Example 1

[0026] like Figure 1 , Figure 2 As shown, the rechargeable battery structure of this embodiment includes a conductive shell 10, a non-capacitor cell 20, an insulating cover 30, a circuit board 40, and a positive electrode cap 50. The conductive shell 10 has a cavity 11, and the non-capacitor cell 20 is disposed within the cavity 11. The insulating cover 30 is detachably mounted on the opening of the conductive shell 10 via a tight fit. The circuit board 40 is mounted inside the insulating cover 30, and the positive electrode cap 50 is inserted into the insulating cover 30 and electrically connected to the circuit board 40. It is understood that the connection between the insulating cover 30 and the conductive shell 10 could also be a snap-fit ​​type, but to simplify the structure and facilitate the assembly and disassembly of the overall structure, a tight fit is preferred. Furthermore, ribs or other reinforcements can be added to the insertion portion of the insulating cover 30 to increase stability.

[0027] like Figure 2 , Figure 3 As shown, a first insulating layer 21 is provided around the periphery of the positive terminal face of the non-capacitor cell 20 to prevent direct contact between the positive and negative terminals, which could lead to a short circuit. In addition to the outer wall of the positive terminal face, the non-capacitor cell 20 is covered with a conductive layer 22 connected to the negative terminal. The conductive layer 22 is in at least partial contact with the conductive shell 10. That is, the negative terminal of the non-capacitor cell 20 can be connected sequentially to the conductive layer 22 and the conductive shell 10. The conductive shell 10 can serve as the negative terminal of the cell 20 and be electrically connected to the circuit board 40. Figure 2 and Figure 3 As shown, the circuit board 40 is provided with a charging interface 41, a positive conductive structure 42, and a negative conductive structure 43. The insulating cover 30 has a first notch 31 and a second notch 32. The charging interface 41 passes through the first notch 31 and is exposed outside the conductive shell 10. The positive conductive structure 42 abuts against the positive electrode of the non-capacitor cell 20, and the negative conductive structure 43 abuts against the inner wall of the conductive shell 10 through the second notch 32. The outer wall of the conductive shell 10 is covered with a second insulating layer (not shown). The positive conductive structure 42 and the negative conductive structure 43 are spring contacts or pins soldered onto the circuit board 40. This embodiment mainly uses pins as the conductive contact structure, which occupies less space and is more flexible in use. Furthermore, since both spring contacts and pins can be standard parts, production costs can be saved and production efficiency improved.

[0028] In actual production, when assembling this rechargeable battery structure, the non-capacitor cell 20 is installed in the conductive shell 10, the circuit board 40 and the positive electrode cap 50 are respectively installed on the insulating cover 30, and finally the insulating cover 30 is tightly fitted and fixed to the opening of the conductive shell 10 to complete the assembly. The rechargeable battery structure of this embodiment simplifies the existing battery structure of the USB series interface. It uses a non-capacitor cell 20 and covers its outer wall with a conductive layer 22 connected to the negative electrode. The conductive shell 10 is used as the outer shell to house the cell 20, and the conductive layer 22 is at least partially in contact with the conductive shell 10. That is, the entire conductive shell 10 can act as the negative electrode of the non-capacitor cell 20. Therefore, when the positive conductive structure 42 of the circuit board 40 is in contact with the positive electrode of the non-capacitor cell 20, the negative conductive structure 43 only needs to be in contact with the inner wall of the conductive shell 10 near the circuit board 40 within a very small range. In other words, the negative conductive structure 43 on the circuit board 40 does not need to be set as a long strip-shaped conductive sheet to connect with the negative electrode of the non-capacitor cell 20, which further simplifies the overall structure of the battery and makes the electrical contact between the positive and negative electrodes of the circuit board 40 and the cell 20 more flexible. Therefore, for rechargeable batteries of different sizes, as long as the negative conductive structure 43 on the circuit board 40 can be in contact with any part of the inner wall of the conductive shell 10, cells of the same capacity can be used to meet different needs.

[0029] Example 2

[0030] For batteries of different sizes, when using non-capacitor cells 20 of the same capacity, further improvements to the internal structure are required. For example... Figure 4 As shown, the rechargeable battery structure of this embodiment also includes a fixing member 12 for positioning the non-capacitor cell 20.

[0031] When the cross-sectional diameter of the non-capacitor cell 20 is smaller than the cross-sectional diameter of the conductive shell 10 (after the positive conductive structure 42 of the circuit board 40 contacts the positive electrode of the cell 20, the negative electrode of the cell 20 can directly contact the inner bottom wall of the conductive shell 10 through the bottom of the conductive layer 22), the fixing member 12 is sleeved on the outer wall of the conductive layer 22 of the non-capacitor cell 20. The thickness of the fixing member 12 is exactly equal to the difference in cross-sectional radii between the conductive shell 10 and the non-capacitor cell 20, so the cell 20 can be fixed by interference fit; the bottom of the conductive layer 22 then contacts the conductive shell 10. It is understood that the width of the fixing member 12 should be smaller than the length of the cell 20 to avoid the end affecting the contact between the negative conductive structure 43 of the circuit board 40 and the inner wall of the conductive shell 10. In addition, the fixing member 12 can be made of insulating materials such as TPU and rubber. That is, for rechargeable batteries with larger diameter specifications, the same capacity non-capacitor cell 20 can be used through the fixing member 12, without the need to produce cells of different sizes, reducing production costs and improving work efficiency.

[0032] As an improvement to this embodiment, such as Figure 4 As shown, the rechargeable battery structure also includes an annular support member 13.

[0033] When the length of the non-capacitor cell 20 is less than the depth of the cavity 11 of the conductive shell 10 (excluding the depth occupied by the insulating cover 30), a support member 13 can be used to extend the overall length of the cell 20. The upper end of the support member 13 is fitted onto the outer wall of the conductive layer 22 of the non-capacitor cell 20 and abuts against the bottom end face of the fixing member 12. At the same time, the lower end of the support member 13 abuts against the inner bottom wall of the conductive shell 10. The bottom of the conductive layer 22 is contacted with the inner bottom wall of the conductive shell 10 by an elastic conductive member (not shown). The elastic conductive member is set inside the annular structure 131 of the support member 13 to prevent its displacement from affecting the conduction of the negative electrode of the cell 20. The elastic conductive member can be a spring with a connecting lug at one end. The end of the spring with the connecting lug abuts against the inner bottom wall of the conductive shell 10, and the other end abuts against the bottom of the conductive layer 22. The spring can be a tower-shaped spring.

[0034] It should be noted that, since batteries come in various sizes and specifications, the fixing component 12, the ring support component 13, and the elastic conductive component can be used individually or in combination as needed, and are not limited to the application in this embodiment.

[0035] Example 3

[0036] The position of the charging interface 41 in the rechargeable battery structure of this embodiment can be designed and adjusted according to different application scenarios. In this embodiment, for example... Figure 5 As shown, the first notch 31 is provided on the upper surface of the insulating cover 30, and the charging interface 41 passes through the first notch 31 and is exposed on the upper surface of the insulating cover 30; the second notch 32 is provided on the side wall of the insulating cover 30; a first insertion interface 33 is also provided on the periphery of the upper surface of the insulating cover 30; the positive cap 50 is provided with a pin 51, and the pin 51 is inserted into the first insertion interface 33 and electrically connected to the circuit board 40.

[0037] Example 4

[0038] The position of the charging interface 41 in the rechargeable battery structure of this embodiment can be designed and adjusted according to different application scenarios. In this embodiment, for example... Figure 6 As shown, the first notch 31 and the second notch 32 are both provided on the side wall of the insulating cover 30. The upper end of the conductive shell 10 is provided with an opening 12 at the position corresponding to the first notch 31. The charging interface 41 passes through the first notch 31 and the opening 12 in sequence and is exposed on the side wall of the conductive shell 10. The upper end face of the insulating cover 30 is also provided with a second insertion interface 34. The positive cap 50 is provided with a connecting foot 52 with a barb 521. The connecting foot 52 is inserted and fixed to the second insertion interface 34 by interference fit through the barb 521. The upper end face of the insulating cover 30 is also provided with a third notch 35. The circuit board 40 is also provided with a positive contact structure 44. The positive contact structure 44 passes through the third notch 35 and abuts against the positive cap 50.

[0039] Furthermore, in this embodiment of the present invention, the conductive shell 10 is a steel shell. It should be noted that, in addition to steel (carbon steel or stainless steel), the conductive shell 10 can also be made of other metals or alloys with conductive properties, such as nickel (alloy), titanium, etc. However, considering factors such as cost, the conductive shell 10 of the rechargeable battery structure of the present invention preferably uses a steel shell.

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rechargeable battery structure, characterized in that, It includes a conductive shell with a cavity, a non-capacitor cell disposed in the cavity, an insulating cover detachably mounted on the conductive shell, a circuit board mounted in the insulating cover, and a positive electrode cap; The positive terminal face of the non-capacitor cell is provided with a first insulating layer around its periphery. In addition to the outer wall of the positive terminal face, the non-capacitor cell is covered with a conductive layer connected to the negative terminal. The conductive layer is in at least partial contact with the conductive shell. The circuit board is provided with a charging interface, a positive conductive structure and a negative conductive structure. The insulating cover is provided with a first notch and a second notch. The charging interface passes through the first notch and is exposed outside the conductive shell. The positive conductive structure abuts against the positive electrode of the non-capacitor cell. The negative conductive structure passes through the second notch and abuts against the inner wall of the conductive shell. The positive electrode cap is inserted into the insulating cover and electrically connected to the circuit board; The outer wall of the conductive shell is covered with a second insulating layer.

2. The rechargeable battery structure according to claim 1, characterized in that, The positive conductive structure / negative conductive structure is a spring or pin soldered onto the circuit board.

3. The rechargeable battery structure according to claim 2, characterized in that, The rechargeable battery structure also includes a fixing member for positioning the non-capacitor cell. The fixing member is sleeved on the outer wall of the conductive layer of the non-capacitor cell, and the thickness of the fixing member is exactly equal to the difference in cross-sectional radii between the conductive shell and the non-capacitor cell. The bottom of the conductive layer is in contact with the conductive shell.

4. The rechargeable battery structure according to claim 3, characterized in that, The rechargeable battery structure also includes an annular support member. The upper end of the support member is sleeved on the outer wall of the conductive layer of the non-capacitor cell and abuts against the bottom end face of the fixing member. The lower end of the support member abuts against the inner bottom wall of the conductive shell. The bottom of the conductive layer contacts the inner bottom wall of the conductive shell through an elastic conductive member, which is disposed within the annular structure of the support member.

5. The rechargeable battery structure according to claim 4, characterized in that, The elastic conductive element is a spring with a connecting lug at one end. The end of the spring with the connecting lug abuts against the inner bottom wall of the conductive shell, and the other end abuts against the bottom of the conductive layer.

6. The rechargeable battery structure according to claim 1, characterized in that, The first notch is located on the upper surface of the insulating cover, and the charging interface passes through the first notch and is exposed on the upper surface of the insulating cover; the second notch is located on the side wall of the insulating cover; a first insertion interface is also provided on the periphery of the upper surface of the insulating cover; the positive cap is provided with a pin, and the pin is inserted into the first insertion interface and electrically connected to the circuit board.

7. The rechargeable battery structure according to claim 1, characterized in that, The first notch and the second notch are both provided on the side wall of the insulating cover. The upper end of the conductive shell is provided with an opening at the position corresponding to the first notch. The charging interface passes through the first notch and the opening in sequence and is exposed on the side wall of the conductive shell. The upper surface of the insulating cover is also provided with a second insertion interface; the positive electrode cap is provided with a connecting foot with a barb, and the connecting foot is inserted and fixed with the second insertion interface by interference fit through the barb; the upper surface of the insulating cover is also provided with a third notch, and the circuit board is also provided with a positive electrode contact structure, which passes through the third notch and abuts against the positive electrode cap.

8. The rechargeable battery structure according to any one of claims 1 to 7, characterized in that, The conductive shell is a steel shell.

9. The rechargeable battery structure according to any one of claims 1 to 7, characterized in that, The insulating cover is detachably installed on the conductive shell by a tight fit.

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