A lithium battery with a removable and replaceable battery pack

Abstract

This utility model discloses a lithium battery with a detachable and replaceable battery pack, aiming to improve the convenience and flexibility of battery replacement. The lithium battery consists of a shell and a battery pack body. The shell is divided into a cover and a base. The base has a limiting groove and a recess for fixing the battery pack body. Stable installation is achieved by the inner protrusion of the annular block. The battery pack body includes a circuit board, an upper bracket, a lower bracket, and multiple battery cells. The battery cells are clamped and fixed by the upper and lower brackets and are connected to the circuit board for conductivity through upper and lower nickel strips. The circuit board has pluggable conductive connectors for easy connection to external devices. This structure allows users to easily replace the entire battery pack body or only the battery cells, which is suitable for different needs. Directly replacing the battery pack body is simple and quick, suitable for overall aging or damage; while replacing the battery cells is more economical and environmentally friendly, suitable for situations where the battery cells are aging but the external structure is intact. Both replacement methods coexist, making it convenient for users to operate.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a lithium battery with a detachable and replaceable battery pack. Background Technology

[0002] With the increasing popularity of portable electronic devices and the growing demand for longer battery life, removable and replaceable battery designs have gradually become a focus of market attention. Traditional fixed battery designs have many inconveniences, such as requiring professional disassembly and replacement after battery aging, which is costly and complicated; at the same time, once a battery malfunctions, it often needs to be replaced entirely, which not only wastes resources but also increases the user's operating costs.

[0003] To meet users' demands for convenient and cost-effective battery replacement, some designs with removable and replaceable batteries have emerged. However, these designs often only offer the option to replace the entire battery pack. While this improves convenience to some extent, it doesn't fully consider the reuse value of the internal battery cells. When the external structure of the battery pack is still intact, but the internal cells have aged due to long-term use, replacing the entire battery pack is undoubtedly wasteful. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a lithium battery with a detachable and replaceable battery pack, which can effectively solve the technical problem that the internal battery pack of current lithium batteries cannot be detached and replaced.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A lithium battery with a detachable and replaceable battery pack includes a housing and a battery pack body. The battery pack body is detachably installed inside the housing. The housing is composed of a cover and a base. The base has a limiting groove. The bottom of the limiting groove has a recess for placing and fixing the battery pack body. An annular block is installed in the limiting groove. The inner side of the annular block protrudes towards the center of the recess to fix the battery pack body. The cover is detachably installed on the base and completely covers the battery pack body.

[0007] The battery pack consists of a circuit board, an upper bracket, a lower bracket, and multiple battery cells. The upper and lower brackets are arranged in parallel and closely attached to the inner wall of the groove. The battery cells are placed between the upper and lower brackets and clamped and fixed. The top of the upper bracket is provided with an upper nickel strip that is welded and fixed to one end of the positive electrode of all the battery cells. The bottom of the lower bracket is provided with a lower nickel strip that is welded and fixed to one end of the negative electrode of all the battery cells. The circuit board is installed on one side of the upper and lower brackets and is simultaneously connected to the upper and lower nickel strips for conductivity. The circuit board is provided with pluggable conductive connectors.

[0008] Furthermore, the base has several L-shaped locking holes distributed around the periphery of the limiting groove. One end of the locking hole is connected to the top of the base, and the other end is connected to the outside of the base. The side of the cover that connects to the base is provided with several barbs that are inserted into the locking holes for locking. Each barb corresponds to a locking hole.

[0009] Furthermore, the cover has a protrusion at one end near the base, which is embedded in the limiting groove to press the annular block.

[0010] Furthermore, the cover is provided with a power supply interface for power supply, and the power supply interface is connected to a conductive connector.

[0011] Furthermore, the bottom of the upper bracket is provided with several upper slots for inserting battery cells, and the top of the upper bracket is provided with several upper openings that communicate with the bottom of the upper slots. The upper nickel bar is placed in the upper openings. The top of the lower bracket is provided with several lower slots for inserting battery cells, and the bottom of the lower bracket is provided with several lower openings that communicate with the bottom of the lower slots. The lower nickel bar is placed in the lower openings.

[0012] Furthermore, one end of both the upper bracket and the lower bracket is provided with a recess for embedding and mounting the circuit board, and the four corners of the circuit board are locked and fixed to the upper bracket / lower bracket by the first locking member.

[0013] Furthermore, a number of support rods distributed around the battery cell are connected between the upper bracket and the lower bracket, and the two ends of the support rods are locked and fixed to the upper bracket / lower bracket by a second locking member.

[0014] Furthermore, the outer side of the base is provided with several heat dissipation holes that communicate with the groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) The battery pack can be detachably installed inside the casing, allowing users to easily replace the battery pack without the need for professional tools or complicated operations, which greatly improves the convenience and efficiency of use.

[0017] (2) When users need to replace the battery, they have two options: one is to replace the entire battery pack directly, which is simple and quick and suitable for situations where the battery pack is aging or damaged; the other is to retain the external structure of the battery pack and only replace the internal cells, which is more economical and environmentally friendly and suitable for scenarios where the cells are aging but the external structure is still intact. The coexistence of these two replacement methods greatly improves the flexibility and convenience for users. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure and connection of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of the outer shell and the battery pack in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the cover in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the battery pack and the base in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the base in an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the top structure of the support frame in an embodiment of this utility model;

[0025] Figure 8 This is a schematic diagram of the bottom structure of the upper bracket in an embodiment of this utility model;

[0026] Figure 9 This is a schematic diagram of the top structure of the support frame in an embodiment of this utility model;

[0027] Figure 10 This is a schematic diagram of the bottom structure of the support frame in an embodiment of this utility model;

[0028] Numbering on the map:

[0029] 1-Outer casing, 2-Battery pack;

[0030] 11-Lid, 12-Base, 13-Ring block;

[0031] 21-Circuit board, 22-Upper bracket, 23-Lower bracket, 24-Battery cell, 25-Upper nickel bar, 26-Lower nickel bar, 27-First locking component, 28-Support rod, 29-Second locking component;

[0032] 111-Barb, 112-Protrusion, 113-Power supply interface;

[0033] 121-Limiting groove, 122-Groove, 123-Locking hole, 124-Heat dissipation hole;

[0034] 211-Conductive connector;

[0035] 221 - Upper card slot, 222 - Upper opening, 223 - Finger hole;

[0036] 231-Lower card slot, 232-Lower opening;

[0037] 2223 - Depression. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] like Figure 1-10 As shown, this utility model provides a lithium battery with a detachable and replaceable battery pack, which mainly includes a shell 1 and a battery pack 2. During assembly, the battery pack 2 is installed inside the shell 1 and forms a detachable structure, which facilitates the disassembly and replacement of the entire battery pack 2.

[0040] The outer casing 1 consists of two parts: a cover 11 and a base 12. These two parts are detachably connected to facilitate the replacement of the battery pack 2. The cover 11 is detachably mounted on the base 12 and can completely cover the battery pack 2, protecting it from external environmental influences. When removing the battery pack 2, it can be lifted out through the finger holes 223 on both sides of the upper bracket 22.

[0041] A limiting groove 121 is provided on the base 12, and the bottom of the limiting groove 121 is designed with a groove 122 for accurately placing and fixing the battery pack 2. An annular block 13 is also installed in the limiting groove 121. The inner side of the annular block 13 protrudes towards the center of the groove 122, and the battery pack 2 is firmly fixed in the groove 122 by physical compression.

[0042] The battery pack 2 consists of a circuit board 21, an upper bracket 22, a lower bracket 23, and multiple battery cells 24. The upper bracket 22 and lower bracket 23 are arranged parallel to each other and are tightly fitted against the inner wall of the groove 122. The battery cells 24 are positioned between the upper bracket 22 and lower bracket 23 and are clamped and fixed by them. The upper bracket 22 is connected to the positive terminal of the battery cell 24, and the lower bracket 23 is connected to the negative terminal of the battery cell 24. An upper nickel strip 25 is designed at the top of the upper bracket 22, which is fixedly connected to the positive terminal of all the battery cells 24 by spot welding. Similarly, a lower nickel strip 26 is designed at the bottom of the lower bracket 23, which is also fixedly connected to the negative terminal of all the battery cells 24 by spot welding. The circuit board 21 is mounted on one side of the upper bracket 22 and lower bracket 23 and is simultaneously connected to the upper nickel strip 25 and lower nickel strip 26 for electrical conduction, thereby enabling circuit control of the battery cells 24. The circuit board 21 is also equipped with a pluggable conductive connector 211 for easy connection to external devices for power supply. Because the internal structure of the battery pack 2 is relatively simple, when replacing the battery pack, users can either replace the entire battery pack 2 directly, or selectively replace the internal battery cells 24 while retaining the external frame structure of the battery pack 2. These two replacement methods coexist, offering good flexibility.

[0043] To further enhance the stability of the outer casing 1, several L-shaped locking holes 123 are provided inside the base 12, distributed around the periphery of the limiting groove 121. The side of the cover 11 connected to the base 12 is provided with several barbs 111 corresponding one-to-one with the locking holes 123. These barbs 111 can be inserted into the locking holes 123, thereby effectively locking the cover 11 and the base 12 together.

[0044] In addition, a protrusion 112 is designed at one end of the cover 11 near the base 12. The protrusion 112 can be embedded into the limiting groove 121 to further press the annular block 13 and ensure the stability of the battery pack 2 in the groove 122.

[0045] To better secure the battery cell 24 and facilitate rapid assembly after replacement, the upper bracket 22 has several upper slots 221 at its bottom for inserting the battery cell 24. Simultaneously, the upper bracket 22 also has several upper openings 222 at its top, communicating with the bottom of the upper slots 221. The upper nickel strip 25 is placed within these upper openings 222 and fixedly connected to the positive terminal of the battery cell 24 by spot welding. Similarly, the lower bracket 23 also has several lower slots 231 at its top for inserting the battery cell 24, and several lower openings 232 at its bottom, communicating with the bottom of the lower slots 231. The lower nickel strip 26 is placed within these lower openings 232 and fixedly connected to the negative terminal of the battery cell 24 by spot welding.

[0046] To facilitate the installation of the circuit board 21, a recess 2223 is designed at one end of both the upper bracket 22 and the lower bracket 23, allowing the circuit board 21 to be inserted into the recess 2223 for installation. Simultaneously, the four corners of the circuit board 21 are locked and fixed to the upper bracket 22 / lower bracket 23 by first locking members 27 to ensure its stability.

[0047] To further enhance the structural strength of the battery pack 2, several support rods 28 distributed around the battery cell 24 are connected between the upper bracket 22 and the lower bracket 23. The two ends of these support rods 28 are locked and fixed to the upper bracket 22 / lower bracket 23 by the second locking member 29, thereby effectively supporting and protecting the battery cell 24.

[0048] The cover 11 is provided with a power supply interface 113 for power supply. This power supply interface 113 is connected to the conductive connector 211 on the circuit board 21, thereby realizing the power supply connection between the lithium battery and external devices. In order to improve the heat dissipation performance of the lithium battery, several heat dissipation holes 124 communicating with the groove 122 are also opened on the outer side of the base 12. These heat dissipation holes 124 can effectively dissipate the heat generated by the battery pack 2 during operation, ensuring the stable operation of the lithium battery.

[0049] Compared to traditional technologies, this solution allows for the detachable installation of the battery pack 2 inside the outer casing 1, enabling users to easily replace the battery pack without the need for specialized tools or complex operations, significantly improving convenience and efficiency. Furthermore, users have two options when needing to replace the battery: one is to replace the entire battery pack 2, a simple and quick method suitable for cases of overall battery pack aging or damage; the other is to retain the external structure of the battery pack 2 and only replace the internal battery cells 24, a more economical and environmentally friendly method suitable for scenarios where the battery cells are aging but the external structure remains intact. The coexistence of these two replacement methods greatly enhances user flexibility and convenience.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lithium battery with a detachable and replaceable battery pack, comprising a casing and a battery pack body, wherein the battery pack body is detachably installed inside the casing, characterized in that: The outer casing consists of a cover and a base. The base has a limiting groove, and the bottom of the limiting groove has a recess for placing and fixing the battery pack. An annular block is installed in the limiting groove, and the inner side of the annular block protrudes towards the center of the recess to fix the battery pack. The cover is detachably installed on the base and completely covers the battery pack. The battery pack consists of a circuit board, an upper bracket, a lower bracket, and multiple battery cells. The upper and lower brackets are arranged in parallel and closely attached to the inner wall of the groove. The battery cells are placed between the upper and lower brackets and clamped and fixed. The top of the upper bracket is provided with an upper nickel strip that is welded and fixed to one end of the positive electrode of all the battery cells. The bottom of the lower bracket is provided with a lower nickel strip that is welded and fixed to one end of the negative electrode of all the battery cells. The circuit board is installed on one side of the upper and lower brackets and is simultaneously connected to the upper and lower nickel strips for conductivity. The circuit board is provided with pluggable conductive connectors.

2. The lithium battery with a detachable and replaceable battery pack according to claim 1, characterized in that: The base has several L-shaped locking holes distributed around the periphery of the limiting groove. One end of each locking hole is connected to the top of the base, and the other end is connected to the outside of the base. The side of the cover that connects to the base has several barbs that are inserted into the locking holes for locking. Each barb corresponds to a locking hole.

3. A lithium battery with a detachable and replaceable battery pack according to claim 2, characterized in that: The cover has a protrusion at one end near the base, which is embedded in the limiting groove to press the annular block.

4. A lithium battery with a detachable and replaceable battery pack according to claim 1, characterized in that: The cover is provided with a power supply interface for power supply, and the power supply interface is connected to a conductive connector.

5. A lithium battery with a detachable and replaceable battery pack according to claim 1, characterized in that: The upper bracket has several upper slots for inserting battery cells at its bottom and several upper openings at its top that communicate with the bottom of the upper slots. The upper nickel bar is placed in the upper openings. The lower bracket has several lower slots for inserting battery cells at its top and several lower openings at its bottom that communicate with the bottom of the lower slots. The lower nickel bar is placed in the lower openings.

6. A lithium battery with a detachable and replaceable battery pack according to claim 1, characterized in that: One end of both the upper and lower brackets is provided with a recess for embedding and mounting a circuit board, and the four corners of the circuit board are locked and fixed to the upper / lower brackets by a first locking member.

7. A lithium battery with a detachable and replaceable battery pack according to claim 1, characterized in that: A number of support rods distributed around the battery cell are connected between the upper bracket and the lower bracket. The two ends of the support rods are locked and fixed to the upper bracket / lower bracket by a second locking member.

8. A lithium battery with a removable and replaceable battery pack according to any one of claims 1-7, characterized in that: The outer side of the base has several heat dissipation holes that communicate with the groove.

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