A solderless testable single cell

Abstract

This invention proposes a solderless test-type single-cell battery, relating to the field of battery technology. It includes a cell body, terminals, and a locking structure. The terminals include a fixed part and a movable part. The fixed part is fixed to the cell body, and the movable part is adjustablely mounted on the fixed part, forming an adjustable gap space. The locking structure is used to lock the movable part and the fixed part together. The movable part has two working states: the first state is that the movable part and the fixed part are in close contact, forming a complete conductive terminal; the second state is that a gap space is formed between them to hold the test aluminum bar. This single-cell battery enables rapid switching between normal use and testing states: in normal use, the locking structure fixes the movable part and the fixed part together, forming a complete terminal to ensure conductivity; during testing, the gap space, in conjunction with the locking structure, holds the aluminum bar to achieve a solderless connection, avoiding damage to the cell, improving testing efficiency, and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a solderless testable single cell. Background Technology

[0002] During the research and development testing of power batteries and customer sampling, battery cells typically require performance verification through electrical connections. Currently, the industry generally uses two connection methods: one is to send dedicated testing fixtures with the battery cells, which not only increases logistics and management costs but also results in poor fixture versatility, making it difficult to meet the testing needs of different customers; the other is to use laser-welded metal connecting pieces, which, although reliable, is difficult to disassemble without damage after welding, often leading to the direct scrapping of battery cells after testing due to damage to the terminals.

[0003] This traditional testing method has significant drawbacks: First, the laser welding process is irreversible, meaning the battery cell cannot be reused after testing, resulting in resource waste. Second, each test requires re-welding, which is cumbersome and inefficient. Third, the welding process may affect the battery cell's terminal structure and even the accuracy of the test data. Especially in R&D verification and small-batch testing scenarios, frequent welding and disassembly severely restrict testing efficiency and increase R&D costs. Utility Model Content

[0004] In view of this, this utility model proposes a solderless testable single cell, which solves the problems of non-reusable cells, low testing efficiency and resource waste caused by the reliance on soldering or special tooling in traditional testing methods.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a solderless testable single-cell battery, comprising:

[0007] Battery cell body;

[0008] The electrode post includes a fixed part and a movable part. The fixed part is fixedly disposed on the cell body, and the movable part is adjustablely mounted on the fixed part, so that an adjustable gap space is formed between the fixed part and the movable part.

[0009] A locking structure is used to lock the moving part onto the fixed part;

[0010] The movable part has a first working state and a second working state relative to the fixed part:

[0011] The first working state is configured such that the moving part and the fixed part are in close contact to form a complete conductive electrode post;

[0012] The second working state is configured such that a gap space for clamping the test aluminum bar is formed between the moving part and the fixed part, and the test aluminum bar can be fixed in the gap space by the locking structure.

[0013] Based on the above technical solution, preferably, the locking structure includes a locking bolt, the movable part has a through hole for the locking bolt to pass through, and the fixed part has a threaded hole that mates with the locking bolt.

[0014] Based on the above technical solution, preferably, the length of the threaded section of the locking bolt that mates with the threaded hole is greater than the thickness of the test aluminum bar.

[0015] Based on the above technical solution, preferably, the side face of the movable part away from the fixed part is provided with a countersunk hole. The countersunk hole is coaxially arranged with the through hole and the hole diameter is larger than that of the through hole, which is used to accommodate the cap of the locking bolt.

[0016] Based on the above technical solution, preferably, the locking structure further includes a positioning structure, the positioning structure comprising:

[0017] At least one positioning protrusion is provided on the end face of the movable part facing the fixed part;

[0018] The corresponding positioning groove is provided on the end face of the fixed part facing the movable part;

[0019] When the movable part and the fixed part are engaged, the positioning protrusion and the positioning groove fit together to restrict the circumferential rotation of the movable part relative to the fixed part.

[0020] Based on the above technical solution, preferably, there are two positioning grooves, which are symmetrically arranged on both sides of the fixing part along the length of the battery cell body, and the distance between the two positioning grooves is greater than or equal to the width of the aluminum bar.

[0021] Based on the above technical solution, preferably, the positioning protrusion is a positioning post, and the positioning groove and positioning hole are also mentioned.

[0022] Based on the above technical solution, preferably, the length of the positioning post is greater than the thickness of the test aluminum bar.

[0023] Based on the above technical solution, preferably, the positioning protrusion is a buckle, the positioning groove is a slot that cooperates with the buckle, and the slot is located on the side wall of the fixing part.

[0024] The present invention has the following advantages over the prior art:

[0025] (1) Through the coordinated design of the adjustable electrode post and locking structure, the battery cell can be quickly switched between normal use and testing states: In normal use, the moving part and the fixed part are in close contact to form a complete conductive electrode post, ensuring stable conductivity; during testing, the test aluminum bar is clamped by adjusting the gap space formed, achieving a reliable connection without welding. This solution effectively solves three major problems of traditional testing methods: First, it avoids the battery cell damage and scrapping caused by welding, making the battery cell reusable; second, it simplifies the testing connection process and significantly improves testing efficiency; third, the modular design reduces the dependence on special testing fixtures, thereby significantly reducing testing costs while ensuring connection reliability, and has the comprehensive advantages of simple structure, convenient operation, and strong compatibility.

[0026] (2) The design of detachable connection between the locking bolt and the movable and fixed parts enables the cell to switch quickly between normal use and test states: In normal use, the locking bolt tightly fixes the movable and fixed parts to form a complete conductive electrode post; in test, the tightness of the bolt is adjusted to form a gap space that can accommodate the test aluminum bar, and the bolt clamping force is used to achieve a reliable connection of the aluminum bar without welding, which not only ensures the stability of the test connection, but also avoids the cell damage caused by traditional welding methods, making the cell reusable, while significantly improving test efficiency and reducing test costs.

[0027] (3) By setting two positioning grooves, two positioning protrusions are set accordingly. In this way, when the moving part and the fixed part are fixedly connected by locking bolts, the positioning protrusions and positioning grooves cooperate to prevent the moving part from rotating horizontally relative to the fixed part, ensuring the stability of the pole structure. During the test, the test aluminum bar is located between the two positioning protrusions, which can limit the angle of horizontal rotation of the test aluminum bar, so that the length direction of the test aluminum bar is basically perpendicular to the length direction of the cell body. This allows the test aluminum bar to be adjusted within a small angle range within the space defined by the two positioning protrusions, which is convenient for installation and alignment during the test operation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a single battery cell without aluminum foil as disclosed in this utility model;

[0030] Figure 2This is a schematic diagram of the structure of a single battery cell assembled with an aluminum bar, as disclosed in this utility model.

[0031] Figure 3 This is a schematic diagram of the planar structure of a single battery cell disclosed in this utility model;

[0032] Figure 4 This is one structural method of the positioning structure disclosed in this utility model;

[0033] Figure label:

[0034] 1. Battery cell body; 2. Terminal post; 21. Fixing part; 22. Moving part; 221. Through hole; 211. Threaded hole; 222. Countersunk hole; 3. Locking structure; 31. Locking bolt; 32. Positioning structure; 321. Positioning protrusion; 322. Positioning groove; 321a. Positioning post; 322a. Positioning hole; 321b. Snap-fit; 322b. Slot; P. Aluminum bar; P1. Mounting hole Detailed Implementation

[0035] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0036] like Figure 1 As shown, combined with Figure 2-4 This utility model discloses a solderless test-type single cell, including a cell body 1, a terminal post 2 and a locking structure 3.

[0037] Among them, the cell body 1 is the basic structure of a single cell, including a housing, a core package disposed in the housing, and a cover plate installed on the housing. The cell body 1 provides a mounting base for the terminal post 2, ensuring that the cell can work stably during testing or normal use. Specifically, the terminal post 2 is installed on the cover plate. The structure of the entire cell body 1 is the existing technology.

[0038] The electrode post 2 includes a fixed part 21 and a movable part 22. The fixed part 21 is fixedly disposed on the battery cell body 1 and is used to fix and connect to the electrode tab of the battery cell body 1. It serves as the base part of the conductive electrode post 2 and ensures a stable connection between the battery cell and the external circuit.

[0039] The movable part 22 is adjustablely mounted on the fixed part 21, and an adjustable gap space is formed by changing its relative position to the fixed part 21. The fixed part 21 provides a stable electrical connection, ensuring the conductivity of the battery cell during normal use. The adjustable design of the movable part 22 allows the battery cell to switch between test mode and normal use mode, improving flexibility. In this embodiment, both the movable part 22 and the fixed part 21 are made of metal, such as copper or aluminum.

[0040] The locking structure 3 is used to apply a fastening force between the movable part 22 and the fixed part 21 to ensure a stable connection between the two under different working conditions.

[0041] The movable part 22 has a first working state and a second working state relative to the fixed part 21:

[0042] The first working state is configured such that the movable part 22 and the fixed part 21 are in close contact to form a complete conductive electrode post 2, which enables the cell to charge and discharge normally, ensures the stable operation of the cell in the battery pack, and avoids problems such as increased resistance or heat generation caused by poor connection. The structure is simple and reliable, and is suitable for mass production and use.

[0043] The second working configuration is as follows: a gap space is formed between the movable part 22 and the fixed part 21 for clamping the test aluminum bar P. The locking structure 3 can fix the test aluminum bar P within this gap space, achieving solder-free testing and avoiding the cell scrapping problem caused by laser welding. After testing, the aluminum bar P can be easily disassembled, and the cell can be reused, reducing testing costs. It is suitable for laboratory, R&D testing, or customer sample delivery scenarios, improving testing efficiency.

[0044] The adjustable electrode post 2 and locking structure 3 work together to achieve rapid switching between normal use and testing states for the battery cell. In normal use, the movable part 22 and the fixed part 21 are in close contact to form a complete conductive electrode post 2, ensuring stable conductivity. During testing, the gap space is adjusted to clamp the test aluminum bar P, achieving a reliable connection without soldering. This solution effectively solves three major problems associated with traditional testing methods: first, it avoids battery cell damage and scrapping caused by soldering, making the battery cell reusable; second, it simplifies the testing connection process, significantly improving testing efficiency; and third, the modular design reduces reliance on dedicated testing fixtures, thereby significantly reducing testing costs while ensuring connection reliability. It boasts comprehensive advantages of simple structure, convenient operation, and strong compatibility.

[0045] As some embodiments, the locking structure 3 includes a locking bolt 31, a through hole 221 for the locking bolt 31 to pass through on the movable part 22, and a threaded hole 211 for cooperating with the locking bolt 31 on the fixed part 21.

[0046] When the battery cell is in normal use, the screw part of the locking bolt 31 passes through the through hole 221 and is threadedly connected to the threaded hole 211 on the fixed part 21, so that the movable part 22 and the fixed part 21 are tightly fixed together, and the movable part 22 and the fixed part 21 form a complete pole post 2, so that it can be used for charging and discharging in the battery module.

[0047] When the battery cell needs to be tested, loosen the locking bolt 31 to create a gap between the movable part 22 and the fixed part 21. Insert the test aluminum bar P between the movable part 22 and the fixed part 21, and then screw the locking bolt 31 through the through hole 221, the mounting hole P1 on the test aluminum bar P, and the threaded hole 211 to connect them. This will create a clamping force between the movable part 22 and the fixed part 21 on the test aluminum bar P, making it easier to test. After the test is completed, loosen the locking bolt 31 to facilitate the disassembly of the test aluminum bar P.

[0048] In some embodiments, the length of the threaded section of the locking bolt 31 that mates with the threaded hole 211 is greater than the thickness of the test aluminum bar P. This arrangement ensures that after passing through the test aluminum bar P, the threaded section of the locking bolt 31 still has a portion that mates with the threaded hole 211. This allows the threaded section of the locking bolt 31 to effectively engage with the threaded hole 211 after passing through the movable part 22 and the test aluminum bar P, thereby effectively clamping the test aluminum bar P between the movable part 22 and the fixed part 21.

[0049] As one embodiment, the movable part 22 has a countersunk hole 222 on the side of the fixed part 21 away from the movable part 22. The countersunk hole 222 is coaxially arranged with the through hole 221 and the hole diameter is larger than that of the through hole 221, and is used to accommodate the cap of the locking bolt 31.

[0050] The countersunk hole 222 adopts a stepped hole structure. The upper enlarged section matches the shape of the bolt cap, while the lower part remains coaxial with the through hole 221, forming a complete bolt installation channel. After the locking bolt 31 locks the movable part 22 and the fixed part 21 together, the cap of the locking bolt 31 is hidden in the countersunk hole 222, making the top surface of the pole post 2 a flat structure. This facilitates electrical connection between the top surfaces of the pole posts 2 through the busbar during normal use and assembly of the battery cells, avoiding any protrusions that could affect the assembly of the busbar.

[0051] In this embodiment, the shape of the entire pole post 2 can be cylindrical or square, and the locking bolt 31 is located at the central axis of the pole post 2.

[0052] After the locking bolt 31 fixes the movable part 22 and the fixed part 21, the movable part 22 and the fixed part 21 are positioned in the axial direction. However, there is a risk that the movable part 22 and the fixed part 21 may rotate horizontally, which may cause structural instability during normal use of the battery cell.

[0053] Therefore, the following technical solution is also adopted in this embodiment.

[0054] The locking structure 3 in this embodiment also includes a positioning structure 32, which includes a positioning protrusion 321 and a positioning groove 322.

[0055] At least one positioning protrusion 321 is provided on the end face of the movable part 22 facing the fixed part 21, and the corresponding positioning groove 322 is provided on the end face of the fixed part 21 facing the movable part 22.

[0056] When the movable part 22 engages with the fixed part 21, the positioning protrusion 321 and the positioning groove 322 fit together to restrict the movable part 22 from rotating circumferentially relative to the fixed part 21.

[0057] In this embodiment, there are two positioning grooves 322, which are symmetrically arranged on both sides of the fixing part 21 along the length direction of the battery cell body 1. The distance between the two positioning grooves 322 is greater than or equal to the width dimension of the aluminum bar P.

[0058] With this configuration, two positioning grooves 322 are correspondingly provided with two positioning protrusions 321. In this way, when the movable part 22 and the fixed part 21 are fixedly connected by the locking bolt 31, the positioning protrusions 321 and the positioning grooves 322 cooperate to prevent the movable part 22 from rotating horizontally relative to the fixed part 21, thus ensuring the structural stability of the pole post 2. During the test, the test aluminum bar P is located between the two positioning protrusions 321, which can limit the angle of horizontal rotation of the test aluminum bar P, so that the length direction of the test aluminum bar P is basically perpendicular to the length direction of the cell body 1. This allows the test aluminum bar P to be adjusted within a small angle range within the space defined by the two positioning protrusions 321, which is convenient for installation and alignment during the test operation.

[0059] In one embodiment, the positioning protrusion 321 is a positioning post 321a, a positioning groove 322, and a positioning hole 322a. After the movable part 22 and the fixed part 21 are locked together, the positioning post 321a is inserted into the positioning hole 322a to prevent the movable part 22 from rotating horizontally relative to the fixed part 21.

[0060] It is worth noting that the length of the positioning post 321a is greater than the thickness of the test aluminum bar P. In this way, when the test aluminum bar P is located between the movable part 22 and the fixed part 21, and the locking bolt 31 presses the test aluminum bar P between the movable part 22 and the fixed part 21, the end of the positioning post 321a can still be inserted into the positioning hole 322a. This can prevent the movable part 22 from rotating relative to the fixed part 21, and at the same time limit the horizontal swing of the test aluminum bar P.

[0061] In some other embodiments, the positioning protrusion 321 is a snap-fit ​​321b, and the positioning groove 322 is a slot 322b that mates with the snap-fit ​​321b, with the slot 322b located on the side wall of the fixed part 21. This configuration ensures that when the individual battery cell is being charged and discharged normally, the movable part 22 and the fixed part 21 are tightly connected to ensure structural stability. The snap-fit ​​321b on the movable part 22 and the slot 322b on the fixed part 21 engage, initially fixing the movable part 22 and the fixed part 21 in the axial direction. Simultaneously, they do not rotate circumferentially in the horizontal direction. The locking bolt 31 then securely and reliably connects them, ensuring that the movable part 22 and the fixed part 21 do not detach during subsequent use, thus achieving a reliable electrical connection of the electrode post 2.

[0062] It is worth noting that when the test aluminum bar P is located between the movable part 22 and the fixed part 21, the buckle 321b cannot be connected to the slot 322b. However, the lower part of the buckle 321b will be inserted into the slot 322b, which can limit the horizontal rotation of the movable part 22 relative to the fixed part 21 to a certain extent. At the same time, it can also limit the rotation of the test aluminum bar P, which can ensure a reliable mechanical connection between the test aluminum bar P and the pole 2 and ensure that the test is carried out normally.

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solderless test-type single-cell battery, characterized in that, include: Battery cell body (1); The pole (2) includes a fixed part (21) and a movable part (22). The fixed part (21) is fixedly disposed on the cell body (1), and the movable part (22) is adjustablely mounted on the fixed part (21), so that an adjustable gap space is formed between the fixed part (21) and the movable part (22). The locking structure (3) is used to lock the movable part (22) onto the fixed part (21); The movable part (22) has a first working state and a second working state relative to the fixed part (21): The first working state is configured such that the movable part (22) and the fixed part (21) are in close contact to form a complete conductive electrode post (2); The second working state is configured such that a gap space for clamping the test aluminum bar (P) is formed between the movable part (22) and the fixed part (21), and the test aluminum bar (P) can be fixed in the gap space by the locking structure (3).

2. The solderless test-type single cell as described in claim 1, characterized in that: The locking structure (3) includes a locking bolt (31), the movable part (22) has a through hole (221) for the locking bolt (31) to pass through, and the fixed part (21) has a threaded hole (211) that mates with the locking bolt (31).

3. The solderless testable single cell as described in claim 2, characterized in that: The length of the threaded section of the locking bolt (31) that mates with the threaded hole (211) is greater than the thickness of the test aluminum bar (P).

4. The solderless testable single cell as described in claim 2, characterized in that: The movable part (22) has a countersunk hole (222) on the side face away from the fixed part (21). The countersunk hole (222) is coaxially arranged with the through hole (221) and the hole diameter is larger than that of the through hole (221) to accommodate the cap of the locking bolt (31).

5. The solderless testable single cell as described in claim 2, characterized in that: The locking structure (3) further includes a positioning structure (32), the positioning structure (32) comprising: At least one positioning protrusion (321) is provided on the end face of the movable part (22) facing the fixed part (21); The corresponding positioning groove (322) is provided on the end face of the fixed part (21) facing the movable part (22); When the movable part (22) engages with the fixed part (21), the positioning protrusion (321) and the positioning groove (322) fit together to restrict the movable part (22) from rotating circumferentially relative to the fixed part (21).

6. The solderless testable single cell as described in claim 5, characterized in that: There are two positioning grooves (322), which are symmetrically arranged on both sides of the fixing part (21) along the length direction of the battery cell body (1). The distance between the two positioning grooves (322) is greater than or equal to the width of the aluminum bar (P).

7. The solderless testable single cell as described in claim 5, characterized in that: The positioning protrusion (321) is a positioning post (321a), and the positioning groove (322) and positioning hole (322a) are also mentioned.

8. The solderless testable single cell as described in claim 7, characterized in that: The length of the positioning post (321a) is greater than the thickness of the test aluminum bar (P).

9. The solderless testable single cell as described in claim 5, characterized in that: The positioning protrusion (321) is a buckle (321b), and the positioning groove (322) is a slot (322b) that cooperates with the buckle (321b), and the slot (322b) is located on the side wall of the fixing part (21).

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