High-conductivity connector for connection of battery cell and pole
Through the design of the conductive connecting tube and probe structure, the welding inconsistency and disassembly problems of the square aluminum shell battery cell pole connection are solved, and efficient and stable battery cell connection is achieved, which adapts to vibration scenarios, reduces costs and supports the cascade utilization of battery modules.
Patent Information
- Application Number
- CN202422643046.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The existing square aluminum shell battery cell pole connection has problems such as welding inconsistency that is difficult to detect, high risk of cold welding, complex operation, high cost, difficulty in disassembly and replacement, and high disassembly safety risks.
It adopts a conductive connecting tube and probe structure, realizes pole connection by injecting conductive silver paste, and uses an adjustable probe and elastic structure to ensure stable contact, avoid welding, and support disassembly and replacement.
It simplifies integration operations, improves production efficiency, reduces costs, ensures connection stability, adapts to vibration scenarios, supports the recycling of battery modules, and avoids safety risks.
Smart Images
Figure CN223451125U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery module technical field, especially a high conductivity connector for connecting the pole of battery cell. BACKGROUND
[0002] Square aluminum shell batteries are combined together in series or in parallel in specific use, series connection can improve the voltage of the battery system, thereby increasing the energy density of the battery, parallel connection can increase the current output capacity of the battery system, thereby improving the power density of the battery, series and parallel connection helps to form an efficient battery module. In this process, the connection mode and connection structure design between each battery cell are related to the stability and efficiency of the whole battery system.
[0003] In the prior art, square aluminum shell battery cells are usually placed vertically, and the poles of multiple battery cells are located at the top, the small face of the battery cell is attached to the cooling plate, and the connection between the poles of each battery cell is generally achieved by special metal connecting pieces through pressing, ultrasonic welding, laser welding and other methods. This connection is stable and reliable, which helps to ensure the conductivity and mechanical strength of the connection. However, this connection mode has the following defects: (1) It is not easy to control the consistency of welding, and the area not welded is not easy to detect, and there is a risk of virtual welding. (2) Frequent welding operations result in complex integrated process, complex process, low production efficiency, high integrated cost. (3) In subsequent use, the places with unfirm welding may crack due to external forces such as vibration in use scenarios, resulting in interruption of connection. (4) After welding, the battery cells are fixed into groups and cannot be disassembled and replaced, and only the entire module can be replaced or scrapped, which is difficult to meet the battery module gradient utilization requirements. (5) When the battery pack is retired and disassembled, the manual disassembly efficiency is not high, and improper operation may cause short circuit, leakage and other safety problems, resulting in loss and safety problems.
[0004] Therefore, the present application is proposed. UTILITY MODEL CONTENTS
[0005] In view of the above-mentioned defects of the prior art, the utility model provides a high-conductivity connector for connecting the pole of a battery cell.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme comprising:
[0007] A high-conductivity connector for connecting the pole of a battery cell comprises a conductive connecting pipe and two conductive probes. The connecting pipe is a hollow structure, and a grouting hole for injecting conductive silver paste into the connecting pipe is arranged on the connecting pipe. A plugging screw is arranged on the grouting hole. The two probes are arranged on the connecting pipe along the same straight line in opposite directions with adjustable distance or are arranged on the connecting pipe along two parallel straight lines in the same direction with adjustable height respectively.
[0008] Preferably, the probe comprises a probe body and a probe mounting sleeve, one end of the probe body is fixedly connected with the probe mounting sleeve, and a plurality of uniformly distributed contact teeth are arranged on the end face of the other end of the probe body, the probe mounting sleeve is a hollow structure and the inner diameter thereof matches the outer diameter of the connecting pipe, the contact teeth are selected from one of a rectangular tooth, a spherical tooth, a conical tooth, a wavy tooth and a saw-shaped tooth, and the top of the contact tooth is lower than the end face.
[0009] Further preferably, the probe body and the probe mounting sleeve are welded, riveted or integrally formed, and the probe body is integrally formed with the contact teeth.
[0010] Preferably, the middle part of the connecting pipe is fixed with a limiting piece I, one probe is fixedly connected with the left end of the connecting pipe through a probe mounting sleeve, and the other probe is slidably connected with the right end of the connecting pipe through a probe mounting sleeve, and a spring I is sleeved on the connecting pipe between the probe mounting sleeve and the limiting piece I.
[0011] Preferably, the middle part of the connecting pipe is fixed with a limiting piece II, and the two probes are slidably connected with the two ends of the connecting pipe through respective probe mounting sleeves, and a spring II is sleeved on the connecting pipe between the probe mounting sleeve and the limiting piece II.
[0012] Further preferably, the limiting piece I or the limiting piece II is selected from one of a limiting ring, a clamping spring, a limiting pin and a limiting bolt.
[0013] Preferably, the utility model further comprises two connecting rods, the two connecting rods are respectively and perpendicularly fixedly connected with the two ends of the connecting pipe, a limiting piece III is arranged on the connecting rod, the probe is slidably connected with the free end of the connecting rod through a probe mounting sleeve, a spring III is sleeved on the part of the connecting rod between the limiting piece III and the probe mounting sleeve, and the connecting rod and the connecting pipe are of the same outer diameter and are both hollow structures.
[0014] Further preferably, the limiting piece III is selected from one of a limiting ring, a clamping spring, a limiting pin and a limiting bolt, and a grouting hole for injecting conductive silver paste into the connecting rod is arranged on the connecting rod.
[0015] More preferably, the distance between the two probes is at most 15 mm, the contact resistance of the contact teeth is less than 10 mΩ, and the elastic force of the spring I, the spring II or the spring III is greater than 300 Kg.
[0016] Most preferably, the grouting hole has a diameter of not more than 2 mm.
[0017] Compared with the prior art, the utility model has at least the following beneficial effects:
[0018] 1. The utility model has simple structure, scientific design and strong conductivity, realizes conduction by contacting the pole when used, is free of welding, simplifies integrated operation, improves production efficiency, reduces integrated cost, and avoids problems such as virtual welding and inconsistent welding.
[0019] 2、The connector has elasticity, can adapt to a certain vibration force, and will not loosen or break even if the use scene appears vibration and external force connection, stable and reliable;
[0020] 3、The connection can be disassembled and replaced at any time, which helps to meet the requirements of battery module gradient utilization;
[0021] 4、When the battery pack is retired and disassembled, the artificial disassembly is efficient, and safety problems such as short circuit and liquid leakage are not easy to occur. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0023] Figure 1 It is a structural schematic view of embodiment 1 of the present application.
[0024] Figure 2 It is a structural schematic view of embodiment 2 of the present application.
[0025] Figure 3 It is a structural schematic view of embodiment 3 of the present application.
[0026] Figure 4 It is Figure 1 It is a three-dimensional structural schematic view of the probe body.
[0027] Figure 5 It is the positional relationship of two square aluminum shell battery cells in embodiment 1.
[0028] Figure 6 It is the positional relationship of two square aluminum shell battery cells in embodiment 3.
[0029] In the figure: 1, connecting pipe; 11, grouting hole; 2, probe; 21, probe body; 211, contact tooth; 22, probe mounting sleeve; 3, limiting piece I; 4, spring I; 5, limiting piece II; 6, spring II; 7, connecting rod; 71, grouting hole; 8, limiting piece III; 9, spring III. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.
[0031] The structures not described in detail in the following embodiments are all prior art, and the directional words such as "left end" and "right end" used to clearly describe the component structure are only used to describe their relative position relationship and are not used to limit the scope of protection of the present invention. The "sliding connection" and "fixed connection" used to clearly describe the connection relationship between the component structures are all based on prior art and conventional technical means in this field, and are not improvements of this application.
[0032] Example 1
[0033] like Figure 1 As shown: The utility model discloses a high-conductivity connector for connecting battery cell poles, comprising: a conductive connecting tube 1 and two conductive probes 2;
[0034] A limiting member I3 is fixed in the middle of the connecting pipe 1, and the limiting member I3 is specifically a limiting ring. A grouting hole 11 with a diameter of 2 mm is set on the connecting pipe 1;
[0035] The probe 2 includes a probe body 21 and a probe mounting sleeve 22. One end of the probe body 21 is fixedly connected to the probe mounting sleeve 22, and a plurality of evenly distributed contact teeth 211 are provided on the end surface of the other end. The probe mounting sleeve 22 is a hollow structure and its inner diameter matches the outer diameter of the connecting pipe 1. The contact teeth 211 are triangular pyramid teeth (the specific structure is as shown in FIG. Figure 4 As shown), the top of the contact tooth 211 is lower than the end surface, the probe body 21 and the probe mounting sleeve 22 are welded, and the probe body 21 and the contact tooth 211 are integrally formed;
[0036] One probe 2 is fixedly connected to the left end of the connecting pipe 1 through the probe mounting sleeve 22, and the other probe 2 is slidably connected to the right end of the connecting pipe 1 through the probe mounting sleeve 22. A spring Ⅰ4 is provided on the connecting pipe 1 between the probe mounting sleeve 22 and the limiter Ⅰ3; after assembly is completed, conductive silver paste is injected into it through the grouting hole 11, and then the grouting hole 11 is sealed with a sealing screw.
[0037] In this embodiment, the high-conductivity connector can be used to connect two square aluminum shell battery cells with opposite poles. For example, two square aluminum shell battery cells are fixedly placed on a battery cell placement rack, with the large surfaces of the two battery cells facing downward so that the two poles are located on the sides of the battery cells, and the two poles are arranged relative to each other and the distance between them is relatively fixed (the specific position relationship is as follows: Figure 5As shown in the figure), the utility model is pressed from between two electric cores to make one probe 2 contact with the pole of one square aluminum shell electric core, and the other probe 2 contact with the pole of the other square aluminum shell electric core, because the top of the contact tooth 211 is lower than the end face of the probe body 21, that is, the end face of the probe body 21 forms a space for wrapping the pole of the electric core, so that the probe body 21 forms a clamping position to the pole after contact, so that the electrically conductive connection between the poles of the two square aluminum shell electric cores is realized. In specific use, in order to further improve the stability of the utility model connection, preferably, the corresponding limiting mechanism is arranged on the electric core placing rack, such as a partition plate for separating two electric cores is arranged on the electric core placing rack, and a limiting hole for limiting the movement of the connecting pipe 1 is arranged on the partition plate, and the purpose of ensuring stable connection is achieved by limiting the movement of the connecting pipe 1. Of course, this specific structure is only an example, and those skilled in the art can flexibly design and use according to the specific structure of the electric core placing rack in specific practice, and this part is not the improvement of the utility model, so it will not be repeated and limited.
[0038] Example 2
[0039] As Figure 2 shown: the utility model discloses a high conductive connector for electric core pole connection, which comprises: electrically conductive connecting pipe 1 and two electrically conductive probes 2;
[0040] The connecting pipe 1 is a hollow structure, and a grouting hole 11 for injecting conductive silver paste into it is arranged thereon, and the hole diameter of the grouting hole 11 is 1.5 mm;The probe 2 comprises an integrally formed probe body 21 and a probe mounting sleeve 22, one end of the probe body 21 is fixedly connected with the probe mounting sleeve 22, and a plurality of uniformly distributed contact teeth 211 are arranged on the end face of the other end, the probe mounting sleeve 22 is a hollow structure and the inner diameter matches the outer diameter of the connecting pipe 1, the contact tooth 211 is a spherical tooth, the top of the contact tooth 211 is lower than the end face, and the probe body 21 is integrally formed with the contact tooth 211;
[0041] The middle part of the connecting pipe 1 is fixedly provided with a limiting piece II 5, and the two probes 2 are slidably connected with the two ends of the connecting pipe 1 through the respective probe mounting sleeves 22, and a spring II 6 is sleeved on the connecting pipe 1 between the probe mounting sleeve 22 and the limiting piece II 5;After assembly, conductive silver paste is injected into the connecting pipe 1 through the grouting hole 11, and then the grouting hole 11 is plugged with a plugging screw.
[0042] This embodiment is based on example 1, and the two probes 2 are designed as telescopic structure, which further expands the product flexibility range and applicability, and the use method and matters needing attention are the same as example 1.
[0043] Example 3
[0044] As Figure 3The utility model discloses a high conductivity connector for connecting the pole of the battery cell, which comprises a conductive connecting pipe 1, two conductive probes 2 and two connecting rods 7.
[0045] The connecting pipe 1 is of a hollow structure, and a grouting hole 11 with a diameter of 2 mm is arranged on the connecting pipe 1; the probe 2 comprises a probe body 21 and a probe mounting sleeve 22, one end of the probe body 21 is fixedly connected with the probe mounting sleeve 22, a plurality of evenly distributed contact teeth 211 are arranged on the end face of the other end of the probe body 21, the probe mounting sleeve 22 is of a hollow structure and the inner diameter of the probe mounting sleeve 22 matches the outer diameter of the connecting pipe 1, the contact teeth 211 are saw-shaped teeth, the top of the contact teeth 211 is lower than the end face, the probe body 21 and the probe mounting sleeve 22 are welded, and the probe body 21 is integrally formed with the contact teeth 211;
[0046] The two connecting rods 7 are respectively perpendicular to the two ends of the connecting pipe 1 and are welded to the two ends of the connecting pipe 1, a limiting part III 8 is arranged on the connecting rod 7, the probe 2 is slidably connected with the free end of the connecting rod 7 through the probe mounting sleeve 22, a spring III 9 is arranged on the part of the connecting rod 7 between the limiting part III 8 and the probe mounting sleeve 22, the connecting rod 7 has the same outer diameter as the connecting pipe 1 and is also of a hollow structure, a grouting hole 71 for injecting conductive silver paste into the connecting rod 7 is arranged on the connecting rod 7, and the grouting hole 71 has a diameter of 2 mm;
[0047] After assembly, the conductive silver paste is injected into the connecting pipe 1 through the grouting hole 11, the conductive silver paste is injected into the connecting rod 7 through the grouting hole 71, and then each is blocked.
[0048] In the embodiment, the high conductivity connector can be used to connect two square aluminum shell battery cells which are adjacent to each other in front and back. For example, the two square aluminum shell battery cells are fixedly placed on a battery cell placing rack, the large faces of the two battery cells face downward so that the two pole columns are located on the side faces of the battery cells, and the two pole columns are adjacent to each other in front and back and have a relatively determined distance (the positional relationship is specifically as shown in the figure). Figure 6The utility model discloses from the electric core placing frame and the clearance of two electric cores press in make one probe 2 and one square aluminum shell electric core's pole contact, another probe 2 and another square aluminum shell electric core's pole contact, because the top of contact tooth 211 is lower than the end surface of probe body 21, therefore forms the clamping of pole after contact probe body 21, so realizes the electrically conductive connection between two square aluminum shell electric core poles. In specific use, in order to further improve the stability of the utility model connection, preferably set up corresponding limiting mechanism on the electric core placing frame, such as setting up a baffle on the electric core placing frame, set up the limiting slot for limiting the movement of connecting pipe 1, the connecting pipe 1 of the utility model is just clamped into the limiting slot after moving to the target position, so through the movement of connecting rod 1 reaches the purpose of ensuring stable connection. Of course, this specific structure is only an example, and the person skilled in the art can flexibly design and use according to the specific structure of the electric core placing frame in specific practice, and this part is not the improvement of the utility model, so it is not repeated and not limited.
[0049] It should be noted that:
[0050] (1) in the above 3 embodiments, connecting pipe 1, probe 2, connecting rod 7 are all copper, and gold-plated copper is particularly good.
[0051] (2) in the above 3 embodiments, spring I 4, spring II 6, spring III 9 are all stainless steel springs with a spring force greater than 300 Kg.
[0052] (3) in the above 3 embodiments, the distance between the two probes 2 is at most 15 mm, and the contact resistance of the contact tooth is less than 10 mΩ.
[0053] (4) the degree of invagination of contact tooth 211 should not be too small or too large, if the degree of invagination is too large, it will lead to unstable contact between contact tooth 211 and the pole or even unable to contact, which is not conducive to the stability of the connection, and if the degree of invagination is too small, the clamping effect of probe body 21 on the pole is not obvious, and the connection will be loose when there is vibration in the use scene.
[0054] (5) inject silver paste into connecting pipe 1 and connecting rod 7, which can enhance its conductivity, on the other hand, in order to fill the hollow position of connecting pipe 1 or connecting rod 7 caused by the inconsistent compression amount of the spring, ensure the stability and reliability of the electrical connection, and further enhance the mechanical strength of the connection to prevent connection failure caused by vibration or impact.
[0055] In summary: the utility model is especially suitable for the connection between the electrode posts of square aluminum shell battery cell when the battery cell is grouped, its structure is simple, scientific design, low cost, can realize the reliable, stable connection between the electrode posts without welding, avoids the problems of traditional welding such as consistency not easy to control, virtual welding, complex operation, low production efficiency, high integrated cost etc., can also adapt to the use scene with vibration, can also meet the requirement of battery module gradient utilization, is convenient to disassemble and is not easy to appear safety problem.
[0056] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and deform the above-mentioned embodiments within the scope of the utility model. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without mutual contradiction.
Claims
1. A high-conductivity connector for connecting battery cell poles, characterized in that: include: A conductive connecting pipe (1) and two conductive probes (2); the connecting pipe (1) is a hollow structure, provided with a grouting hole (11) for injecting conductive silver paste into the connecting pipe (1); the grouting hole (11) is provided with a blocking screw; the two probes (2) are arranged on the connecting pipe (1) in opposite directions along the same straight line and with an adjustable relative distance, or are arranged on the connecting pipe (1) in the same direction along two parallel straight lines and with their respective heights adjustable.
2. The high-conductivity connector for connecting battery cell poles according to claim 1, characterized in that: The probe (2) comprises a probe body (21) and a probe mounting sleeve (22); one end of the probe body (21) is fixedly connected to the probe mounting sleeve (22); a plurality of evenly distributed contact teeth (211) are provided on the end surface of the other end; the probe mounting sleeve (22) is a hollow structure and its inner diameter matches the outer diameter of the connecting pipe (1); the contact teeth (211) are selected from one of rectangular teeth, spherical teeth, conical teeth, wavy teeth, and saw-shaped teeth; and the top of the contact teeth (211) is lower than the end surface.
3. The high-conductivity connector for connecting battery cell poles according to claim 2, characterized in that: The probe body (21) and the probe mounting sleeve (22) are welded, riveted or integrally formed, and the probe body (21) and the contact teeth (211) are integrally formed.
4. The high-conductivity connector for connecting battery cell poles according to claim 2, characterized in that: A limiting member I (3) is fixed in the middle of the connecting pipe (1), one probe (2) is fixedly connected to the left end of the connecting pipe (1) through a probe mounting sleeve (22), and the other probe (2) is slidably connected to the right end of the connecting pipe (1) through the probe mounting sleeve (22), and a spring I (4) is sleeved on the connecting pipe (1) between the probe mounting sleeve (22) and the limiting member I (3).
5. The high-conductivity connector for connecting battery cell poles according to claim 2, characterized in that: A limiting member II (5) is fixed in the middle of the connecting pipe (1), and the two probes (2) are slidably connected to both ends of the connecting pipe (1) through their respective probe mounting sleeves (22). A spring II (6) is sleeved on the connecting pipe (1) between the probe mounting sleeve (22) and the limiting member II (5).
6. The high-conductivity connector for connecting battery cell poles according to claim 4 or 5, characterized in that: The limiting member I (3) or the limiting member II (5) is selected from one of a limiting ring, a retaining ring, a limiting pin, and a limiting bolt.
7. The high-conductivity connector for connecting battery cell poles according to claim 2, characterized in that: The invention also includes two connecting rods (7), which are respectively perpendicularly and fixedly connected to the two ends of the connecting pipe (1). A limit piece III (8) is provided on the connecting rod (7). The probe (2) is slidably connected to the free end of the connecting rod (7) through a probe mounting sleeve (22). A spring III (9) is provided on the portion of the connecting rod (7) located between the limit piece III (8) and the probe mounting sleeve (22). The connecting rod (7) and the connecting pipe (1) have the same outer diameter and are both hollow structures.
8. The high-conductivity connector for connecting battery cell poles according to claim 7, characterized in that: The limiting member III (8) is selected from one of a limiting ring, a retaining spring, a limiting pin, and a limiting bolt. The connecting rod (7) is provided with a grouting hole for injecting conductive silver paste into the connecting rod (7).
9. The high-conductivity connector for connecting battery cell poles according to any one of claims 4, 5, 7, and 8, characterized in that: The maximum distance between the two probes (2) is 15 mm, the contact resistance of the contact teeth (211) is less than 10 mΩ, and the elastic force of the spring I (4), spring II (6) or spring III (9) is greater than 300 kg.
10. The high-conductivity connector for connecting battery cell poles according to claim 9, characterized in that: The diameter of the grouting hole (11) does not exceed 2 mm.