CN215266591U

CN215266591U - Wiring terminal of battery module

Info

Publication number: CN215266591U
Application number: CN202120553923.5U
Authority: CN
Inventors: 曾志坚; 吴国标; 陈旭明
Original assignee: Shunke Zhilian Technology Co ltd
Current assignee: Shunke Zhilian Technology Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-12-21
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses a connecting terminal of a battery module, which comprises a copper bar, a protective sleeve and a connector, wherein the connector is accommodated in an accommodating cavity of the protective sleeve, the protective sleeve is provided with an installation opening communicated with the accommodating cavity, and the protective sleeve is also provided with a wiring opening communicated with the accommodating cavity and arranged opposite to the installation opening, so that a plug can pass through the wiring opening to be plugged into the connector; the copper bar is provided with a convex ring, the convex ring is matched with the mounting opening and sleeved in the mounting opening, and the sleeving ring of the connector is fixedly sleeved on the inner wall of the convex ring in an interference fit manner. The connector is of an integrated structure and is composed of at least two elastic strip pieces, the at least two elastic strip pieces are distributed in a circumferential array mode to enable the connector to form a circular ring structure, fixed ends of the adjacent elastic strip pieces are fixedly connected with each other to form the sleeving ring, and one end, far away from the fixed end, of each elastic strip piece is a free end. The connector has a simple structure, so that the manufacturing difficulty and the manufacturing cost of the wiring terminal of the battery module are reduced.

Description

Wiring terminal of battery module

Technical Field

The utility model relates to a battery module technical field especially relates to binding post of battery module.

Background

The traditional connecting terminal of the battery module of the electric automobile generally adopts a bolt locking mode, namely a bolt locking mode is adopted between a copper bar of the connecting terminal of the battery module and a connector of the connecting terminal, so that the locking is time-consuming and is not beneficial to installation and disassembly; in addition, because electric automobile is in the motion state for a long time, and the battery module often is in among the adverse circumstances, long-term vibration and corruption lead to the bolt to have higher not hard up risk.

Therefore, with the advent of RADSOK technology (RADSOK terminal technology), an innovative technology of nafamon, the problem of bolt loosening is solved. Namely, the connector is tightly clamped with the copper bar to replace the locking of a bolt. When the RADSOK connector is used, the two RADSOK connectors are connected to the positive electrode and the negative electrode of the battery module respectively, and the circuit can be connected and disconnected in a plug and connector plugging mode.

However, the RADSOK connector has a complicated overall structure and complicated structures of parts, which results in high cost for manufacturing the RADSOK connector, and thus also results in high cost of the terminal provided with the RADSOK connector.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a connecting terminal of a battery module, which has a simpler connector structure, thereby reducing the manufacturing difficulty and the manufacturing cost of the connector; in addition, the assembly mode of the wiring terminal of the battery module is simple and convenient, the stability is high, the actual requirement is met, quick installation can be realized, the integration difficulty is reduced, the production benefit is improved, and the product cost is further reduced.

The purpose of the utility model is realized by adopting the following technical scheme:

the connecting terminal of the battery module comprises a copper bar, a protective sleeve and a connector, wherein the connector is accommodated in an accommodating cavity of the protective sleeve, the protective sleeve is provided with an installation opening communicated with the accommodating cavity, and the protective sleeve is also provided with a wiring opening which is communicated with the accommodating cavity and is opposite to the installation opening, so that a plug can pass through the wiring opening to be plugged into the connector; the copper bar is provided with a convex ring, the convex ring is matched with the mounting opening and is sleeved in the mounting opening, and the sleeving ring of the connector is fixedly sleeved and in interference fit with the inner wall of the convex ring;

the connector is of an integrated structure and is composed of at least two elastic strip pieces, the at least two elastic strip pieces are distributed in a circumferential array mode, so that the connector forms a circular ring structure, fixed ends of the adjacent elastic strip pieces are fixedly connected with each other to form the sleeving ring, and one end, far away from the fixed end, of each elastic strip piece is a free end.

Further, the maximum static friction force between the ferrule of the connector and the inner wall of the male ring is not less than 2000N.

Furthermore, a wave section is arranged between the free end and the fixed end of the elastic strip piece, the inner diameter enclosed by each wave section is smaller than the inner diameter enclosed by each free end, and the wave section is used for elastically clamping the plug.

Further, the connector is formed by adopting a stamping process.

Furthermore, the protective sleeve is provided with a limiting ring, the wiring opening is formed in the limiting ring, and the inner diameter of the limiting ring is smaller than the inner diameter formed by the free ends in a surrounding mode.

Furthermore, the protective sleeve is provided with at least one buckle at the periphery of the mounting opening, and the copper bar is clamped with the buckle so that the convex ring is limited in the mounting opening.

Furthermore, the protective sleeve is provided with a positioning column at the periphery of the mounting opening, the copper bar is provided with a positioning groove, and the positioning column is spliced with the positioning groove.

Further, the buckle is equipped with two, two the buckle distributes symmetrically in the relative both sides of reference column.

Furthermore, the surface of the copper bar is provided with a plating layer, the inner surface and the outer surface of the convex ring are both plated with silver, and the rest parts are plated with silver or nickel.

Furthermore, the protective sheath adopts the plastic material to make.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. because the connector is in a circular ring structure and consists of at least two elastic strip-shaped sheets and is in an integrated structure (namely a part), the connector is simple in structure and allows the connector to be formed by adopting a stamping process. Compared with a complex RADSOK technology, the RADSOK technology has a complex structure and can only be formed by injection molding, and the connector reduces the processing cost.

2. In addition, the convex ring of the copper bar is sleeved with the mounting opening of the protective sleeve to ensure the stability of the copper bar; the sleeving ring of the connector is fixedly sleeved with the inner wall of the convex ring in an interference fit mode, so that the connector and the copper bar are reliably fixed, the resistance of the joint of the connector and the copper bar is reduced, and the phenomenon that the resistance of the joint of the connector and the copper bar is too large to cause excessive heating is avoided, and the product requirement is met.

3. Because the gap must exist between the inner wall of the cover of connector ring and bulge loop, therefore the area of the contact surface that actual contact point constitutes must be less than the inner curved surface wall area of bulge loop, through setting up the bulge loop at the copper bar, and carry out the large tracts of land contact through bulge loop and cover ring, can overcompensate the value that leads to both area of contact to reduce because of the machining precision is not enough, thereby reduce the resistance value of connector and copper bar junction by a wide margin, in order to improve its overcurrent capacity, and reduce calorific capacity, improve the product security performance.

4. The bulge loop of copper bar still is used for the installation open-ended cooperation with the protective sheath to accomplish the equipment of the binding post of battery module, a thing is multi-purpose promptly, and makes the integrated degree of difficulty of product lower, thereby improves the productivity effect, further reduces product cost.

Drawings

Fig. 1 is a schematic structural view of a connection terminal of a battery module according to the present invention, which is in an exploded state for easy understanding;

fig. 2 is a schematic structural view of a connection terminal of the battery module shown in fig. 1, in which it is in an assembled state;

FIG. 3 is a schematic view of the connector shown in FIG. 1;

FIG. 4 is a schematic view of the protective sheath of FIG. 1;

fig. 5 is another perspective view of the protective sheath of fig. 4.

In the figure: 1. copper bars; 11. a convex ring; 12. positioning a groove; 2. a protective sleeve; 21. an accommodating chamber; 22. an installation opening; 23. a wiring opening; 24. a limiting ring; 25. buckling; 26. a positioning column; 3. a connector; 31. a sleeving connection ring; 32. an elastic strip piece; 321. a fixed end; 322. a free end; 323. a wave segment.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used herein, "vertical," "horizontal," "left," "right," and similar expressions are for purposes of illustration only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, a terminal of a battery module according to a preferred embodiment of the present invention includes a copper bar 1, a protective cover 2, and a connector 3. The connector 3 is accommodated in the accommodating cavity 21 of the protective sleeve 2, the protective sleeve 2 is made of plastic materials to serve as an insulator and protect the connector 3, and it can be understood that the protective sleeve 2 is made of insulating materials. The protective cover 2 is opened with a mounting opening 22 communicating with the accommodating chamber 21, and the protective cover 2 is also opened with a wiring opening 23 (see fig. 5) communicating with the accommodating chamber 21 and disposed opposite to the mounting opening 22 so that a plug can be inserted into the connector 3 through the wiring opening 23. Copper bar 1 has bulge loop 11, and bulge loop 11 and mounting opening 22 adaptation cup joint in mounting opening 22 to accomplish the location of copper bar 1 and protective sheath 2 and tentatively fix. The fixed cup joint of the inner wall of the bell and spigot ring 31 and the bulge loop 11 of the connector 3 and interference fit to realize the conductive connection and the locking connection between the connector 3 and the copper bar 1, so, realize the fixation between the connector 3 and the copper bar 1 through the friction force, and do not need to adopt the bolt fastening mode.

The connector 3 is of unitary construction (i.e., is a single piece) to facilitate manufacture of the connector 3. The connector 3 is composed of at least two elastic strip-shaped sheets 32, the at least two elastic strip-shaped sheets 32 are distributed in a circumferential array manner, so that the connector 3 forms a circular ring structure, fixed ends 321 of adjacent elastic strip-shaped sheets 32 are fixedly connected with each other to form the splicing ring 31, one end of each elastic strip-shaped sheet 32, which is far away from the fixed end 321, is a free end 322, so that the free end 322 can be elastically expanded and contracted, and when a plug is plugged into the connector 3, the free end 322 is expanded and elastically compresses the plug; the free end 322 contracts by its own spring force when the plug is pulled out of the connector 3.

It can be understood that, during the use, can install this binding post respectively on the positive pole of electric automobile's battery module, the plug can with the mode realization of inserting detachably of connector 3 free end 322 through pulling out.

It should be noted that, since the connector 3 is in a circular ring structure and is composed of at least two elastic strip-shaped pieces 32, and is in an integrated structure (i.e. one part), the structure is simple, and the connector is allowed to be formed by a stamping process. Compared with a complex RADSOK technology, the RADSOK technology has a complex structure and can only be formed by injection molding, and the connector 3 reduces the processing cost. In addition, the convex ring 11 of the copper bar 1 is sleeved with the mounting opening 22 of the protective sleeve 2 to ensure the stability of the copper bar 1; the sleeving ring 31 of the connector 3 is fixedly sleeved with the inner wall of the convex ring 11 in an interference fit mode, so that the connector 3 and the copper bar 1 are reliably fixed, the resistance of the joint of the connector and the copper bar is reduced, and the phenomenon that the resistance of the joint of the connector and the copper bar is too large to cause excessive heating is avoided, and the product requirements are met. It should be explained here that, because there is the gap necessarily between the inner wall of the socket ring 31 of the connector 3 and the bulge loop 11, therefore the area of the contact surface that the actual contact point constitutes is inevitably less than the inner curved surface wall area of the bulge loop 11, through set up the bulge loop 11 at the copper bar 1, and carry out the large tracts of land contact with the socket ring 31 through the bulge loop 11, can overcompensate the value that leads to both contact areas to reduce because of the machining precision is not enough, thereby reduce the resistance value of the connector 3 and the junction of the copper bar 1 by a wide margin, in order to improve its overcurrent ability, and reduce calorific capacity, improve the product safety performance. Further, the bulge loop 11 of copper bar 1 still is used for the cooperation with the installation opening 22 of protective sheath 2 to accomplish the equipment of the binding post of battery module, a thing is multi-purpose promptly, and makes the integrated degree of difficulty of product lower, thereby improves the productivity effect, further reduces product cost.

Preferably, in order to ensure that the connector 3 and the copper bar 1 are reliably fixed, so as to meet the requirement that the electric vehicle vibrates for a long time and the joint of the connector 3 and the copper bar 1 is not loosened, the maximum static friction force between the socket ring 31 of the connector 3 and the inner wall of the convex ring 11 is not less than 2000N.

Preferably, referring to fig. 3, a wave section 323 is arranged between the free end 322 and the fixed end 321 of the elastic strip piece 32, the inner diameter enclosed by each wave section 323 is smaller than the inner diameter enclosed by each free end 322, and the wave section 323 is used for elastically clamping the plug; this arrangement allows the resilient strip 32 to be reliably pressed against the plug. In addition, since the respective free ends 322 enclose a trumpet shape at this time, accurate insertion of the plug into the connector 3 is facilitated.

Preferably, referring to fig. 5, the protective casing 2 is provided with a limiting ring 24, the wiring opening 23 is provided on the limiting ring 24, and the inner diameter of the limiting ring 24 is smaller than the inner diameter enclosed by the free ends 322, so as to prevent the plug from dragging the connector 3 to be pulled out along the wiring opening 23.

Preferably, referring to fig. 1 or 4, the protective casing 2 is provided with at least one buckle 25 at the periphery of the mounting opening 22, and the copper bar 1 is clamped with the buckle 25, so that the convex ring 11 is limited in the mounting opening 22. It can be understood that, on the premise that the convex ring 11 of the copper bar 1 is matched with the mounting opening 22 of the protective sleeve 2, the convex ring 11 of the copper bar 1 is limited in the mounting opening 22 along the axial direction of the convex ring 11 through the buckle 25, and the fixation between the convex ring 11 and the mounting opening 22 can be completely completed. Moreover, the fixing mode is simple and convenient, the assembling difficulty is reduced, and the production benefit is further improved.

Preferably, in order to further improve the connection stability between the protective sleeve 2 and the copper bar 1, the protective sleeve 2 is provided with a positioning column 26 at the periphery of the mounting opening 22, the copper bar 1 is provided with a positioning groove 12, and the positioning column 26 is inserted into the positioning groove 12.

Wherein, for compromise installation intensity and connection stability, buckle 25 is equipped with two, and two buckles 25 distribute at the relative both sides of reference column 26 symmetrically.

Preferably, in order to avoid the oxidation of the copper bar 1, the surface of the copper bar 1 is provided with a plating layer, the inner surface and the outer surface of the convex ring 11 are both silver-plated to further reduce the resistance value, and the rest parts are silver-plated or nickel-plated.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. Binding post of battery module, its characterized in that: the copper bar connector comprises a copper bar (1), a protective sleeve (2) and a connector (3), wherein the connector (3) is accommodated in an accommodating cavity (21) of the protective sleeve (2), the protective sleeve (2) is provided with an installation opening (22) communicated with the accommodating cavity (21), the protective sleeve (2) is further provided with a wiring opening (23) communicated with the accommodating cavity (21) and arranged opposite to the installation opening (22), so that a plug can penetrate through the wiring opening (23) to be plugged into the connector (3); the copper bar (1) is provided with a convex ring (11), the convex ring (11) is matched with the mounting opening (22) and is sleeved in the mounting opening (22), and a sleeve ring (31) of the connector (3) is fixedly sleeved on the inner wall of the convex ring (11) and is in interference fit with the inner wall of the convex ring;

connector (3) is integrated structure, connector (3) comprise two at least elasticity strip (32), and two at least elasticity strip (32) circumference array distribute, so that connector (3) form the ring structure, and stiff end (321) mutual fixed connection of adjacent elasticity strip (32) is in order to form cup joint ring (31), and the one end of keeping away from self stiff end (321) on elasticity strip (32) is free end (322).

2. The connection terminal of a battery module according to claim 1, wherein: the maximum static friction force between the socket ring (31) of the connector (3) and the inner wall of the convex ring (11) is not less than 2000N.

3. The connection terminal of a battery module according to claim 1, wherein: wave sections (323) are arranged between the free ends (322) and the fixed ends (321) of the elastic strip-shaped sheets (32), the inner diameter enclosed by the wave sections (323) is smaller than the inner diameter enclosed by the free ends (322), and the wave sections (323) are used for elastically clamping the plug.

4. The connection terminal of a battery module according to claim 1, wherein: the connector (3) is formed by adopting a stamping process.

5. The connection terminal of a battery module according to claim 1, wherein: the protective sleeve (2) is provided with a limiting ring (24), the wiring opening (23) is formed in the limiting ring (24), and the inner diameter of the limiting ring (24) is smaller than the inner diameter formed by the surrounding of the free ends (322).

6. The connection terminal of a battery module according to claim 1, wherein: protective sheath (2) are in the periphery of installing opening (22) is equipped with at least one buckle (25), copper bar (1) with buckle (25) joint, so that bulge loop (11) are restricted in installing opening (22).

7. The connection terminal of a battery module according to claim 6, wherein: protective sheath (2) are in the periphery of installing opening (22) is equipped with reference column (26), copper bar (1) is equipped with constant head tank (12), reference column (26) with constant head tank (12) are pegged graft.

8. The connection terminal of a battery module according to claim 7, wherein: the number of the buckles (25) is two, and the two buckles (25) are symmetrically distributed on two opposite sides of the positioning column (26).

9. The connection terminal of a battery module according to claim 1, wherein: the surface of the copper bar (1) is provided with a plating layer, the inner surface and the outer surface of the convex ring (11) are both plated with silver, and the rest parts are plated with silver or nickel.

10. The connection terminal of a battery module according to claim 1, wherein: the protective sleeve (2) is made of plastic materials.