CN213340634U

CN213340634U - Output pole assembly and battery module

Info

Publication number: CN213340634U
Application number: CN202022093870.1U
Authority: CN
Inventors: 胡磊
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-06-01
Anticipated expiration: 2030-09-22

Abstract

The application discloses output pole subassembly and battery module. The output pole subassembly is used for being connected with the end plate of battery module, includes: an output pole base; the double-thread nut penetrates through the output pole base, a first thread hole is formed in the top of the double-thread nut, the bottom of the double-thread nut penetrates through the bottom end of the output pole base, and external threads are formed in the periphery of at least the bottom of the double-thread nut, so that the output pole base is connected to the end plate through the external threads; and the bolt is arranged in the first threaded hole and is used for fixing the output aluminum bar and/or the copper bar of the battery module on the output pole base. According to the output pole assembly, the output pole base is locked on the end plate through the double-thread nut, so that relative sliding between the output pole base and the end plate is avoided, and abnormal sound is prevented; and the output pole base of this application passes through threaded connection with the end plate, only need on the end plate process the screw hole can, the machining area is few, and enables positive negative pole and uses the same end plate, the assembly of being convenient for, has avoided producing the line supplied materials confusion, causes the misloading.

Description

Output pole assembly and battery module

Technical Field

The utility model relates to a battery manufacturing technology field especially relates to an output pole subassembly and battery module.

Background

When the battery module is assembled, the output electrode of the battery module is fixed with the end plate in a way that the outline groove of the output electrode base is machined on the end plate, the output electrode base is firstly installed in the outline groove of the end plate, and then the end plate and the side plate are welded. Such a fixing method has the following disadvantages:

1) in order to ensure the strength of the end plates, the end plates cannot be made into a symmetrical structure, so that the end plates cannot be simultaneously used for assembling the anode and the cathode of the battery module, two end plates must be designed for the anode and the cathode, the design and production cost is increased, and the materials are easily mixed during assembly, so that misassembly is caused;

2) in order to machine a contour groove on the end plate to fix the output electrode, the end plate needs to be machined in a large area, so that the cost of the end plate is high;

3) after the end plate and the side plate are welded, the output electrode cannot be detached from the end plate, and cannot be replaced after a production line is wrongly installed, so that after-sale maintenance is not facilitated.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an output pole subassembly and battery module.

An output pole assembly for connection with an end plate of a battery module, the output pole assembly comprising:

an output pole base;

the double-thread nut is arranged on the output pole base in a penetrating mode, a first thread hole is formed in the top of the double-thread nut, the bottom of the double-thread nut penetrates through the bottom end of the output pole base, and external threads are formed in the periphery of at least the bottom of the double-thread nut, so that the output pole base is connected to the end plate through the external threads;

and the bolt is arranged in the first threaded hole and is used for fixing the output aluminum bar and/or the copper bar of the battery module on the output pole base.

In an alternative embodiment of the present invention, the output pole assembly further comprises:

and the nut insert is arranged in the first threaded hole, and the bolt can be matched with the nut insert so as to be fixed in the first threaded hole.

The utility model relates to an optional embodiment, the nut mold insert is the copper nut.

The utility model relates to an optional embodiment, the periphery of double thread nut is provided with limit structure, so that double thread nut will the output pole base is spacing on the end plate.

The utility model relates to an optional embodiment, limit structure is for setting up the round flange of double thread nut periphery, the bottom surface of flange with output utmost point base butt.

In an alternative embodiment of the present invention, the double-threaded nut includes a first connecting portion and a second connecting portion disposed below the first connecting portion;

the output electrode base is provided with a through hole, the first connecting part is arranged in the through hole in a penetrating mode, and the limiting structure is arranged on the periphery of the top of the first connecting part;

the first threaded hole extends downwards from the top surface of the first connecting part;

the external thread is arranged on the periphery of the second connecting part.

In an alternative embodiment of the present invention, the double-threaded nut is a hollow structure, and the bottom end thereof is open.

The utility model discloses an optional implementation way in, still include the upper cover, the upper cover lid is located the top of output pole base.

A battery module comprises a battery pack, side plates arranged on two sides of the battery pack along a first direction, end plates arranged on two sides of the battery pack along a second direction, and the output pole assembly arranged on the end plates; and a second threaded hole matched with the outer thread of the double-thread nut is formed in the end plate.

In an alternative embodiment of the present invention, the number of the second threaded holes is two, and the second threaded holes are symmetrically disposed on both sides of the end plate along the first direction.

The utility model discloses an useful part lies in: the output pole base is locked on the end plate through the double-thread nut, so that the relative sliding between the output pole base and the end plate is avoided, and abnormal sound is prevented; the output electrode base is connected with the end plate through threads, only threaded holes are needed to be processed on the end plate, the processing area of the end plate is small, and the cost of the end plate is reduced; the output electrode base is connected with the end plates through threads, so that the end plates can be made into a symmetrical structure, the same end plates can be used for the positive electrode and the negative electrode of the battery module, different end plates are not required to be respectively designed for the positive electrode and the negative electrode, the cost is reduced, and the phenomenon that the incoming materials of a production line are disordered to cause misassembly is avoided; the output pole base is connected with the end plate through the threads, so that the output pole base can be installed on the end plate after the end plate is connected with other parts (such as side plates), the installation difficulty is reduced, the output pole base can be detached from the end plate at any time, the output pole base can be reassembled even if the output pole base is mistakenly installed, and after-sale maintenance is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a battery module according to the present invention;

FIG. 2 is an exploded view of the structure of FIG. 1;

FIG. 3 is a schematic structural diagram of an output electrode assembly according to the present invention;

FIG. 4 is an exploded view of the output electrode assembly of the present invention;

fig. 5 is a schematic structural view of an embodiment of the middle plate of the present invention;

FIG. 6 is a schematic diagram illustrating a further exploded view of the structure of FIG. 4 according to the present invention;

fig. 7 is a schematic sectional view of the assembly of the output pole assembly and the end plate according to the present invention.

In the figure:

100. a battery module;

200. a battery pack;

300. a side plate;

400. an end plate; 410. a second threaded hole;

500. an output pole assembly; 510. an output pole base; 520. a double-threaded nut; 521. a first threaded hole; 522. a nut insert; 523. blocking edges; 524. a first connection portion; 525. a second connecting portion; 530. an upper cover; 540. and (4) bolts.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be understood by those of ordinary skill in the art as the case may be.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The utility model provides a battery module, as shown in fig. 1 and 2, battery module 100 includes group battery 200, curb plate 300, end plate 400 and output utmost point subassembly 500. The battery pack 200 is composed of a plurality of single batteries, and the plurality of single batteries are stacked to form a large battery pack 200, so that the battery module 100 can provide larger kinetic energy. The side plates 300 are disposed at both sides of the battery pack 200 in a first direction, which is a left-right direction shown in fig. 1. The end plates 400 are disposed at both sides of the battery pack 200 in a second direction, which is the front-rear direction shown in fig. 1. The side plates 300 are welded to the end plates 400 during assembly to form a shroud around the battery pack 200. The output electrode assembly 500 is disposed on the end plate 400, and is configured to output electric energy of the battery pack 200, the output aluminum row and/or copper row of the battery pack 200 is fixed on the output electrode assembly 500, the battery pack 200 outputs electric energy through the output aluminum row and copper row, specifically, as shown in fig. 1 and fig. 2, the front end and the rear end of the battery pack 200 are respectively an anode and a cathode of the battery pack 200, the anode and the cathode of the battery pack 200 are respectively provided with the aluminum row and the copper row, the end plate 400 at one end corresponding to the anode is provided with the output electrode assembly 500 to fix the anode aluminum row, the end plate 400 at one end corresponding to the cathode is provided with the output electrode assembly 500 to fix the cathode copper row, and of course, there may be a case where the anode aluminum row and the cathode copper row are fixed on the same output electrode assembly 500, so the output electrode assembly 500 is used to fix the aluminum row and/or the.

Referring to fig. 3 and 4, the output pole assembly 500 includes an output pole base 510, a double-threaded nut 520, an upper cover 530 and a bolt 540. An output pole mount 510 is disposed on the end plate 400, and the output pole mount 510 is secured to the end plate 400 by a double threaded nut 520. As shown in fig. 3, the double-threaded nut 520 is inserted into the output pole base 510, the bottom of the double-threaded nut 520 penetrates through the bottom end of the output pole base 510, and an external thread is provided on the periphery of at least the bottom of the double-threaded nut 520, so that the bottom of the double-threaded nut 520 can be in threaded connection with the end plate 400, and the output pole base 510 is fixed on the end plate 400. As shown in fig. 3, a first threaded hole 521 is formed in the top of the double-threaded nut 520, a bolt 540 is disposed in the first threaded hole 521, and the bolt 540 is used for fixing the output aluminum bars and/or the copper bars of the battery module 100 on the output pole base 510. The upper cover 530 covers the output electrode base 510 and is used for protecting the connection between the output electrode base 510 and the aluminum busbar and the copper busbar, so that stable output of the battery module 100 is ensured.

Referring to fig. 5, the end plate 400 is provided with a second threaded hole 410 for matching with the external thread of the double-threaded nut 520, the output electrode base 510 is locked on the end plate 400 through the double-threaded nut 520, so that relative sliding between the output electrode base 510 and the end plate 400 is avoided, abnormal sound is prevented from being generated, the output electrode base 510 is in threaded connection with the end plate 400, only the second threaded hole 410 needs to be processed on the end plate 400, the processing area of the end plate 400 is small, and the cost of the end plate 400 is reduced.

As shown in fig. 5, two second threaded holes 410 are provided, and referring to fig. 1 and 5, the two second threaded holes 410 are symmetrically disposed on the left and right sides of the end plate 400. As shown in fig. 1, because the positive pole and the negative pole of battery module 100 set up both ends around battery module 100 respectively, and just anodal and negative pole all set up the right side at battery module 100, with the setting of second screw hole 410 symmetry so that end plate 400 can be used for anodal and negative pole simultaneously in the left and right sides of end plate 400, whole battery module 100 only need design an end plate 400 can, need not to design different end plate 400 to anodal and negative pole, the chaotic and wrong dress of coming material on having avoided producing the line.

The utility model discloses pass through threaded connection with output pole base 510 and end plate 400 for output pole base 510 can be installed output pole base 510 to end plate 400 after end plate 400 welds well with curb plate 300 again, has reduced the installation degree of difficulty, and output pole base 510 can be dismantled from end plate 400 at any time, even the dress has been wrong also can be reinstalled, also is favorable to after-sales maintenance.

Referring to fig. 4, 6 and 7, the output pole assembly 500 further includes a nut insert 522, the nut insert 522 is disposed in the first threaded hole 521, an inner wall of the nut insert 522 is provided with an internal thread, and the bolt 540 can cooperate with the nut insert 522 to fix the bolt 540 in the first threaded hole 521, so as to lock the output aluminum bars and the copper bars of the battery module 100 on the output pole base 510. The nut insert 522 is arranged, so that the first threaded hole 521 can be prevented from being directly tapped, the bolt 540 can be locked by the aid of threads on the nut insert 522, and machining difficulty is reduced.

The nut insert 522 can be a copper nut, and has good conductivity and heat dissipation performance. The internal thread on the nut insert 522 is a thread of M6, i.e., a thread diameter of 6 mm.

Referring to fig. 4 and 7, in order to enable the double-threaded nut 520 to lock the output pole base 510 to the end plate 400, the double-threaded nut 520 and the output pole base 510 may be assembled in an interference manner, or a limiting structure may be disposed on the double-threaded nut 520, so that the double-threaded nut 520 can fix the output pole base 510 to the end plate 400 without causing the output pole base 510 to fall off from the double-threaded nut 520. The utility model discloses in, set up limit structure in double thread nut 520's periphery and come the output pole base 510 spacing on end plate 400.

As shown in fig. 4 and 7, the limiting structure is a ring of ribs 523 disposed on the periphery of the double-threaded nut 520, the bottom surfaces of the ribs 523 abut against the output electrode base 510, and when the double-threaded nut 520 is locked to the end plate 400, the ribs 523 can press the output electrode base 510, so that the output electrode base 510 is fixed to the end plate 400.

In one embodiment, as shown in fig. 7, the double-threaded nut 520 has a hollow structure, which is beneficial to weight reduction and material saving, and the bottom end of the double-threaded nut 520 is open, so that the side wall of the portion where the double-threaded nut 520 is connected to the end plate 400 has a certain elastic deformation space, which can be folded toward the center, thereby preventing the double-threaded nut 520 from causing hard extrusion on the end plate 400, and protecting the end plate 400.

In one embodiment, as shown in fig. 7, the double-threaded nut 520 includes upper and lower portions, respectively, a first connection portion 524 and a second connection portion 525 disposed below the first connection portion 524. The second connection portion 525 is for connection with the end plate 400, and the external thread of the double-threaded nut 520 for connection with the end plate 400 is provided at the outer periphery of the second connection portion 525. First connecting portion 524 is used for locking output pole base 510, is provided with the through-hole on the output pole base 510, and first connecting portion 524 wears to establish in this through-hole, and limit structure (flange 523) set up the top periphery at first connecting portion 524, and the periphery of first connecting portion 524 need not to set up the screw thread, can be smooth wall, only need at the surface machining external screw thread of second connecting portion 525 can, can reduce the processingquantity like this, reduce the processing degree of difficulty. During assembly, the double-threaded nut 520 penetrates through the through hole in the output pole base 510 from top to bottom and is then locked on the end plate 400, and it can be understood that the diameter of the second connecting portion 525 is smaller than or equal to the diameter of the first connecting portion 524, so that the double-threaded nut 520 can penetrate through the through hole in the output pole base 510. Please refer to fig. 4 and 7, the first threaded hole 521 of the double-threaded nut 520 for fixing the bolt 540 extends downward from the top surface of the first connecting portion 524, and the first threaded hole 521 does not extend to the second connecting portion 525, but extends within the range of the first connecting portion 524, so as to prevent the strength of the double-threaded nut 520 from being reduced due to the fact that the first threaded hole 521 extends to the second connecting portion 525, the outer wall of the second connecting portion 525 is provided with an external thread, if the inner wall is further provided with an internal thread, the strength of the whole double-threaded nut 520 is affected, and the connection reliability of the assembly body is reduced.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An output pole assembly for connection with an end plate (400) of a battery module, comprising:

an output pole mount (510);

the double-thread nut (520) is arranged on the output pole base (510) in a penetrating mode, a first thread hole (521) is formed in the top of the double-thread nut, the bottom of the double-thread nut penetrates through the bottom end of the output pole base (510), and external threads are formed in the periphery of at least the bottom of the double-thread nut (520) so that the output pole base (510) can be connected to the end plate (400) through the external threads;

and the bolt (540) is arranged in the first threaded hole (521) and is used for fixing the output aluminum bar and/or the copper bar of the battery module on the output pole base (510).

2. The output pole assembly of claim 1, further comprising:

a nut insert (522) disposed in the first threaded hole (521), the bolt (540) being engageable with the nut insert (522) to secure the bolt (540) in the first threaded hole (521).

3. The output pole assembly of claim 2, wherein the nut insert (522) is a copper nut.

4. The output pole assembly of claim 1, wherein the outer circumference of the double-threaded nut (520) is provided with a stop structure such that the double-threaded nut (520) stops the output pole base (510) against the end plate (400).

5. The output pole assembly of claim 4, wherein the limiting structure is a ring of ribs (523) disposed on the outer periphery of the double-threaded nut (520), and the bottom surface of the ribs (523) abuts against the output pole base (510).

6. The output pole assembly of claim 4, wherein the double threaded nut (520) comprises a first connection portion (524) and a second connection portion (525) disposed below the first connection portion (524);

a through hole is formed in the output electrode base (510), the first connecting portion (524) penetrates through the through hole, and the limiting structure is arranged on the periphery of the top of the first connecting portion (524);

the first screw hole (521) extends downward from the top surface of the first connection part (524);

the external thread is arranged on the periphery of the second connecting part (525).

7. An output pole assembly according to any of claims 1 to 6, characterized in that the double threaded nut (520) is a hollow structure, open at its bottom end.

8. The output pole assembly of any of claims 1 to 6, further comprising an upper cover (530), the upper cover (530) being disposed over the output pole base (510).

9. A battery module comprising a battery pack (200), side plates (300) provided on both sides of the battery pack (200) in a first direction, end plates (400) provided on both sides of the battery pack (200) in a second direction, and an output electrode assembly according to any one of claims 1 to 8 provided on the end plates (400); and a second threaded hole (410) matched with the external thread of the double-thread nut (520) is formed in the end plate (400).

10. The battery module according to claim 9, wherein the number of the second screw holes (410) is two, and the two second screw holes (410) are symmetrically disposed at both sides of the end plate (400) in the first direction.