CN215644708U

CN215644708U - Battery pack

Info

Publication number: CN215644708U
Application number: CN202122275072.5U
Authority: CN
Inventors: 孔繁明; 田瑞生; 赵冬
Original assignee: CALB Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-01-25
Anticipated expiration: 2031-09-18

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack, which comprises: a voltage output element; the fixing piece is provided with an accommodating groove, and at least part of the voltage output piece is positioned above the fixing piece; the first connecting piece is arranged in the accommodating groove and provided with a first thread, and the first connecting piece is movably arranged along the extending direction of the accommodating groove and is fixedly arranged relative to the accommodating groove along the direction perpendicular to the extending direction of the accommodating groove; and the second connecting piece is provided with a second thread matched with the first thread, and the second connecting piece penetrates through the voltage output piece and then is connected with the first connecting piece. Because the first connecting piece can be along the movably setting of extending direction of holding tank, if have the space between first connecting piece and the voltage output spare, then the second connecting piece can make first connecting piece move along the direction that is close to the voltage output spare to this guarantees reliably to contact between first connecting piece and the voltage output spare.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

Among the correlation technique, inside a plurality of relays that contain of high voltage Distribution box (BDU, Power Distribution Unit), the inside total high voltage output of battery package passes through the conductive bar and transmits high voltage signal to the relay inside, and the conductive bar passes through bolt and relay and high voltage output fastening connection, realizes high voltage transmission.

However, when the conductive bar is connected with the relay or the output electrode protection support, the problem that the conductive bar and the contact interface cannot be completely attached can occur due to manufacturing errors, so that a large contact resistance exists at the joint, a large amount of heat is generated, and safety risks exist inside the battery pack.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pack, which is used for improving the service performance of the battery pack.

The present invention provides a battery pack including:

a voltage output element;

the fixing piece is provided with an accommodating groove, and at least part of the voltage output piece is positioned above the fixing piece;

the first connecting piece is arranged in the accommodating groove and provided with a first thread, and the first connecting piece is movably arranged along the extending direction of the accommodating groove and is fixedly arranged relative to the accommodating groove along the direction perpendicular to the extending direction of the accommodating groove;

and the second connecting piece is provided with a second thread matched with the first thread, and the second connecting piece penetrates through the voltage output piece and then is connected with the first connecting piece.

The battery pack comprises a voltage output piece, a fixing piece, a first connecting piece and a second connecting piece, wherein the voltage output piece is fixed on the fixing piece through the first connecting piece and the second connecting piece, and the first connecting piece is arranged in the accommodating groove of the fixing piece and can be movably arranged along the extending direction of the accommodating groove, so that after the first connecting piece and the second connecting piece are connected through the first thread and the second thread, if a gap exists between the first connecting piece and the voltage output piece, the second connecting piece can enable the first connecting piece to move along the direction close to the voltage output piece, so that the reliable contact between the first connecting piece and the voltage output piece is ensured, the problem that the first connecting piece and the voltage output piece have large contact resistance and generate large heat is avoided, and the service performance of the battery pack is improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a sectional structure schematic view showing a partial structure of a battery pack according to an exemplary embodiment;

fig. 2 is a partially enlarged structural schematic view illustrating a battery pack according to an exemplary embodiment;

fig. 3 is a partially exploded structural schematic view of a battery pack according to an exemplary embodiment.

The reference numerals are explained below:

1. an external conductive member; 10. a voltage output element; 20. a fixing member; 21. an output electrode protection support; 22. a relay; 23. accommodating grooves; 231. interference ribs; 30. a first connecting member; 31. a first thread; 40. a second connecting member; 41. a second thread.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery pack, referring to fig. 1 to 3, the battery pack including: a voltage output member 10; the fixing piece 20, there are holding grooves 23 on the fixing piece 20, at least part of the voltage output part 10 locates above the fixing piece 20; the first connecting piece 30 is arranged in the accommodating groove 23, the first connecting piece 30 is provided with a first thread 31, and the first connecting piece 30 is movably arranged along the extending direction of the accommodating groove 23 and is fixedly arranged relative to the accommodating groove 23 along the direction perpendicular to the extending direction of the accommodating groove 23; and a second connecting member 40, wherein the second connecting member 40 is provided with a second thread 41 matched with the first thread 31, and the second connecting member 40 is connected with the first connecting member 30 after penetrating through the voltage output member 10.

The battery pack according to one embodiment of the present invention includes a voltage output member 10, a fixing member 20, a first connecting member 30, and a second connecting member 40, wherein the voltage output member 10 is fixed to the fixing member 20 through the first connecting member 30 and the second connecting member 40, and since the first connecting member 30 is disposed in the receiving groove 23 of the fixing member 20 and is movably disposed along the extending direction of the receiving groove 23, after the first connecting member 30 and the second connecting member 40 are connected to each other through the first screw 31 and the second screw 41, if there is a gap between the first connecting member 30 and the voltage output member 10, the second connecting member 40 can move the first connecting member 30 in a direction close to the voltage output member 10, thereby ensuring reliable contact between the first connecting member 30 and the voltage output member 10, and avoiding a problem that the first connecting member 30 and the voltage output member 10 have a large contact resistance and generate a large amount of heat, thereby improving the performance of the battery pack.

It should be noted that, when the voltage output element 10 and the fixing element 20 are mounted, the voltage output element 10 may be placed above the fixing element 20, that is, the voltage output element 10 is located on the plane of the notch of the accommodating groove 23. In actual operation, a gap may occur between the voltage output member 10 and the fixing member 20, and in this embodiment, by enabling the first connecting member 30 to move along the extending direction of the accommodating groove 23, when the first connecting member 30 and the second connecting member 40 are screwed, after the second connecting member 40 and the voltage output member 10 are in contact with each other (either direct contact or indirect contact), the second connecting member 40 drives the first connecting member 30 to move along a direction close to the voltage output member 10, so as to ensure reliable contact between the first connecting member 30 and the voltage output member 10.

The extending direction of the receiving groove 23 is the depth direction of the receiving groove 23, i.e., the extending direction of the opening of the receiving groove 23 toward the bottom wall of the receiving groove 23, and can be further considered as the mounting direction of the first connecting member 30. If the depth direction of the receiving groove 23 is defined as a vertical direction, a direction perpendicular to the extending direction of the receiving groove 23 is a horizontal direction, and thus, the first connecting member 30 can move in the vertical direction, but the first connecting member 30 cannot move in the horizontal direction.

In one embodiment, as shown in fig. 2 and 3, the first threads 31 may be internal threads and the second threads 41 may be external threads. In certain embodiments, it is not excluded that the first thread 31 may be an external thread and the second thread 41 an internal thread.

In one embodiment, a position-limiting portion is disposed in the accommodating groove 23, and the first connecting member 30 is connected to the position-limiting portion; wherein, spacing portion includes arch or spout to can enough guarantee that first connecting piece 30 accurately installs in holding tank 23 for spacing portion sliding connection, can make first connecting piece 30 conveniently slide out holding tank 23 under the effect of second connecting piece 40 again.

The limiting part can be arranged along the extending direction of the side wall of the accommodating groove 23 and penetrates through the side wall of the accommodating groove 23.

In some embodiments, a sliding groove is disposed in the accommodating groove 23, and the first connecting element 30 is disposed in the sliding groove, that is, a sliding block structure adapted to the sliding groove may be disposed on the first connecting element 30. In some embodiments, a protrusion is disposed in the receiving groove 23, and a sliding groove structure adapted to the protrusion may be disposed on the first connecting member 30.

In one embodiment, at least two position-limiting portions are disposed in the accommodating groove 23, and the at least two position-limiting portions are disposed at intervals along a circumferential side wall of the accommodating groove 23.

In one embodiment, the first connecting element 30 is in interference fit with the accommodating groove 23 to prevent the first connecting element 30 from moving relative to the accommodating groove 23 along a direction perpendicular to the extending direction of the accommodating groove 23, so that the second connecting element 40 can be reliably connected with the first connecting element 30 after passing through the voltage output element 10, that is, the interference fit between the first connecting element 30 and the accommodating groove 23 can ensure the effective positioning of the first connecting element 30, but does not affect the movement of the first connecting element 30 along the extending direction of the accommodating groove 23.

It should be noted that the first connecting element 30 can only move along the vertical direction of the accommodating groove 23 inside the accommodating groove 23, and the first connecting element 30 cannot move in the horizontal direction, so that the first connecting element 30 cannot be locked with the second connecting element 40 after moving horizontally and scratch the inside of the accommodating groove 23, which causes the failure of the fixing element 20, and the first connecting element 30 moves along the vertical direction, so that the voltage output element 10 and the first connecting element 30 are tightly fixed, the contact resistance of the connection surfaces of the two is reduced, and the safety risk is avoided.

First connecting piece 30 and holding tank 23 interference fit, first connecting piece 30 are along the unable removal of horizontal direction, and interference fit includes the direct joint of first connecting piece 30 and mounting 20, for example the fixed joint mode of arch and recess.

In one embodiment, an interference rib 231 is disposed on at least one of a groove wall of the receiving groove 23 and an outer surface of the first connecting member 30, and the interference rib 231 is disposed to ensure that the first connecting member 30 cannot move in the horizontal direction but does not affect the movement of the first connecting member 30 in the vertical direction.

In one embodiment, the interference ribs 231 are at least two, so as to ensure a reliable horizontal spacing between the first connector 30 and the receiving groove 23.

In some embodiments, as shown in fig. 3, a plurality of interference ribs 231 are disposed on a groove wall of the receiving groove 23, and the interference ribs 231 are disposed at intervals along a circumferential direction of the receiving groove 23, so as to achieve reliable limiting of the first connecting element 30.

In one embodiment, the first connecting member 30 is square, circular or polygonal, and it is ensured that the first connecting member 30 cannot move in the horizontal direction while ensuring that the first connecting member 30 can move in the vertical direction.

In some embodiments, as shown in fig. 3, the first connecting member 30 is square, and the corners of the first connecting member 30 may have circular arc transitions. The square first connecting piece 30 is arranged in a limiting and anti-twisting mode in the horizontal direction of the first connecting piece 30, the first connecting piece 30 is prevented from deflecting when the second connecting piece 40 is locked to cause damage to an internal structure, and meanwhile locking efficiency and effect are influenced.

In one embodiment, the first connecting member 30 is a nut, and the second connecting member 40 is a bolt, which is not only simple in structure, but also ensures effective connection between the first connecting member 30 and the second connecting member 40, and ensures that the first connecting member 30 moves along the extending direction of the accommodating groove 23.

In one embodiment, the voltage output member 10 is a copper bar or an aluminum bar, so that the total high voltage output terminal inside the battery pack can transmit a high voltage signal to the inside of the relay through the copper bar or the aluminum bar.

In one embodiment, the voltage output member 10 is connected to at least two fixing members 20, so that the voltage output member 10 is stably connected to the fixing members 20 and can effectively transmit a high voltage signal.

In one embodiment, as shown in fig. 1, the fixing member 20 includes at least one of an output pole protection holder 21 and a relay 22, the voltage output member 10 may be fixed to the output pole protection holder 21, and the voltage output member 10 may transmit a high voltage signal to the inside of the relay when fixed to the relay 22.

In one embodiment, as shown in fig. 1, at least two relays 22 may be disposed on the output pole protective support 21, the voltage output member 10 may be respectively fixed to the at least two relays 22 through at least two second connecting members 40, and the second connecting members 40 may be directly connected to the relays 22, that is, the first connecting member 30 as described above may not be disposed inside the relays 22, and in this case, the voltage output member 10 may be fixed to the output pole protective support 21 through the first connecting member 30 and the second connecting member 40. The voltage output member 10 may be connected to an external conductive member 1, such as a copper bar or an aluminum bar, at a position on the output electrode protection support 21, as shown in fig. 1 and 2.

In some embodiments, the voltage output member 10 may also be provided on the relay 22 via the first connection member 30 and the second connection member 40. When one voltage output part 10 is connected with two or more relays 22, two points determine a straight line, and due to certain manufacturing errors, the voltage output part 10, the relays 22 and the output pole protective support 21 cannot be ensured on a horizontal plane, but in the embodiment, the first connecting part 30 and the second connecting part 40 are arranged, so that the first connecting part 30 can be moved to ensure that no large gap exists between the voltage output part 10 and the relays 22 or between the voltage output part 10 and the output pole protective support 21, namely the moving range of the first connecting part 30 can compensate for manufacturing tolerances, so that the voltage output part 10 and the first connecting part 30 are tightly locked, large resistance generated by a contact interface is reduced, and the internal safety risk of the battery pack is reduced.

In one embodiment, output pole protective support 21 may be an injection molded structure, and relay 22 is disposed on output pole protective support 21.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the plurality of batteries may be fixed by end plates and side plates.

The battery pack includes a plurality of batteries and a battery case for holding the plurality of batteries.

It should be noted that, the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module, and at this moment, the battery module can be including the end plate and the curb plate of fixed a plurality of batteries. Or, a plurality of batteries can directly be set up in the box, need not to carry out the group to a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged. The battery core is arranged in the battery shell.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery pack, comprising:

a voltage output member (10);

the fixing piece (20), the fixing piece (20) is provided with a containing groove (23), and at least part of the voltage output piece (10) is positioned above the fixing piece (20);

the first connecting piece (30) is arranged in the accommodating groove (23), the first connecting piece (30) is provided with a first thread (31), the first connecting piece (30) is movably arranged along the extending direction of the accommodating groove (23), and is fixedly arranged relative to the accommodating groove (23) along the direction perpendicular to the extending direction of the accommodating groove (23);

and the second connecting piece (40) is provided with a second thread (41) matched with the first thread (31), and the second connecting piece (40) penetrates through the voltage output piece (10) and then is connected with the first connecting piece (30).

2. The battery pack according to claim 1, wherein a stopper is provided in the receiving groove (23), and the first connecting member (30) is connected to the stopper;

wherein, spacing portion includes arch or spout.

3. Battery pack according to claim 1, characterized in that the first connector (30) is an interference fit with the receiving groove (23) to avoid a movement of the first connector (30) relative to the receiving groove (23) in a direction perpendicular to the extension direction of the receiving groove (23).

4. The battery pack according to claim 3, wherein an interference rib (231) is provided on at least one of a groove wall of the receiving groove (23) and an outer surface of the first connector (30).

5. The battery according to claim 4, characterized in that the interference ribs (231) are at least two.

6. Battery pack according to one of claims 1 to 5, characterized in that the first connection element (30) is a nut and the second connection element (40) is a bolt.

7. The battery pack according to any one of claims 1 to 5, characterized in that the voltage output (10) is a copper or aluminum row.

8. The battery according to any one of claims 1 to 5, characterized in that the voltage output (10) connects at least two of the fixing members (20).

9. The battery pack according to claim 8, wherein the fixing member (20) includes at least one of an output pole protection holder (21) and a relay (22).

10. The battery pack according to claim 1, wherein the battery pack is a battery module or a battery pack.