CN212659641U

CN212659641U - Lead-out frame and battery module

Info

Publication number: CN212659641U
Application number: CN202021521542.0U
Authority: CN
Inventors: 吴婷婷; 冯俊敏; 张万财
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-03-05
Anticipated expiration: 2030-07-28

Abstract

A lead-out frame and a battery module belong to the field of batteries. The leading-out frame comprises a frame body, a connecting body and a stopping body. The frame body is provided with a body part and a protruding part connected to the body part, and the body part is provided with an accommodating cavity. The connecting body is fixedly combined with the accommodating cavity; the stopper body is connected to the body and forms a slot with the body. The lead-out frame can be firmly connected with an end plate in the battery module.

Description

Lead-out frame and battery module

Technical Field

The application relates to the field of batteries, in particular to a lead-out frame and a battery module.

Background

In the battery module, a plurality of batteries connected in series or in parallel are integrally formed by fixing end plates and other structures, and electric energy is led out through output seats connected with a positive electrode and a negative electrode. In general, the output seat is fixed to the end plate, and therefore, the firmness of the connection between the output seat and the end plate needs to be focused.

SUMMERY OF THE UTILITY MODEL

For the stability problem of improving, even solving battery module, this application has proposed frame and battery module of drawing forth.

The application is realized as follows:

in a first aspect, examples of the present application provide a lead frame for connection with an end plate in a battery module.

The leading-out frame comprises a frame body, a connecting body and a stopping body.

The shelf body is provided with a body part and a protruding part connected to the body part, and the body part is provided with an accommodating cavity. The connecting body is fixedly combined with the accommodating cavity; the stopper is connected to the body and forms a catch with the body.

The frame of drawing forth has bulge and draw-in groove to when coordinating with the end plate, the bulge can peg graft in the recess of end plate, and the draw-in groove then can the joint in the plate body, thereby makes to draw forth the frame and can be stable with firmly be connected with the end plate, and also consequently will draw forth the frame from a plurality of directions and spacing in the end plate.

In a first possible embodiment of the first aspect of the present application in combination with the first aspect, the receiving cavity is flared and expands inwardly from the surface of the body portion so as to have a first cavity portion located adjacent to the surface of the body portion and a second cavity portion located within the body portion.

The receiving cavity is sectioned to form at least a portion having a large size and a small size, and the small size portion is located outside and the large size portion is located inside, thereby facilitating stable engagement of the connector with it (preventing the lead-out frame from being easily detached from the end plate).

With reference to the first embodiment of the first aspect, in a second possible implementation manner of the first aspect of the present application, the connecting body includes an expanding section and a contracting section, the expanding section is matched with the second cavity portion, and the contracting section is matched with the first cavity portion.

The connector forms an expansion section and a contraction section in matching with the segmentation and the size design of the accommodating cavity, the expansion section is located in the accommodating cavity, and the contraction section is located outside the accommodating cavity, so that the connector can be prevented from being separated from the accommodating cavity under the action of external force.

With reference to the first aspect, in a third possible embodiment of the first aspect of the present application, the protrusions are prismatic, or the protrusions are cylindrical and the number is at least two.

When the projection is configured in a prismatic manner and is inserted in the end plate, the projection cannot rotate relative to the circumferential direction of the section of the receiving chamber.

When the projection is cylindrical, it can be relatively flexibly and freely inserted into the end plate. When the number of the convex parts is more than two, the convex parts and the end plate can form a plurality of contact matching positions, so that the rotation of the lead-out frame relative to the end plate can be prevented.

With reference to the first aspect or the first to fourth embodiments of the first aspect, in a third possible implementation of the first aspect of the present application, the receiving cavity extends to the protrusion.

The accommodating cavity arranged on the body part of the frame body extends to the protruding part, so that the mass of the leading-out frame can be lightened to a certain extent, and the material consumption is reduced. In addition, the accommodating cavity extends into the protruding part, so that the connecting sheet is conveniently connected with the battery through the leading-out frame, and the over-high requirement on the connection precision can be reduced.

In a fifth possible embodiment of the first aspect of the present application in combination with the first aspect, a closed isolation chamber is provided between the end of the connecting body extending into the receiving chamber and the bottom wall of the receiving chamber.

The isolation chamber prevents the connecting part from directly contacting the end plate when the connecting piece is fixed.

With reference to the first aspect, in a sixth possible implementation manner of the first aspect of the present application, the connecting body has a threaded hole, or the connecting body has a threaded hole communicating with the receiving cavity.

The connecting piece can be connected with the threaded hole of the connecting body through a screw.

With reference to the first aspect or the sixth implementation manner of the first aspect, in a third possible implementation manner of the first aspect of the present application, the lead-out frame includes an ear portion; the ear part is connected with the body part; the ear portion and the body portion together define a securing slot.

The leading-out frame can limit the connecting sheet through the fixing groove, so that the relative stability of the connecting sheet and the end plate is kept when the connecting sheet is connected, and the effective leading-out of the anode and the cathode of the battery monomer is facilitated.

With reference to the first aspect, in an eighth possible implementation manner of the first aspect of the present application, the stopping body is formed by extending from a first end to a second end, the first end of the stopping body is connected to the body, the second end of the stopping body extends away from the body to form a clamping groove, and the second end is rolled back to the first end to form a rolling portion.

The stop body of the lead-out frame forms a rewinding part, so that the connection with the end plate is firmer and more stable.

In a second aspect, examples of the present application provide a battery module. It comprises a battery kit and a lead-out frame. The battery pack has a battery pack and an end plate, and the end plate is provided with a groove and a wall plate, wherein the battery pack has a plurality of battery cells arranged side by side and each battery cell is electrically connected. The leading-out frame is connected with the end plate, the protruding part is embedded into the groove, and the wall plate is inserted into the groove.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural view of a battery module in an example of the present application;

fig. 2 is a schematic view illustrating the structure of an end plate in the battery module of fig. 1;

FIG. 3a shows a schematic view of the mating arrangement of the end plate of FIG. 2 with the lead frame of the present example;

FIG. 3b shows a cross-sectional structural schematic of FIG. 3 a;

FIG. 3c shows an enlarged partial schematic view of section E of FIG. 3 b;

fig. 4 is a schematic structural diagram of an extractor frame in an example of the present application from a first perspective;

fig. 5 is a schematic structural diagram of an extractor frame in an example of the present application from a second viewing angle;

fig. 6 is a schematic cross-sectional structural view of a lead frame in an example of the present application;

fig. 7 shows an exploded view of the exit frame.

Icon: 10-a lead-out frame; 11-a frame body; 110-a body; 111-a projection; 112-a receiving cavity; 12-a linker; 121-a threaded hole; 122-an isolation chamber; 13-a stop body; 131-a rewinding part; 132-a card slot; 14-ear; 140-a fixed slot; 2-a battery module; 20-a battery pack; 201-a battery pack; 2011-cell; 21-an end plate; 211-grooves; 212-wall plate; 22-a conductive member; 23-binding.

Detailed Description

A battery module is generally used for the purpose of collectively using and managing a plurality of battery cells. More electric energy can be provided by the battery module relative to a single battery, and the installation and the fixation are convenient.

Fig. 1 shows a battery module 2 disclosed in an example of the present application.

As shown in fig. 1, the battery module 2 mainly includes a battery pack 20 and a lead frame 10.

The battery pack 20 includes a battery pack 201 and an end plate 21. The battery pack 201 is constituted by a plurality of battery cells 2011. In the example, the battery pack 201 is configured by eight battery cells 2011 arranged side by side (in the direction a), and the battery cells 2011 are connected in series. Two adjacent battery cells 2011 are electrically connected through the conductive member 22. At both end faces of the battery pack 201, one end plate 21 is provided, respectively, and the battery cells 2011 and the end plates 21 connected in series are tightened to be integrated by binding pieces 23 (two hoops in the example).

The end plate 21 is fitted to the battery cell 2011 adjacent thereto in a surface contact manner, and protects the battery cell 2011. The lead frame 10 is attached to the end plate 21 to lead out the positive and negative electrodes of the battery pack 201. End plates 21 provided at both ends of the battery pack 201 in the a direction lead out the positive electrode and the negative electrode through one lead-out frame 10, respectively.

As a structure to be engaged with the lead frame 10, the end plate 21 has a groove body and a plate body (see fig. 2) for limiting the lead frame 10.

In the present example, the end plate 21 has a groove 211 (which may also be a through hole) provided in the C direction to provide a groove body for a protrusion (which will be mentioned later and described in detail) of the lead frame 10 to be inserted.

In the present example, the end plate 21 also has a wall 212 to provide a plate body to be snapped into place by the snap groove 132 (shown in fig. 4) of the lead frame 10. By fitting and matching the concave groove 211 of the end plate 21 and the convex portion of the lead frame 10, the movement of the lead frame 10 in the B direction and the C direction with respect to the end plate 21 can be restricted. The insertion fit of the wall 212 of the end plate 21 and the lead-out frame 10 restricts the movement of the lead-out frame 10 relative to the end plate 21 in the direction a.

The manner of engagement of the end plate 21 and the lead frame 10 in the battery module 2 shown in fig. 1 is disclosed in the drawings as shown in fig. 3a, 3b and 3 c.

Fig. 4 to 7 disclose the structure of the lead frame 10 in the example of the present application.

Referring to fig. 4, the lead-out frame 10 mainly includes a frame body 11, a connecting body 12 and a stopping body 13. The frame 11 constitutes a main body, and the connecting body 12 and the stopping body 13 are respectively attached to the frame 11.

Frame body 11

As shown in fig. 5, the frame 11 includes a body 110 and a protrusion 111 connected to the body 110 (the two may be integrally formed, such as injection molding, compression molding, etc.). The body 110 is a block-shaped structure, and the protrusion 111 is a column-shaped structure extending from a surface (lower surface in fig. 5) of the body 110 to the outside of the body 110.

In some examples, in order to conveniently lead the positive electrode and the negative electrode of the battery out, the lead-out frame 10 may further optionally include an ear portion 14, where the ear portion 14 is used to limit the positive electrode and the negative electrode lead-out conductive structure (such as the aforementioned conductive member 22) of the battery cell 2011. Illustratively, the exit frame 10 has two ear portions 14, and the two ear portions are oppositely connected to the body portion 110 of the frame body 11, so that the ear portions 14 and the surface of the body portion 110 where the receiving cavity 112 is provided define the fixing groove 140. The conductive member 22 may be attached to the surface of the body in a surface contact manner, and further, may be fixedly connected to the connecting body fixed to the body of the frame body in a bolt-fit manner, so as to be confined in the fixing groove 140, as shown in fig. 1.

In fig. 5, the lower surface of the body 110 is depressed to form a platform, and the protrusion 111 is protruded from the surface. In the illustrated example, the projection 111 is implemented in the form of a cylinder. In other examples of the present application, the protrusion 111 may also be selected in the form of a prism, for example, a triangular prism, a quadrangular prism, or the like. The height and shape of the projection 111 are limited by the depth and shape of the recess 211 at the end, both of which are implemented in a structure with a circular cross-section in this application.

When the protrusion 111 has a prism-shaped structure, the groove 211 provided in the end plate 21 is also implemented as a prism-shaped hole, and the matching of the two can limit the rotation of the lead frame 10 relative to the end plate 21. When the projection 111 is cylindrical, the lead frame 10 is provided in plurality to restrict its rotation relative to the end plate 21. For example, the lead frame 10 is provided with two protrusions 111 in the example, and the number of the protrusions 111 may be three, four, or even more in other examples.

As a structure for receiving and fixing the coupling body 12, the body 110 of the frame body 11 has a receiving cavity 112, see fig. 6 and 7. The receiving cavity 112 and the protrusion 111 are located at both ends of the block-shaped body 110, respectively, so as to be substantially opposite in space. That is, the direction in which the connecting body 12 is fitted into the receiving cavity 112 substantially coincides with the extending direction of the projecting portion 111.

Connecting body 12

Referring to fig. 6 and 7, as previously described, the connector 12 is inserted into the cavity 112 and is fixedly connected to the body 110. And as an implementation manner, a connection manner of the connector 12 and the body 110 of the frame 11 may be selected as needed, without particular limitation. In one example, the connecting body 12 can be threadably inserted into the receiving cavity 112 of the body 110. Alternatively, the connecting body 12 can be inserted into the receiving cavity 112 of the body 110 by interference fit. Alternatively, the connector 12 can be adhesively inserted into the receiving cavity 112 of the body 110.

In the present example, connecting body 12 is formed by injection molding in receiving space 112. In order to increase the connection strength between the connector 12 and the body 110 of the frame 11, the space of the receiving cavity 112 varies throughout the depth thereof. For example, receiving cavity 112 is flared and expands inwardly from the surface of body portion 110, and thus, receiving cavity 112 has a first cavity portion (not shown) located adjacent to the surface of body portion 110 and a second cavity portion (not shown) located within body portion 110. Therefore, the area of the cross section of the first cavity portion of the accommodation chamber 112 is larger than the area of the cross section of the second cavity portion. Taking the cylindrical receiving chamber 112 as an example, the receiving chamber 112 is of variable diameter, and its portion at the surface of the frame body 11 is of smaller diameter, while its portion at the inside of the frame body 11 is directly larger.

Accordingly, the structure of the connecting body 12 can be adjusted according to the structure of the receiving cavity 112, for example, the connecting body 12 inserted into the receiving cavity 112 has a structure matched with the receiving cavity. As shown in FIG. 5, connecting body 12 has a generally inverted "T" shaped configuration, as shown in FIG. 7. Because the connecting body 12 has a "big-end-up" configuration, the connecting body 12 is securely "locked" within the receiving cavity 112. Thus, illustratively, the connector body 12 includes an integrally formed expansion section that mates with the second cavity portion and a contraction section that mates with the first cavity portion. Since the connecting body 12 is manufactured in the receiving cavity 112 of the body 110 by injection molding, the surface of the connecting body 12 is in close contact with the inner surface of the body 110 for limiting the receiving cavity 112.

In addition, as an alternative example, the receiving cavity 112 provided at the body portion 110 of the frame body 11 extends to the protrusion 111. Therefore, the protruding portion 111 can be selected to have a hollow pillar structure. In some examples, the protrusion 111 of the holder 11 is integrally formed with the body 110, and thus, it may be considered that the receiving cavity 112 of the holder 11 extends to both the body 110 and the protrusion 111. In other examples, the body 110 and the protrusion 111 of the frame 11 are separately manufactured and connected, and thus, the receiving cavity 112 may be formed by communicating a cavity of the body 110 and a cavity of the protrusion 111.

Further, the accommodating cavity 112 does not penetrate through the protrusion 111, and the connecting body 12 does not interfere with the inner bottom wall of the inner hollow structure of the protrusion 111. Therefore, a closed isolation chamber 122 is provided between the end of the connecting body 12 extending into the receiving chamber 112 and the bottom wall of the receiving chamber 112. The isolation cavity 122 may be filled with an insulating material as needed to avoid potential conduction problems. Alternatively, the isolation chamber 122 may also serve as a buffer space, for example, by providing a screw in the threaded bore 121 of the connector body 12 for connection with a tab, which may be used relatively longer, thereby avoiding the potential risk of damage due to the use of a screw that is too long. Correspondingly, in the above example, the connector 12 may be provided with a threaded hole 121. Alternatively, the threaded hole 121 may extend through the connecting body 12 to communicate with the receiving cavity 112 of the body 110 of the frame 11.

Stop body 13

The stop body 13 is configured to further limit undesired movement of the lead frame 10 relative to the end plate 21. For example, the aforementioned protrusion 111 of the frame body 11 can be moved in the C and B directions as shown in fig. 1. And the stopper 13 can restrict the movement of the lead frame 10 in the a direction with respect to the end plate 21. Thereby, the draw-out frame 10 is restricted from moving relative to the end plate 21 in the aforementioned three directions, so that the mutual stable fitting of the draw-out frame 10 and the end plate 21 is ensured.

In the example, the stop body 13 is configured such that the extension frame 10 cooperates with the end plate 21 in a snap-fit manner. That is, in the lead frame 10 having the stopper 13, the lead frame 10 is connected to the end plate 21 by constructing a snap structure. Referring to fig. 1, 2 and 3a, 3b and 3c, the stopper 13 is connected to the body 110 and forms a slot 132 with the body 110, so that when cooperating with the end plate 21, the plate of the end plate 21 is inserted into the slot 132. Thus, the stopper body 13 and the body portion 110 of the lead frame 10 together define and restrain the plate body.

The stop body 13 may have suitable elasticity, and the width of the locking groove 132 is slightly smaller than the thickness of the plate body of the end plate 21. Therefore, when the plate body of the end plate 21 is clamped into the groove body, the stop body 13 and the body part 110 of the frame body 11 are clamped together to form a firmer limiting effect.

As an alternative, the form of the stop body 13 can also be further adjusted, for example, the stop body 13 is provided with a locking-capable structure. Illustratively, the stopper 13 extends from a first end to a second end, the first end of the stopper 13 is connected to the body 110, and the second end of the stopper 13 extends away from the body 110 to form the engaging groove 132. On the basis of this structure, the second end of the stopper 13 is rolled back toward the first end to form the rolled-back portion 131. The rewinding portion 131 may function to restrict the movement of the drawing frame 10 in the C direction with respect to the end plate 21 to some extent. I.e. when the lead frame 10 is subjected to a force in the direction C, the end plate 21 can be "hooked" by the rewinding portion 131 of the stopper 13.

Based on the above description, the lead frame 10 in the present example is explained in detail. Also, the lead frame 10 is more firmly mounted to the end plate 21 in the battery module 2, thereby effectively improving the safety of the battery pack.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

In addition, in order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described in the above description with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the above detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present application, all the embodiments, implementations, and features of the present application may be combined with each other without contradiction or conflict. In the present application, conventional equipment, devices, components, etc. are either commercially available or self-made in accordance with the present disclosure. In this application, some conventional operations and devices, apparatuses, components are omitted or only briefly described in order to highlight the importance of the present application.

Claims

1. A lead-out frame for being connected with an end plate in a battery module, characterized in that the lead-out frame comprises:

the holder body is provided with a body part and a protruding part connected to the body part, and the body part is provided with an accommodating cavity;

the connecting body is fixedly combined with the accommodating cavity;

and the stop body is connected to the body part and forms a clamping groove with the body part.

2. The exit shelf of claim 1 wherein the receiving cavity is flared and flares inwardly from the surface of the body so as to have a first cavity portion located adjacent the surface of the body and a second cavity portion located within the body.

3. The exit shelf of claim 2 wherein the connector comprises an expanded section that mates with the second cavity portion and a contracted section that mates with the first cavity portion.

4. The exit shelf of claim 1 wherein the projections are prismatic or cylindrical and are at least two in number.

5. The exit shelf of any of claims 1 to 4 wherein the receiving cavity extends to the projection.

6. A lead-out frame as claimed in claim 5, wherein a closed separating chamber is provided between the end of the connecting body extending into the receiving chamber and the bottom wall of the receiving chamber.

7. The exit bracket of claim 1 wherein the connector body has a threaded hole or a threaded hole in communication with the receiving cavity.

8. A lead out frame of claim 1 or 7, wherein the lead out frame includes an ear portion connected to the body portion, the ear portion and the body portion together defining a securing slot.

9. The exit frame of claim 1, wherein the stop body extends from a first end to a second end, the first end of the stop body is connected to the body, the second end of the stop body extends away from the body to form the catch, and the second end is rolled back toward the first end to form the rolled portion.

10. A battery module, comprising:

the battery pack is provided with a battery pack and an end plate, wherein the battery pack is provided with a plurality of battery monomers which are arranged side by side and are electrically connected, and the end plate is provided with a groove and a wall plate;

the exit frame of any of claims 1 to 9;

the lead-out frame is connected to the end plate;

the protruding part of the leading-out frame is embedded into the groove, and the wall plate of the end plate is inserted into the groove.