CN113346197A

CN113346197A - Battery switching structure, connection piece, connection structure and battery module

Info

Publication number: CN113346197A
Application number: CN202110628277.9A
Authority: CN
Inventors: 张万财; 郭敏; 张永炜; 蓝金花; 杨强
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Haichen New Energy Technology Co Ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-09-03

Abstract

The invention is suitable for the technical field of batteries, and provides a battery switching structure, a connecting sheet, a connecting structure and a battery module, wherein the battery switching structure can be fixed on a battery post; if the battery switching structure and the connecting sheet form a battery connecting structure, the battery connecting structure can be used for carrying out required series/parallel connection on a plurality of single batteries to form a battery module. The battery module assembly structure is simple, does not need any welding process, has low production equipment cost and high production efficiency, is convenient to disassemble and assemble, facilitates the subsequent maintenance of the battery module and improves the feasibility of echelon recovery.

Description

Battery switching structure, connection piece, connection structure and battery module

Technical Field

The invention belongs to the technical field of batteries, and particularly relates to a battery switching structure, a connecting sheet, a connecting structure and a battery module.

Background

In the battery module in the prior art, the batteries are electrically connected through the connecting sheet, and the batteries are connected with the connecting sheet and the battery terminals in a welding manner. The disadvantage of this method is that, during the manufacturing and assembly process of the battery module or during the use process of the user, when a problem is found in a certain part of the module, the module cannot be disassembled to implement repair, replacement or maintenance measures, and finally the entire battery module is often discarded.

Therefore, it is necessary to provide a connection structure with simple structure, convenient maintenance, high recycling rate and stable structure.

Disclosure of Invention

The invention aims to provide a battery switching structure, a connecting sheet, a connecting structure and a battery module, and aims to solve the technical problems that the battery module is inconvenient to disassemble and assemble and is low in recycling rate in the prior art.

The invention is realized in this way, a battery switching structure, comprising a switching part and a connecting part, wherein:

the adapter part comprises a first plate, a second plate and an elastic piece, the first plate is connected with the first end of the connecting part, the first plate does not have freedom degree in a first direction, and the first direction is a direction perpendicular to the axis of the connecting part;

the second plate is connected with the connecting part in a sliding manner;

the elastic piece is arranged between the first plate and the second plate.

Furthermore, one end of the elastic piece is fixedly connected with the first plate, and the other end of the elastic piece is fixedly connected with the second plate.

Further, a spring accommodating cavity S is formed between the first plate and the second plate, and the elastic piece is arranged in the spring accommodating cavity S.

Further, a first positioning portion is arranged on the first plate.

Furthermore, a first through hole is formed in the first positioning portion, a second through hole is formed in the second plate, and the first through hole and the second through hole are coaxial.

The invention also provides a battery connecting piece which comprises a connecting piece body and a bent part, wherein the bent part comprises an inserting part and a connecting part, the inserting part is connected with the connecting piece body through the connecting part, an accommodating space is formed between the inserting part and the connecting piece body, and the accommodating space is used for accommodating the switching part of the battery switching structure.

Furthermore, the outer surfaces of the connecting sheet body and the bending part are coated with conductive layers.

Further, a second positioning part is arranged on the connecting piece body.

Furthermore, a third through hole is formed in the insertion part.

The invention also provides a battery connecting structure which comprises the battery switching structure and the battery connecting sheet.

Furthermore, a first positioning portion is arranged on the first plate, a second positioning portion is arranged on the connecting piece body, and the first positioning portion and the second positioning portion limit movement of the connecting piece body in the first direction.

Furthermore, a first through hole is formed in the first positioning portion, a second through hole is formed in the second plate, a third through hole is formed in the inserting portion, and the first through hole, the second through hole and the third through hole are coaxial.

Further, the fixing piece is arranged in the first through hole, the second through hole and the third through hole in a penetrating mode.

The invention also provides a battery module which is characterized by comprising the battery connecting structure and battery units, wherein the battery connecting structure connects the battery units in series or in parallel.

Further, the second end of the connecting part is fixedly connected with the pole of the battery unit.

Compared with the prior art, the invention has the technical effects that:

1. the battery switching structure is fixedly connected with the battery unit, and the connecting sheet is detachably clamped with the switching structure, so that the battery module assembled by the battery monomer, the switching structure and the connecting sheet does not need any laser welding, welding and positioning tools and laser welding machines in the whole assembly process, the production equipment cost is low, and the production efficiency is high;

2. the connecting sheet and the switching structure are clamped in place naturally due to the design of the elastic piece structure and the positioning structure, so that complex positioning is avoided, and the assembly operation is simpler and more convenient;

3. the battery module does not need to be destructively disassembled in the later maintenance and replacement process and the echelon utilization process, ensures that all parts are intact in the disassembly and replacement process, and improves the feasibility and the low cost of echelon utilization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

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

fig. 2 is an exploded view of a battery adapting structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery unit with a battery adapter structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a battery tab according to a second embodiment of the present invention;

FIG. 5 is a first process diagram of connecting a battery tab to a battery adapter structure according to a second or third embodiment of the present invention;

FIG. 6 is a second process diagram of connecting the battery connecting plate and the battery transferring structure according to the second or third embodiment of the present invention;

description of reference numerals:

in the figure, 10-battery unit, 11-battery pole, 20-battery connection structure, 30-switching structure, 300-switching part, 310-first plate, 311-first positioning part, 312-first through hole, 320-second plate, 321-second through hole, 330-elastic part, 340-connection part, 40-battery connection piece, 410-connection piece body, 411-second positioning part, 420-bending part, 421-plug part, 422-connection part, 423-third through hole, 50-battery module, S-spring accommodation cavity and w-gap.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

The battery module is generally formed by connecting a certain number of battery cells in series or in parallel, and as shown in fig. 1, the battery module 50 is formed by connecting a certain number of battery cells 10 in series, so that when the battery cells 10 are connected, both physical connection and electrical connection between the battery cells 10 are realized.

In the embodiment of the present invention, when the battery cells 10 are connected, the battery adapting structure 30 and the connecting sheet 20 are simultaneously used, and when the battery cells 10 are specifically connected, the connecting sheet 20 is directly inserted into the battery adapting structure 30, and the physical connection and the electrical connection between the battery cells 10 are simultaneously realized.

Specifically, the present invention provides a battery transfer structure, a connection tab, a connection structure, and a battery module, which will be described in detail in the embodiments below.

Example one

Fig. 2 is an exploded view of a battery adapting structure according to a first embodiment of the present invention, and fig. 3 is a schematic structural view of a battery unit to which the battery adapting structure is mounted.

The first embodiment of the present invention provides a battery adapter structure 30, which includes an adapter 300 and a connector 340, where the adapter 300 may be used to implement the insertion of a connecting sheet 20, and the connector 340 is used to connect to a terminal 11 of a battery unit 10;

specifically, the adapter 300 includes a first plate 310, a second plate 320, and an elastic member 330, the first plate 310 is connected to a first end of the connecting portion 340, the first plate 310 has no degree of freedom in a first direction, and the first direction is a direction perpendicular to an axis of the connecting portion 340;

in the first embodiment of the present invention, "the first plate 310 is connected to the first end of the connecting portion 340" at least includes two ways: in the first mode, the first plate 310 is fixedly connected with the first end of the connecting portion 340, for example, by welding, screwing, or the like; in the second way, the first plate 310 is provided with a corresponding through hole, so that the first end of the connecting part 340 can pass through the through hole, and the first end of the connecting part 340 is not required to be fixedly connected with the first plate 310;

the core of the connection of the first plate 310 to the first end of the connecting portion 340 is that the first plate 310 has no freedom degree in the first direction, and this is provided to make it possible for the connecting plate 20 to move the first plate 310 in the first direction when the connecting plate 20 is plugged onto the adapter 300, which is not desirable, so that the freedom degree of the first plate 310 in the first direction needs to be limited to ensure the smooth plugging of the connecting plate 20.

The connecting portion 340 may be a stud.

The second plate 320 is slidably connected with the connecting part 340;

when the connecting plate 20 is inserted into the adaptor 300, the connecting plate 20 lifts the second plate 320, and thus the second plate 320 and the connecting part 340 are slidably connected.

The elastic member 330 is disposed between the first plate 310 and the second plate 320.

When the connecting plate 20 is plugged onto the adapter 300, the connecting plate 20 lifts the second plate 320, and due to the elastic member 330 arranged between the first plate 310 and the second plate 320, the elastic member 330 applies a downward restoring force to the second plate 320 during the process of lifting the second plate 320 by the connecting plate 20, so that the fit between the second plate 320 and the connecting plate 20 is tighter.

As to the specific arrangement of the elastic member 330, at least the following may be adopted:

in the first mode, one end of the elastic member 330 is fixedly connected to the first plate 310, and the other end of the elastic member 330 is fixedly connected to the second plate 320; for example, the connection can be fixed by welding and the like;

in a second mode, a spring accommodating cavity S is formed between the first plate 310 and the second plate 320, and the elastic member 330 is disposed in the spring accommodating cavity S, in the second mode, one end of the elastic member 330 may be fixedly connected to the first plate 310, one end of the elastic member 330 may be in a free state, the other end of the elastic member 330 is fixedly connected to the second plate 320, and the other end of the elastic member 330 may be in a free state;

it should be noted that the above manner is only an example, and it is within the scope of the present invention that the elastic member 330 can apply a downward restoring force to the second plate 320.

Further, the first plate 310 is provided with a first positioning portion 311.

When the connecting plate 20 is inserted into the adaptor 300, the first positioning portion 311 may determine the position of the connecting plate 20 in the first direction.

It should be noted that the first positioning portion 311 shown in fig. 2 is a protrusion, but the first positioning portion 311 in the present invention may also be in other structures, such as a recess, a groove, etc.; in addition, the number of the first positioning portions 311 shown in fig. 2 is one, but the number of the first positioning portions 311 in the present invention may be plural;

further, the first positioning portion 311 is provided with a first through hole 312, the second plate 320 is provided with a second through hole 321, and the first through hole 312 and the second through hole 321 are coaxial.

The first through hole 312 and the second through hole 321 are provided for the purpose of mounting a fixing member described below.

Example two

As shown in fig. 4, which is a schematic view of a battery connecting sheet according to a second embodiment of the present invention, a battery connecting sheet 40 according to the second embodiment of the present invention includes a connecting sheet body 410 and a bent portion 420, where the bent portion 420 includes an insertion portion 421 and a connecting portion 422, the insertion portion 421 is connected to the connecting sheet body 410 through the connecting portion 422, and a receiving space is formed between the insertion portion 421 and the connecting sheet body 410, and the receiving space is used for receiving the adapter 300 of the battery adapting structure according to the first embodiment.

5-6 show the connection process of the battery connecting sheet and the battery transfer structure; in fig. 5, in the process of inserting the battery connecting sheet 40 into the battery adapting structure 30, since the second plate 320 is slidably connected to the connecting portion 340, the connecting sheet body 410 lifts the second plate 320, so that a gap w is formed between the second plate 320 and the electrode post 11 of the battery unit, and the elastic member 330 is compressed, when the battery connecting sheet 40 reaches a preset position, the second plate 320 is continuously lowered under the restoring force of the elastic member 330, so that the gap w between the second plate 320 and the electrode post 11 of the battery unit is eliminated, and the battery connecting sheet 40 is in close contact with the electrode post 11.

Further, the outer surfaces of the connecting sheet body 410 and the bent portion 420 are coated with a conductive layer, so as to form a stable electrical connection between the battery connecting sheet 40 and the electrode post 11, and as for the specific material of the conductive layer, for example, a conductive metal layer.

Further, in order to facilitate the insertion and make the inserted battery connecting sheet located at a relatively fixed position, the connecting sheet body 410 is provided with a second positioning portion 411.

Further, a third through hole 423 is disposed on the inserting part 421.

The third through hole 423 is provided for mounting a fixing member described later.

EXAMPLE III

With continued reference to fig. 5-6, a battery connection structure 20 is also provided in a third embodiment of the invention, which includes a battery transition structure 30 as in the first embodiment and a battery tab 40 as in the second embodiment.

Specifically, the first plate 310 is provided with a first positioning portion 311, the connecting piece body 410 is provided with a second positioning portion 411, and the first positioning portion 311 and the second positioning portion 411 limit the movement of the connecting piece body 410 in the first direction.

After the movement of the connecting piece body 410 in the first direction is limited, the battery connecting piece 40 can be conveniently inserted and connected in place on the battery adapting structure 30, and the dislocation of the battery connecting piece 40 in the shaking process (the shaking process may be generated in the actual use process of the battery module or in the actual production process of the battery module) can be prevented.

Regarding the specific structure of the first positioning portion 311 and the second positioning portion 411, the first positioning portion 311 shown in fig. 5 and 6 is a protrusion, and the second positioning portion 411 is a groove, in fact, the first positioning portion 311 and the second positioning portion 411 may also be in other structural forms, and the protection scope of the present invention is not limited to only the form in which the first positioning portion 311 is a protrusion, and the second positioning portion 411 is a groove;

for example, the first positioning portion 311 may be in the form of a recess, a groove, or the like, and the second positioning portion 411 may be in the form of a protrusion;

as for the number of the first positioning portions 311 and the second positioning portions 411, the number of the first positioning portions 311 and the second positioning portions 411 shown in fig. 5 and 6 is one, but the number of the first positioning portions 311 and the second positioning portions 411 in the present invention may also be plural;

in order to realize stable connection between the battery connecting structure 20 and the battery unit 10, the first positioning portion 311 is provided with a first through hole 312, the second plate 320 is provided with a second through hole 321, the inserting portion 421 is provided with a third through hole 423, and the first through hole 312, the second through hole 321, and the third through hole 423 are coaxial.

Further, the fixing member is further included, and the fixing member is inserted into the first through hole 312, the second through hole 321, and the third through hole 423, and the fixing member may be a screw, or the like.

The battery connecting structure 20 can be stably connected to the battery cell 10 by the fixing member.

Example four

With continued reference to fig. 1, a battery module 50 according to a fourth embodiment of the present invention includes the battery connecting structure 20 according to the third embodiment and the battery units 10, wherein the battery connecting structure 20 connects the battery units 10 in series or in parallel.

Further, the second end of the connecting portion 340 is fixedly connected to the pole 11 of the battery unit 10.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A battery adapting structure (30) comprising an adapting portion (300) and a connecting portion (340), wherein:

the adapter (300) comprises a first plate (310), a second plate (320) and an elastic piece (330), wherein the first plate (310) is connected with a first end of the connecting part (340), the first plate (310) has no degree of freedom in a first direction, and the first direction is a direction perpendicular to the axis of the connecting part (340);

the second plate (320) is slidably connected with the connecting part (340);

the elastic member (330) is disposed between the first plate (310) and the second plate (320).

2. A battery transfer structure (30) according to claim 1, wherein one end of said elastic member (330) is fixedly connected to said first plate (310), and the other end of said elastic member (330) is fixedly connected to said second plate (320).

3. A battery switching structure (30) according to claim 1, wherein said first plate (310) and said second plate (320) define a spring receiving chamber (S) therebetween, and said elastic member (330) is disposed in said spring receiving chamber (S).

4. A battery transition structure (30) according to claim 1, wherein the first plate (310) is provided with first positioning portions (311).

5. The battery transition structure (30) according to claim 4, wherein the first positioning portion (311) is provided with a first through hole (312), the second plate (320) is provided with a second through hole (321), and the first through hole (312) and the second through hole (321) are coaxial.

6. A battery connecting piece (40) is characterized by comprising a connecting piece body (410) and a bent part (420), wherein the bent part (420) comprises an inserting part (421) and a connecting part (422), the inserting part (421) is connected with the connecting piece body (410) through the connecting part (422), a containing space is formed between the inserting part (421) and the connecting piece body (410), and the containing space is used for containing the adapter part (300) of the battery switching structure according to any one of claims 1 to 5.

7. A battery tab (40) according to claim 6, wherein the outer surfaces of the tab body (410) and the bent portion (420) are coated with a conductive layer.

8. A battery connecting tab (40) according to claim 6, wherein the connecting tab body (410) is provided with a second positioning portion (411).

9. A battery connecting tab (40) according to claim 7, wherein the insertion part (421) is provided with a third through hole (423).

10. A battery connecting structure (20) comprising a battery transit structure (30) according to any one of claims 1 to 3 and a battery tab (40) according to any one of claims 6 to 7.

11. A battery connecting structure (20) according to claim 10, wherein a first positioning portion (311) is provided on the first plate (310), a second positioning portion (411) is provided on the connecting sheet body (410), and the first positioning portion (311) and the second positioning portion (411) restrict movement of the connecting sheet body (410) in the first direction.

12. The battery connecting structure (20) according to claim 11, wherein the first positioning portion (311) is provided with a first through hole (312), the second plate (320) is provided with a second through hole (321), the inserting portion (421) is provided with a third through hole (423), and the first through hole (312), the second through hole (321), and the third through hole (423) are coaxial.

13. A battery connecting structure (20) according to claim 12, further comprising a fixing member, wherein the fixing member is inserted into the first through hole (312), the second through hole (321), and the third through hole (423).

14. A battery module (50) characterized by comprising the battery connecting structure (20) according to any one of claims 10 to 13 and battery cells (10), the battery connecting structure (20) connecting the battery cells (10) in series or in parallel.

15. A battery module (50) according to claim 14, wherein the second end of the connecting portion (340) is fixedly connected to the terminal of the battery cell (10).