CN210926135U

CN210926135U - Lithium battery connection structure

Info

Publication number: CN210926135U
Application number: CN201921525079.4U
Authority: CN
Inventors: 王�华
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-07-03
Anticipated expiration: 2029-09-11

Abstract

The utility model relates to a lithium battery connection structure belongs to the battery technology field, and this lithium battery includes a plurality of lithium cell, every the last equal protruding binding post that is equipped with of lithium cell, binding post is including establishing anodal binding post and negative terminal, anodal binding post with negative terminal all is equipped with the first through-hole that is used for passing the bolt, and is a plurality of lithium cell is through the screw bolt and the nut series connection in proper order of mutually supporting, the utility model discloses a welded connection's mode has been replaced among the prior art to bolted connection's mode for every lithium cell is all more convenient and fast in installation or dismantlement, and, the phenomenon of welding, rosin joint or false welding can not appear also in binding post.

Description

Lithium battery connection structure

Technical Field

The utility model belongs to the technical field of the battery, in particular to lithium cell connection structure.

Background

The storage battery of the storage battery car comprises a storage battery shell and a lithium storage battery arranged in the storage battery shell, wherein the lithium storage battery is generally formed by serially connecting a plurality of storage battery units, and a socket interface for charging and discharging is arranged on the storage battery shell.

In the battery cell connection, the connection terminals of the adjacent battery cells are connected by welding in the prior art, but the connection terminals are connected by welding, which has the following defects:

1. in the welding process, an oxide layer is formed at the welding position of the connecting terminal, and the current flows through the oxide layer, so that the resistance is increased, and the transmission of the current is influenced.

2. The condition of false soldering or cold soldering is easily generated in the soldering process, and the soldered part after the false soldering or cold soldering is not firm and is easy to break.

3. When a certain storage battery unit is damaged or the battery capacity is insufficient and needs to be replaced, the welding position of the storage battery unit needs to be cut for replacement, moreover, the connecting terminal after welding cannot be welded for the second time, the oxide layer needs to be removed or the other part on the connecting terminal, which is not welded, needs to be re-welded, the situation of false welding or false welding can be caused due to incomplete removal of the oxide layer, the oxide layer of the connecting terminal of the storage battery unit can be further increased due to the fact that the part, which is not welded, is found for re-welding, the transmission of current is further influenced, and the re-welding replacement process is very complicated no matter the oxide layer is removed and the part, which is not welded, is found for re-welding.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lithium cell connection structure has solved the increase resistance that adopts welded connected mode to exist among the prior art, has changed the loaded down with trivial details technical problem of battery unit process.

The utility model discloses a following technical scheme realizes:

the utility model provides a lithium cell connection structure includes a plurality of lithium cell, every equal protruding binding post that is equipped with on the lithium cell, binding post is including establishing anodal binding post and negative terminal, anodal binding post with negative terminal all is equipped with the first through-hole that is used for passing the bolt, and is a plurality of lithium cell is through the bolt and the nut of mutually supporting series connection in proper order.

Further, for better realization the utility model discloses, positive binding post with negative binding post is the sheet metal of easily buckling.

Further, for better realization the utility model discloses, it is a plurality of lithium cell sets up side by side along same direction, adjacent two lithium cell's positive binding post and negative binding post reverse setting and align.

Further, for better realization the utility model discloses, every positive pole binding post and the equal symmetry setting of negative pole binding post on the lithium cell are in the top of lithium cell.

Further, for better realization the utility model discloses, adjacent two be equipped with the double faced adhesive tape between the lithium cell, two adhesive surfaces of double faced adhesive tape are pasted respectively in adjacent two on the lithium cell.

Further, for better realization the utility model discloses, still including binding the area, bind the area and be used for all lithium battery cell is binded fixedly.

Further, for better realization the utility model discloses, bind and take for sticky tape or magic tape, sticky tape or magic tape winding wrap up in all the outside of lithium cell.

Further, for better realization the utility model discloses, lithium cell's series connection department parcel has insulating sticky tape.

Further, for better realization the utility model discloses, still install two first connecting wires that are used for storage battery car power supply and charge on the lithium cell, first connecting wire includes interconnect's first connecting ring and first wire, the internal diameter of first connecting ring is the same with the internal diameter of first through-hole, two first connecting wire is installed on the positive binding post and the negative binding post of first two last lithium cell in a plurality of lithium cell through bolt and nut respectively or two first connecting wire connects respectively on the negative binding post and the positive binding post of first two last lithium cell in a plurality of lithium cell.

Further, for better realization the utility model discloses, still be connected with the many second connecting wires that are used for charging for the storage battery car on the lithium cell, the second connecting wire includes interconnect's second go-between and second wire, the internal diameter of second go-between is the same with the internal diameter of first through-hole, many the second connecting wire is installed in adjacent through bolt and nut respectively lithium cell's series connection department.

The utility model discloses compare in prior art and have following beneficial effect: the utility model discloses first through-hole has all been seted up on lithium cell's anodal connecting terminal and negative pole connecting terminal to pass first through-hole with the bolt and with two adjacent lithium cell's anodal connecting terminal and negative pole connecting terminal fixed connection together and with nut locking, welded connection's mode among the prior art has been replaced to the mode through bolted connection, make every lithium cell all more convenient and fast in installation or dismantlement, and, binding post can not appear sending out the phenomenon of welding, rosin joint or pseudo-soldering yet.

Drawings

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

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of the lithium secondary battery of the present invention after the first connecting line and the second connecting line are connected.

In the figure:

1-a lithium battery cell; 2-positive terminal; 3-a negative pole wiring terminal; 4-a bolt; 5-a nut; 6-a first connection line; 7-a second connecting line; 8-binding belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The left, right, up, down, and the like directional concepts described in this embodiment are based on the front, back, left, right, up, down, and the like directional concepts shown in fig. 1, specifically, the left side shown in fig. 1 is left, the right side shown in fig. 1 is right, the upper side shown in fig. 1 is up, and the lower side shown in fig. 1 is down.

Example 1:

as shown in figures 1 and 2, a lithium battery connection structure, a serial communication port, including a plurality of lithium cell 1, all lithium cell 1 all lays in the storage battery shell, and the storage battery shell is prior art, and is not shown in the figure, every all protruding binding post that is equipped with on the lithium cell 1, binding post is including establishing positive binding post 2 and negative binding post 3, positive binding post 2 with negative binding post 3 all is equipped with the first through-hole that is used for passing bolt 4, and is a plurality of lithium cell 1 is through the first through-hole of the positive binding post 2 of two adjacent lithium cell 1 and negative binding post 3 and fixed with the first through-hole of nut 5 spiro union through bolt 4 and nut 5 series connection, and the series connection that here mentions indicates, and positive binding post 2 of first lithium cell 1 passes through bolt 4 and nut 3 with the negative binding post 3 of second lithium cell 1 5, the positive terminal 2 of the second lithium battery unit 1 is connected with the negative terminal 3 of the third lithium battery unit 1 through the bolt 4 and the nut 5, and so on, until the positive terminal 2 of the (N-1) th lithium battery unit 1 is connected with the negative terminal 3 of the (N) th lithium battery unit 1 through the bolt 4 and the nut 5, the negative terminal 3 of the first lithium battery unit 1 and the positive terminal 2 of the (N) th lithium battery unit 1 are used for being connected with an external connecting wire and used for charging or discharging a lithium storage battery.

Specifically, as shown in fig. 1, in the present embodiment, the number of the lithium battery cells 1 is 6, each lithium battery cell 1 is 8V, the 6 lithium battery cells 1 are connected in series to form a 48V lithium secondary battery, a plus sign is marked at the positive pole of the lithium battery cell 1, and a minus sign is marked at the negative pole of the lithium battery cell 1.

The mode of welding connection in the prior art is replaced by the mode of bolt connection, so that each lithium battery unit 1 is more convenient and quicker to mount or dismount, and the phenomena of welding, insufficient welding or false welding can not occur on the wiring terminal.

Example 2:

the embodiment is a further implementation manner of embodiment 1, in this embodiment, the positive terminal 2 and the negative terminal 3 are both metal sheets or metal sheets that are easy to bend, such as aluminum sheets, copper sheets or other metal sheets with high conductivity, because the metal sheets have certain deformability, when using the bolt 4 to connect, the positive terminal 2 and the negative terminal 3 of each lithium battery unit 1 are both bent outwards, so that when connecting in series, the positive terminal 2 and the negative terminal 3 of two adjacent lithium battery units 1 can be attached together, and then the bolt 4 is screwed tightly by the nut 5 after passing through the first through hole, and the contact area of the attached positive terminal 2 and the attached negative terminal 3 is larger, and the connection is more stable.

It is a plurality of lithium cell 1 sets up side by side from a left side to the right side in proper order, adjacent two lithium cell 1's positive binding post 2 and negative binding post 3 reverse setting and align, and reverse setting here indicates, in two adjacent lithium cell 1, last lithium cell 1's positive binding post 2 aligns with next lithium cell 1's negative binding post 3, and last lithium cell 1's negative binding post 3 aligns with next lithium cell 1's positive binding post 2 to two adjacent lithium cell 1 establish ties.

More preferably, positive binding post 2 and the top of 3 symmetry and the spaced lithium cell 1 of negative pole binding post on every lithium cell 1, when using, only need rotate 180 realization lithium cell 1's reverse setting with adjacent lithium cell 1 level, can make two adjacent lithium cell 1's positive binding post 2 align with negative pole binding post 3.

In addition, as shown in fig. 2, still install two first connecting wires 6 that are used for supplying power and charging for the storage battery car on the lithium cell, first connecting wire 6 includes interconnect's first connecting ring and first wire, the internal diameter of first connecting ring is the same with the internal diameter of first through-hole, two first connecting wire 6 is installed respectively through bolt 4 and nut 5 and is gone up or two in a plurality of lithium cell 1 first last two lithium cell 1's positive binding post 2 and negative binding post 3 first connecting wire 6 is connected respectively in a plurality of lithium cell 1 first last two lithium cell 1's negative binding post 3 and positive binding post 2 on, first connecting wire 6's first wire and storage battery shell's socket interface connection.

More preferably, as shown in fig. 2, the lithium battery is further connected with a plurality of second connecting lines 7 for charging the battery car, each second connecting line 7 comprises a second connecting ring and a second lead which are connected with each other, the inner diameter of each second connecting ring is the same as that of each first through hole, the second connecting rings are respectively installed at adjacent series-connection positions of the lithium battery units 1 through bolts 4 and nuts 5, and the bolts 4 are fixed through the nuts 5 in a screwed manner after penetrating through the first through holes of the positive wiring terminals 2 and the negative wiring terminals 3 and the inner holes of the second connecting rings of the second connecting lines 7. In this embodiment, the second connection ring is disposed between the positive connection terminal 2 and the negative connection terminal 3 connected in series, the second connection ring can provide a supporting force for the metal sheet or the metal sheet, and the second wires of the plurality of second connection lines 7 are connected in parallel with the first wire of the last lithium battery unit 1, so as to ensure that the charging voltages of the plurality of lithium battery units 1 are the same when the plurality of lithium battery units 1 are charged simultaneously, so that each lithium battery unit 1 can be charged quickly.

Example 3:

the embodiment is the more excellent embodiment of above-mentioned embodiment, and in this embodiment, adjacent two be equipped with the double faced adhesive tape between the lithium cell 1, two adhesive surfaces of double faced adhesive tape are pasted respectively in adjacent two on the lithium cell 1, the lithium cell 1 after the bonding forms a whole, can avoid producing between the lithium cell 1 and rock to avoided the lithium cell 1 to rock the binding post deformation or the cracked condition that causes, improved the life of battery.

And, after the lithium battery cells 1 are bonded with the double-sided tape, at least one binding band 8 is bound outside the lithium secondary battery to further fixedly connect all the lithium battery cells 1. The binding belt 8 can be an adhesive tape or a magic tape, in the embodiment, all the lithium battery units 1 are wound and fixed together by the adhesive tape to form a lithium battery, and the lithium battery is placed in the shell to form a battery of the battery car.

In addition, the series connection part of the lithium battery cells 1 is wrapped with an insulating tape to prevent the lithium battery cells 1 from electric leakage.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a lithium battery connection structure, its characterized in that, includes a plurality of lithium cell, every the last equal protruding binding post that is equipped with of lithium cell, binding post is including establishing positive binding post and negative binding post, positive binding post with negative binding post all is equipped with the first through-hole that is used for passing the bolt, and is a plurality of lithium cell is through the bolt and the nut of mutually supporting series connection in proper order.

2. The lithium battery connection structure as claimed in claim 1, wherein the positive electrode connection terminal and the negative electrode connection terminal are thin metal plates that are easily bent.

3. The lithium battery connection structure as claimed in claim 2, wherein the plurality of lithium battery cells are arranged side by side in the same direction, and the positive electrode terminals and the negative electrode terminals of two adjacent lithium battery cells are arranged in opposite directions and aligned.

4. The lithium battery connection structure as claimed in claim 3, wherein the positive electrode connection terminal and the negative electrode connection terminal of each lithium battery cell are symmetrically arranged on the top of the lithium battery cell.

5. The lithium battery connection structure as claimed in any one of claims 1 to 4, wherein a double-sided adhesive tape is disposed between two adjacent lithium battery cells, and two adhesive surfaces of the double-sided adhesive tape are respectively adhered to two adjacent lithium battery cells.

6. The lithium battery connection structure as claimed in claim 5, further comprising a binding band for binding and fixing all the lithium battery cells.

7. The lithium battery connection structure of claim 6, wherein the binding tape is an adhesive tape or a magic tape, and the adhesive tape or the magic tape is wound around the outer sides of all the lithium batteries.

8. The lithium battery connection structure as claimed in any one of claims 1 to 4, wherein the series connection of the lithium battery cells is wrapped with an insulating tape.

9. The lithium battery connection structure as claimed in any one of claims 1 to 4, wherein two first connection lines for supplying and charging power to and charging the battery car are further installed on the lithium battery, the first connection lines include a first connection ring and a first wire connected to each other, an inner diameter of the first connection ring is the same as an inner diameter of the first through hole, and the two first connection lines are respectively installed on the positive connection terminal and the negative connection terminal of the first and last two lithium battery cells of the plurality of lithium battery cells by bolts and nuts or are respectively connected to the negative connection terminal and the positive connection terminal of the first and last two lithium battery cells of the plurality of lithium battery cells.

10. The lithium battery connection structure as claimed in any one of claims 1 to 4, wherein a plurality of second connection lines for charging the battery car are further connected to the lithium battery, the second connection lines include second connection rings and second conductive wires connected to each other, the second connection rings have the same inner diameter as that of the first through holes, and the second connection lines are respectively mounted at the series connection positions of the adjacent lithium battery cells by bolts and nuts.