CN213340561U

CN213340561U - Lithium battery module

Info

Publication number: CN213340561U
Application number: CN202022283710.3U
Authority: CN
Inventors: 何剑浩; 金亚方; 杨婷婷; 倪家伟; 刘焕红
Original assignee: Suzhou Fuchang Space Technology Co ltd
Current assignee: Suzhou Fuchang Space Technology Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-06-01
Anticipated expiration: 2030-10-14

Abstract

The utility model belongs to the technical field of the lithium cell, a lithium cell module is disclosed, including a plurality of electric cores, insulating locating part, insulating fixing device and convergent current piece. Be provided with the shoulder hole on the insulating locating part, be provided with a plurality of spacing holes with electric core one-to-one and locate the terminal first connecting hole in spacing hole on the insulating fixing device, through embedding the both ends of electric core respectively the big aperture part of the shoulder hole on the insulating locating part and the spacing hole on the insulating fixing device, make the electrode interval of electric core obtain the guarantee, the electrode can not appear and bump and lead to the short circuit. Be provided with a plurality of archs on the piece that converges, the arch stretches into the shoulder hole and is connected with the electrode electricity of electric core first end to and/or stretch into in the first connecting hole and be connected with the electrode electricity of electric core second end, through the limiting displacement in shoulder hole and spacing hole, make the arch contact with the central point of electric core electrode puts.

Description

Lithium battery module

Technical Field

The utility model relates to a lithium cell technical field especially relates to a lithium cell module.

Background

With the development of aerospace industry, more satellites adopt lithium battery packs as energy storage power sources. The lithium battery pack mainly comprises a battery core, a structure fixing piece, a bus bar and the like. The current collecting sheet is used for connecting electrodes of all the monomer battery cells into a whole so as to charge and discharge the monomer battery cells together. According to the requirement of a series-parallel connection mode of the battery pack, the bus plates are connected in a certain mode, and insulation among the battery cores is required at the position where the bus plates are not connected, so that short circuit is avoided. The traditional scheme often lacks the insulation protection between the electric core, and the easy electrode bumps when the group battery is whole to vibrate or receives mechanical impact, causes the short circuit. Traditional bus bar piece is the banding, need counterpoint when welding on electric core, welds partially easily, and especially the bus bar piece is longer, hardly keeps sharp welding.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium battery module to solve the difficult problem of aiming at of the contact position of current lithium battery module electricity core electrode easy short circuit and confluence piece and electricity core electrode.

To achieve the purpose, the utility model adopts the following technical proposal:

a lithium battery module, comprising:

a plurality of cells;

the inner side of the insulation limiting part is arranged at the first end of the battery cell, a plurality of stepped holes which are arranged in one-to-one correspondence with the battery cell are arranged at intervals on the insulation limiting part, the first end of the battery cell is inserted into the part with the large aperture of the stepped hole, and the electrode at the first end of the battery cell is positioned in the part with the small aperture of the stepped hole;

the inner side of the insulating fixing device is arranged at the second end of the battery cell, the insulating fixing device is provided with a plurality of limiting holes which are arranged in one-to-one correspondence with the battery cell and first connecting holes which are arranged at the tail ends of the limiting holes, and the second end of the battery cell is inserted into the first connecting holes through the limiting holes;

the current converging sheet, the insulating locating part with the outside of insulating fixing device all is provided with the current converging sheet, the current converging sheet is provided with a plurality of archs, the arch stretches into in the shoulder hole with the electrode electricity of electric core first end is connected, and/or stretches into in the first connecting hole with the electrode electricity of electric core second end is connected.

Preferably, the height of the protrusion is greater than the length of the small aperture portion of the stepped hole and the length of the first connection hole.

Preferably, a plane is arranged at the top end of the protrusion, and the plane is attached to the electrode of the battery core.

Preferably, the protrusions are welded to the electrodes of the battery cell.

Preferably, the insulation fixing device comprises a base, and the limiting hole is formed in the base.

Preferably, the two sides of the base are provided with ear plates.

Preferably, the insulation fixing device further comprises an insulation plate, the insulation plate is fixedly connected to the outer side of the base, and the first connection hole is formed in the insulation plate.

Preferably, the lithium battery module further comprises a connecting assembly, and the insulating limiting part and the insulating fixing device are fixedly connected through the connecting assembly.

Preferably, the connecting assembly comprises a pull rod and a screw, a threaded hole is formed in the first end of the pull rod, and an external thread is formed in the second end of the pull rod;

a second connecting hole is formed in the insulating limiting piece, and the screw penetrates through the second connecting hole and is connected to the first end of the pull rod in a threaded mode;

the base is provided with a threaded hole, and the second end of the pull rod is in threaded connection with the threaded hole of the base.

Preferably, the lithium battery module further comprises a cover plate, the cover plate is fixedly connected to one side, far away from the battery core, of the base, and the cover plate presses the insulating plate and the bus bar on the outer side of the insulating plate on the base.

The utility model has the advantages that:

the utility model provides a lithium battery module, including a plurality of electric cores, insulating locating part, insulating fixing device and conflux piece. Be provided with the shoulder hole on the insulating locating part, be provided with a plurality of spacing holes with electric core one-to-one and with the first connecting hole of spacing coaxial setting in hole on the insulating fixing device, through embedding the both ends of electric core respectively the big aperture part of the shoulder hole on the insulating locating part and the spacing hole on the insulating fixing device, make the electrode interval of electric core obtain the guarantee, the electrode can not appear and bump and lead to the short circuit. Be provided with a plurality of archs on the piece that converges, the arch stretches into in the shoulder hole and is connected with the electrode of electric core first end, and/or stretches into in first connecting hole and the electrode connection of electric core second end, and through the limiting displacement in shoulder hole and spacing hole, the central point that makes arch and electric core electrode puts and contacts.

Drawings

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

fig. 2 is a schematic structural diagram of a lithium battery module according to the present invention;

fig. 3 is an exploded view of a lithium battery module according to the present invention;

fig. 4 is a first schematic structural diagram of an insulation limiting member of a lithium battery module according to the present invention;

fig. 5 is a second schematic structural diagram of an insulation limiting member of a lithium battery module according to the present invention;

fig. 6 is a schematic structural diagram of a base of a lithium battery module provided by the present invention;

fig. 7 is a first schematic structural diagram of a bus bar of a lithium battery module provided by the present invention;

fig. 8 is a schematic structural diagram of a bus bar of a lithium battery module according to the present invention;

fig. 9 is a schematic structural diagram of an insulating plate of a lithium battery module provided by the present invention;

fig. 10 is a schematic structural diagram of a pull rod of a lithium battery module according to the present invention.

In the figure:

1. an electric core;

2. an insulating limit member; 21. a stepped hole; 22. a second connection hole;

3. an insulating fixing device; 31. a limiting hole; 32. a first connection hole; 33. a base; 331. an ear plate; 34. an insulating plate;

4. a confluence sheet; 41. a protrusion;

5. a connecting assembly; 51. a pull rod; 52. a screw;

6. and (7) a cover plate.

Detailed Description

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

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

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

As shown in fig. 1-3, the utility model provides a lithium battery module, including a plurality of electric cores 1, insulating locating part 2, insulating fixing device 3 and conflux sheet 4. The battery cell 1 is used for charging and discharging.

As shown in fig. 4 to 5, the inner side of the insulating position-limiting member 2 is disposed at the first end of the battery cell 1, the insulating position-limiting member 2 is disposed with a plurality of stepped holes 21 disposed in one-to-one correspondence with the battery cells 1 at intervals, the first end of the battery cell 1 is inserted into the large-aperture portion of the stepped hole 21, and the electrode at the first end of the battery cell 1 is located in the small-aperture portion of the stepped hole 21.

As shown in fig. 1 to 3, the inner side of the insulating fixing device 3 is disposed at the second end of the battery cell 1, the insulating fixing device 3 is provided with a plurality of limiting holes 31 disposed in one-to-one correspondence with the battery cells 1 and a first connection hole 32 disposed at the end of the limiting hole 31, and the second end of the battery cell 1 is inserted into the first connection hole 32 through the limiting hole 31.

The two ends of the battery cell 1 are respectively embedded into the large-aperture part of the stepped hole 21 on the insulating limiting part 2 and the limiting hole 31 on the insulating fixing device 3, so that the electrode interval of the battery cell 1 is ensured, and short circuit caused by electrode collision can not occur.

Alternatively, as shown in fig. 3 and 6, the insulating fixing device 3 includes a base 33, and the limiting hole 31 is provided on the base 33. Both sides of the base 33 are provided with ear plates 331. Specifically, in this embodiment, four lug plates 331 are disposed on two sides of the base 33 at intervals, fixing holes are disposed on the lug plates 331, and the base 33 is fixed at the working position of the lithium battery module by passing through the fixing holes through a connecting member such as a bolt or a screw. By providing the ear plate 331, a fixing position is provided for the base 33, and the base 33 can be fixed without destroying the structure of the base 33. Furthermore, rib plates are arranged on two sides of the ear plate 331 and perpendicular to the base 33. The rib plates are arranged to strengthen the structural strength of the ear plates 331, so that the ear plates 331 are not easy to break and damage.

Optionally, as shown in fig. 3, the insulation fixing device 3 further includes an insulation plate 34, the insulation plate 34 is fixedly connected to the outer side of the base 33, and the first connection hole 32 is disposed on the insulation plate 34. Specifically, in the present embodiment, the insulating plate 34 and the base 33 are fixed by screws, the position-limiting hole 31 and the first connecting hole 32 are both circular holes, and the diameter of the first connecting hole 32 is smaller than the position-limiting hole 31. Through setting up insulation board 34, make electric core 1 can not appear electrode and metallic structure direct contact and cause the short circuit when lithium battery module integral vibration or receive mechanical impact.

As shown in fig. 3, fig. 7 and fig. 8, the outside of the insulation limiting member 2 and the insulation fixing device 3 are both provided with a bus bar 4, the bus bar 4 is provided with a plurality of protrusions 41, and the protrusions 41 extend into the stepped hole 21 to be electrically connected with the electrode at the first end of the electric core 1, and/or extend into the first connecting hole 32 to be electrically connected with the electrode at the second end of the electric core 1. The protrusion 41 is in contact with the center of the electrode of the battery cell 1 by the limiting action of the stepped hole 21 and the limiting hole 31.

Alternatively, as shown in fig. 1 and 7, the height of the protrusion 41 is greater than the length of the small aperture portion of the stepped hole 21 and the length of the first connection hole 32, and the top end of the protrusion 41 is provided with a plane, which is attached to the electrode of the battery cell 1. The projection 41 is welded to the electrode of the battery cell 1. Specifically, in the present embodiment, the bus bar 4 is made of nickel. Through setting up the plane at protruding 41 top, make the contact between protruding 41 and the electric core 1 electrode more stable, the piece 4 that converges is put to level and is represented the assembly promptly and put in place, need not extra frock or artifical counterpoint, also conveniently welds between the electrode of protruding 41 and electric core 1 simultaneously. The height of the protrusion 41 is greater than the length of the small-aperture part of the stepped hole 21 and the length of the first connection hole 32, so that the bus bar 4 is not in contact with the insulating limiting part 2 or the insulating plate 34 except the electrode welding of the protrusion 41 and the battery cell 1, and is in a relatively free state, and the bus bar 4 is less affected by the displacement between the battery cells 1 or other structural vibrations when the lithium battery module generates mechanical vibrations.

Optionally, as shown in fig. 3 and 10, the lithium battery module further includes a connecting assembly 5, and the insulating limiting member 2 and the insulating fixing device 3 are fixedly connected by the connecting assembly 5. Specifically, in the present embodiment, the connection assembly 5 includes a pull rod 51 and a screw 52. The pull rod 51 is provided with a threaded hole at a first end and an external thread at a second end. The insulation limiting member 2 is provided with a second connecting hole 22, and a screw 52 is threaded to the first end of the pull rod 51 through the second connecting hole 22. The base 33 is provided with a threaded hole, and the second end of the pull rod 51 is in threaded connection with the threaded hole of the base 33. Fix electric core 1 between insulating locating part 2 and base 33 through setting up coupling assembling 5.

Optionally, as shown in fig. 2 to 3, the lithium battery module further includes a cover plate 6, the cover plate 6 is fixedly connected to a side of the base 33 away from the battery cell 1, and the cover plate 6 presses the insulating plate 34 and the bus bar 4 outside the insulating plate 34 on the base 33. Specifically, in the present embodiment, screw holes are provided in the cover plate 6 and the base plate 33, and the cover plate 6 is fixed to the base plate 33 by screws. Through setting up apron 6 with the busbar 4 pressfitting in the insulation board 34 and the insulation board 34 outside on base 33, make busbar 4 can not drop because of the action of gravity of electricity core 1.

The assembling process comprises the following steps:

firstly, fixing the insulating plate 34 at the bottom end of the base 33 through a screw, and then screwing the second end of the pull rod 51 provided with the external thread into the threaded hole on the base 33; then, the second end of the battery cell 1 is placed into the limiting hole 31 from the upper end of the base 33, the insulating limiting part 2 is buckled at the first end of the battery cell 1, so that the first end of the battery cell 1 is embedded into the large-aperture part of the stepped hole 21 on the insulating limiting part 2, then the screw 52 penetrates through the second connecting hole 22 on the insulating limiting part 2 and is in threaded connection with the first end of the pull rod 51, and at this time, the battery cell 1 is fixed between the base 33 and the insulating limiting part 2; according to the series and parallel requirements of the lithium battery module, selecting proper bus bars 4 to be respectively placed on the outer side of the insulating plate 34 and the outer side of the insulating limiting part 2, wherein a protrusion 41 on the bus bar 4 on the outer side of the insulating plate 34 extends into the first connecting hole 32 to be contacted with the electrode of the battery core 1, a protrusion 41 on the bus bar 4 on the outer side of the insulating limiting part 2 extends into the stepped hole 21 to be contacted with the electrode of the battery core 1, and then welding the protrusion 41 and the electrode of the battery core 1; finally, the cover plate 6 is fixedly connected to the outer side of the base 33 through screws, and the insulating plate 34 and the bus bar 4 on the outer side of the insulating plate 34 are pressed on the base 33 through the cover plate 6.

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

Claims

1. A lithium battery module, comprising:

a plurality of cells (1);

the inner side of the insulation limiting part (2) is arranged at the first end of the battery cell (1), a plurality of stepped holes (21) which are arranged in one-to-one correspondence with the battery cell (1) are arranged on the insulation limiting part (2) at intervals, the first end of the battery cell (1) is inserted into the part with the large aperture of the stepped hole (21), and the electrode at the first end of the battery cell (1) is positioned in the part with the small aperture of the stepped hole (21);

the inner side of the insulating fixing device (3) is arranged at the second end of the battery cell (1), the insulating fixing device (3) is provided with a plurality of limiting holes (31) which are arranged in one-to-one correspondence with the battery cell (1) and first connecting holes (32) which are arranged at the tail ends of the limiting holes (31), and the second end of the battery cell (1) is inserted into the first connecting holes (32) through the limiting holes (31);

the battery cell comprises a current collecting sheet (4), wherein the outer sides of the insulation limiting part (2) and the insulation fixing device (3) are provided with the current collecting sheet (4), the current collecting sheet (4) is provided with a plurality of protrusions (41), the protrusions (41) extend into the stepped hole (21) and are electrically connected with the electrode at the first end of the battery cell (1), and/or extend into the first connecting hole (32) and are electrically connected with the electrode at the second end of the battery cell (1).

2. The lithium battery module as claimed in claim 1, characterized in that the height of the protrusion (41) is greater than the length of the small aperture portion of the stepped hole (21) and the length of the first connection hole (32).

3. The lithium battery module as claimed in claim 2, characterized in that the top end of the protrusion (41) is provided with a flat surface, and the flat surface is attached to the electrode of the battery cell (1).

4. The lithium battery module as claimed in claim 3, characterized in that the projections (41) are welded to the electrodes of the battery cells (1).

5. The lithium battery module as claimed in claim 1, characterized in that the insulating fixing means (3) comprise a base (33), the limiting hole (31) being provided in the base (33).

6. Lithium battery module according to claim 5, characterized in that the base (33) is provided with ear plates (331) on both sides.

7. The lithium battery module as claimed in claim 5, characterized in that the insulating fixture (3) further comprises an insulating plate (34), the insulating plate (34) being fixedly connected to the outside of the base (33), the first connection hole (32) being provided on the insulating plate (34).

8. The lithium battery module as claimed in claim 5, further comprising a connecting assembly (5), wherein the insulation limiting member (2) and the insulation fixing device (3) are fixedly connected through the connecting assembly (5).

9. The lithium battery module as claimed in claim 8, characterized in that the connecting assembly (5) comprises a pull rod (51) and a screw (52), the pull rod (51) being provided with a threaded hole at a first end and an external thread at a second end;

a second connecting hole (22) is formed in the insulation limiting piece (2), and the screw (52) penetrates through the second connecting hole (22) and is connected to the first end of the pull rod (51) in a threaded mode;

the base (33) is provided with a threaded hole, and the second end of the pull rod (51) is in threaded connection with the threaded hole of the base (33).

10. The lithium battery module as claimed in claim 7, further comprising a cover plate (6), wherein the cover plate (6) is fixedly connected to the base (33) at a side away from the battery cell (1), and the cover plate (6) presses the insulating plate (34) and the bus bar (4) outside the insulating plate (34) onto the base (33).