CN210723206U

CN210723206U - Busbar subassembly, battery module and battery package

Info

Publication number: CN210723206U
Application number: CN201922120384.1U
Authority: CN
Inventors: 刘建华; 单小林; 张野
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-06-09
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to a power battery wraps technical field, provides a busbar subassembly, battery module and battery package. Busbar subassembly include support and two at least busbars, the support include with busbar quantity one-to-one just is used for the package to establish the correspondence the installed part of busbar, the installed part set up to can the butt in electric core with the installed part with inject between the electric core and hold the cavity of busbar. The utility model discloses a busbar subassembly is applicable to the use of no module battery package, can solve the insulating protection problem between electric core, do benefit to maintenance and use, this busbar subassembly can provide high-pressure protection to the busbar, reduce the battery package in assembly, use and maintenance process, the high pressure converges easily with personnel, the safe risk of instrument and other spare part contact, the setting through the support simultaneously provides insulating protection to closing on the busbar, avoid producing electric arc short circuit between two busbars and cause the incident.

Description

Busbar subassembly, battery module and battery package

Technical Field

The utility model relates to a power battery wraps technical field, in particular to busbar subassembly, battery module and battery package.

Background

With the improvement of the requirement on the energy density of the power battery pack, the assembly mode of the battery pack is newly changed, and in recent years, the whole battery pack is in the trend of a large module and no module scheme so as to meet the requirement on high energy density. In the no module scheme, the battery core is directly stacked and put into the lower shell of the battery pack, and the isolation plate and the module box in the single battery module are eliminated, so that the overall safety of the battery pack is reduced, specifically, the low safety is mainly embodied in the following two aspects, as shown in fig. 1 and 2:

(1) the high-voltage connecting bus bar 2 connected between the battery cores in the battery pack is lack of a necessary high-voltage protection device, and the high-voltage bus bar is easy to contact with personnel, tools and other parts in the assembling process, the using process and the maintenance process of the battery pack, so that a large safety risk exists;

(2) the distance between the bus bars 2 in the battery pack is short, and the short circuit is easily caused by the electric arc generated between the two bus bars 2 under the high-voltage condition, so that the safety accident is caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a can solve the insulating protection problem between the electric core, avoid producing busbar subassembly, battery module and battery package of electric arc short circuit between two busbars.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a busbar assembly comprises a support and at least two busbars, wherein the support comprises installation pieces which correspond to the busbars in a one-to-one mode and are used for wrapping the corresponding busbars, and the installation pieces are arranged to be capable of abutting against a battery cell to limit a cavity for accommodating the busbars between the installation pieces and the battery cell.

Optionally, each bus bar is provided with two alignment holes corresponding to the electrodes of the two adjacent connected battery cells.

Optionally, the mounting member is provided with an avoiding portion corresponding to the alignment hole so as to facilitate welding of the busbar.

Optionally, the avoiding part is circular, and the diameter of the avoiding part is larger than that of the alignment hole.

Optionally, a groove between the two alignment holes is formed in the busbar, the groove extends along a line perpendicular to the two alignment holes to be capable of being bent to adjust the distance between the two alignment holes, and a groove matched with the groove in shape is formed in the support.

Optionally, two adjacent mounting pieces are connected through a connecting rib; and/or

The support is a plastic support, and/or the busbar is an aluminum busbar.

Optionally, the mounting piece includes a plate body adapted to the shape of the busbar and an extending edge capable of abutting against the battery core, the extending edge is configured to extend in a direction perpendicular to the plate body, and the thickness of the extending edge is configured to be greater than that of the busbar.

The utility model discloses the second aspect provides a battery module, including at least two electric cores and a plurality of above-mentioned arbitrary schemes the busbar subassembly, every the busbar subassembly every the busbar with be located same adjacent two of being listed as the electric core links to each other.

Optionally, the number of the busbars in each busbar assembly corresponds to the number of the rows of the battery cells, and a plurality of the busbars in each busbar assembly are respectively connected to two adjacent battery cells in different rows.

The utility model discloses the third aspect provides a battery package, including last casing, lower casing and above-mentioned scheme the battery module.

Compared with the prior art, the busbar subassembly have the following advantage:

the utility model discloses a busbar subassembly is applicable to the use that does not have traditional module battery package, can solve the insulating protection problem between electric core, do benefit to maintenance and use, this busbar subassembly can provide high-pressure protection to the busbar, reduce the battery package in assembly, use and maintenance process, the high pressure converges easily with personnel, the safety risk of instrument and other spare part contact, the setting through the support simultaneously provides insulating protection to closing on the busbar, avoid producing electric arc short circuit between two busbars and cause the incident.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a battery module in the prior art;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view of a busbar assembly according to one embodiment of the present invention;

FIG. 4 is a rear view of the busbar assembly of FIG. 3;

FIG. 5 is an exploded view of the buss bar assembly of FIG. 3;

fig. 6 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

FIG. 7 is a partial schematic view of FIG. 6;

fig. 8 is a schematic structural diagram of a battery module according to another embodiment of the present invention.

Description of reference numerals:

1-support, 2-busbar, 3-installed part, 4-electric core, 5-counterpoint hole, 6-dodge portion, 7-recess, 8-splice bar, 9-plate body, 10-extension limit.

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

With reference to fig. 3-5, according to an aspect of the present invention, a busbar assembly is provided, including a support 1 and at least two busbars 2, the support 1 includes a mounting member 3 corresponding to the number one-to-one of the busbars 2 and used for covering the corresponding busbar 2, the mounting member 3 is configured to be capable of abutting against an electric core 4 to define a cavity between the mounting member 3 and the electric core 4 for accommodating the busbar 2.

The utility model discloses a busbar subassembly is applicable to the use that does not have traditional module battery package, has saved the design of module middle-end plate, curb plate and the busbar support that is located electric core top etc. In the assembling process, the busbar 2 is connected with the electrode of the battery core 4 in a welding mode, the mounting piece 3 is arranged outside the busbar 2 in a wrapping mode, a cavity for accommodating the busbar 2 is limited between the mounting piece and the outer wall of the battery core 4, and the mounting piece and the busbar are arranged correspondingly to provide independent protection for each busbar, so that high-voltage protection for the busbars can be realized, and the safety risk that the high-voltage busbar is easily contacted with personnel, tools and other parts in the assembling, using and maintaining processes of the battery pack is reduced; simultaneously, the adjacent busbars are subjected to insulation protection through the support, the insulation protection problem between the battery cores can be solved, the maintenance and the use are facilitated, and the safety accidents caused by electric arc short circuit between the two busbars are avoided.

It is understood that the bus bar 2 serves to connect two adjacent battery cells 4, and specifically, a plurality of bus bars 2 of the same bus bar assembly can be used to connect battery cells 4 located in the same column, and can also be used to connect battery cells 4 in different columns respectively. In order to fix the busbars 2 and the battery cells 4, each busbar 2 is provided with two alignment holes 5 corresponding to the electrodes of two adjacent connected battery cells 4. Wherein, the setting of counterpoint hole 5 is convenient for look over the positional relation of the two in electric core 4 and busbar 2 welding process, specifically, need to aim at counterpoint hole 5 and 4 utmost point posts of electric core and weld.

Furthermore, the mounting piece 3 is provided with an avoiding part 6 corresponding to the alignment hole 5 so as to facilitate the welding of the bus bar 2. The escape portion 6 is a through hole, and the through hole may be formed in any shape as long as the size is larger than the alignment hole 5. In the welding process, the mounting piece 3 is mounted on the bus bar 2, the alignment hole 5 is used as a center, and the area, limited on the bus bar 2, of the avoidance part 6 of the mounting piece 3 is used as a bus bar welding surface for welding the bus bar 2 and the battery cell 4 pole, so that the welding requirement of the bus bar 2 is met.

In the present embodiment, the relief portion 6 is circular, and the diameter of the relief portion 6 is larger than that of the alignment hole 5, so as to achieve stable welding.

Because electric core 4 arranges the in-process, positional deviation probably appears, and the inflation can appear after 4 times of charging and discharging of electric core are used in addition for the distance can increase between two electric core utmost point posts, leads to the alignment hole 5 of originally designed busbar 2 can't correspond with two adjacent electric core 4's utmost point posts accuracy easily, for solving above-mentioned problem, busbar subassembly need have flexible buffer function, specifically, be equipped with on the busbar 2 and be located two recess 7 between the alignment hole 5, recess 7 sets up to two along the perpendicular to the line extension of alignment hole 5 is in order can buckle and adjust two the distance between the alignment hole 5, be equipped with on the support 1 with recess 7 shape matched with recess to guarantee the suitability in support 1 and the assembly process of busbar 2. It is worth noting that during the assembly welding process, the grooves can be just opposite to the butt joints between the adjacent battery cells, so that the arrangement of the battery cells is not influenced.

In addition, in order to simplify the setting of support, satisfy the demand of protecting a plurality of busbar 2 simultaneously, adjacent two link to each other through splice bar 8 between the installed part 3, in this embodiment, splice bar 8 extends along the length direction of recess 7, and can set up many above-mentioned splice bar 8 to increase the steadiness of connecting between the installed part 3.

In order to protect the bus bar 2, the bracket 1 should be made of a composite material with excellent insulating property, and in order to achieve the bending adjustment of the groove 7 on the bracket 1, the bracket 1 should have certain toughness, specifically, the bracket 1 is a plastic bracket, and generally, the bus bar 2 is an aluminum bus bar. The bracket 1 and the busbar 2 are preferably manufactured in an integral injection moulding process.

It should be noted that, the mounting piece 3 and the bus bar 2 may be fixed together by clamping, gluing, welding, or the like, and after the fixing, the bus bar 2 is welded to the electric core 4 along the welding surface by using the alignment hole 5 of the bus bar 2. Wherein, installed part 3 can adopt arbitrary suitable shape, as long as can the butt protect busbar 2 in electric core 4 outer wall.

As one embodiment, the mounting member 3 includes a plate body 9 adapted to the shape of the bus bar 2 and an extending edge 10 capable of abutting against the battery cell 4, the extending edge 10 is configured to extend in a direction perpendicular to the plate body 9, and a thickness of the extending edge 10 is configured to be greater than a thickness of the bus bar 2, so as to reserve a sufficient space for the bus bar 2, facilitate placement of the bus bar 2, and protect the bus bar 2. The design of the extending edge 10 is equivalent to adding an insulating wall between the two busbars 2, providing side protection for the busbars 2, avoiding short circuit of the stroke caused by the contact of the tiny components with the busbars from the side edges of the busbars 2, and meanwhile, the area of the plate body 9 is set to be slightly larger than that of the busbars 2, further providing necessary high-voltage protection for the busbars 2.

With reference to fig. 6-8, a second aspect of the present invention provides a battery module, which includes at least two rows of battery cells 4 and a plurality of bus bar assemblies according to any of the above schemes, each of the bus bar assemblies is provided with a bus bar 2 connected to two adjacent battery cells 4 on the same row. The battery module of the utility model has the advantages of the bus bar assembly by adopting the bus bar assembly, and provides independent protection for each bus bar by arranging the mounting piece 3, thereby reducing the safety risk that the high-voltage bus bar is easy to contact with personnel, tools and other parts in the assembling, using and maintaining processes of the battery pack; simultaneously, the arrangement of the bracket provides insulation protection for the adjacent busbars, so that the insulation protection problem between the battery cores can be solved, and the safety accident caused by the short circuit of electric arcs between the two busbars is avoided.

Of course, electric core can adopt the optional mode to pile up in this battery module, the utility model discloses well busbar subassembly is applicable to arbitrary one and piles up the mode, and fig. 6 and 7 show for a plurality of electric cores 4 that pile up along vertical direction, and fig. 8 shows for a plurality of electric cores 4 that pile up along the horizontal direction, and it needs to notice that electric core 4 all is provided with two in fig. 6-8, in some other embodiments, can also set up multiseriate electric core 4. In addition, a plurality of busbars 2 in the same busbar assembly can be used to connect cells in the same column, and can also be used to connect cells in different columns.

With reference to fig. 6 and 7, the number of the busbars 2 in each busbar assembly corresponds to the number of the rows of the battery cells 4, and a plurality of the busbars 2 in each busbar assembly are respectively connected to two adjacent battery cells 4 in different rows. While fig. 8 shows a form in which a plurality of busbars 2 in each busbar assembly are connected to two adjacent battery cells 4 in the same column, of course, the arrangement of the busbar assembly in fig. 8 may be changed to connect battery cells 4 in different columns.

The utility model discloses the third aspect provides a battery package, including last casing, lower casing and above-mentioned scheme the battery module. This battery package is through adopting above-mentioned battery module, through the use of busbar subassembly for need not to set up parts such as end plate, curb plate and busbar support in the battery package, save the inner space of battery package, can play the guard action to electric core in the battery package simultaneously, thereby promoted the safety in utilization of battery package.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The busbar assembly is characterized by comprising a support (1) and at least two busbars (2), wherein the support (1) comprises installation pieces (3) which correspond to the busbars (2) in number in a one-to-one mode and are used for wrapping the corresponding busbars (2), and the installation pieces (3) can be abutted to electric cores (4) to limit cavities for accommodating the busbars (2) between the installation pieces (3) and the electric cores (4).

2. The busbar assembly according to claim 1, wherein each busbar (2) is provided with two alignment holes (5) corresponding to the electrodes of two adjacent cells (4) connected thereto, respectively.

3. The busbar assembly according to claim 2, wherein the mounting member (3) is provided with an escape portion (6) corresponding to the alignment hole (5) to facilitate welding of the busbar (2).

4. The busbar assembly according to claim 3, wherein the relief (6) is circular, the relief (6) having a diameter larger than the diameter of the alignment hole (5).

5. The busbar assembly according to claim 2, wherein a groove (7) is provided between the two alignment holes (5) on the busbar (2), the groove (7) is arranged to extend along a line perpendicular to the two alignment holes (5) so as to be bendable for adjusting the distance between the two alignment holes (5), and the bracket (1) is provided with a groove matching the shape of the groove (7).

6. The busbar assembly according to claim 1, wherein adjacent two of the mounting members (3) are connected by a connecting rib (8); and/or

The support (1) is a plastic support, and/or the busbar (2) is an aluminum busbar.

7. The busbar assembly according to claim 1, wherein the mounting member (3) comprises a plate body (9) adapted to the shape of the busbar (2) and an extending edge (10) capable of abutting against the battery cell (4), the extending edge (10) is arranged to extend in a direction perpendicular to the plate body (9), and the thickness of the extending edge (10) is arranged to be greater than that of the busbar (2).

8. A battery module, characterized in that it comprises at least two columns of cells (4) and a plurality of busbar assemblies according to any one of claims 1 to 7, each busbar (2) of each busbar assembly being connected to two adjacent cells (4) in the same column.

9. The battery module according to claim 8, wherein the number of the busbars (2) in each busbar assembly corresponds to the number of the columns of the battery cells (4) in a one-to-one manner, and a plurality of the busbars (2) in each busbar assembly are respectively connected with two adjacent battery cells (4) in different columns.

10. A battery pack comprising an upper case, a lower case, and the battery module according to claim 8 or 9.