CN116387761A

CN116387761A - Conductive sheet, busbar bracket, busbar mounting structure, battery module and battery

Info

Publication number: CN116387761A
Application number: CN202310586012.6A
Authority: CN
Inventors: 畅志远; 丁勇珂; 王文龙; 刘洋; 张海涛; 王霄远
Original assignee: China Aviation Lithium Battery Co Ltd
Current assignee: China Aviation Lithium Battery Co Ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-07-04

Abstract

The invention relates to the technical field of batteries, and provides a conducting strip, a busbar bracket, a busbar mounting structure, a battery module and a battery. The conducting strip includes the conducting strip body, the conducting strip body includes first connecting plate and second connecting plate, the angle of the angle that becomes between first connecting plate and the second connecting plate is greater than 0 and is less than 180, the face of first connecting plate is used for being parallel with the extending direction of the utmost point ear of battery cell, so that the utmost point ear can laminate and weld with the face of first connecting plate, the second connecting plate is used for with busbar fixed connection, and the second connecting plate is provided with location cooperation portion, be used for fixing a position the mounted position of conducting strip, guarantee the face of first connecting plate and the extending direction parallel of utmost point ear, thereby need not to buckle the utmost point ear, just can laminate and weld the face of utmost point ear and first connecting plate, the flatness error that the in-process produced has been avoided the utmost point ear to bend, welding quality has been improved, production efficiency has been improved simultaneously.

Description

Conductive sheet, busbar bracket, busbar mounting structure, battery module and battery

Technical Field

The invention relates to the technical field of batteries, in particular to a conducting strip, a busbar bracket, a busbar mounting structure, a battery module and a battery.

Background

In the related art, the series-parallel connection of the soft package unit cells is generally realized by the connection of the tabs and the bus bars. The existing connection mode is that the tab penetrates through the busbar provided with the slotted hole, then the tab is bent and attached to the busbar, welding is carried out, and then the busbar is electrically connected with the bent tab. This kind of connected mode needs to increase the tab process of bending, has not only reduced production efficiency, and the tab produces the flatness error in bending process easily moreover, leads to tab and busbar laminating not tight, reduces welding quality.

Disclosure of Invention

The invention provides a conductive sheet, a busbar bracket, a busbar mounting structure, a battery module and a battery, so as to improve welding quality and production efficiency.

In order to achieve the above purpose, the present invention provides the following technical solutions:

according to a first aspect of the present invention, there is provided a conductive sheet, including a conductive sheet body, the conductive sheet body includes a first connection plate and a second connection plate, an angle formed between the first connection plate and the second connection plate is greater than 0 ° and less than 180 °, a plate surface of the first connection plate is used for being parallel to an extending direction of a tab of a unit cell, so that the tab of the unit cell can be attached to and welded with the plate surface of the first connection plate, the second connection plate is used for being fixedly connected with a busbar, and the second connection plate is provided with a positioning mating portion for positioning a mounting position of the conductive sheet.

According to the conductive sheet provided by the invention, the positioning matching part is arranged on the second connecting plate, so that the mounting position of the conductive sheet can be positioned, the plate surface of the first connecting plate can be parallel to the extending direction of the lug of the single battery, and therefore, the lug can be attached and welded with the plate surface of the first connecting plate without bending the lug, the flatness error generated in the lug bending process is avoided, the problem that the lug is not tightly attached with the conductive sheet is further avoided, the welding quality is improved, and meanwhile, the lug bending procedure is omitted, and the production efficiency is improved. Because the angle formed between the first connecting plate and the second connecting plate is more than 0 degrees and less than 180 degrees, namely, the first connecting plate and the second connecting plate are not coplanar, the bus bar and the second connecting plate are convenient to fixedly connect, namely, the bus bar and the tab are not in the same plane, so that the assembly of the battery module is realized.

According to a second aspect of the present invention, there is provided a busbar bracket including a bracket body provided with a positioning portion and a mounting position for mounting the above-mentioned conductive sheet, the bracket body being provided with a positioning portion which cooperates with the positioning mating portion so that the conductive sheet is fixedly mounted at the mounting position and the plate surface of the first connection plate can be parallel to the extending direction of the tab of the unit cell.

According to the busbar bracket provided by the invention, the locating part and the installation position for installing the conducting strip are arranged on the bracket body, when the busbar bracket is used, the conducting strip is installed on the installation position through the matching of the locating part and the locating matching part, so that the plate surface of the first connecting plate can be parallel to the extending direction of the lug of the single battery, the lug is not required to be bent, the lug can be attached and welded with the plate surface of the first connecting plate, flatness errors generated in the lug bending process are avoided, the problem that the lug is not tightly attached with the conducting strip is avoided, the welding quality is improved, and meanwhile, the lug bending procedure is omitted, and the production efficiency is improved.

According to a third aspect of the present invention, there is provided a busbar mounting structure, including the above-mentioned conductive sheet and the above-mentioned busbar holder, wherein the positioning portion is matched with the positioning matching portion, so that the conductive sheet is fixedly mounted at the mounting position, and the plate surface of the first connection plate can be parallel to the extending direction of the tab of the unit cell.

According to the busbar mounting structure, the conducting strip and the busbar support are used, so that the lug can be attached to and welded with the plate surface of the first connecting plate without bending the lug, flatness errors generated in the lug bending process are avoided, the problem that the lug is not tightly attached to the conducting strip is avoided, welding quality is improved, and meanwhile, the lug bending process is omitted, and production efficiency is improved. When the bus bar is used, the conducting strip is installed on the installation position through the matching of the positioning part and the positioning matching part, so that the plate surface of the first connecting plate is parallel to the extending direction of the lug of the single battery, the lug is attached to the plate surface of the first connecting plate and welded, and then the bus bar is fixedly connected with the second connecting plate.

According to a fourth aspect of the present invention, there is provided a battery module, including a single battery, a bus bar, and the above-mentioned bus bar mounting structure, where the positioning portion is matched with the positioning matching portion, so that the conductive sheet is fixedly mounted on the mounting position, and the plate surface of the first connection plate can be parallel to the extending direction of the tab of the single battery, the tab of the single battery is attached to and welded with the first connection plate, and the bus bar is fixedly connected with the second connection plate.

According to the battery module provided by the invention, due to the adoption of the busbar mounting structure, the lug can be bonded and welded with the plate surface of the first connecting plate without bending the lug, so that the flatness error generated in the lug bending process is avoided, the problem of loose bonding of the lug and the conducting strip is avoided, the welding quality is improved, and meanwhile, the lug bending process is omitted, and the production efficiency is improved. When the battery module is used, the conducting strip is installed on the installation position through the cooperation of the positioning part and the positioning matching part, so that the plate surface of the first connecting plate is parallel to the extending direction of the lug of the single battery, the lug is attached to the plate surface of the first connecting plate and welded, and then the busbar is fixedly connected with the second connecting plate, so that serial-parallel connection of the single battery inside the battery module is realized.

According to a fifth aspect of the present invention, there is provided a battery including the battery module.

According to the battery provided by the invention, the quality and the production efficiency of the battery are improved due to the use of the battery module provided by the invention.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic structural diagram of a conductive sheet according to the present embodiment;

fig. 2 is a schematic structural diagram of the conductive sheet, the single battery and the bus bar according to the present embodiment;

fig. 3 is a schematic view of a first structure of a busbar bracket according to the present embodiment;

FIG. 4 is an enlarged view of a portion of the portion I of FIG. 3;

FIG. 5 is an enlarged view of a portion of the portion II of FIG. 3;

FIG. 6 is a schematic view of the bus bar bracket of FIG. 3 from another perspective;

fig. 7 is a schematic view of a second structure of the busbar bracket according to the present embodiment;

Fig. 8 is a schematic view of a third structure of the busbar bracket according to the present embodiment;

fig. 9 is a schematic view of a fourth structure of a busbar bracket according to the present embodiment;

fig. 10 is a schematic view of a fifth structure of the busbar bracket according to the present embodiment;

FIG. 11 is an exploded view of two adjacent bus bar brackets in the present embodiment;

fig. 12 is a schematic structural view of a busbar mounting structure according to the present embodiment;

fig. 13 is an exploded view of a busbar mounting structure and a battery provided in the present embodiment;

fig. 14 is a schematic structural view of a battery module according to the present embodiment;

fig. 15 is a partial enlarged view of the battery module provided in the present embodiment;

fig. 16 is an exploded view of a battery module (end plates not shown) provided in the present embodiment;

fig. 17 is a schematic view of a battery module provided in the present embodiment;

fig. 18 is a schematic diagram of the bus bar and the conductive sheet in the welded state in this embodiment.

The reference numerals are explained as follows:

10-conducting strips; 11-a first connection plate; 111-a first surface; 12-a second connection plate; 121-a first positioning groove; 122-a second positioning groove; 123-a second surface; 20-busbar brackets; 21-a stent body; 211-transverse plates; 212-vertical plate; 213-reinforcing rib plates; 214-side plates; 215-a first boss; 216-a second boss; 217-fixing buckle; 218-elastic snap; 2181-limit bump; 22-connecting part; 221-a projection; 222-limiting boss; 23-isolating plates; 30-single battery; 31-a first tab; 32-second pole ear; 40-bus bars; 50-end plates; 60-weld.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

In a first aspect, the present embodiment provides a conductive sheet 10. Referring to fig. 1 and 2, the present embodiment provides a conductive sheet 10, including a conductive sheet body, the conductive sheet body includes a first connection plate 11 and a second connection plate 12, an angle formed between the first connection plate 11 and the second connection plate 12 is greater than 0 ° and less than 180 °, a plate surface of the first connection plate 11 is used for being parallel to an extending direction of a tab of a unit cell 30, so that the tab of the unit cell 30 can be attached to and welded with the plate surface of the first connection plate 11, the second connection plate 12 is used for being fixedly connected with a busbar 40, and the second connection plate 12 is provided with a positioning matching portion for positioning an installation position of the conductive sheet 10.

The conducting strip 10 that this embodiment provided through set up location cooperation portion at the second connecting plate, can fix a position the mounted position of conducting strip, guarantees that the face of first connecting plate 11 can be parallel with the extending direction of battery cell 30's utmost point ear to need not to buckle the utmost point ear, just can laminate and weld the face of utmost point ear and first connecting plate 11, avoided the tab to bend the flatness error that the in-process produced, and then avoided tab and conducting strip laminating not tight problem, improved welding quality, simultaneously, owing to saved the tab process of bending, improved production efficiency. Since the angle formed between the first connection plate 11 and the second connection plate 12 is greater than 0 ° and less than 180 °, that is, the first connection plate 11 and the second connection plate 12 are not coplanar, the bus bars are conveniently and fixedly connected with the second connection plate 12, that is, the bus bars 40 and the tabs are not in the same plane, so that the battery module is assembled.

In this embodiment, the extending direction of the tab refers to the direction from the end close to the battery case to the end far from the battery case, and, for example, referring to fig. 2, the tab includes a first tab 31 and a second tab 32, and the extending direction of the first tab 31 is consistent with the extending direction of the second tab 32. The arrow direction M indicates the extending direction of the tab, and the surface of the tab is attached to and welded to the surface of the first connection plate 11 near the tab, so that the tab does not need to be bent, the flatness of the tab is easy to be ensured, and the welding defects such as cold welding and hollowness are not easy to occur. In addition, by welding the tab to the first connection plate 11 and welding the busbar 40 to the second connection plate 12, the busbar 40 is not required to be provided with slots, the large overcurrent area of the busbar is ensured, and a large current can be allowed to pass.

Illustratively, the location engaging portion includes location grooves provided at both ends of the second connecting plate 12. Specifically, referring to fig. 1, the positioning groove includes a first positioning groove 121 and a second positioning groove 122, the first positioning groove 121 being provided at one end of the second connection plate 12, the second positioning groove 122 being provided at the other end of the second connection plate 12.

In one embodiment, the conductive sheet 10 is made of metal, such as aluminum.

In one embodiment, referring to fig. 1, the conductive sheet 10 has an L-shaped bent plate shape, and an angle formed between the plate surface of the first connection plate 11 and the plate surface of the second connection plate 12 is 90 °.

Illustratively, the first connecting plate 11 and the second connecting plate 12 are integrally formed, which is convenient for processing and can improve the structural strength of the conductive sheet.

The joint of the first connecting plate 11 and the second connecting plate 12 is in smooth transition, so that stress concentration can be avoided, and the risk of cracking of the conductive segments is reduced.

The angle formed between the plate surface of the first connection plate 11 and the plate surface of the second connection plate 12 is 90 °, and after the tab is welded to the first connection plate 11 and the busbar 40 is welded to the second connection plate 12, the busbar 40 is perpendicular to the first tab and the second tab.

In one embodiment, referring to fig. 1, the first surface 111 of the first connection plate 11 is used to attach to and weld with the tab of the unit cell, and the second surface 123 of the second connection plate 11 is used to weld with the bus bar, wherein the first surface 111 and the second surface 123 smoothly transition. That is, the bus bars and tabs are welded to a continuously disposed surface that includes a first surface and a second surface, which in this embodiment are perpendicular.

In this embodiment, the electrical connection of the tab, the conductive member and the busbar is achieved by laser welding.

In this embodiment, the first surface of the first connecting plate is used for being attached to and welded with the tab of the unit cell, and the second surface of the second connecting plate is used for being welded with the busbar, so as to facilitate positioning of the conductive sheet by using the busbar bracket, and the structure of the busbar bracket will be described in detail below.

In a second aspect, the present embodiment provides a busbar bracket 20. Referring to fig. 3 to 11, the bus bar bracket 20 includes a bracket body 21, the bracket body 21 is provided with a positioning portion and a mounting position for mounting the conductive tab 10 provided in this embodiment, the bracket body 21 is provided with a positioning portion, and the positioning portion is matched with the positioning matching portion, so that the conductive tab 10 is fixedly mounted at the mounting position, and the plate surface of the first connection plate 11 can be parallel to the extending direction of the tab of the unit cell 30.

The busbar support 20 that this embodiment provided through set up location portion and be used for installing the installation position of conducting strip 10 that this embodiment provided on the support body, when using, through the cooperation of location portion and location cooperation portion, install conducting strip 10 on the installation position for the face of first connecting plate 11 can be parallel with the extending direction of the utmost point ear of battery cell 30, thereby need not to buckle the utmost point ear, just can laminate and weld the face of utmost point ear and first connecting plate 11, the flatness error that the in-process produced is bent to the utmost point ear has been avoided, thereby the problem that the laminating of utmost point ear and conducting strip is not tight has been avoided, welding quality has been improved, simultaneously, owing to saved the utmost point ear process of bending, production efficiency has been improved.

In one embodiment, referring to fig. 3, the bracket body 21 includes an elongated plate body structure, and exemplary, the elongated plate body structure includes a transverse plate 211 and two vertical plates 212, the two vertical plates 212 are fixedly connected to two sides of the transverse plate 211, a reinforcing rib plate 213 is disposed between the two vertical plates 212, and the reinforcing rib plate 213 is located below the installation position and is used for supporting the conductive sheet. Both ends of the strip-shaped plate body structure are provided with connecting parts 22, and the connecting parts 22 are provided with channels for the fasteners to pass through so as to fixedly connect the plurality of bus bar brackets 20 together.

Illustratively, the connecting portion 22 and the bracket body 21 are integrally formed, so that not only is the production and processing convenient, but also the overall structural strength of the busbar bracket 20 can be improved, thereby ensuring that the conductive sheet 10 can be fixed firmly and further improving the safety of the battery module.

In one embodiment, referring to fig. 3 and 11, one side of the connection part 22 is provided with a protrusion 221, and in two adjacent bus bar brackets 20, the protrusion 221 of one bus bar bracket 20 can be limited in the channel of the connection part 22 of the other bus bar bracket 20.

For example, when the number of the bus bar brackets 20 is plural, the plural bus bar brackets 20 are fixedly connected together using fasteners such as bolts and nuts. The protruding portion 221 is annular or open annular, and the protruding portion 221 may be a hollow cylindrical structure, and an inner cavity of the hollow cylindrical structure is communicated with the channel, and of course, the protruding portion 221 may also be a hollow prismatic structure. Referring to fig. 6 and 11, the protrusion 221 protrudes from one end of the connection portion 22, and the inner wall of the channel is provided with a limit boss 222 for abutting with the end of the protrusion 221 on the adjacent busbar bracket 20. Illustratively, long bolts are used through the passages of the connection portions 22 on each of the buss bar brackets 20 and then mate with nuts to fixedly connect all of the buss bar brackets 20 together.

In one embodiment, as shown in fig. 13, the number of the mounting positions is two, and each mounting position is provided with one conductive sheet 10, wherein one conductive sheet 10 is used for being connected with a first tab 31 of a single battery 30, and the other conductive sheet 10 is used for being connected with a second tab 32 of the single battery 30, and the polarities of the first tab 31 and the second tab 32 are opposite.

The polarity of the first tab 31 is an anode, and the polarity of the second tab 32 is a cathode. The first tab 31 and the second tab 32 are led out from the same side of the unit cell 30, so that the conductive sheet is connected with the tab.

In this embodiment, two mounting positions are disposed at intervals along the length direction of the bracket body 21, that is, two mounting positions are disposed at intervals along the length direction of the transverse plate 211. Specifically, as shown in fig. 3 and 5, two side plates 214 are provided at positions between both ends of the lateral plate 211, one of the side plates 214 and the connecting portion 22 adjacent thereto and the vertical plate 212 located between the side plate 214 and the connecting portion 22 define one mounting position, and the other side plate 214 and the connecting portion 22 adjacent thereto and the vertical plate 212 located between the other side plate 214 and the connecting portion 22 define the other mounting position.

Illustratively, the height of the connecting portion 22 is higher than that of the vertical plates 212, positioning portions may be provided on the side walls of the connecting portion 22 and the side plates 214 of the bracket body 21, positioning mating portions are provided on the second connecting plate 12, and after assembly, as shown in fig. 12, the second connecting plate 12 is located above the mounting position, and the first connecting plate 11 is located on a side of one of the vertical plates 212 away from the other vertical plate 212.

In one embodiment, the positioning portion includes a positioning boss, the positioning mating portion includes a positioning groove, and the positioning boss is clamped in the positioning groove to limit movement of the conductive sheet 10 along a first direction and a second direction, where the first direction is parallel to a length direction of the conductive sheet 10, and the second direction is parallel to a width direction of the positioning groove.

Referring to fig. 12, an arrow direction X indicates a first direction, and an arrow direction Y indicates a second direction. When installing the conducting strip, can follow the upper and lower installation position of support body 21 with the conducting strip, when the installation, aim at the location boss with the constant head tank, then move the conducting strip to the direction that is close to support body 21 until second connecting plate 12 is located the installation position, at this moment, because the cooperation of location boss and constant head tank, the conducting strip can't remove in first direction and second direction, the position of conducting strip obtains preliminary fixed.

In one embodiment, the positioning boss includes a first boss 215 and a second boss 216, the first boss 215 and the second boss 216 being disposed opposite in the first direction.

In the present embodiment, as shown in fig. 3 to 5, the first boss 215 is provided on the side wall of the connecting portion 22, the second boss 216 is provided on the side plate 214 of the bracket, and the first boss 215 and the second boss 216 are oppositely provided in the first direction.

In this embodiment, the first boss 215 and the second boss 216 are disposed, so that not only the position of the conductive sheet 10 can be initially fixed, but also the laser welding position can be positioned, specifically, when the busbar 40 is welded, the positions of the first boss 215 and the second boss 216 are easily recognized by the vision system of the laser welding device, so that the welding position is automatically recognized, the automation of laser welding is realized, and the welding efficiency and the yield are improved, as shown in fig. 18. The connection line between the first boss 215 and the second boss 216 is the weld 60.

In one embodiment, to further fix the position of the conductive sheet 10, the positioning portion further includes a buckle, as shown in fig. 5, having a limiting protrusion 2181, where the limiting protrusion 2181 can abut against a surface of the second connection plate 12 away from the unit cell 30 to limit the movement of the conductive sheet 10 in a third direction, where the third direction is perpendicular to the first direction and the second direction.

Referring to fig. 12, an arrow direction Z indicates a third direction. Specifically, after the conductive sheet 10 is mounted in place, the limiting boss 222 abuts against a surface of the second connecting plate 12 away from the unit cell 30, so that the second connecting plate 12 is pressed and fixed on the mounting position to limit movement of the conductive sheet 10 in the arrow direction Z.

In one embodiment, the bracket body 21 is provided with two mounting positions, each of which is provided with a positioning boss and a buckle; the snap comprises an elastic snap 218 and a fixing snap 217, the elastic snap 218 and the fixing snap 217 being arranged opposite in a first direction.

One of the mounting positions will be described as an example.

Specifically, referring to fig. 3 to 5 and 12, the positioning boss includes a first boss 215 and a second boss 216, the first boss 215 and the fixing buckle 217 are both disposed on a side wall of the connecting portion 22, the second boss 216 is disposed on a side plate 214 of the bracket, the elastic buckle 218 and the second boss 216 are located on the same side of the mounting position, wherein, in order to achieve elastic deformation of the elastic buckle 218, one end of the elastic buckle 218 away from the limit boss 2181 is connected with the transverse plate 211, when the conductive sheet 10 moves downward from the upper side of the bracket body 21 and passes through the limit bosses 2181 of the fixing buckle 217 and the elastic buckle 218, the elastic buckle 218 can be elastically deformed, so that the second connecting plate 12 can move below the limit boss 2181, when the conductive sheet is mounted in place, i.e. after the second connecting plate 12 abuts against the mounting position, the elastic buckle 218 is restored to the fixing buckle 217 and the limit boss 2181 of the elastic buckle 218 abut against the surface of the second connecting plate 12 away from the single battery 30, so as to press and fix the second connecting plate 12 on the mounting position; meanwhile, the first boss 215 and the second boss 216 are respectively matched with the corresponding positioning grooves, so that the conductive sheet 10 cannot displace in the first direction, the second direction and the third direction, and the fixing firmness of the conductive sheet 10 is ensured.

In one embodiment, the busbar bracket 20 further includes a spacer plate 23; the isolation plate 23 is positioned at one side of the bracket body 21; the number of mounting locations is two, at least one of which is provided with a spacer plate 23. The bracket body 21 has a first long side and a second long side which are oppositely arranged, wherein the first long side is a side of the bracket body 21 away from the protruding portion 221, and the second long side is a side of the bracket body 21 close to the protruding portion 221. The partition plate 23 is located on the first long side. The partition plate 23 is integrally formed with the holder body 21. Specifically, the isolation plate 23 is integrally provided with one of the vertical plates, and illustratively, the isolation plate 23 is integrally provided with the vertical plate away from the protrusion 221, and the isolation plate 23 may be coplanar with the vertical plate.

Specifically, the busbar bracket 20 provided in the present embodiment mainly has five forms:

referring to fig. 3, the first is that two mounting positions of the bracket body 21 are provided with one isolation plate 23, and the two isolation plates 23 are located on the same side of the bracket body 21;

referring to fig. 7, the second is a bus bar bracket 20 provided with no partition plate 23;

referring to fig. 8, a third is that one installation position of the stand body 21 is provided with a partition plate 23, and the partition plate 23 is located at a first long side of the stand body 21;

Referring to fig. 9, the fourth is that another mounting position of the stand body 21 is provided with a partition plate 23, and the partition plate 23 is located at the first long side of the stand body 21.

Referring to fig. 10, the fifth is the busbar holder 20 without the partition plate 23, and at the same time, the transverse plate thereof is provided with mounting holes for mounting the module collection harness connector, the mounting holes being located between two mounting positions.

To facilitate the selection of the desired form of the bus bar bracket 20, the five forms of the bus bar bracket 20 may be numbered A, B, C, D, E in sequence. The number may be integrally formed with the bracket body 21 at the time of manufacturing the bus bar bracket 20, or may be marked on the bus bar bracket 20 by labeling or the like at a later stage. The form of the number is not limited to A, B, C, D, E and other letters, but may be a number or other symbol. Of course, no number may be formed on the bus bar bracket.

The bus bar brackets with the numbers A and E are respectively connected with the outermost single batteries, and the bus bar brackets with the numbers B, C, D are arranged according to a certain number and distribution sequence, so that the alternately arranged mounting areas for mounting the bus bars can be formed on the upper part of the battery module. Since each single battery corresponds to one busbar bracket, the area surrounded by the busbar brackets may contain any number of single batteries, i.e. the busbar brackets may be combined to form any series-parallel module, for example, fig. 17 shows a 1P16S battery module, i.e. the battery module includes 16 single batteries connected in series. Therefore, the battery module with any serial-parallel connection mode can be combined by only designing and developing three types of bus bar brackets except for the bus bar brackets with the two relatively fixed outermost modes, and the design and development period and the design and development cost of the module are greatly reduced.

Of course, the form of the busbar bracket is not limited to the above five, and other forms of busbar brackets can be selected according to actual production and processing requirements.

In this embodiment, the positioning boss, the buckle and the bracket body 21 are integrally formed.

In one embodiment, the bus bar bracket 20 is made of plastic. For example, engineering plastic alloys (pc+abs), polycarbonate (PC), or a composite of polyimide and glass fiber, etc.

In a third aspect, the present embodiment provides a busbar mounting structure. Referring to fig. 12, the bus bar mounting structure includes the conductive sheet 10 provided in the present embodiment and the bus bar bracket 20 provided in the present embodiment, and the positioning portion is matched with the positioning matching portion, so that the conductive sheet 10 is fixedly mounted at the mounting position, and the plate surface of the first connection plate 11 can be parallel to the extending direction of the tab of the unit cell 30.

The busbar mounting structure that this embodiment provided owing to used conducting strip 10 and busbar support 20 that this embodiment provided, need not to buckle the utmost point ear, just can laminate and weld the face of utmost point ear and first connecting plate 11, has avoided the flatness error that the utmost point ear produced in the bending process to avoid the utmost point ear to laminate with the conducting strip not tight problem, improved welding quality, simultaneously, owing to saved the utmost point ear process of bending, improved production efficiency. When the bus bar is used, the conductive sheet is installed on the installation position through the matching of the positioning part and the positioning matching part, so that the plate surface of the first connecting plate 11 is parallel to the extending direction of the tab of the single battery 30, the tab is attached to the plate surface of the first connecting plate 11 and welded, and then the bus bar is fixedly connected with the second connecting plate 12.

In one embodiment, the positioning boss includes a first boss 215 and a second boss 216, the first boss 215 and the second boss 216 being disposed opposite in a first direction; the positioning matching part comprises a positioning groove, the positioning groove comprises a first positioning groove 121 and a second positioning groove 122, and the first positioning groove 121 and the second positioning groove 122 are oppositely arranged along the length direction of the second connecting plate 12; the first boss 215 is clamped to the first positioning groove 121, and the second boss 216 is clamped to the second positioning groove 122 to limit the movement of the conductive sheet 10 along the first direction and the second direction, wherein the first direction is parallel to the length direction of the conductive sheet 10, and the second direction is parallel to the width direction of the positioning groove.

Referring to fig. 12, an arrow direction X indicates a first direction, and an arrow direction Y indicates a second direction. When the conductive sheet 10 is mounted, the conductive sheet 10 may be mounted on the mounting position from the upper side of the bracket body 21 downward, and when the conductive sheet is mounted, the first positioning groove 121 is aligned with the first boss 215, the second positioning groove 122 is aligned with the second boss 216, and then the conductive sheet 10 is moved toward the direction close to the bracket body 21 until the second connecting plate 12 is located on the mounting position, at this time, the position of the conductive sheet 10 is primarily fixed due to the mutual engagement of the first boss 215 and the first positioning groove 121 and the mutual engagement of the second boss 216 and the second positioning groove 122.

Referring to fig. 12, a first boss 215 is provided on a side wall of the connection portion 22, a second boss 216 is provided on a side plate 214 of the bracket body, and the first boss 215 and the second boss 216 are oppositely disposed in a first direction.

In this embodiment, the first boss 215 and the second boss 216 are disposed, so that not only the position of the conductive sheet 10 can be initially fixed, but also the laser welding position can be positioned, specifically, when the busbar is welded, the positions of the first boss 215 and the second boss 216 are easily recognized by the vision system of the laser welding device, so that the welding position is automatically recognized, the automation of laser welding is realized, and the welding efficiency and the yield are improved.

In one embodiment, the number of the bus bar holders 20 is plural, and the plurality of bus bar holders 20 are arranged in the stacking direction of the unit cells 30 such that a portion of the plurality of bus bar holders 20 and the second connection plates 12 on the plurality of bus bar holders 20 together form a mounting area for mounting the bus bars.

Specifically, as shown in fig. 6 to 9, each of the unit cells 30 is provided with one bus bar bracket 20, and the form of the bus bar bracket 20 corresponding to each of the unit cells may be one of four forms (corresponding numbers are A, B, C, D, respectively) according to need, a portion of the bus bar bracket 20 includes a partition plate 23 and a side wall of the connecting portion 22 provided with a positioning protrusion, and also includes a side plate 214 of the bracket body 21, the portion and the second surface of the second connecting plate 12 in the area surrounded by the portion together form a mounting area for mounting the bus bar, the lower part of the mounting area contains a set number of unit cells 30, and the bus bar connects the set number of unit cells 30 together through conductive sheets, so that battery modules in different serial-parallel forms can be realized.

Referring to fig. 3 to 5 and 15, the spacer plate 23 and the positioning projections provided to the connecting portion 22 and the side plate 214 together achieve mounting positioning of the bus bar 40. In addition, the isolation plate 23 can also insulate and isolate two adjacent bus bars, and prevent the two adjacent bus bars from being in contact with a short circuit.

In a fourth aspect, the present embodiment provides a battery module. Referring to fig. 14 to 16, the battery module includes a single battery 30, a bus bar 40, and a bus bar mounting structure provided in this embodiment, where the positioning portion is matched with the positioning matching portion, so that the conductive sheet is fixedly mounted on the mounting position, and the plate surface of the first connecting plate can be parallel to the extending direction of the tab of the single battery, the tab of the single battery 30 is attached to and welded with the first connecting plate 11, and the bus bar is fixedly connected with the second connecting plate 12.

The battery module that this embodiment provided, owing to used the busbar mounting structure that this embodiment provided, need not to buckle the utmost point ear, just can laminate and weld the face of utmost point ear and first connecting plate 11, avoided the flatness error that the utmost point ear in-process produced to avoid the utmost point ear to laminate with the conducting strip not tight problem, improved welding quality, simultaneously, owing to saved the utmost point ear process of bending, improved production efficiency. When the battery module is used, the plate surface of the first connecting plate 11 is parallel to the extending direction of the lug of the single battery 30, the lug is attached to the plate surface of the first connecting plate 11 and welded, and then the busbar is fixedly connected with the second connecting plate 12, so that the serial-parallel connection of the single battery 30 in the battery module is realized.

In one embodiment, the number of the single cells 30 is plural, and the number of the bus bar holders 20 is equal to the number of the single cells 30. That is, each of the unit cells 30 is provided with one of the bus bar holders 20, and the form of the bus bar holders 20 on each of the unit cells 30 may be the same or different.

In one embodiment, among the plurality of bus bar holders 20, a portion of the bus bar holders 20 includes a holder body 21 and a partition plate 23, the partition plate 23 is mated with the holder body 21 to form a plurality of mounting areas, and the bus bars 40 are mounted in the mounting areas so that the plurality of unit cells 30 are connected in series-parallel.

Specifically, when the busbar holder 20 is in the form of A, C or D, the busbar holder 20 includes the holder body 21 and the partition plate 23, and when the busbar holder 20 is in the form of B, the busbar holder 20 does not include the partition plate 23.

For example, referring to fig. 17, for the battery module of 1P16S, the plurality of bus bar holders 20 are in the form of A, C, D, C, D, C, D, C, D, C, D, C, D, C, D and the end-positioned bus bar holders 20 with the number E in order from left to right.

In one embodiment, the battery module further includes a fastener coupled to the plurality of bus bar brackets 20 to fixedly couple the plurality of bus bar brackets 20 together. Illustratively, the fastener includes a long bolt and a nut, one side of the connection portion 22 is provided with a protrusion 221, and in two adjacent busbar brackets 20, the protrusion 221 of one busbar bracket 20 can be limited in the channel of the connection portion 22 of the other busbar bracket 20. Long bolts are used to pass through the passages of the connection portions 22 on each of the bus bar brackets 20 and then are engaged with nuts to fixedly connect all the bus bar brackets 20 together.

The battery module provided in this embodiment can be applied to various models of vehicles.

In this embodiment, the unit cell 30 is a soft pack lithium battery.

The unit cell 30 includes a cell and an electrolyte, the cell is disposed in a cell housing, and for a soft-pack lithium battery, the cell housing is an aluminum-plastic film coated on the outer surface of the cell. The battery cell may be a laminated battery cell having a first pole piece, a second pole piece, and a separator therebetween, wherein the polarities of the first pole piece and the second pole piece are opposite. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged.

In one embodiment, the battery module further includes an end plate 50, and the end plate 50 is used to fix the plurality of unit batteries 30. A cushion may be provided between adjacent unit cells 30, and a cushion may be provided between the end plate 50 and the unit cells 30.

In a fifth aspect, the present embodiment provides a battery, including the battery module provided in the present embodiment.

The battery provided by the embodiment improves the quality and the production efficiency of the battery due to the use of the battery module provided by the embodiment.

In one embodiment, the battery further comprises a case, and the battery module is disposed in the case. Through setting up battery module in the box, can realize the protection to battery module. The battery module may be preloaded by a strap or other structure prior to placement in the case, and the strap is sheared and removed after the battery module is installed in place and secured to the bottom plate of the case.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The utility model provides a conducting strip, its characterized in that includes the conducting strip body, the conducting strip body includes first connecting plate and second connecting plate, first connecting plate with the angle that becomes between the second connecting plate is greater than 0 and is less than 180, the face of first connecting plate be used for with the extending direction parallel of the utmost point ear of monomer battery, so that the utmost point ear of monomer battery can with the face laminating of first connecting plate and welding, the second connecting plate is used for with busbar fixed connection, just the second connecting plate is provided with location cooperation portion, be used for right the mounted position of conducting strip is fixed a position.

2. The conductive sheet of claim 1, wherein a first surface of the first connecting plate is configured to attach to and weld with a tab of the unit cell, and a second surface of the second connecting plate is configured to weld with a busbar, and wherein the first surface and the second surface smoothly transition.

3. The conductive sheet according to claim 1, wherein the conductive sheet has an L-shaped bent plate shape, and an angle formed between the plate surface of the first connection plate and the plate surface of the second connection plate is 90 °.

4. The busbar support is characterized by comprising a support body, wherein the support body is provided with a positioning part and a mounting position for mounting the conducting strip according to any one of claims 1 to 3, the support body is provided with a positioning part, and the positioning part is matched with the positioning matching part, so that the conducting strip is fixedly mounted at the mounting position, and the plate surface of the first connecting plate can be parallel to the extending direction of the lug of the single battery.

5. The bus bar bracket according to claim 4, wherein the positioning portion comprises a positioning boss, the positioning mating portion comprises a positioning groove, and the positioning boss is clamped to the positioning groove to limit movement of the conductive sheet in a first direction and a second direction, wherein the first direction is parallel to a length direction of the conductive sheet, and the second direction is parallel to a width direction of the positioning groove.

6. The buss bar support of claim 5, wherein the positioning boss comprises a first boss and a second boss, the first boss and the second boss being disposed opposite in the first direction.

7. The buss bar bracket of claim 5, wherein the positioning portion further comprises a catch having a limit protrusion that is capable of abutting a surface of the second connection plate that is remote from the cell to limit movement of the conductive sheet in a third direction, wherein the third direction is perpendicular to the first and second directions.

8. The bus bar bracket of claim 5, wherein the number of mounting locations is two, each mounting location is provided with one conductive sheet, one conductive sheet is used for being connected with a first tab of a single battery, and the other conductive sheet is used for being connected with a second tab of the single battery, wherein the polarities of the first tab and the second tab are opposite.

9. The busbar bracket of claim 8, wherein each of the mounting locations is provided with a locating boss and a catch; the buckle comprises an elastic buckle and a fixed buckle, and the elastic buckle and the fixed buckle are oppositely arranged along the first direction.

10. The busbar bracket of any one of claims 4 to 9, further comprising a partition plate located at one side of the bracket body;

the number of the installation positions is two, and at least one installation position is provided with the isolation plate.

11. The bus bar bracket according to any one of claims 4 to 9, wherein the bracket body comprises an elongated plate structure, both ends of the elongated plate structure being provided with connection portions, the connection portions being provided with passages for passing fasteners to fixedly connect a plurality of the bus bar brackets together.

12. The bus bar bracket according to any one of claims 11, wherein one side of the connection portion is provided with a protrusion, and the protrusion of one of the bus bar brackets can be limited in the passage of the connection portion of the other bus bar bracket in two adjacent bus bar brackets.

13. A busbar mounting structure, characterized by comprising the conductive sheet of any one of claims 1 to 3 and the busbar holder of any one of claims 4 to 12, the positioning portion being engaged with the positioning engaging portion so that the conductive sheet is fixedly mounted at the mounting position and the plate surface of the first connection plate can be parallel to the extending direction of the tab of the unit cell.

14. The busbar mounting structure of claim 13, wherein the positioning portion includes a positioning boss including a first boss and a second boss, the first boss and the second boss being disposed opposite in a first direction;

the positioning matching part comprises a positioning groove, wherein the positioning groove comprises a first positioning groove and a second positioning groove, and the first positioning groove and the second positioning groove are oppositely arranged along the length direction of the second connecting plate;

The first boss is clamped in the first positioning groove, the second boss is clamped in the second positioning groove to limit the conductive sheet to move along a first direction and a second direction, wherein the first direction is parallel to the length direction of the conductive sheet, and the second direction is parallel to the width direction of the positioning groove.

15. The bus bar mounting structure according to claim 13, wherein the number of the bus bar brackets is plural, and the plurality of the bus bar brackets are arranged in the stacking direction of the unit cells such that a part of the plurality of bus bar brackets and the second connection plates on the plurality of the bus bar brackets together form a mounting area for mounting the bus bar.

16. The bus bar mounting structure of claim 13, wherein the conductive sheet is metal and the bus bar bracket is plastic.

17. The battery module is characterized by comprising a single battery, a bus bar and the bus bar mounting structure of any one of claims 13 to 16, wherein the positioning part is matched with the positioning matching part, so that the conductive sheet is fixedly mounted on the mounting position, the plate surface of the first connecting plate can be parallel to the extending direction of the lug of the single battery, the lug of the single battery is attached to the first connecting plate and welded, and the bus bar is fixedly connected with the second connecting plate.

18. The battery module of claim 17, wherein a first surface of the first connecting plate is attached to and welded to the tab of the unit cell, and a second surface of the second connecting plate is welded to the busbar, and wherein the first surface and the second surface smoothly transition.

19. The battery module according to claim 17 or 18, wherein the number of the single cells is plural, and the number of the bus bar holders is equal to the number of the single cells.

20. The battery module of claim 19, wherein a portion of the buss bar holders include a holder body and a separator that cooperates with the holder body to form a plurality of mounting areas, and the buss bars are mounted in the mounting areas to connect the plurality of battery cells in series-parallel.

21. The battery module of claim 19, further comprising a fastener coupled to a plurality of the buss bar brackets to fixedly couple the plurality of buss bar brackets together.

22. A battery comprising the battery module of any one of claims 17 to 21.