Battery pole connecting assembly and battery thereof

Abstract

The utility model relates to a battery pole connecting assembly and a battery thereof, the battery pole connecting assembly is connected with electrode assemblies of a battery monomer, the two electrode assemblies are convexly arranged on the same side of a top cover of the battery monomer along a first direction, and the battery pole connecting assembly comprises a bar piece, a connecting piece and a connecting piece, the chip is detachably clamped on one side of a part of the electrode assembly along the first direction, so that the chip is electrically connected with the electrode assembly; the pressing piece is arranged on one side of the bar piece in the first direction and used for applying force to the bar piece in the gravity direction so as to press the bar piece and the electrode assembly; according to the utility model, the chip is clamped on the electrode assembly from top to bottom to realize electric connection, and the chip is detachably connected with the battery cell pole, so that the overall assembly process is simplified, the overall assembly efficiency is improved, and the phenomenon of waste protection of the battery pack is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field especially is a kind of battery pole post connecting assembly and its battery. BACKGROUND

[0002] At present, in the battery pack design, many cases will adopt the way of welding tab and cell pole post to realize the transmission of electric energy from cell to external circuit, however, cell after welding tab and pole post faces the problem of not being detachable and inconvenient to replace and maintain, and in the process of welding, there are also problems such as tab and pole post positioning difficulty, welding process complexity, which affects the assembly efficiency, and the welding process is prone to problems such as tab and pole post with air hole, protrusion after welding, which leads to the quality of welding cannot be guaranteed;For large battery pack, even in the welding process, it will also appear that the tab is welded through, resulting in the whole battery pack is wasted, causing unnecessary loss;In addition, the welding process has higher requirements for the automation of equipment. SUMMARY

[0003] Therefore, the utility model wants to overcome the problem that tab and pole post are not detachable after welding in the prior art, the welding process is complex, and the tab is easily welded through, resulting in the whole battery pack is wasted, and further provide a battery pole post connecting assembly, realize the detachable connection of tab and cell pole post, simplify the overall assembly process, improve the overall assembly efficiency, and also avoid the phenomenon of battery pack waste.

[0004] To solve the above technical problems, the utility model provides a kind of battery pole post connecting assembly, it is connected with the electrode assembly of battery monomer, two described electrode assemblies are along the same side of the top cover of the battery monomer and protrude in the first direction, the battery pole post connecting assembly includes,

[0005] tab, it is detachably connected to the side of part of the electrode assembly along the first direction, so that the tab is electrically connected with the electrode assembly;

[0006] pressing part, it is arranged on the side of the tab along the first direction, and it is used to force the tab along the direction of gravity to press the tab and the electrode assembly.

[0007] In an embodiment of the utility model, the electrode assembly has a shoulder portion and a plurality of pole post portions spaced apart on the shoulder portion along a second direction;Each of the tabs has a plurality of insertion slots spaced apart along the second direction, and the pole post portions are respectively inserted into the insertion slots.

[0008] In an embodiment of the utility model, the plug groove is a groove structure, the plug groove comprises a bottom wall and side walls connected to both sides of the bottom wall, the baffle further comprises a connecting portion connected to the plug groove, the connecting portion connects the side walls of two adjacent plug grooves and is connected to the shoulder portion.

[0009] In an embodiment of the utility model, the side wall of the plug groove is provided with a plurality of elastic sheets arranged at intervals along a third direction so that there is a deformation gap between two adjacent elastic sheets.

[0010] In an embodiment of the utility model, the middle part of two oppositely arranged elastic sheets is inwardly recessed to form a clamping portion, and two oppositely arranged clamping portions are used for elastically clamping the pole portion;

[0011] The free end of the elastic sheet and the connecting portion are provided with a curved guide portion.

[0012] In an embodiment of the utility model, the battery pole connecting assembly further comprises an FPC assembly and an insulating heat-conducting spacer, a plurality of baffle sheets are arranged at intervals along a third direction and connected to both sides of the FPC assembly, and the insulating heat-conducting spacer is connected to one side of the baffle sheet along the first direction and covers the FPC assembly.

[0013] In an embodiment of the utility model, the insulating heat-conducting spacer is provided with a spacer plate and a plurality of avoiding holes located on both sides of the spacer plate along the second direction, the spacer plate abuts against the FPC assembly along the first direction, and the baffle sheet is exposed through the avoiding hole.

[0014] In an embodiment of the utility model, the insulating heat-conducting spacer is further provided with a plurality of first grooves arranged in sequence along the second direction, the opening end of the first groove faces the baffle sheet and corresponds to the position of the plug groove, and when the baffle sheet is connected to the insulating heat-conducting spacer, the plug groove is accommodated into the first groove;

[0015] A second groove is formed between two adjacent first grooves and on the side away from the baffle sheet, the second groove is communicated with the avoiding hole, and the second groove is used for accommodating the pressing piece so that the pressing piece abuts against part of the baffle sheet.

[0016] In an embodiment of the utility model, the setting mode of the pressing piece at least comprises one or a combination of the following modes:

[0017] The spacer plate is a recessed structure, the pressing piece is embedded in the spacer plate and located between two baffle sheets; or,

[0018] The pressing member is embedded in the second groove and is located at two sides of the insulating and heat-conducting isolation member at intervals along the second direction; or,

[0019] The pressing member is connected to a side of the first groove facing away from the tab along the first direction and is located in the middle of the tab.

[0020] A battery is also provided, comprising:

[0021] Box;

[0022] A battery cell, wherein a plurality of the battery cells are arranged in an array in the box; the battery cell comprises a top cover and an electrode assembly protruding along a first direction on the same side of the top cover;

[0023] as well as,

[0024] The battery pole connection assembly;

[0025] The tab of the battery pole connecting assembly is detachably connected to the electrode assembly to achieve electrical connection between the battery pole connecting assembly and the electrode assemblies of the plurality of battery cells.

[0026] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0027] The battery pole connection assembly described in the present invention is such that when the battery cell is upright, the tab is clamped onto the electrode assembly from top to bottom, so that the tab and the electrode assembly can be detachably connected on the basis of achieving electrical connection, which not only simplifies the assembly process and improves assembly efficiency, but also facilitates later replacement and maintenance; after the tab is clamped onto the electrode assembly, the clamping piece is pressed onto the surface of the tab from top to bottom, and uses its own gravity to press the tab onto the electrode assembly, thereby achieving a fixed connection of the tab and further improving the reliability of the connection between the tab and the electrode assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on the specific embodiments of the present invention and in conjunction with the accompanying drawings, wherein

[0029] Figure 1 This is a schematic diagram of the structure of a battery in a preferred embodiment of the present utility model;

[0030] Figure 2 for Figure 1 a side view of the battery shown;

[0031] Figure 3 for Figure 1 A schematic diagram of the structure of the battery tab shown;

[0032] Figure 4 forFigure 1 Structure diagram of the insulating and heat-conducting spacer of the battery shown in the figure;

[0033] Figure 5 For Figure 2 Structure diagram of the enlarged view at A shown in the figure;

[0034] Figure 6 For Figure 5 Structure diagram of the electrode assembly shown in the figure;

[0035] Figure 7 For Figure 5 Sectional view of the connection of the gasket and the electrode assembly shown in the figure;

[0036] Figure 8 For Figure 1 Partial enlarged schematic view at B shown in the figure;

[0037] Figure 9 Partial enlarged schematic view of the gasket and the compression member contained in another embodiment of the utility model;

[0038] Figure 10 Partial enlarged schematic view of the gasket and the compression member contained in another embodiment of the utility model;

[0039] Figure 11 Structure schematic view of the connection of the gasket and the FPC assembly in the utility model;

[0040] Figure 12 For Figure 11 Structure schematic view of the enlarged view at C shown in the figure;

[0041] Description of the reference signs in the attached drawings of the specification: 1, electrode assembly; 11, shoulder; 12, pole portion; 2, gasket; 21, insertion slot; 22, connection portion; 23, bottom wall; 24, elastic piece; 25, deformation gap; 26, clamping portion; 27, curved guide portion; 28, first positioning hole; 3, compression member; 31, second positioning hole; 4, insulating and heat-conducting spacer; 41, first recess; 42, second recess; 43, third positioning hole; 44, fourth positioning hole; 45, back of the first recess; 46, avoiding hole; 47, spacer plate; 5, box body; 51, top cover; 6, battery monomer; 7, CSS assembly; 8, FPC assembly; X, third direction; Y, second direction; Z, first direction. DETAILED DESCRIPTION

[0042] The utility model will be further explained in combination with the attached drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0043] EMBODIMENT

[0044] With reference to Figure 1 , 5 and 7, in an embodiment of the present application, a battery pole connecting assembly is connected with the electrode assembly 1 of the battery monomer 6, two electrode assemblies 1 are protruded on the same side of the top cover 51 of the battery monomer 6 along the first direction Z, the battery pole connecting assembly comprises,

[0045] The baffle 2 is detachably clamped on one side of part of the electrode assembly 1 along the first direction Z after the battery monomer 6 is placed upright, so that the baffle 2 is electrically connected with the electrode assembly 1, meanwhile, the clamping is beneficial to the later disassembly of the baffle 2 for replacing and maintaining the battery monomer 6, and improves the assembly efficiency; the baffle 2 is preferably made of copper material;

[0046] The pressing part 3 is arranged on the upper side of the baffle 2 along the first direction Z, and has a certain weight for applying force to the baffle 2 along the gravity direction to press the baffle 2 and the electrode assembly 1, thereby improving the reliability of the connection between the baffle 2 and the electrode assembly 1 and enhancing the anti-shock ability of the connecting assembly; the pressing part 3 can be an insulating pressing plate or a pressing strip, and the pressing plate and / or the pressing strip are fixed.

[0047] With reference to Figure 3 and 6 , the electrode assembly 1 has a shoulder part 11 and three pole parts 12 equidistantly and spacedly arranged on the shoulder part 11 along the second direction Y, and the top of the pole part 12 is gradually tapered; each baffle 2 has three insertion slots 21 equidistantly and spacedly arranged along the second direction Y, and the three insertion slots 21 are arranged corresponding to the three pole parts 12, so that each pole part 12 can be respectively inserted into the three insertion slots 21 to complete the clamping of the baffle 2 and the electrode assembly 1.

[0048] With reference to Figure 3 , the insertion slot 21 is in a groove structure; the insertion slot 21 comprises a bottom wall 23 and side walls welded on both sides of the bottom wall 23; the baffle 2 further comprises a connecting part 22 connected with the insertion slot 21, the connecting part 22 is welded with the side walls of the adjacent two insertion slots 21 and is connected with the shoulder part 11, and the connecting part 22 is provided with a first positioning hole 28 for positioning and connecting the baffle 2.

[0049] With reference to Figure 3 , both side walls of the insertion slot 21 are provided with a plurality of elastic pieces 24, the elasticity of the elastic pieces 24 can make the clamping and disassembly process of the baffle 2 and the electrode assembly 1 more flexible and labor-saving, and the plurality of elastic pieces 24 are spacedly arranged along the third direction X so that the adjacent two elastic pieces 24 have a deformation gap 25, and the plurality of elastic pieces 24 expand to both sides during the insertion of the pole part 12 into the insertion slot 21 and avoid the pole part 12 by using the deformation gap 25.

[0050] In some embodiments, with reference to Figure 3As shown, in order to further improve the stability of the clamping of the tab 2 and the pole column part 12, prevent the tab 2 from moving to the second direction Y side relative to the pole column part 12, the middle part of the two relatively arranged elastic sheets 24 is inwardly retracted to the side of the plug-in slot 21 to form a clamping part 26, and the two relatively arranged clamping parts 26 are used for elastically clamping the pole column part 12 along the second direction Y;

[0051] Wherein, the free end of the elastic sheet 24 and the connecting part 22 are provided with a curved guide part 27, the curved guide part 27 is arranged to connect the free end of the elastic sheet 24 and the curved surface of the connecting part 22, which is used for guiding the top of the pole column part 12, and avoiding scratching the pole column part 12.

[0052] Referring to Figure 5 , 11 As shown, the battery pole column connecting assembly further comprises an FPC assembly 8 and an insulating heat-conducting spacer 4, the FPC assembly 8 extends along the third direction X, a plurality of tabs 2 are arranged at intervals along the third direction X and connected on both sides of the FPC assembly 8, the FPC assembly 8 is a collection circuit and is electrically connected with the tabs 2 on both sides; the insulating heat-conducting spacer 4 is provided with a fourth positioning hole 44 corresponding to the first positioning hole 28, the insulating heat-conducting spacer 4 and the tab 2 are fixedly connected through the fourth positioning hole 44 and the first positioning hole 28, and the insulating heat-conducting spacer 4 is above the tab 2 along the first direction Z and covers the FPC assembly 8, the insulating heat-conducting spacer 4 is used for separating the FPC assembly 8 and the electrode assembly 1 from the outside, avoiding the FPC assembly 8 and the electrode assembly 1 from leaking electricity, and the insulating heat-conducting spacer 4 is also used for conducting the heat generated by the battery monomer 6 to the air or the liquid cooling flow channel; the insulating heat-conducting spacer 4 is preferably made of polycarbonate, polypropylene or the like.

[0053] Referring to Figure 4 As shown, the insulating heat-conducting spacer 4 is provided with a spacer plate 47 and a plurality of avoiding holes 46 located on both sides of the spacer plate 47 along the second direction Y, the spacer plate 47 abuts against the FPC assembly 8 along the first direction Z, and the connecting part 22 of the tab 2 is exposed through the avoiding hole 46, and the spacer plate 47 is preferably made of polycarbonate, polypropylene or the like.

[0054] Referring to Figure 4 As shown, the insulating heat-conducting spacer 4 is further provided with a plurality of first grooves 41 arranged in sequence along the second direction Y, the first grooves 41 extend along the third direction X, and the back part 45 of the first groove 41 is provided with a third positioning hole 43, the opening end of the first groove 41 faces the tab 2 and corresponds to the position of the plug-in slot 21, and when the tab 2 is connected with the insulating heat-conducting spacer 4, the plug-in slot 21 is accommodated in the first groove 41, the plug-in slot 21 and the first groove 41 are bonded, or connected through the third positioning hole 43;

[0055] The insulation and heat conduction spacer 4 is formed with a second groove 42 between two adjacent first grooves 41 and away from one side of the tab 2, the second groove 42 extends along the third direction X and is communicated with the avoiding hole 46, and the second groove 42 is used for accommodating the pressing piece 3 so that the pressing piece 3 abuts against part of the tab 2.

[0056] In an embodiment of the utility model, the setting mode of the pressing piece 3 at least includes one or more combinations of the following:

[0057] Referring to Figure 9 Fig. 4, the spacer plate 47 is a recessed structure, and the pressing piece 3 is embedded in the spacer plate 47 and located between the two tabs 2; or,

[0058] Referring to Figure 8 Fig. 4, the pressing piece 3 is embedded in the second groove 42 and is located on both sides of the insulation and heat conduction spacer 4 along the second direction Y; or,

[0059] Referring to Figure 10 Fig. 5, in the clamping and fixing of the flat pole battery monomer 6, the pressing piece 3 is connected to one side of the first groove 41 away from the tab 2 along the first direction Z and is located at the middle position of the tab 2.

[0060] Referring to Figure 1 and 2 Fig. 6, a battery is also provided, which comprises,

[0061] The box body 5 is provided with a second positioning hole 31 on the side edge thereof;

[0062] The battery monomer 6 is arranged in an array in the box body 5; the battery monomer 6 comprises a top cover 51 and an electrode assembly 1 protruding on the same side of the top cover 51 along the first direction Z;

[0063] and,

[0064] The battery pole connecting assembly;

[0065] The tab 2 of the battery pole connecting assembly is detachably connected with the electrode assembly 1 to realize the electrical connection between the battery pole connecting assembly and the electrode assembly 1 of the plurality of battery monomers 6, wherein the two ends of the pressing piece 3 are fixedly connected with the second positioning hole 31 of the box body 5 through bolts.

[0066] The working principle of the battery pole connecting assembly and the battery thereof is as follows:

[0067] After the battery cell 6 is placed upright, the insulation and heat isolation piece 4, the pressing piece 3, the FPC assembly 8 and the gasket 2 are integrated into the CCS assembly 7, and then the CCS assembly 7 is clamped on the electrode assembly 1 from top to bottom, and the pole part 12 is inserted into the insertion slot 21, and then the pressing piece 3 is fixedly connected with the battery box 5 through bolts. When the battery cell 6 is replaced or maintained, the bolts are removed, the pressing piece 3 and the box 5 are loosened, and then the whole CCS assembly 7 is lifted.

[0068] Obviously, the above embodiments are only examples for clearly illustrating, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A battery pole connection assembly which connects with electrode assemblies (1) of a battery cell (6), two of the electrode assemblies (1) being projected on the same side of a top cover (51) of the battery cell (6) in a first direction (Z), characterized in that, The battery pole connecting assembly comprises, A gasket (2) is detachably clamped on one side of the electrode assembly (1) along the first direction (Z) to make the gasket (2) electrically connected with the electrode assembly (1); A pressing member (3) is arranged on one side of the gasket (2) along the first direction (Z) and is used for applying force to the gasket (2) in the direction of gravity to press the gasket (2) and the electrode assembly (1).

2. A battery post connection assembly according to claim 1, wherein The electrode assembly (1) has a shoulder (11) and a plurality of pole portions (12) arranged on the shoulder (11) along a second direction (Y); each gasket (2) has a plurality of insertion slots (21) arranged along the second direction (Y), and the pole portions (12) are respectively inserted into the insertion slots (21).

3. A battery post connection assembly according to claim 2, wherein, The insertion slot (21) is in a groove structure; the insertion slot (21) comprises a bottom wall (23) and side walls connected to both sides of the bottom wall (23); the gasket (2) further comprises a connecting portion (22) connected to the insertion slot (21), the connecting portion (22) connects the side walls of two adjacent insertion slots (21) and is in abutting connection with the shoulder (11).

4. A battery post connection assembly according to claim 3, wherein The side wall of the insertion slot (21) is provided with a plurality of elastic pieces (24) arranged at intervals along a third direction (X) so that there is a deformation gap (25) between two adjacent elastic pieces (24).

5. A battery post connection assembly according to claim 4, wherein, The middle portions of two oppositely arranged elastic pieces (24) are inwardly recessed to form clamping portions (26), and two oppositely arranged clamping portions (26) are used for elastically clamping the pole portions (12). The free end of the elastic piece (24) and the connecting portion (22) are provided with a curved guide portion (27).

6. A battery post connection assembly according to claim 2, wherein The battery pole connecting assembly further comprises an FPC assembly (8) and an insulating and heat-conducting spacer (4), a plurality of gaskets (2) are arranged at intervals along a third direction (X) and are connected on both sides of the FPC assembly (8); the insulating and heat-conducting spacer (4) is connected on one side of the gasket (2) along the first direction (Z) and covers the FPC assembly (8).

7. A battery post connection assembly according to claim 6, wherein The insulating and heat-conducting spacer (4) is provided with a spacer plate (47) and a plurality of avoiding holes (46) located on both sides of the spacer plate (47) along the second direction (Y), the spacer plate (47) abuts against the FPC assembly (8) along the first direction (Z), and the gasket (2) is exposed through the avoiding hole (46).

8. A battery post connection assembly according to claim 7, wherein, The insulating and heat-conducting spacer (4) is further provided with a plurality of first grooves (41) arranged in sequence along the second direction (Y), the opening end of the first groove (41) faces the gasket (2) and corresponds to the position of the insertion slot (21), and when the gasket (2) is connected with the insulating and heat-conducting spacer (4), the insertion slot (21) is accommodated into the first groove (41); A second groove (42) is formed between two adjacent first grooves (41) and away from one side of the pad (2), the second groove (42) is in communication with the avoiding hole (46), and the second groove (42) is used for accommodating the pressing member (3) so that the pressing member (3) is in abutment with part of the pad (2).

9. A battery post connection assembly according to claim 8, wherein, The arrangement of the pressing member (3) at least includes one or a combination of the following: The isolation plate (47) is a recessed structure, and the pressing member (3) is embedded in the isolation plate (47) and located between two pads (2); or, The pressing member (3) is embedded in the second groove (42) and is located on both sides of the insulating and heat-conducting isolation member (4) in the second direction (Y); or, The pressing member (3) is connected to one side of the first groove (41) away from the pad (2) in the first direction (Z) and is located at the middle position of the pad (2).

10. A battery, characterized by It comprises, a box (5); a plurality of battery monomers (6) arranged in an array in the box (5); the battery monomer (6) comprises a top cover (51) and an electrode assembly (1) protruding on the same side of the top cover (51) in the first direction (Z); and, the battery pole connecting assembly according to any one of claims 1 to 9; The pad (2) of the battery pole connecting assembly is detachably connected with the electrode assembly (1) to realize the electrical connection between the battery pole connecting assembly and the electrode assembly (1) of a plurality of battery monomers (6).

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