Novel battery busbar, battery module and battery system

Abstract

The utility model discloses a novel battery busbar, a battery module and a battery system. The novel battery busbar comprises a strip-shaped busbar main body, the front side of the busbar main body is provided with a to-be-bent area along the short edge direction of the busbar main body; the to-be-bent area is provided with a plurality of front pre-cutting grooves in the direction of the short edge of the busbar body. The plurality of front pre-cutting grooves are distributed at equal intervals and extend along the long side of the busbar main body; the positions, corresponding to the left side and the right side of the to-be-bent area, of the end faces of the left side and the right side of the busbar body are each provided with a side pre-cutting groove. The two side pre-cutting grooves are distributed in a bilateral symmetry mode and are the same in shape and size. A first mounting hole and a second mounting hole are respectively formed in the upper end and the lower end of the busbar main body; and the busbar main body is fixedly connected with external electric equipment through the first mounting hole and the second mounting hole. According to the utility model, the bending processing of the busbar is facilitated structurally, the overall performance of the busbar is not influenced, and the structural strength is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially a kind of novel battery busbar and battery module, battery system. BACKGROUND

[0002] Compared with copper busbar, thicker aluminum busbar is more suitable for occasions sensitive to large current transmission and weight, such as high-power industrial equipment, rail transit, new energy vehicles, renewable energy systems, aerospace and shipbuilding industry.

[0003] In these occasions, thicker aluminum busbar can maximize the advantages of lightweight and low cost of aluminum material while maintaining sufficient conductivity. In high-voltage switchgear, bus duct and other power distribution equipment, thicker (e.g., greater than 3mm in thickness) aluminum busbar can carry larger current, especially in situations where high current needs to be transmitted while keeping costs low, using thicker aluminum busbar is particularly suitable.

[0004] However, aluminum busbars with large thickness (e.g., greater than 3mm in thickness) are often difficult to be processed without affecting their performance in design situations that require bending.

[0005] Therefore, there is an urgent need to develop a technology that facilitates the bending of busbars from a structural point of view without affecting the overall performance (i.e., current-carrying capacity) of the busbar. SUMMARY

[0006] The utility model aims at the technical defects existing in prior art, provide a kind of novel battery busbar and battery module, battery system.

[0007] Therefore, the utility model provides a kind of novel battery busbar, including long strip-shaped busbar main body;

[0008] The front side of busbar main body is provided with the to-be-bent area along the short side of busbar main body;

[0009] A plurality of front pre-cut grooves are provided on the to-be-bent area along the short side of busbar main body;

[0010] The plurality of front pre-cut grooves are equally spaced and extend along the long side of busbar main body;

[0011] The plurality of front pre-cut grooves are identical in shape and size and are cuboid-shaped;

[0012] The left and right side surfaces of busbar main body are respectively provided with a side pre-cut groove at positions corresponding to the left and right sides of the to-be-bent area;

[0013] The two side pre-cut grooves are symmetrically distributed and identical in shape and size;

[0014] A first mounting hole and a second mounting hole are arranged at the upper and lower ends of the busbar body respectively.

[0015] The busbar body is fixedly connected with the external electrical equipment through the first mounting hole and the second mounting hole.

[0016] In addition, the utility model provides a battery module which comprises a plurality of single batteries.

[0017] The plurality of single batteries are connected in parallel, in series or in series-parallel.

[0018] At least one of the single batteries is connected with the power input end of the external electrical equipment through the novel battery busbar.

[0019] In addition, the utility model provides a battery system which comprises at least one battery module as described above.

[0020] The technical scheme provided by the utility model has the advantages that compared with the prior art, the utility model provides a novel battery busbar, a battery module and a battery system, and the design is scientific. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1a The utility model provides a novel battery busbar before bending, and the front view is shown in the figure.

[0022] Figure 1b The utility model provides a novel battery busbar before bending, and the right view is shown in the figure. Figure 1a The utility model provides a novel battery busbar before bending, and the front view is shown in the figure.

[0023] Figure 1c The utility model provides a novel battery busbar before bending, and the right view is shown in the figure. Figure 1a The utility model provides a novel battery busbar before bending, and the front view is shown in the figure.

[0024] Figure 2a The utility model provides a novel battery busbar before bending, and the right view is shown in the figure.

[0025] Figure 2b The utility model provides a novel battery busbar before bending, and the front view is shown in the figure. Figure 2a The utility model provides a novel battery busbar before bending, and the front view is shown in the figure.

[0026] Figure 3 The utility model provides a novel battery busbar before bending, and the right view is shown in the figure. DETAILED DESCRIPTION

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meanings of the above terms in the present patent can be understood according to the specific circumstances.

[0030] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0031] Referring to Figures 1a to 1c , Figures 2a to 2b , Figure 3 The present application provides a novel battery busbar, which is a thick busbar with a novel bending structure, comprising a long strip-shaped busbar body 8;

[0032] The front side of the busbar body 8 is provided with a to-be-bent area 9 along the short side direction of the busbar body 8 (i.e. transversely distributed);

[0033] A plurality of (for example, three) front pre-cut grooves are arranged on the to-be-bent area 9 along the short side direction of the busbar body 8;

[0034] The plurality of front pre-cut grooves are distributed at equal intervals and along the long side direction of the busbar body 8;

[0035] The plurality of front pre-slots are cuboid-shaped recesses with the same size and shape;

[0036] The left and right side faces of the bus bar body 8 are respectively provided with a side pre-slot at positions corresponding to the left and right sides of the to-be-bent area 9;

[0037] The two side pre-slots are symmetrically distributed and have the same size and shape;

[0038] In the utility model, specifically, on the to-be-bent area 9, a first front pre-slot 1, a second front pre-slot 2 and a third front pre-slot 3 along the short edge direction of the bus bar body 8 are arranged;

[0039] The first front pre-slot 1, the second front pre-slot 2 and the third front pre-slot 3 are equidistantly distributed and along the long edge direction of the bus bar body 8;

[0040] The first front pre-slot 1 and the third front pre-slot 3 are located on the upper and lower sides of the second front pre-slot 2;

[0041] The first front pre-slot 1, the second front pre-slot 2 and the third front pre-slot 3 have the same size and shape.

[0042] Specifically, the depth (i.e. the depth of recess into the bus bar body 8) of the first front pre-slot 1, the second front pre-slot 2 and the third front pre-slot 3 is less than or equal to one fourth of the overall thickness (i.e. the longitudinal width) of the bus bar body 8. That is, the first front pre-slot 1, the second front pre-slot 2 and the third front pre-slot 3 are shallow slots.

[0043] Further, when the thickness of the bus bar body 8 is 5mm, the depth of the first front pre-slot 1, the second front pre-slot 2 and the third front pre-slot 3 is 1mm, and the width is 1mm;

[0044] The interval between the center line of the first front pre-slot 1 and the center line of the second front pre-slot 2 is 2mm;

[0045] The interval between the center line of the third front pre-slot 3 and the center line of the second front pre-slot 2 is 2mm;

[0046] Specifically, the first front pre-slot 1, the second front pre-slot 2 and the third front pre-slot 3 transversely penetrate the front side transverse face (i.e. the transverse front side face) of the bus bar body 8;

[0047] It should be noted that, for the utility model, a plurality of shallow slots are designed, which can more evenly distribute stress and reduce the weakening of the cross-sectional area of the bus bar body 8 by each slot, thereby reducing the influence on the flow capacity.

[0048] In the utility model, specifically realize, the transverse center line (that is, the center axis of transverse distribution) of the area to be bent 9 and the longitudinal center line (that is, the longitudinal center axis) of the two side pre-slots are perpendicular.

[0049] In the utility model, specifically realize, the longitudinal width of the side pre-slot before the busbar main body executes the bending operation is equal to the thickness of the busbar main body 8.

[0050] In the utility model, specifically realize, the left and right side end faces of the busbar main body 8 are respectively provided with the second side pre-slot 5 and the first side pre-slot 4 at the positions corresponding to the left and right sides of the area to be bent 9.

[0051] Specifically realize, the upper and lower side faces of the first side pre-slot 4 and the second side pre-slot 5 are respectively parallel to the upper and lower end faces of the busbar main body 8.

[0052] Specifically realize, when the thickness of the busbar main body 8 is 5mm, the depth (that is, the depth of recessing into the busbar main body 8) of the first side pre-slot 4 and the second side pre-slot 5 is 1mm, and the width is equal to the thickness of the busbar main body 8.

[0053] The height of the first side pre-slot 4 and the second side pre-slot 5 is 5.64mm.

[0054] Specifically realize, the transverse center line of the first side pre-slot 4 and the second side pre-slot 5 coincides with the bending line.

[0055] The bending line is the center line (that is, the center axis of transverse distribution) of the transverse distribution of the area to be bent 9.

[0056] Specifically realize, the rear side face of the area to be bent 9 is perpendicular to the two slot faces (that is, the two slot faces of vertical distribution) of the first side pre-slot 4 and the second side pre-slot 5 in the opposite direction.

[0057] It should be noted that, for the utility model, through the first side pre-slot 4 and the second side pre-slot 5, the outward protruding deformation of the busbar main body 8 in the bending process can be effectively offset, and the stress concentration of the area (that is, the area to be bent 9) is reduced.

[0058] In the utility model, it needs to be explained that, generally, pre-cutting operation will affect the current-carrying capacity of busbar, and the specific degree depends on the depth, width and the material section area influenced by pre-cutting. The current-carrying capacity of busbar is directly related to its section area and resistance, and pre-cutting operation can reduce the effective section area of busbar in local area, thereby increasing the resistance and possibly causing local overheating and affecting the current-carrying capacity. The open slot formed by pre-cutting operation can reduce the conductive section area of busbar in the bending area, thereby increasing the resistance of the area. The increase of resistance means that more electric energy will be converted into heat, which may cause local overheating. The deeper the pre-cutting, the more the effective section area of busbar is reduced, and the more obvious the decrease of current-carrying capacity. After inspection, the influence of shallow slot (less than or equal to 1 / 4 of the thickness of busbar material) formed by pre-cutting operation (i.e. pre-cut slot) is smaller, while deep slot (greater than or equal to 1 / 3 of the thickness of busbar material) can significantly reduce the current-carrying capacity of busbar.

[0059] In summary, it needs to be explained that, for the utility model, when pre-cutting or pre-slot processing of thick busbar is carried out, the selection of position is very critical. In order to ensure the smoothness of the bending process and reduce material cracking and stress concentration, the pre-cutting slot is arranged at the predetermined bending line (i.e. at the center line of the transversely distributed bending area 9), and the position of pre-cutting is along the center line of planned bending, that is, at the line where the busbar is intended to be bent. In this way, the deformation of material during bending can be concentrated at the cutting slot position, which helps to reduce the bending force and reduce stress concentration.

[0060] It needs to be explained that, for the utility model, the pre-cutting slot is also arranged on the inner side of the bending position, that is, on the side that is compressed during bending. The material on the inner side bears compression stress during bending, and pre-cutting can help the material to deform more easily while reducing the risk of cracking. The outer side of bending bears tensile stress, and no pre-cutting is performed. The outer side needs to maintain the integrity of the material to avoid cracking due to the existence of pre-cutting slot.

[0061] In the utility model, specifically, the upper and lower ends of the busbar body 8 are respectively provided with a circular first mounting hole 6 and a circular second mounting hole 7.

[0062] The busbar body 8 is fixedly connected with the external electrical equipment through the first mounting hole 6 and the second mounting hole 7.

[0063] Specifically, the shell of the external electrical equipment is provided with a first threaded hole and a second threaded hole at positions corresponding to the first mounting hole 6 and the second mounting hole 7.

[0064] The busbar body 8 is connected with the shell of the external electrical equipment through the first screw and the second screw.

[0065] The first screw is fixedly connected with the first threaded hole corresponding to the position after passing through the first mounting hole 6.

[0066] The second screw is fixedly connected with the second threaded hole corresponding to the position after passing through the second mounting hole 7.

[0067] In the utility model, the surface of the busbar main body 8 is plated with a layer of nickel.

[0068] In the surface of the busbar main body 8 after the bending operation (i.e. the surface of the busbar main body 8 after the forward bending operation on the to-be-bent area 9), a layer of nickel is plated.

[0069] It should be noted that the bent busbar needs to be surface treated, such as nickel plating, to improve the corrosion resistance and improve the conductivity of the current. The nickel plating layer can reduce the local resistance and help reduce the possibility of overheating.

[0070] In order to more clearly understand the technical scheme of the utility model, the following describes the bending operation process of the novel battery busbar provided by the utility model.

[0071] First, a cutting machine or a laser cutting machine is used to cut a square block with a corresponding busbar size on an aluminum plate with a thickness of 5mm, i.e. to obtain an aluminum busbar main body 8;

[0072] Then, after deburring and chamfering the busbar main body 8, the existing processing equipment (such as a machine tool) is used to process the first front pre-cut groove 1, the second front pre-cut groove 2 and the third front pre-cut groove 3 on the to-be-bent area 9 of the front side of the busbar main body 8, and to process the first side pre-cut groove 4 and the second side pre-cut groove 5 on the two side end faces of the busbar main body, i.e. to perform a pre-cutting processing operation;

[0073] Then, a bending machine is used to complete the bending, specifically: the part of the busbar main body 8 above the to-be-bent area 9 is forced to bend forward, and the bending angle is 90°, then the curved groove area (i.e. the to-be-bent area 9 after the bending operation is completed) is polished, then the whole is plated with nickel to obtain the finished product, the bent busbar.

[0074] Based on the novel battery busbar provided by the above-mentioned application, the application further provides a battery module comprising a plurality of single batteries;

[0075] The plurality of single batteries are connected in parallel, series or series-parallel (i.e. a combination of series and parallel connection).

[0076] At least one pole of the single battery is connected to the power input end of the external power equipment through the novel battery busbar as described above.

[0077] It should be noted that the specific manner of connecting the plurality of single batteries in series, in parallel, and in series-parallel for the battery module is a conventional and well-known technology, and will not be described here.

[0078] Based on the battery module provided by the present application, the present application further provides a battery system comprising at least one battery module as described above.

[0079] Specifically, when the battery system comprises a plurality of battery modules, the plurality of battery modules are connected in parallel, in series, or in series-parallel.

[0080] It should be noted that the specific manner of connecting the plurality of battery modules in series, in parallel, and in series-parallel for the battery system is a conventional and well-known technology, and will not be described here.

[0081] In summary, the present application sets a plurality of pre-cut shallow grooves (i.e., first, second, and third pre-cut grooves 1, 2, and 3) in the bending line area (i.e., the area to be bent 9) of the busbar, so that the extrusion stress generated near the bending line area (i.e., the area to be bent 9) during bending is more evenly distributed and offset, achieving the purpose of strengthening the structural strength of the busbar. In addition, two mirror-distributed side pre-cut grooves (first and second side pre-cut grooves 4 and 5) are set at both ends of the bending line area (i.e., the area to be bent 9), which can offset the outward protruding deformation of the busbar during the bending process, reduce the stress concentration in this area (i.e., the area to be bent 9), and strengthen the structural strength of the busbar. Finally, the busbar is overall nickel-plated to improve the overall flow capacity of the busbar.

[0082] The above is only the preferred embodiment of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A novel battery bus, characterized by, The busbar body (8) includes a long strip-shaped busbar body (8); The front side of the busbar body (8) is provided with a to-be-bent area (9) extending along the short side of the busbar body (8); A plurality of front pre-slots extending along the short side of the busbar body (8) are arranged on the to-be-bent area (9); The plurality of front pre-slots are equally spaced and extend along the long side of the busbar body (8); The plurality of front pre-slots are cuboid-shaped and have the same size; The left and right side faces of the busbar body (8) are respectively provided with a side pre-slot corresponding to the left and right sides of the to-be-bent area (9); The two side pre-slots are symmetrically distributed and have the same size; The upper and lower ends of the busbar body (8) are respectively provided with a circular first mounting hole (6) and a circular second mounting hole (7); The busbar body (8) is fixedly connected with an external electrical equipment through the first mounting hole (6) and the second mounting hole (7).

2. The novel battery bus of claim 1, wherein, The to-be-bent area (9) is provided with a first front pre-slot (1), a second front pre-slot (2), and a third front pre-slot (3) extending along the short side of the busbar body (8); The first front pre-slot (1), the second front pre-slot (2), and the third front pre-slot (3) are equally spaced and extend along the long side of the busbar body (8); The first front pre-slot (1) and the third front pre-slot (3) are located on the upper and lower sides of the second front pre-slot (2); The first front pre-slot (1), the second front pre-slot (2), and the third front pre-slot (3) have the same size.

3. The novel battery bus of claim 2, wherein, The depth of the first front pre-slot (1), the second front pre-slot (2), and the third front pre-slot (3) is less than or equal to one fourth of the thickness of the busbar body (8); And / or, When the thickness of the busbar body (8) is 5 mm, the depth of the first front pre-slot (1), the second front pre-slot (2), and the third front pre-slot (3) is 1 mm, and the width is 1 mm; the interval between the center line of the first front pre-slot (1) and the center line of the second front pre-slot (2) is 2 mm; the interval between the center line of the third front pre-slot (3) and the center line of the second front pre-slot (2) is 2 mm; And / or, The first front pre-slot (1), the second front pre-slot (2), and the third front pre-slot (3) transversely penetrate the front side transverse face of the busbar body (8).

4. The novel battery bus of claim 1, wherein, The longitudinal width of the side pre-slot before the busbar body performs the bending operation is equal to the thickness of the busbar body (8); And / or, The rear side of the to-be-bent area (9) is perpendicular to the two slot faces opposite to the first side pre-slot (4) and the second side pre-slot (5); And / or, The surface of the busbar body (8) after the bending operation of the to-be-bent area (9) is plated with a layer of nickel.

5. The novel battery bus of any one of claims 1 to 4, wherein, The left and right side faces of the busbar body (8) are respectively provided with a second side pre-slot (5) and a first side pre-slot (4) corresponding to the left and right sides of the to-be-bent area (9); The upper and lower side faces of the first side pre-slot (4) and the second side pre-slot (5) are respectively parallel to the upper and lower end faces of the busbar body (8).

6. The novel battery bus of claim 5, wherein, When the thickness of the busbar body (8) is 5mm, the depth of the first side pre-cut groove (4) and the second side pre-cut groove (5) is 1mm, and the width is equal to the thickness of the busbar body (8); The height of the first side pre-cut groove (4) and the second side pre-cut groove (5) is 5.64mm.

7. The novel battery bus of claim 5, wherein, The rear side of the to-be-bent area (9) is perpendicular to the two groove surfaces in the opposite direction of the first side pre-cut groove (4) and the second side pre-cut groove (5).

8. The novel battery bus of any one of claims 1 to 7, wherein, The shell of the external electrical equipment is provided with a first threaded hole and a second threaded hole at positions corresponding to the first mounting hole (6) and the second mounting hole (7), respectively; The busbar body (8) is connected with the shell of the external electrical equipment through the first screw and the second screw; The first screw is screw-fixedly connected with the first threaded hole in position after passing through the first mounting hole (6); The second screw is screw-fixedly connected with the second threaded hole in position after passing through the second mounting hole (7).

9. A battery module, characterized by The plurality of single batteries are connected in parallel, series or series-parallel connection. The plurality of single batteries are connected in parallel, series or series-parallel connection. At least one pole of the single battery is connected with the power input end of the external electrical equipment through the novel battery busbar as claimed in any one of claims 1 to 8.

10. A battery system characterized by, The battery module as claimed in claim 9 is included. The battery module as claimed in claim 9 is included.

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