Busbar module and method for manufacturing the same

Abstract

To further improve assemblability.SOLUTION: The busbar module is for interconnecting respective battery cells of a battery module in which a plurality of battery cells are stacked in an array. The busbar module includes: a pair of end bus-bars respectively disposed at both ends; a pair of rods installed between the pair of end bus-bars; and a plurality of busbar sub-members disposed between the pair of rods and between the pair of end bus-bars, the plurality of busbar sub-members being slidable along a longitudinal direction of the rods with respect to the pair of rods.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a busbar module and a method for manufacturing the same. [Background technology]

[0002] BACKGROUND ART Bus bar modules are known for interconnecting battery cells of a battery module in which a plurality of battery cells are stacked and arranged (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2012 / 057322 Summary of the Invention [Problem to be solved by the invention]

[0004] In the bus bar module, the bus bar is divided into multiple bus bar blocks. However, it is not easy to position each bus bar block relative to the terminals of each battery cell, and there is room for improvement in assembly.

[0005] The present disclosure has been made to solve such problems, and a main object of the present disclosure is to provide a bus bar module that can further improve assembly ease and a manufacturing method thereof. [Means for solving the problem]

[0006] In order to achieve the above object, one aspect of the present disclosure is to A bus bar module for connecting each battery cell of a battery module in which a plurality of battery cells are stacked and arranged, a pair of end bus bars disposed at both ends, a pair of rods respectively installed between the pair of end bus bars; a plurality of busbar sub-members disposed between the pair of rods and the pair of end busbars, and slidable relative to the pair of rods along the longitudinal direction of the rods; Busbar Module is. In this aspect, the number of busbar sub-members to be disposed between the pair of rods and the pair of end busbars is determined in accordance with the number of the plurality of battery cells; The length of the pair of rods may be determined in accordance with the number of the busbar sub-members. In this aspect, The pair of rods are each formed with a rail-shaped groove that opens inward in the width direction along the longitudinal direction of the rod, and a pair of protrusions that protrude outward in the width direction are formed on both ends of the busbar sub-member, and the pair of protrusions of the busbar sub-member fit into the rail-shaped grooves of the pair of rods, or The pair of rods may have rail-shaped grooves that open upward along the longitudinal direction of the rods, and a pair of bent portions may be formed at both ends of the busbar sub-member, and the tips of the pair of bent portions of the busbar sub-member may engage with the rail-shaped grooves of the pair of rods. In order to achieve the above object, one aspect of the present disclosure is to a pair of end bus bars disposed at both ends, a pair of rods respectively installed between the pair of end bus bars, a plurality of busbar sub-members are arranged between the pair of rods and the pair of end busbars by sliding them along the longitudinal direction of the rods in correspondence with the plurality of stacked battery cells; Busbar module manufacturing method is. In this aspect, Each busbar sub-member may be slid along the longitudinal direction of the pair of rods to be positioned at the terminal position of the corresponding battery cell. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a bus bar module and a manufacturing method thereof that can further improve assembly performance. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing a state in which the bus bar module is arranged on the battery module. [Figure 2] 1 is a diagram illustrating a schematic configuration of a bus bar module according to an embodiment of the present invention. [Figure 3] 3 is a cross-sectional view of the bus bar module shown in FIG. 2 taken along line AA. [Figure 4] 3 is a cross-sectional view of the bus bar module shown in FIG. 2 taken along line AA. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present embodiment will be described below with reference to the drawings. A bus bar module according to the present embodiment connects the battery cells of a battery module in which a plurality of battery cells are stacked and arranged.

[0010] The battery module is applied to, for example, a battery pack mounted on a vehicle (such as an electric vehicle or a hybrid vehicle) equipped with an electric motor such as a motor as a drive source, and is used to supply power to the electric motor, etc. The battery pack is composed of, for example, lithium-ion batteries, nickel-cadmium batteries, nickel-metal hydride batteries, etc.

[0011] In a battery module, for example, the battery cells are stacked with one of the electrode terminals of each battery cell aligned in a row and the other electrode terminal also aligned in a row, and therefore, in this battery module, electrode terminal groups made up of aligned electrode terminals are provided in two locations.

[0012] 1, the pair of busbar modules 1 are arranged along the electrode terminal groups of the battery module 10 configured as described above and are electrically connected to the electrode terminal groups. The busbar modules 1 are fixed to the battery module 10 by, for example, stud bolts provided on the battery module 10.

[0013] Fig. 2 is a diagram showing a schematic configuration of a busbar module according to this embodiment. Fig. 2 is a diagram showing the busbar module as viewed from above. As shown in Fig. 2, the busbar module 1 according to this embodiment includes a pair of end busbars 2 and 3 arranged at both ends, a pair of rods 4 and 5 installed between the pair of end busbars 2 and 3, and a plurality of busbar sub-members 6 arranged between the pair of rods 4 and 5 and between the pair of end busbars 2 and 3.

[0014] The busbar sub-member 6 is a plate-like member extending in the width direction (the vertical direction in FIG. 2). As shown in FIG. 2, the busbar sub-member 6 is slidable relative to the pair of rods 4, 5 along the longitudinal direction of the rods 4, 5 (the horizontal direction in FIG. 2). FIG. 3 is a cross-sectional view of the busbar module shown in FIG. 2 taken along line AA.

[0015] 3, rail-shaped grooves 41, 51 that open to the inside in the width direction are formed along the longitudinal direction of the pair of rods 4, 5. Meanwhile, a pair of protrusions 61 that protrude outward in the width direction are formed on both ends of the busbar sub-member 6 (top and bottom ends in FIGS. 2 and 3).

[0016] Then, as the pair of protrusions 61 of the busbar sub-member 6 fit into the rail-shaped grooves 41, 51 of the pair of rods 4, 5, as described above, each busbar sub-member 6 can slide relative to the pair of rods 4, 5 along the longitudinal direction of the rods 4, 5.

[0017] In addition, the pair of rods may each be formed with a rail-shaped protrusion that protrudes inward in the width direction, and a pair of grooves that open outward in the width direction may be formed at both ends of the busbar sub-member.

[0018] However, busbar modules generally have a complex structure, and the mold costs for molding them are high. In addition, the number of battery cells installed varies depending on the type of battery pack, and creating a new mold each time increases manufacturing costs.

[0019] Furthermore, when connecting the electrode terminal group of the battery module and the busbar module, the busbar module structure has many similarly shaped parts in the portion having the busbar. For example, the busbar parts are connected by a hinge structure to form a single component. For this reason, in the past, the rigidity of this hinge structure was controlled to adjust for variations in the positions of the electrode terminal group of the battery module. However, because the hinge structure is highly rigid, if the variations in the positions of the terminals become large, it becomes difficult to adjust for the variations. This makes it difficult to position the electrode terminal group of the battery module and the busbar module, resulting in poor assembly.

[0020] In contrast, in the busbar module 1 according to this embodiment, as described above, the number of busbar sub-members 6 arranged between the pair of rods 4, 5 and the pair of end busbars 2, 3 can be freely changed according to the number of battery cells in each battery module 10.

[0021] That is, it is only necessary to match the number of busbar sub-members 6 to be arranged with the number of battery cells in each battery module 10. Then, the length of the pair of rods 4, 5 is determined according to the number of busbar sub-members 6, and each rod 4, 5 is adjusted to that length. Therefore, there is no need to create a new mold or the like, which reduces manufacturing costs.

[0022] Furthermore, in the busbar module 1 according to this embodiment, as described above, each busbar sub-member 6 is slidable along the longitudinal direction of the pair of rods 4, 5. This allows each busbar sub-member 6 of the busbar module 1 to slide along the rods 4, 5 and be positioned easily and with high precision relative to the electrode terminal group of the battery module 10. This further improves ease of assembly.

[0023] Next, a method for manufacturing the busbar module 1 according to this embodiment will be described. First, the number of busbar sub-members 6 to be arranged between the pair of rods 4, 5 and the pair of end busbars 2, 3 is determined according to the number of battery cells in the battery module 10. The length of the pair of rods 4, 5 is determined according to the number of busbar sub-members 6 to be arranged.

[0024] A pair of rods 4, 5 is placed between each pair of end bus bars 2, 3. Between each pair of rods 4, 5 and each pair of end bus bars 2, 3, each bus bar sub-member 6 is slid along the longitudinal direction of the rods 4, 5 to be positioned and placed at the terminal position of the corresponding battery cell.

[0025] As described above, according to the manufacturing method of the busbar module 1 according to this embodiment, it is only necessary to match the number of busbar sub-members 6 to be arranged with the number of battery cells in each battery module 10. Furthermore, each busbar sub-member 6 of the busbar module 1 can be slid along the rods 4, 5, allowing for easy and highly accurate positioning. This reduces manufacturing costs and improves assembly ease.

[0026] Although several embodiments of the present disclosure have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims.

[0027] In the above embodiment, the pair of rods 4, 5 are respectively formed with rail-like grooves 41, 51 that open to the inside in the width direction along the longitudinal direction thereof, but are not limited to this. For example, as shown in Fig. 4, the pair of rods 7, 8 may be formed with rail-like grooves 71, 81 that open to the upper side along the longitudinal direction thereof.

[0028] Meanwhile, a pair of bent portions 91 are formed on both ends of the busbar sub-member 9. Then, the tips of the pair of bent portions 91 of the busbar sub-member 9 engage with the rail-shaped grooves 71, 81 of the pair of rods 7, 8, so that, similarly to the above, each busbar sub-member 9 can slide relative to the pair of rods 7, 8 in the longitudinal direction of the rods 7, 8. This allows each busbar sub-member 9 to slide along the rods 7, 8, and be positioned easily and with high precision.

[0029] The pair of rods may have rail-shaped protrusions that protrude downward along their longitudinal direction, and grooves that open upward may be formed at both ends of the busbar sub-member. [Explanation of symbols]

[0030] 1 busbar module, 2, 3 End busbars 4, 5 rods 6 Busbar sub-component 7, 8 rods 9 Busbar sub-component 10 Battery Module 41, 51 groove 61 Protrusion 71, 81 groove 91 Bend

Claims

1. A bus bar module for connecting each battery cell of a battery module in which a plurality of battery cells are stacked and arranged, a pair of end bus bars disposed at both ends, a pair of rods respectively installed between the pair of end bus bars; a plurality of busbar sub-members disposed between the pair of rods and the pair of end busbars, and slidable relative to the pair of rods along the longitudinal direction of the rods; Busbar module.

2. 2. The bus bar module according to claim 1, the number of busbar sub-members to be disposed between the pair of rods and the pair of end busbars is determined in accordance with the number of the plurality of battery cells; The length of the pair of rods is determined according to the number of the busbar sub-members. Busbar module.

3. 2. The bus bar module according to claim 1, The pair of rods are each formed with a rail-shaped groove that opens inward in the width direction along the longitudinal direction of the rod, and a pair of protrusions that protrude outward in the width direction are formed on both ends of the busbar sub-member, and the pair of protrusions of the busbar sub-member fit into the rail-shaped grooves of the pair of rods, or The pair of rods have rail-shaped grooves that open upward along the longitudinal direction of the rods, and the busbar sub-member has a pair of bent portions at both ends, and tips of the pair of bent portions of the busbar sub-members engage with the rail-shaped grooves of the pair of rods. Busbar module.

4. a pair of end bus bars disposed at both ends, a pair of rods respectively installed between the pair of end bus bars, a plurality of busbar sub-members are arranged between the pair of rods and the pair of end busbars by sliding them along the longitudinal direction of the rods in correspondence with the plurality of stacked battery cells; A method for manufacturing a busbar module.

5. 5. A method for manufacturing a bus bar module according to claim 4, each busbar sub-member is slid along the longitudinal direction of the pair of rods to be positioned at the terminal position of the corresponding battery cell; A method for manufacturing a busbar module.

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