Connecting bar structure and battery module

Abstract

The utility model provides a connecting bar structure and a battery module, and belongs to the field of new energy batteries. The structure comprises a connecting row, the connecting row is of a square sheet structure and comprises a first plate face and a second plate face which are opposite, a bent part is arranged in the middle of the connecting row, the bent part is arranged in the width direction of the connecting row, the bent part is arranged on the second plate face in a protruding mode, and a groove-shaped structure is formed in the first plate face; pole mounting grooves are formed in the two sides of the bent part, and welding holes are formed in the centers of the pole mounting grooves. By adopting the connecting bar structure and the battery module provided by the embodiment of the utility model, the problem that the energy density of a battery pack is relatively low due to the fact that a connecting bar occupies a relatively large longitudinal space in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and particularly to a connection row structure and a battery module. Background Art

[0002] With the development of new energy battery packs, the demand for energy density per unit volume is increasing day by day, and the space utilization rate inside the battery pack has attracted more and more attention. A battery module is made by connecting multiple battery packs, and when connecting the battery packs, a connection row is usually adopted.

[0003] The connection row in the related art is a simple sheet structure. When connecting two battery packs, it is usually erected on two pole columns to connect the two battery packs. This setting form of the connection row will occupy too much longitudinal space of the battery pack, and the height of the battery cell structure inside the battery pack will be limited accordingly, thus reducing the energy density of the battery pack.

[0004] The connection row in the related art occupies more longitudinal space, resulting in a lower energy density of the battery pack. Summary of the Utility Model

[0005] The embodiment of the utility model provides a connection row structure and a battery module, which can solve the problem that the connection row in the prior art occupies more longitudinal space and leads to a lower energy density of the battery pack. The technical solution is as follows:

[0006] In a first aspect, a connection row structure includes: a connection row,

[0007] The connection row is a square sheet structure, the connection row includes a first plate surface and a second plate surface which are opposite to each other, a bending part is arranged in the middle of the connection row, the bending part is arranged along the width direction of the connection row, the bending part protrudes from the second plate surface, and a groove-shaped structure is formed on the first plate surface. On the second plate surface, pole column installation grooves are opened on both sides of the bending part, and a welding hole is opened at the center of the pole column installation groove.

[0008] Optionally, there are multiple bending parts, and the multiple bending parts are arranged at intervals along the length direction of the connection row.

[0009] Optionally, the multiple bending parts divide the connection row into a first connection piece and a second connection piece, and the first connection piece and the second connection piece are symmetrically arranged along the multiple bending parts.

[0010] Optionally, stress grooves are provided at the ends of the bending parts.

[0011] Optionally, the depth of the pole column installation groove is 0.5 - 2 mm.

[0012] Optionally, the pole column installation groove is a circular groove.

[0013] Optionally, the pole mounting groove is a square groove.

[0014] In a second aspect, a battery module includes the foregoing connection row structure, and further includes a plurality of battery packs arranged side by side. The battery packs include positive poles and negative poles, and the two pole mounting grooves respectively cover the positive poles and the negative poles of two adjacent battery packs.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present invention at least include:

[0016] For a connection row structure and a battery module provided by an embodiment of the present invention, by providing a bending portion in the middle of the connection row, the bending portion protrudes from the second plate surface. When the connection row connects two battery packs, the second plate surface is attached to the battery pack. Since the bending portion bends towards the battery pack and occupies the space between the pole and the battery top cover, the longitudinal occupied space of the whole package structure is reduced. At the same time, when the whole package is subjected to longitudinal vibration or mechanical impact, the bending portion is used to relieve the force to prevent the connection row from breaking. By providing the pole mounting groove, when the connection row connects two battery packs, the poles of the battery pack are arranged in the pole mounting groove, thereby further reducing the longitudinal occupied space of the whole package, and effectively solving the problem that the connection row in the prior art occupies more longitudinal space, resulting in a lower energy density of the battery pack. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the connection row structure provided by the embodiment of the present invention;

[0019] Figure 2 It is a front view schematic diagram of the connection row structure provided by the embodiment of the present invention;

[0020] Figure 3 It is a bottom view schematic diagram of a connection row structure provided by the embodiment of the present invention;

[0021] Figure 4 It is a bottom view schematic diagram of another connection row structure provided by the embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of the battery module structure provided by the embodiment of the present invention.

[0023] In the figure: 1 - connection row; 101 - first connection piece; 102 - second connection piece; 11 - first plate surface; 12 - second plate surface; 13 - bending part; 14 - welding hole; 15 - pole post mounting groove; 16 - stress groove; 2 - battery pack; 21 - positive pole post; 22 - negative pole post. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will further describe in detail the implementation manners of the present utility model with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic structural view of a connection row provided by an embodiment of the present utility model; Figure 2 It is a front view schematic structural view of a connection row provided by an embodiment of the present utility model; Figure 3 It is a bottom view schematic structural view of a connection row provided by an embodiment of the present utility model; Figure 4 It is another bottom view schematic structural view of a connection row provided by an embodiment of the present utility model; Figure 5 It is a schematic structural view of a battery module provided by an embodiment of the present utility model. As Figures 1 to 5 A connection row structure shown includes: a connection row 1, the connection row 1 is a square sheet-like structure, the connection row 1 includes opposite first plate surface 11 and second plate surface 12, a bending part 13 is arranged in the middle of the connection row 1, the bending part 13 is arranged along the width direction of the connection row 1, the bending part 13 protrudes from the second plate surface 12 and forms a groove-type structure on the first plate surface 11, on the second plate surface 12, pole post mounting grooves 15 are opened on both sides of the bending part 13, and a welding hole 14 is opened at the center of the pole post mounting groove 15.

[0026] Exemplarily, in the embodiment of the present utility model, the connection row 1 is used to connect the positive and negative electrodes of two battery packs, so that multiple battery packs are connected in series to increase the capacitance of the battery module. The height of the bending portion 13 protruding from the second plate surface 12 is 1.2 - 2 mm, and the span of the bending portion 13 can be adjusted according to actual use. When the battery pack is used in an automobile or various mobile scenarios, due to the movement between the battery packs, the connection row 1 will be affected by various stresses. A bending portion 13 is provided in the middle of the connection row 1. When relative displacement occurs between the two battery packs connected at both ends of the connection row 1, the stress effect can be reduced through the bending portion 13, thereby maintaining the structural strength of the connection row 1 and preventing the connection row 1 from breaking due to the stress effect, thus improving the stability of the connection row structure. At the same time, since the connection row 1 protrudes from the second plate surface 12, the connection row 1 contacts the top cover and other structures of the battery pack through the second plate surface 12, reducing the longitudinal space occupied by the overall structure of the battery module, thereby reducing the longitudinal space occupied by the battery module and increasing the energy density of the battery pack. A pole installation groove 15 is provided on the connection row 1. The poles on the battery pack are usually structures protruding from the battery surface. Compared with directly arranging the connection row on the poles of the battery pack in the traditional structure, in this embodiment, the connection row 1 covers the poles of the battery pack through the pole installation groove 15, reducing the longitudinal space occupied by the connection row 1 and further increasing the energy density of the battery pack. After the pole installation groove 15 and the poles of the battery pack are combined, the connection row 1 and the poles are welded and fixed through the welding holes 14 to complete the assembly of the battery module structure. On the other hand, due to the provision of the pole installation groove 15, the bus bar assembly can be very conveniently assembled with the battery module without the need for additional structural design for positioning and assembly, which not only improves the assembly efficiency but also reduces the production cost.

[0027] A connection row structure and a battery module provided by an embodiment of the present utility model, by providing a bending portion 13 in the middle of the connection row 1, with the bending portion 13 protruding from the second plate surface 12. When the connection row connects two battery packs, the second plate surface 12 is attached to the battery pack. Since the bending portion 13 bends towards the battery pack direction, the space occupied is the space between the pole and the battery top cover, reducing the longitudinal space occupied by the overall package structure. At the same time, when the overall package is subjected to longitudinal vibration or mechanical shock, the bending portion 13 is used to relieve the force and prevent the connection row 1 from breaking. By providing the pole installation groove 15, when the connection row 1 connects two battery packs, the poles of the battery pack are arranged in the pole installation groove 15, further reducing the longitudinal space occupied by the overall package and effectively solving the problem in the prior art that the connection row occupies more longitudinal space, resulting in a lower energy density of the battery pack.

[0028] Optionally, a plurality of bending portions 13 are provided, and the plurality of bending portions 13 are arranged at intervals along the length direction of the connection row 1.

[0029] Illustratively, in an embodiment of the utility model, the intervals between the multiple bending portions 13 can be adjusted according to actual usage conditions. By providing multiple bending portions 13, the stress on the connecting row 1 during movement can be further weakened, thereby making the bending portions 13 less susceptible to damage by external forces, further improving the stability of the connecting row structure.

[0030] Optionally, the plurality of bending portions 13 divide the connection row 1 into a first connection sheet 101 and a second connection sheet 102 , and the first connection sheet 101 and the second connection sheet 102 are symmetrically arranged along the plurality of bending portions 13 .

[0031] Exemplarily, in the embodiment of the utility model, the multiple bending portions 13 are regarded as a whole, and the first connecting piece 101 and the second connecting piece 102 are symmetrically arranged along the multiple bending portions 13, that is, the multiple bending portions 13 are set in the middle of the connecting row 1, so that when the connecting row 1 is subjected to external force from both ends of the connecting row 1, the bending portions 13 bear the force more evenly, further preventing the bending portions 13 from being damaged by external force, thereby further improving the stability of the connecting row structure.

[0032] Optionally, a stress groove 16 is formed at the end of the bending portion 13 .

[0033] Illustratively, in an embodiment of the utility model, stress grooves 16 are provided at both ends of the bending portion 13, which can provide a position for releasing internal stress in the middle part of the bending portion 13, thereby reducing the stress of the connecting row 1 under various working conditions of the battery pack, and further preventing the bending portion 13 from being damaged by external forces, thereby further improving the stability of the connecting row structure.

[0034] Optionally, the depth of the pole mounting groove 15 is 0.5-2 mm.

[0035] For example, in an embodiment of the utility model, the pole of the battery pack is usually 0.5-2mm, and the depth of the pole mounting groove 15 is set to 0.5-2mm, so as to ensure that the pole mounting groove 15 is completely in contact with the pole of the battery pack, thereby ensuring that the battery module occupies the smallest space in the longitudinal direction, thereby improving the energy density of the battery pack.

[0036] Optionally, the pole mounting groove 15 is a circular groove.

[0037] For example, in the embodiment of the present utility model, Figure 3 As shown, the pole mounting groove 15 is a circular groove, which is used to adapt to the battery pack with a circular pole, so that the pole mounting groove 15 can limit the pole of the battery pack, and then the pole mounting groove 15 can fully cooperate with the pole of the battery pack to reduce the movement between the pole mounting groove 15 and the pole of the battery pack during movement, thereby further improving the stability of the connection row structure.

[0038] Optionally, the pole mounting groove 15 is a square groove.

[0039] Exemplarily, in the embodiment of the present utility model, as Figure 4 shown, the pole mounting groove 15 is a square groove, which is used to adapt to the battery pack with square poles, so that the pole mounting groove 15 plays a limiting role on the poles of the battery pack, and further enables the pole mounting groove 15 to be fully matched with the poles of the battery pack, so as to reduce the crosstalk between the pole mounting groove 15 and the poles of the battery pack during the movement process, thereby further improving the stability of the present connection row structure.

[0040] A battery module includes the foregoing connection row structure, and further includes a plurality of battery packs 2. The plurality of battery packs 2 are arranged side by side. The battery pack 2 includes a positive pole 21 and a negative pole 22. Two pole mounting grooves 15 are respectively covered on the positive pole 21 and the negative pole 22 of two adjacent battery packs 2.

[0041] Exemplarily, in the embodiment of the present utility model, the connection row 1 is used to connect the positive pole 21 of the battery pack 2 and the negative pole 22 of another battery pack, so that a plurality of battery packs 2 are connected in series to increase the capacitance of the battery module. The pole mounting groove 15 is matched with the shapes of the positive pole 21 and the negative pole 22. During the installation process, the pole mounting groove 15 is installed on the positive pole 21 and the negative pole 22. The bent portion 13 is located between two adjacent battery packs 2. When crosstalk occurs between two adjacent battery packs 2, the external force received by the connection row 1 is weakened through the bent portion 13, preventing the connection row 1 from being damaged by the external force, thereby improving the stability of the present battery module.

[0042] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] The above are only alternative embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A connecting row structure, characterized in that: include: Connecting row (1), The connection row (1) is a rectangular sheet structure, comprising a first plate surface (11) and a second plate surface (12) opposite to each other, a bending portion (13) is provided in the middle of the connection row (1), the bending portion (13) is provided along the width direction of the connection row (1), the bending portion (13) is protruding from the second plate surface (12), and a groove-shaped structure is formed on the first plate surface (11), and pole mounting grooves (15) are provided on both sides of the bending portion (13) on the second plate surface (12), and a welding hole (14) is provided in the center of the pole mounting groove (15).

2. A connection row structure according to claim 1, characterized in that: A plurality of the bending portions (13) are provided, and the plurality of the bending portions (13) are arranged at intervals along the length direction of the connection row (1).

3. A connection row structure according to claim 2, characterized in that: The plurality of bent portions (13) divide the connection row (1) into a first connection sheet (101) and a second connection sheet (102); the first connection sheet (101) and the second connection sheet (102) are symmetrically arranged along the plurality of bent portions (13).

4. A connection row structure according to claim 1, characterized in that: A stress groove (16) is provided at the end of the bent portion (13).

5. A connection row structure according to claim 1, characterized in that: The depth of the pole mounting groove (15) is 0.5-2 mm.

6. A connection row structure according to claim 1, characterized in that: The pole mounting groove (15) is a circular groove.

7. A connection row structure according to claim 1, characterized in that: The pole mounting groove (15) is a square groove.

8. A battery module, comprising a connecting row structure according to any one of claims 1 to 7, characterized in that: It also includes a plurality of battery packs (2), wherein the plurality of battery packs (2) are arranged side by side, the battery packs (2) include a positive electrode column (21) and a negative electrode column (22), and the two electrode column mounting grooves (15) are respectively covered on the positive electrode column (21) and the negative electrode column (22) of two adjacent battery packs (2).

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