A new busbar positioning structure for power battery modules

Abstract

The present invention discloses a new type of busbar positioning structure for a power battery module, comprising a positioning assembly, foam and a busbar assembly; the foam is arranged on the top of the positioning assembly; the top surface of the foam is an adhesive backing surface; the top surface of the foam is bonded with the busbar assembly; the foam and the busbar assembly together constitute a module busbar mounting module; the module busbar mounting module is used to be arranged on the pole at the top of the power battery module. The present invention discloses a new type of busbar positioning structure for a power battery module, which has a scientific structural design and can replace the design of the existing busbar plastic bracket, conveniently and reliably positioning the busbar, thereby reducing the design cost and manufacturing cost in the power battery module assembly process, and has great practical significance.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery modules, and in particular to a new busbar positioning structure for a power battery module. Background Art

[0002] At present, power battery modules (such as lithium-ion power battery modules) are widely used in large and medium-sized electric equipment such as electric vehicles, electric bicycles and electric tools, so the performance requirements for power battery modules are getting higher and higher.

[0003] For the power battery module, the pole of the power battery module needs to be welded with the busbar assembly. Before the busbar assembly is welded with the pole of the power battery module, it is a very important step in the power battery module assembly (PACK) process to position the busbar assembly on the power battery module in advance.

[0004] At present, busbar plastic brackets are generally used to position busbar components. However, due to the irregular and complex shapes of busbar components, the supporting structure of the existing busbar plastic brackets is also relatively complex, which requires designers to spend a lot of design time and increases design costs.

[0005] In addition, since the busbar plastic bracket needs to be molded during manufacturing, the mold and material costs are relatively expensive. Summary of the invention

[0006] The purpose of the present invention is to provide a new busbar positioning structure for a power battery module in view of the technical defects in the prior art.

[0007] To this end, the present invention provides a new busbar positioning structure for a power battery module, comprising a positioning component, foam and a busbar component;

[0008] A foam is disposed on the top of the positioning component;

[0009] The top surface of the foam is the adhesive-backed surface;

[0010] The top surface of the foam is bonded with a busbar assembly;

[0011] The foam and busbar assembly together form a module busbar mounting module;

[0012] The module busbar mounting module is used to be installed on the pole at the top of the power battery module;

[0013] For the positioning assembly, it includes a positioning plate, a busbar positioning pin and a foam positioning pin;

[0014] Two foam positioning pins are respectively arranged on the front and rear sides of the top right end of the horizontally distributed positioning plate;

[0015] The top of the horizontally distributed positioning plate is provided with multiple rows of busbar positioning pins distributed laterally;

[0016] Each row of busbar locating pins includes a plurality of busbar locating pins arranged at equal intervals;

[0017] A foam installation and removal notch is provided on the front and rear sides of the top of the positioning plate and the middle of the right side;

[0018] The foam has a plurality of through holes for avoiding the poles of the power battery module.

[0019] A plurality of power battery module pole avoidance through holes are arranged corresponding to the plurality of poles on the top of the power battery module;

[0020] For the busbar assembly, it includes a plurality of busbars and a temperature and voltage collection harness;

[0021] Each bus is connected to a temperature and voltage collection harness;

[0022] There are two welding peepholes at both ends of each busbar.

[0023] Preferably, the top left side and the front and rear sides of the positioning plate, except for the foam installation and removal notch, are also surrounded by a limiting boss;

[0024] A limiting protrusion is provided at the front and rear ends of the top right side of the positioning plate respectively;

[0025] The limiting protrusions are located at the front and rear sides of the foam installation and removal notch on the top right side of the positioning plate;

[0026] The space between the inner side of the limiting boss and the inner side of the limiting convex block at the top of the positioning plate serves as a foam limiting groove;

[0027] The foam limiting groove is used to limit the foam.

[0028] Preferably, the shape and size of the avoidance through hole of the power battery module pole corresponds to the shape and size of the cross section of the pole.

[0029] Preferably, a circular positioning hole and a waist-shaped positioning hole are respectively opened at the front and rear ends of the top left side of the foam;

[0030] The circular positioning hole and the waist-shaped positioning hole are arranged correspondingly to the two foam positioning pins on the top of the positioning plate and are coaxially matched;

[0031] The two foam positioning pins on the top of the positioning plate are used to position the foam by inserting into the circular positioning hole and the waist-shaped positioning hole.

[0032] Preferably, the welding peepholes on the plurality of busbars are arranged correspondingly to the plurality of busbar positioning pins in the positioning assembly and are coaxially matched;

[0033] The busbar positioning pin in the positioning assembly is used to realize the positioning of the busbar in the busbar assembly by inserting into the welding peephole on the busbar.

[0034] Preferably, the welding peepholes on the multiple busbars are also arranged corresponding to the multiple poles on the top of the power battery module, and are also arranged corresponding to the multiple power battery module pole avoidance through holes on the foam.

[0035] Preferably, the power battery module comprises a battery module body;

[0036] The battery module body includes multiple square power batteries;

[0037] Sheet metal parts are respectively provided on the front and rear sides and the bottom of the battery module body;

[0038] Each of the two ends of the top of each square power battery is provided with a pole;

[0039] A pole peephole is provided at the top center of each pole;

[0040] The pole peep holes on the poles of the plurality of square power batteries are arranged correspondingly to the plurality of welding peep holes on the plurality of busbars in the busbar assembly and are coaxially matched.

[0041] Preferably, when the module bus mounting module needs to be installed on the pole on the top of the square power battery, the pole on the top of the square power battery passes upward through the corresponding power battery module pole avoidance through hole and contacts with the bottom surface of the bus in the bus assembly to achieve conductive connection.

[0042] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a new positioning structure for a busbar of a power battery module, which has a scientific structural design and can replace the design of the existing busbar plastic bracket, thereby conveniently and reliably positioning the busbar, thereby reducing the design cost and manufacturing cost in the assembly process of the power battery module, and has great practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of the three-dimensional structure of a new busbar positioning structure for a power battery module provided by the present invention;

[0044] Figure 2 A structural schematic diagram of a positioning component in a new busbar positioning structure for a power battery module provided by the present invention;

[0045] Figure 3 A schematic diagram of the structure of foam in a new busbar positioning structure for a power battery module provided by the present invention;

[0046] Figure 4 A schematic structural diagram of a busbar assembly in a new busbar positioning structure for a power battery module provided by the present invention;

[0047] Figure 5 A schematic diagram of the appearance structure of a module busbar mounting module composed of foam and busbar components in a new busbar positioning structure for a power battery module provided by the present invention;

[0048] Figure 6 A schematic diagram of a three-dimensional structure of a power battery module that needs to be positioned and installed is provided for a new busbar positioning structure for a power battery module provided by the present invention;

[0049] Figure 7 A new busbar positioning structure for a power battery module provided by the present invention and a schematic diagram of the installation state of a power battery module. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0053] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0054] See also Figures 1 to 7 The present invention provides a new type of busbar positioning structure, which is used for positioning the busbar component on the power battery module before welding the busbar component to the power battery module pole. The new type of busbar positioning structure specifically includes: a positioning component 1, a foam 2 and a busbar component 3;

[0055] Foam 2, arranged on the top of the positioning component 1;

[0056] The top surface of the foam 2 is the adhesive-backed surface (i.e., the surface with adhesive);

[0057] That is, the adhesive backing surface of foam 2 faces upward;

[0058] The top surface of the foam 2 is bonded with a busbar component 3;

[0059] The foam 2 and the busbar assembly 3 together form a module busbar installation module, see Figure 5 As shown;

[0060] The module busbar mounting module is used to be arranged on the pole at the top of the power battery module 4 .

[0061] In the present invention, the specific implementation is as follows: Figure 2 As shown, the positioning assembly 1 includes a positioning plate 11, a busbar positioning pin 12 and a foam positioning pin 13;

[0062] Two foam positioning pins 13 are respectively arranged on the front and rear sides of the top right end of the horizontally distributed positioning plate 11;

[0063] The top of the horizontally distributed positioning plate 11 is provided with multiple rows of busbar positioning pins distributed laterally;

[0064] Each row of busbar positioning pins includes a plurality of busbar positioning pins 12 arranged at equal intervals;

[0065] A foam installation and removal notch 14 is respectively provided on the front and rear sides of the top and the middle right side of the positioning plate 11, which is used to facilitate the staff to access the foam 2, thereby inserting and removing the foam 2, so as to avoid the flexible, low-hardness foam 2 from being damaged or deformed due to excessive force applied by the staff.

[0066] In specific implementation, the top left side and the front and rear sides of the positioning plate 11 are surrounded by a limiting boss 15 except for the foam installation and removal notch 14;

[0067] A limiting protrusion 16 is provided at the front and rear ends of the top right side of the positioning plate 11;

[0068] The limiting protrusion 16 is located at the front and rear sides of the foam installation and removal notch 14 on the top right side of the positioning plate 11;

[0069] The space between the inner side of the limiting boss 15 and the inner side of the limiting bump 16 at the top of the positioning plate 11 serves as a foam limiting groove;

[0070] The foam limiting groove is used to limit the foam 2.

[0071] In a specific implementation, the number of the busbar positioning pins 12 is eighteen, and the number of the foam positioning pins 13 is two.

[0072] In the present invention, the specific implementation is as follows: Figure 3 As shown, a plurality of power battery module pole avoidance through holes 22 are opened on the foam 2 (for example, there may be twenty power battery module pole avoidance through holes 22, which may be circular holes);

[0073] A plurality of power battery module pole avoidance through holes 22 are arranged corresponding to a plurality of poles on the top of the power battery module 4 to be installed by the module busbar installation module;

[0074] The shape and size of the power battery module pole avoidance through hole 22 corresponds to (is equal to or slightly larger than) the cross-sectional shape and size of the pole.

[0075] In specific implementation, a circular positioning hole 211 and a waist-shaped positioning hole 212 are respectively opened at the front and rear ends of the top left side of the foam 2;

[0076] The circular positioning hole 211 and the waist-shaped positioning hole 212 are arranged correspondingly to the two foam positioning pins 13 on the top of the positioning plate 11 and are coaxially matched;

[0077] The two foam positioning pins 13 on the top of the positioning plate 11 are used to position the foam 2 by being inserted into the circular positioning hole 211 and the waist-shaped positioning hole 212 .

[0078] It should be noted that the two foam positioning pins 13 are coaxially matched with the positioning holes (ie, the circular positioning hole 211 and the waist-shaped positioning hole 212 ) on the foam 2 to achieve precise positioning of the foam 2 on the positioning component 1 .

[0079] In a specific implementation, the foam 2 is preferably PU foam.

[0080] In the present invention, for specific implementation, see Figure 4 As shown, a busbar assembly 3 includes a plurality of busbars 31 and a temperature and voltage collection harness 32;

[0081] Each bus bar 31 is connected to a temperature and voltage collection harness 32;

[0082] Two welding peepholes 311 are respectively formed at both ends of each busbar 31;

[0083] The welding peepholes 311 on the plurality of busbars 31 are arranged corresponding to the plurality (eighteen for example) of busbar positioning pins 12 in the positioning assembly 1 and are coaxially matched;

[0084] The busbar positioning pin 12 in the positioning assembly 1 is used to achieve positioning of the busbar 31 in the busbar assembly 3 by being inserted into the welding peephole 311 on the busbar 31.

[0085] It should also be noted that the multiple (for example, eighteen) busbar positioning pins 12 in the positioning component 1 are coaxially matched with the multiple (for example, eighteen) welding peepholes 311 in the busbar component 3 to achieve precise positioning of the busbar component 3 on the positioning component 1.

[0086] In a specific implementation, the welding peepholes 311 on the multiple busbars 31 are also arranged corresponding to the multiple poles on the top of the power battery module 4, and are also arranged corresponding to the multiple power battery module pole avoidance through holes 22 on the foam 2.

[0087] In a specific implementation, there are nine busbars 31 , and each busbar 31 has two welding peepholes 311 , so there are a total of eighteen welding peepholes 311 on the busbar assembly 3 .

[0088] In the present invention, in a specific implementation, after the foam 2 is positioned on the top of the positioning component 1, the busbar component 3 is assisted in positioning by the busbar positioning pin 12 in the positioning component 1. At this time, the busbar component 3 is entirely pasted on the foam 2 with the adhesive backing surface on the top to form a module busbar installation module, such as Figure 5 shown.

[0089] In the present invention, for specific implementation, see Figure 6 and Figure 7 As shown, the power battery module 4 includes a battery module body;

[0090] The battery module body includes a plurality of (e.g., ten) square power batteries 41 arranged in parallel;

[0091] The front and rear sides and the bottom of the battery module body are respectively provided with sheet metal parts 42 (specifically, side guard plates and bottom support plates);

[0092] Each of the two ends of the top of the square power battery 41 is provided with a pole respectively;

[0093] A pole peephole 411 is provided at the top center of each pole;

[0094] The pole peep holes 411 on the poles of the plurality of square power batteries 41 are arranged correspondingly to the plurality of welding peep holes 311 on the plurality of busbars 31 in the busbar assembly 3, and are coaxially matched;

[0095] When the module busbar mounting module needs to be installed on the pole at the top of the square power battery 41 (at this time, the foam 2 is taken out of the positioning component 1 in advance and the positioning component 1 is taken away), the pole at the top of the square power battery 41 passes upward through the corresponding power battery module pole avoidance through hole 22, and then contacts the bottom surface of the busbar 31 in the busbar assembly 3 to achieve conductive connection.

[0096] It should be noted that, for the power battery module 4 , when there are ten square power batteries 41 , one total positive pole peep hole and one total negative pole peep hole are removed, so there are a total of eighteen pole peep holes 411 on the power battery module 4 .

[0097] It should be noted that, in a specific implementation, the eighteen welding peep holes 311 on the busbar assembly 3 in the module busbar installation module are coaxially matched with the eighteen pole peep holes 411 in the power battery module 4, so that the busbar assembly 3 can be accurately positioned in the power battery module 4, such as Figure 7 shown.

[0098] In order to more clearly understand the technical solution of the present invention, the installation operation process of the present invention is described below.

[0099] First, the foam 2 is positioned in the positioning plate 11 of the positioning assembly 1, with the adhesive backing of the foam 2 facing upwards;

[0100] Then, the busbar assembly 3 is assisted in positioning by the busbar positioning pins 12 in the positioning assembly 1, and finally pasted on the foam 2 to form a module busbar installation module, and then the module busbar installation module is taken out from the positioning assembly 1;

[0101] Then, the module busbar is installed in the module, and the welding peephole 311 on the busbar 31 and the pole peephole 411 on the top of the square power battery 41 are coaxially matched, so as to realize the positioning of the busbar assembly 3 in the power battery module 4. In this process, it is equivalent to replacing the traditional busbar plastic bracket with the foam 2 with adhesive backing, which greatly reduces the assembly cost of the power battery module.

[0102] To sum up, compared with the prior art, the present invention provides a new positioning structure for a busbar for a power battery module, which has a scientific structural design and can replace the design of the existing busbar plastic bracket, so as to conveniently and reliably position the busbar, thereby reducing the design cost and manufacturing cost in the assembly process of the power battery module, and has great practical significance.

[0103] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A new busbar positioning structure for a power battery module, characterized in that: It comprises a positioning component (1), foam (2) and a busbar component (3); Foam (2), arranged on the top of the positioning component (1); The top surface of the foam (2) is the adhesive backing surface; The top surface of the foam (2) is bonded with a busbar assembly (3); The foam (2) and the bus assembly (3) together form a module bus installation module; A module busbar mounting module, used for being arranged on a pole at the top of a power battery module (4); The positioning assembly (1) comprises a positioning plate (11), a busbar positioning pin (12) and a foam positioning pin (13); Two foam positioning pins (13) are respectively arranged on the front and rear sides of the top right end of the horizontally distributed positioning plate (11); A plurality of rows of busbar positioning pins distributed laterally are arranged on the top of the horizontally distributed positioning plate (11); Each row of bus bar positioning pins comprises a plurality of bus bar positioning pins (12) arranged at equal intervals; A foam installation and removal notch (14) is respectively provided on the front and rear sides and the middle of the right side of the top of the positioning plate (11); The foam (2) is provided with a plurality of power battery module pole avoidance through holes (22); A plurality of power battery module pole avoidance through holes (22) are arranged corresponding to the plurality of poles on the top of the power battery module (4); The busbar assembly (3) comprises a plurality of busbars (31) and a temperature and voltage collection harness (32); Each bus bar (31) is connected to a temperature and voltage collection harness (32); Two welding peepholes (311) are respectively provided at both ends of each busbar (31); A circular positioning hole (211) and a waist-shaped positioning hole (212) are respectively formed at the front and rear ends of the top left side of the foam (2); The circular positioning hole (211) and the waist-shaped positioning hole (212) are arranged correspondingly to the two foam positioning pins (13) on the top of the positioning plate (11) and are coaxially matched; Two foam positioning pins (13) on the top of the positioning plate (11) are used to achieve positioning of the foam (2) by inserting into the circular positioning hole (211) and the waist-shaped positioning hole (212); The welding peepholes (311) on the plurality of busbars (31) are arranged corresponding to the plurality of busbar positioning pins (12) in the positioning assembly (1) and are coaxially matched; The busbar positioning pin (12) in the positioning assembly (1) is used to achieve positioning of the busbar (31) in the busbar assembly (3) by being inserted into a welding peephole (311) on the busbar (31).

2. The novel busbar positioning structure for a power battery module according to claim 1, characterized in that: The top left side and the front and rear sides of the positioning plate (11) are surrounded by a limiting boss (15) except for the foam installation and removal notch (14); A limiting protrusion (16) is provided at the front and rear ends of the top right side of the positioning plate (11); Limiting protrusions (16) are located at the front and rear sides of the foam installation and removal notch (14) on the top right side of the positioning plate (11); The space between the inner side of the limiting boss (15) and the inner side of the limiting protrusion (16) at the top of the positioning plate (11) serves as a foam limiting groove; The foam limiting groove is used to limit the foam (2).

3. The novel busbar positioning structure for a power battery module according to claim 1, characterized in that: The shape and size of the power battery module pole avoidance through hole (22) correspond to the shape and size of the cross section of the pole.

4. The novel busbar positioning structure for a power battery module according to claim 1, characterized in that: The welding peepholes (311) on the plurality of busbars (31) are also arranged corresponding to the plurality of poles on the top of the power battery module (4), and are also arranged corresponding to the plurality of power battery module pole avoidance through holes (22) on the foam (2).

5. The novel busbar positioning structure for a power battery module according to any one of claims 1 to 4, characterized in that: The power battery module (4) comprises a battery module body; The battery module body includes a plurality of square power batteries (41); The front and rear sides and the bottom of the battery module body are respectively provided with sheet metal parts (42); Each of the two ends of the top of the square power battery (41) is provided with a pole respectively; A pole peephole (411) is provided at the top center of each pole; The pole peep holes (411) on the poles of the plurality of square power batteries (41) are arranged correspondingly to the plurality of welding peep holes (311) on the plurality of busbars (31) in the busbar assembly (3), and are coaxially matched.

6. The novel busbar positioning structure for a power battery module according to claim 5, characterized in that: When it is necessary to install the module busbar mounting module onto the pole at the top of the square power battery (41), the pole at the top of the square power battery (41) passes upward through the corresponding power battery module pole avoidance through hole (22) and contacts the bottom surface of the busbar (31) in the busbar assembly (3) to achieve conductive connection.

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