CN217385761U - Battery module sampling terminal and pre-installation device - Google Patents

Abstract

The utility model provides a battery module sampling terminal, including weld part, pencil connecting portion and location portion, pencil connecting portion with location portion all with the weld part links to each other, the weld part is used for being connected with the battery module, pencil connecting portion are used for being connected with the pencil, location portion is used for the location of battery module sampling terminal when the welding. The utility model discloses a battery module sampling terminal can enough realize the stable connection between pencil and the battery module sampling terminal, can realize the location of battery module sampling terminal when the welding again to improve the connection precision between battery module sampling terminal and the busbar. The utility model also provides a pre-installation device.

Description

Battery module sampling terminal and pre-installation device

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a battery module sampling terminal and pre-installation device is related to.

Background

In the production process of the battery module of the electric automobile, the sampling device is required to be electrically connected with the battery module so as to acquire the voltage of the battery module. The sampling device is generally directly connected to the surface of a bus bar on the battery module through a sampling wire harness, so that the voltage of the battery module is acquired.

Because the design of present electric automobile battery module requires more and more high to energy density, and the volume is littleer and more, and the space of reserving for the sampling terminal is also littleer and more, can not carry out the connection of sampling point with the mode of screw lock connection. In the conventional copper wire welding method, the bus bar is made of aluminum and cannot be soldered, so that the copper wire and the bus bar need to be connected through a nickel sheet, and the connection method of nickel sheet connection has the defects of small welding spot formed in a narrow available space, weak stripping force and easy wire disconnection. Meanwhile, due to the fact that no positioning capacity exists between the sampling terminal and the bus bar in the welding process, installation deviation is large, and measurement accuracy and connection stability in the follow-up measurement process are affected to a certain degree.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery module sampling terminal can enough realize the stable connection between pencil and the battery module sampling terminal, can realize the location of battery module sampling terminal when the welding again to improve the connection accuracy between battery module sampling terminal and the busbar.

The utility model provides a battery module sampling terminal, including weld part, pencil connecting portion and location portion all link to each other with the weld part, the weld part is used for being connected with the battery module; the wire harness connecting part is used for being connected with a wire harness, and the positioning part is used for positioning the battery module sampling terminal during welding.

In an implementable manner, the wire harness connection portion includes a base body connected to the welding portion and a connection member connected to the base body, the connection member being used to connect the wire harness.

In an implementable manner, the base is formed by extending and protruding one end of the welding part, and the width of the base is not larger than that of the welding part.

In an implementable manner, the connector is provided with a through slot into which the wiring harness is inserted for connection of the wiring harness.

In an implementation manner, the wire harness includes a conductor and an insulating sheath covering the conductor, and the inner surface of the through groove is provided with a first protruding portion for connecting with the conductor after passing through the insulating sheath.

In an realizable mode, the inner surface of the through groove is further provided with a second protruding part which is used for penetrating into the insulating leather and is connected with the insulating leather; the depth of penetration of the second protruding portion into the wire harness is smaller than the depth of penetration of the first protruding portion.

In one realisable form, the connection comprises first and second connection portions arranged in segments; the first bulge is arranged on the first connecting part; and/or the second projection is provided on the second connection portion.

In one implementable form, the first boss and/or the second boss includes a cone-tip like structure.

In an implementable manner, the wire harness connecting portion and the positioning portion are respectively provided on opposite sides of the welded portion.

In an achievable form, the locating portion is a tongue plate structure formed extending from one side of the weld portion.

In an implementable manner, the wire harness connection portion, the positioning portion, and the welding portion are integrally formed.

The utility model also provides a preassembling device for preassembling the battery module sampling terminal; the preassembling device comprises a positioning plate, and a mounting hole for accommodating the battery module sampling terminal is formed in the positioning plate; when the battery module sampling terminal is preassembled on the preassembling device, the welding part is located in the mounting hole, and the positioning part is abutted against the positioning plate.

In an implementation manner, the positioning plate is provided with a limiting portion, and the limiting portion is used for limiting the wiring harness.

In an implementation manner, the positioning plate is provided with a clamping portion, and the clamping portion is used for clamping the battery module sampling terminal.

The utility model provides a battery module sampling terminal, through setting up pencil connecting portion, pencil connecting portion can be connected with the pencil is stable to realize the stable connection between pencil and the battery module sampling terminal, reduce the risk of taking off the line; simultaneously, through setting up location portion, location portion can realize the location of battery module sampling terminal when the welding to improve the connection precision between battery module sampling terminal and the busbar, and make things convenient for welding operation. The utility model also provides a pre-installation device for location installation sampling terminal has good installation stability, thereby promotes the connection precision of sampling terminal and busbar, makes things convenient for welding operation and promotes the sampling effect.

Drawings

Fig. 1 is the embodiment of the present invention provides a schematic structural diagram of a battery module sampling terminal.

Fig. 2 is the embodiment of the utility model provides an in the embodiment after battery module sampling terminal is connected with the pencil the schematic structure diagram.

Fig. 3 is an axial cross-sectional view of fig. 2.

Fig. 4 is a schematic radial cross-section of fig. 2 at a first connection.

Fig. 5 is the structural schematic diagram of the embodiment of the present invention after the battery module sampling terminal is pre-installed on the pre-installation device.

Fig. 6 is a schematic structural view of the battery module sampling terminal connected to the bus bar according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of a battery module sampling terminal according to another embodiment of the present invention.

Fig. 8 is a schematic structural view of a battery module sampling terminal connected to a wire harness according to another embodiment of the present invention.

Fig. 9 is an axial cross-sectional view of fig. 8.

Fig. 10 is a schematic radial cross-section of fig. 8.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms of orientation of the upper, lower, left, right, front, back, top, bottom, etc. (if any) referred to in the specification and claims of the present invention are defined as the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the sake of clarity and convenience in describing the technical solutions. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

As shown in fig. 1 to 3, the embodiment of the present invention provides a battery module sampling terminal 1, which is made of metal material, and includes a welding portion 11, a wire harness connecting portion 12 and a positioning portion 13, wherein the wire harness connecting portion 12 and the positioning portion 13 are all connected to the welding portion 11, and the wire harness connecting portion 12, the positioning portion 13 and the welding portion 11 are integrally formed. Wherein, the welding part 11 is used for connecting with a battery module (not shown); the harness connection portion 12 is used for connection with the harness 2, and the positioning portion 13 is used for positioning the battery module sampling terminal 1 at the time of welding.

Specifically, in the present embodiment, the welding portion 11 is used for welding and connecting with the bus bar 4 (please refer to fig. 6 for the specific structure of the bus bar 4) on the battery module; the welding part 11 is of a sheet-shaped structure, so that a large area of contact with the surface of the bus bar 4 can be realized, the battery module sampling terminal 1 and the bus bar 4 are firmly welded, and the problem that the welding part 11 is peeled off from the bus bar 4 is reduced. The wire harness connecting part 12 is used for being connected with the wire harness 2 so as to realize the electric connection and fixation between the battery module sampling terminal 1 and the wire harness 2, thereby solving the wire disconnection problem; the wire harness 2 is used for connecting an external sampling device, thereby transmitting the sampling information of the battery to the sampling device. The positioning part 13 is used for accurately positioning the battery module sampling terminal 1 during welding (the positioning part 13 is preferably in lap joint with a pre-assembly device 3 to be described later to realize positioning, and can also be in lap joint with the edge structure of the busbar 4 when the pre-assembly device 3 is not used), and meanwhile, the battery module sampling terminal 1 can be orderly placed, so that the connection precision between the battery module sampling terminal 1 and the busbar 4 is improved, and the welding operation is convenient.

As shown in fig. 2, as an embodiment, the positioning portion 13 is a bent tongue plate structure formed by bending and extending from one end of the welding portion 11, so as to facilitate overlapping with the pre-assembly device 3 or the bus bar 4 for positioning.

As shown in fig. 1 and 2, as an embodiment, a wire harness connection portion 12 and a positioning portion 13 are respectively disposed on opposite sides of the welding portion 11, the wire harness connection portion 12 is disposed on a tail portion of the battery module sampling terminal 1, and the positioning portion 13 is disposed on a head portion of the battery module sampling terminal 1. Of course, in other embodiments, the positioning portion 13 may be provided in plurality, and may also be provided in other directions of the battery module sampling terminal 1.

In one embodiment, the battery module sampling terminal 1 is made of an aluminum material having the same material as the bus bar 4, so as to improve the welding firmness between the battery module sampling terminal 1 and the bus bar 4.

As shown in fig. 1 and 2, the wire harness connection portion 12 includes a base 121 connected to the welding portion 11 and a connection member 122 connected to the base 121, and the connection member 122 is used to connect the wire harness 2.

As shown in fig. 1 and 2, as one embodiment, the connecting member 122 is provided with a through groove 1220 into which the wire harness 2 is inserted for connecting the wire harness 2. When the wire harness 2 is inserted into the through groove 1220 of the connecting member 122, the connecting member 122 is pressed to firmly hoop the wire harness 2, and the connecting member 122 is snapped onto the wire harness 2, thereby achieving stable connection of the connecting member 122 and the wire harness 2.

As shown in fig. 1 and 2, in one embodiment, the base 121 is formed by extending and protruding one end of the welding portion 11, and the width of the base 121 is not greater than the width of the welding portion 11.

As shown in fig. 1 and 2, in one embodiment, the width of the base 121 is smaller than the width of the welded portion 11.

As shown in fig. 1 and 2, in one embodiment, the connecting member 122 is an open ring structure having an opening, so that the connecting member 122 is easily pressed to clamp the wire harness 2. As another embodiment, as shown in fig. 7 and 8, the connecting member 122 may be a closed tubular structure.

As shown in fig. 1 to 4, as an embodiment, the wire harness 2 includes a conductor 22 and an insulating sheath 21 covering the conductor 22, an inner surface of the through slot 1220 is provided with a first protruding portion 1223, and the first protruding portion 1223 is used for connecting with the conductor 22 (the conductor 22 in the wire harness 2 may be a copper wire or the like) in the wire harness 2 after passing through the insulating sheath 21 on the outer surface of the wire harness 2; the inner surface of the through-groove 1220 is further provided with a second projection 1224, and the second projection 1224 is used to pierce the insulation sheath 21 of the outer surface of the wire harness 2 and is connected to the insulation sheath 21. The projection length of the second projection parts 1224 is smaller than that of the first projection parts 1223, and the penetration depth of the second projection parts 1224 into the wiring harness 2 is smaller than that of the first projection parts 1223.

As shown in fig. 1 to 4, as an embodiment, the connection member 122 includes a first connection portion 1221 and a second connection portion 1222 provided in a segmented manner; the first projecting portion 1223 is provided on the first connecting portion 1221, and the second projecting portion 1224 is provided on the second connecting portion 1222.

Specifically, in the present embodiment, each of the first connecting portion 1221 and the second connecting portion 1222 can perform a pinching function on the wire harness 2, while combining the biting function of the first projecting portion 1223 and the second projecting portion 1224, so that the connecting member 122 can be firmly connected with the wire harness 2, thereby preventing a wire separation. Meanwhile, the first protruding portion 1223 can penetrate through the insulating sheath 21 on the outer surface of the wire harness 2 and then be connected to the conductor 22 inside the wire harness 2, so that the electrical connection between the battery module sampling terminal 1 and the wire harness 2 is realized. The structure has the advantages of convenience in installation, stability and reliability.

As shown in fig. 1 and 3, in one embodiment, the first connection portions 1221 and the second connection portions 1222 are spaced apart from each other in the longitudinal direction of the base 121, and the first connection portions 1221 are located on the side of the second connection portions 1222 closer to the welding portion 11.

As another embodiment, as shown in fig. 7 to 10, the connecting member 122 is a unitary tubular structure, and the first and second protrusions 1223 and 1224 are spaced apart from each other on the inner surface of the connecting member 122.

As shown in fig. 3 and 4, as an embodiment, the first projection 1223 and the second projection 1224 each include a tapered structure so as to facilitate puncturing of the insulation sheath 21 on the outer surface of the wiring harness 2. The first and second projections 1223 and 1224 may be triangular (preferred), multi-fold teeth, etc. in cross-section.

Specifically, the first and second bosses 1223, 1224 may be entirely cone-tip shaped structures; it is also possible that the portion thereof for piercing the wiring harness 2 is a tapered structure and the other portion is provided with a structure that is difficult to pierce (for example, lateral projections are provided), so that the piercing depth of the first projecting portion 1223 and the second projecting portion 1224 can be controlled.

As shown in fig. 3 and 4, in one embodiment, the first protrusion 1223 and the second protrusion 1224 are provided in plural to enhance the biting force and improve the coupling stability. The plurality of first protrusions 1223 are provided at intervals in a circumferential direction of the first connecting portion 1221, and the plurality of second protrusions 1224 are provided at intervals in a circumferential direction of the second connecting portion 1222. Of course, in other embodiments, the first and second bosses 1223, 1224 may each be generally annular in configuration or have a radially aligned distribution, etc.

As shown in fig. 5 and fig. 6, the embodiment of the present invention further provides a pre-assembling device 3 for pre-assembling the battery module sampling terminal 1. This pre-installation device 3 not only can improve welding efficiency, can improve the welding precision between battery module sampling terminal 1 and busbar 4 through its pre-installation locate function moreover.

As shown in fig. 5, the preassembly apparatus 3 includes a positioning plate 31, wherein the positioning plate 31 is provided with a mounting hole 311 for receiving the battery module sampling terminal 1; when the battery module sampling terminal 1 is pre-mounted on the pre-mounting device 3, the welding portion 11 of the battery module sampling terminal 1 is positioned in the mounting hole 311.

As shown in fig. 5, as an embodiment, a clamping portion 33 is disposed on the positioning plate 31, one end of the clamping portion 33 is connected to the positioning plate 31, and the other end extends into the mounting hole 311. The clamping portion 33 is used for clamping the battery module sampling terminal 1 to prevent the battery module sampling terminal 1 from moving or falling off during welding.

As shown in fig. 5, as an embodiment, the clamping portion 33 includes a first clamping portion 331 and a second clamping portion 332, and the first clamping portion 331 and the second clamping portion 332 are respectively located at two opposite sides of the mounting hole 311, so as to clamp two sides of the battery module sampling terminal 1.

As shown in fig. 2 and 5, as an embodiment, the positioning portion 13 is a bent tongue-shaped plate structure formed by bending and extending from one end of the welding portion 11; when the battery module sampling terminal 1 is preassembled on the pre-assembly device 3, the positioning portion 13 abuts against the positioning plate 31, and the clamping action of the clamping portion 33 is combined, so that the battery module sampling terminal 1 is stably clamped on the pre-assembly device 3.

As shown in fig. 5, as an embodiment, the positioning plate 31 is provided with a limiting portion 32, the limiting portion 32 is located on one side of the mounting hole 311, the limiting portion 32 and the mounting hole 311 are arranged in a group, and the limiting portion 32 is used for limiting the wiring harness 2.

As shown in fig. 5, as an embodiment, the stopper portion 32 is provided with a stopper groove 321, and the stopper groove 321 is used for clamping the wire harness 2.

As shown in fig. 5, according to one embodiment, the number of the limiting portions 32 and the number of the mounting holes 311 are both plural, and the plural mounting holes 311 and the plural limiting portions 32 are sequentially arranged, so that the pre-assembly device 3 can pre-assemble the plural battery module sampling terminals 1 (generally, the bus bars 4 on one battery module need to be welded to the plural battery module sampling terminals 1 correspondingly), thereby improving the welding efficiency.

As shown in fig. 5 and 6, as an embodiment, the positioning plate 31 is provided with the stopper portion 35, and the stopper portion 35 is provided on the lower surface of the positioning plate 31. The stopping part 35 is used for stopping and limiting the bus bar 4, so that the battery module sampling terminal 1 and the bus bar 4 are positioned during welding.

As shown in fig. 5, as an embodiment, the positioning plate 31 is provided with a number 34 to facilitate position recognition of the battery module sampling terminal 1 during installation, so as to prevent installation position errors.

As shown in fig. 5 and 6, as an embodiment, the specific installation welding process may be:

1. inserting the wiring harness 2 into the connecting piece 122 at the tail part of the battery module sampling terminal 1, and extruding the connecting piece 122 by using equipment to realize the fixed connection and the electric connection of the connecting piece 122 and the wiring harness 2, wherein the first bulge 1223 penetrates through the insulating skin 21 on the outer surface of the wiring harness 2 and then is connected with the conductor 22 in the wiring harness 2, and the second bulge 1224 pierces the insulating skin 21 on the outer surface of the wiring harness 2 and then is connected with the insulating skin 21;

2. installing the battery module sampling terminal 1 with the wire harness 2 in a compression joint on the pre-installation device 3, wherein the positioning part 13 is abutted against the positioning plate 31, and meanwhile, the battery module sampling terminal 1 is stably clamped on the pre-installation device 3 by combining the clamping action of the clamping part 33; meanwhile, the wiring harness 2 is limited in the limiting part 32, so that the wiring harness 2 is convenient to arrange and connect to a sampling device;

3. the preassembling device 3 preassembling the battery module sampling terminal 1 is attached to and aligned with the bus bar 4, the bus bar 4 is located below the preassembling device 3 and abuts against the stop portion 35, and the battery module sampling terminal 1 and the bus bar 4 are accurately attached together under the positioning action of the preassembling device 3; battery module sampling terminal 1 and busbar 4 adopt the same aluminium material, through laser welding's mode, realize the melting of two subassembly materials and connect to realize battery module sampling terminal 1 and busbar 4's stable connection (pre-installation device 3 can be demolishd after the welding is accomplished, also can remain in the original place), then utilize sampling device to sample can.

The embodiment of the utility model provides a battery module sampling terminal 1, welding part 11 are the thin slice flat structure, make to form great fusion connection area between battery module sampling terminal 1 and busbar 4, and intensity is high, and anti-stripping performance is good, can satisfy the tensile test requirement; meanwhile, by arranging the wire harness connecting part 12, the wire harness connecting part 12 can be stably connected with the wire harness 2, so that the stable connection between the wire harness 2 and the battery module sampling terminal 1 is realized, and the wire disconnection risk is reduced; through setting up location portion 13 to combine the pre-installation locate function of pre-installation device 3, can realize the location of battery module sampling terminal 1 when the welding, thereby improve the welding precision between battery module sampling terminal 1 and busbar 4, and make things convenient for welding operation, improved welding efficiency. And simultaneously, the embodiment of the utility model provides a pre-installation device 3 not only can improve the welding precision between battery module sampling terminal 1 and the busbar 4, can also improve welding position's uniformity to can arrange the position of pencil 2 in order, make a plurality of battery module sampling terminal 1 on the battery arrange neatly, guaranteed the accuracy and the stability of sampling. Moreover, the preassembly device 3 is small in overall height and convenient to use in a narrow space.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (14)

1. The battery module sampling terminal is characterized in that the battery module sampling terminal (1) comprises a welding part (11), a wire harness connecting part (12) and a positioning part (13), wherein the wire harness connecting part (12) and the positioning part (13) are both connected with the welding part (11), and the welding part (11) is used for being connected with a battery module; the wire harness connecting part (12) is used for being connected with a wire harness (2), and the positioning part (13) is used for positioning the battery module sampling terminal (1) during welding.

2. The battery module sampling terminal according to claim 1, wherein the wire harness connection part (12) includes a base body (121) connected to the welding part (11) and a connection member (122) connected to the base body (121), the connection member (122) being used to connect the wire harness (2).

3. The battery module sampling terminal according to claim 2, wherein the base (121) is formed by extending and protruding one side of the welding part (11), and the width of the base (121) is not greater than the width of the welding part (11).

4. The battery module sampling terminal according to claim 2, wherein the connection member (122) is provided with a through-groove (1220) into which the wire harness (2) is inserted for connecting the wire harness (2).

5. The battery module sampling terminal according to claim 4, wherein the wire harness (2) comprises a conductor (22) and an insulating skin (21) covering the conductor (22), the inner surface of the through groove (1220) is provided with a first protruding part (1223), and the first protruding part (1223) is used for being connected with the conductor (22) after passing through the insulating skin (21).

6. The battery module sampling terminal according to claim 5, wherein the inner surface of the through groove (1220) is further provided with a second projection (1224), and the second projection (1224) is used for penetrating into the insulation skin (21) and connecting with the insulation skin (21); the second projection (1224) penetrates the wire harness (2) to a depth smaller than that of the first projection (1223).

7. The battery module sampling terminal according to claim 6, wherein the connection member (122) includes a first connection portion (1221) and a second connection portion (1222) that are provided in segments; the first protruding portion (1223) is provided on the first connecting portion (1221); and/or the second projection (1224) is provided on the second connecting portion (1222).

8. The battery module sampling terminal of claim 6, wherein the first boss (1223) and/or the second boss (1224) comprise a tapered structure.

9. The battery module sampling terminal according to claim 1, wherein the wire harness connection part (12) and the positioning part (13) are respectively provided on opposite sides of the welded part (11).

10. The battery module sampling terminal according to claim 1, wherein the positioning portion (13) is a tongue plate structure formed to extend from one side of the welding portion (11).

11. The battery module sampling terminal according to any one of claims 1 to 10, wherein the welding part (11), the wire harness connection part (12), and the positioning part (13) are integrally formed.

12. A pre-assembly device for pre-assembling the battery module sampling terminal (1) according to any one of claims 1 to 11; the preassembly device (3) comprises a positioning plate (31), and a mounting hole (311) is formed in the positioning plate (31); when the battery module sampling terminal (1) is preassembled on the preassembling device (3), the welding part (11) is positioned in the mounting hole (311), and the positioning part (13) is abutted against the positioning plate (31).

13. The pre-assembly device according to claim 12, characterized in that the positioning plate (31) is provided with a limiting portion (32), and the limiting portion (32) is used for limiting the wiring harness (2).

14. The pre-assembly device according to claim 12, wherein the positioning plate (31) is provided with a clamping portion (33), and the clamping portion (33) is used for clamping the battery module sampling terminal (1).

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