CN219801218U - Pole connecting device and battery module - Google Patents

Abstract

The utility model relates to a pole connecting device and a battery module, wherein the pole connecting device comprises a conductor, an insulating sleeve, a wire and a locking piece, wherein the conductor is arranged in the sleeve, one end of the wire is connected with the conductor, the other end of the wire extends out of the sleeve, the conductor comprises a body and a meshing part, at least two meshing parts are arranged on one side of the body, which faces the pole, the meshing parts are spaced along the periphery of the body, all the meshing parts are surrounded to form a mounting groove, the pole is inserted into the mounting groove, the locking piece is connected with the meshing parts, and the meshing parts are driven to clasp or loosen the pole under the action of external force. The pole connecting device is simple in structure, convenient to assemble and disassemble and high in operation efficiency.

Description

Post connection device and battery module

Technical field

The utility model relates to the field of battery technology, and in particular to a pole connection device and a battery module.

Background technique

With the development of electronic technology, battery modules are widely used. Generally, a battery module is composed of multiple single cells. The multiple single cells are preset in position through tooling and then connected by welding current collectors. In order to ensure product quality, operators use peripheral testing equipment to connect current collectors to test single cells or battery modules. The existing technology has the following technical shortcomings: the connection method of the welding current collector requires the use of additional welding equipment or welding tooling, the production cost is high, the welding process is complex, the production efficiency and production stability are low, and the battery module is in individual units. The battery needs to be replaced after damage, which is inconvenient to disassemble and has a low reuse rate.

Utility model content

One purpose of the embodiments of the present invention is to provide a pole connection device with a simple structure and easy disassembly.

Another object of embodiments of the present invention is to provide a battery module with a simple structure and good safety and practicality.

To achieve this goal, embodiments of the present utility model adopt the following technical solutions:

In a first aspect, a pole connection device is provided, which includes a conductor, an insulating sleeve, a conductor and a locking piece. The conductor is arranged in the sleeve, and one end of the conductor is connected to the conductor. The other end of the wire extends outside the sleeve. The conductor includes a body and a bite portion. At least two bite portions are provided on the side of the body facing the pole of the battery. All of the bite portions are parts are spaced along the outer periphery of the body, and all the bite parts are enclosed to form an installation groove, the pole is inserted into the installation groove, and the locking piece is connected to the bite part to drive the bite part. Tighten or loosen the pole.

As a preferred solution of the pole connection device, the locking member includes an extrusion part, the extrusion part is provided on a side of the bite part close to the sleeve, and the extrusion part is provided with a first inclination surface, the first inclined surface slopes outward from an end far away from the battery toward an end close to the battery and away from the central axis of the installation groove, and the sleeve is movably connected to the conductor and can move along the first When moving in one direction, the sleeve contacts the first inclined surface, and the sleeve can push the pressing part to squeeze the bite part and hug the pole tightly.

As a preferred solution for a pole connection device, the sleeve is threadedly connected to the conductor, the inner wall of the sleeve is provided with a first thread structure, and the outer wall of the body is provided with a second thread structure, The first thread structure is threadedly matched with the second thread structure.

As a preferred solution of the pole connection device, the sleeve is slidingly connected to the conductor, and the outer wall of the sleeve is provided with a first hole;

The first hole is a threaded hole, and a bolt passes through the first hole and contacts the conductor; or,

The first hole is a through hole, and the outer wall of the conductor is provided with a plurality of second holes at intervals along the first direction. The second holes are threaded holes, and bolts are screwed through the first holes to the desired position. Describe the second hole.

As a preferred solution of the pole connection device, the locking member includes a screw, and at least two third holes are provided on the outer wall of the sleeve, and the third holes correspond to the bite portion one by one, and the The third hole is a threaded hole, and the screw passes through the third hole to squeeze the engaging portion and hold the pole tightly.

As a preferred solution of the pole connection device, the sleeve is provided with a second inclined surface, and the second inclined surface extends from an end close to the battery to an end far away from the battery and toward the center of the sleeve. The axial direction is inclined inward, and one end of the second inclined surface close to the battery is in contact with the first inclined surface.

As a preferred solution of the pole connection device, a receiving cavity is provided in the sleeve, and a sealing plate is provided at one end of the sleeve close to the body to block the receiving cavity, and a third sealing plate is provided on the sealing plate. Four holes, the fourth hole is in communication with the accommodation cavity, and the wire part extends through the fourth hole to the outside of the sleeve.

In a second aspect, a battery module is provided, including a plurality of batteries and the above-mentioned pole connection device. The poles of the battery are inserted into the installation slots of the pole connection device. The plurality of batteries pass through the pole connection device. The wires of the pole connection device are connected in series or in parallel.

As a preferred solution of a battery module, the battery includes a case and a pole, the pole includes a conductive part and a connecting part, at least part of the conductive part is protrudingly provided on the case, and the connection part The connecting part is connected to the conductive part, and the connecting part is spaced apart from the housing to form a clamping space. The inner wall of the engaging part of the conductor of the pole connection device is protruding toward the central axis of the installation groove. There is a clamping part, and the clamping part is clamped in the clamping space.

As a preferred solution of the battery module, a stopper protrudes from the outer periphery of the conductive part toward a side away from its central axis, and the stopper can limit the rotation of the latch part.

The beneficial effects of the embodiments of the present invention are: by arranging the conductor in the sleeve and then connecting it to the outside through the wire, the exposure of the conductor is reduced, the safety of the connection device is improved, and the wire has good flexibility, high degree of freedom, and convenient connection. ; By driving the locking piece with an external force, the bite portion can tighten or loosen the pole. The connecting device has a simple structure, is convenient to disassemble and assemble, has high operating efficiency, and can reduce the investment in welding equipment and welding tooling, thus saving production costs; by using The tight connection method is compatible with pole connections of different sizes, improving the versatility of the connection device; this connection device can be used to quickly replace individual cells in the battery module after damage, and has high maintainability. Effectively improve the reuse rate of battery modules.

Description of the drawings

The utility model will be further described in detail below based on the drawings and embodiments.

Figure 1 is a schematic diagram of the cooperation between the pole connection device and the battery according to the embodiment of the present invention.

Figure 2 is a schematic structural diagram of a pole connection device according to an embodiment of the present invention.

Figure 3 is a schematic structural diagram of a conductor according to an embodiment of the present invention.

Figure 4 is a schematic structural diagram of a battery according to an embodiment of the present invention.

In the picture:

1. Electrical conductor; 11. Body; 111. Second thread structure; 12. Bite part; 13. Extrusion part; 131. First inclined surface; 14. Snap part; 2. Wire; 3. Sleeve; 31 , first thread structure; 32. second inclined surface; 33. accommodation cavity; 34. sealing plate; 341. fourth hole; 4. installation slot; 5. battery; 51. pole; 511. conductive part; 512. Connecting part; 513. Stopping part; 52. Housing; 6. Snapping space.

Detailed ways

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only Some embodiments of the present invention are not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, unless otherwise explicitly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a detachable connection. Integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly stipulated and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features being in direct contact with each other. Features are not in direct contact but through other features between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

As shown in Figures 1, 2 and 3, the pole connection device of the embodiment of the present invention includes a conductor 1, an insulated sleeve 3, a wire 2 and a locking piece. The conductor 1 is used to connect to the pole of the battery 5. 51 is electrically connected, the sleeve 3 is provided with an accommodating cavity 33, the conductor 1 is arranged in the accommodating cavity 33, the conductor 1 includes a body 11 and a bite portion 12, and one end of the sleeve 3 close to the body 11 is provided with a seal to block the accommodating cavity 33. The sealing plate 34 has a fourth hole 341 on the sealing plate 34. The fourth hole 341 communicates with the accommodation cavity 33. The conductor 2 partially passes through the fourth hole 341 and extends outside the sleeve 3. The conductor 1 is arranged in the sleeve 3. One end of the conductor 2 is connected to the conductor 1, and the other end of the conductor 2 extends outside the sleeve 3. The body 11 is provided with at least two engaging portions 12 on the side facing the pole 51, and all the engaging portions 12 are along the outer circumference of the body 11. Spacing, all the bite parts 12 enclose to form the installation slot 4, the pole 51 is inserted into the installation slot 4, and the locking piece is connected with the bite parts 12 to drive the bite parts 12 to tighten or loosen the pole 51.

It can be understood that, as shown in FIGS. 1 , 2 and 3 , the engaging portions 12 may be provided with 2, 3, 4 or more. In this embodiment, four engaging portions 12 are evenly spaced in an annular shape. Take the cloth placed on the body 11 as an example. During installation, the connecting device is placed outside the pole 51, that is, the pole 51 is inserted into the installation groove 4 formed by the three bite parts 12, and conducts electricity along the direction under the action of external force. The locking piece is driven in the radial direction of the body 1 to bend the engaging portion 12 toward the central axis of the conductor 1 until the engaging portion 12 contacts the pole 51 to connect the connecting device to the pole 51; during disassembly, under the action of external force The locking member is driven in the radial direction of the conductor 1 to move away from the central axis of the conductor 1, and the bite portion 12 rebounds to the original state under its own restoring force, so that the bite portion 12 is separated from the pole 51, thereby causing the pole to 51 is detached from the connecting device. By arranging the conductor 1 in the sleeve 3 and then connecting it to the outside through the wire 2, the exposure of the conductor 1 is reduced, and the phenomenon of electric shock to workers or short circuit caused by accidental contact of the conductor 1 is reduced, and the safety of the connection device is improved, and the wire 2. Good flexibility, high degree of freedom, and convenient connection; the locking part is driven by external force to make the bite part 12 tighten or loosen the pole 51. The connection device has a simple structure, is convenient to disassemble and assemble, has high operating efficiency, and can reduce the need for welding equipment and investment in welding tooling, thereby saving production costs; the tight connection method can be compatible with pole posts 51 connections of different sizes, improving the versatility of the connection device; using this connection device to prevent damage to individual cells 5 in the battery 5 module It can be quickly replaced in a targeted manner, with high maintainability, effectively improving the reuse rate of the battery 5 module.

In one embodiment, as shown in Figures 2 and 3, the locking member includes an extrusion portion 13, which is provided on a side of the bite portion 12 close to the sleeve 3, and the extrusion portion 13 is provided with a first inclined surface 131. , the first inclined surface 131 tilts outward from the end far away from the battery 5 to the end close to the battery 5 and away from the central axis of the installation slot 4. The sleeve 3 is movably connected to the conductor 1 and moves along the first direction (the first direction is The X direction in Figure 2 is consistent with the direction of the central axis of the sleeve 3 itself), the sleeve 3 contacts the first inclined surface 131, and the sleeve 3 can push the extrusion part 13 to squeeze the bite part 12 to hug the pole 51 tightly. During installation, the external force drives the sleeve 3 to move in the Under the push of the sleeve 3, the engaging parts 12 are driven to shrink in the direction of approaching each other, giving the engaging parts 12 enough contact force to clamp the pole 51, so that the connecting device and the pole 51 are connected stably. During disassembly, the external force drives the sleeve 3 to move in the They open in directions away from each other until they return to their original state, that is, the bite portion 12 and the pole 51 are separated, making disassembly and maintenance quick and easy, saving time and effort.

In this embodiment, as shown in Figure 2, the sleeve 3 is threadedly connected to the conductor 1. The inner wall of the sleeve 3 is provided with a first thread structure 31, and the outer wall of the body 11 is provided with a second thread structure 111. A threaded structure 31 is threadedly matched with the second threaded structure 111 . Rotating the sleeve 3 relative to the conductor 1 can move the sleeve 3 along the X direction, so that the sleeve 3 pushes the extrusion part 13 along the first inclined surface 131 and drives the bite part 12 to tighten or loosen the pole 51. It is convenient to drive, and the use of threaded structure for connection is also conducive to fixing the relative state of the sleeve 3 and the conductor 1 at any time, and the connection is stable.

Optionally, the sleeve 3 is slidingly connected to the conductor 1. The outer wall of the sleeve 3 is provided with a first hole. The first hole is a threaded hole, and the bolt passes through the first hole and contacts the conductor 1. The sleeve 3 slides relative to the conductor 1 along its own axis and in a direction close to the battery 5 to push the extrusion part 13 along the first inclined surface 131, thus driving the bite part 12 to press against the pole 51, and maintain this pressing state while using bolts. Screw it through the first hole and contact the conductor 1 so that the sleeve 3 and the conductor 1 remain relatively fixed, so that the bite portion 12 always clamps the pole 51. When disassembly is required, loosen the bolt in the opposite direction. Yes, the structure is simple and the connection is convenient. In addition, the first hole can also be a through hole. The outer wall of the conductor 1 is provided with a plurality of second holes at intervals along the X direction. The second holes are threaded holes. The bolts pass through the first holes and are screwed to the second holes. The sleeve 3. Slide relative to the conductor 1 in the Screw one hole into the second hole to keep the sleeve 3 and the conductor 1 in a relatively fixed state, so that the bite portion 12 always clamps the pole 51. When it needs to be disassembled, just loosen the bolt in the reverse direction and use the bolt. The tight structural connection is convenient and stable.

Further, as shown in Figure 2, the sleeve 3 is provided with a second inclined surface 32. The second inclined surface 32 is inclined inward from an end close to the battery 5 to an end far away from the battery 5 and toward the central axis of the sleeve 3. One end of the second inclined surface 32 close to the battery 5 is in contact with the first inclined surface 131 . By providing the second inclined surface 32, the contact point between the sleeve 3 and the extrusion part 13 is located on the first inclined surface 131, thereby preventing the sleeve 3 from being stuck at the angle between the first inclined surface 131 and the bite part 12, ensuring that the sleeve 3 When the sleeve 3 and the conductor 1 slide and fit, the sleeve 3 and the first inclined surface 131 slide and fit smoothly.

In another embodiment, the locking member includes a screw, and the outer wall of the sleeve 3 is provided with at least two third holes. The third holes correspond to the bite portion 12 one-to-one. The third holes are threaded holes, and the screws pass through the third holes. Squeeze the engaging portion 12 to hug the pole 51 tightly. By extending the length of the screw through the third hole into the sleeve 3, the engaging portions 12 are pushed toward or away from each other toward the central axis of the conductor 1, thereby controlling the connection or separation between the conductor 1 and the pole post 51. The tight connection is convenient. In other embodiments, the locking member can also be a cylinder, an oil cylinder or other linear drive mechanism provided on the inner wall of the sleeve 3 , or a surrounding holding structure such as a clamp, which only needs to be able to drive the bite portion 12 toward the center of the conductor 1 The axis directions can be closer to or farther away from each other.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the utility model also provides a battery 5 module, including a plurality of batteries 5 and a pole connection device using any of the above embodiments. The pole 51 of the battery 5 Insert into the installation slot 4 of the pole connection device, a plurality of batteries 5 are connected in series or in parallel through the wires 2 of the pole connection device. By using the battery module assembled by the pole connection device, individual cells 5 can be replaced in a targeted manner after damage, which has high maintainability and improves the safety and practicality of the battery module. The battery 5 module has a high reuse rate and good economic benefits.

Optionally, as shown in Figure 4, the battery 5 includes a case 52 and a pole 51. The pole 51 includes a conductive part 511 and a connecting part 512. At least part of the conductive part 511 is protrudingly provided on the case 52, and the connecting part 512 It is connected to the conductive part 511, and the connecting part 512 is spaced apart from the housing 52 to form a clamping space 6. The inner wall of the bite part 12 of the conductor 1 of the pole connection device is provided with a clamping part protruding toward the central axis direction of the installation groove 4. 14. The clamping part 14 is clamped in the clamping space 6 . The engaging portion 12 is driven by an external force to hug the outer periphery of the conductive portion 511 to limit the radial position of the pole connection device and the pole 51; the engaging portion 12 is engaged with the engaging space 6 through the engaging portion 14 to limit the pole. The axial position of the connecting device and the pole 51 improves the connection strength between the pole connecting device and the pole 51 .

Preferably, as shown in FIG. 4 , a stopper 513 protrudes from the outer periphery of the conductive part 511 toward the side away from its central axis. The stopper 513 can limit the rotation of the engaging part 14 , that is, the stopper 513 is engaged with the engaging part 14 . The space between two adjacent bite parts 12 is used to define the relative position of the conductor 1 and the pole 51, so that when the sleeve 3 rotates relative to the conductor 1, the phenomenon of synchronous rotation of the conductor 1 is reduced, and the connection between the poles is improved. The connection stability of the device.

In the description of this article, it should be understood that the terms "upper", "lower" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplified operation, rather than instructions or implications. The device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of this specification, reference to the term "an embodiment" or the like means that a specific feature, structure, material or characteristic of the embodiment is included in at least one embodiment or example of the invention. In this specification, schematic expressions of the above terms do not necessarily refer to the same embodiment.

In addition, it should be understood that although this specification is described in terms of implementations, not each implementation only contains an independent technical solution. This description of the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole. , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

The technical principles of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention and cannot be construed as limiting the scope of the present invention in any way. Based on the explanations here, those skilled in the art can think of other specific embodiments of the present invention without any creative effort, and these methods will all fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a utmost point post connecting device, its characterized in that includes electric conductor, wire, locking piece and insulating sleeve, the electric conductor set up in the sleeve, the one end of wire with the electric conductor is connected, the other end of wire extends to outside the sleeve, the electric conductor includes body and interlock portion, the body is provided with two at least interlock portion towards one side of the utmost point post of battery, all interlock portion is followed the periphery interval of body, all interlock portion encloses and closes and form the mounting groove, the utmost point post is inserted and is located in the mounting groove, the locking piece with interlock portion is connected, so as to drive interlock portion is embraced tightly or is released the utmost point post.

2. The pole connection device according to claim 1, wherein the locking member includes a pressing portion provided on a side surface of the engaging portion near the sleeve, the pressing portion being provided with a first inclined surface inclined outwardly from an end away from the battery toward an end near the battery and away from a central axis direction of the mounting groove, the sleeve being movably connected with the conductor and movable in a first direction, the sleeve abutting against the first inclined surface, the sleeve being capable of pushing the pressing portion to press the engaging portion to hold the pole.

3. The pole connection device of claim 2, wherein the sleeve is threadedly connected to the electrical conductor, a first thread structure is provided on an inner sidewall of the sleeve, a second thread structure is provided on an outer sidewall of the body, and the first thread structure is threadedly engaged with the second thread structure.

4. The pole connection device of claim 2, wherein the sleeve is slidably connected to the electrical conductor, the outer side wall of the sleeve being provided with a first hole;

the first hole is a threaded hole, and the bolt passes through the first hole to be abutted with the conductor; or alternatively, the first and second heat exchangers may be,

the first holes are through holes, a plurality of second holes are formed in the outer side wall of the electric conductor at intervals along the first direction, the second holes are threaded holes, and bolts penetrate through the first holes and are screwed into the second holes.

5. The pole connection device according to claim 1, wherein the locking member comprises a screw, at least two third holes are formed in the outer side wall of the sleeve, the third holes are in one-to-one correspondence with the engagement portions, the third holes are threaded holes, and the screw passes through the third holes to press the engagement portions to hug the pole.

6. The pole connection device according to any one of claims 2 to 4, wherein the sleeve is provided with a second inclined surface that is inclined inward from an end near the battery toward an end away from the battery and toward a central axis direction of the sleeve, and an end near the battery abuts against the first inclined surface.

7. The pole connection device according to any one of claims 1 to 5, wherein a receiving cavity is provided in the sleeve, a sealing plate for sealing off the receiving cavity is provided at an end of the sleeve adjacent to the body, a fourth hole is provided in the sealing plate, the fourth hole communicates with the receiving cavity, and the wire portion extends out of the sleeve through the fourth hole.

8. A battery module comprising a plurality of batteries and the pole connection device according to any one of claims 1 to 7, wherein poles of the batteries are inserted into the mounting grooves of the pole connection device, and a plurality of the batteries are connected in series or in parallel through leads of the pole connection device.

9. The battery module according to claim 8, wherein the battery comprises a housing and a pole, the pole comprises a conductive part and a connecting part, at least part of the conductive part is convexly arranged on the housing, the connecting part is connected with the conductive part, the connecting part and the housing are separated to form a clamping space, the inner side wall of the engagement part of the conductive body of the pole connecting device is convexly provided with a clamping part towards the central axis direction of the mounting groove, and the clamping part is clamped in the clamping space.

10. The battery module according to claim 9, wherein the outer periphery of the conductive portion is provided with a stopper portion protruding toward a side away from the center axis thereof, the stopper portion being capable of restricting the rotation of the engaging portion.