Conductive connecting piece for power battery pack

Abstract

The utility model discloses a conductive connecting piece for a power battery pack, and relates to the technical field of power battery packs, the conductive connecting piece comprises a conductive mechanism connected with the power battery pack, the conductive mechanism comprises a conductive copper bar, and a fixing screw is inserted into the surface of the conductive copper bar; and the passive heat dissipation mechanism comprises an insulating heat conduction piece. Through the arrangement of the spring and the elastic metal plate in the conductive mechanism, the conductive copper bar can be pushed to be in close contact with the electrode when the fixing screw is loosened due to vibration, so that the problem of poor contact caused by vibration or deformation is reduced, the contact resistance is reduced, the energy transmission efficiency of the battery pack is improved, and the service life of the battery pack is prolonged. Meanwhile, due to the arrangement of the passive heat dissipation mechanism, heat generated in the conductive copper bar can be adsorbed through the passive heat dissipation mechanism, the natural heat dissipation area is increased, meanwhile, due to the arrangement of the active heat dissipation mechanism, the flowing speed of the air on the surface of the passive heat dissipation mechanism can be increased, and the heat dissipation efficiency of the passive heat dissipation mechanism is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery package technical field, concretely relates to a kind of electrically-conductive connecting pieces for power battery package. BACKGROUND

[0002] As the core component of electric vehicle and energy storage system, the electrically-conductive connection between the internal cells of power battery package is crucial. Currently commonly used electrically-conductive connecting pieces mainly include: bolted connecting pieces, which are fastened with copper bars or aluminum bars and cell poles by bolts, with low cost. Welded connecting pieces, which are connected by ultrasonic welding or laser welding process, have high connection strength. Elastic contact connecting pieces, which realize elastic contact by spring sheets or elastic pins, can compensate for cell swelling deformation.

[0003] Currently, traditional bolted connecting pieces are prone to looseness due to vibration, and the oxidation or contamination of the contact interface increases the resistance, affecting the energy transmission efficiency of the battery pack. At the same time, during high-current charging and discharging, the connecting piece generates a lot of heat, and improper heat dissipation design can cause local temperature to be too high, accelerating material aging and even causing safety hazards. Therefore, an electrically-conductive connecting piece for power battery package is proposed. SUMMARY

[0004] The utility model provides a kind of electrically-conductive connecting pieces for power battery package to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] An electrically-conductive connecting piece for power battery package includes an electrically-conductive mechanism that connects the power battery package. The electrically-conductive mechanism includes an electrically-conductive copper bar, and a fixing screw is inserted into the surface of the electrically-conductive copper bar. A passive heat dissipation mechanism includes an insulating heat-conducting piece, an insulating connecting screw is inserted into the inside of the insulating heat-conducting piece, and the lower end of the insulating connecting screw is threadedly connected to the inside of the electrically-conductive copper bar. An active heat dissipation mechanism includes a mounting frame, and a motor is fixedly connected to the inner wall of the mounting frame.

[0007] The further improvement of the utility model technical scheme is that the electrically-conductive mechanism further includes a first connecting sheet, and the first connecting sheet is sleeved on the surface of the fixing screw.

[0008] The further improvement of the utility model technical scheme is that the bottom of the first connecting sheet is fixedly connected with a spring, and the end of the spring away from the first connecting sheet is fixedly connected with a second connecting sheet.

[0009] The further improvement of the utility model technical scheme is that the second connecting sheet is sleeved on the surface of the fixing screw, and the bottom of the second connecting sheet is overlapped with an elastic metal plate.

[0010] A further improvement of this utility model is that the bottom of the elastic metal plate overlaps with the top of the conductive copper busbar, and a thermally conductive silicone grease layer is provided between the top of the elastic metal plate and the insulating thermally conductive component.

[0011] A further improvement of the present invention is that the passive heat dissipation mechanism further includes a connecting column, the bottom of which is fixedly connected to the top of the insulating heat-conducting component.

[0012] A further improvement of this utility model is that: a heat dissipation plate is provided on the surface of the connecting column, and the surface of the heat dissipation plate is bolted to the side of the mounting frame.

[0013] A further improvement of the present invention is that the active heat dissipation mechanism further includes a fan blade, one side of which is fixedly connected to one end of the motor shaft.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] This utility model provides a conductive connector for a power battery pack. By incorporating a spring and an elastic metal plate in the conductive mechanism, the conductive copper busbar can be pushed to maintain tight contact with the electrode when the fixing screw is loosened by vibration. This reduces contact problems caused by vibration or deformation, thereby lowering contact resistance and improving the energy transmission efficiency of the battery pack. Simultaneously, the passive heat dissipation mechanism can absorb the heat generated inside the conductive copper busbar, increasing the natural heat dissipation area. Furthermore, the active heat dissipation mechanism can accelerate the airflow speed on the surface of the passive heat dissipation mechanism, further improving its heat dissipation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is an exploded structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the heat dissipation mechanism of this utility model;

[0019] Figure 4 This is an exploded structural diagram of the conductive mechanism of this utility model.

[0020] In the diagram: 11. Conductive copper busbar; 12. Fixing screw; 13. First connecting piece; 14. Spring; 15. Second connecting piece; 16. Elastic metal plate; 21. Insulating and heat-conducting component; 22. Insulating connecting screw; 23. Connecting post; 24. Heat sink; 31. Mounting frame; 32. Motor; 33. Fan blade. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to embodiments:

[0022] Example 1

[0023] like Figures 1-4 As shown, this utility model provides a conductive connector for a power battery pack, including a conductive mechanism for connecting the power battery pack, the conductive mechanism including a conductive copper busbar 11, and a fixing screw 12 inserted into the surface of the conductive copper busbar 11; a passive heat dissipation mechanism, the passive heat dissipation mechanism including an insulating heat-conducting component 21, an insulating connecting screw 22 inserted into the interior of the insulating heat-conducting component 21, the lower end of the insulating connecting screw 22 being threadedly connected to the interior of the conductive copper busbar 11; and an active heat dissipation mechanism, the active heat dissipation mechanism including a mounting frame 31, and a motor 32 fixedly connected to the inner wall of the mounting frame 31.

[0024] In this embodiment, during use, the conductive copper busbar 11 is fixed to the electrode post surface of the power battery pack by the fixing screw 12. During the rotation of the fixing screw 12, the first connecting piece 13 moves down to compress the spring 14, and the second connecting piece 15 moves down to compress the elastic metal plate 16 under the action of the spring 14. When the fixing screw 12 becomes loose due to vibration, the elastic force of the spring 14 and the elastic metal plate 16 can press the conductive copper busbar 11 tightly to the electrode post surface of the power battery pack, so as to maintain the tightness of the connection and make it easier to use.

[0025] Example 2

[0026] like Figures 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, a conductive mechanism connecting the power battery pack includes a conductive copper busbar 11, with a fixing screw 12 inserted into the surface of the conductive copper busbar 11; a passive heat dissipation mechanism includes an insulating heat-conducting component 21, with an insulating connecting screw 22 inserted inside the insulating heat-conducting component 21, the lower end of the insulating connecting screw 22 being threadedly connected to the inside of the conductive copper busbar 11; and an active heat dissipation mechanism includes a mounting frame 31, with a fixed connection on the inner wall of the mounting frame 31. The motor 32 and the conductive mechanism also include a first connecting piece 13, which is sleeved on the surface of the fixing screw 12. A spring 14 is fixedly connected to the bottom of the first connecting piece 13. A second connecting piece 15 is fixedly connected to the end of the spring 14 away from the first connecting piece 13. The second connecting piece 15 is sleeved on the surface of the fixing screw 12. An elastic metal plate 16 overlaps the bottom of the second connecting piece 15. The bottom of the elastic metal plate 16 overlaps with the top of the conductive copper busbar 11. A thermally conductive silicone grease layer is provided between the top of the elastic metal plate 16 and the insulating thermally conductive component 21.

[0027] In this embodiment, when the conductive copper busbar 11 generates heat due to the current passing through it, the heat is conducted to the insulating heat-conducting component 21 through thermal grease. Subsequently, under the action of the connecting post 23, the heat is guided to the heat sink 24, increasing the natural heat dissipation area. When the current is too large and the natural state cannot dissipate heat in time, the motor 32 can be started to drive the fan blade 33 to rotate, thereby accelerating the airflow speed on the surface of the passive heat dissipation mechanism and improving its heat dissipation effect.

[0028] Example 3

[0029] like Figures 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, a conductive mechanism for connecting the power battery pack includes a conductive copper busbar 11, with a fixing screw 12 inserted into the surface of the conductive copper busbar 11; a passive heat dissipation mechanism includes an insulating heat-conducting component 21, with an insulating connecting screw 22 inserted inside the insulating heat-conducting component 21, the lower end of the insulating connecting screw 22 being threadedly connected to the inside of the conductive copper busbar 11; an active heat dissipation mechanism includes a mounting frame 31, with a motor 32 fixedly connected to the inner wall of the mounting frame 31; the passive heat dissipation mechanism also includes a connecting column 23, the bottom of the connecting column 23 being fixedly connected to the top of the insulating heat-conducting component 21, a heat dissipation plate 24 being provided on the surface of the connecting column 23, the surface of the heat dissipation plate 24 being bolted to the side of the mounting frame 31; the active heat dissipation mechanism also includes a fan blade 33, one side of the fan blade 33 being fixedly connected to one end of the motor 32 shaft.

[0030] In this embodiment, when the current is too high and the heat cannot be dissipated in time under natural conditions, the motor 32 can be started to drive the fan blade 33 to rotate, thereby accelerating the airflow speed on the surface of the passive heat dissipation mechanism and improving its heat dissipation effect. When the fixing screw 12 becomes loose due to vibration, the spring 14 and the elastic metal plate 16 can be used to press the conductive copper busbar 11 tightly against the electrode post surface of the power battery pack to maintain a tight connection and make it easier to use.

[0031] The working principle of the conductive connector used in the power battery pack will be explained in detail below.

[0032] like Figures 1-4As shown, during use, the conductive copper busbar 11 is fixed to the electrode post surface of the power battery pack by fixing screw 12. During the rotation of fixing screw 12, the first connecting piece 13 moves down to compress the spring 14, and the second connecting piece 15 moves down to compress the elastic metal plate 16 under the force of the spring 14. Then, after applying thermally conductive silicone grease to the top of the conductive copper busbar 11, the insulating thermally conductive component 21 is fixed to the top of the conductive copper busbar 11 by insulating connecting screw 22. When current flows through the conductive copper busbar 11 and generates heat, the heat is conducted to the insulating component through the thermally conductive silicone grease. The heat is then guided into the heat sink 24 by the connecting post 23, increasing the natural heat dissipation area. When the current is too large and the natural state cannot dissipate heat in time, the motor 32 can be started to drive the fan 33 to rotate, which will speed up the airflow on the surface of the passive heat dissipation mechanism and make its heat dissipation effect better. When the fixing screw 12 is loosened due to vibration, the spring 14 and the elastic metal plate 16 can be used to press the conductive copper busbar 11 tightly to the electrode post surface of the power battery pack to maintain the tightness of the connection and make it easier to use.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An electrically conductive connection for a power battery pack, characterized by: The application relates to a power battery pack and a passive and active heat dissipation mechanism thereof. The conductive mechanism connected with the power battery pack comprises a conductive copper bar (11), and a fixing screw (12) is inserted into the surface of the conductive copper bar (11); The passive heat dissipation mechanism comprises an insulating heat conducting piece (21), an insulating connecting screw (22) is inserted into the inside of the insulating heat conducting piece (21), and the lower end of the insulating connecting screw (22) is screwed with the inside of the conductive copper bar (11). The active heat dissipation mechanism comprises a mounting frame (31), and a motor (32) is fixedly connected to the inner wall of the mounting frame (31).

2. The electrically conductive connector for a power battery pack of claim 1, wherein: The conductive mechanism further comprises a first connecting sheet (13) sleeved on the surface of the fixing screw (12).

3. The electrically conductive connector for a power battery pack of claim 2, wherein: The bottom of the first connecting sheet (13) is fixedly connected with a spring (14), and the end, away from the first connecting sheet (13), of the spring (14) is fixedly connected with a second connecting sheet (15).

4. The electrically conductive connector for a power battery pack of claim 3, wherein: The second connecting sheet (15) is sleeved on the surface of the fixing screw (12), and the bottom of the second connecting sheet (15) is overlapped with an elastic metal sheet (16).

5. The electrically conductive connector for a power battery pack of claim 4, wherein: The bottom of the elastic metal sheet (16) is overlapped with the top of the conductive copper bar (11), and a heat conducting silicone grease layer is arranged between the top of the elastic metal sheet (16) and the insulating heat conducting piece (21).

6. The electrically conductive connector for a power battery pack of claim 1, wherein: The passive heat dissipation mechanism further comprises a connecting column (23), and the bottom of the connecting column (23) is fixedly connected with the top of the insulating heat conducting piece (21).

7. The electrically conductive connector for a power battery pack of claim 6, wherein: The surface of the connecting column (23) is provided with a heat dissipation plate (24), and the surface of the heat dissipation plate (24) is bolted with the side surface of the mounting frame (31).

8. The electrically conductive connector for a power battery pack of claim 1, wherein: The active heat dissipation mechanism further comprises a fan blade (33), and one side of the fan blade (33) is fixedly connected with one end of the rotating shaft of the motor (32).

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