CN214280143U

CN214280143U - Connecting sheet for power battery and signal acquisition wire harness

Info

Publication number: CN214280143U
Application number: CN202120657243.8U
Authority: CN
Inventors: 王亮亮; 刘磊; 杨文�; 任万龙; 覃峰; 张鹏
Original assignee: Akm Electronics Technology Suzhou Co ltd
Current assignee: Akm Electronics Technology Suzhou Co ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-09-24
Anticipated expiration: 2031-03-31

Abstract

The utility model provides a connection piece and signal acquisition pencil for power battery, its is rational in infrastructure, can effectively improve the welding quality of connection piece and flexible circuit board, after the signal acquisition pencil adopted this connection piece, can effectively reduce the bubble rate of insulating protective layer, ensure the attached effect and the insulating effect of insulating protective layer, the one end of connection piece is equipped with the weld part, one side of weld part is equipped with the welding cladding material on the surface, be equipped with NTC on the weld part and dodge portion, its characterized in that: the NTC dodges and is equipped with breach portion in the portion, breach portion makes NTC dodges the portion with the outside of connection piece is linked together, the edge that NTC dodged the portion is equipped with NTC protection boss.

Description

Connecting sheet for power battery and signal acquisition wire harness

Technical Field

The utility model relates to a power battery technical field, concretely relates to connection piece and signal acquisition pencil for power battery.

Background

Along with the gradual scarcity of global fuel resources and the aggravation of environmental pollution, the awareness of people on environmental protection is enhanced, and the call for protecting the environment and saving resources is increased day by day. All countries around the world are developing new energy vehicles to replace traditional internal combustion engine automobiles. The electric automobile has no pollution, the energy can be configured in a diversified way, the noise is low, the energy conversion efficiency is higher than that of an internal combustion engine automobile, meanwhile, the electric automobile has the advantages of simple structure, low operating cost, relatively good safety and the like, represents the development direction of a new generation of environment-coordinated transportation means, and is becoming a new trend of automobile development in the world at present. However, the most significant current development of electric vehicles is due to their energy storage devices, batteries. In the application process of the electric vehicle, in order to obtain high power and high capacity, the battery module is formed by the single battery cores in a series-parallel connection mode.

In order to ensure that the battery module can normally work, the vehicle management system is required to monitor the battery module in real time, the voltage signals of all the single battery cores are required to be acquired in real time, and the performance of each battery core is evaluated. A battery signal acquisition harness is a device designed to acquire signals such as voltage, current, and temperature of a battery.

The chinese utility model patent publication No. CN111295047A discloses a signal acquisition harness for a power battery of a vehicle, which comprises an NTC connecting sheet, wherein the NTC connecting sheet comprises a nickel sheet, a windowing region and a bonding pad are arranged on the nickel sheet, and an NTC device is arranged in the windowing region and contacts with a flexible circuit board;

however, in practical use, it is found that when the NTC connecting sheet and the flexible circuit board are welded, due to the existence of the windowing region, bubbles generated by vaporization of the flux during the welding process are difficult to remove, and the welding quality of the connecting sheet and the flexible circuit board is affected; in addition, after the NTC connecting sheet is connected with the flexible circuit board, air bubbles are easily generated when the insulating protective layer is applied, and the insulating effect of the insulating protective layer is affected.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model provides a connection piece and signal acquisition pencil for power battery, its is rational in infrastructure, can effectively improve the welding quality of connection piece and flexible circuit board, and after the signal acquisition pencil adopted this connection piece, can effectively reduce insulating protective layer's bubble rate, ensured insulating protective layer's attached effect and insulating effect.

The technical scheme is as follows: the utility model provides a connection piece for power battery, the one end of connection piece is equipped with the weld part, one side of weld part is equipped with the welding cladding material on the surface, be equipped with the NTC on the weld part and dodge portion, its characterized in that: the NTC dodges and is equipped with breach portion in the portion, breach portion makes NTC dodges the portion with the outside of connection piece is linked together, the edge that NTC dodged the portion is equipped with NTC protection boss.

Further, the height of the NTC protection boss is higher than that of an NTC sensor arranged in the NTC avoiding part.

Furthermore, the protection boss is including setting up the turn-ups of the edge of NTC dodge portion, still be equipped with the orientation on the turn-ups and be located the portion of bending that the NTC sensor of NTC dodge portion is buckled.

Furthermore, an air bubble separation area is reserved between the flanging and the side edge of the NTC avoidance part.

Further, the notch is arranged at the top or two sides of the connecting piece.

Further, the surface of the welding coating is provided with surface textures.

Furthermore, the welding part is also provided with air holes.

The utility model provides a signal acquisition pencil for power battery, includes flexible circuit board, its characterized in that: the connecting sheet is arranged on the flexible circuit board, the NTC sensor is arranged on the flexible circuit board and is located in the NTC avoiding part of the connecting sheet, and the upper surface and the lower surface of the connecting part of the connecting sheet and the flexible circuit board are respectively provided with an insulating protective layer.

Further, the insulating protection layer is formed by dispensing.

Furthermore, the insulation protection layer is a PI film which is pressed on the connection position of the connecting sheet and the flexible circuit board.

The utility model discloses a connection piece for power battery, the signal acquisition pencil that is particularly useful for having NTC sensor, the connection piece is windowed on the connection piece, set up the NTC and dodge the basis of portion, set up breach portion on NTC dodges the portion, breach portion makes NTC dodge the portion no longer a confined region, the inside of NTC dodge the portion directly is linked together with the outside of connection piece, when welding in the original design, the rosin gasification as the scaling powder easily produces the bubble, after adopting such design, the bubble is convenient to be discharged from breach portion, thereby can reduce welded bubble rate, improve the welding quality of connection piece and flexible circuit board; meanwhile, in the original design, when the insulating protective layer is applied at last, because the NTC avoiding part is a closed area, the air bubbles are generated universally and easily, the insulating effect and the attaching effect of the insulating protective layer are influenced, but when the signal acquisition line beam for the power battery is adopted and the PI film is attached to form the insulating protective layer, the gap can be used for discharging the air bubbles generated in the PI film pressing cover, and the attaching effect of the insulating protective layer is improved;

furthermore, the utility model discloses in still be equipped with NTC protection boss in the edge that the NTC dodged the portion, NTC protection boss highly is higher than the NTC device, can play the protection NTC sensor and avoid receiving external force and bump and take place to damage to in gluing the technology that forms insulating protective layer, can also the point of effectual control point glue technology glue the volume, make insulating glue concentrate in the NTC that the point was glued dodges in, in addition, the utility model discloses in set up the portion of bending that the orientation is located the NTC sensor that the NTC dodges and buckles in the NTC dodges the portion on the protection boss, thereby in the technology of pressing the PI membrane, can avoid on the lamination equipment fragile gasbag part direct and NTC device and connection piece contact, the life of the last pressfitting part gasbag of extension lamination equipment.

Drawings

Fig. 1 is a schematic front view of a connecting sheet of a power battery according to a first embodiment of the present invention;

fig. 2 is a schematic side view of a connecting sheet of a power battery according to a first embodiment of the present invention;

fig. 3 is a schematic front view of a connecting sheet of a power battery according to a second embodiment of the present invention;

fig. 4 is a schematic front view of a connecting sheet of a power battery according to a third embodiment of the present invention;

fig. 5 is a schematic front view of a connection sheet of a power battery according to a fourth embodiment of the present invention;

fig. 6 is a schematic diagram of the signal collecting harness connection bus bar of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, it should be noted that the drawings provided in the present embodiment illustrate only the basic idea of the present invention in a schematic manner, and only the components related to the present invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of each component may be changed at will in actual implementation, and the component layout form may be more complicated.

See fig. 1, 2, the utility model discloses a connection piece 1 for power battery, connection piece 1's material adopts the nickel piece, connection piece 1's one end is equipped with weld part 101, one side of weld part 101 is equipped with the welding cladding material 102 on the surface, is equipped with NTC on weld part 101 and dodges a 103, and NTC dodges and is equipped with breach portion 104 on the portion 103, and breach portion 104 makes NTC dodge a 103 and is linked together with connection piece 1's the outside, and NTC dodges the edge of a 103 and is equipped with NTC protection boss 105.

Specifically, the height of the NTC protection boss 105 is higher than that of the NTC sensor 2 arranged in the NTC avoiding part, for example, in a typical case, the typical thickness of one connecting piece is 0.3mm, and the height of the NTC sensor 2 is 0.9mm, in a conventional design, the NTC sensor 2 protrudes out of the connecting piece 1, and after the height of the NTC protection boss is set to be greater than 1mm, the NTC sensor can be well protected.

In this embodiment, the protection boss 105 includes the turn-ups 106 that sets up in the edge of the NTC dodge portion, still is equipped with the portion of bending 107 that the NTC sensor that is located the NTC dodge portion is buckled towards on the turn-ups 106, and the structure of protection boss 105 in this embodiment can directly be punched and formed, and convenient processing, the dot gum volume of technology can also be glued to effectual control point to the NTC protection boss for insulating glue concentrates on in the NTC dodge portion of gluing.

In addition, an air bubble spacer 108 is left between the turned edge 106 and the side edge of the NTC avoiding portion 104, and the arrangement of the air bubble spacer 108 can effectively avoid air bubble residue.

As shown in fig. 1, in the present embodiment, the NTC avoiding portion 103 is configured to have an approximately rectangular shape, and the notch portion 104 is located at the left side, and the notch portion 104 occupies the size of one side of the rectangular shape, while in other embodiments of the present invention, the notch portion may be located at other positions, as shown in fig. 3, the notch portion 104 is located at the right side, and as shown in fig. 4, the notch portion 104 is located at the top of the connecting piece.

In an embodiment of the present invention, the surface of the welding plating layer is provided with surface textures, which may be various forms of textures, including regular or irregular, and which are intended to increase surface roughness and enhance reliability during welding.

As shown in fig. 5, in an embodiment of the present invention, on the basis of the embodiment shown in fig. 4, an air vent 109 is further disposed on the welding portion 101, and the air vent 109 helps to discharge gas generated by vaporization of the soldering flux during welding, so as to further improve the welding quality.

The embodiment of the utility model provides an in, still provide a signal acquisition pencil for power battery, including flexible circuit board 3, be equipped with connection piece 1 in the above-mentioned embodiment on the flexible circuit board, as shown in fig. 6, bus bar 4 is connected through connection piece 1 to flexible circuit board 1, is equipped with NTC sensor 2 on the flexible circuit board 3, and NTC sensor is located the NTC of connection piece and dodges the portion 103, is equipped with insulating protective layer 5 on the upper and lower surface of connection piece 1 and flexible circuit board junction respectively.

The utility model discloses a connection piece for power battery, the signal acquisition pencil that specially adapted has the NTC sensor, the connection piece is windowed on the connection piece, set up the NTC and dodge the basis of portion, set up breach portion in NTC dodges the portion, breach portion makes NTC dodge the portion no longer be a confined region, the inside of NTC dodge the portion is direct to be linked together with the outside of connection piece, when welding in the original design, the rosin gasification as the scaling powder produces the bubble easily, adopt such design back, the bubble is convenient to be discharged from breach portion, thereby can reduce welded bubble rate, improve the welding quality of connection piece and flexible circuit board.

In one embodiment of the present invention, the insulating protective layer is formed by dispensing.

In another embodiment of the present invention, the insulation protection layer is a PI film pressed on the connection portion of the connection sheet and the flexible circuit board, and when the insulation protection layer is finally applied in the original design, since the NTC avoiding portion is a closed region, the NTC avoiding portion is generally easy to generate bubbles, which affects the insulation effect and the attachment effect of the insulation protection layer, but when the insulation protection layer is formed by the attachment PI film after the signal acquisition line beam for the power battery is adopted, the notch can be used for discharging the bubbles generated in the pressing of the PI film, so as to improve the attachment effect of the insulation protection layer;

in this embodiment, the bending portion bent towards the NTC sensor located in the NTC avoiding portion is disposed on the protection boss, so that in the process of pressing the PI film, a fragile airbag part on the pressing device can be prevented from directly contacting with the NTC device and the connecting sheet, and the service life of the airbag of the pressing part on the pressing device is prolonged.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a connection piece for power battery, the one end of connection piece is equipped with the weld part, one side of weld part is equipped with the welding cladding material on the surface, be equipped with the NTC on the weld part and dodge portion, its characterized in that: the NTC dodges and is equipped with breach portion in the portion, breach portion makes NTC dodges the portion with the outside of connection piece is linked together, the edge that NTC dodged the portion is equipped with NTC protection boss.

2. A tab for a power cell according to claim 1, wherein: the height of the NTC protection boss is higher than that of an NTC sensor arranged in the NTC avoiding part.

3. A tab for a power cell according to claim 1, wherein: the protection boss is including setting up the turn-ups of the edge of NTC dodge portion, still be equipped with the orientation on the turn-ups and be located the portion of bending that the NTC sensor in the NTC dodges portion is buckled.

4. A tab for a power cell according to claim 3, wherein: and an air bubble spacer area is reserved between the flanging and the side edge of the NTC avoiding part.

5. A tab for a power cell according to claim 1, wherein: the notch is arranged at the top or two sides of the connecting piece.

6. A tab for a power cell according to claim 1, wherein: the surface of the welding coating is provided with surface textures.

7. A tab for a power cell according to claim 1, wherein: and air holes are also formed in the welding part.

8. The utility model provides a signal acquisition pencil for power battery, includes flexible circuit board, its characterized in that: the connecting sheet of claim 1 is arranged on the flexible circuit board, the NTC sensor is located in an NTC avoiding part of the connecting sheet, and insulation protective layers are respectively arranged on the upper surface and the lower surface of the connecting part of the connecting sheet and the flexible circuit board.

9. The signal acquisition harness for a power battery as claimed in claim 8, wherein: the insulating protective layer is formed by dispensing.

10. The signal acquisition harness for a power battery as claimed in claim 8, wherein: the insulation protection layer is a PI film which is pressed on the connection position of the connecting sheet and the flexible circuit board.