CN220306546U

CN220306546U - High-voltage power battery connection structure and power battery with same

Info

Publication number: CN220306546U
Application number: CN202322038378.8U
Authority: CN
Inventors: 韩文刚; 卢雨龙; 曹云飞; 裴小娟; 赵豪儒; 于聪; 姜涛; 吕宁; 计结胜; 孙立峣
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-01-05
Anticipated expiration: 2033-07-31

Abstract

The utility model provides a power battery high-voltage electric connection structure and a power battery with the same, wherein the power battery high-voltage electric connection structure comprises: a high pressure connection; the high-voltage movable terminal (1), high-voltage movable terminal (1) is located the top of high-voltage connecting piece, clearance has between high-voltage movable terminal (1) and the high-voltage connecting piece, high-voltage movable terminal (1) has Rong Xikong (12) that are used for holding soldering tin post (11), rong Xikong (12) are the blind hole, rong Xikong (12) opening is provided with at least one hourglass tin hole (2) on the bottom lateral wall of Rong Xikong (12) towards the top of high-voltage movable terminal (1), high-voltage movable terminal (1) carries out the soldering in-process with the high-voltage connecting piece, soldering tin post (11) after melting gets into the clearance through hourglass tin hole (2) to make high-voltage movable terminal (1) and high-voltage connecting piece fixed connection. The problem that the space occupancy rate of the high-voltage electric connection structure in the battery pack in the prior art is too high is solved.

Description

High-voltage power battery connection structure and power battery with same

Technical Field

The utility model relates to the technical field of high-voltage electric connection design of power batteries, in particular to a high-voltage electric connection structure of a power battery and the power battery with the high-voltage electric connection structure.

Background

The existing power battery high-voltage electric connection technology generally adopts a bolt connection mode, namely, a high-voltage to-be-connected piece and a high-voltage connection terminal are directly connected through bolts, so that the defects of large occupied space, complex maintenance and the like of a connection structure exist.

In view of the above problems in the prior art, no effective solution has been proposed at present.

Disclosure of Invention

The utility model mainly aims to provide a high-voltage electric connection structure of a power battery and the power battery with the same, so as to solve the problem of overhigh space occupation rate of the high-voltage electric connection structure in a battery pack in the prior art.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a power cell high-voltage electrical connection structure comprising: a high pressure connection; the high-voltage movable terminal is located the top of high-voltage connecting piece, has the clearance between high-voltage movable terminal and the high-voltage connecting piece, and high-voltage movable terminal has Rong Xikong that is used for holding the soldering tin post, rong Xikong are the blind hole, and Rong Xikong opening is provided with at least one hourglass tin hole on Rong Xikong's the bottom lateral wall towards the top of high-voltage movable terminal, and high-voltage movable terminal carries out the soldering in-process with the high-voltage connecting piece, and the soldering tin post after melting gets into the clearance through hourglass tin hole to make high-voltage movable terminal and high-voltage connecting piece fixed connection.

Further, the solder columns are in transition fit with Rong Xikong.

Further, the plurality of tin leakage holes are arranged at intervals in the diameter direction of the bottom side wall of the plurality of tin leakage Kong Yanrong tin holes.

Further, a plurality of tin leakage holes are formed, and the bottom side walls of the tin leakage holes Kong Yanrong are arranged at intervals in the circumferential direction.

Further, one end of the high-voltage connecting piece, which faces the high-voltage movable terminal, is provided with Chu Xicang, chu Xicang, which are arranged at the bottom of the tin leakage hole, and at least part of the melted tin column is positioned in Chu Xicang after the high-voltage movable terminal and the high-voltage connecting piece are soldered.

Further, the central axis of Chu Xicang is disposed coincident with the central axis of Rong Xikong.

Further, the diameter of the tin leakage hole is gradually reduced along the height direction of the tin leakage hole.

Further, the height of the peripheral edge of the bottom sidewall of Rong Xikong is greater than the height of the middle of the bottom sidewall of Rong Xikong.

Further, the high-voltage connecting pieces are multiple, the high-voltage movable terminals are multiple, and the high-voltage connecting pieces and the high-voltage movable terminals are arranged in a one-to-one correspondence mode.

According to one aspect of the utility model, a power battery is provided, which comprises a power battery high-voltage electric connection structure, wherein the power battery high-voltage electric connection structure is the power battery high-voltage electric connection structure.

By adopting the technical scheme of the utility model, the Rong Xikong is arranged on the high-voltage movable terminal, and the at least one tin leakage hole is arranged on the side wall of the bottom of the tin containing hole, so that stable tin soldering connection between the high-voltage movable terminal and the high-voltage connecting piece is realized, on one hand, the connection stability of the high-voltage movable terminal and the high-voltage connecting piece is improved, and on the other hand, the defect that a large space is occupied by adopting the bolt connection is avoided, and the space occupation rate of high-voltage electric connection of a power battery in the battery pack is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic structural view of a first embodiment of a high-voltage electrical connection structure of a power cell according to the present utility model;

fig. 2 shows a schematic structural view of a second embodiment of a high-voltage electrical connection structure of a power cell according to the present utility model;

fig. 3 shows a schematic structural view of a third embodiment of a high-voltage electrical connection structure of a power cell according to the present utility model.

Wherein the above figures include the following reference numerals:

1. a high voltage movable terminal; 11. a solder column; 12. rong Xikong;

2. and a tin leakage hole.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

As shown in fig. 1 to 3, according to a specific embodiment of the present application, there is provided a power battery high-voltage electrical connection structure, including: a high pressure connection; the high-voltage movable terminal 1, the high-voltage movable terminal 1 is located the top of high-voltage connecting piece, clearance has between high-voltage movable terminal 1 and the high-voltage connecting piece, high-voltage movable terminal 1 has Rong Xikong that is used for holding soldering tin post 11, rong Xikong is the blind hole, rong Xikong 12 opening is provided with at least one and leaks tin hole 2 on Rong Xikong's the bottom lateral wall towards the top of high-voltage movable terminal 1, in the soldering process is carried out to high-voltage movable terminal 1 and high-voltage connecting piece, molten soldering tin post 11 gets into the clearance through leaking tin hole 2 to make high-voltage movable terminal 1 and high-voltage connecting piece fixed connection.

By means of the technical scheme, rong Xikong is arranged on the high-voltage movable terminal 1, and at least one tin leakage hole 2 is formed in the side wall of the bottom of the tin containing hole 12, so that stable tin soldering connection is achieved between the high-voltage movable terminal 1 and a high-voltage connecting piece, on one hand, connection stability of the high-voltage movable terminal and the high-voltage connecting piece is improved, on the other hand, the defect that a large space is occupied by adopting bolt connection is avoided, and space occupation rate of high-voltage connection of a power battery in a battery pack is reduced.

Soldering is a metal connection technique commonly used to connect electronic components, pipes and metal parts. The connecting method is that tin and other alloy materials are applied to the connecting part while the connecting part is heated, so that the tin and other alloy materials are melted and fill in connecting gaps, and then cooled and solidified, thereby realizing the connection. Soldering can be divided into manual soldering and automated soldering. Manual soldering is typically performed using a hand-held soldering iron or gun, and the operator is required to heat and melt the solder wire or solder, then apply it to the joint, and then wait for cooling. The automatic tin soldering is finished by a welding robot or welding equipment, so that high-efficiency and high-precision welding can be realized. Soldering has many advantages such as low cost, easy operation, high connection strength, good reliability of the connection site, etc. By means of the technical scheme, the high-voltage connection safety of the power battery is improved through soldering tin welding, and meanwhile, the high-voltage connection safety device has high assembly performance and reliability.

Further, the solder columns 11 and Rong Xikong are in transition fit. The transition fit means that the fit gap between the solder columns 11 and Rong Xikong is neither loose nor tight in the sizing, and the size of the solder columns 11 is between the largest dimension and the smallest dimension of Rong Xikong 12 between the interference fit and the clearance fit. The transition fit has a certain degree of tightness, so that the two can be inserted or detached relatively easily in the assembly process, and meanwhile, the connection stability of the two can be ensured, so that the melting speed of the soldering tin column 11 is uniform.

The number of the tin leakage holes 2 is plural, and the tin leakage holes 2 are arranged at intervals along the diameter direction of the bottom side wall of the tin containing hole 12. This arrangement can make the molten tin received at the gap more uniform.

Further, the number of the tin leakage holes 2 is plural, and the tin leakage holes 2 are arranged at intervals along the circumferential direction of the bottom side wall of the tin containing hole 12. The arrangement can improve the flow rate of the molten tin, and further improve the efficiency of integral connection assembly.

Further, one end of the high-voltage connecting piece, which faces the high-voltage movable terminal 1, is provided with Chu Xicang, chu Xicang, which are arranged at the bottom of the tin leakage hole 2, and after the high-voltage movable terminal 1 and the high-voltage connecting piece are soldered, at least part of the melted tin column 11 is positioned in Chu Xicang. The molten tin in the molten state can be placed too much to influence the welding quality, and meanwhile, the connection strength of the molten tin and the molten tin can be further improved.

In an alternative embodiment, the diameter of the tin-plated hole 2 is gradually reduced along the height direction of the tin-plated hole 2. That is, the tin leakage hole 2 forms a funnel-shaped structure, so that the arrangement can play a role in guiding the molten tin, thereby accelerating the flow rate of the molten tin.

Further, the height of the peripheral edge of the bottom sidewall of Rong Xikong is greater than the height of the middle of the bottom sidewall of Rong Xikong. The bottom wall of the tin containing hole 12 is formed into a structure with low inside and high outside, which is beneficial to preventing tin liquid from accumulating on the edge and damaging welding quality.

Specifically, the number of high-voltage connectors is plural, the number of high-voltage movable terminals 1 is plural, and the plural high-voltage connectors are arranged in one-to-one correspondence with the plural high-voltage movable terminals 1.

Fig. 2 is a bottom view of the high-voltage connection terminal, wherein the hole is a tin leakage hole, and molten solder flows out through the tin leakage hole during welding and contacts with the high-voltage movable terminal (i.e., the high-voltage connection piece) to finish welding. Fig. 3 shows a cross-sectional view of the high voltage connection terminal with solder disposed in Rong Xikong and Rong Xikong at the bottom.

In an alternative embodiment, the high voltage connection terminal is square, but may be other shapes.

In an alternative embodiment, the high voltage connection terminal Rong Xikong can be in a tin-plated state or in a non-tin-plated state.

In an alternative embodiment, the high voltage connection terminal includes a single Rong Xikong, and may also include a plurality of tin-receiving holes.

In an alternative embodiment, the high voltage connection terminal is circular Rong Xikong, but may be other shapes.

According to a specific embodiment of the present utility model, there is provided a power battery including a power battery high-voltage electrical connection structure, the power battery high-voltage electrical connection structure being the power battery high-voltage electrical connection structure of the above embodiment.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

the high-voltage power battery connection structure comprises a high-voltage connection terminal, wherein the terminal can be used for high-voltage power battery connection in a battery pack of a pure electric vehicle and high-voltage power battery connection of other parts of the electric vehicle and other fields. The power battery high-voltage electric connection structure is fixed by soldering, so that the electric connection structure space is reduced, and stable installation of the power battery high-voltage electric connection can be realized. The power battery high-voltage electric connection structure has the advantages of simple design and simplified process, and can reduce the space occupation rate of the power battery high-voltage electric connection in the battery pack in a soldering mode, and improve the assembly stability of the power battery high-voltage electric connection and the convenience of assembly and maintenance.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the utility model.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A power battery high voltage electrical connection structure, comprising:

a high pressure connection;

the high-voltage movable terminal (1), high-voltage movable terminal (1) is located the top of high-voltage connecting piece, high-voltage movable terminal (1) with have the clearance between the high-voltage connecting piece, high-voltage movable terminal (1) has Rong Xikong (12) that are used for holding soldering tin post (11), rong Xikong (12) are the blind hole, rong Xikong (12) opening orientation high-voltage movable terminal (1)'s top, be provided with at least one hourglass tin hole (2) on Rong Xikong (12)'s the bottom lateral wall, high-voltage movable terminal (1) with high-voltage connecting piece carries out the soldering process, and molten soldering tin post (11) pass through hourglass tin hole (2) get into the clearance, so that high-voltage movable terminal (1) with high-voltage connecting piece fixed connection.

2. The high-voltage power battery connection structure according to claim 1, wherein the solder column (11) and the Rong Xikong (12) are in transition fit.

3. The high-voltage electrical connection structure of a power battery according to claim 1, wherein the number of the tin leakage holes (2) is plural, and the plurality of the tin leakage holes (2) are arranged at intervals along the diameter direction of the bottom side wall of the Rong Xikong (12).

4. The high-voltage electrical connection structure of a power battery according to claim 1, wherein the plurality of tin leakage holes (2) are provided, and the plurality of tin leakage holes (2) are provided at intervals along the circumferential direction of the bottom side wall of the Rong Xikong (12).

5. The high-voltage connection structure of the power battery according to claim 1, wherein a Chu Xicang is arranged at one end of the high-voltage connection piece, which faces the high-voltage movable terminal (1), the Chu Xicang is arranged at the bottom of the tin leakage hole (2), and at least part of the melted tin soldering column (11) is positioned in the Chu Xicang after the tin soldering of the high-voltage movable terminal (1) and the high-voltage connection piece is completed.

6. The high-voltage power cell connection structure according to claim 5, wherein a central axis of the Chu Xicang is disposed coincident with a central axis of the Rong Xikong (12).

7. The high-voltage electrical connection structure of a power battery according to claim 1, characterized in that the diameter of the tin leakage hole (2) is gradually reduced along the height direction of the tin leakage hole (2).

8. The power cell high voltage electrical connection structure of claim 1, wherein a height of a peripheral edge of the bottom side wall of the Rong Xikong (12) is greater than a height of a middle portion of the bottom side wall of the Rong Xikong (12).

9. The high-voltage connection structure of a power battery according to claim 1, wherein the number of the high-voltage connection members is plural, the number of the high-voltage movable terminals (1) is plural, and the plural high-voltage connection members are provided in one-to-one correspondence with the plural high-voltage movable terminals (1).

10. A power battery comprising a power battery high voltage electrical connection structure, characterized in that the power battery high voltage electrical connection structure is the power battery high voltage electrical connection structure of any one of claims 1 to 9.