CN220604912U

CN220604912U - Power battery low-voltage electricity connection structure and have its power battery

Info

Publication number: CN220604912U
Application number: CN202322038402.8U
Authority: CN
Inventors: 韩文刚; 张占江; 曹云飞; 李岩; 于聪; 尹芳芳; 王明; 刘艳迪; 王丹; 孟祥宇
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-03-15
Anticipated expiration: 2033-07-31

Abstract

The utility model provides a power battery low-voltage electrical connection structure and a power battery with the same, wherein the power battery low-voltage electrical connection structure comprises: the top of the pole (1) is provided with a Rong Xicang (11); the low-voltage connecting piece comprises a low-voltage terminal (2), the low-voltage terminal (2) is arranged at the top of the Rong Xicang (11), a tin passing hole for a welding tin column (3) to pass through is formed in the low-voltage terminal (2), the tin passing hole penetrates through the low-voltage terminal (2), and the low-voltage terminal (2) is connected with the pole column (1) through tin soldering. By adopting the technical scheme of the application, the problem that the power battery in the prior art is unreliable in operation due to unreasonable design of the low-voltage electric connection structure is effectively solved.

Description

Power battery low-voltage electricity connection structure and have its power battery

Technical Field

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

Background

The single units are core components of the battery system of the electric automobile and are connected through low-voltage terminals. Traditional square pole low pressure connection uses spot welding's connected mode. The connecting method can lead to corrosion of welding spots, further lead to unbalanced resistance at the welding spots, increase of the connecting resistance once the connecting spots are loosened, and increase of overcurrent temperature of the connecting parts can cause safety accidents of the power battery. Meanwhile, the device has the defect of complex maintenance.

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 power battery low-voltage electric connection structure and a power battery with the same, so as to solve the problem that the power battery in the prior art is unreliable in operation due to unreasonable design of the low-voltage electric connection structure.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a power battery piezoelectric connection structure comprising: the top of the pole is provided with Rong Xicang; the low-voltage connecting piece comprises a low-voltage terminal, the low-voltage terminal is arranged at the top of Rong Xicang, a tin passing hole for a welding tin column to pass through is formed in the low-voltage terminal, the tin passing hole penetrates through the low-voltage terminal, and the low-voltage terminal is connected with the pole column through tin soldering.

Further, the solder columns and the solder vias are in transition fit.

Further, the welding tin column penetrates through the tin through hole, and two ends of the welding tin column protrude out of the surface of the corresponding low-voltage terminal respectively.

Further, the central axis of the soldering tin post is arranged to coincide with the central axis of Rong Xicang.

Further, an opening is formed in the top end surface of the post Rong Xicang, and the opening is located at the bottom of the via hole.

Further, a plurality of annular grooves are formed in the welding tin column and are arranged at intervals along the length direction of the welding tin column, and the welding tin column is divided into a plurality of tin column sections by the plurality of annular grooves.

Further, the diameter at the opening of Rong Xicang is greater than the diameter of the solder post.

Further, a positioning member is provided on the top surface of the pole, the positioning member is detachably connected with the pole, and the shape of the positioning member is adapted to the outer contour of at least part of the low-voltage terminal.

Further, the plurality of poles are provided, the low-voltage connecting piece comprises a plurality of low-voltage terminals, the plurality of low-voltage terminals are arranged in one-to-one correspondence with the plurality of poles, and the low-voltage terminals are connected into a whole through a plate-shaped member.

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

By adopting the technical scheme, the low-voltage terminal is provided with the tin passing hole through which the welding tin column passes, and the low-voltage terminal is connected with the pole column by adopting tin soldering, so that the defect that the resistance of the position is unbalanced due to corrosion at the connecting position caused by electric welding in the prior art is avoided, the problem that the power battery is unreliable in operation due to unreasonable design of a low-voltage electric connection structure in the prior art is solved, and meanwhile, the connection stability of the low-voltage electric connection and the convenience of assembly and maintenance can be improved.

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 an embodiment of a power cell low-voltage electrical connection structure according to the present utility model.

Wherein the above figures include the following reference numerals:

1. a pole; 11. rong Xicang;

2. a low voltage terminal;

3. and welding tin columns.

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.

Referring to fig. 1, according to an embodiment of the present application, there is provided a power battery piezoelectric connection structure, including: the top of the pole 1 is provided with a Rong Xicang 11; the low-voltage connecting piece comprises a low-voltage terminal 2, the low-voltage terminal 2 is arranged at the top of Rong Xicang 11, a tin passing hole for a welding tin column 3 to pass through is formed in the low-voltage terminal 2, the tin passing hole penetrates through the low-voltage terminal 2, and the low-voltage terminal 2 is connected with the pole column 1 through tin soldering.

By means of the technical scheme, through the tin through holes for the welding tin column 3 to pass through are formed in the low-voltage terminal 2, the low-voltage terminal 2 is connected with the pole column 1 in a tin soldering mode, the defect that corrosion is prone to occur at the connecting position caused by electric welding in the prior art to cause unbalance resistance of the connecting position is avoided, and therefore the problem that the power battery is unreliable in operation due to unreasonable design of a low-voltage electric connection structure in the prior art is solved, and meanwhile the connection stability of the low-voltage electric connection and the convenience of assembly and maintenance can be improved.

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 safety of low-voltage connection of the power battery is improved through soldering tin welding, and meanwhile, the power battery has high assembly performance and reliability.

Specifically, after the low voltage terminal 2 and the pole 1 are welded, at least part of molten tin is filled in Rong Xicang.

Further, the solder columns 3 and the solder vias are in transition fit. The transition fit means that the fit gap between the solder post 3 and the via is neither loose nor tight in the sizing, and the size of the solder post 3 is between the largest size and the smallest size of the via between the interference fit and the clearance fit. The transition fit has certain elasticity, can make both insert or dismantle relatively easily in the assembly process, also guarantee its connection stability simultaneously for the melting speed of welding tin post 3 is comparatively unified.

Alternatively, the solder columns 3 and the solder vias may also be interference fit. The interference fit refers to a fit manner in which the fit gap between the solder post 3 and the via is smaller than the dimensional tolerance in the dimensional design.

Further, the solder columns 3 are disposed in the solder through holes in a penetrating manner, and two ends of the solder columns 3 respectively protrude out of the surfaces of the corresponding low-voltage terminals 2. The arrangement is convenient for engineering personnel to execute soldering operation, and is also beneficial to improving the welding quality.

Further, the center axis of the solder column 3 is arranged to coincide with the center axis of Rong Xicang 11. The arrangement is that the molten tin generated after the welding tin column 3 is melted can enter the tin containing bin 11, so that the irregular flow of the molten tin is prevented from affecting the welding quality.

Specifically, the Rong Xicang 11 has an opening formed on the top end face of the pole 1, the opening being located at the bottom of the via hole. The arrangement can enable the tin passing hole and the Rong Xi bin 11 to form a communicating channel, so that the circulation of tin liquid is facilitated.

Further, a plurality of annular grooves are formed in the solder tin column 3, the annular grooves are arranged at intervals along the length direction of the solder tin column 3, and the solder tin column 3 is divided into a plurality of tin column sections by the annular grooves. The annular groove is utilized to enable a welder to quantitatively control the use of the welding tin column 3, so that the welding quality is improved. Specifically, a detachable card is arranged on the top end surface of the low-voltage terminal 2, and the usage amount of the welding tin post 3 can be observed and recorded through the cooperation of the card and a plurality of annular grooves.

Rong Xicang 11 the diameter of the opening is larger than the diameter of the solder post 3.

Further, a positioning member is provided on the top surface of the pole 1, the positioning member being detachably connected to the pole 1, the shape of the positioning member being adapted to the outer contour of at least part of the low voltage terminal 2. The alignment of the solder columns 3 and Rong Xicang 11 can be effectively ensured by the positioning members.

Further, the plurality of poles 1 is provided, the low voltage connector includes a plurality of low voltage terminals 2, the plurality of low voltage terminals 2 are disposed in one-to-one correspondence with the plurality of poles 1, and each low voltage terminal 2 is connected in one body by a plate-shaped member. For example, the low-voltage connector includes a substrate having a plate-like structure, a plurality of low-voltage terminals 2 are disposed on the substrate along a length direction at intervals, a solder through hole is disposed on each low-voltage terminal 2, and the solder through holes are disposed in one-to-one correspondence with the plurality of poles 1.

In an alternative embodiment, the pole is square, but may be rectangular, circular, oval, or the like.

In an alternative embodiment, the posts are spherical Rong Xicang, can be tin plated surfaces, and Rong Xicang can be any shape designed by the engineering personnel.

In an alternative embodiment, rong Xicang can be in a blank or tin state.

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

In an alternative embodiment, the low voltage terminal is a cylindrical tin post, and may also include a plurality of tin posts, and the shape of the tin post may be any other shape designed by engineering personnel.

According to a specific embodiment of the present utility model, there is provided a power battery including a power battery low-voltage electrical connection structure, the power battery low-voltage electrical connection structure being the power battery low-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 novel power battery low-voltage electrical connection structure can be used for low-voltage electrical connection between monomers in a battery pack of a pure electric vehicle. Adopt soldering tin welded fixed mode, convenient maintenance is dismantled, can realize the stable installation of electric connection simultaneously. The double-end tin coating is adopted for the low-voltage electric connection structure. The pole post low-voltage electric connection structure has simple design and simplified process, and can improve the assembly stability of electric connection and the convenience of assembly and maintenance through a soldering tin welding mode. By adopting the technical scheme, the safety of low-voltage connection of the power battery is improved, and meanwhile, the power battery has higher assembly property and reliability.

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 low voltage electrical connection structure, comprising:

a pole (1), wherein a Rong Xicang (11) is arranged at the top of the pole (1);

the low-voltage connecting piece, the low-voltage connecting piece includes low-voltage terminal (2), low-voltage terminal (2) set up in Rong Xicang (11) top, be provided with the solder passing hole that supplies welding tin post (3) to pass on low-voltage terminal (2), the solder passing hole runs through low-voltage terminal (2) set up, low-voltage terminal (2) with utmost point post (1) adoption soldering is connected.

2. The power battery low-voltage electrical connection structure according to claim 1, characterized in that the solder tin post (3) and the via hole are in transition fit.

3. The power battery low-voltage electrical connection structure according to claim 1, wherein the solder columns (3) are disposed in the solder holes in a penetrating manner, and two ends of the solder columns (3) protrude from the surfaces of the corresponding low-voltage terminals (2).

4. The power battery low-voltage electrical connection structure according to claim 1, wherein the central axis of the solder post (3) is arranged coincident with the central axis of the Rong Xicang (11).

5. The power cell low-voltage electrical connection structure according to claim 1, wherein the Rong Xicang (11) is formed with an opening on the top end face of the post (1), the opening being located at the bottom of the via hole.

6. The power battery low-voltage electrical connection structure according to claim 1, wherein a plurality of annular grooves are provided on the solder tin column (3), a plurality of the annular grooves are provided at intervals along the length direction of the solder tin column (3), and the plurality of the annular grooves divide the solder tin column (3) into a plurality of tin column sections.

7. The power cell low voltage electrical connection structure according to claim 1, characterized in that the diameter of the opening of the Rong Xicang (11) is larger than the diameter of the soldering tin post (3).

8. The power battery low-voltage electrical connection structure according to claim 1, characterized in that a positioning member is provided on the top surface of the pole (1), said positioning member being detachably connected with the pole (1), the shape of said positioning member being adapted to the outer contour of at least part of the low-voltage terminal (2).

9. The low-voltage power battery connection structure according to claim 1, wherein the plurality of the poles (1) is provided, the low-voltage connection member includes a plurality of low-voltage terminals (2), the plurality of low-voltage terminals (2) are provided in one-to-one correspondence with the plurality of the poles (1), and each of the low-voltage terminals (2) is integrally connected by a plate-shaped member.

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