CN220830008U - Sampling member and battery - Google Patents

Abstract

The application provides a sampling piece and a battery, wherein the sampling piece comprises a first connecting structure, a second connecting structure and a buffer structure, the buffer structure is connected between the first connecting structure and the second connecting structure, the first connecting structure comprises a flat piece part and a folded part, an included angle exists between the plane of the flat piece part and the plane of the folded part, and the distance between the joint between the folded part and the flat piece part and the peripheral edge of the flat piece part is larger than zero. So set up, in the equipment of battery is applied to this sampling piece, in first connection structure department, when folding part and plain film portion all are connected with the PCB board electricity, owing to folding part position plain film portion intermediate position has equivalent to having shortened the conducting path, and the multiposition electricity is connected moreover, has increased the electricity and has switched on effective area, has reduced the internal resistance of sampling piece, has solved the problem of how to reduce the weakening influence of sampling piece for battery information sampling to battery discharge current among the prior art.

Description

Sampling member and battery

Technical Field

The application relates to the technical field of battery production, in particular to a sampling piece and a battery.

Background

The battery information sampling is to monitor the battery in real time to obtain parameters such as voltage, current and temperature of the battery, and information such as the health state and the residual capacity of the battery. Through battery information sampling, abnormal conditions of the battery can be found in time, and conditions such as overdischarge and overcharge of the battery are avoided, so that the safety and the service life of the battery are guaranteed.

In general, the sampling is performed by connecting a sampling member between the battery cell and a PCB board of the battery management system, so that state information of the battery cell is transmitted through the sampling member. The sampling member is used as a conductive structure, and because current passes through the sampling member and the sampling member has certain internal resistance, the discharging current of the battery can be weakened to a certain extent in the working process of the battery.

Disclosure of utility model

In view of the above, the present application provides a sampling member and a battery, so as to solve the problem of how to reduce the weakening effect of the sampling member for battery information sampling on the discharge current of the battery in the prior art.

In order to achieve the above purpose, the present application provides the following technical solutions:

A sampling member comprising:

A first connection structure;

a second connection structure;

A buffer structure connected between the first connection structure and the second connection structure;

The first connecting structure comprises a flat piece part and a folded part, wherein an included angle exists between the plane where the flat piece part is located and the plane where the folded part is located, and the distance between the folded part and the connecting part between the flat piece part and the peripheral edge of the flat piece part is larger than zero.

Optionally, the flat sheet portion has an opening, the folded portion is integrally connected with the flat sheet portion, and the two folded portions are respectively connected to the inner side wall of the opening at intervals, and the plane where the flat sheet portion is located is perpendicular to the plane where the folded portion is located.

Optionally, the distance between the connection point of any folded portion and the flat sheet portion and the nearest distance between the connection point of any folded portion and the flat sheet portion and the peripheral edge of the flat sheet portion is a, and the distance between the connection points of two folded portions and the flat sheet portion is B, where a and B satisfy: A/B is more than or equal to 0.2 and less than or equal to 0.8.

Optionally, the buffer structure is a pleated structure.

Optionally, the cross-sectional shape of the buffer structure includes at least one of a wave shape, a C shape, an M shape, an N shape, or a Z shape along the extending direction of the buffer structure.

Optionally, the buffer structure is provided with two buffer structures and is arranged at intervals, and the first connecting structure, the second connecting structure and the two buffer structures are annularly arranged and are provided with interval holes.

The battery comprises a shell, a battery core, a PCB and sampling pieces in any one of the above, wherein a plurality of battery cores are arranged in the shell in an array manner, the lugs of the adjacent battery cores are mutually overlapped, the first connecting structure is connected with the PCB, and the second connecting structure is connected with the lugs.

Optionally, the PCB board is provided with a slot, the folded part is inserted in the slot and electrically connected with the PCB board, the flat piece part is positioned on one side of the PCB board far away from the battery cell, the folded part penetrates through the PCB board, and the folded part and the top edge sealing of the battery cell are arranged at intervals.

Optionally, the tab includes:

a vertical section extending along the height direction of the battery cell;

a transverse section opposite to the upright Duan Fanshe;

in the adjacent two pole lugs, the vertical sections are arranged at intervals relatively, and the transverse sections are mutually overlapped.

Optionally, the PCB board includes:

The plate body is provided with a bonding pad;

The wiring terminal is arranged on the board body and is electrically connected with the bonding pad;

The flat piece part is welded on the bonding pad, and the folded part is spliced with the bonding pad.

The application provides a sampling piece, which comprises a first connecting structure, a second connecting structure and a buffer structure, wherein the buffer structure is connected between the first connecting structure and the second connecting structure, the first connecting structure comprises a flat piece part and a folded part, an included angle exists between the plane of the flat piece part and the plane of the folded part, and the distance between the connecting part between the folded part and the flat piece part and the peripheral edge of the flat piece part is larger than zero. The first connecting structure is connected with the first external connecting piece in the installation environment, the second connecting structure is connected with the second external connecting piece in the installation environment, the first external connecting piece is generally a PCB (printed circuit board), the second external connecting piece is generally a tab or a bus bar, and when the folded part and the flat part are electrically connected with the PCB, the folded part is positioned at the middle position of the flat part, which is equivalent to shortening the conducting path, and the multi-position electric connection is realized, the electric conduction effective area is increased, the internal resistance of the sampling piece is reduced, and the problem of how to reduce the weakening effect of the sampling piece for battery information sampling on the discharging current of the battery in the prior art is solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic front view of a sample member according to an embodiment of the present application;

FIG. 2 is a schematic rear view of a sample member according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a battery according to an embodiment of the present application;

fig. 4 is a top view of a battery provided by an embodiment of the present application;

FIG. 5 is a cross-sectional view taken at O-O in FIG. 4;

Fig. 6 is a schematic structural diagram at X in fig. 5.

In fig. 1-6:

1. A sampling member; 2. a PCB board; 3. a battery cell; 4. a housing;

11. a first connection structure; 12. a second connection structure; 13. a buffer structure; 14. a spacer hole;

111. A flat piece part; 112. a folded part; 113. opening holes;

31. A tab;

311. A vertical section; 312. and a transverse section.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1-3, an embodiment of the present application provides a sampling member 1, which includes a first connection structure 11, a second connection structure 12, and a buffer structure 13; the first connecting structure 11 is used for connecting with a first external connection piece, the first connecting structure 11 comprises a flat piece part 111 and a folded part 112, an included angle exists between a plane where the flat piece part 111 is located and a plane where the folded part 112 is located, the distance between the connecting part between the folded part 112 and the flat piece part 111 and the peripheral edge of the flat piece part 111 is greater than zero, and the first external connection piece is generally a PCB 2; the second connection structure 12 is used for connecting with a second external connection member, and the second external connection member is typically a tab 31 or a busbar; the buffer structure 13 is connected between the first connection structure 11 and the second connection structure 12. Specifically, the flat sheet portion 111 is attached to the PCB 2 and welded at the edge, and the folded portion 112 is inserted into the PCB 2, and optionally reinforced by welding.

So set up, in applying this sampling piece 1 to the equipment of battery, make first connection structure 11 be connected with the first external connection spare in the installation environment, and second connection structure 12 is connected with the second external connection spare in the installation environment, in first connection structure 11 department, when folding portion 112 and flat piece portion 111 all are connected with PCB board 2 electricity, because folding portion 112 is located flat piece portion 111 intermediate position, it is equivalent to having shortened the conducting path, and the multiposition electricity is connected, the effective area of electric conduction has been increased, the internal resistance of sampling piece 1 has been reduced, how reduce the problem of the weakening influence of sampling piece 1 to battery discharge current that battery information sampling was used among the prior art has been solved.

The length of the first connecting structure 11 is generally 8mm to 10mm, and the distance between the joint between the folded portion 112 and the flat portion 111 and the peripheral edge of the flat portion 111 may be 1.5mm to 3.5mm.

The whole body of the sampling member 1 can be made of nickel material, nickel-cobalt alloy, nickel-iron alloy or nickel-copper alloy.

In addition, the second connection structure 12 may be specifically provided as a flat sheet-like structure on the same extension plane as the flat sheet portion 111 of the first connection structure 11. In this way, the second connection structure 12 and the tab 31 can be welded and fixed while maintaining a sufficiently large surface contact.

In a preferred embodiment, the flat sheet portion 111 has an opening 113, the folded portion 112 and the flat sheet portion 111 are integrally connected, the folded portion 112 is folded with respect to the opening 113, and the two folded portions 112 are respectively connected to the inner side wall of the opening 113 at intervals, and the plane of the flat sheet portion 111 is perpendicular to the plane of the folded portion 112.

The opening 113 is preferably provided at the center of the flat piece portion 111.

So arranged, the two oppositely arranged folded parts 112 are arranged in the opening 113, the stress points are symmetrical, and the whole installation is more stable; on the other hand, the folded part 112 is processed from the plane structure where the flat sheet part 111 is located, so that the integrated structure is more stable, the structural strength is good, and the processing is easy.

In a specific embodiment, the connection between any one of the folds 112 and the flat sheet 111 is located at a distance a from the nearest peripheral edge of the flat sheet 111, and the distance between the two folds 112 and the connection of the flat sheet 111 is B, where a and B satisfy: A/B is more than or equal to 0.2 and less than or equal to 0.8.

So set up, on the basis of guaranteeing sampling piece 1 overall structure intensity, reduce materials, be favorable to controlling manufacturing cost. The A/B is preferably set to 0.5, and the overall parameters of the structural strength, rigidity and resistance of the whole sample member 1 are optimal under the conditions of experiments and simulation.

In a specific embodiment, the buffer structure 13 is a pleated structure. In this way, the buffer structure 13 forms a plurality of deformation spaces aligned in the force receiving direction, and allows a certain deformation to occur in the vertical direction of the sampling member 1, so that the deformation buffer effect is good. The folding direction of the folds of the buffer structure 13 is preferably arranged along the line direction of the first connection structure 11 and the second connection structure 12.

Further, along the extending direction of the buffer structure 13, the cross-sectional shape of the buffer structure 13 includes at least one of a wavy shape or a C-shape or an M-shape or an N-shape or a Z-shape. The present application preferably provides the cushioning structure 13 with a generally wavy shape.

In another preferred embodiment, the buffer structure 13 is provided with two and spaced apart, the first connection structure 11, the second connection structure 12 and the two buffer structures 13 are annularly arranged and formed with spaced apart holes 14. The spacing holes 14 are rectangular.

So set up, buffer structure 13 is more easily deformed by force, and interval hole 14 also can follow and produce slight deformation, so provide the deformation accommodation of multiple directions, optimize the buffering effect, interval hole 14 is located the central point of whole sampling piece 1 put, the structure pairwise symmetry of surrounding distribution, structural distribution is symmetrical, overall structure is difficult for tearing because of the stress, has also kept good deformation buffer capacity, has taken into account structural strength and cushioning effect.

In a preferred embodiment, the buffer structure 13 is integrally formed with the first connection structure 11 and the second connection structure 12. In this way, the sampling member 1 is integrated as a whole, providing reliable structural conditions for deformation buffering while the buffer structure 13 remains connected to the first connection structure 11 and the second connection structure 12.

Specifically, the buffer structure 13, the first connecting structure 11 and the second connecting structure 12 may be integrally formed by stamping or casting.

In another specific embodiment, the peripheral edges of the first connection structure 11, the buffer structure 13 and the second connection structure 12, which are orthographically projected on a horizontal plane, are rectangular. Thus, each edge of the sampling member 1 is neat, no concave-convex is generated, no stress concentration point is generated, and the structural strength is good. In addition, corners of the rectangular edges are preferably chamfered or rounded, which is advantageous in terms of better shape stability of the edges.

Based on the above-mentioned sampling member 1, the embodiment of the application further provides a battery, which comprises a housing 4, electric cores 3, a PCB board 2 and the above-mentioned sampling member 1, wherein a plurality of electric cores 3 are arranged in an array in the housing 4, the tabs 31 of the adjacent electric cores 3 are mutually overlapped, the first connection structure 11 is welded with the PCB board 2, and the second connection structure 12 is welded with the tabs 31. Since the battery has the sampling member 1, the beneficial effects of the battery due to the sampling member 1 are shown in the above description, and will not be described herein.

In a specific embodiment, the PCB board 2 includes a board body and a connection terminal; the plate body is provided with a bonding pad; the wiring terminal is arranged on the board body and is electrically connected with the bonding pad; wherein the flat part 111 is welded on the bonding pad, and the folded part 112 is spliced with the bonding pad.

Therefore, the wiring terminal is connected, so that the voltage and current information collected by the sampling sheet can be transmitted out through the circuit in a concentrated manner; the bonding pads provide accurate bonding locations for the sampling members 1, facilitating quick assembly.

In a specific embodiment, the PCB 2 is provided with a slot, and the folded portion 112 is inserted into the slot from the upper surface or the lower surface of the PCB 2 and electrically connected to the PCB 2, that is, the sample member 1 is connected to both the upper surface and the lower surface of the PCB 2. Specifically, the flat sheet portion 111 is welded to the first external member, or the folded portion 112 is welded to the first external member, or both the flat sheet portion 111 and the folded portion 112 are welded to the first external member.

So arranged, the flat sheet portion 111 is attached to the bonding pad and soldered, the folded portion 112 is inserted into the PCB 2 and soldered to the bonding pad, and the soldering at the folded portion 112 may be specifically reflow soldering. In this way, the composite connection formed between the first connection structure 11 and the PCB board 2 is stable, which is beneficial to enhancing the capability of the sample member 1 to bear vibration, and the electrical connection is stable and reliable, which is beneficial to ensuring the stability of the module voltage internal resistance.

Note that, the folded portion 112 may be inserted into the PCB 2, specifically, may be in a state of penetrating the PCB 2, or may be in a state of not penetrating the PCB 2.

In a preferred embodiment, the flat sheet 111 is located on a side of the PCB 2 away from the battery cell 3, the folded portion 112 penetrates the PCB 2, and the folded portion 112 is spaced from the top edge of the battery cell 3. The banding of the electric core 3 is the protection structure covered by the winding core main body, and the top banding is the banding of the side where the tab 31 is located, and is opposite to the PCB 2.

So set up, on the one hand, the grafting relation of folded part 112 and PCB board 2 is firm, stress relation is even, and on the other hand has the space between folded part 112 and the top edge of electric core 3, can guarantee when the battery receives the vibration, even have slight downshifting because of the reason folded part 112 of sampling piece 1, also can guarantee the safety of electric core 3.

As shown in fig. 4 to 6, in another preferred embodiment, the tab 31 includes a vertical section 311 and a horizontal section 312, which are L-shaped; the vertical section 311 extends along the height direction of the battery cell 3; transverse segment 312 is opposite upright Duan Fanshe; in the two adjacent tabs 31, the vertical sections 311 are disposed at opposite intervals, and the transverse sections 312 overlap each other.

In this way, since the tabs 31 are bent and overlapped with each other, the vertical section 311 is supported below the horizontal section 312, so that a space is formed between the vertical section 311 and the vertical section 311, so that the lower part of the horizontal section 312 is suspended, the tabs 31 have a deformation space, the sampling piece 1 is connected to the tabs 31 when the sampling piece 1 is vibrated in the use environment, the horizontal section 312 can be displaced by a small extent, and the whole tab 31 is deformed moderately to absorb vibration, so that a better buffering vibration-damping effect can be obtained.

The basic principles of the present application have been described above in connection with specific embodiments, but it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be construed as necessarily possessed by the various embodiments of the application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are used for more clearly describing the technical solutions, and are not intended to limit the scope of the present application.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims (10)

1. A sampling member, comprising:

a first connection structure (11);

a second connection structure (12);

A buffer structure (13) connected between the first connection structure (11) and the second connection structure (12);

The first connecting structure (11) comprises a flat sheet part (111) and a folded part (112), an included angle exists between the plane where the flat sheet part (111) is located and the plane where the folded part (112) is located, and the distance between the connecting part between the folded part (112) and the flat sheet part (111) and the peripheral edge of the flat sheet part (111) is larger than zero.

2. The sampling piece according to claim 1, wherein the flat piece portion (111) is provided with an opening (113), the folded portion (112) and the flat piece portion (111) are integrally connected, the two folded portions (112) are respectively connected to the inner side wall of the opening (113) at intervals, and the plane of the flat piece portion (111) is perpendicular to the plane of the folded portion (112).

3. The sample piece according to claim 1, characterized in that the distance a between the connection of any one of the folds (112) and the flat piece (111) and the nearest peripheral edge of the flat piece (111) is the distance a, and the distance B between the connection of two folds (112) and the flat piece (111) is the distance B, wherein a and B satisfy: A/B is more than or equal to 0.2 and less than or equal to 0.8.

4. A sampling element according to claim 1, characterized in that the buffer structure (13) is a pleated structure.

5. The sampling member according to claim 4, characterized in that the cross-sectional shape of the buffer structure (13) along the extension direction of the buffer structure (13) comprises at least one of a wave shape, a C shape, an M shape, an N shape or a Z shape.

6. A sampling member according to claim 1, characterized in that the buffer structures (13) are provided in two and spaced apart arrangement, the first connection structure (11), the second connection structure (12) and the two buffer structures (13) being annularly arranged and formed with spaced apart holes (14).

7. A battery, characterized in that, including casing (4), electric core (3), PCB board (2) and sample piece (1) according to any one of claims 1-6, array arrangement is equipped with a plurality of in casing (4) electric core (3), and adjacent utmost point ear (31) of electric core (3) overlap joint each other, first connection structure (11) are connected PCB board (2), second connection structure (12) are connected utmost point ear (31).

8. The battery according to claim 7, wherein the PCB (2) is provided with a slot, the folded portion (112) is inserted in the slot and electrically connected with the PCB (2), the flat portion (111) is located at one side of the PCB (2) far away from the battery cell (3), the folded portion (112) penetrates through the PCB (2), and the folded portion (112) and the top edge sealing of the battery cell (3) are arranged at intervals.

9. The battery according to claim 7, characterized in that the tab (31) comprises:

A vertical section (311) extending in the height direction of the battery cell (3);

a transverse section (312) which is folded relative to the vertical section (311);

In the adjacent two pole lugs (31), the vertical sections (311) are arranged at intervals relatively, and the transverse sections (312) are mutually overlapped.

10. The battery according to claim 7, characterized in that the PCB board (2) comprises:

The plate body is provided with a bonding pad;

The wiring terminal is arranged on the board body and is electrically connected with the bonding pad;

Wherein the flat sheet part (111) is welded on the bonding pad, and the folded part (112) is spliced with the bonding pad.