CN218039499U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: a first housing member; a second housing member; the metal coating is positioned between the first shell piece and the second shell piece and is welded with the first shell piece and the second shell piece respectively; the melting point of the metal coating is smaller than that of the first shell piece, the melting point of the metal coating is smaller than that of the second shell piece, and the corrosion rate of the metal coating is smaller than that of the first shell piece and the second shell piece. The metal coating is welded with the first shell piece and the second shell piece, so that the connection stability of the first shell piece and the second shell piece is ensured, and the corrosion rate of the metal coating is smaller than that of the first shell piece and the second shell piece, so that the first shell piece and the second shell piece are protected from corrosion at the connection position, the risk of corrosion of the first shell piece and the second shell piece is reduced, and the safety use performance of the battery is improved.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

The battery shell in the related art is mostly a metal shell, the metal shell is easy to corrode, and particularly, the joint of the shell is difficult to perform anticorrosion treatment, so that the corrosion risk is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a first housing member;

a second housing member;

the metal coating is positioned between the first shell piece and the second shell piece and is welded with the first shell piece and the second shell piece respectively;

the melting point of the metal coating is smaller than that of the first shell piece, the melting point of the metal coating is smaller than that of the second shell piece, and the corrosion rate of the metal coating is smaller than that of the first shell piece and the second shell piece.

The utility model discloses battery of embodiment includes first shell spare, second shell spare and metal coating, is connected with metal coating between first shell spare and the second shell spare. The metal coating is welded with the first shell piece and the second shell piece, so that the connection stability of the first shell piece and the second shell piece is ensured, the melting points of the first shell piece and the second shell piece are both larger than the melting point of the metal coating, the melting of the metal coating can be facilitated, the metal coating is ensured to be reliably welded with the first shell piece and the second shell piece, and the corrosion rate of the metal coating is smaller than that of the first shell piece and the second shell piece, so that the corrosion protection of the connecting position of the first shell piece and the second shell piece is realized, the corrosion risk of the first shell piece and the second shell piece is reduced, and the safety use performance of the battery is improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of a battery shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partial cross-sectional structure of a battery according to an exemplary embodiment;

FIG. 3 is a partially enlarged schematic view of a battery according to an exemplary embodiment;

FIG. 4 is an enlarged, fragmentary, schematic structural view of first and second housing members of a battery according to one exemplary embodiment;

FIG. 5 is an enlarged, fragmentary, schematic structural view of a battery according to another exemplary embodiment;

FIG. 6 is an enlarged partial schematic view of first and second housing pieces of a battery according to another exemplary embodiment.

The reference numerals are illustrated below:

10. a first housing member; 11. mounting grooves; 111. a bottom wall; 112. a side wall; 20. a second housing member; 30. and (3) coating the metal.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless explicitly specified or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood as a specific case by a person skilled in the art.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to 6, the battery includes: a first housing piece 10; a second housing piece 20; a metal coating 30, the metal coating 30 being located between the first and second case members 10 and 20 and being welded to the first and second case members 10 and 20, respectively; wherein the melting point of the metal coating 30 is less than the melting point of the first shell member 10, the melting point of the metal coating 30 is less than the melting point of the second shell member 20, and the corrosion rate of the metal coating 30 is less than that of the first and second shell members 10, 20.

The battery of one embodiment of the present invention includes a first case member 10, a second case member 20, and a metal coating 30, and the metal coating 30 is connected between the first case member 10 and the second case member 20. The metal coating 30 is welded with the first shell member 10 and the second shell member 20, so that the connection stability of the first shell member 10 and the second shell member 20 is ensured, the melting points of the first shell member 10 and the second shell member 20 are larger than the melting point of the metal coating 30, the melting of the metal coating 30 can be facilitated, the metal coating 30 is ensured to be reliably welded with the first shell member 10 and the second shell member 20, and the corrosion rate of the metal coating 30 is smaller than that of the first shell member 10 and the second shell member 20, so that the corrosion protection at the connection position of the first shell member 10 and the second shell member 20 is realized, the corrosion risk of the first shell member 10 and the second shell member 20 is reduced, and the safe use performance of the battery is improved.

It should be noted that, the first shell 10 and the second shell 20 may be two separate components, and the first shell 10 and the second shell 20 are connected by welding after being butted, and the metal coating 30 is disposed between the first shell 10 and the second shell 20, and the melting point of the metal coating 30 is lower than the melting point of the first shell 10 and the second shell 20, so that when the first shell 10 and the second shell 20 are welded, the metal coating 30 can be effectively melted to form a connection with the first shell 10 and the second shell 20, so that the connection position between the first shell 10 and the second shell 20 can be effectively formed, and the corrosion rate of the metal coating 30 is lower than that of the first shell 10, and the corrosion rate of the metal coating 30 is lower than that of the second shell 20, and the metal coating 30 is an anti-corrosion coating, so that the metal coating 30 can further protect the connection position between the first shell 10 and the second shell 20 on the basis of the connection between the first shell 10 and the second shell 20, and thereby reducing the risk of corrosion of the connection position between the first shell 10 and the second shell 20.

The corrosion rate of the metal coating 30 is smaller than that of the first and second housing parts 10, 20, the corrosion protection capability of the metal coating 30 is greater than that of the first housing part 10, and the corrosion protection capability of the metal coating 30 is greater than that of the second housing part 20. That is, the weight lost by the metal coating 30 per unit area is less than the weight lost by the first housing piece 10, and the weight lost by the metal coating 30 is less than the weight lost by the second housing piece 20 per unit time.

In some embodiments, it is not excluded that the first and second case members 10, 20 may be a unitary structure, the first and second case members 10, 20 are integrally formed, and the first and second case members 10, 20 may be subsequently butt-joined by welding, while the first and second case members 10, 20 are provided with a metallic coating 30 at the connection location.

In one embodiment, the melting point of the metal coating 30 is 150 ℃ to 800 ℃, so that the melting point of the metal coating 30 is lower than the melting points of the first and second case members 10 and 20, thereby ensuring that the metal coating 30 can be effectively melted, and thus ensuring the welding quality of the first and second case members 10 and 20.

The metal coating 30 has a melting point too low, which may cause the metal coating 30 to melt too early, and the fluid formed by the metal coating 30 is difficult to control, so that the fluid flows to other places, which may affect the welding quality of the first and second housing members 10 and 20 and may affect other places. The melting point of the metal coating 30 is too high, so that the metal coating 30 is melted too late, and the welding quality of the first shell member 10 and the second shell member 20 is affected, in the embodiment, the melting point of the metal coating 30 is controlled to be 150-800 ℃, so that the welding quality of the first shell member 10 and the second shell member 20 can be effectively ensured.

The melting point of the metal coating 30 may be 150 ℃, 160 ℃, 170 ℃, 175 ℃, 200 ℃, 210 ℃, 230 ℃, 250 ℃, 260 ℃, 270 ℃, 275 ℃, 280 ℃, 290 ℃, 300 ℃, 310 ℃, 330 ℃, 350 ℃, 360 ℃, 370 ℃, 375 ℃, 380 ℃, 390 ℃, 400 ℃, 410 ℃, 430 ℃, 450 ℃, 460 ℃, 470 ℃, 475 ℃, 480 ℃, 490 ℃, 500 ℃, 510 ℃, 530 ℃, 550 ℃, 560 ℃, 570 ℃, 575 ℃, 580 ℃, 590 ℃, 600 ℃, 610 ℃, 630 ℃, 650 ℃, 660 ℃, 670 ℃, 675 ℃, 680 ℃, 690 ℃, 700 ℃, 710 ℃, 730 ℃, 750 ℃, 760 ℃, 770 ℃, 775 ℃, 780 ℃, 785 ℃, 790 ℃, 795 ℃ or 800 ℃ and the like.

In one embodiment, the thickness of the metal coating 30 is 1 μm to 500 μm, so that the metal coating 30 can reliably protect the first and second case members 10 and 20, and the problem of overflow caused by the excessively thick metal coating 30 can be avoided, thereby affecting the welding quality of the battery.

The metal coating 30 has an excessively small thickness, which may not only fail to effectively connect with the first and second case members 10 and 20, but also have a relatively poor protective effect, while the metal coating 30 has an excessively large thickness, which may not only facilitate the arrangement of the metal coating 30, but also may cause an overflow problem of the metal coating 30 during welding, thereby affecting the quality of the inside or outside of the first and second case members 10 and 20, and may not be easily removed when the metal coating 30 overflows into the inside of the first and second case members 10 and 20, which may affect the internal structures of the first and second case members 10 and 20.

The thickness of the metal coating 30 may be 1 μm, 2 μm, 3 μm, 5 μm, 10 μm, 20 μm, 30 μm, 50 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, 250 μm, 260 μm, 270 μm, 300 μm, 310 μm, 320 μm, 350 μm, 380 μm, 400 μm, 410 μm, 420 μm, 430 μm, 450 μm, 480 μm, 490 μm, 495 μm, 500 μm, or the like.

In one embodiment, the metal coating 30 is an anti-corrosion coating, which may refer to a structure resistant to corrosion by electrolyte, and the metal coating 30 may include tin, lead, or silver, or the metal coating 30 may include an alloy of tin, lead, silver, and copper, for example, the metal coating 30 may be a tin-copper alloy, the metal coating 30 may be a tin-silver-copper alloy, and the like, without limitation.

In one embodiment, the metal coating 30 is solder paste, which not only can achieve reliable soldering with the first and second housing members 10 and 20, but also can achieve corrosion protection of the first and second housing members 10 and 20, thereby ensuring safe use performance of the first and second housing members 10 and 20, and can conveniently achieve soldering connection of the first and second housing members 10 and 20 due to the presence of the solder paste.

Solder paste is disposed between the first and second casing pieces 10, 20, and when the first and second casing pieces 10, 20 are soldered, the solder paste melts and forms a reliable connection with the first and second casing pieces 10, 20, and a dense corrosion resistant layer can be formed after the solder paste has solidified, thereby improving the overall corrosion resistance of the first and second casing pieces 10, 20.

In one embodiment, the first housing member 10 comprises steel, and the second housing member 20 comprises steel, i.e., the first housing member 10 and the second housing member 20 made of steel are relatively susceptible to corrosion, so that the steel material can be effectively prevented from being relatively severely corroded by the metal coating 30 disposed between the first housing member 10 and the second housing member 20, thereby improving the safety performance of the battery.

The first housing piece 10 and the second housing piece 20 made of steel can be welded by solder paste, and a compact corrosion-resistant layer can be formed after the solder paste is welded, so that the first housing piece 10 and the second housing piece 20 are protected, and the problem of corrosion of the first housing piece 10 and the second housing piece 20 is effectively solved.

In one embodiment, the first housing piece 10 may be formed with a first receiving cavity, the second housing piece 20 may be formed with a second receiving cavity, and after the first housing piece 10 and the second housing piece 20 are connected, the first receiving cavity and the second receiving cavity may form a receiving space for receiving the battery cell.

In one embodiment, the first housing member 10 is a cover plate, that is, the second housing member 20 is formed with a receiving space for receiving the battery core, and by providing the first housing member 10 as the cover plate, the structure is simple, the molding is easy, and the connection between the first housing member 10 and the second housing member 20 can be facilitated, thereby improving the manufacturing efficiency of the battery.

In one embodiment, as shown in fig. 3 to 6 in combination, the first housing piece 10 is provided with a mounting slot 11, and at least a portion of the metal coating 30 is located within the mounting slot 11 to be welded with the first housing piece 10 and the second housing piece 20. By forming the mounting groove 11 on the first shell member 10, the metal coating 30 can be conveniently arranged, that is, the metal coating 30 can be reliably arranged in the mounting groove 11, which not only facilitates the operation, but also ensures that the metal coating 30 is arranged at a relatively fixed position, so that the metal coating 30 can be reliably connected with the first shell member 10 and the second shell member 20 when the first shell member 10 and the second shell member 20 are welded subsequently, and ensures that the metal coating 30 is welded at the relatively fixed position, thereby ensuring effective protection of the metal coating 30 on the first shell member 10 and the second shell member 20, and reducing the risk of corrosion at the connection position of the first shell member 10 and the second shell member 20.

Taking the metal coating 30 as an example, the solder paste may be disposed in the mounting groove 11, and then the first housing piece 10 and the second housing piece 20 are butted, and the solder paste is melted by welding the first housing piece 10 and the second housing piece 20, and the melted solder paste is located in the mounting groove 11 and is reliably connected with the first housing piece 10 and the second housing piece 20, so as to ensure the fixed connection of the first housing piece 10 and the second housing piece 20, and form a dense anti-corrosion layer on the solder paste, thereby achieving the effect of protecting the first housing piece 10 and the second housing piece 20, and effectively avoiding the corrosion problem of the first housing piece 10 and the second housing piece 20.

In one embodiment, as shown in fig. 3 and 4, the mounting slot 11 includes a bottom wall 111 and a side wall 112, the side wall 112 is disposed around one end of the bottom wall 111, and the other end of the bottom wall 111 intersects with the circumferential outer surface of the first housing piece 10, i.e., the mounting slot 11 may include only one bottom wall 111 and one side wall 112, so that the mounting slot 11 forms a non-circumferential closed structure, which not only facilitates the formation of the mounting slot 11, but also facilitates the butt joint of the first housing piece 10 and the second housing piece 20, and does not cause a problem of unusable structure due to relatively small errors.

In one embodiment, the metal coating 30 covers at least a portion of the bottom wall 111, i.e., the end faces of the first and second case members 10 and 20 may have the metal coating 30 therebetween, and the metal coating 30 is securely connected to the first and second case members 10 and 20 by welding and may securely protect the first and second case members 10 and 20.

In one embodiment, the metal coating 30 covers at least a portion of the side wall 112, and in this case, the metal coating 30 may be provided between the sides of the first and second case members 10 and 20, and the metal coating 30 is securely connected to the first and second case members 10 and 20 by welding, and the first and second case members 10 and 20 may be securely protected.

In one embodiment, as shown in connection with FIG. 3, the metal coating 30 covers both the bottom wall 111 and the side walls 112, thereby making it possible to form a secure protection of the first and second case members 10, 20 and also to improve the connection stability of the first and second case members 10, 20.

In one embodiment, as shown in fig. 5 and 6, the mounting slot 11 includes a bottom wall 111 and two opposite side walls 112, and the two opposite side walls 112 are respectively disposed around two opposite ends of the bottom wall 111, so that the mounting slot 11 can form a circumferentially closed structure, thereby enabling the metal coating 30 to be reliably received in the mounting slot 11, thereby ensuring that the metal coating 30 can be reliably connected with the first and second housing members 10 and 20, and thus effectively protecting the first and second housing members 10 and 20.

The metal coating 30 can cover at least one of the two side walls 112 and the bottom wall 111, thereby providing corrosion protection for the first and second housing pieces 10, 20. As shown in connection with fig. 5, the metal coating 30 may cover both the bottom wall 111 and the two side walls 112.

It should be noted that fig. 3 and 5 are only used to show that the metal coating 30 is disposed between the first housing member 10 and the second housing member 20, and further, to show that the metal coating 30 can be located in the mounting groove 11, and the specific structural form of the metal coating 30 is not limited.

In one embodiment, as shown in fig. 3 to 6, a portion of the second shell 20 is located in the mounting groove 11, so that the first shell 10 and the second shell 20 can be conveniently positioned during the mounting process, thereby improving the assembly efficiency of the first shell 10 and the second shell 20, enabling the first shell 10 and the second shell 20 to be reliably connected with the metal coating 30, thereby improving the connection stability of the first shell 10 and the second shell 20, and enabling the contact area of the metal coating 30 with the first shell 10 and the second shell 20 to be relatively large, thereby improving the protection effect of the metal coating 30 on the first shell 10 and the second shell 20.

In one embodiment, the battery further includes a cell located within the first and second casing members 10, 20.

It is to be understood that the battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The cell refers to a unit formed by winding or laminating a stacking part, wherein the stacking part comprises a first pole piece, a partition and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active materials.

The battery cell can comprise a battery cell main body and a pole lug part, wherein the battery cell main body comprises a positive pole piece and a negative pole piece, and the pole lug part comprises a positive pole lug and a negative pole lug. The opposite ends of electric core are provided with two utmost point ears respectively, and the battery can also include two utmost point post subassemblies, and two utmost point ears can be connected with two utmost point post subassemblies respectively. Alternatively, the cell may also include a pole assembly, and one of the two pole tabs may be connected to the pole assembly and the other may be connected to one of the first and second housing pieces 10, 20.

In one embodiment, the battery may be a prismatic battery.

The battery can be the lamination formula battery, and it is convenient not only to organize, and can process and obtain the longer battery of length. Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.

Or, the battery may be a winding battery, that is, a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a winding battery core.

In one embodiment, the battery may be a cylindrical battery. The battery may be a winding battery, that is, a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm piece disposed between the first pole piece and the second pole piece are wound to obtain a winding battery cell.

An embodiment of the utility model also provides a group battery, including foretell battery.

The battery pack according to an embodiment of the present invention includes a battery including a first housing member 10, a second housing member 20, and a metal coating 30, and the metal coating 30 is connected between the first housing member 10 and the second housing member 20. The metal coating 30 is welded with the first shell piece 10 and the second shell piece 20, so that the connection stability of the first shell piece 10 and the second shell piece 20 is ensured, the melting point of the first shell piece 10 and the melting point of the second shell piece 20 are larger than that of the metal coating 30, the melting of the metal coating 30 can be facilitated, the metal coating 30 is ensured to be reliably welded with the first shell piece 10 and the second shell piece 20, and the corrosion rate of the metal coating 30 is smaller than that of the first shell piece 10 and the second shell piece 20, so that the corrosion protection at the connecting position of the first shell piece 10 and the second shell piece 20 is realized, the corrosion risk of the first shell piece 10 and the second shell piece 20 is reduced, and the safe use performance of the battery pack is improved.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixing a plurality of batteries. The battery can be a cylindrical battery, and the battery module can further comprise a bracket, and the battery can be fixed on the bracket.

The battery pack includes a plurality of batteries and a case for fixing the plurality of batteries.

It should be noted that the battery pack includes a plurality of batteries, and the plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module. Or, a plurality of batteries can directly set up in the box, need not to carry out the group to a plurality of batteries promptly, utilizes the box to fix a plurality of batteries.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery, comprising:

a first housing piece (10);

a second housing part (20);

a metal coating (30), the metal coating (30) being located between the first and second housing pieces (10, 20) and being welded to the first and second housing pieces (10, 20), respectively;

wherein the melting point of the metal coating (30) is lower than the melting point of the first housing part (10), the melting point of the metal coating (30) is lower than the melting point of the second housing part (20), and the corrosion rate of the metal coating (30) is lower than the first and second housing parts (10, 20).

2. The cell of claim 1, wherein the metal coating (30) has a melting point of 150 ℃ to 800 ℃.

3. The battery according to claim 1, characterized in that the thickness of the metal coating (30) is 1-500 μ ι η.

4. A battery according to any of claims 1 to 3, characterized in that the metal coating (30) is solder paste.

5. A battery according to any of claims 1 to 3, characterized in that the first housing piece (10) comprises steel and the second housing piece (20) comprises steel.

6. The battery according to claim 5, wherein the first housing member (10) is a cover plate.

7. A battery according to any of claims 1 to 3, characterized in that the first housing piece (10) is provided with a mounting groove (11) thereon, at least part of the metal coating (30) being located within the mounting groove (11) for welding with the first and second housing pieces (10, 20).

8. The battery according to claim 7, wherein the mounting groove (11) includes a bottom wall (111) and a side wall (112), the side wall (112) being disposed around one end of the bottom wall (111), the other end of the bottom wall (111) intersecting with a circumferential outer surface of the first case member (10);

wherein the metal coating (30) covers at least part of the bottom wall (111) and/or the metal coating (30) covers at least part of the side wall (112).

9. The battery according to claim 8, wherein a portion of the second housing member (20) is located within the mounting groove (11).

10. The battery according to any one of claims 1 to 3, wherein the battery is a cylindrical battery.

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