CN220382142U - Battery and device having the same - Google Patents

Abstract

Embodiments of the present utility model provide a battery and a device having the same. The battery comprises a shell, a first pole, a second pole, an isolating film, a positive plate and a negative plate. The first pole and the second pole are arranged on the inner wall surface of the shell at intervals along the circumferential direction of the shell; the negative electrode plate, the isolation film and the positive electrode plate are alternately stacked in the height direction of the shell, the positive electrode plate is abutted to the first electrode post, and the negative electrode plate is abutted to the second electrode post. Therefore, the battery according to the embodiment of the utility model has advantages of high convenience in processing and high energy density.

Description

Battery and device having the same

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery and equipment with the battery.

Background

Along with the advantages of environmental protection, economy, convenience in traveling and the like, the electric automobile is favored by more and more users, but the cruising ability of the electric automobile is also prohibitive for a large number of users. Therefore, energy density is a very important parameter in developing power cells.

In the field of power lithium batteries, the pole piece process can better exert the advantages of a large-scale battery cell, the safety, the energy density and the process control of the pole piece process are superior to those of a winding process, and meanwhile, the pole piece process can better control the yield of the battery cell. However, the conventional battery is easy to cause the limitation of the energy density of the battery due to the unreasonable structural design of the battery core.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, an embodiment of the present utility model proposes a battery. The battery has the advantages of high processing convenience and high energy density.

The embodiment of the utility model also provides equipment with the battery. The equipment has the advantages of high processing convenience and high energy density.

The battery provided by the embodiment of the utility model comprises a shell, a first pole, a second pole, an isolating film, a positive plate and a negative plate.

The first pole and the second pole are arranged on the inner wall surface of the shell at intervals along the circumferential direction of the shell; the negative electrode plate, the isolation film and the positive electrode plate are alternately stacked in the height direction of the shell, the positive electrode plate is abutted to the first electrode post, and the negative electrode plate is abutted to the second electrode post. It is understood that a part of the positive electrode tab is in contact with the first electrode post as a tab thereof, and a part of the negative electrode tab is in contact with the second electrode post as a negative electrode tab thereof.

According to the battery provided by the embodiment of the utility model, the first pole post and the second pole post which extend along the stacking direction of the pole pieces are arranged, the positive pole piece is abutted with the first pole post, and the negative pole piece is abutted with the second pole post, so that the pole lugs corresponding to the pole pieces can be reduced. Therefore, the method has the advantage of high processing convenience.

In addition, the positive plate and the negative plate are directly connected with the corresponding polar posts, so that the space inside the shell of the battery core can be greatly saved, and the energy density of the battery can be effectively improved.

Therefore, the battery provided by the embodiment of the utility model has the advantages of high processing convenience and high energy density.

In some embodiments, the separator, the positive electrode sheet, and the negative electrode sheet each have a plurality, and a plurality of the separator, a plurality of the positive electrode sheets, and a plurality of the negative electrode sheets are alternately stacked in the height direction of the case.

In some embodiments, each positive electrode tab includes a positive electrode tab body and a first protrusion disposed at an edge of the positive electrode tab body, the first electrode post extends in a height direction of the housing, and a plurality of the first protrusions are electrically connected with the first electrode post.

In some embodiments, each of the negative electrode tabs includes a negative electrode tab body and a second protrusion disposed at an edge of the negative electrode tab body, the second posts extending in a height direction of the case, the plurality of second protrusions being electrically connected with the second posts.

In some embodiments, the isolation diaphragm includes an isolation diaphragm body, a first isolation portion and a second isolation portion, the first isolation portion and the second isolation portion being disposed at edges of the isolation diaphragm body, the first isolation portion and the second isolation portion being disposed in correspondence with the first protrusion and the second protrusion.

In some embodiments, the first protrusion is integrally formed with the positive plate body.

In some embodiments, the second protrusion is integrally formed with the negative plate body.

In some embodiments, the positive electrode sheet has a first liquid-permeable hole, and the negative electrode sheet has a second liquid-permeable hole, the first liquid-permeable hole and the second liquid-permeable hole being disposed opposite to each other in a height direction of the case.

In some embodiments, the housing includes a housing body and a cover plate assembly, the cover plate assembly is covered on the housing body, a first accommodating groove and a second accommodating groove are formed on an inner wall surface of the housing body, and the first pole and the second pole are correspondingly arranged in the first accommodating groove and the second accommodating groove.

In some embodiments, the housing body is a rubber housing or a plastic housing, and the first pole is injection molded onto the housing body.

In some embodiments, the housing body is a rubber housing or a plastic housing, and the second post is injection molded onto the housing body.

In some embodiments, the first pole is protruded relative to the bottom of the first accommodating groove so as to form a first limiting protrusion, the positive plate is provided with a positive limiting groove, and the first limiting protrusion is matched in the positive limiting groove.

In some embodiments, the second pole protrudes relative to the bottom of the second accommodating groove so as to form a second limiting protrusion, and the negative plate has a negative limiting groove, and the second limiting protrusion is matched in the negative limiting groove.

In some embodiments, the cover assembly includes a plastic cover, a cell electrode injection molded onto the plastic cover, and an over-current member connected to the cell electrode.

In some embodiments, the flow-through piece includes flow-through piece and elastic component, the both ends of elastic component butt in the flow-through piece with the apron subassembly one-to-one.

In some embodiments, the housing body is rectangular or cylindrical.

The device with a battery according to an embodiment of the present utility model may include the battery according to any one of the above embodiments.

Drawings

Fig. 1 is a schematic view of the structure of a battery according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a partial structure of a battery according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of a positive electrode sheet, a separator, and a negative electrode sheet according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of a cover plate assembly according to an embodiment of the present utility model.

Reference numerals:

a housing 1; a case body 11; a first accommodation groove 111; a second accommodation groove 112;

a cover plate assembly 12;

a cover plate assembly 121; a cell electrode 122; an overflow 123; an overflow tab 1231; an elastic member 1232;

a first pole 2;

a second pole 3;

a positive electrode sheet 4;

a positive electrode sheet body 41; a first liquid-permeable hole 411; a first convex portion 42; positive limit groove 421;

a negative electrode sheet 5;

a negative electrode sheet body 51; a second liquid-permeable hole 511; a second convex portion 52; a negative electrode limiting groove 521;

a separator 6; a separator body 61; a first isolation portion 62; the second isolation portion 63.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A battery according to an embodiment of the present utility model is described below with reference to fig. 1 to 4.

The battery of the embodiment of the utility model comprises a shell 1, a first pole 2, a second pole 3, a separation film 6, a positive plate 4 and a negative plate 5.

The first pole 2 and the second pole 3 are provided on the inner wall surface of the housing 1 at intervals in the circumferential direction of the housing 1; the negative electrode sheet 5, the separator 6, and the positive electrode sheet 4 are alternately stacked in the height direction of the case 1 (vertical direction shown in fig. 1), the positive electrode sheet 4 is in contact with the first electrode post 2, and the negative electrode sheet 5 is in contact with the second electrode post 3. It can be understood that a part of the positive electrode tab 4 abuts against the first post 2 as a tab thereof, and a part of the negative electrode tab 5 abuts against the second post 3 as a negative tab thereof.

According to the battery provided by the embodiment of the utility model, the first pole post 2 and the second pole post 3 which extend along the stacking direction of the pole pieces (the height direction of the shell 1) are arranged, the positive pole piece 4 is abutted against the first pole post 2, and the negative pole piece 5 is abutted against the second pole post 3, so that the pole lugs corresponding to the pole pieces can be reduced. Therefore, the method has the advantage of high processing convenience. Meanwhile, compared with a winding electric core, the battery provided by the embodiment of the utility model can realize single-side electrode outlet or double-side electrode outlet. Has the advantage of high assembly convenience.

In addition, the positive plate 4 and the negative plate 5 are directly connected with the corresponding polar posts, so that the space inside the shell 1 of the battery core can be greatly saved, and the energy density of the battery can be effectively improved.

Therefore, the battery provided by the embodiment of the utility model has the advantages of high processing convenience and high energy density.

The utility model does not limit the specific shape of the housing 1 and the specific stacking number of pole pieces, and can be set by a person skilled in the art according to the actual use situation.

The separator 6, the positive electrode sheet 4, and the negative electrode sheet 5 are each plural, and the plural separator 6, the plural positive electrode sheet 4, and the plural negative electrode sheet are alternately laminated in the height direction of the case 1.

The battery of the embodiment of the utility model has a plurality of separator 6, positive electrode sheet 4 and negative electrode sheet 5. Thereby, the capacity of the battery is improved.

Further, the separator 6 may be provided on both sides of the cell stack formed by the separator 6, the positive electrode sheet 4, and the negative electrode sheet 5. Therefore, the insulation between the battery cell and the shell is further improved.

Specifically, the battery core of the battery comprises a first isolating film, a first positive plate, a second isolating film, a first negative plate, a third isolating film, a second positive plate, a fourth isolating film, a second negative plate, a fourth isolating film, a third positive plate, a fifth isolating film, a third negative plate … … Nth positive plate, a 2N isolating film, an Nth negative plate and a 2N+1 th isolating film. The battery cells are sequentially arranged in a mode of a first isolating film, a first positive plate, a second isolating film, a first negative plate, a third isolating film, a second positive plate, a fourth isolating film, a second negative plate, a fourth isolating film, a third positive plate, a fifth isolating film, a third negative plate … … Nth positive plate, a 2N isolating film, an Nth negative plate and a 2N+1th isolating film.

For example, when N is equal to 1, the first separator, the first positive electrode sheet, the second separator, the first negative electrode sheet, and the third separator are sequentially arranged.

As shown in fig. 1 to 3, each positive electrode tab 4 includes a positive electrode tab body 41 and first protrusions 42 provided at the edge of the positive electrode tab body 41, and the plurality of first protrusions 42 are electrically connected to the first electrode post 2. It is understood that the first convex portion 42 may protrude toward the outside along the edge of the positive electrode tab body 41.

In the battery of the embodiment of the utility model, each positive electrode tab 4 includes the positive electrode tab body 41 and the first protruding portions 42 provided at the edge of the positive electrode tab body 41, and the plurality of first protruding portions 42 are electrically connected to the first electrode post 2. Thus, the energy density of the positive electrode sheet 4 can be increased by providing the first convex portion 42, and there is an advantage in that the battery capacity can be increased.

As shown in fig. 1 to 3, each negative electrode tab 5 includes a negative electrode tab body 51 and second protrusions 52 provided at the edges of the negative electrode tab body 51, and the plurality of second protrusions 52 are each electrically connected to the second electrode post 3. This has the advantage of further improving the battery capacity.

As shown in fig. 1 to 3, the first convex portion 42 is integrally formed with the positive electrode sheet body 41; and/or, the second convex portion 52 is integrally formed with the negative electrode sheet body 51. Therefore, the method has the advantages of convenience in processing and good structural stability.

During specific processing, when the positive electrode sheet 4 or the negative electrode sheet 5 is cut by laser, a part of the edge of the positive electrode sheet body 41 or the edge of the negative electrode sheet body 51 can be reserved in a reserved mode, namely, the positive electrode sheet and the negative electrode sheet are cut into lugs by laser. Thereby the pole piece and the pole lug part are integrally formed. Therefore, the efficiency of battery installation and processing is greatly improved.

As shown in fig. 1 to 3, the separator 6 includes a separator body 61, a first separator 62 and a second separator 63, the first separator 62 and the second separator 63 being provided at edges of the separator body 61, the first separator 62 and the second separator 63 being provided corresponding to the first convex portion 42 and the second convex portion 52.

According to the battery provided by the embodiment of the utility model, the first isolation part and the second isolation part are arranged, so that the adjacent pole pieces are not communicated. So as to effectively avoid the problem of short circuit when a plurality of batteries are used simultaneously, thereby further improving the reliability of the batteries. Of course, the utility model does not limit the specific structure and material of the isolation film, and the person skilled in the art can set the isolation film according to the actual use requirement, so long as the isolation film has an insulation effect.

Specifically, the first partition is provided corresponding to the first convex portion 42; the second separator is provided corresponding to the second convex portion 52, and the separator body 61, the positive electrode sheet body 41, and the negative electrode sheet body 51 are equivalent in shape and size.

As shown in fig. 1, 2 and 4, the positive electrode sheet 4 has a first liquid-permeable hole 411, and the negative electrode sheet 5 has a second liquid-permeable hole 511, the first liquid-permeable hole 411 and the second liquid-permeable hole 511 being disposed opposite to each other in the height direction of the case 1. The electrolyte can infiltrate the whole cell through the arranged liquid-permeable holes, and the normal conducting performance can be ensured.

As shown in fig. 1, 2 and 4, the housing 1 includes a housing body 11 and a cover plate assembly 12, the cover plate assembly 12 is arranged on the housing body 11 in a covering manner, a first accommodating groove 111 and a second accommodating groove 112 are formed on the inner wall surface of the housing body 11, and the first pole 2 and the second pole 3 are correspondingly arranged in the first accommodating groove 111 and the second accommodating groove 112. It can be understood that the first accommodating groove 111 and the second accommodating groove 112 are both disposed along the stacking direction of the pole pieces.

In the battery of the embodiment of the utility model, the housing 1 comprises the housing body 11 and the cover plate assembly 12, and the first pole 2 and the second pole 3 are correspondingly arranged in the first accommodating groove 111 and the second accommodating groove 112 of the housing body 11. Thereby, the second pole 3 is prevented from occupying too much space in the case body 11, and thus, there is an advantage in that the capacity of the battery is further improved.

As shown in fig. 1, 2 and 4, the housing body 11 is a rubber housing 1 or a plastic housing 1, and the first pole 2 is injection-molded on the housing body 11; and/or the second pole 3 is injection-molded on the housing body 11. It will be appreciated that the first pole 2 is injection moulded onto the housing body 11; either the second pole 3 is injection molded onto the housing body 11 or the first pole 2 is injection molded onto the housing body 11 and the second pole 3 is injection molded onto the housing body 11. Thereby, the stability of the first pole 2 and the second pole 3 in cooperation with the case body 11 and the convenience of processing are improved.

As shown in fig. 1, 2 and 4, the first pole 2 protrudes relative to the bottom of the first accommodating groove 111 so as to form a first limiting protrusion, and the positive plate 4 has a positive limiting groove 421, and the first limiting protrusion is fitted in the positive limiting groove 421.

According to the battery provided by the embodiment of the utility model, the first limit protrusion formed by the protrusion of the first pole column 2 relative to the bottom of the first accommodating groove 111 is matched with the positive limit groove 421 of the positive plate 4, so that the pole piece can be prevented from rotating along the circumferential direction of the pole piece. Therefore, the structure stability is improved.

Similarly, the second pole 3 protrudes relative to the bottom of the second accommodating groove 112 so as to form a second limiting protrusion, and the negative plate 5 has a negative limiting groove 521, and the second limiting protrusion is matched in the negative limiting groove 521. Therefore, the structure stability is further improved.

Specifically, the first limiting protrusion is clamped in the positive limiting groove 421, and the second limiting protrusion is clamped in the negative limiting groove 521. The positive limit groove 421 is provided on the first convex portion 42, and the negative limit groove 521 is provided on the second convex portion 52; the positive electrode limit groove 421 and the negative electrode limit groove 521 can be obtained by shearing.

For example, the housing body 11 may be injection molded of PPR insulating material. The first pole 2 and the second pole 3 are both cylinders. A part of the first and second poles 2 and 3 is injection-molded in the case body 11, and a part of the first and second poles 2 and 3 is exposed to the inner wall surface of the case body 11 so as to be in contact with the positive electrode tab 4 and the negative electrode tab 5.

As shown in fig. 1, 2 and 4, the cover assembly 12 includes a plastic cover, a battery cell electrode 122 and an overcurrent element 123, the battery cell electrode 122 is injection molded on the plastic cover, and the overcurrent element 123 is connected with the battery cell electrode 122.

The battery of the embodiment of the utility model has the advantages of good structural integrity and high processing convenience by injection molding the battery core electrode 122 on the plastic cover plate.

As shown in fig. 4, the flow-through member 123 includes a flow-through plate 1231 and an elastic member 1232, and two ends of the elastic member 1232 are abutted against the flow-through plate 1231 and the cover assembly 121 in a one-to-one correspondence.

According to the battery provided by the embodiment of the utility model, the pole piece of the cylindrical battery core is in overcurrent communication through the arranged elastic piece 1232 pressing the overcurrent piece 1231, so that the purpose of overcurrent of the battery core is achieved. In addition, after the formed battery cell is electrified and expanded, the elastic piece 1232 can play a role in buffering to a certain extent so as to prevent the problem that the extrusion force of the pole piece to the plastic cover plate is overlarge.

Alternatively, the elastic member 1232 may be a spring pressing device.

As shown in fig. 1 to 4, the case body 11 may be a cylindrical case. Specifically, the shell 1 is a cylindrical shell 1, and the corresponding pole piece is a circular pole piece.

The case body 11 of the battery of the embodiment of the utility model is not limited thereto, and in other embodiments, the case body 11 is a rectangular case 1.

The device with a battery according to an embodiment of the present utility model includes the battery in any one of the above embodiments.

The device with the battery has the advantages of high processing convenience and high energy density.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A battery, comprising:

a housing, a first pole and a second pole, the first pole and the second pole being disposed on an inner wall surface of the housing at intervals along a circumferential direction of the housing;

the separator, positive plate and negative plate, the negative plate the separator with the positive plate is in the direction of height of casing is in the range upon range of setting in turn, the positive plate with first utmost point post butt, the negative plate with the second utmost point post butt.

2. The battery according to claim 1, wherein the separator, the positive electrode sheet, and the negative electrode sheet each have a plurality, and a plurality of the positive electrode sheets, a plurality of the separator, and a plurality of the negative electrode sheets are alternately stacked in a height direction of the case.

3. The battery according to claim 1, wherein each of the positive electrode tabs includes a positive electrode tab body and first protrusions provided at edges of the positive electrode tab body, the first posts extending in a height direction of the case, the first protrusions being electrically connected to the first posts;

and/or, each negative plate comprises a negative plate body and second convex parts arranged at the edge of the negative plate body, the second posts extend along the height direction of the shell, and a plurality of the second convex parts are electrically connected with the second posts;

and/or, the isolation diaphragm comprises an isolation diaphragm body, a first isolation part and a second isolation part, wherein the first isolation part and the second isolation part are arranged at the edge of the isolation diaphragm body, and the first isolation part and the second isolation part are correspondingly arranged with the first convex part and the second convex part.

4. The battery of claim 3, wherein the first protrusion is integrally formed with the positive plate body; the second convex part and the negative plate body are integrally formed.

5. The battery according to claim 1, wherein the positive electrode sheet has a first liquid-permeable hole, and the negative electrode sheet has a second liquid-permeable hole, the first liquid-permeable hole and the second liquid-permeable hole being disposed opposite to each other in a height direction of the case.

6. The battery according to claim 1, wherein the case includes a case body and a cover plate assembly, the cover plate assembly is provided on the case body, a first receiving groove and a second receiving groove are provided on an inner wall surface of the case body, and the first pole and the second pole are provided in the first receiving groove and the second receiving groove, respectively.

7. The battery of claim 6, wherein the housing body is a rubber housing or a plastic housing, and the first post is injection molded onto the housing body;

and/or the second pole is injection molded on the shell body;

and/or the first pole is protruded relative to the bottom of the first accommodating groove so as to form a first limiting protrusion, the positive plate is provided with a positive limiting groove, and the first limiting protrusion is matched in the positive limiting groove;

and/or the second pole is protruded relative to the bottom of the second accommodating groove so as to form a second limiting protrusion, the negative plate is provided with a negative limiting groove, and the second limiting protrusion is matched in the negative limiting groove.

8. The battery of claim 6, wherein the cover assembly comprises a plastic cover, a cell electrode and an overcurrent element, the cell electrode is injection molded on the plastic cover, and the overcurrent element is connected with the cell electrode;

and/or the shell body is a rectangular shell or a cylindrical shell.

9. The battery of claim 8, wherein the overcurrent element comprises an overcurrent piece and an elastic element, and two ends of the elastic element are abutted against the overcurrent piece and the cover plate assembly in a one-to-one correspondence manner.

10. A device with a battery, characterized by comprising a battery according to any of claims 1-9.