CN217691264U

CN217691264U - Battery cell structure, power battery and electric vehicle

Info

Publication number: CN217691264U
Application number: CN202221748340.9U
Authority: CN
Inventors: 阮祖云; 曾勇; 李德壮; 李树辉; 华超; 邓善庆
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-10-28
Anticipated expiration: 2032-07-07

Abstract

The application relates to a battery cell structure, a power battery and an electric vehicle, wherein the battery cell structure comprises: roll cylinder, utmost point book, wherein, roll cylinder includes plane wall body and chamfer wall body, plane wall body is connected with chamfer wall body, utmost point book is around plane wall body and chamfer wall body are rolled. The pole roll winding device can avoid pole rolls from being broken due to excessive bending in the winding process, further avoid the problem of powder falling due to breaking, and particularly can reduce the probability that the innermost ring of the pole rolls breaks and falls powder.

Description

Battery cell structure, power battery and electric vehicle

Technical Field

The application relates to a power battery, in particular to an electric core structure, a power battery and an electric vehicle.

Background

At present, along with the increase of energy density of a battery, the thicker the battery core is, the more difficult the heat in the battery core is to be dissipated, so that the service life and the safety are affected. On the other hand, the innermost pole coil of the wound battery core may break off the powder, which may cause a safety problem.

SUMMERY OF THE UTILITY MODEL

The application aims to provide an electric core structure, a power battery and an electric vehicle, wherein the electric core structure, the power battery and the electric vehicle have the advantage that an electrode coil of the electric core structure is not easy to break off and fall off.

In order to achieve the above object, in a first aspect, the present invention provides an electric core structure, the electric core structure includes: roll cylinder, utmost point book, wherein, roll cylinder includes plane wall body and chamfer wall body, plane wall body is connected with chamfer wall body, utmost point book is around plane wall body with chamfer wall body winds.

In this application first aspect, because it includes plane wall body and chamfer wall body to roll up the syringe, consequently, the pole is rolled up and can is rolled up around the plane wall body and the chamfer wall body of rolling up the syringe, so, because the pole is rolled up at the coiling in-process, in proper order through chamfer wall body and plane wall body, wherein, when passing through the plane wall body, the pole is rolled up and is not taken place the tortuous, and when passing through the chamfer wall body, the chamfer that the chamfer wall body has the radian can make the pole roll too tortuous, finally through the plane wall body and the chamfer wall body of rolling up the syringe, can avoid the pole to roll up excessively tortuous and take place the rupture in the coiling in-process, and then can avoid falling the problem of powder because of the rupture, especially can reduce the probability that the powder falls in the inner circle of pole takes place the rupture.

In an optional embodiment, the cell structure further includes two tabs, wherein the pole roll forms an upper step surface by winding the planar wall body and the chamfered wall body, and the two tabs are fixed on the upper step surface and electrically connected to the pole roll;

and the two lugs are symmetrically arranged on the left side and the right side of the needle coiling cylinder.

In this optional embodiment, the pole roll may form an upper step surface by winding the planar wall body and the chamfered wall, so that two tabs may be fixed to the upper step surface and electrically connected to the pole roll.

In an optional embodiment, the cell structure further includes a cover plate, and the cover plate is mounted on the upper step surface;

and the cover plate comprises two polar columns, wherein the two polar columns are symmetrically arranged on the left side and the right side of the cover plate, and the two polar columns are connected with the two polar lugs.

In this optional embodiment, the cover plate is mounted on the upper step surface, so that the cover plate can protect the upper step surface, and further protect the pole roll, and further reduce the probability of damage to the pole roll. Meanwhile, two pole lugs can be connected through two pole columns on the cover plate, so that when the cover plate is used for protecting the pole roll, the pole lugs can be ensured to be electrically connected with external equipment through the pole columns.

In an optional embodiment, the pole and the tab are connected by laser welding or ultrasonic welding.

In the optional embodiment, the pole and the pole lug are connected by adopting a laser welding mode or an ultrasonic welding mode, and the pole lug welding machine has the advantages of high welding speed, high accuracy, good sealing performance after welding and the like.

In an alternative embodiment, the cover plate comprises a through hole with the same shape as the nozzle of the roll needle cylinder, and the nozzle of the roll needle cylinder extends to the through hole and is connected with the cover plate.

In this alternative embodiment, the cover plate includes a through hole having the same shape as the nozzle of the roll cylinder, so that the nozzle of the roll cylinder can extend to the through hole and be connected with the cover plate, thereby enabling the roll cylinder to be fixedly connected.

In an alternative embodiment, the nozzle of the winding cylinder and the cover plate are connected and sealed by laser welding.

In this optional embodiment, the nozzle of the winding cylinder and the cover plate are welded by laser, so that the nozzle of the winding cylinder and the cover plate can be fixedly connected, and meanwhile, the tightness between the laser welding and the cover plate can be ensured.

In an optional embodiment, the cell structure further includes a housing, the housing includes a mounting cavity, and the pole roll is mounted in the mounting cavity, wherein the cover plate is connected to the top of the housing, and the bottom of the housing is connected to the winding needle cylinder.

In this alternative embodiment, since the housing includes the mounting cavity, the pole roll can be mounted in the mounting cavity such that the cover plate is connected to the top of the housing and the bottom of the housing is connected to the winding cylinder.

In an alternative embodiment, the bottom of the housing is glued to the needle roller by means of a thermally conductive glue.

In this alternative embodiment, since the bottom of the housing is adhered to the needle winding drum by the heat conductive adhesive, when the heat emitted from the pole winding is transferred to the needle winding drum, most of the heat on the needle winding drum can be transferred to the housing by the heat conductive adhesive, so that the heat can be emitted to the outside through the housing.

In a second aspect, the present invention provides a power battery, the power battery includes a water-cooling plate and an electric core structure as in any one of the foregoing embodiments, wherein the casing of the electric core structure offsets with the water-cooling plate.

In this application second aspect, because power battery includes the electric core structure of first aspect, consequently all advantages that its utensil had by the electric core structure, in addition, because the casing of electric core structure with the water cooling board offsets, so, when utilizing the heat-conducting glue with the most heat transfer to the casing on the book needle section of thick bamboo, the casing can further with heat transfer to the water cooling board to utilize the water cooling board to improve the radiating effect.

In a third aspect, the present invention provides an electric vehicle, which includes the power battery according to the foregoing embodiments.

In the third aspect of the present application, since the electric vehicle has the power battery of the second aspect of the present application, it has all the advantages that the power battery has.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a cell structure provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of another electrical core structure provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another cell structure provided in an embodiment of the present application;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a cross-sectional view taken at A in FIG. 3;

fig. 6 is a schematic structural diagram of a roll cylinder according to an embodiment of the present application.

An icon: 1-rolling the needle cylinder; 2-pole ear; 3-pole winding; 4-cover plate; 5-pole column; 6-a shell; 101-planar wall; 102-chamfering the wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Please refer to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6. As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the cell structure of the embodiment of the present application includes: winding cylinder 1, pole winding 3, wherein, winding cylinder 1 includes planar wall 101 and chamfer wall 102, planar wall 101 is connected with chamfer wall 102, pole winding 3 winds around planar wall 101 and chamfer wall 102.

In the embodiment of the present application, since the winding cylinder 1 includes the planar wall 101 and the chamfered wall 102, the polar coil 3 can be wound around the planar wall 101 and the chamfered wall 102 of the winding cylinder 1, and thus, since the polar coil 3 sequentially passes through the chamfered wall 102 and the planar wall 101 during the winding process, when passing through the planar wall 101, the polar coil 3 does not bend, and when passing through the chamfered wall 102, the chamfered wall 102 having a radian and the chamfered wall 102 can make the polar coil 3 too bend, and finally the planar wall 101 and the chamfered wall 102 of the winding cylinder 1 can prevent the polar coil 3 from bending too much and breaking during the winding process, thereby avoiding the problem of powder falling due to breaking, and in particular, reducing the probability of powder falling due to breaking of the innermost ring of the polar coil 3.

In an optional embodiment, the cell structure further includes two tabs 2, wherein the pole roll 3 forms an upper step surface by winding the planar wall 101 and the chamfered wall 102, and the two tabs 2 are fixed on the upper step surface and electrically connected to the pole roll 3;

and the two tabs 2 are symmetrically arranged at the left side and the right side of the needle winding cylinder 1.

In this alternative embodiment, the pole roll 3 may form an upper step surface by winding the planar wall 101 and the chamfered wall, so that the two tabs 2 may be fixed to the upper step surface and electrically connected to the pole roll 3.

In an optional embodiment, the battery cell structure further includes a cover plate 4, and the cover plate 4 is mounted on the upper step surface;

and, the apron 4 includes two utmost point posts 5, and wherein, two utmost point posts 5 symmetry set up the left and right sides at apron 4 to two utmost point posts 5 are connected with two utmost point ears 2.

In the optional embodiment, the cover plate 4 is mounted on the upper step surface, so that the cover plate 4 can be used to protect the upper step surface, and further protect the pole roll 3, and further reduce the probability of damage to the pole roll 3. Meanwhile, two pole posts 5 on the cover plate 4 can be connected with two pole lugs 2, so that the cover plate 4 is utilized to protect the pole roll 3, and the pole lugs 2 can be ensured to be electrically connected with external equipment through the pole posts 5.

In an alternative embodiment, the pole 5 and the tab 2 are connected by laser welding or ultrasonic welding.

In the optional embodiment, the pole 5 is connected with the pole lug 2 by adopting a laser welding mode or an ultrasonic welding mode, so that the method has the advantages of high welding speed, high accuracy, good sealing performance after welding and the like.

In an alternative embodiment, the cover plate 4 comprises a through hole with the same shape as the nozzle of the needle winding cylinder 1, and the nozzle of the needle winding cylinder 1 extends to the through hole and is connected with the cover plate 4.

In this alternative embodiment, the cover plate 4 comprises a through hole with the same shape as the nozzle of the winding cylinder 1, so that the nozzle of the winding cylinder 1 can extend to the through hole and be connected with the cover plate 4, thereby enabling the winding cylinder 1 to be fixedly connected.

In an alternative embodiment, the mouth of the needle winding cylinder 1 and the cover plate 4 are connected and sealed by laser welding.

In this alternative embodiment, the nozzle of the roll cylinder 1 and the cover plate 4 are welded by laser, so that the nozzle of the roll cylinder 1 and the cover plate 4 are fixedly connected, and the sealing performance between the laser welding and the cover plate 4 is ensured.

In an alternative embodiment, the cell structure further includes a housing 6, the housing 6 includes a mounting cavity, the pole roll 3 is mounted in the mounting cavity, wherein the cover plate 4 is connected to the top of the housing 6, and the bottom of the housing 6 is connected to the roll cylinder 1.

In this alternative embodiment, since the housing 6 includes a mounting cavity, and the pole winding 3 can be mounted in the mounting cavity, the cover plate 4 is connected to the top of the housing 6, and the bottom of the housing 6 is connected to the winding cylinder 1.

In an alternative embodiment, the bottom of the housing 6 is glued to the winding cylinder 1 by means of a thermally conductive glue.

In this alternative embodiment, since the bottom of the housing 6 is adhered to the winding cylinder 1 by the heat conductive adhesive, when the heat emitted from the pole winding 3 is transferred to the winding cylinder 1, most of the heat on the winding cylinder 1 can be transferred to the housing 6 by the heat conductive adhesive, so that the heat can be emitted to the outside through the housing 6.

In addition, the embodiment of the present application provides a power battery, where the power battery includes a water-cooling plate and the cell structure according to any one of the foregoing embodiments, where the shell 6 of the cell structure abuts against the water-cooling plate.

In the embodiment of the present application, since the power battery includes the electrical core structure of the first aspect, it has all advantages of the electrical core structure, and in addition, since the casing 6 of the electrical core structure abuts against the water-cooling plate, when most of the heat on the winding cylinder 1 is transferred to the casing 6 by using the heat-conducting glue, the casing 6 can further transfer the heat to the water-cooling plate, so as to improve the heat dissipation effect by using the water-cooling plate.

The water cooling plate provided by the embodiment of the application has the water cooling loop, and the heat can be transferred to the outside through the liquid circulation in the water cooling loop, so that the heat dissipation effect is improved by utilizing the water cooling plate.

In addition, the embodiment of the application provides an electric vehicle, and the electric vehicle comprises the power battery of the previous embodiment.

In the embodiment of the present application, since the electric vehicle has the power battery of the embodiment of the present application, it has all the advantages that the power battery has.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cell structure, comprising: roll cylinder, utmost point book, wherein, roll cylinder includes plane wall body and chamfer wall body, plane wall body is connected with chamfer wall body, utmost point book is around plane wall body with chamfer wall body winds.

2. The cell structure of claim 1, further comprising two tabs, wherein the coil forms an upper step surface by winding the planar wall and the chamfered wall, and the two tabs are fixed to the upper step surface and electrically connected to the coil;

3. The cell structure of claim 2, further comprising a cover plate mounted to the upper step surface;

4. The cell structure of claim 3, wherein the terminal post and the tab are connected by laser welding or ultrasonic welding.

5. The cell structure of claim 3, wherein the cover plate comprises a through hole having a shape identical to that of a nozzle of the winding cylinder, and the nozzle of the winding cylinder extends to the through hole and is connected with the cover plate.

6. The cell structure of claim 5, wherein the mouth of the winding cylinder and the cover plate are connected and sealed by laser welding.

7. The cell structure of claim 5, further comprising a housing comprising a mounting cavity in which the pole coil is mounted, wherein the cover plate is coupled to a top of the housing and a bottom of the housing is coupled to the winding pin drum.

8. The cell structure of claim 7, wherein the bottom of the casing is bonded to the syringe barrel with a thermally conductive adhesive.

9. A power battery, characterized in that the power battery comprises a water-cooling plate and the cell structure of any one of claims 1 to 8, wherein the casing of the cell structure abuts against the water-cooling plate.

10. An electric vehicle characterized by comprising the power battery according to claim 9.