CN219163524U - Battery cell shell and battery cell - Google Patents

Abstract

The utility model relates to a battery cell shell and a battery cell, wherein the battery cell shell comprises a battery cell shell body, an upper reinforcing part and a lower reinforcing part; the battery cell shell body is hollow, a battery cell electrode group accommodating cavity is formed in the battery cell shell body, an upper accommodating groove is formed in the top of the battery cell shell body, and a lower accommodating groove is formed in the bottom of the battery cell shell body; the upper reinforcing part is arranged in the upper accommodating groove; the lower reinforcement part is arranged in the lower accommodating groove. The upper reinforcing part is embedded in the upper accommodating groove, and the lower reinforcing part is embedded in the lower accommodating groove, so that the occupation of the outer space of the battery cell shell body and the space in the accommodating cavity of the battery cell pole group is reduced, the whole size of the battery cell shell is not greatly changed, and the energy density in unit volume is improved. Meanwhile, the strength of the battery cell shell body is effectively improved, and the deformation resistance of the battery cell shell is improved. The smoothness of ventilation in the accommodating cavity of the battery cell electrode group is maintained, the appearance of the battery cell shell is kept smooth, and the battery cell assembly is facilitated.

Description

Battery cell shell and battery cell

Technical Field

The utility model relates to the technical field of battery cells, in particular to a battery cell shell and a battery cell.

Background

With the increasing maturity of lithium ion battery technology, blade battery as novel power battery is widely applied to electric automobile, and blade battery performance and security requirement are rising increasingly. The blade battery comprises a plurality of battery cells which are stacked in sequence, and each battery cell comprises a battery cell shell, a battery cell pole group and an end cover. The battery cell electrode group is arranged in the battery cell shell. One end of the battery cell shell is of an opening structure so as to facilitate the assembly of the battery cell pole into the battery cell shell. The end cap can be fixedly connected with the open end of the cell housing to form a sealed chamber for sealing the cell pole group. Because of the light design requirement, the battery cell shell is generally made of aluminum, the aluminum is relatively light in mass density, and the battery cell shell has great advantages in corrosion resistance and heat dissipation. In order to increase the energy density per unit volume in the blade battery, the thickness of the side wall of the battery cell casing is continuously reduced, and the minimum thickness can reach 0.35mm. Therefore, the overall strength of the battery cell shell is low, and the flatness is not easy to control.

At present, the strength of the traditional battery cell shell is lower, and the production and use requirements cannot be met.

Disclosure of Invention

In order to solve the problems that the strength of the traditional battery cell shell is low and the production and use requirements cannot be met, the utility model provides a battery cell shell and a battery cell.

The utility model provides a battery cell shell for realizing the purpose, which comprises a battery cell shell body, an upper reinforcing part and a lower reinforcing part;

the battery cell shell body is hollow, a battery cell electrode group accommodating cavity is formed in the battery cell shell body, an upper accommodating groove is formed in the top of the battery cell shell body, and a lower accommodating groove is formed in the bottom of the battery cell shell body;

the upper reinforcing part is arranged in the upper accommodating groove;

the lower reinforcement part is arranged in the lower accommodating groove.

In some of these embodiments, the upper receiving groove has a concave portion and a convex portion; the upper reinforcement part comprises an upper reinforcement block and an upper reinforcement ring;

the upper reinforcing ring is positioned in the concave part of the upper accommodating groove, and the upper reinforcing block is positioned in the convex part of the upper accommodating groove;

and/or the lower accommodating groove is also provided with a concave part and a convex part, and the lower reinforcing part comprises a lower reinforcing block and a lower reinforcing ring;

the lower reinforcing ring is positioned in the concave part of the lower accommodating groove, and the lower reinforcing block is positioned in the convex part of the lower accommodating groove.

In some embodiments, the top-down orthographic projection of the upper stiffener is an oval structure;

and/or, the orthographic projection of the upper reinforcing ring from top to bottom is an elliptical ring structure;

and/or, orthographic projection of the lower reinforcing block from top to bottom is of an elliptic structure;

and/or, the orthographic projection of the lower reinforcing ring from top to bottom is an elliptical ring structure.

In some embodiments, the middle part of the top of the upper reinforcing block is provided with an upper protruding part facing the top of the upper accommodating groove;

and/or the middle part of the bottom of the lower reinforcing block is provided with a lower protruding part facing to the bottom of the lower accommodating groove.

In some embodiments, the bottom of the upper accommodating groove protrudes towards the inside of the battery cell housing body and can be abutted to the top of the battery cell electrode group, and the middle of the top protrudes towards the outside of the battery cell housing body;

and/or the top of the lower accommodating groove protrudes towards the inside of the battery cell shell body and can be abutted to the bottom of the battery cell electrode group, and the middle of the bottom protrudes towards the outside of the shell body.

In some of the specific embodiments, the top of the battery cell housing body is uniformly provided with a plurality of upper accommodating grooves along the length direction of the battery cell housing body, and each upper accommodating groove is respectively provided with an upper reinforcing part;

and/or the bottom of the battery cell shell body is uniformly provided with a plurality of lower accommodating grooves along the length direction of the battery cell shell body, and each lower accommodating groove is respectively provided with a lower reinforcing part.

In some embodiments, the plurality of upper receiving grooves and the plurality of lower receiving grooves are disposed in a one-to-one opposite manner.

In some embodiments, the bottom edge of the upper receiving groove; and/or the edges of the top of the lower accommodating groove are respectively rounded.

A battery cell based on the same concept, comprising a battery cell electrode group and a battery cell shell provided by any of the specific embodiments;

the battery cell electrode group is arranged in the battery cell electrode group accommodating cavity of the battery cell housing body of the battery cell housing.

In some embodiments, the top end of the battery cell electrode group is abutted against the bottom of the upper accommodating groove of the battery cell shell body; and/or the bottom end is propped against the top of the lower accommodating groove of the battery cell shell body.

The utility model has the beneficial effects that:

(1) The upper reinforcing part is embedded in the upper accommodating groove, and the lower reinforcing part is embedded in the lower accommodating groove, so that the occupation of the outer space of the battery cell shell body and the space in the accommodating cavity of the battery cell pole group is reduced, the whole size of the battery cell shell is not greatly changed, and the energy density in unit volume is improved.

(2) Because the upper reinforcing part is pre-buried in the upper accommodating groove, and the lower reinforcing part is pre-buried in the lower accommodating groove, the strength of the battery cell shell body is effectively improved, the deformation resistance of the battery cell shell is improved, and the local part of the battery cell shell body is not easy to deform. The electric core assembly device is beneficial to keeping the smoothness of ventilation in the accommodating cavity of the electric core electrode group, improving the safety of the electric core, keeping the appearance of the electric core shell smooth and being beneficial to the electric core assembly.

(3) The upper accommodating groove and the lower accommodating groove can limit the battery cell electrode group in the battery cell electrode group accommodating cavity, so that the stability of the position of the battery cell electrode group is maintained, the shaking amplitude of the battery cell electrode group is reduced, and the reliability of the battery cell is improved.

Drawings

FIG. 1 is a schematic diagram of some embodiments of a cell housing according to the present utility model;

FIG. 2 is a cross-sectional view of the cell housing of FIG. 1 taken along the length of the body;

fig. 3 is a partial enlarged view of the area a in fig. 2.

In the drawing, 110, a battery cell housing body; 111. an upper receiving groove; 112. a lower accommodating groove; 120. an upper reinforcement portion; 121. an upper reinforcing block; 122. an upper reinforcing ring; 130. a lower reinforcement portion; 131. a lower reinforcing block; 132. and a lower reinforcing ring.

Detailed Description

The following description of the embodiments of the present utility model 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 utility model, but not all embodiments.

Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. 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.

In the description of the present utility model, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus 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 one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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.

As shown in fig. 1, a coordinate system is established, the X-axis extending direction is the body length direction of the cell case body 110, the Y-axis extending direction is the body width direction of the cell case body 110, and the Z-axis extending direction is the raising direction of the cell case body 110.

Referring to fig. 1, 2 and 3, as some embodiments of the present utility model, a cell case includes a cell case body 110, an upper reinforcement 120 and a lower reinforcement 130. The battery cell housing body 110 is of a hollow structure, and a battery cell electrode group accommodating cavity is formed inside the battery cell housing body. An upper receiving groove 111 is provided in the top of the battery cell case body 110, and a lower receiving groove 112 is provided in the bottom. The upper reinforcement 120 is disposed in the upper receiving groove 111. The lower reinforcement 130 is disposed in the lower receiving groove 112.

In these embodiments, the upper reinforcement portion 120 is pre-buried in the upper accommodating groove 111, and the lower reinforcement portion 130 is pre-buried in the lower accommodating groove 112, so that the occupation of the external space of the cell housing body 110 and the space in the cell electrode group accommodating cavity is reduced, the overall size of the cell housing is not greatly changed, and the energy density in unit volume is improved. Because the upper reinforcing part 120 is pre-buried in the upper accommodating groove 111 and the lower reinforcing part 130 is pre-buried in the lower accommodating groove 112, the strength of the battery cell housing body 110 is effectively improved, the deformation resistance of the battery cell housing is improved, and the local part of the battery cell housing body 110 is not easy to deform. The electric core assembly device is beneficial to keeping the smoothness of ventilation in the accommodating cavity of the electric core electrode group, improving the safety of the electric core, keeping the appearance of the electric core shell smooth and being beneficial to the electric core assembly. In addition, the upper accommodating groove 111 and the lower accommodating groove 112 can limit the battery cell pole group in the battery cell pole group accommodating cavity, so that the stability of the position of the battery cell pole group is maintained, the shaking amplitude of the battery cell pole group is reduced, and the reliability of the battery cell is improved.

In some of these applications, the upper receiving groove 111 has a concave portion and a convex portion, and the upper reinforcement 120 includes an upper reinforcement block 121 and an upper reinforcement ring 122. The upper reinforcing ring 122 is located in the concave portion of the upper receiving groove 111, and the upper reinforcing block 121 is located in the convex portion of the upper receiving groove 111. Also, the lower receiving groove 112 has concave and convex portions, and the lower reinforcement 130 includes a lower reinforcement block 131 and a lower reinforcement ring 132. The lower reinforcing ring 132 is located in the concave portion of the lower receiving groove 112, and the lower reinforcing block 131 is located in the convex portion of the lower receiving groove 112.

In other applications, the upper receiving groove 111 has a concave portion and a convex portion, and the upper reinforcement 120 includes an upper reinforcement block 121 and an upper reinforcement ring 122. The upper reinforcing ring 122 is located in the concave portion of the upper receiving groove 111, and the upper reinforcing block 121 is located in the convex portion of the upper receiving groove 111. Alternatively, the lower receiving groove 112 also has concave and convex portions, and the lower reinforcement 130 includes a lower reinforcement block 131 and a lower reinforcement ring 132. The lower reinforcing ring 132 is located in the concave portion of the lower receiving groove 112, and the lower reinforcing block 131 is located in the convex portion of the lower receiving groove 112.

In some embodiments of the present utility model, the upper reinforcement 120 includes an upper reinforcement block 121 and an upper reinforcement ring 122. The upper reinforcing block 121 and the upper reinforcing ring 122 are disposed in the upper accommodating groove 111, and the upper reinforcing ring 122 is disposed around the outer periphery of the upper reinforcing block 121. The lower reinforcement 130 includes a lower reinforcement block 131 and a lower reinforcement ring 132. The lower reinforcing block 131 and the lower reinforcing ring 132 are disposed in the lower accommodating groove 112, and the lower reinforcing ring 132 is disposed around the outer periphery of the lower reinforcing block 131.

In some embodiments of the present utility model, the top stiffening block 121 is projected in an oval configuration from top to bottom. And/or, the upper stiffening ring 122 is orthographically projected from top to bottom as an elliptical ring structure. And/or, the lower reinforcement block 131 is orthographically projected from top to bottom in an elliptical configuration. And/or, the lower stiffening ring 132 is projected from top to bottom as an elliptical ring structure.

In some embodiments of the present utility model, the middle of the top of the upper reinforcing block 121 is provided with an upper protrusion toward the top of the upper receiving groove 111, and/or the middle of the bottom of the lower reinforcing block 131 is provided with a lower protrusion toward the bottom of the lower receiving groove 112.

In some embodiments of the present utility model, the bottom of the upper accommodating groove 111 protrudes toward the inside of the cell housing body 110, and can be abutted to the top of the cell electrode group, and the middle of the top protrudes toward the outside of the cell housing body 110. And/or, the top of the lower accommodating groove 112 protrudes towards the inside of the battery cell housing body 110, and can be abutted to the bottom of the battery cell pole group, and the middle of the bottom protrudes towards the outside of the housing. In this way, the upper accommodating groove 111 and the lower accommodating groove 112 can limit the battery cell pole group in the battery cell pole group accommodating cavity, so that the stability of the position of the battery cell pole group is maintained, the shaking amplitude of the battery cell pole group is reduced, and the reliability of the battery cell is improved.

In some embodiments of the present utility model, the top of the battery cell housing body 110 is uniformly provided with a plurality of upper receiving grooves 111 along the length direction of the battery cell housing body 110, and each upper receiving groove 111 is provided with an upper reinforcing portion 120. And/or, the bottom of the battery cell housing body 110 is uniformly provided with a plurality of lower accommodating grooves 112 along the length direction of the battery cell housing body 110, and each lower accommodating groove 112 is respectively provided with a lower reinforcing part 130. Thus, the strength of the battery cell housing is further improved.

In some embodiments of the present utility model, the plurality of upper receiving grooves 111 and the plurality of lower receiving grooves 112 are disposed in a one-to-one opposite direction.

In some embodiments of the present utility model, the bottom edge of the upper receiving groove 111 and/or the edge of the top of the lower receiving groove 112 are rounded, respectively. Thus, the battery cell electrode is convenient to assemble into the battery cell shell. When the battery cell is assembled into the battery cell casing, the damage degree of the edges of the bottom of the upper accommodating groove 111 and the top of the lower accommodating groove 112 to the battery cell electrode group is reduced.

The utility model also provides a battery cell, which comprises a battery cell electrode group and the battery cell shell provided by any specific embodiment. The battery cell electrode group is arranged in the battery cell electrode group accommodating cavity of the battery cell housing body 110 of the battery cell housing.

In these embodiments, the upper reinforcement portion 120 is pre-buried in the upper accommodating groove 111, and the lower reinforcement portion 130 is pre-buried in the lower accommodating groove 112, so that the occupation of the external space of the cell housing body 110 and the space in the cell electrode group accommodating cavity is reduced, the overall size of the cell housing is not greatly changed, and the energy density in unit volume is improved. Because the upper reinforcing part 120 is pre-buried in the upper accommodating groove 111 and the lower reinforcing part 130 is pre-buried in the lower accommodating groove 112, the strength of the battery cell housing body 110 is effectively improved, the deformation resistance of the battery cell housing is improved, and the local part of the battery cell housing body 110 is not easy to deform. The electric core assembly device is beneficial to keeping the smoothness of ventilation in the accommodating cavity of the electric core electrode group, improving the safety of the electric core, keeping the appearance of the electric core shell smooth and being beneficial to the electric core assembly.

In some embodiments of the present utility model, the top end of the battery cell electrode group is abutted against the bottom of the upper receiving groove 111 of the battery cell housing body 110, and/or the bottom end is abutted against the top of the lower receiving groove 112 of the battery cell housing body 110. The upper accommodating groove 111 and the lower accommodating groove 112 can limit the battery cell pole group in the battery cell pole group accommodating cavity, so that the stability of the position of the battery cell pole group is maintained, the shaking amplitude of the battery cell pole group is reduced, and the reliability of the battery cell is improved.

The battery cell housing body 110 of the present application may be any housing suitable for a battery cell of a blade battery, and may have a rectangular structure or other structures.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," etc., means 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 terms do not necessarily refer 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.

The present utility model is not limited to the above preferred embodiments, and any person skilled in the art, within the scope of the present utility model, may apply to the present utility model, and equivalents and modifications thereof are intended to be included in the scope of the present utility model.

Claims (10)

1. A cell housing comprising:

the battery cell casing comprises a battery cell casing body, an upper reinforcing part and a lower reinforcing part;

the battery cell shell body is hollow, a battery cell electrode group accommodating cavity is formed in the battery cell shell body, an upper accommodating groove is formed in the top of the battery cell shell body, and a lower accommodating groove is formed in the bottom of the battery cell shell body;

the upper reinforcing part is arranged in the upper accommodating groove;

the lower reinforcing part is arranged in the lower accommodating groove.

2. The cell housing of claim 1, wherein the upper receiving groove has a concave portion and a convex portion; the upper reinforcing part comprises an upper reinforcing block and an upper reinforcing ring;

the upper reinforcing ring is positioned in the concave part of the upper accommodating groove, and the upper reinforcing block is positioned in the convex part of the upper accommodating groove;

and/or the lower accommodating groove is also provided with a concave part and a convex part, and the lower reinforcing part comprises a lower reinforcing block and a lower reinforcing ring;

the lower reinforcing ring is positioned in the concave part of the lower accommodating groove, and the lower reinforcing block is positioned in the convex part of the lower accommodating groove.

3. The cell housing of claim 2, wherein the upper stiffener is orthographic projected from top to bottom in an oval configuration;

and/or, orthographic projection of the upper reinforcing ring from top to bottom is an elliptical ring structure;

and/or, orthographic projection of the lower reinforcing block from top to bottom is an elliptic structure;

and/or, the orthographic projection of the lower reinforcing ring from top to bottom is an elliptical ring structure.

4. The cell case as claimed in claim 2, wherein a middle portion of the top of the upper reinforcement block is provided with an upper protrusion toward the top of the upper receiving groove;

and/or the middle part of the bottom of the lower reinforcing block is provided with a lower protruding part facing the bottom of the lower accommodating groove.

5. The cell casing according to any one of claims 1 to 4, wherein the bottom of the upper accommodating groove protrudes inwards of the cell casing body and can be abutted to the top of the cell electrode group, and the middle of the top protrudes outwards of the cell casing body;

and/or, the top of the lower accommodating groove protrudes towards the inside of the battery cell shell body and can be abutted to the bottom of the battery cell electrode group, and the middle of the bottom protrudes towards the outside of the battery cell shell body.

6. The battery cell casing according to any one of claims 1 to 4, wherein a plurality of upper accommodating grooves are uniformly formed in the top of the battery cell casing body along the longitudinal direction of the battery cell casing body, and the upper reinforcing parts are respectively arranged in each upper accommodating groove;

and/or, a plurality of lower accommodating grooves are uniformly formed in the bottom of the battery cell shell body along the length direction of the battery cell shell body, and each lower accommodating groove is respectively provided with the lower reinforcing part.

7. The cell housing of claim 6, wherein a plurality of the upper receiving grooves and a plurality of the lower receiving grooves are disposed in a one-to-one facing relationship.

8. The cell housing of any one of claims 1 to 4, wherein a bottom edge of the upper receiving groove; and/or the edges of the top of the lower accommodating groove are respectively rounded.

9. A battery cell comprising a battery cell pole set and the battery cell housing of any one of claims 1 to 8;

the battery cell electrode group is arranged in the battery cell electrode group accommodating cavity of the battery cell housing body of the battery cell housing.

10. The battery cell of claim 9, wherein a top end of the battery cell pole group abuts a bottom of the upper receiving groove of the battery cell housing body; and/or the bottom end is propped against the top of the lower accommodating groove of the battery cell shell body.

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