CN221226460U - Battery and battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and in particular, to a battery and a battery device, where the battery includes a battery core and a housing; the battery cell is arranged in the shell, the battery cell is arranged in the accommodating cavity, the shell comprises a first shell part and a second shell part, the first shell part comprises a first end plate, the second shell part comprises a second end plate, the first end plate and the second end plate are opposite and are arranged in parallel, a first protruding portion deviating from the second end plate is arranged on the first end plate, a second protruding portion close to the first end plate is arranged on the second end plate, the second protruding portion is connected with the first shell part, a first open slot is arranged on the second protruding portion, an opening of the first open slot is positioned on one side deviating from the first end plate, and a orthographic projection of the first protrusion on the second end plate is positioned in a orthographic projection of the first open slot on the second end plate.

Description

Battery and battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery and a battery device.

Background

Battery devices are often provided in electric vehicles for powering the electric vehicles. The battery device can comprise a plurality of single batteries which are arranged in the box body and are connected through the converging device. The battery includes electric core and casing, and in the casing was located to the electric core, through casing protection electric core, the casing generally comprises a plurality of casing parts, and a plurality of casing parts welding are located to the electric core behind the casing to realize the seal of battery. In the related art, in order to weld a plurality of housing parts, a protruding flange is often provided on the housing part, and the flange is easy to damage when the battery is mounted in the housing of the battery device, so that a battery bracket needs to be provided to support the battery, resulting in a complex structure of the battery device and high cost.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure provides a battery and a battery device, and further simplifies the structure of the battery device at least to some extent.

According to one aspect of the present disclosure, there is provided a battery including:

A battery cell;

The battery cell is arranged in the shell, the containing cavity is formed in the shell, the shell comprises a first shell part and a second shell part, the first shell part comprises a first end plate, the second shell part comprises a second end plate, the first end plate and the second end plate are opposite and are arranged in parallel, a first protruding portion deviating from the second end plate is arranged on the first end plate, a second protruding portion close to the first end plate is arranged on the second end plate, the second protruding portion is connected with the first shell part, a first opening groove is formed in the second protruding portion, an opening of the first opening groove is located on one side deviating from the first end plate, and a orthographic projection of the first protrusion on the second end plate is located in a orthographic projection of the first opening groove on the second end plate.

The battery that this disclosed embodiment provided, including electric core and casing, be provided with the holding chamber in the casing, the holding intracavity is located to the electric core, the casing includes first casing spare and second casing spare, first casing spare includes first end plate, second casing spare includes the second end plate, first end plate and second end plate set up relatively, be provided with the first bellying that deviates from first end plate on the first end plate, be provided with the second bellying towards first end plate on the second end plate, second bellying and first casing spare are connected, the problem that the welding flange need be set up on the casing spare has been avoided, thereby also need not set up special battery support holding flange in battery device, at least to a certain extent, and be provided with first open slot on the second bellying, the orthographic projection of first bellying on the second end plate is located in the orthographic projection of first open slot on the second end plate, thereby can be convenient for install the location through the gomphosis connection of first bellying and first open slot when making a plurality of batteries in the battery device pile up, and the stability of connecting in the battery device has been promoted.

According to another aspect of the present disclosure, there is provided a battery device including the above-described battery;

The battery device comprises a plurality of batteries which are arranged in sequence, a first protruding part of a first battery stretches into an opening groove of a second battery, and the first battery and the second battery are two adjacent batteries in the plurality of batteries which are arranged in sequence.

The battery device that this disclosed embodiment provided includes a plurality of batteries, be provided with the holding chamber in the casing in the battery, the holding intracavity is located to the electric core, the casing includes first casing spare and second casing spare, first casing spare includes first end plate, second casing spare includes the second end plate, first end plate and second end plate set up relatively, be provided with the first bellying that deviates from first end plate on the first end plate, be provided with the second bellying towards first end plate on the second end plate, second bellying and first casing spare are connected, the problem that the welding flange need be set up on the casing spare has been avoided, thereby also need not set up special battery support holding flange in the battery device, at least, the structure of battery device has been simplified to a certain extent, and be provided with first open slot on the second bellying, the orthographic projection of first bellying on the second end plate is located in the orthographic projection of first open slot on the second end plate, thereby can be through the gomphosis of first bellying and first open slot when making a plurality of batteries in the battery device pile up, be convenient for install the location, and stability that the battery device is connected has been promoted.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic view of a battery according to an exemplary embodiment of the present disclosure;

Fig. 2 is an exploded view of a battery provided in an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic view of a housing provided in an exemplary embodiment of the present disclosure;

FIG. 4 is a partial schematic view of an apparatus provided by an exemplary embodiment of the present disclosure;

Fig. 5 is a schematic structural view of a battery device according to an exemplary embodiment of the present disclosure.

Reference numerals illustrate:

100. A battery; 10. a housing; 11. a first housing member; 111. a first end plate; 112. a side frame; 12. a second housing member; 121. a second end plate; 101. a first boss; 102. a second protruding portion; 103. a first open slot; 104. a second open slot; 20. a battery cell; 110. a first battery; 120. a second battery; 200. a case; 210. a bottom plate; 220. and (3) a structural beam.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying 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, 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 unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The exemplary embodiments of the present disclosure provide a battery 100, as shown in fig. 1 and 2, including a cell 20 and a case 10; the housing 10 is provided with a receiving cavity, and the battery cell 20 is arranged in the receiving cavity. As shown in fig. 3, the housing 10 includes a first housing member 11 and a second housing member 12, the first housing member 11 includes a first end plate 111, the second housing member 12 includes a second end plate 121, the first end plate 111 and the second end plate 121 are opposite and arranged in parallel, a first protrusion 101 facing away from the second end plate 121 is provided on the first end plate 111, a second protrusion 102 adjacent to the first end plate 111 is provided on the second end plate 121, the second protrusion 102 is connected with the first housing member 11, and a first open slot 103 is provided on the second protrusion 102, an opening of the first open slot 103 is located on a side of the second protrusion 102 facing away from the first end plate 111, and an orthographic projection of the first protrusion on the second end plate 121 is located in an orthographic projection of the first open slot 103 on the second end plate 121.

The battery 100 provided by the embodiment of the disclosure includes a battery cell 20 and a housing 10, a containing cavity is provided in the housing 10, the battery cell 20 is provided in the containing cavity, the housing 10 includes a first housing part 11 and a second housing part 12, the first housing part 11 includes a first end plate 111, the second housing part 12 includes a second end plate 121, the first end plate 111 and the second end plate 121 are oppositely arranged, a first protruding part 101 facing away from the first end plate 111 is provided on the first end plate 111, a second protruding part 102 facing towards the first end plate 111 is provided on the second end plate 121, the second protruding part 102 is connected with the first housing part 11, the problem that a welding flange is required to be provided on the housing 10 is avoided, so that a special battery 100 bracket containing flange is not required to be provided in the battery device, the structure of the battery device is simplified at least to some extent, and a first opening groove 103 is provided on the second protruding part 102, the orthographic projection of the first protruding part 101 on the second end plate 121 is located within the orthographic projection of the first opening groove 103 on the second end plate 121, so that the battery device can be conveniently connected with the battery device through the first protruding part 101 and the first end plate 101 when the battery device is stacked, and the battery device is stably connected.

The following will describe in detail the respective portions of the battery 100 provided by the embodiments of the present disclosure:

The case 10 serves to form the outer contour of the battery 100 and protect the battery cells 20, electrolyte, conductive members, etc. within the battery 100. The housing 10 has a cavity formed therein in which the electrolyte and the conductive member of the battery cell 20 can be disposed. By way of example, the battery 100 provided by the embodiments of the present disclosure may be a prismatic battery 100, for example, the battery 100 may be a rectangular parallelepiped battery or a hexagonal-prism battery, or the like. On this basis, the housing 10 is a hollow prism, and for example, the housing 10 may be a rectangular parallelepiped housing or a hexagonal prism housing.

The housing 10 may include two oppositely disposed first surfaces and a plurality of second surfaces between the two first surfaces, the first surfaces having an area greater than an area of the second surfaces. For example, when the battery 100 is a rectangular parallelepiped battery 100, the case 10 has four second surfaces; the case 10 has six second surfaces when the battery 100 is a hexagonal-prism-shaped battery 100.

The housing 10 includes a first housing member 11 and a second housing member 12, the first housing member 11 includes a first end plate 111, a first boss 101, and a side frame 112, the first boss 101 is provided at an edge of the first end plate 111, the first boss 101 is projected in a direction away from the second end plate 121, the side frame 112 is connected to the first boss 101, and the side frame 112 extends in a direction close to the second end plate 121. By way of example, the first end plate 111, the first boss 101, and the side frame 112 may be an integrally formed structure, with the first end plate 111, the first boss 101, and the side frame 112 being stamped from the same sheet stock.

The side frame 112 includes a plurality of side plates, which are vertically disposed with the first end plate 111. The first end plate 111 forms one first surface of the battery 100, the second end plate 121 forms the other first surface of the battery 100, and the side plate forms the second surface of the battery 100. That is, the area of the first end plate 111 is larger than the area of either side plate, and the area of the second end plate 121 is larger than the area of either side plate.

The first boss 101 has an arc-shaped structure, and the first boss 101 is connected to an edge of the first end plate 111. The first protruding portion 101 includes a first bending section, a first transition section and a second bending section, the first bending section is connected with the first end plate 111, the first bending section is perpendicular to the first end plate 111, and the first transition section is disposed at one end of the first bending section far away from the first end plate 111. The second bending section is connected with the first transition section, the second bending section is parallel to the first bending section and is provided with a space, the side plate is connected with the second bending section, and the side plate and the second bending section are coplanar. That is, the first boss 101 is provided with the second open groove 104 therein, and the second open groove 104 opens toward the second end plate 121. For example, the first boss 101 is formed by bending the first housing member 11, and the second open groove 104 is formed. The second open channel 104 may be used to house electrolyte to improve the cycle life of the battery 100. Or the packaged phase change material or fire extinguishing material can be preset in the second open slot 104, so that the thermal safety of the battery 100 is improved, and the internal thermal inhibition of the single battery 100 is realized.

The side plate is connected with the first end plate 111 through the first bulge, and the side plate is located between the first end plate 111 and the second end plate 121, and the side plate includes main body region and bulge region, and the bulge region is located one side that the main body region is close to the second end plate 121, and the bulge region is provided with the bulge that keeps away from electric core 20, and the orthographic projection of second bulge 102 and bulge on the side plate overlaps at least partially, second bulge 102 and bulge fixed connection. The protruding part is arranged on the side plate and connected with the second protruding part 102, so that the problem of the reduction of the volume of the battery cell 20 caused by the fact that the second protruding part 102 occupies too large space in the shell 10 can be avoided, and the energy density of the battery 100 can be improved.

Wherein the protrusion may be a side plate punched outward, and the protrusion contacts the bottom plate 210 of the case 200 when the battery 100 is mounted in the case 200, a gap is formed between the body region and the bottom plate 210 of the case 200, and the gap may be used to fill a connection adhesive to bond the battery 100 and the bottom plate 210.

The difference in height between the body region and the projections is, for example, 0.1mm to 5mm. For example, the height difference between the body region and the projections may be 0.1mm, 0.2mm, 0.5mm, 1mm, 3mm, 4mm, 5mm, or the like. By setting the height difference between the main body region and the protruding portion to 0.1mm-5mm, the problem that the connecting strength is affected due to the fact that the thickness of the adhesive layer is too small is avoided, and on the other hand, the problem that the effective space of the battery cell 20 in the shell 10 is reduced due to the fact that the height difference between the main body region and the protruding portion is too large is avoided, and the energy density of the battery device is guaranteed.

The second case member 12 includes a second end plate 121 and a second boss 102, the second boss 102 being provided at an edge of the second end plate 121, and the second boss 102 being projected in a direction approaching the first end plate 111. The second protruding portion 102 includes a third bending section, a second transition section, and a fourth bending section, where the third bending section is connected to the second end plate 121, and the third bending section is perpendicular to the second end plate 121, and the second transition section is disposed at an end of the third bending section away from the second end plate 121. The fourth bending section is connected with the second transition section, and the fourth bending section and the third bending section are parallel and have a space to form a first open slot 103. Illustratively, the second boss 102 is formed by bending the second housing member 12.

The height of the first protrusion 101 is greater than the height of the first open groove 103, the height of the first protrusion 101 is the dimension of the first protrusion 101 along the first direction, the height of the first open groove 103 is the height of the first open groove 103 along the first direction, and the first direction is perpendicular to the second end plate 121. The height of the first protruding portion 101 is greater than the height of the first open groove 103, when a plurality of batteries 100 are stacked, the first protruding portion 101 of the first battery 110 is abutted to the first open groove 103 of the second battery 120, so that a gap is formed between the first battery 110 and the second battery 120, the gap can be used as an air heat insulation layer or an expansion space of the battery 100, and a heat insulation pad can be designed in the gap, so that the safety of the battery device is improved.

The width of the first protrusion 101 is smaller than the width of the first open groove 103, the width of the first protrusion 101 is the dimension of the first protrusion 101 in the second direction, the width of the first open groove 103 is the dimension of the first open groove 103 in the second direction, and the second direction is parallel to the second end plate 121. The width of the first protrusion 101 is smaller than the width of the first open groove 103, so that the first protrusion 101 is conveniently engaged with the first open groove 103 when the battery 100 is stacked, and the problem of difficulty in stacking the battery 100 due to a machining error or the like is avoided.

The second direction is parallel to the second end plate 121, that is, the second direction is perpendicular to the side plate. The second direction, which is perpendicular to the side plate, is not fixed and is used to define the first open slot 103 and the first boss 101 width, and is perpendicular to the side plate to which the first boss 101 is connected, for different segments of the first boss 101.

In a possible embodiment, the first case member 11 and the second case member 12 are insulated, and either one of the first case member 11 and the second case member 12 and the battery cell 20 are electrically connected as one electrode terminal of the battery 100, and the other one of the first case member 11 and the second case member 12 and the battery cell 20 are electrically connected as the other electrode terminal of the battery 100. For example, an insulating member is provided between the first housing member 11 and the second housing member 12, and the first housing member 11 and the second housing member 12 are welded to the insulating member, respectively.

It will be appreciated that in other embodiments, the battery 100 may also use a post as the electrode terminal. On this basis, the battery 100 provided in the embodiment of the present disclosure may further include a post, which is provided to the case 10 and is connected to the battery cell 20. A recess may be provided in the housing 10, and the pole may be provided in the recess. For example, the recess may be provided on the first end face or the second end face, or the recess may be provided on the side face. At this time, the first housing member 11 and the second housing member 12 are directly welded, for example, the side frame 112 on the first housing member 11 and the second boss 102 on the second housing member 12 are welded.

The battery cell 20 includes a battery cell main body and a tab, and the tab is disposed at an end of the battery cell main body. For example, tabs may be respectively disposed at both ends of the battery cell main body in the length direction. One end of the battery cell main body is provided with a first tab, and the other end of the battery cell main body is provided with a second tab. One of the first tab and the second tab is a positive tab, and the other one of the first tab and the second tab is a negative tab. When the case 10 serves as an electrode terminal of the battery 100, the first tab is connected to the first case member 11, and the second tab is connected to the second case member 12. When the electrode posts are used as the electrode terminals of the battery 100, the first electrode lugs are connected with the first electrode posts, and the second electrode lugs are connected with the second electrode posts.

It should be noted that, the battery core main body includes more than two pole pieces, and the tab includes more than two monolithic tabs, and the monolithic tab extends out from the pole piece rather than corresponding respectively, and the width of monolithic tab is less than the width of pole piece, thereby a plurality of monolithic tabs stack mutually and form the tab to be connected with the utmost point post, wherein, the tab can be with utmost point post welding. Wherein the single tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, or nickel.

The cells 20 in the disclosed embodiments may be coiled cells or laminated cells. When the battery cell 20 is a laminated battery cell, the battery cell 20 is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell. When the battery cell 20 is a winding type battery cell, the winding type battery cell is obtained by winding a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece.

It should be noted that, in the embodiment of the present disclosure, the first end plate 11 and the second end plate 121 are disposed in parallel, that is, in parallel within the tolerance range, for example, when an acute angle between the first end plate 11 and the second end plate 121 is equal to or less than 10 degrees, the first end plate 11 and the second end plate 121 are considered to be parallel.

The battery 100 provided by the embodiment of the disclosure includes a battery cell 20 and a housing 10, a containing cavity is provided in the housing 10, the battery cell 20 is provided in the containing cavity, the housing 10 includes a first housing part 11 and a second housing part 12, the first housing part 11 includes a first end plate 111, the second housing part 12 includes a second end plate 121, the first end plate 111 and the second end plate 121 are arranged in parallel, a first protruding part 101 facing away from the first end plate 111 is provided on the first end plate 111, a second protruding part 102 facing the first end plate 111 is provided on the second end plate 121, the second protruding part 102 is connected with the first housing part 11, the problem that a welding flange is required to be provided on the housing 10 is avoided, so that a special battery 100 bracket containing flange is not required to be provided in the battery device, the structure of the battery device is simplified to at least a certain extent, and a first opening groove 103 is provided on the second protruding part 102, the orthographic projection of the first protruding part 101 on the second end plate 121 is located within the orthographic projection of the first opening groove 103 on the second end plate 121, so that the battery device can be conveniently connected with the battery device through the first protruding part 101 and the first end plate 101 when the battery device is stacked, and the battery device is connected stably in a positioning way.

The exemplary embodiments of the present disclosure also provide a battery device, as shown in fig. 5, including a battery 100. The battery comprises a battery cell 20 and a housing 10; the battery cell 20 is arranged in the shell 10, the battery cell 10 is arranged in the containing cavity, the shell 10 comprises a first shell piece 11 and a second shell piece 12, the first shell piece 11 comprises a first end plate 111, the second shell piece 12 comprises a second end plate 121, the first end plate 111 and the second end plate 121 are opposite and are arranged in parallel, a first protruding portion 101 deviating from the second end plate 121 is arranged on the first end plate 111, a second protruding portion 102 close to the first end plate 111 is arranged on the second end plate 121, the second protruding portion 102 is connected with the first shell piece 11, a first open slot 103 is arranged on the second protruding portion 102, an opening of the first open slot 103 is located on one side deviating from the first end plate 111, and a orthographic projection of the first protruding portion on the second end plate 121 is located in an orthographic projection of the first open slot 103 on the second end plate 121.

The battery device includes a plurality of sequentially arranged batteries 100, as shown in fig. 4, the first protrusion 101 of the first battery 110 extends into the open slot of the second battery 120, and the first battery 110 and the second battery 120 are two adjacent batteries 100 in the plurality of sequentially arranged batteries 100. When the cells 100 are stacked, the first surfaces of the adjacent cells 100 are opposite, that is, the first end face of the first cell 110 and the second end face of the second cell 120 are opposite.

When the first case member 11 and the second case member 12 in the battery 100 serve as electrode terminals of the battery 100, gaps of the first protruding portions 101 of the first battery 110 and the open grooves of the second battery 120 are filled with conductive adhesive. By filling the gap between the first protrusion 101 of the first battery 110 and the opening groove of the second battery 120 with the conductive adhesive, the conductive performance and connection stability between the first battery 110 and the second battery 120 can be improved.

Further, the battery device provided in the embodiment of the present disclosure may further include a case 200, where the case 200 includes a bottom plate 210 (bottom plate 210, bottom plate, or cold plate, etc.) and a structural beam 220, and the structural beam 220 is connected to the bottom plate 210 to form one or more battery compartments, and the battery 100 is disposed in the battery compartments. The bottom plate 210 is used for supporting the battery 100, and the structural beams 220 are used for limiting the battery 100.

A plurality of stacked cells 100 may be provided in the battery compartment, the large surfaces of adjacent cells 100 are opposite when the plurality of cells 100 are stacked, and the small surfaces of the cells 100 in the length direction are opposite to the bottom plate 210. The plurality of cells 100 in the battery compartment may be electrically connected (in series or in parallel) by a bus bar.

The battery device provided by the embodiment of the disclosure includes a plurality of batteries 100, a containing cavity is provided in a housing 10 in the batteries 100, a battery cell 20 is provided in the containing cavity, the housing 10 includes a first housing part 11 and a second housing part 12, the first housing part 11 includes a first end plate 111, the second housing part 12 includes a second end plate 121, the first end plate 111 and the second end plate 121 are oppositely arranged, a first protruding part 101 facing away from the first end plate 111 is provided on the first end plate 111, a second protruding part 102 facing towards the first end plate 111 is provided on the second end plate 121, the second protruding part 102 is connected with the first housing part 11, the problem that a welding flange is required to be provided on the housing 10 is avoided, so that a special battery 100 support containing flange is not required to be provided in the battery device, the structure of the battery device is simplified at least to some extent, and a first opening groove 103 is provided on the second protruding part 102, the front projection of the first protruding part 101 on the second end plate 121 is located within the front projection of the first opening groove 103 on the second end plate 121, so that the battery device can be conveniently connected with the battery device through the first protruding part 101 when stacking the plurality of battery devices, and the battery device is connected with the first protruding part 100, and the battery device is convenient to position and can be stably connected.

The battery device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery device is used for the electric vehicle, the battery device can be a battery pack which is installed on the electric vehicle and provides energy for the electric vehicle.

In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

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

Claims (10)

1. A battery, the battery comprising:

A battery cell;

The battery cell is arranged in the shell, the containing cavity is formed in the shell, the shell comprises a first shell part and a second shell part, the first shell part comprises a first end plate, the second shell part comprises a second end plate, the first end plate and the second end plate are opposite and are arranged in parallel, a first protruding portion deviating from the second end plate is arranged on the first end plate, a second protruding portion close to the first end plate is arranged on the second end plate, the second protruding portion is connected with the first shell part, a first opening groove is formed in the second protruding portion, an opening of the first opening groove is located on one side deviating from the first end plate, and a orthographic projection of the first protrusion on the second end plate is located in a orthographic projection of the first opening groove on the second end plate.

2. The battery of claim 1, wherein the first protrusion has a height greater than a height of the first open slot, the height of the first protrusion being a dimension of the first protrusion in a first direction, the height of the first open slot being a height of the first open slot in the first direction, the first direction being perpendicular to the second end plate.

3. The battery of claim 1, wherein the first protrusion has a width that is less than a width of the first open slot, the width of the first protrusion being a dimension of the first protrusion in a second direction, the width of the first open slot being a dimension of the first open slot in the second direction, the second direction being parallel to the second end plate.

4. The battery of claim 1, wherein the first housing member further comprises a plurality of side plates, a plurality of the side plates being positioned between the first end plate and the second end plate, the first end plate having an area greater than the area of either of the side plates, the second end plate having an area greater than the area of either of the side plates.

5. The battery of claim 1, wherein a second open slot is provided in the first boss, the second open slot opening toward the second end plate.

6. The battery of any one of claims 1-5, wherein the first boss is formed by bending the first housing member;

the second boss is formed by bending the second housing member.

7. The battery of claim 1, wherein the first housing member and the second housing member are insulated, wherein either one of the first housing member and the second housing member is electrically connected to the first tab of the cell as one electrode terminal of the battery, and wherein the other one of the first housing member and the second housing member is electrically connected to the second tab of the cell as the other electrode terminal of the battery.

8. The battery of claim 1, wherein the first housing member further comprises a plurality of side plates connected by the first boss and the first end plate, and the side plates are located between the first end plate and the second end plate, the side plates comprising a body region and a protruding region, the protruding region being located on a side of the body region adjacent to the second end plate, the protruding region being provided with a protrusion away from the cell, the second boss and the orthographic projection of the protrusion on the side plates at least partially overlapping, the second boss and the protrusion being fixedly connected.

9. A battery device, characterized in that the battery device comprises the battery according to any one of claims 1-8;

The battery device comprises a plurality of batteries which are arranged in sequence, a first protruding part of a first battery stretches into an opening groove of a second battery, and the first battery and the second battery are two adjacent batteries in the plurality of batteries which are arranged in sequence.

10. The battery device of claim 9, wherein a gap between the first protrusion of the first battery and the open slot of the second battery is filled with a conductive adhesive.