CN217009494U - Battery core and battery pack - Google Patents

Abstract

The utility model discloses a battery cell and a battery pack with the battery cell. The housing, the first electrode and the second electrode are combined into an integral structure. The electrode group is provided with a first electrode lug and a second electrode lug, the electrode group is installed in the first shell, the first electrode lug is in lap joint with the first electrode, and the second electrode lug is in lap joint with the second electrode. The second shell and the first shell are matched into a shell wrapping the pole group. According to the battery cell provided by the embodiment of the utility model, the shell and the pole group are arranged, so that the assembly process of the battery cell in the battery pack assembly line production can be simplified, the complexity of battery cell assembly is reduced, and the steps required in the battery cell assembly are reduced.

Description

Battery core and battery pack

Technical Field

The utility model relates to the technical field of electric quantity storage equipment, in particular to an electric core and a battery pack with the electric core.

Background

At present, the battery core assembly scheme is extremely complex, more assembly processes are provided, the positive electrode and the negative electrode are produced in a staggered mode, and the positive electrode and the negative electrode cannot be produced in a synchronous flow line, so that a novel battery core assembly scheme needs to be developed to reduce assembly steps, and the purpose of simplifying the process is achieved.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least in part, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a battery cell, which is provided with a casing and a pole group, and can simplify the assembly process of the battery cell in the battery pack production line, reduce the complexity of the battery cell assembly, and reduce the steps required in the battery cell assembly.

Another object of the present invention is to provide a battery pack, which includes the foregoing battery cells.

The battery cell comprises a first shell, a pole group and a second shell, wherein a first electrode and a second electrode are integrated on the first shell. The housing, the first electrode and the second electrode are combined into an integral structure. The electrode group is provided with a first electrode lug and a second electrode lug, the electrode group is installed in the first shell, the first electrode lug is in lap joint with the first electrode, and the second electrode lug is in lap joint with the second electrode. The second shell and the first shell are matched into a shell wrapping the pole group.

In addition, the battery cell according to the above embodiment of the present invention may further have the following additional technical features:

optionally, the first electrode and the second electrode are respectively disposed at two opposite ends of the first shell.

Alternatively, the first case is configured in a flat plate shape, the second case is configured in a cavity structure having an opening, and the second case is covered on the first case to enclose the pole group.

Optionally, the first housing and the second housing are each configured as a cavity structure with an opening, and the first housing and the second housing are mutually buckled to wrap the pole group.

Optionally, first holding chamber and second holding chamber that have mutual intercommunication in the first casing, the both ends in first holding chamber all are equipped with second holding chamber, the degree of depth in second holding chamber is less than the degree of depth in first holding chamber, first electrode with the second electrode is connected respectively on the diapire in the second holding chamber that corresponds, utmost point group imbeds first holding intracavity, first utmost point ear with second utmost point ear imbeds corresponding second holding intracavity respectively, and respectively with first electrode with the butt joint of second electrode, wherein, the width size in second holding chamber with the width size in first holding chamber is the same or different.

Optionally, third holding chamber and fourth holding chamber that have mutual intercommunication in the second casing, the both ends in third holding chamber all are equipped with fourth holding chamber, the degree of depth in fourth holding chamber is less than the degree of depth in third holding chamber, utmost point group imbeds the third holding intracavity, first utmost point ear with second utmost point ear imbeds the fourth holding intracavity that corresponds respectively, wherein, the width dimension in fourth holding chamber with the width dimension in third holding chamber is the same or different.

Optionally, the first electrode and the second electrode extend towards the same side of the first housing relative to the first housing.

Optionally, the first electrode and the second electrode are respectively disposed in a middle region of the corresponding end portion of the first casing.

Optionally, the end face of at least one end of the outer shell is provided with a notch to construct an explosion-proof valve structure.

Optionally, a liquid injection port is arranged on an end face of at least one end of the housing.

Optionally, the length L of the battery cell is 200mm to 2800 mm.

Optionally, the width W of the cell is 80mm to 150 mm.

Optionally, the thickness H of the battery cell is 10mm to 60 mm.

Optionally, the first tab and the second tab are respectively connected to two opposite ends of the pole group.

Optionally, the size of the first tab and the second tab in the width direction of the pole group is the same as the width size of the pole group.

Optionally, the width dimensions of the first and second tabs are different from the width dimensions of the pole group.

Optionally, two side surfaces of the first tab and the second tab in the width direction of the electrode group are parallel to two side surfaces of the electrode group in the width direction.

Optionally, two side surfaces of the first tab and the second tab in the width direction of the electrode group are inclined towards a direction of approaching each other in a direction away from the electrode group, and an inclination angle of the side surface relative to the side surface of the electrode group is in a range from 45 ° to 90 °.

The battery pack provided by the embodiment of the utility model comprises the battery cell in any one of the above columns.

Drawings

Fig. 1 is a schematic diagram of a cell according to an embodiment of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a partially enlarged schematic view of fig. 2.

Fig. 4 is a partially enlarged schematic view of fig. 1.

Fig. 5 is a schematic view of a first housing of a cell in an embodiment of the utility model.

Fig. 6 is a schematic diagram of a first casing of a cell in an embodiment of the utility model.

Fig. 7 is a schematic diagram of a pole group of cells in an embodiment of the utility model.

Fig. 8 is a schematic diagram of a pole group of a cell in an embodiment of the utility model.

Fig. 9 is a schematic diagram of a second casing of a battery cell in an embodiment of the utility model.

Fig. 10 is a schematic view of a second casing of a battery cell in an embodiment of the utility model.

Fig. 11 is a schematic diagram of a pole group of a cell in an embodiment of the utility model.

Reference numerals:

the battery comprises a battery core 100, a pole group 10, a first pole lug 10a, a second pole lug 10b, a first shell 11, a first accommodating cavity 11a, a second accommodating cavity 11b, a second shell 12, a third accommodating cavity 12a, a fourth accommodating cavity 12b, an explosion-proof valve 13, a liquid injection port 14, a first electrode 15 and a second electrode 16.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The utility model provides a novel battery core and a battery pack with the same, wherein the battery core is provided with a shell and a pole group, so that the assembly procedure of the battery core in the assembly line production of the battery pack can be simplified, the complexity of the assembly of the battery core is reduced, and the steps required in the assembly of the battery core are reduced. A battery cell according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1, 2, and 3, a battery cell 100 according to an embodiment of the present invention includes a pole group 10, a first casing 11, and a second casing 12, where a first electrode 15 and a second electrode 16 are integrated on the first casing 11, where the first electrode 15 and the second electrode 16 may be two terminals of the battery cell 100, where current is input and/or output. First casing 11, first electrode 15 and second electrode 16 cooperate an organic whole structure, and the integrative structure that its three constitute has the collection degree higher, and the good characteristics of structural stability are convenient for electric core 100 assembly. The electrode group 10 has a first tab 10a and a second tab 10b, the electrode group 10 is mounted on the first housing 11, the first tab 10a is overlapped with the first electrode 15, and the second tab 10b is overlapped with the second electrode 16. Specifically, when the electrode group 10 and the first casing 11 are assembled together, the first tab 10a is butted with the first electrode 15, and the second tab 10b is butted with the second electrode 16, that is, the overlapping of a plurality of tabs and a plurality of electrodes can be simultaneously realized, and it is not necessary that each tab is separately connected with a corresponding electrode, so that the assembly of the battery cell 100 is facilitated, and the manufacturing efficiency of the battery cell 100 is improved. The first tab 10a and the second tab 10b may be metal conductors that lead positive and negative electrodes from the electrode group 10, and the first electrode 15 and the second electrode 16 may be contact points of the battery cell 100 during charging and/or discharging.

According to the battery cell 100 provided by the embodiment of the utility model, the first electrode 15 and the second electrode 16 are integrated with the first shell 11, and when the electrode group 10 is assembled with the first shell 11, the first electrode 15 and the first tab 10a, and the second electrode 16 and the second tab 10b can be overlapped and conducted, so that a plurality of tabs can be conveniently and quickly connected with corresponding electrodes, and the problem that the assembly process of the battery cell 100 is complex because the plurality of tabs are respectively connected with corresponding electrodes is avoided, thereby reducing the assembly process of the battery cell 100, saving the assembly time and reducing the cost.

Wherein, first utmost point ear 10a and first electrode 15, second utmost point ear 10b and second electrode 16 all can adopt lapped connected mode, after the overlap joint is accomplished, can observe, repair the back and install second casing 12 to the overlap joint condition, thereby realize the protection to utmost point group 10 through the cooperation of first casing 11 and second casing 12.

In addition, the first tab 10a and the second tab 10b in some embodiments of the present invention may be disposed at the same end or different ends of the electrode group 10, and correspondingly, the first electrode 15 and the second electrode 16 may also be disposed at the same end or different ends of the first housing 11. Of course, the first tab 10a and the second tab 10b may be disposed at other positions on the electrode group 10, and the same first electrode 15 and the second electrode 16 may be disposed at other positions on the first housing 11, so long as the overlapping of the plurality of tabs and the plurality of electrodes can be achieved when the electrode group 10 is mounted on the first housing 11. The present invention provides some specific embodiments, that is, the first electrode 15 and the second electrode 16 are respectively disposed at two opposite ends of the first housing 11, but this is not a limitation to the scope of the present invention, but rather, the technical solution of the present invention is fully, completely and clearly illustrated.

As shown in fig. 5, in some embodiments of the present invention, the first electrode 15 and the second electrode 16 are respectively disposed at two opposite ends of the first casing 11, and in the matching structure of the electrode group 10 and the first casing 11, the electrode tabs of the positive electrode and the electrode tabs of the negative electrode may be connected simultaneously, so as to reduce the assembly process of the battery cell 100, and facilitate the flow line production of the battery cell 100.

As shown in fig. 6, 7 and 9, in some embodiments of the present invention, the second casing 12 and the first casing 11 cooperate to form a casing surrounding the electrode group 10, so as to protect the electrode group 10 and improve the safety and stability of the battery cell 100.

The first housing 11 may be in a flat plate shape, may also be in a cavity structure with an opening, and may also be in structures similar to the foregoing two, the second housing 12 may be in a cavity structure with an opening, may also be in a flat plate shape, and may also be in a structure similar to the foregoing two, the shapes of the first housing 11 and the second housing 12 may be molded for matching with the pole groups 10 in different shapes, which facilitates the assembly of the first housing 11, the second housing 12 and the pole groups 10, and simultaneously simplifies the structure of the battery cell 100, reduces the steps of assembly, and is beneficial to the flow line production of the battery cell 100.

It should be added that, according to some embodiments of the present invention, the material of the first casing 11 and the second casing 12 may be aluminum, or may be other materials, wherein the first casing 11 and the second casing 12 may be molded into an aluminum shell.

As shown in fig. 5, 7 and 9, in some embodiments of the present invention, the first casing 11 may be configured in a flat plate shape, the second casing 12 may be configured in a cavity structure having an opening, and the second casing 12 is covered on the first casing 11 to wrap the pole group 10. The first electrode 15 and the second electrode 16 are both provided on the first casing 11 in a flat plate shape, so that when the electrode group 10 is mounted on the first casing 11, the first tab 10a and the first electrode 15, and the second tab 10b and the second electrode 16 can be connected quickly, thereby improving the assembly efficiency.

In addition, as shown in fig. 6, 7 and 9, in other embodiments of the present invention, each of the first casing 11 and the second casing 12 may be configured as a cavity structure having an opening, and the first casing 11 and the second casing 12 are fastened to each other to wrap the pole group 10. The first housing 11 and the second housing 12 may be connected by being buckled to each other, or by being connected by having a similar function.

Further, as shown in fig. 6, the first housing 11 has a first accommodation chamber 11a and a second accommodation chamber 11b therein, which communicate with each other. The two ends of the first accommodating cavity 11a are both provided with second accommodating cavities 11b, the depth of the second accommodating cavities 11b is smaller than the depth of the first accommodating cavity 11a (the depth of the second accommodating cavities 11b may also be greater than or equal to the depth of the first accommodating cavity 11a), wherein the first accommodating cavity 11a and the second accommodating cavity 11b in the first housing 11 are configured to provide a space for the installation and the cooperation of the electrode group 10, the first electrode 15 and the second electrode 16 are respectively connected to the bottom wall of the corresponding second accommodating cavity 11b, the electrode group 10 is embedded into the first accommodating cavity 11a, the first tab 10a and the second tab 10b are respectively embedded into the corresponding second accommodating cavity 11b and are respectively butted with the first electrode 15 and the second electrode 16, wherein the butting mode may be welding connection or connection mode with the same function. In addition, the first accommodating chamber 11a and the second accommodating chamber 11b which are communicated with each other can also facilitate smooth circulation of the liquid medium injected from the liquid injection port 14 to protect the electrode group 10.

Specifically, in the process of assembling the battery cell 100, the first tab 10a and the second tab 10b of the electrode group 10 are respectively installed in cooperation with the second accommodating cavity 11b in the first housing 11, the part of the electrode group 10 outside the tab is installed in cooperation with the first accommodating cavity 11a in the first housing 11, and finally, the installed structural body is installed in cooperation with the second housing 12, so that the battery cell 100 is completed.

Specifically, as shown in fig. 6, the width of the first housing 11a in the first housing 11 may be the same as the width of the second housing 11b, and as shown in fig. 10, the width of the first housing 11a may also be different from the width of the second housing 11b, wherein the width of the second housing 11b is smaller than the width of the first housing 11 a. The width dimensions of the first accommodating cavity 11a and the second accommodating cavity 11b mainly depend on the shape of the pole group 10 wrapped by the housing, and if the portion of the pole group 10 connected to the second accommodating cavity 11b is smaller than the portion of the pole group 10 connected to the first accommodating cavity 11a, the second accommodating cavity 11b is also shorter than the first accommodating cavity 11a in terms of the width dimensions of the accommodating cavities.

As shown in fig. 9, in some embodiments of the present invention, the second casing 12 has a third accommodating cavity 12a and a fourth accommodating cavity 12b therein, and the first accommodating cavity 11a and the second accommodating cavity 11b that are communicated with each other may facilitate smooth medium circulation inside the battery cell 100. The two ends of the third accommodating cavity 12a are both provided with fourth accommodating cavities 12b, the depth of the fourth accommodating cavities 12b is smaller than the depth of the third accommodating cavities 12a (the depth of the fourth accommodating cavities 12b can also be greater than or equal to the depth of the third accommodating cavities 12a), wherein the accommodating cavities in the second casing 12 provide space for the installation and the cooperation of the pole groups 10, the pole groups 10 are embedded into the third accommodating cavities 12a, and the first pole lugs 10a and the second pole lugs 10b are respectively embedded into the corresponding fourth accommodating cavities 12 b.

Specifically, as shown in fig. 9, the width of the third accommodating chamber 12a in the second housing 12 may be the same as the width of the fourth accommodating chamber 12 b; as shown in fig. 10, the width of the third receiving cavity 12a may be larger than the width of the fourth receiving cavity 12 b. In addition, the width of the third accommodating chamber 12a may be smaller than the width of the fourth accommodating chamber 12 b. Mainly depending on the shape of the pole group 10 enclosed by the housing, if the portion of the pole group 10 connected to the fourth accommodation cavity 12b is smaller than the portion of the pole group 10 connected to the third accommodation cavity 12a, the fourth accommodation cavity 12b is shorter than the third accommodation cavity 12a in terms of the width dimension of the accommodation cavities.

As shown in fig. 5, in some embodiments of the present invention, the first electrode 15 and the second electrode 16 extend toward the same side of the first housing 11 with respect to the first housing 11. Therefore, the corresponding connection between the first tab 10a and the first electrode 15 and between the second tab 10b and the second electrode 16 in the process of assembling the electrode group 10 and the first housing 11 can be facilitated, and the assembling efficiency of the battery cell 100 can be improved.

In addition, the first electrode 15 and the second electrode 16 may be respectively provided on the central regions of the corresponding end portions of the first housing 11.

As shown in fig. 4, in some embodiments of the present invention, an end surface of at least one end of the housing is provided with a notch to configure an explosion-proof valve 13 structure, where the explosion-proof valve 13 structure may be a VENT (pressure relief) structure notched to the housing, or may be a structure having the same explosion-proof pressure relief function, when the pressure inside the battery cell 100 gradually rises and reaches a pressure critical point set by the explosion-proof valve 13 structure, the explosion-proof valve 13 structure may be ruptured to release the entire pressure inside the battery cell 100, and a current breaking device may be further provided on the explosion-proof valve 13 structure, and the current inside the battery cell 100 may be broken while the explosion-proof valve 13 structure is ruptured to prevent the explosion of the battery cell 100, so that a safety accident may occur and ensure safe use of the battery cell 100.

A liquid injection port 14 is arranged on the end face of at least one end of the shell, wherein the liquid injection port 14 is used for injecting explosion-proof liquid and the like, and the liquid injection port 14 can be arranged on one end face of the first shell 11 and the second shell 12; or on the other end face of the first housing 11 and the second housing 12; or both are arranged on the end surfaces of the first shell 11 and the second shell 12; the pouring port 14 may be provided on a side surface of the casing. Wherein the number of the liquid injection ports 14 provided on the same end face may be at least one.

As shown in fig. 7 and 8, in some embodiments of the present invention, a first tab 10a and a second tab 10b are respectively connected to two opposite ends of the pole group 10, wherein the first tab 10a and the second tab 10b may be connected to the pole group 10 by welding or other connection methods with similar functions.

As shown in fig. 7, the width dimensions of the first and second tabs 10a and 10b are the same as the width dimension of the pole group 10. The width dimension is a dimension along the width direction a-a of the pole group 10. In addition, the width of the first tab 10a and the width of the second tab 10b may be different from the width of the pole group 10, and as shown in fig. 8, the width of the first tab 10a is smaller than the width of the pole group 10, and the width of the second tab 10b is smaller than the width of the pole group 10.

As shown in fig. 7 and 8, in some embodiments of the present invention, two sides of the first tab 10a and the second tab 10b in the width direction a-a of the pole group 10 are parallel to two sides of the pole group 10 in the width direction. The side surface of the pole group 10 in the width direction includes a plane B on the pole group 10, and a plane parallel to the plane B on the pole group 10. Specifically, both side surfaces of the first tab 10a in the width direction of the pole group 10 may be parallel to each other, both side surfaces of the first tab 10a in the width direction of the pole group 10 may be parallel to both side surfaces of the pole group 10 in the width direction, both side surfaces of the second tab 10b in the width direction of the pole group 10 may be parallel to each other, and both side surfaces of the second tab 10b in the width direction of the pole group 10 may be parallel to both side surfaces of the pole group 10 in the width direction.

It should be added that two side surfaces of the first tab 10a in the width direction of the electrode group 10 may be parallel or non-parallel, and two side surfaces of the first tab 10a in the width direction of the electrode group 10 and two side surfaces of the electrode group 10 in the width direction may be parallel or non-parallel. The two side surfaces of the second pole ear 10b in the width direction of the pole group 10 may be parallel to each other or non-parallel to each other, and the two side surfaces of the second pole ear 10b in the width direction of the pole group 10 and the two side surfaces of the pole group 10 in the width direction may be parallel to each other or non-parallel to each other.

As shown in fig. 11, in other embodiments of the present invention, the two side surfaces of the first tab 10a and the second tab 10b in the width direction of the pole group 10 are inclined in the direction of approaching each other in the direction of separating from the pole group 10, in short, the side of the first tab 10a in the width direction of the pole group 10 that is separated from the pole group 10 is close to each other, and the side of the second tab 10b in the width direction of the pole group 10 that is separated from the pole group 10 is close to each other. The side surfaces of the first tab 10a and the second tab 10b are inclined at an angle ranging from 45 ° to 90 ° with respect to the side surface of the electrode group 10, specifically, the side surface of the first tab 10a is inclined at an angle ranging from 45 ° to 90 ° with respect to the side surface of the electrode group 10, and the side surface of the second tab 10a is inclined at an angle ranging from 45 ° to 90 ° with respect to the side surface of the electrode group 10.

Further, the first tab 10a may be close to or far from each other on the side of both sides in the width direction of the electrode group 10 that is far from the electrode group 10, that is, the first tab 10a may be far from or close to each other on the side of both sides in the width direction of the electrode group 10 that is close to the electrode group 10. The sides of the second pole ears 10b in the width direction of the pole group 10 that are far from the pole group 10 may be close to each other or far from each other, that is, the sides of the second pole ears 10b in the width direction of the pole group 10 that are close to the pole group 10 may be far from each other or close to each other.

In order to facilitate assembly of the battery cell 100, one of the first tab 10a and the second tab 10b has at least one structure, and the other of the first tab 10a and the second tab 10b also has at least one structure, and the width dimensions of the first tab 10a and the second tab 10b can be matched to the dimensions of the first casing 11 and the second casing 12 in accordance with assembly requirements.

Additionally, as shown in fig. 1, according to some embodiments of the present invention, the length L of a cell may be in a range of 200 to 2800 millimeters, the width W of a cell may be in a range of 80 to 150 millimeters, and the thickness H of a cell may be in a range of 10 to 60 millimeters.

According to the battery pack in the embodiment of the present invention, the battery cell 100 includes any one of the battery cells 100 listed above, and the battery cell 100 is provided with the first casing 11, the second casing 12 and the pole group 10, so that an assembly process of the battery cell 100 in a battery pack production line can be simplified, complexity of assembly of the battery cell 100 is reduced, and steps required in assembly of the battery cell 100 are reduced.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific 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, the schematic representations of the terms used above are not necessarily intended to 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A battery cell, comprising:

a first shell (11), wherein a first electrode (15) and a second electrode (16) are integrated on the first shell (11), and the shell, the first electrode (15) and the second electrode (16) are matched into a whole structure;

the electrode group (10) is provided with a first electrode lug (10a) and a second electrode lug (10b), the electrode group (10) is installed on the first shell (11), the first electrode lug (10a) is in lap joint with the first electrode (15), and the second electrode lug (10b) is in lap joint with the second electrode (16);

a second casing (12), said second casing (12) cooperating with said first casing (11) to envelope said pole group (10).

2. The electrical core of claim 1, wherein the first electrode (15) and the second electrode (16) are disposed at opposite ends of the first casing (11).

3. The electrical core according to claim 2, characterized in that the first casing (11) is configured as a flat plate, the second casing (12) is configured as a cavity structure with an opening, and the second casing (12) is covered on the first casing (11) to enclose the pole group (10).

4. The electrical core of claim 2, wherein the first casing (11) and the second casing (12) are each configured as an open cavity structure, and the first casing (11) and the second casing (12) are snap-fitted to each other to enclose the pole group (10).

5. The battery cell of claim 4, wherein the first casing (11) has a first accommodating cavity (11a) and a second accommodating cavity (11b) which are communicated with each other, the second accommodating cavity (11b) is disposed at both ends of the first accommodating cavity (11a), the depth of the second accommodating cavity (11b) is smaller than that of the first accommodating cavity (11a), the first electrode (15) and the second electrode (16) are respectively connected to the bottom wall of the corresponding second accommodating cavity (11b), the electrode group (10) is embedded into the first accommodating cavity (11a), the first tab (10a) and the second tab (10b) are respectively embedded into the corresponding second accommodating cavity (11b) and are respectively butted with the first electrode (15) and the second electrode (16),

the width dimension of the second accommodating cavity (11b) is the same as or different from the width dimension of the first accommodating cavity (11 a).

6. The battery cell of any one of claims 3 to 5, wherein the second casing (12) has a third accommodating cavity (12a) and a fourth accommodating cavity (12b) therein, the third accommodating cavity (12a) has a fourth accommodating cavity (12b) at both ends thereof, the fourth accommodating cavity (12b) has a depth smaller than that of the third accommodating cavity (12a), the pole group (10) is embedded in the third accommodating cavity (12a), and the first tab (10a) and the second tab (10b) are respectively embedded in the corresponding fourth accommodating cavities (12b),

the width dimension of the fourth accommodating cavity (12b) is the same as or different from the width dimension of the third accommodating cavity (12 a).

7. The electrical core of any of claims 1 to 5,

the first electrode (15) and the second electrode (16) extend towards the same side of the first housing (11) with respect to the first housing (11); and/or

The first electrode (15) and the second electrode (16) are respectively arranged in the middle area of the corresponding end part of the first shell (11).

8. The electrical core of claim 1,

nicks are arranged on the end face of at least one end of the shell to construct an explosion-proof valve (13) structure; and/or

The end face of at least one end of the shell is provided with a liquid injection port (14); and/or

The length L of the battery cell is 200mm to 2800 mm; and/or

The width W of the battery cell is 80mm to 150 mm; and/or

The thickness H of the battery core is 10mm to 60 mm.

9. The electrical core according to claim 1, wherein the first tab (10a) and the second tab (10b) are respectively connected to opposite ends of the pole group (10),

wherein the width dimensions of the first tab (10a) and the second tab (10b) are the same as the width dimensions of the pole group (10); or

The width dimensions of the first tab (10a) and the second tab (10b) are different from the width dimensions of the pole group (10); or

The two side surfaces of the first tab (10a) and the second tab (10b) in the width direction of the pole group (10) are parallel to the two side surfaces of the pole group (10) in the width direction; or

First utmost point ear (10a) with second utmost point ear (10b) is in the both sides face on utmost point group (10) width direction is keeping away from the direction of utmost point group (10) is towards the direction slope that draws close each other, just the side for the inclination of utmost point group (10) side is at 45 to 90 within ranges.

10. A battery pack, characterized in that the battery pack comprises a cell according to any of claims 1-9.

Images