Battery monomer and power utilization device

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery monomer and an electric device. The battery monomer comprises a battery cell and a cover plate structure. The battery cell comprises a battery cell main body and a tab, and the battery cell main body is provided with a first end face perpendicular to the center line; the tab comprises a leading-out part and a bending part which are connected in sequence, and the leading-out part is led out from the first end surface of the battery cell main body; an insulating part of the cover plate structure comprises a first insulating plate and an abutting part, and the first insulating plate is provided with a first end in a first direction; the first end of the first insulating plate is connected with the abutting part, and the abutting part abuts against the first end face of the battery cell main body; the tab is positioned between the first insulating plate and the first end surface of the battery cell main body; in the first direction, the abutting part and the bending part are respectively positioned on the two sides of the center line of the battery cell main body. The battery monomer provided by the utility model can have relatively low assembly difficulty, the assembly efficiency is improved, and the electric device has relatively high safety and relatively long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery monomer and an electrical device. Background Art

[0002] The connection between the cover structure and the battery cell greatly affects the assembly process of the battery cell and the shell, which in turn affects the assembly efficiency and the battery qualification rate.

[0003] Single-cell batteries have high manufacturing efficiency and small battery thickness. However, since the tabs are only provided on one side of the cell, the existing technology easily leads to uneven heights between the side with and without tabs, which seriously affects the efficiency of cell shell entry. In addition, if the cover plate structure is tilted, the cell body is easily squeezed and deformed after the battery is assembled, which is not conducive to shaping the tabs and supporting the cell body, causing the cell body to shake when the battery vibrates, thereby affecting the safety and service life of the battery.

[0004] Therefore, there is an urgent need to provide a battery and a battery to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to provide a battery cell, which reduces the difficulty of assembly and improves the efficiency of assembly.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery cell, comprising:

[0008] A battery cell, the battery cell comprising a battery cell body and a tab, the battery cell body having a first end surface perpendicular to its center line; the tab comprising a lead-out portion and a bent portion connected in sequence, the lead-out portion being led out from the first end surface of the battery cell body;

[0009] A cover plate structure, the cover plate structure comprising an insulating member, the insulating member comprising a first insulating plate and abutting portion, the first insulating plate having a first end in a first direction; the first direction and a center line of the battery body are perpendicular to each other; the first end of the first insulating plate is connected to the abutting portion, and the abutting portion abuts against a first end surface of the battery body;

[0010] The pole lug is located between the first insulating plate and the first end surface of the battery cell body; in the first direction, the abutting portion and the bending portion are respectively located on both sides of the center line of the battery cell body.

[0011] Optionally, the pole lug further includes a connecting portion connected to the bending portion; the insulating member further includes a second insulating plate, the second insulating plate is located between the first end surface of the battery cell body and the connecting portion of the pole lug, and the second insulating plate is connected to the first insulating plate.

[0012] Optionally, the abutment portion and the first insulating plate can be folded and connected; one end of the second insulating plate and the abutment portion are integrally formed, and the other end of the second insulating plate and the first insulating plate are detachably connected, adhesively connected, or hot-melt connected.

[0013] Optionally, the abutment portion and the first insulating plate are integrally formed; one end of the second insulating plate and the abutment portion can be folded and connected; the other end of the second insulating plate and the first insulating plate are detachably connected, adhesively connected, or hot-melt connected.

[0014] Optionally, a second fastening piece is provided at one end of the second insulating plate that is detachably connected to the first insulating plate, and a first fastening piece is provided at a position of the first insulating plate corresponding to the second fastening piece, and the first insulating plate and the second insulating plate are connected by snapping the first fastening piece and the second fastening piece.

[0015] Optionally, the first fastening member includes a main body, the main body is connected to a side of the first insulating plate facing the second insulating plate; the main body is provided with a receiving groove, the bottom of the receiving groove is provided with an inserting hole, and the inserting hole extends and passes through the end surface of the main body away from the first insulating plate;

[0016] The second fastening member includes at least one hook, one end of which is connected to a side of the second insulating plate facing the first insulating plate; the other end of which is a hook portion;

[0017] The hook portion of each of the hooks extends into the accommodating groove through the plug hole, and the hook portion of each of the hooks abuts against the bottom of the accommodating groove, and the main body abuts against the second insulating plate.

[0018] Optionally, the second insulating plate abuts against the first end surface of the battery cell body.

[0019] Optionally, two pole ears with opposite polarities are led out from the first end face of the battery cell body, and the two pole ears are spaced apart along a second direction, and the second direction and the first direction are perpendicular to each other; two second insulating plates are provided, and the second insulating plates and the pole ears are in a one-to-one correspondence.

[0020] Optionally, the second insulating plate has a first surface disposed toward the first insulating plate and a second surface opposite to the first surface, the first surface of the second insulating plate is provided with a first protrusion, and the second surface of the second insulating plate is provided with a first recessed portion at a position corresponding to the first protrusion, the first protrusion is provided corresponding to the negative polarity electrode lug, and the first protrusion is located between the connecting portion and the lead-out portion of the electrode lug; the lead-out portion of the electrode lug is accommodated in the first recessed portion;

[0021] Alternatively, a second recessed portion is provided on the first surface of the second insulating plate, a second raised portion is provided on the second surface of the second insulating plate at a position corresponding to the second recessed portion, the second raised portion is provided corresponding to the positive polarity pole ear, and the second raised portion is located between the lead-out portion and the connecting portion of the pole ear; the connecting portion of the pole ear is accommodated in the second recessed portion.

[0022] Another object of the utility model is to provide an electrical device with higher safety and longer service life.

[0023] To achieve this purpose, the utility model adopts the following technical solutions:

[0024] An electric device comprises the battery cell as described above.

[0025] The battery cell and the power-consuming device provided by the utility model have at least the following beneficial effects:

[0026] The utility model provides a battery cell, whose cover plate structure includes an insulating member, the insulating member includes a first insulating plate and a supporting portion connected to a first end of the first insulating plate, and the supporting portion is against a first end surface of a battery cell body, the pole ear includes a lead-out portion and a bent portion, and the bent portion and the supporting portion are located on both sides of a center line of the battery cell body in a first direction, so that the first insulating plate is supported by the bent portion on one side of the center line of the battery cell body in the first direction, and supported by the supporting portion on the other side, thereby preventing the occurrence of uneven height of the first insulating plate, so that when the battery cell is put into the shell, the end surface of the first insulating plate can be guaranteed to be flat, reducing the difficulty of subsequent assembly processes and improving assembly efficiency; and, after the battery cell is assembled, the battery cell body will not be deformed due to the squeezing of the first insulating plate, and the cover plate structure including the first insulating plate can also better support the battery cell body and shape the pole ear, avoiding the risk of reverse insertion, improving the strength and rigidity of the battery cell, reducing the risk of deformation of the cover plate structure of the battery cell body due to vibration, and improving the safety and service life of the battery cell and the electrical device using the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the structure of the battery cell provided by the utility model when it is not assembled. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the structure of the battery cell provided by the utility model when it is not assembled. Figure 2 ;

[0030] Figure 3 It is a structural schematic diagram of a cover plate structure provided by the utility model;

[0031] Figure 4 The utility model provides Figure 3 A in the enlarged view;

[0032] Figure 5 The utility model provides Figure 3 The enlarged view of point B in the figure;

[0033] Figure 6 This is a cross-sectional view of a battery cell provided by the utility model. Figure 1 ;

[0034] Figure 7 This is a cross-sectional view of a battery cell provided by the utility model. Figure 2 ;

[0035] Figure 8 It is a cross-sectional schematic diagram of the battery cell provided by the utility model;

[0036] Fig. 9 This is a cross-sectional view of a battery cell provided by the utility model. Figure 3 ;

[0037] Fig.10 It is a schematic diagram of another cover plate structure provided by the utility model.

[0038] In the figure:

[0039] 100, battery cell body; 110, center line; 120, first end surface;

[0040] 200, pole ear; 210, lead-out portion; 220, bending portion; 230, connecting portion;

[0041] 300, cover plate structure; 310, first insulating plate; 320, abutting portion; 330, second insulating plate; 331, first protruding portion; 332, first recessed portion; 340, second buckling member; 341, hook; 342, hook portion; 350, first buckling member; 351, main body; 352, receiving groove; 353, plug-in hole;

[0042] X, second direction; Y, first direction; Z, third direction. DETAILED DESCRIPTION

[0043] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the prior art, after a single battery cell is placed in a shell, the side with the pole ear will pull the cover plate, so the side without the pole ear will be higher than the side with the pole ear. Secondly, after the battery cell body is placed in the shell, the side without the pole ear has no pole ear support, causing it to collapse when entering the shell. The battery cell provided in this embodiment can effectively solve the problem of uneven end surface of the cover plate.

[0048] like Figures 1 to 9 As shown, the battery cell provided in this embodiment includes a battery cell and a cover plate structure 300. Figure 1 As shown, the battery cell includes a battery cell body 100 and a tab 200 connected to the battery cell body 100. The battery cell body 100 has a first end surface 120 perpendicular to its center line 110. Figure 2 As shown, the tab 200 includes a lead-out portion 210 and a bent portion 220 which are connected in sequence, and the lead-out portion 210 is led out from the first end surface 120 of the battery cell body 100 .

[0049] The cover plate structure 300 in this embodiment includes an insulating member (not shown). Figure 3 As shown, the insulating member includes a first insulating plate 310 and a supporting portion 320 connected. The first insulating plate 310 has a first end in a first direction X. The first direction X and the center line 110 of the battery cell body 100 are perpendicular to each other, and the first direction X is the thickness direction of the battery cell body 100. The first end of the first insulating plate 310 is connected to the supporting portion 320, and the supporting portion 320 is against the first end surface 120 of the battery cell body 100 to support the first insulating plate 310, wherein the number of the supporting portions 320 is not limited, and one, two or three can be set, wherein a plurality of supporting portions 320 need to be arranged at intervals along the second direction Y, and the second direction Y is the length direction of the battery cell body 100.

[0050] In this embodiment, Figure 7 As shown, the pole ear 200 is located between the first insulating plate 310 and the first end surface 120 of the battery cell body 100, and, in the first direction X, the abutting portion 320 and the bending portion 220 are respectively located on both sides of the center line 110 of the battery cell body 100, so that the abutting portion 320 and the bending portion 220 can support the first insulating plate 310 in the first direction X to avoid the first insulating plate 310 from tilting.

[0051] For the battery cell provided in the present embodiment, after the battery cell is loaded into the shell, since the bent portion 220 and the abutting portion 320 of the pole ear are arranged relative to each other in the first direction X, when the cover plate is embedded in the shell and laser welding is performed, it can be ensured that the cover plate remains in a flat state, and there will be no problem of the side of the cover plate away from the pole ear tilting toward the direction close to the battery cell body 100; in addition, the setting of the abutting portion 320 can also prevent the battery cell from shaking in the shell during use or transportation.

[0052] In some optional embodiments, two pole tabs 200 with opposite polarities are led out from the first end surface 120 of the battery cell body 100 , and the two pole tabs 200 are spaced apart along the second direction Y.

[0053] Further, two abutting portions 320 are provided, and the two abutting portions 320 are arranged at intervals along the second direction Y, and the two pole tabs 200 correspond to the two abutting portions 320 one by one, and each abutting portion 320 is arranged opposite to the pole tab 200 corresponding thereto in the first direction X, that is, the abutting portion 320 is arranged opposite to the pole tab 200 corresponding thereto, so as to play a better supporting role. In this embodiment, the first direction X is perpendicular to the second direction Y, and the second direction Y is perpendicular to the thickness direction of the first insulating plate 310.

[0054] In some optional embodiments, Figure 2 or Fig. 9 As shown, the tab 200 further includes a connecting portion 230 connected to the bent portion 220. The connecting portion 230 is connected to an end of the bent portion 220 away from the lead-out portion 210. Figure 2 As shown, the insulating member further includes a second insulating plate 330 . The second insulating plate 330 is located between the first end surface 120 of the battery cell body 100 and the connecting portion 230 of the tab 200 , and is used to separate the battery cell body 100 and the connecting portion 230 .

[0055] In the present embodiment, since the second insulating plate 330 is located between the first end surface 120 of the battery cell body 100 and the connecting portion 230 of the pole lug 200, that is, the bent portion of the pole lug 200 bypasses the second insulating plate 330 to connect the lead-out portion 210 and the connecting portion 230. Therefore, on the one hand, the lead-out portion 210 and the battery cell body 100 are protected from damage by weld marks formed by welding the connecting portion 230 and the pole or adapter sheet. On the other hand, the pole lug 200 is maintained in a certain bending state by the support of the second insulating plate 330.

[0056] In some embodiments, it is found that although the design of the second insulating plate 330 can protect the lead-out portion 210 and the battery body 100, and keep the tab 200 in a bent state, the second insulating plate 330 is not constrained in the shell, and a misalignment problem may occur. This may not only make the second insulating plate 330 fail to protect the lead-out portion 210 and the battery body 100, but also may cause the second insulating plate 330 to damage the tab 200. Therefore, if Figure 1 and Figure 2 As shown, the abutment portion 320 and the first insulating plate 310 can be folded and connected, one end of the second insulating plate 330 and the abutment portion 320 are integrally formed, and the other end of the second insulating plate 330 and the first insulating plate 310 are detachably connected, glued, or hot-melted.

[0057] In this embodiment, since the second insulating plate 330 and the abutting portion 320 are designed to be integrally formed, and the abutting portion 320 and the first insulating plate 310 are designed to be foldable and connected, after the connecting portion 230 of the pole ear 200 needs to be connected to the pole or the adapter, the first insulating plate 310 can be covered on the connecting portion 230 of the pole ear 200 by simply flipping it, which is easy to operate; and the free end of the first insulating plate 310 away from the abutting portion 320 is connected to the second insulating plate 330 to limit the first insulating plate 310 and avoid misalignment of the first insulating plate 310 in the shell.

[0058] In this embodiment, there are various structures in which the abutting portion 320 and the first insulating plate 310 can be folded and connected. Specifically, the abutting portion 320 and the first insulating plate 310 are formed as one piece, a fold is formed at the connection between the abutting portion 320 and the first insulating plate 310, and the abutting portion 320 can be flipped at the fold.

[0059] In this embodiment, one first insulating plate 310 can be designed, and one first insulating plate 310 can simultaneously cover the connection parts 230 of multiple pole tabs 200 located on the same side of the battery cell body 100, so that during assembly, it only needs to be folded once, which improves the production efficiency and the consistency of the cover plate structure 300 after folding. Of course, it can be understood that multiple second insulating plates 330 can also be provided, and the multiple second insulating plates 330 and the multiple pole tabs 200 located on the same side of the battery cell body 100 are in a one-to-one correspondence. For example, two pole tabs 200 with opposite polarities are provided on the same side of the battery cell body 100, and two second insulating plates 330 are provided.

[0060] Furthermore, in order to increase the contact area between the insulating part and the battery cell body 100, and thereby avoid damage to the battery cell body 100 caused by the insulating part when force is applied to the cover plate, the second insulating plate 330 is designed to abut against the first end face 120 of the battery cell body 100. On the one hand, the contact area between the insulating part and the first end face 120 is larger, thereby avoiding damage to the first end face 120 due to excessive local force. On the other hand, the abutment between the second insulating plate 330 and the first end face 120 can better support the battery cell body 100, thereby reducing the probability of deformation of the cover structure 300 due to relative movement between the battery cell body 100 and the cover structure 300.

[0061] It should be noted that when the second insulating plate 330 and the first end face 120 of the battery cell body 100 are against each other, the second insulating plate 330 can be set along the first direction X. At this time, the second insulating plate 330 as a whole is in contact with the first end face 120 of the battery cell body 100. Of course, the second insulating plate 330 can also be set at an angle. At this time, part of the second insulating plate 330 is in contact with the first end face 120 of the battery cell body 100.

[0062] In some embodiments, the free end of the second insulating plate 330 away from the abutment portion 320 is designed to be detachably connected to the first insulating plate 310 to facilitate inspection needs, such as checking the connection between the pole ear 200 and the pole or adapter plate; the above-mentioned detachable methods include but are not limited to snap-on connection, magnetic connection, etc., which are not limited to this embodiment.

[0063] Specifically in this embodiment, Figure 3 As shown, a second fastening member 340 is provided at one end of the second insulating plate 330 that is detachably connected to the first insulating plate 310, and a first fastening member 350 is provided at a position of the first insulating plate 310 corresponding to the second fastening member 340. The first insulating plate 310 and the second insulating plate 330 are connected by the first fastening member 350 and the second fastening member 340 in a clamping manner, which has high connection reliability and stability on the one hand, and high assembly efficiency and low cost on the other hand.

[0064] Optionally, multiple second snap-fitting members 340 and first snap-fitting members 350 are provided to improve the strength and reliability of the clamping connection between the first insulating plate 310 and the second insulating plate 330. For example, two, three, five, etc., of the second snap-fitting members 340 and the first snap-fitting members 350 are provided, and this is not limited in the present embodiment. By way of example, two second snap-fitting members 340 and two first snap-fitting members 350 are provided. The position of the second snap-fitting member 340 on the second insulating plate 330 and the position of the first snap-fitting member 350 on the first insulating plate 310 are not limited. By way of example, the second snap-fitting member 340 is provided at the corner of the second insulating plate 330 away from the abutting portion 320, and correspondingly, the first snap-fitting member 350 is provided at the corner of the first insulating plate 310 away from the abutting portion 320.

[0065] In some optional embodiments, such as Figure 5 As shown, the first fastening member 350 includes a main body 351. The main body 351 is connected to the side of the first insulating plate 310 facing the second insulating plate 330. The main body 351 is provided with a receiving groove 352, and the bottom of the receiving groove 352 is provided with a plug hole 353. The plug hole 353 extends and passes through the end surface of the main body 351 away from the first insulating plate 310. In this embodiment, Figure 5 As shown, the cross section of the main body 351 may be in the shape of a racetrack. Of course, it can be understood that the cross section of the main body 351 may also be in the shape of a polygon, a circle, etc., which is not limited in this embodiment.

[0066] Optionally, the first fastening member 350 may be disposed on the first insulating plate 310 by welding, bonding, etc. Optionally, the first fastening member 350 may also be an integrated structure with the first insulating plate 310, which is not limited in this embodiment.

[0067] In this embodiment, Figure 4 As shown, the second fastening member 340 includes at least one hook 341. One end of the hook 341 is connected to the side of the second insulating plate 330 facing the first insulating plate 310; the other end of the hook 341 is a hook portion 342, which is used to be engaged with the main body 351.

[0068] Specifically, the hook portion 342 of each hook 341 extends into the receiving groove 352 through the insertion hole 353, and the hook portion 342 of each hook 341 abuts against the bottom of the receiving groove 352 to achieve the connection between the hook 341 and the main body 351. In this embodiment, the structures of the hook 341 and the main body 351 are relatively simple, which is convenient for processing and manufacturing.

[0069] For example, each second fastening member 340 includes two hooks 341 , which are symmetrically arranged and respectively abut against portions of the groove bottom located on both sides of the insertion hole 353 , further improving the snap-fitting effect between the hooks 341 and the main body 351 .

[0070] In this embodiment, a first guiding bevel (not shown) is provided at the opening of the plug hole 353 at one end facing away from the first insulating plate 310, and the hook portion 342 is provided with a second guiding bevel (not shown) matching the first guiding bevel. When the hook portion 342 extends into the accommodating groove 352, the first guiding bevel contacts the second guiding bevel to guide the hook portion 342.

[0071] In some optional embodiments, one end of the main body 351 away from the first insulating plate 310 abuts against the second insulating plate 330, so that the distance between the first insulating plate 310 and the second insulating plate 330 is always the height of the main body 351, so as to better control the position of the insulating part in the height direction of the battery body 100, ensure that the force on both sides is uniform when the battery cell is put into the shell, so that the cover structure is relatively flat and the warping amplitude is reduced.

[0072] In some embodiments, Figure 6 As shown, the second insulating plate 330 has a first surface (not shown) disposed toward the first insulating plate 310 and a second surface (not shown) opposite to the first surface. Figure 3 As shown, the first surface of the second insulating plate 330 is provided with a first protrusion 331. Fig. 9 As shown, a first recessed portion 332 is provided at a position corresponding to the first protrusion 331 on the second surface of the second insulating plate 330. The first protrusion 331 is provided corresponding to the negative polarity tab 200, and the first protrusion 331 is located between the connection portion 230 and the lead-out portion 210 of the tab 200. The lead-out portion 210 of the tab is accommodated in the first recessed portion 332.

[0073] In the third direction Z, the height of the negative electrode sheet is usually higher than that of the positive electrode sheet, so that the position of the lead-out portion 210 of the tab 200 of the negative electrode sheet is higher than the position of the lead-out portion 210 of the tab 200 of the positive electrode sheet. In order to further improve the flatness of the second insulating plate 330, a first recess 332 is provided on the second insulating plate 330, so that the lead-out portion 210 of the tab 200 of the negative electrode sheet is accommodated in the first recess 332 to offset the portion where the lead-out portion 210 of the tab 200 of the negative electrode sheet is higher than the lead-out portion 210 of the tab 200 of the positive electrode sheet, thereby further improving the flatness of the cover structure 300, and improving the support effect of the cover structure 300 on the battery cell body 100 and the shaping effect on the tab 200.

[0074] It should be noted that the first recessed portion 332 and the first raised portion 331 on the second insulating plate 330 may be integrally formed when manufacturing the insulating member, and this embodiment does not limit this.

[0075] Embodiment 2

[0076] The difference between this embodiment and the first embodiment lies in that the structure of the cover plate structure 300 is different.

[0077] Specifically, in this embodiment, the abutting portion 320 and the first insulating plate 310 are integrally formed, and one end of the second insulating plate 330 in the first direction X is foldably connected to the abutting portion 320. Optionally, the second insulating plate 330 and the abutting portion 320 are integrally formed, and a fold is formed at the connection between the second insulating plate 330 and the abutting portion 320 to facilitate the foldable connection between the second insulating plate 330 and the abutting portion 320.

[0078] The other structures of this embodiment are similar to the corresponding structures of the first embodiment and have similar beneficial effects, and will not be described in detail here.

[0079] Embodiment 3

[0080] The difference between this embodiment and the first embodiment is that the number of the second insulating plates 330 is different.

[0081] Specifically, two tabs 200 with opposite polarities are led out from the first end surface 120 of the battery cell body 100. The two tabs 200 are spaced apart along the second direction Y. Fig.10 As shown, two second insulating plates 330 are provided, and the second insulating plates 330 and the tabs 200 are in a one-to-one correspondence, and each second insulating plate 330 is located between the first end surface 120 of the battery cell body 100 and the connecting portion 230 of the tab 200 corresponding to the second insulating plate 330. By providing two second insulating plates 330, it can be applied to the case where the battery cell is long, so as to reduce the assembly problem caused by the manufacturing tolerance of the second insulating plates 330 and reduce the assembly difficulty.

[0082] It should be noted that each second insulating plate 330 is connected to at least one abutting portion 320 .

[0083] Optionally, when two second insulating plates 330 are provided, second fastening members 340 are provided at both ends of the second insulating plates 330 in the second direction Y to ensure the connection reliability between each second insulating plate 330 and the first insulating plate 310 .

[0084] The other structures of this embodiment are similar to the corresponding structures of the first embodiment and have similar beneficial effects, and will not be described in detail here.

[0085] Embodiment 4

[0086] The difference between this embodiment and the first embodiment is that the second insulating plate 330 is not provided with the first protrusion and the first recess, but is provided with the second protrusion and the second recess.

[0087] Specifically, the second insulating plate 330 has a first surface disposed toward the first insulating plate 310 and a second surface opposite to the first surface. A second recessed portion is disposed on the first surface of the second insulating plate 330, and a second protrusion is disposed at a position corresponding to the second recessed portion on the second surface of the second insulating plate 330. The second protrusion is disposed corresponding to the positive polarity pole tab 200, and the second protrusion is located between the lead-out portion 210 and the connection portion 230 of the pole tab 200; the connection portion 230 of the pole tab 200 is accommodated in the second recessed portion. Such an arrangement can also achieve the purpose of offsetting the portion where the lead-out portion 210 of the pole tab 200 of the negative pole sheet is higher than the lead-out portion 210 of the pole tab 200 of the positive pole sheet, further improving the flatness of the cover plate structure 300, and improving the support effect of the cover plate structure 300 on the battery body 100 and the shaping effect on the pole tab 200.

[0088] The other structures of this embodiment are similar to the corresponding structures of the first embodiment and have similar beneficial effects, and will not be described in detail here.

[0089] Embodiment 5

[0090] This embodiment provides an electrical device, including the battery cell described in any one of Embodiments 1 to 4. The electrical device provided by this embodiment has high safety and long service life.

[0091] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery cell, characterized in that: include: A battery cell, the battery cell comprising a battery cell body (100) and a tab (200), the battery cell body (100) having a first end surface (120) perpendicular to its center line (110); the tab (200) comprising a lead-out portion (210) and a bent portion (220) connected in sequence, the lead-out portion (210) being led out from the first end surface (120) of the battery cell body (100); A cover plate structure (300), the cover plate structure (300) comprising an insulating member, the insulating member comprising a first insulating plate (310) and abutting portion (320), the first insulating plate (310) having a first end in a first direction (X); the first direction (X) and a center line (110) of the battery cell body (100) are perpendicular to each other; the first end of the first insulating plate (310) is connected to the abutting portion (320), and the abutting portion (320) abuts against a first end surface (120) of the battery cell body (100); The pole lug (200) is located between the first insulating plate (310) and the first end surface (120) of the battery cell body (100); in the first direction (X), the abutment portion (320) and the bending portion (220) are respectively located on both sides of the center line (110) of the battery cell body (100).

2. The battery cell according to claim 1, characterized in that: The pole lug (200) further includes a connecting portion (230) connected to the bending portion (220); the insulating member further includes a second insulating plate (330), the second insulating plate (330) being located between the first end surface (120) of the battery cell body (100) and the connecting portion (230) of the pole lug (200), and the second insulating plate (330) is connected to the first insulating plate (310).

3. The battery cell according to claim 2, characterized in that: The abutting portion (320) and the first insulating plate (310) can be folded and connected; one end of the second insulating plate (330) and the abutting portion (320) are integrally formed, and the other end of the second insulating plate (330) and the first insulating plate (310) can be connected in a detachable manner, in an adhesive manner, or in a hot-melt manner.

4. The battery cell according to claim 2, characterized in that: The abutting portion (320) and the first insulating plate (310) are integrally formed; one end of the second insulating plate (330) and the abutting portion (320) can be folded and connected; the other end of the second insulating plate (330) and the first insulating plate (310) can be detachably connected, glued or hot-melted.

5. The battery cell according to any one of claims 2 to 4, characterized in that: A second fastening piece (340) is provided at one end of the second insulating plate (330) that is detachably connected to the first insulating plate (310), and a first fastening piece (350) is provided at a position of the first insulating plate (310) corresponding to the second fastening piece (340), and the first insulating plate (310) and the second insulating plate (330) are connected by means of a snap-fitting manner of the first fastening piece (350) and the second fastening piece (340).

6. The battery cell according to claim 5, characterized in that: The first buckling member (350) comprises a main body (351), the main body (351) being connected to a side of the first insulating plate (310) facing the second insulating plate (330); the main body (351) is provided with a receiving groove (352), the bottom of the receiving groove (352) is provided with a plug hole (353), and the plug hole (353) extends and passes through an end surface of the main body (351) away from the first insulating plate (310); The second fastening member (340) comprises at least one hook (341), one end of the hook (341) is connected to a side of the second insulating plate (330) facing the first insulating plate (310); the other end of the hook (341) is a hook portion (342); The hook portion (342) of each of the hooks (341) extends into the receiving groove (352) through the plug hole (353), and the hook portion (342) of each of the hooks (341) abuts against the bottom of the receiving groove (352), and the main body (351) abuts against the second insulating plate (330).

7. The battery cell according to any one of claims 2 to 4, characterized in that: The second insulating plate (330) abuts against the first end surface (120) of the battery cell body (100).

8. The battery cell according to any one of claims 2 to 4, characterized in that: The first end surface (120) of the battery cell body (100) leads to two pole lugs (200) with opposite polarities, and the two pole lugs (200) are arranged at intervals along a second direction (Y), and the second direction (Y) and the first direction (X) are perpendicular to each other; two second insulating plates (330) are provided, and the second insulating plates (330) and the pole lugs (200) are in a one-to-one correspondence.

9. The battery cell according to any one of claims 2 to 4, characterized in that: The second insulating plate (330) comprises a first surface arranged toward the first insulating plate (310) and a second surface opposite to the first surface; the first surface of the second insulating plate (330) is provided with a first protrusion (331); the second surface of the second insulating plate (330) is provided with a first recess (332) at a position corresponding to the first protrusion (331); the first protrusion (331) is arranged corresponding to the negative polarity of the pole lug (200), and the first protrusion (331) is located between the connecting portion (230) and the lead-out portion (210) of the pole lug (200); the lead-out portion (210) of the pole lug (200) is accommodated in the first recess (332); Alternatively, a second recessed portion is provided on the first surface of the second insulating plate (330), and a second raised portion is provided on the second surface of the second insulating plate (330) at a position corresponding to the second recessed portion, the second raised portion is provided corresponding to the positive polarity of the pole lug (200), and the second raised portion is located between the lead-out portion (210) and the connecting portion (230) of the pole lug (200); the connecting portion (230) of the pole lug (200) is accommodated in the second recessed portion.

10. An electrical device, characterized in that: A battery cell comprising the battery cell according to any one of claims 1 to 9.

Images