Battery

Abstract

The invention discloses a battery, and relates to the technical field of electronic products. The battery comprises a battery cell, at least two lifting lugs and a protection plate, the battery cell is provided with a groove, the bottom surface of the groove is a first surface of the battery cell provided with a pole along one side of the first direction, and the groove is communicated to the first end surface; one end of the lifting lug is welded on the bottom surface of the groove, and the other end extends out of the battery cell; the protection plate is located in the groove and arranged on the side, away from the bottom face of the groove, of the lifting lug. The projection of the protection plate towards the bottom face of the groove is completely located in the groove, and the projection of the protection plate towards the first side wall of the groove is completely located in the first side wall. Welding can be carried out without erecting the battery cell, the technological process is simplified, the equipment requirement is lowered, the welding speed and the production yield can be greatly improved, and the method is particularly suitable for thin battery cells; one end of the lifting lug is welded to the bottom face of the groove, a larger welding area can be obtained, and the welding strength is improved.

Description

Technical Field

[0001] This invention relates to the field of electronic product technology, and more specifically, to a battery. Background Technology

[0002] Currently, although steel-cased batteries can be disassembled and replaced, existing fixing methods are generally not strong enough or take up too much space, and cannot meet the reliability requirements during repeated disassembly and reassembly.

[0003] Specifically, existing lug-type fixing solutions typically weld the lugs to the side of the battery cell. This design requires the battery cell to be placed vertically for welding, limiting operational space and increasing operational difficulty. Especially for thin cells, the narrow side welding area results in low welding yield and poor consistency. Furthermore, the limited welding area leads to lower weld strength between the lug and the cell, making the weld prone to detachment during repeated disassembly and reassembly. Additionally, the protection board requires extra space at the battery head, hindering the compact design of the battery's internal space.

[0004] In summary, how to provide a battery that simplifies the welding difficulty of the lifting lugs, improves the welding strength of the lifting lugs, and increases the volumetric energy density of the battery is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a battery in which a groove is provided on the first surface of the cell and the lifting lug and the protective plate are placed in the groove, which can effectively simplify the welding difficulty of the lifting lug, improve the welding strength of the lifting lug and improve the volumetric energy density of the battery.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A battery includes a battery cell, at least two lifting lugs, and a protection board;

[0008] The battery cell is provided with a groove, the bottom surface of which is the first surface of the battery cell on which the electrode post is provided along a first direction. Along the second direction of the battery cell, the groove connects to the first end face. Along the third direction of the battery cell, the groove penetrates at least one side of the battery cell. The dimension of the bottom surface of the groove along the second direction of the battery cell is greater than the thickness dimension of the battery cell along the first direction.

[0009] One end of the lifting lug is welded to the bottom surface of the groove, and the other end extends out of the battery cell.

[0010] The protective plate is located in the groove and is disposed on the side of the lifting lug away from the bottom surface of the groove; the projection of the protective plate onto the bottom surface of the groove is completely located in the groove, and the projection of the protective plate onto the first sidewall of the groove is completely located in the first sidewall, which is a sidewall of the groove disposed away from the first end face along the second direction.

[0011] Optionally, it also includes a first reinforcing metal sheet and a second reinforcing metal sheet. The lifting lug includes a first lifting lug and a second lifting lug. The first reinforcing metal sheet and the second reinforcing metal sheet are both attached to the bottom surface of the groove and along a third direction of the battery cell. The first reinforcing metal sheet is located on one side of the electrode post, and the second reinforcing metal sheet is located on the other side of the electrode post.

[0012] The first lifting lug is welded to the first reinforcing metal sheet, and the second lifting lug is welded to the second reinforcing metal sheet.

[0013] Optionally, the first lifting lug includes a first welded connection part, a first adhesive part, and a first fixing part connected in sequence. The first welded connection part is welded to the first reinforcing metal sheet, and the first adhesive part is bonded to a third-direction side or the first end face of the battery cell.

[0014] The second lifting lug includes a second welded connection part, a second adhesive part, and a second fixing part connected in sequence. The second welded connection part is welded to the second reinforcing metal sheet, and the second adhesive part is bonded to a third-direction side or the first end face of the battery cell.

[0015] Optionally, the first fixing part is provided with a first fixing hole or a first slot, the opening of the first slot penetrates at least one side of the first fixing part, and both the first fixing hole and the first slot penetrate the thickness direction of the first fixing part.

[0016] The second fixing part is provided with a second fixing hole or a second slot. The opening of the second slot penetrates at least one side of the second fixing part, and both the second fixing hole and the second slot penetrate the thickness direction of the second fixing part.

[0017] Optionally, along the second direction of the battery cell, a flange protrusion is provided on the second end face of the battery cell opposite to the first end face, and the flange protrusion is used to position the battery installation position.

[0018] Optionally, it further includes a first adapter metal sheet and a second adapter metal sheet, one end of the first adapter metal sheet being welded to the pole and the other end being electrically connected to the protection plate; one end of the second adapter metal sheet being welded to the second reinforcing metal sheet and the other end being electrically connected to the protection plate;

[0019] Along a third direction of the battery cell, the second adapter metal piece is positioned closer to the electrode post than the second lug.

[0020] Optionally, both the first and second adapter metal sheets include a first folded layer, a second folded layer, and a third folded layer connected in sequence; the first folded layer, the second folded layer, and the third folded layer may extend in the same direction, be arranged in a Z-shape, or be stacked along the first direction of the battery cell;

[0021] The first folded layer of the first adapter metal sheet is connected to the pole post, and the third folded layer is connected to the protective plate; the first folded layer of the second adapter metal sheet is connected to the second reinforcing metal sheet, and the third folded layer is connected to the protective plate.

[0022] Optionally, both the first and second adapter metal sheets include a welded connection section and a bent section connected in sequence. The welded connection section is welded to the pole or the second reinforcing metal sheet. The bent section is bent toward the welded connection section and stacked on the side of the welded connection section away from the bottom surface of the groove. Along the first direction of the battery cell, the side of the bent section away from the welded connection section is connected to the protection plate.

[0023] Optionally, the depth of the groove along the first direction of the battery cell is B, the thickness of the protective plate is D, the dimension of the first or second adapter metal sheet in the first direction of the battery cell when the first or second adapter metal sheet is stacked is E, and the protrusion height of the electrode post in the first direction of the battery cell is F; and the depth B of the groove is greater than or equal to the sum of the thickness D of the protective plate, the dimension E of the first or second adapter metal sheet, and the protrusion height F of the electrode post.

[0024] The dimension of the contact portion between the first adhesive portion or the second adhesive portion and the battery cell along the first direction of the battery cell is G, where G > 1 mm, the thickness of the battery cell is A, and the depth B of the groove is less than or equal to the difference between the thickness A of the battery cell and the dimension G of the first adhesive portion or the second adhesive portion.

[0025] Optionally, the dimension of the device disposed on the protection plate in the first direction of the cell is C, and C is less than the sum of the dimension E of the first or second adapter metal sheet and the protrusion height F of the pole post.

[0026] The battery provided by the present invention includes a battery cell, at least two lifting lugs, and a protection plate. The battery cell is provided with a groove, the bottom surface of which is a first surface on which the electrode post is provided along a first direction. Along a second direction of the battery cell, the groove connects to a first end face. Along a third direction of the battery cell, the groove penetrates at least one side of the battery cell. One end of the lifting lug is welded to the bottom surface of the groove, and the other end extends out of the battery cell. The protection plate is located in the groove and is provided on the side of the lifting lug away from the bottom surface of the groove. The dimension of the bottom surface of the groove along the second direction of the battery cell is greater than the thickness dimension of the battery cell along the first direction. The projection of the protection plate onto the bottom surface of the groove is completely located within the groove, and the projection of the protection plate onto the first sidewall of the groove is completely located within the first sidewall, which is a sidewall of the groove facing the first end face along the second direction.

[0027] The beneficial effects of the battery provided in this application are as follows:

[0028] 1) One end of the lifting lug is welded to the bottom of the groove. Compared with the existing technology of welding the lifting lug to the side of the battery cell, the battery cell does not need to be vertical to be welded, which simplifies the process, reduces equipment requirements, and can greatly improve welding speed and production yield, especially suitable for thin battery cells.

[0029] 2) For thin battery cells, compared with the prior art of welding the lifting lug to the side of the battery cell, this application welds one end of the lifting lug to the bottom surface of the groove, which can obtain a larger welding area and improve the welding strength.

[0030] 3) The protection board is completely located in the groove, which will not take up extra space at the battery head and eliminates the protruding part of the protection board, making the overall battery structure more compact, the volume utilization rate higher, and effectively improving the volumetric energy density of the battery. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 This is an exploded schematic diagram of the battery provided by the present invention.

[0033] Figure 2 This is a rear view schematic diagram of the battery provided by the present invention.

[0034] Figure 3 This is a side view of the battery provided by the present invention.

[0035] Figure 4 This is a front view schematic diagram of the battery provided by the present invention.

[0036] Figure 5 This is an exploded schematic diagram of the battery cell provided by the present invention.

[0037] Figure 6 for Figure 5 A front view of the battery.

[0038] Figure 7 This is a schematic diagram showing the connection between the lifting lug and the battery cell in the battery provided by the present invention.

[0039] Figure 8 for Figure 7 A magnified view of part Q in the middle.

[0040] Figure 9 for Figure 7 A side view of the battery.

[0041] Figure 10 for Figure 9 A magnified view of part M in the middle.

[0042] Figure 11 This is a schematic diagram showing the connection between the protection board and the battery cell;

[0043] Figure 12 for Figure 11 A front view diagram of the protection board installed on the battery cell.

[0044] Figure 13 This is a schematic diagram of the structure of the first transition metal sheet, which is a three-fold metal sheet.

[0045] Figure 14 for Figure 13 A schematic diagram of the structure in which the first adapter metal piece is in a folded state.

[0046] Figure 15 This is a schematic diagram of the structure connecting the three-fold metal sheet to the protective plate.

[0047] Figure 16 for Figure 15 A schematic diagram of the assembly process of the protection board and the battery cell.

[0048] Figure 17 for Figure 16 A schematic diagram of the cross-section of the protection board installed in the groove of the battery cell.

[0049] Figure 18 This is a schematic diagram illustrating the thickness dimensions of the battery provided by the present invention.

[0050] Figure 19 This is a front view of a specific embodiment of the first lifting lug.

[0051] Figure 20This is a reverse schematic diagram of a specific embodiment of the first lifting lug.

[0052] Figure 21 This is a front view of a specific embodiment of the second lifting lug.

[0053] Figure 22 This is a reverse schematic diagram of a specific embodiment of the second lifting lug.

[0054] Figure 23 This is a rear view diagram of a battery cell with irregularly shaped lifting lugs installed.

[0055] Figure 24 for Figure 23 A side view of the battery cell.

[0056] Figure 25 for Figure 23 A front view of the battery cell.

[0057] Figure 26 This is a structural schematic diagram of a specific embodiment of the irregular-shaped lifting lug.

[0058] Figure 27 This is a structural schematic diagram of a specific embodiment of the irregular-shaped lifting lug.

[0059] Figure 28 This is a structural schematic diagram of a specific embodiment of the irregular-shaped lifting lug.

[0060] Figures 1-28 middle:

[0061] 1-Battery cell, 11-Groove, 12-Second surface, 13-First end face, 14-Injection hole, 15-First surface;

[0062] 2-Lifting lug, 21-First lifting lug, 211-First welded connection, 212-First adhesive part, 213-First fixing part, 2131-First fixing hole, 2132-First slot, 22-Second lifting lug, 221-Second welded connection, 222-Second adhesive part, 223-Second fixing part, 2231-Second fixing hole;

[0063] 3-Pole Post;

[0064] 4-Protective board, 41-Double-sided adhesive;

[0065] 51 - First reinforcing metal sheet; 52 - Second reinforcing metal sheet;

[0066] 6-Flange protrusion;

[0067] 71-First connecting metal sheet, 72-Second connecting metal sheet, 711-First folded layer, 712-Second folded layer, 713-Third folded layer;

[0068] B - Depth of the groove along the first direction of the battery cell; D - Thickness of the protection plate; E - Dimension of the first or second adapter metal sheet in the first direction of the battery cell when they are stacked; G - Dimension of the contact portion between the first or second adhesive part and the battery cell along the first direction of the battery cell; A - Thickness of the battery cell; C - Dimension of the device on the protection plate in the first direction of the battery cell; F - Protrusion height of the pole post. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] The core of this invention is to provide a battery in which a groove is provided on the first surface of the cell, and the lifting lug and the protective plate are placed in the groove, which can effectively simplify the welding difficulty of the lifting lug, improve the welding strength of the lifting lug, and increase the volumetric energy density of the battery.

[0071] Example 1

[0072] This specific embodiment discloses a battery, which includes a battery cell 1, at least two lifting lugs 2, and a protection board 4; the battery cell 1 is provided with a groove 11, such as... Figure 1 , Figure 5 As shown, the bottom surface of the groove 11 is the first surface 15 of the cell 1 along the first direction where the electrode post 3 is disposed; along the second direction of the cell 1, the groove 11 connects to the first end face 13, and along the third direction of the cell 1, the groove penetrates at least one side of the cell 1; and the dimension of the bottom surface of the groove 11 along the second direction of the cell is greater than the thickness dimension of the cell 1 along the first direction; one end of the lifting lug 2 is welded to the bottom surface of the groove 11, and the other end extends out of the cell 1; the protective plate 4 is located in the groove 11 and disposed on the side of the lifting lug 2 away from the bottom surface of the groove 11; the projection of the protective plate 4 onto the bottom surface of the groove 11 is completely located in the groove 11, and the projection of the protective plate 4 onto the first sidewall of the groove 11 is completely located in the first sidewall, which is the sidewall of the groove 11 disposed away from the first end face 13 along the second direction.

[0073] like Figure 1 , Figure 5 As shown, one side along the first direction of the cell 1 is the second surface 12, and the opening of the groove 11 penetrates the second surface 12.

[0074] It should be noted that the first orientation of cell 1 mentioned in this application is... Figure 3 The direction shown by the Z-axis is the second direction of cell 1. Figure 2 , Figure 3 , Figure 4 The direction indicated by the Y-axis is the second direction, which is perpendicular to the first direction; the third direction of cell 1 is... Figure 2 , Figure 4 The direction indicated by the X-axis is a third direction that is perpendicular to both the first and second directions. The first surface 15 mentioned in this application is... Figure 1 The battery cell 1 shown has a surface with a terminal post 3 in the first direction, and the first surface 15 is also provided with a liquid injection hole 14; the first end face 13 mentioned in this application is... Figure 3 The end face of the second direction side of the battery cell 1 shown.

[0075] like Figure 4 As shown, one of the lugs 2 extends from the first end face 13 of the battery cell 1, and the other lug 21 extends from one side of the battery cell 1 in a first direction. In this case, the groove 11 can be positioned as follows: Figure 4 As shown, the opening of the groove 11 penetrates the first end face 13 and one of the sides of the cell 1 in the first direction. When the two lugs 2 extend from two different sides of the cell 1 in the first direction, the opening of the groove 11 must penetrate the two sides of the cell 1 in the first direction along the third direction of the cell 1.

[0076] The installation location and quantity of lifting lug 2 need to be determined based on the actual situation. Figure 2 , Figure 4 This is just one example.

[0077] In this specific embodiment, the projection of the protection plate 4 onto the bottom surface of the groove 11 is completely located within the groove 11, and the projection of the protection plate 4 onto the first end face 13 is completely located within the first end face 13, ensuring that the entire protection plate 4 is completely located within the groove 11. In the first direction, length direction, and width direction of the battery cell 1, the protection plate 4 will not exceed the battery cell 1, thus avoiding the protection plate 4 from occupying additional head space of the battery cell 1.

[0078] In this specific embodiment, one end of the lifting lug 2 of the battery is welded to the bottom surface of the groove 11. Compared with the prior art where the lifting lug 2 is welded to the side of the cell 1, the cell 1 does not need to be vertical for welding, simplifying the process, reducing equipment requirements, and significantly improving welding speed and production yield, especially suitable for thin cells 1. Furthermore, for thin cells 1, compared with the prior art where the lifting lug 2 is welded to the side of the cell 1, this application welds one end of the lifting lug 2 to the bottom surface of the groove 11, which can obtain a larger welding area and improve welding strength. In addition, the protection plate 4 is completely located within the groove 11, without occupying additional space at the battery head, and the protruding part of the protection plate 4 is eliminated, making the overall battery structure more compact, with higher volume utilization, and effectively improving the volumetric energy density of the battery.

[0079] Example 2

[0080] In this specific embodiment, the battery further includes a first reinforcing metal sheet 51 and a second reinforcing metal sheet 52. The lifting lug 2 includes a first lifting lug 21 and a second lifting lug 22. The first reinforcing metal sheet 51 and the second reinforcing metal sheet 52 are both attached to the bottom surface of the groove 11 and along a third direction of the cell 1, such as... Figure 7 , Figure 8 As shown, the first reinforcing metal sheet 51 is located on one side of the pole post 3, and the second reinforcing metal sheet 52 is located on the other side of the pole post 3; the first lifting lug 21 is welded to the first reinforcing metal sheet 51, and the second lifting lug 22 is welded to the second reinforcing metal sheet 52.

[0081] In this specific embodiment, both the first reinforcing metal sheet 51 and the second reinforcing metal sheet 52 can be steel sheets. Of course, they can also be metal sheets of other materials that meet the requirements. The specific choice depends on the actual situation and will not be elaborated here.

[0082] Since the casing of the battery cell 1 is relatively thin, directly welding the lifting lug 2 to the bottom surface of the groove 11 results in low welding strength. Therefore, in this specific embodiment, by setting a first reinforcing metal sheet 51 and a second reinforcing metal sheet 52, the first reinforcing metal sheet 51 and the second reinforcing metal sheet 52 are first welded to the bottom surface of the groove 11, and then the first lifting lug 21 is welded to the first reinforcing metal sheet 51, and the second lifting lug 22 is welded to the second reinforcing metal sheet 52. This can effectively improve the welding strength between the first lifting lug 21 and the second lifting lug 22, and also increase the welding area and improve welding reliability.

[0083] Example 3

[0084] Based on the above embodiments, such as Figure 18 , Figure 19 As shown, the first lifting lug 21 includes a first welded connection portion 211, a first adhesive portion 212, and a first fixing portion 213 connected in sequence, as follows: Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, the first welded connection 211 is welded to the first reinforcing metal sheet 51, and the first adhesive part 212 is adhesive to one side or the first end face 13 of the battery cell 1 in a third direction.

[0085] like Figure 20 , Figure 21 As shown, the second lifting lug 22 includes a second welded connection portion 221, a second adhesive portion 222, and a second fixing portion 223 connected in sequence, as follows: Figure 7 , Figure 8 , Figure 9 , Figure 10As shown, the second welded connection 221 is welded to the second reinforcing metal sheet 52, and the second adhesive part 222 is adhesive to one side or the first end face 13 of the battery cell 1 in a third direction.

[0086] In this specific embodiment, the first adhesive part 212 and the battery cell 1, and the second adhesive part 222 and the battery cell 1 can be bonded together by double-sided tape 41 or glue.

[0087] In this specific embodiment, each lifting lug 2 is fixed by a combination of welding and bonding, which effectively improves the fixing reliability of the lifting lug 2 and achieves the dual guarantee of welding and bonding.

[0088] like Figure 19 , Figure 20 , Figure 21 , Figure 22 As shown, the first fixing part 213 is provided with a first fixing hole 2131, and the first fixing hole 2131 penetrates the thickness direction of the first fixing part 213; the second fixing part 223 is provided with a second fixing hole 2231, and the second fixing hole 2231 penetrates the thickness direction of the second fixing part 223.

[0089] Alternatively, the lug 2 can be set as an irregular lug 2, and the shape of the irregular lug 2 can be as follows: Figure 26 , Figure 27 , Figure 28 As shown; Figure 23 , Figure 24 , Figure 25 As shown, the first fixing part 213 is provided with a first slot 2132, the opening of the first slot 2132 penetrates at least one side of the first fixing part 213, and the first slot 2132 penetrates the thickness direction of the first fixing part 213; the second fixing part 223 is provided with a second slot, the opening of the second slot penetrates at least one side of the second fixing part 223, and the second slot penetrates the thickness direction of the second fixing part 223.

[0090] like Figure 2 , Figure 4 As shown, along the second direction of the cell 1, a flange protrusion 6 is provided on the second end face of the cell 1 away from the first end face 13. The flange protrusion 6 is used to position the battery installation position.

[0091] In this specific embodiment, by setting two lifting lugs 2 and one flange protrusion 6, and the two lifting lugs 2 and one flange protrusion 6 are arranged in a triangular distribution, the battery can be stably fixed.

[0092] Example 4

[0093] In this specific embodiment, the battery also includes a first adapter metal sheet 71 and a second adapter metal sheet 72. One end of the first adapter metal sheet 71 is welded to the terminal post 3, and the other end is electrically connected to the protection plate 4. One end of the second adapter metal sheet 72 is welded to the second reinforcing metal sheet 52, and the other end is electrically connected to the protection plate 4. Along the third direction of the cell 1, the second adapter metal sheet 72 is positioned closer to the terminal post 3 than the second lug 22.

[0094] like Figure 5 , Figure 6 As shown, along a third direction of the cell 1, the first reinforcing metal sheet 51 is located on one side of the terminal post 3, the first connecting metal sheet 71 is connected to the terminal post 3, and the second reinforcing metal sheet 52 is located on the other side of the terminal post 3. One end of the second connecting metal sheet 72 is welded to the side of the second reinforcing metal sheet 52 closest to the terminal post 3. Figure 11 As shown, the portion of the first adapter metal piece 71 extending out of the groove 11 is welded to the protective plate 4, and the portion of the second adapter metal piece 72 extending out of the groove 11 is welded to the protective plate 4. The first adapter metal piece 71 and the second adapter metal piece 72 are bent, and the circuit board needs to be installed into the groove 11. After the circuit board is installed, the battery... Figure 12 As shown.

[0095] The first adapter metal piece 71 and the second adapter metal piece 72 can be nickel sheets or nickel-plated copper sheets, depending on the actual situation, which will not be elaborated here.

[0096] In this specific embodiment, the electrical connection between the circuit board and the positive and negative tabs can be achieved by setting the first adapter metal piece 71 and the second adapter metal piece 72.

[0097] The first adapter metal plate 71 and the second adapter metal plate 72 can be as follows: Figure 5 As shown, during the installation of the protective plate 4 into the groove 11, the first transition metal sheet 71 and the second transition metal sheet 72 only need to be bent on one side; of course, the first transition metal sheet 71 and the second transition metal sheet 72 can also be as follows: Figure 13 , Figure 14 The three-fold metal sheet shown.

[0098] Specifically, both the first adapter metal sheet 71 and the second adapter metal sheet 72 include a first folded layer 711, a second folded layer 712, and a third folded layer 713 connected in sequence; the first folded layer 711, the second folded layer 712, and the third folded layer 713 can be configured as follows: Figure 13 Extending in the same direction as shown, or as Figure 14 The arrangement shown is in a Z-shape, or as... Figure 17 As shown, they are stacked along the first direction of cell 1; as Figure 16 As shown, the first folded layer 711 of the first adapter metal sheet 71 is connected to the pole post 3, as... Figure 15 As shown, the third folded layer 713 is connected to the protective plate 4; the first folded layer 711 of the second transition metal sheet 72 is connected to the second reinforcing metal sheet 52, and the third folded layer 713 is connected to the protective plate 4.

[0099] In this specific embodiment, by setting the first adapter metal sheet 71 and the second adapter metal sheet 72 as tri-fold metal sheets, the tri-fold metal sheets are easier to fold during the actual assembly process, which can reduce the installation difficulty of the protection plate 4; and during the welding connection between the first adapter metal sheet 71 and the second adapter metal sheet 72 and the protection plate 4, a larger operating space can be provided.

[0100] Alternatively, both the first adapter metal sheet 71 and the second adapter metal sheet 72 may include a welded connection section and a bent section connected in sequence. The welded connection section is welded to the pole post 3 or the second reinforcing metal sheet 52. The bent section is bent toward the welded connection section and stacked on the side of the welded connection section away from the bottom surface of the groove 11. Along the first direction of the cell 1, the side of the bent section away from the welded connection section is connected to the protection plate 4.

[0101] The first adapter metal piece 71 and the second adapter metal piece 72 can be bent only once to achieve the installation and fixation of the protection plate 4, which simplifies the installation steps of the protection plate 4.

[0102] Example 5

[0103] In this specific embodiment, the depth of the groove 11 along the first direction of the battery cell 1 is B, the thickness of the protective plate 4 is D, the dimension of the first adapter metal sheet 71 or the second adapter metal sheet 72 in the first direction of the battery cell 1 when they are stacked is E, and the protrusion height of the pole post 3 in the first direction of the battery cell 1 is F; and the depth B of the groove 11 is greater than or equal to the sum of the thickness D of the protective plate 4, the dimension E of the first adapter metal sheet 71 or the second adapter metal sheet 72, and the protrusion height F of the pole post 3; the dimension of the contact portion between the first adhesive part 212 or the second adhesive part 222 and the battery cell 1 along the first direction of the battery cell 1 is G, G > 1mm, to ensure the reliability of the adhesive part of the hanging lug 2; the thickness of the battery cell 1 is A, and the depth B of the groove 11 is less than or equal to the difference between the thickness A of the battery cell 1 and the dimension G of the first adhesive part 212 or the second adhesive part 222, D+E+F≤B≤AG.

[0104] The size of the device on the protection board 4 in the first direction of the cell 1 is C, and C is less than the sum of the size E of the first transition metal piece 71 or the second transition metal piece 72 and the protrusion height F of the pole post 3, so as to prevent the protection board 4 from being pushed up by the device on the protection board 4.

[0105] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this invention is within the scope of protection of this invention and will not be elaborated upon here.

[0106] The battery provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A battery, characterized in that, Includes battery cell (1), at least two lifting lugs (2) and protection board (4); The battery cell (1) is provided with a groove (11), the bottom surface of the groove (11) is the first surface (15) of the battery cell (1) along the first direction where the electrode post (3) is provided, the groove (11) is connected to the first end face (13) along the second direction of the battery cell (1), and the groove (11) penetrates at least one side of the battery cell (1) along the third direction of the battery cell (1); and the dimension of the bottom surface of the groove (11) along the second direction of the battery cell is greater than the thickness dimension of the battery cell (1) along the first direction; One end of the lifting lug (2) is welded to the bottom surface of the groove (11), and the other end extends out of the battery cell (1); The protective plate (4) is located in the groove (11) and is disposed on the side of the lifting lug (2) away from the bottom surface of the groove (11); the projection of the protective plate (4) onto the bottom surface of the groove (11) is completely located in the groove (11), and the projection of the protective plate (4) onto the first sidewall of the groove (11) is completely located in the first sidewall, which is the sidewall of the groove (11) disposed away from the first end face (13) along the second direction.

2. The battery according to claim 1, characterized in that, It also includes a first reinforcing metal sheet (51) and a second reinforcing metal sheet (52). The lug (2) includes a first lug (21) and a second lug (22). The first reinforcing metal sheet (51) and the second reinforcing metal sheet (52) are both attached to the bottom surface of the groove (11) and along the third direction of the cell (1). The first reinforcing metal sheet (51) is located on one side of the pole post (3), and the second reinforcing metal sheet (52) is located on the other side of the pole post (3). The first lifting lug (21) is welded to the first reinforcing metal sheet (51), and the second lifting lug (22) is welded to the second reinforcing metal sheet (52).

3. The battery according to claim 2, characterized in that, The first lifting lug (21) includes a first welded connection part (211), a first adhesive part (212) and a first fixing part (213) connected in sequence. The first welded connection part (211) is welded to the first reinforcing metal sheet (51), and the first adhesive part (212) is bonded to a third side or the first end face (13) of the battery cell (1). The second lug (22) includes a second welded connection part (221), a second adhesive part (222) and a second fixing part (223) connected in sequence. The second welded connection part (221) is welded to the second reinforcing metal sheet (52), and the second adhesive part (222) is bonded to a third side or the first end face (13) of the battery cell (1).

4. The battery according to claim 3, characterized in that, The first fixing part (213) is provided with a first fixing hole (2131) or a first slot (2132). The opening of the first slot (2132) penetrates at least one side of the first fixing part (213), and both the first fixing hole (2131) and the first slot (2132) penetrate the thickness direction of the first fixing part (213). The second fixing part (223) is provided with a second fixing hole (2231) or a second slot. The opening of the second slot penetrates at least one side of the second fixing part (223), and both the second fixing hole (2231) and the second slot penetrate the thickness direction of the second fixing part (223).

5. The battery according to any one of claims 1-4, characterized in that, Along the second direction of the battery cell (1), a flange protrusion (6) is provided on the second end face of the battery cell (1) away from the first end face (13), and the flange protrusion (6) is used to position the battery installation position.

6. The battery according to any one of claims 2-4, characterized in that, It also includes a first adapter metal sheet (71) and a second adapter metal sheet (72). One end of the first adapter metal sheet (71) is welded to the pole post (3), and the other end is electrically connected to the protection plate (4). One end of the second adapter metal sheet (72) is welded to the second reinforcing metal sheet (52), and the other end is electrically connected to the protection plate (4). Along a third direction of the battery cell (1), the second adapter metal piece (72) is positioned closer to the pole post (3) than the second lug (22).

7. The battery according to claim 6, characterized in that, Both the first adapter metal sheet (71) and the second adapter metal sheet (72) include a first folded layer (711), a second folded layer (712), and a third folded layer (713) connected in sequence; the first folded layer (711), the second folded layer (712), and the third folded layer (713) may extend in the same direction or be arranged in a Z-shape or stacked along the first direction of the battery cell (1); The first folded layer (711) of the first adapter metal sheet (71) is connected to the pole post (3), and the third folded layer (713) is connected to the protective plate (4); the first folded layer (711) of the second adapter metal sheet (72) is connected to the second reinforcing metal sheet (52), and the third folded layer (713) is connected to the protective plate (4).

8. The battery according to claim 6, characterized in that, Both the first adapter metal sheet (71) and the second adapter metal sheet (72) include a welded connection section and a bent section connected in sequence. The welded connection section is welded to the pole (3) or the second reinforcing metal sheet (52). The bent section is bent toward the welded connection section and stacked on the side of the welded connection section away from the bottom surface of the groove (11). Along the first direction of the battery cell (1), the side of the bent section away from the welded connection section is connected to the protection plate (4).

9. The battery according to claim 6, characterized in that, The depth of the groove (11) along the first direction of the battery cell (1) is B, the thickness of the protective plate (4) is D, the dimension of the first adapter metal sheet (71) or the second adapter metal sheet (72) in the first direction of the battery cell (1) when they are stacked is E, and the protrusion height of the pole post (3) in the first direction of the battery cell (1) is F; and the depth B of the groove (11) is greater than or equal to the sum of the thickness D of the protective plate (4), the dimension E of the first adapter metal sheet (71) or the second adapter metal sheet (72) and the protrusion height F of the pole post (3); The dimension of the contact portion of the first adhesive part (212) or the second adhesive part (222) with the battery cell (1) along the first direction of the battery cell (1) is G, where G > 1 mm. The thickness of the battery cell (1) is A. The depth B of the groove (11) is less than or equal to the difference between the thickness A of the battery cell (1) and the dimension G of the first adhesive part (212) or the second adhesive part (222).

10. The battery according to claim 9, characterized in that, The size of the device on the protection plate (4) in the first direction of the cell (1) is C, and C is smaller than the sum of the size E of the first adapter metal sheet (71) or the second adapter metal sheet (72) and the protrusion height F of the pole post (3).

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