battery

Abstract

The utility model relates to new energy technology field discloses a kind of batteries, battery includes: shell, electric core, pole; Electric core includes electric core body and tab, adapter piece is electrically connected between pole and tab, tab includes the first tab part being connected with electric core body and the second tab part being away from electric core body, first tab part and second tab part are respectively located the two sides of adapter piece along first direction;Second tab part is welded with adapter piece and forms weld mark;Along first direction, the shortest distance between the surface of the side of first wall towards adapter piece and the surface of the side of first wall towards adapter piece is a, the thickness of tab is m, satisfy: 0.5mm≤a-m≤9mm.The battery provided by the utility model ensures that tab has enough accommodating space between adapter piece and first wall, prevents the situation that first wall extrudes tab due to insufficient space occurs.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, specifically to a battery. Background Technology

[0002] When welding the tabs to the adapter plates in a battery, the tabs are usually welded to the lower surface of the adapter plate. This results in a large required height space between the adapter plate and the battery cell, leading to low battery space utilization and affecting battery energy density. To further improve space utilization in the height direction of the battery, the connection method can be set so that the tabs cover the upper surface of the adapter plate, and the upper surface of the adapter plate is welded to the tabs. The tabs are then housed between the cover plate and the adapter plate. However, this connection method is prone to causing the tabs to tear, affecting their current carrying capacity. Excessive internal resistance of the tabs leads to excessive heat generation during battery charging and discharging, posing a significant safety risk. Utility Model Content

[0003] In view of this, the present invention provides a battery to solve the problem that the tabs are easily torn when housed between the cover plate and the adapter plate.

[0004] This utility model provides a battery, comprising:

[0005] The housing includes a first wall on which a pole post is disposed;

[0006] A battery cell is disposed within a housing. The battery cell includes a battery cell body and a tab. The tab extends from at least one end of the battery cell body along a first direction and is electrically connected to the battery cell body.

[0007] The pole is suitable for electrical connection with the tab;

[0008] The adapter is electrically connected between the terminal and the tab. The tab includes a first tab portion connected to the battery cell body and a second tab portion away from the battery cell body. The first tab portion and the second tab portion are respectively located on both sides of the adapter along the first direction, and the first tab portion and the second tab portion are connected via a bend.

[0009] The second electrode ear is welded to the adapter piece and a solder mark is formed;

[0010] Along the first direction, the shortest distance between the surface of the adapter piece facing the first wall and the surface of the first wall facing the adapter piece is a, and the thickness of the tab is m, satisfying: 0.5mm≤am≤9mm.

[0011] Beneficial Effects: This embodiment limits the lower limit of am to prevent am from being too small, thereby ensuring sufficient space between the tab and the first wall. This prevents the first wall from squeezing the tab due to insufficient space, avoiding tearing caused by compression, and thus ensuring the tab's current carrying capacity and meeting its current requirements. Simultaneously, by limiting the lower limit of am, this embodiment ensures the tab's current carrying capacity, preventing excessive heat generation from the tab during high-rate fast charging, avoiding excessive internal resistance, and reducing safety risks such as battery thermal runaway, thus ensuring the overall charge / discharge rate of the battery. Furthermore, by limiting the upper limit of am to prevent am from being too large, it ensures that there is no excessive compression between the tab and the first wall while maintaining contact. This allows heat generated by the tab to be conducted to the outside of the battery through the first wall, which is beneficial for battery heat dissipation and ensures efficient space utilization in the height direction, thereby guaranteeing energy density. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the battery of this utility model;

[0014] Figure 2 This is a schematic diagram showing the disassembled state of the battery of this utility model;

[0015] Figure 3 This is a top view of the battery of this utility model;

[0016] Figure 4 for Figure 3 Schematic diagram of the BB section;

[0017] Figure 5 This is an exploded view of the battery of this utility model from a cross-sectional perspective;

[0018] Figure 6 for Figure 4 A magnified view of a portion of the image;

[0019] Figure 7 This is a schematic diagram of the fit between the insulating component and the plate body of the battery of this utility model from a cross-sectional perspective;

[0020] Figure 8 This is a cross-sectional view of the battery of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Shell; 11. First shell wall; 12. Opening; 2. Cover plate; 21. Plate body; 211. Protrusion; 212. Plate body receiving groove; 213. Terminal mounting hole; 22. Terminal; 3. Cell; 31. Cell body; 32. Tab; 321. First tab; 322. Bending part; 323. Second tab; 4. Adapter piece; 5. Insulator; 51. Protrusion; 52. Insulator receiving groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] A battery cell is the smallest charging and discharging unit. A battery cell consists of a positive electrode, a negative electrode, and a separator between them, formed by winding or stacking. The positive electrode includes a positive current collector and a positive active material. The positive current collector can be made of metals such as aluminum foil, nickel foil, or stainless steel, or a composite foil formed by combining metals and insulating materials. The positive active material includes the main positive active material, conductive agent, and binder. The main positive active material includes one or more of lithium-containing positive active materials such as lithium iron phosphate, ternary materials containing nickel, cobalt, and manganese, and lithium manganese iron phosphate. The negative electrode includes a negative current collector and a negative active material. The negative current collector can be made of metals such as copper foil, aluminum foil, or stainless steel, or a composite foil formed by combining metals and insulating materials. The negative active material includes the main negative active material, conductive agent, and binder. The main negative active material includes one or more of the main negative active materials such as artificial graphite, natural graphite, silicon carbide, silicon oxide, and lithium titanate. The tab serves as the current output terminal of the battery cell, and it can be integrated with or separately connected to the positive or negative electrode. The post is the current output terminal of the battery. The adapter plate and the tab, or the adapter plate and the post, can be electrically connected by welding, which includes ultrasonic welding, resistance welding, and laser welding.

[0028] When welding the tabs to the adapter plates in a battery, the tabs are usually welded to the lower surface of the adapter plate. This results in a larger required height space between the adapter plate and the battery cell, leading to low battery space utilization and affecting battery energy density. Figure 8 As shown, since the tabs are usually led out from one end of the cell body and are formed by pressing together a large number of tab pieces, in order to further improve the space utilization in the height direction of the battery, the tab pieces that have not been fully pressed can be placed under the adapter piece, and the tabs can be bent so that the bent tabs cover the upper surface of the adapter piece, and the upper surface of the adapter piece can be welded to the tabs.

[0029] At this point, part of the tab is accommodated between the cover plate and the adapter plate. Because the upper surface of the adapter plate is welded to the tab, weld marks are formed. These weld marks typically cannot completely cover the tab, causing it to gradually spread out from the weld edge. During the assembly of the cover plate and the housing, the cover plate is subjected to pressure, which in turn compresses the tab between the cover plate and the adapter plate. If the space between the adapter plate and the cover plate is small, the tab is prone to tearing, affecting its current-carrying capacity and failing to meet its current requirements. When the battery is fast-charged at high rates, the torn tab has limited current-carrying capacity, generates significant heat, and results in excessive internal resistance, posing safety risks such as thermal runaway and affecting the overall charge / discharge rate. Therefore, it is necessary to avoid tearing of the tab during assembly to prevent affecting its current-carrying capacity.

[0030] The battery provided by the embodiments of this utility model, by reasonably limiting the accommodating space between the cover plate and the adapter plate, ensures that even if the welded edges gradually spread after welding, the tabs will not be torn due to the pressure of the cover plate, thereby maintaining the integrity of the tabs, effectively improving the overcurrent capacity of the tabs, reducing the internal resistance of the battery, reducing the risk of thermal runaway, and improving the charging and discharging efficiency of the battery.

[0031] The following is combined with Figures 1 to 8 The following describes embodiments of the present invention.

[0032] According to an embodiment of the present invention, a battery is provided, comprising:

[0033] The housing 1 includes a first wall, on which a pole post is disposed;

[0034] The battery cell 3 is disposed inside the housing 1. The battery cell 3 includes a battery cell body 31 and a tab 32. The tab 32 extends from at least one end of the battery cell body 31 along a first direction and is electrically connected to the battery cell body 31.

[0035] The pole post 22 is adapted to be electrically connected to the tab 32;

[0036] Adapter 4 is electrically connected between pole 22 and tab 32;

[0037] The tab 32 includes a first tab portion 321 connected to the battery cell body 31 and a second tab portion 323 away from the battery cell body 31. The first tab portion 321 and the second tab portion 323 are respectively located on both sides of the adapter plate 4 along the first direction, and the first tab portion 321 and the second tab portion 323 are connected via a bending portion 322.

[0038] The second electrode ear 323 is welded to the adapter piece 4 and a solder mark is formed;

[0039] Along the first direction, the shortest distance between the surface of the adapter piece 4 facing the plate body 21 and the surface of the plate body 21 facing the adapter piece 4 is a, and the thickness of the tab 32 is m, satisfying: 0.5mm≤am≤9mm.

[0040] The housing 1 includes a first wall. In one implementation, the first wall can be one of the walls of the main body of the housing 1. In another implementation, at least one end of the housing 1 has an opening 12, and the plate body 21 is installed in the opening 12. In this case, the first wall specifically refers to the plate body 21 installed in the opening 12.

[0041] The plate body 21 is provided with pole mounting holes 213, and the pole 22 is installed in the pole mounting holes 213. At this time, the combined structure formed by the plate body 21 and the pole 22 is collectively referred to as the cover plate 2.

[0042] Combination Figure 1 , Figure 2 As shown, the battery in this embodiment includes a casing 1, a cover plate 2, and a battery cell 3. The casing 1 has an opening 12 at at least one end, and the cover plate 2 covers the opening 12 of the casing 1. The battery cell 3 is disposed inside the casing 1. The cover plate 2 includes a plate body 21 and a terminal post 22 disposed on the plate body 21. The plate body 21 and the terminal post 22 are insulated from each other. The terminal post 22 is used to connect the battery cell 3 to an external circuit to ensure stable current transmission. In the specific connection process, the tab 32 extends from at least one end of the battery cell body 31 along a first direction and connects the terminal post 22 and the tab 32 through an adapter piece 4.

[0043] Combination Figure 4 As shown, the tab 32 in this embodiment includes a first tab portion 321 connected to the battery cell body 31 and a second tab portion 323 away from the battery cell body 31. The first tab portion 321 and the second tab portion 323 are respectively located on both sides of the adapter plate 4 along the first direction, and the first tab portion 321 and the second tab portion 323 are connected via a bending portion 322. By welding the upper surface of the adapter plate 4 to the first tab portion 321, a stable connection between the tab 32 and the adapter plate 4 is achieved.

[0044] To better distinguish the boundary between the first electrode ear 321, the bent portion 322, and the second electrode ear 323, in conjunction with Figure 5 As shown, extension lines are drawn along the second direction on the upper and lower surfaces of the adapter plate 4, respectively. The area between the extension lines on the upper and lower surfaces of the adapter plate 4 is the bending portion 322; the area above the extension line on the upper surface of the adapter plate 4 is the second tab portion 323; and the area below the extension line on the lower surface of the adapter plate 4 is the first tab portion 321.

[0045] Since the first electrode ear 321 and the second electrode ear 323 are located on both sides of the adapter plate 4 along the first direction, and are further combined Figure 6 As shown, the tab 32 located between the adapter plate 4 and the cell body 31 is loosely raised below the adapter plate 4. Although the tab 32 located between the cover plate 2 and the adapter plate 4 will produce solder marks after welding, the area of ​​the solder marks cannot completely cover the second tab 323, causing the second tab 323 to gradually spread out from the welding edge. Therefore, the adapter plate 4 needs to reserve appropriate space for the arrangement of the tab 32 on both sides along the first direction.

[0046] This embodiment limits the lower limit of am to prevent am from being too small, thereby ensuring that the tab 32 has sufficient space between the adapter plate 4 and the cover plate 2. This prevents the tab 32 from being squeezed during assembly due to insufficient space, avoiding tearing caused by compression, and thus ensuring the current carrying capacity of the tab 32 to meet its requirements. Simultaneously, by limiting the lower limit of am, this embodiment ensures the current carrying capacity of the tab 32, preventing excessive heat generation from the tab during high-rate fast charging, avoiding excessive internal resistance of the battery, and reducing safety risks such as battery thermal runaway, thus ensuring the overall charge and discharge rate of the battery. Furthermore, by limiting the upper limit of am, it prevents am from being too large, ensuring that there is no excessive compression between the tab 32 and the cover plate 2 while maintaining contact. This allows the heat generated by the tab 32 to be conducted to the outside of the battery through the cover plate 2, which is beneficial for battery heat dissipation and ensures efficient space utilization in the height direction, thereby guaranteeing energy density.

[0047] By reasonably limiting the am range, both the tab 32 is prevented from being squeezed due to insufficient space and its effective contact with the cover plate 2 is ensured, thereby optimizing the heat dissipation path, improving the overall battery performance and safety, and extending its service life. At the same time, reasonably limiting the am range also prevents the tab 32 from tearing due to excessive compression, ensuring that the tab 32 maintains its structural integrity during welding, reducing damage caused by mechanical stress, further improving the battery's reliability and stability, and guaranteeing the overcurrent capacity of the tab 32.

[0048] For example, in this embodiment, the value of am can be 0.5mm or 1mm or 2mm or 2.5mm or 3mm or 4mm or 4.2mm or 5mm or 6mm or 7mm or 8mm or 9mm, or it can be a range formed by any two of the above values.

[0049] In some embodiments, the following condition is satisfied: 1mm ≤ a ≤ 10mm.

[0050] When 'a' is too small, the space between the adapter piece 4 and the cover plate 2 is insufficient, which may cause the cover plate 2 to squeeze the tab 32 during assembly, potentially leading to tearing of the tab 32 and affecting the battery's overcurrent capacity and safety. Conversely, when 'a' is too large, the space between the adapter piece 4 and the cover plate 2 is too large, which may result in poor contact between the tab 32 and the cover plate 2, hindering battery heat dissipation and resulting in low space utilization.

[0051] For example, in this embodiment, the value of 'a' can be 1mm or 2mm or 2.5mm or 3mm or 4mm or 4.2mm or 5mm or 6mm or 7mm or 8mm or 9mm or 10mm, or it can be any range formed by any two of the above values.

[0052] In some embodiments, the following condition is satisfied: 0.1mm ≤ m ≤ 4mm.

[0053] When m is too small, the thickness of tab 32 is too thin, resulting in poor current carrying capacity. This is not conducive to high-rate fast charging of the battery and can easily cause tab 32 to overheat due to excessive current, increasing the risk of battery thermal runaway. When m is too large, the thickness of tab 32 is too thick, causing the thickness of the second tab 323 to increase further after gradually spreading from the welding edge. This can easily lead to insufficient space causing the tab 32 to be squeezed during the assembly of the cover plate 2. The tab 32 is easily squeezed and torn, affecting the internal space layout of the battery, reducing energy density, and may also increase welding difficulty and affect production efficiency.

[0054] For example, in this embodiment, the value of m can be 0.1mm or 0.2mm or 0.5mm or 1mm or 2mm or 2.5mm or 3mm or 4mm, or it can be any range formed by any two of the above values.

[0055] In some embodiments, combined with Figures 4-7 As shown, the battery also includes:

[0056] The insulating element 5 is disposed between the plate body 21 and the second electrode ear 323 along the first direction.

[0057] By providing an insulating member 5 between the plate body 21 and the second electrode tab 323, the insulation effect between the plate body 21 and the electrode tab 32 can be guaranteed, preventing the plate body 21 from colliding with the electrode tab 32 which carries the opposite polarity and causing a short circuit, thereby improving the safety performance of the battery and ensuring the stability of current transmission.

[0058] In some embodiments, the thermal conductivity of the insulating element 5 is k, which satisfies: 0.03W / (m·K)≤k≤0.8W / (m·K).

[0059] If the thermal conductivity k of the insulating component 5 is too small, its poor thermal conductivity hinders battery heat dissipation, potentially leading to increased battery temperature and impacting performance and safety. Conversely, if the thermal conductivity k of the insulating component 5 is too large, it conducts heat too quickly, easily causing localized overheating within the battery. This results in uneven internal temperature distribution, increasing the risk of thermal runaway and affecting overall battery performance and lifespan. Therefore, by appropriately setting the thermal conductivity k of the insulating component 5, efficient heat dissipation can be achieved while preventing localized overheating.

[0060] For example, in this embodiment, the value of k can be 0.03W / (m·K), 0.03W / (m·K), 0.05W / (m·K), 0.08W / (m·K), 0.1W / (m·K), 0.3W / (m·K), 0.5W / (m·K), 0.7W / (m·K), or 0.8W / (m·K), or it can be any range formed by any two of the above values.

[0061] In some embodiments, the thickness of the insulating member 5 along the first direction is b, which satisfies: 0.06mm≤b≤2mm.

[0062] If the thickness b of the insulating component 5 is too small, its insulation performance will be poor, and the connection between the tab 32 and the cover plate 2 will easily break down, leading to insulation failure and a short circuit in the battery. Conversely, if the thickness b of the insulating component 5 is too large, it will occupy too much internal battery space, resulting in low space utilization, affecting the overall compactness of the battery structure and its energy density. Furthermore, the thickness of the insulating component 5 will occupy more space between the adapter 4 and the cover plate 2, reducing the space available to accommodate the second tab 323, making the tab 32 more susceptible to compression and tearing. Additionally, an excessively thick insulating component 5 will hinder battery heat dissipation, causing the battery temperature to rise and affecting performance and safety.

[0063] For example, in this embodiment, the value of b can be 0.06mm or 0.08mm or 0.1mm or 0.3mm or 0.8mm or 1mm or 1.2mm or 1.5mm or 2mm, or it can be any range formed by any two of the above values.

[0064] In some embodiments, combined with Figure 7 As shown, the insulating member 5 protrudes towards the side of the plate body 21 to form a protrusion 51, and the area of ​​the insulating member 5 located on the side of the protrusion 51 facing the second pole ear 323 forms an insulating member receiving groove 52.

[0065] The projection of the insulating element receiving groove 52 along the first direction at least partially overlaps with the second pole ear 323.

[0066] By making the projection of the insulating part receiving groove 52 along the first direction at least partially overlap with the second electrode ear 323, the receiving space of the second electrode ear 323 can be increased, thereby effectively preventing the electrode ear 32 from being squeezed due to insufficient space and reducing the risk of tearing. At the same time, the protrusion 51 can act as a reinforcing rib, improving the overall structural stability of the insulating part 5.

[0067] In some embodiments, the height of the insulating element receiving groove 52 along the first direction is d, which satisfies: 0.1mm≤d≤1.5mm.

[0068] When the height d of the insulating material receiving groove 52 is too small, the space provided for the second electrode tab 323 is insufficient, which may result in the second electrode tab 323 not being fully accommodated, and may cause the electrode tab 32 to be squeezed and torn. When the height d of the insulating material receiving groove 52 is too large, it will occupy too much internal space of the battery, which will further reduce the space utilization of the battery, affect the energy density and overall structural compactness of the battery, and is not conducive to the heat dissipation of the battery.

[0069] For example, in this embodiment, the value of d can be 0.1mm or 0.3mm or 0.8mm or 1mm or 1.2mm or 1.3mm or 1.5mm, or it can be a range formed by any two of the above values.

[0070] In some embodiments, the housing 1 includes a first housing wall 11, and the adapter piece 4 and the first housing wall 11 are respectively located on both sides of the bend 322 along the second direction;

[0071] Along the second direction, the width of the insulating component receiving groove 52 is c, which satisfies: 3mm≤c≤25mm.

[0072] In this embodiment, the first direction can be the length direction of the battery, and the second direction can be the thickness direction of the battery.

[0073] When the width c of the insulating material receiving groove 52 along the second direction is too small, the space provided for the second electrode tab 323 is insufficient, and it cannot fully cover the second electrode tab 323, which may cause the electrode tab 32 to be squeezed and torn. When the width c of the insulating material receiving groove 52 along the second direction is too large, it will occupy too much internal space of the battery, reduce the space utilization of the battery, affect the energy density and structural compactness, and at the same time, it is not conducive to heat dissipation and increases the risk of battery temperature rise.

[0074] For example, in this embodiment, the value of c can be 3mm or 4mm or 4.2mm or 5mm or 6mm or 7mm or 8mm or 9mm or 10mm or 12mm or 15mm or 20mm or 22mm or 25mm, or it can be any range formed by any two of the above values.

[0075] In some embodiments, combined with Figure 7 As shown, a protrusion 211 is formed on the side of the plate body 21 facing away from the insulating member 5. A plate body receiving groove 212 is formed in the area of ​​the plate body 21 on the side of the protrusion 211 facing the insulating member 5. The plate body receiving groove 212 is adapted to receive the protrusion 51.

[0076] The plate body receiving groove 212 is suitable for accommodating the protrusion 51, which can reduce the height of the plate body 21 in other positions, so that only a part of the plate body 21 protrudes without increasing the height of the entire battery, thereby improving space utilization.

[0077] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A battery, characterized in that, include: The housing (1) includes a first wall on which a pole post is disposed; A battery cell (3) is disposed in the housing (1). The battery cell (3) includes a battery cell body (31) and a tab (32). The tab (32) extends from at least one end of the battery cell body (31) along a first direction and is electrically connected to the battery cell body (31). The pole post (22) is adapted to be electrically connected to the tab (32); The adapter (4) is electrically connected between the pole (22) and the tab (32). The tab (32) includes a first tab portion (321) connected to the battery cell body (31) and a second tab portion (323) away from the battery cell body (31). The first tab portion (321) and the second tab portion (323) are respectively located on both sides of the adapter (4) along the first direction, and the first tab portion (321) and the second tab portion (323) are connected via a bend portion (322). The second electrode ear (323) is welded to the adapter piece (4) to form a solder mark; Along the first direction, the shortest distance between the surface of the adapter piece (4) facing the first wall and the surface of the first wall facing the adapter piece (4) is a, and the thickness of the tab (32) is m, satisfying: 0.5mm≤am≤9mm.

2. The battery according to claim 1, characterized in that, The battery also includes: An insulating element (5) is disposed between the first wall and the second electrode ear (323) along the first direction.

3. The battery according to claim 2, characterized in that, The thermal conductivity of the insulating component (5) is k, which satisfies: 0.03W / (m·K)≤k≤0.8W / (m·K).

4. The battery according to claim 2, characterized in that, Along the first direction, the thickness of the insulating element (5) is b, which satisfies: 0.06mm≤b≤2mm.

5. The battery according to claim 2, characterized in that, The insulating member (5) has a protrusion (51) protruding towards the first wall, and the insulating member (5) has an insulating member receiving groove (52) in the area of ​​the protrusion (51) facing the second electrode (323). The projection of the insulating receiving groove (52) along the first direction at least partially overlaps with the second electrode lug (323).

6. The battery according to claim 5, characterized in that, Along the first direction, the height of the insulating element receiving groove (52) is d, which satisfies: 0.1mm≤d≤1.5mm.

7. The battery according to claim 5, characterized in that, The housing (1) includes a first housing wall (11), and the adapter piece (4) and the first housing wall (11) are respectively located on both sides of the bent portion (322) along the second direction; Along the second direction, the width of the insulating element receiving groove (52) is c, which satisfies: 3mm≤c≤25mm.

8. The battery according to claim 5, characterized in that, The first wall protrudes to the side opposite to the insulating member (5) to form a protrusion (211), and the area of ​​the first wall on the side of the protrusion (211) facing the insulating member (5) forms a plate body receiving groove (212), which is adapted to receive the protrusion (51).

9. The battery according to claim 1, characterized in that, It satisfies: 1mm≤a≤10mm.

10. The battery according to claim 1, characterized in that, It must satisfy the condition: 0.1mm≤m≤4mm.

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