Battery and battery arrangement

Abstract

A battery having a first direction, a second direction and a third direction arranged perpendicular to each other, characterized in that it comprises: a cover plate body, wherein at least two first through-holes are arranged on the cover plate body, and an arrangement direction of two adjacent first through-holes is the first direction; a metal block, wherein the metal block is provided on one side of the cover plate body in the second direction, the second direction being the direction perpendicular to a plane in which the cover plate body is located, and the metal block has second through holes, the number of the first through holes being equal to the number of the second through holes, and the first through holes are connected to the second through holes in a one-to-one correspondence; Connection terminals, wherein the number of connection terminals is equal to the number of the first through-holes, the connection terminals correspond to the first through-holes in a one-to-one correspondence, the connection terminals penetrate into the first through-holes and the second through-holes along the second direction, and the connection terminals are firmly connected to the metal block; where the sum of the projection areas of the first through-holes projected along the second direction onto the metal block is “a” mm 2 and a first distance is provided between two adjacent terminals in at least two terminals in the first direction, and a sum of each first distance is “b” mm, and a dimension of the metal block along the third direction is “c” mm, where 0.015≤a / (b*c)≤2.5.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the technical field of accumulators or batteries and in particular to a battery and a battery arrangement. BACKGROUND

[0002] The battery cover plate is used to connect to the battery casing or battery housing, insulating the internal structure of the battery from the outside. The battery cover plate is also used to electrically connect a cell inside the battery to transfer the cell's current to the outside.

[0003] To improve the cell's overcurrent performance, the current technology generally provides multiple terminal posts on the battery cover plate. Furthermore, the battery cover plate must be welded to a conductive bus bar to electrically connect it to the outside.

[0004] Because the conductive busbar has requirements for flatness during welding, the conductive busbar is generally welded between two adjacent terminals. The welding area between the conductive busbar and the battery cover plate is related to the cell's overcurrent performance, and the terminal dimensions are also related to the cell's overcurrent performance. Therefore, to ensure the balance of the cell's overcurrent, the battery cover plate must be designed reasonably. SUMMARY OF THE UTILITY MODEL

[0005] The main purpose of the utility model is to provide a battery to ensure the overcurrent performance of the cell.

[0006] A further object of the utility model is to provide a battery assembly including the above battery.

[0007] In order to solve the above technical problems, the present utility model provides the following technical schemes: A battery having a first direction, a second direction and a third direction arranged perpendicular to each other, comprising: a cover plate body, wherein at least two first through-holes are arranged on the cover plate body, and an arrangement direction of two adjacent first through-holes is the first direction; a metal block, wherein the metal block is provided on one side of the cover plate body in the second direction, the second direction being the direction perpendicular to a plane in which the cover plate body is located, and the metal block has second through holes, the number of the first through holes being equal to the number of the second through holes, and the first through holes are connected to the second through holes in a one-to-one correspondence; Connection terminals, wherein the number of connection terminals is equal to the number of the first through-holes, the connection terminals correspond to the first through-holes in a one-to-one correspondence, the connection terminals penetrate into the first through-holes and the second through-holes along the second direction, and the connection terminals are firmly connected to the metal block; where the sum of the projection areas of the first through-holes projected along the second direction onto the metal block is “a” mm 2 and a first distance is provided between two adjacent terminals in at least two terminals in the first direction, and a sum of each first distance is “b” mm, and a dimension of the metal block along the third direction is “c” mm, where 0.015≤a / (b*c)≤2.5.

[0008] The present utility model further provides a battery assembly including a conductive bus bar and the above battery, wherein at least two batteries are provided and two adjacent batteries are electrically connected by the conductive bus bar, and the conductive bus bar is welded to the metal block and located between two adjacent terminals.

[0009] The battery of the present utility model has the following advantageous effects compared to the prior art: In the present utility model, when at least two terminals are provided on the cover plate body, taking into account the requirement for the flatness of the welding surface of the metal block when welding the conductive busbar, the conductive busbar is generally welded on the metal block and between two adjacent terminals. Since the terminal passes through the first through-holes and the second through-holes, the sum of the areas of the first through-holes on the cover plate body has a certain influence on the welding surface on the metal block. That is, it has an influence on the overcurrent performance between the metal block and the conductive busbar. In addition, the sum of the areas of the first through-holes also has a certain influence on the dimension of the terminals. That is, it has an influence on the overcurrent performance of the cell.Therefore, in the present utility model, 0.015≤a / (b*c)≤2.5 is set to balance the overcurrent performance of the cell and the overcurrent performance between the metal block and the conductive busbar, so that the overcurrent from inside and outside of the battery is more balanced. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view of the cover plate body and the metal block of the embodiment of the present utility model; Fig. 2 is a cross-sectional view of the cover plate body and the metal block of the embodiment of the present utility model; Fig. 3 is a schematic diagram of the overall structure of the battery according to the embodiment of the present utility model; Fig. 4 is an enlarged view of “A” in Fig. 3.

[0010] In the figures: 1. Cover plate body; 11. First through hole; 2. Metal block; 21. Second through hole; 211. First partial hole section; 212. Second partial hole section; 3. Terminal; 31. Riveted section; 32. Restrictor section; 4. Casing; 5. Cell; 51. Cell body; 52. Terminal terminal or tab; 6. Explosion-proof valve; 7. Electrolyte injection port; 8. First insulation sealing member; 9. Second insulation sealing member. DETAILED DESCRIPTION OF EMBODIMENTS

[0011] Embodiments of the present utility model are described in more detail below in conjunction with the attached drawings and examples. The following examples serve to illustrate the present utility model and are not intended to limit the scope of protection of the present utility model.

[0012] It should be noted that in the description of the present utility model, the term "include" refers to the presence of the features, integers, steps, operations, parts / components, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts / components, components, and / or groups thereof. It should be noted that when it is said that a part / component is "connected" to another part / component, it / they may be directly connected to other parts / components, or intermediate parts / components may be present. The term "and / or" as used herein includes all or any unit and all combinations of one or more related recited elements.

[0013] As it is in the Fig.As can be seen from Figures 1 to 4, the present utility model relates to a battery having a first direction, a second direction, and a third direction arranged perpendicular to each other. The first direction is specifically the longitudinal direction of the battery cover plate, the second direction is specifically the vertical direction of the battery cover plate, and the third direction is specifically the width direction of the battery cover plate. The battery cover plate comprises a cover plate body 1, a metal block 2, and a terminal 3.

[0014] At least two first through-holes 11 are arranged on the cover plate body 1, and an arrangement direction of two adjacent first through-holes 11 is the first direction.

[0015] The metal block 2 is provided on one side of the cover plate body 1 in the second direction, and the second direction is the direction perpendicular to the plane in which the cover plate body 1 is located. The metal block 2 has second through-holes 21. The number of the first through-holes 11 is the same as the number of the second through-holes 21, and the first through-holes 11 are connected to the second through-holes 21 in a one-to-one correspondence. The opening of the first through-hole 11 is the same as the opening of the second through-hole 21.

[0016] The number of first terminals 3 is the same as the number of second through-holes 11, and the terminals 3 correspond to the first through-holes 11 in a one-to-one correspondence. The terminals 3 penetrate the first through-holes 11 and the second through-holes 21 along the second direction, and the terminals 3 are firmly connected to the metal block 2.

[0017] In the present embodiment, the sum of the projection areas of the first through holes 11 projected along the second direction onto the metal block 2 is “a” mm 2A first distance is provided between two adjacent terminals 3 in the at least two terminals 3 in the first direction, and the sum of each first distance is "b" mm, and the dimension of the metal block 2 along the third direction is "c" mm, where 0.015≤a / (b*c)≤2.5. The value of "a / (b*c)" can be 0.08, 0.2, 0.3, 0.8, 1.2, 1.5, 1.8, 2, 2.2, 2.3, or 2.4.

[0018] In the present utility model, when at least two terminals 3 are provided on the cover plate body 1, considering the requirement for the flatness of the welding surface of the metal block 2 when welding the conductive busbar, the conductive busbar is generally welded on the metal block 2 and between two adjacent terminals 3. Since the terminals 3 pass through the first through holes 11 and the second through holes 21, the sum of the areas of the first through holes 11 on the cover plate body 1 has a certain influence on the welding surface on the metal block 2. That is, it has an influence on the overcurrent performance between the metal block 2 and the conductive busbar. In addition, the sum of the areas of the first through holes 11 also has a certain influence on the dimension of the terminals 3.That is, it has an influence on the overcurrent performance of cell 5. Therefore, in the present utility model, 0.015≤a / (b*c)≤2.5 is set to balance the overcurrent performance of cell 5 and the overcurrent performance between the metal block 2 and the conductive busbar, so that the overcurrent from inside and outside of the battery is more balanced.

[0019] In some embodiments, 19mm 2 ≤a≤200 mm 2 . The value of "a" can be 22 mm, 26 mm, 34 mm, 39 mm, 45 mm, 60 mm, 90 mm, 140 mm, 160 mm, 180 mm or 190 mm.

[0020] In some embodiments, 10 mm ≤ b ≤ 50 mm. The value of "b" can be 12 mm, 14 mm, 18 mm, 24 mm, 30 mm, 38 mm, 46 mm, or 48 mm.

[0021] In some embodiments, 8 mm ≤ c ≤ 25 mm. The value of "c" can be 10 mm, 12 mm, 14 mm, 18 mm, 22 mm, 23 mm, or 24 mm.

[0022] In some embodiments, 200mm 2 ≤b*c≤1000mm 2The value of “b*c” can be 220 mm 2 , 260 mm 2 , 350 mm 2 , 390 mm 2 , 480 mm 2 , 560 mm 2 , 640 mm 2 , 780 mm 2 , 850 mm 2 , 900 mm 2 , 920 mm 2 , 960 mm 2 or 980 mm 2 be.

[0023] In the present embodiment, in the first direction, the minimum distance between the terminal 3 at the edge and the edge of the metal block 2 is "d" mm, where 1 mm≤d≤10 mm, 0.015≤a / (b*c)≤1.5. The value of "d" can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or 9 mm.

[0024] Specifically, the first direction is also the arrangement direction of the terminals 3. In the two terminals 3 in the first direction located at the outermost ends, the distance between one of the terminals 3 and the side of the metal block 2 adjacent to the terminal 3 in the first direction is "d." Similarly, the distance between the other of the terminals 3 and the side of the metal block 2 adjacent to the terminal 3 in the first direction is "d." Then, 1 mm≤d≤10 mm is maintained, so that the distance between the outermost terminal 3 and the side of the metal block 2 will not be too small, so as to prevent the deformation of the metal block 2 when riveting the terminals 3 and the metal block 2 and avoid affecting the subsequent welding.In addition, the distance between the outermost terminal 3 and the side of the metal block 2 will not be too large, so that the distance between the two adjacent terminals 3 will not be too small, so that the welding area of ​​the conductive busbar will not be affected.

[0025] In the present embodiment, the minimum distance between the two adjacent terminals in the first direction is 3 mm "b1", 3 mm≤b1≤15 mm. The value of "b1" can be 4 mm, 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, or 14 mm.

[0026] The metal block 2 is riveted to the cover plate body 1 by the terminals 3. Therefore, if the two adjacent terminals 3 are too close to each other, the area between the two adjacent terminals 3 will be severely compressed, resulting in deformation of the area and impairing the sealing effect. This will also affect the subsequent welding stability with the conductive busbar. In order to ensure the sealing between the terminals 3 and the metal block 2, after the terminals 3 are riveted through the metal block 2, the terminals 3 and the metal block 2 must be further welded to ensure sealing. If the two adjacent terminals 3 are too close to each other, the welding heat will be too concentrated during the welding process, which will impair the insulation and sealing performance.If the two adjacent terminals 3 are too far apart, the dimension of the metal block 2 in the first direction becomes too large or the area where the terminal 3 can be provided is reduced, thereby affecting the overcurrent capacity of the battery. Therefore, 3mm≤b1≤15mm is maintained to ensure the sealing performance and overcurrent performance of the battery.

[0027] In the present embodiment, the second through-hole 21 includes a first partial hole portion 211 and a second partial hole portion 212, which are provided sequentially and connected to each other along the second direction. The first partial hole portion 211 is located on the side of the metal block 2 facing away from the cover plate body 1, and the second partial hole portion 212 is located on the side of the metal block 2 facing the cover plate body 1. The opening of the first partial hole portion 211 is larger than the opening of the second partial hole portion 212, and the opening of the second partial hole portion 212 is equal to the opening of the first through-hole 11.One end of the terminals 3 in the second direction has a riveted portion 31, and the terminal 3 passes through the first partial hole portion 211, the second partial hole portion 212, and the first through-hole 11, and the riveted portion 31 of the terminals 3 is riveted in the first partial hole portion 211. The outer periphery of the riveted portion 31 is welded and fixed to the metal block 2. In at least two of the first partial hole portions 211 in the first direction, a second distance is provided between two adjacent first partial hole portions 211, and the sum of each second distance is "f" mm, where "f" is equal to "b". Therefore, since the riveted portion 31 of the terminal 3 is riveted in the first partial hole portion 211, the dimension of the first partial hole portion 211 directly affects the welding area on the metal block 2 for welding the conductive busbar.Therefore, the first distance is the second distance.

[0028] Specifically, the second through-hole 21 includes a first partial hole portion 211 and a second partial hole portion 212, which are provided sequentially and connected to each other along the second direction. That is, the second through-hole 21 corresponds to a counterbore. In this arrangement, when the terminal 3 is riveted to the metal block 2 to fix the metal block 2 to the cover plate body 1, the riveted portion 31 formed on the terminal 3 after riveting can be arranged in the first partial hole portion 211, so that the terminal 3 does not protrude outside the metal block 2, so as not to easily interfere with the subsequent welding of the conductive busbar.

[0029] In the present embodiment, the other end of the terminal 3 in the second direction has a restricting portion 32, and the restricting portion 32 is fixed to a side of the cover plate body 1 facing away from the metal block 2.

[0030] Specifically, the dimension of the restricting portion 32 is larger than the opening of the first through-hole 11 of the cover plate body 1. In this arrangement, the restricting portion 32 can be attached to the side of the cover plate body 1 facing away from the metal block 2, so that the metal block 2 can be stably fixed to the cover plate body 1 by the terminal 3. Furthermore, providing the restricting portion 32 can also increase the welding area of ​​the terminal 3 to facilitate welding of the terminal 3 and the tab 52.

[0031] The limiting portions 32 of all the terminals 3 on the cover plate body 1 may be formed integrally, and the limiting portions 32 of all the terminals 3 on the cover plate body 1 may also be provided independently of each other.

[0032] In the present embodiment, a first insulation sealing member 8 is provided between the first through-hole 11 and the connection terminal 3, and a second insulation sealing member 9 is provided between the metal block 2 and the cover plate body 1.

[0033] By providing the first insulating sealing member 8 and the second insulating sealing member 9, the terminal 3 and the metal block 2 are both insulated and sealed with the cover plate body 1 to prevent short circuit and improve the sealing of the battery.

[0034] In some embodiments, the battery further includes a housing 4 and an explosion-proof valve 6. The housing 4 has an opening, the cover plate body 1 is covered at the opening of the housing 4, and the explosion-proof valve 6 is provided on the cover plate body 1, where 0.015≤a / (b*c)≤2.3.

[0035] When the explosion-proof valve 6 and the terminal block 3 are located on the same side of the cover plate body 1, the explosion-proof valve 6 occupies the position on the cover plate body 1, so the area for providing the terminal block 3 is also reduced. In this case, the dimension of the first through-hole 11 must be reduced, otherwise it will affect the structural strength of the cover plate body 1. Therefore, the upper limit of the sum "a" of the projected areas of the first through-holes 11 projected along the second direction onto the metal block 2 is reduced. In addition, to ensure that the explosion-proof valve 6 has a position to be installed, "b" cannot be too large. In addition, considering the need for heat dissipation, "b" cannot be too small, so it is necessary to maintain 0.015≤a / (b*c)≤2.3.

[0036] Preferably, the battery further comprises a cell 5 provided in the housing 4. The cell 5 has a cell body 51 and a tab 52 connected to the cell body 51. The tab 52 is welded to the terminal 3. The projection area of ​​the tab 52 projected along the second direction onto the cover plate body 1 does not overlap with the projection area of ​​the explosion-proof valve 6 projected along the second direction onto the cover plate body 1.

[0037] By making the projection area of ​​the tab 52 projected along the second direction onto the cover plate body 1 not overlap with the projection area of ​​the explosion-proof valve 6 projected along the second direction onto the cover plate body 1, that is, the tab 52 is not located directly below the explosion-proof valve 6, and the tab 52 and the explosion-proof valve 6 are provided offset, the tab 52 can be prevented from causing the explosion-proof valve 6 to explode.

[0038] In some embodiments, the battery further includes a housing 4 and an electrolyte injection port 7. The housing 4 has an opening, the cover plate body 1 is covered at the opening of the housing 4, and the electrolyte injection port 7 is provided on the cover plate body 1, where 0.08≤a / (b*c)≤2.3.

[0039] Since both the terminal 3 and the electrolyte injection port 7 are provided on the cover plate body 1, the electrolyte injection port 7 occupies a position on the cover plate body 1. Thus, the dimensions of both the metal block 2 and the first through-hole 11 should not be too large. If the metal block 2 is too large, it will affect the use of the electrolyte injection device during the electrolyte injection process. If the first through-hole 11 is too large, it will affect the structural strength of the cover plate body 1, resulting in the cover plate body 1 being insufficiently strong and deformed during the electrolyte injection process. Therefore, it is necessary to maintain 0.08≤a / (b*c)≤2.3.

[0040] Preferably, the battery further comprises a cell 5 provided in the housing 4. The cell 5 has a cell body 51 and a tab 52 connected to the cell body 51. The tab 52 is welded to the terminal 3, and the projection area of ​​the tab 52 projected along the second direction onto the cover plate body 1 partially overlaps or does not overlap with the projection area of ​​the electrolyte injection port 7 projected along the second direction onto the cover plate body 1.

[0041] When the projection area of ​​the tab 52 projected along the second direction onto the cover plate body 1 partially overlaps with the projection area of ​​the electrolyte injection port 7 projected along the second direction onto the cover plate body 1, the electrolyte injected into the electrolyte injection port 7 by the user will not directly flush the cell 5; when the projection area of ​​the tab 52 projected along the second direction onto the cover plate body 1 does not overlap with the projection area of ​​the electrolyte injection port 7 projected along the second direction onto the cover plate body 1, the cell 5 is unlikely to interfere with the inflow of the electrolyte, and the electrolyte injection efficiency can be improved.

[0042] In some embodiments, the battery further includes a casing 4, an explosion-proof valve 6, and an electrolyte injection port 7. The casing 4 has an opening, the cover plate body 1 is covered at the opening of the casing 4, and the explosion-proof valve 6 and the electrolyte injection port 7 are provided on the cover plate body 1, where 0.08≤a / (b*c)≤2.1.

[0043] Since the terminal block 3, the explosion-proof valve 6, and the electrolyte injection port 7 are all provided on the cover plate body 1, the dimensions of both the metal block 2 and the first through hole 11 should not be too large. If the metal block 2 is too large, it will affect the use of the electrolyte injection device during the electrolyte injection process. If the first through hole 11 is too large, it will affect the structural strength of the cover plate body 1, resulting in the cover plate body 1 being deformed due to insufficient strength during the electrolyte injection process. Therefore, it is necessary to maintain 0.08≤a / (b*c)≤2.1.

[0044] Note that to further explain the value of "b," the present utility model uses examples to illustrate that four terminals 3 are provided, and three first distances are formed between the four terminals 3. The values ​​of each first distance in the first direction are "b1" mm, "b2" mm, and "b3" mm, respectively, where b=b1+b2+b3.

[0045] The present utility model also relates to a battery assembly comprising a conductive busbar and the battery, wherein at least two batteries are provided, and two adjacent batteries are electrically connected by the conductive busbar. The conductive busbar is welded to the metal block 2 and is located between the two adjacent terminals 3 to complete the electrical connection between the batteries.

[0046] The above is only a preferred embodiment of the present utility model. It should be noted that it is possible for those of ordinary skill in the art to make various improvements and substitutions without deviating from the technical principle of the present utility model, and these improvements and substitutions should also be considered within the scope of the present application.

Claims

[1] Battery having a first direction, a second direction and a third direction arranged perpendicular to each other, characterized by that it includes: a cover plate body, wherein at least two first through-holes are arranged on the cover plate body, and an arrangement direction of two adjacent first through-holes is the first direction; a metal block, wherein the metal block is provided on one side of the cover plate body in the second direction, the second direction being the direction perpendicular to a plane in which the cover plate body is located, and the metal block has second through holes, the number of the first through holes being equal to the number of the second through holes, and the first through holes are connected to the second through holes in a one-to-one correspondence; Connection terminals, wherein the number of connection terminals is equal to the number of the first through-holes, the connection terminals correspond to the first through-holes in a one-to-one correspondence, the connection terminals penetrate into the first through-holes and the second through-holes along the second direction, and the connection terminals are firmly connected to the metal block; where the sum of the projection areas of the first through-holes projected along the second direction onto the metal block is “a” mm 2 and a first distance is provided between two adjacent terminals in at least two terminals in the first direction, and a sum of each first distance is “b” mm, and a dimension of the metal block along the third direction is “c” mm, where 0.015≤a / (b*c)≤2.

5. [2] Battery according to claim 1, characterized by that 19mm 2 ≤a≤200mm 2 . [3] Battery according to claim 1 or 2, characterized by that 10 mm≤b≤50 mm. [4] Battery according to one of the preceding claims, characterized by that 8 mm≤c≤25 mm. [5] Battery according to one of the preceding claims, characterized by that 200mm 2 ≤b*c≤1000mm 2 . [6] Battery according to one of the preceding claims, characterized by that in the first direction the minimum distance between the terminal at the edge and the edge of the metal block is “d” mm, where 1 mm≤d≤10 mm, 0.015≤a / (b*c)≤1.

5. [7] Battery according to one of the preceding claims, characterized by that in the first direction the minimum distance between two adjacent terminals “b1” mm is 3mm≤b1≤15mm. [8] Battery according to one of the preceding claims, characterized bythat the second through-hole comprises a first partial hole portion and a second partial hole portion, which are provided one after the other and connected to each other along the second direction, wherein the first partial hole portion is arranged on a side of the metal block facing away from the cover plate body, the second partial hole portion is located on a side of the metal block facing the cover plate body, the opening of the first partial hole portion is larger than the opening of the second partial hole portion, the opening of the second partial hole portion is equal to the opening of the first through-hole, the connecting terminal has a riveted portion at one end in the second direction, the connecting terminal passes through the first partial hole portion, the second partial hole portion, and the first through-hole, and the riveted portion of the connecting terminal is riveted into the first partial hole portion,and a second distance is provided between two adjacent first partial hole sections in at least two first partial hole sections in the first direction, and the sum of each second distance is "f" mm, where "f" is equal to "b". [9] Battery according to claim 8, characterized by that the connection terminal has a limiting portion at the other end in the second direction and the limiting portion is attached to a side of the cover plate body facing away from the metal block. [10] Battery according to claim 9, characterized by that limiting sections of all connection terminals are formed integrally on the cover plate body. [11] Battery according to claim 9 or 10, characterized by that limiting sections of all terminals on the cover plate body are provided independently of each other. [12] Battery according to one of the preceding claims, characterized bythat a first insulation sealing member is provided between the first through-hole and the connection terminal, and a second insulation sealing member is provided between the metal block and the cover plate body. [13] Battery according to one of the preceding claims, characterized by that it further comprises a housing and an explosion-proof valve, wherein the housing has an opening, the cover plate body is covered at the opening of the housing, and the explosion-proof valve is provided on the cover plate body, wherein 0.015≤a / (b*c)≤2.

3. [14] Battery according to claim 13, characterized byin that it further comprises a cell provided in the housing, the cell comprising a cell body and a tab connected to the cell body, the tab being welded to the terminal, and the projection area of ​​the tab projected along the second direction onto the cover plate body not overlapping with the projection area of ​​the explosion-proof valve projected in the second direction onto the cover plate body. [15] Battery according to one of the preceding claims, characterized by that it further comprises a housing and an electrolyte injection port, wherein the housing has an opening, the cover plate body is covered at the opening of the housing, and the electrolyte injection port is provided on the cover plate body, wherein 0.08≤a / (b*c)≤2.

3. [16] Battery according to claim 15, characterized byin that it further comprises a cell provided in the housing, the cell comprising a cell body and a tab connected to the cell body, the tab being welded to the terminal, and the projection area of ​​the tab projected along the second direction onto the cover plate body partially or not overlapping with the projection area of ​​the electrolyte injection port projected in the second direction onto the cover plate body. [17] Battery according to one of the preceding claims, characterized by that it further comprises a housing, an explosion-proof valve and an electrolyte injection port, wherein the housing has an opening, the cover plate body is covered at the opening of the housing, and the explosion-proof valve and the electrolyte injection port are both provided on the cover plate body, wherein 0.08≤a / (b*c)≤2.

1. [18] Battery arrangement, characterized byin that it comprises a conductive busbar and a battery according to any one of claims 1 to 17, wherein at least two batteries are provided and two adjacent batteries are electrically connected by the conductive busbar, wherein the conductive busbar is welded to the metal block and is located between two adjacent terminals.

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