CN115663363A - Battery end cover assembly, energy storage device and electric equipment - Google Patents
Battery end cover assembly, energy storage device and electric equipment Download PDFInfo
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- CN115663363A CN115663363A CN202211412097.8A CN202211412097A CN115663363A CN 115663363 A CN115663363 A CN 115663363A CN 202211412097 A CN202211412097 A CN 202211412097A CN 115663363 A CN115663363 A CN 115663363A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 21
- 238000003466 welding Methods 0.000 claims description 74
- 239000012212 insulator Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 1
- 230000002950 deficient Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000000875 corresponding effect Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a battery end cover assembly, an energy storage device and electric equipment, wherein the battery end cover assembly comprises: end cover, insulating board and two switching pieces. Wherein, the insulating board includes: the insulating plate comprises an insulating plate main body, two first flanges and two second flanges, wherein the two first flanges are connected to two opposite sides of the insulating plate main body; the minimum distance from the edge of each adapter sheet to the inner edges of the two first flanges is respectively D1 and D1', D1 is more than or equal to 0.05 and less than or equal to 300mm, and D1' is more than or equal to 0.05 and less than or equal to 300mm; the minimum distance from the edge of each adapter plate to the inner edge of the adjacent second flange is D2, and D2 is more than or equal to 0.05 and less than or equal to 10mm. The battery end cover assembly can guarantee the corresponding arrangement of the adapter plate and the lug, reduces the defective proportion of the battery end cover assembly and improves the safety of a battery.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery end cover assembly, an energy storage device and electric equipment.
Background
In the structure of the battery, the adapter plate is arranged on an insulating plate of the battery and is used for electrically connecting a pole and a pole lug. When the adapter sheet needs to be arranged on different end covers, a large amount of time and resources are needed to verify the arrangement position range of the adapter sheet, so that resources are wasted, and the input cost of products is increased.
In addition, the connection position range of the adapter sheet is set according to experience, so that the adapter sheet is easy to set and shift, and the proportion of defective products in assembly in product production is improved. And when the position of the adapter sheet is deviated, short circuit may occur inside the battery, which affects the safety of the battery.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the battery end cover assembly, the adapter sheet of the battery end cover assembly can ensure the corresponding arrangement of the adapter sheet and the lug, meanwhile, the defective proportion of the battery end cover assembly is reduced, and the safety of a battery is improved.
The application further provides an energy storage device adopting the battery end cover assembly.
The application also provides an electric device using the energy storage device.
A battery end cap assembly according to an embodiment of the present invention includes: an end cap; the insulating plate is connected to one side of the end cover; the two adapter pieces are arranged on one side, far away from the end cover, of the insulating plate, and are arranged at intervals along the length direction of the end cover; wherein the insulating plate includes: the insulating plate comprises an insulating plate main body, two first flanges and two second flanges, wherein the two first flanges are connected to two opposite sides of the insulating plate main body, the two second flanges are connected to the other two opposite sides of the insulating plate main body, and the first flanges and the second flanges are protruded towards one side far away from the end cover relative to the insulating plate main body; the minimum distance from the edge of each adapter sheet to the inner edges of the two first flanges is respectively D1 and D1', D1 is more than or equal to 0.05 and less than or equal to 300mm, and D1' is more than or equal to 0.05 and less than or equal to 300mm; the minimum distance from the edge of each adapter plate to the inner edge of the second flange adjacent to the adapter plate is D2, and D2 is more than or equal to 0.05 and less than or equal to 10mm.
According to the battery end cover assembly provided by the embodiment of the invention, the arrangement position of the adapter sheet on the insulating plate has a larger adjustable range, so that the corresponding arrangement of the adapter sheet and the lug can be ensured, the condition of poor contact between the adapter sheet and the lug is reduced or avoided in the assembly of the battery end cover assembly, and the defective product proportion of the battery end cover assembly is reduced. Meanwhile, after the adapter plate is connected to the insulating plate, the setting position of the adapter plate is not easy to deviate, and an enough gap is formed between the two adapter plates, so that the short circuit risk between the lugs or between the adapter plates caused by the deviation of the adapter plate is reduced or avoided, and the safety of the battery is improved.
In some embodiments, the interposer includes a post welding area, a dimension of the post welding area along a width direction of the end cap is L1, and a dimension of the post welding area along a length direction of the end cap is L2; the minimum distances from the edge of the polar post welding area to the inner edges of the two first flanges are W1 and W1', W1 is more than or equal to 2 and L1 and less than or equal to 10 and L1, and W1' is more than or equal to 2 and L1 and less than or equal to 10 and L1 respectively; the minimum distance from the edge of the polar post welding area to the inner edge of the second flange adjacent to the polar post welding area is W2, and W2 is more than or equal to 2 and L2 and less than or equal to 10 and L2. From this, be convenient for adjust the setting position of switching piece on the insulation board, can guarantee simultaneously that switching piece and utmost point post have better connection effect, and switching piece non-deformable.
In some embodiments, the adaptor sheet includes two tab welding areas, a dimension of the tab welding areas along a width direction of the end cover is L3, and a dimension of the tab welding areas along a length direction of the end cover is L4; the minimum distance from the edge of the tab welding area to the inner edge of the first flange adjacent to the tab welding area is W3, and W3 is more than or equal to 0.3 and less than or equal to 2 and less than or equal to 3; the minimum distance from the edge of the tab welding area to the inner edge of the second flange adjacent to the edge of the tab welding area is W4, and L4 is not less than W4 and not more than 4 L4. Therefore, the connection of the pole lug on the adapter plate is facilitated, and the contact stability of the pole lug and the adapter plate is improved.
In some embodiments, the interposer has a thickness h1; the thickness of the first flange protruding out of the main body of the insulating plate is h2, and h2 is more than or equal to 1.3 × h1 and less than or equal to 8 × h1; the thickness of the second flange protruding out of the main body of the insulating plate is h3, and h3 is more than or equal to 2 and more than or equal to h1 and less than or equal to 10 and more than or equal to h1. Therefore, the stable connection of the lug on the adapter plate is ensured, and the improvement of the energy density of the battery under the limited battery volume is facilitated.
In some embodiments, the cell end cap assembly further comprises: the explosion-proof valve is arranged in the center of the cover plate; the minimum distances from the edges of the two adapter pieces to the edge of the explosion-proof valve are D3 and D4 respectively, D3 is more than or equal to 0.1 and less than or equal to 30mm, and D4 is more than or equal to 0.1 and less than or equal to 30mm. From this, two switching pieces are separated in explosion-proof valve's both sides, and two switching pieces all are greater than 0.1mm apart from explosion-proof valve's distance (D3 and D4), can avoid the switching piece to form to block explosion-proof valve, prevent simultaneously that two switching piece contacts from leading to the short circuit.
Furthermore, the insulation board is an integrated board, the two adapter pieces are symmetrically arranged on the insulation board relative to the explosion-proof valve, so that the processing of the insulation board can be facilitated, the operation of arranging the insulation board on the end cover can be simplified, and meanwhile, the weight balance of the battery end cover assembly on two sides of the explosion-proof valve is facilitated.
In some embodiments, the insulating plate comprises: the cover plate comprises a positive insulating plate and a negative insulating plate, wherein the positive insulating plate and the negative insulating plate are arranged at intervals along the length direction of the cover plate, and the two adapter pieces are respectively connected to the positive insulating plate and the negative insulating plate. From this, two switching pieces are encircleed by anodal insulation board and negative pole insulation board respectively, and the explosion-proof valve can be located between anodal insulation board and the negative pole insulation board to can avoid the switching piece to block explosion-proof valve formation, prevent simultaneously that two switching piece contacts to lead to the short circuit.
Furthermore, the anode insulating plate and the cathode insulating plate are symmetrically arranged relative to the explosion-proof valve, and the two adapter pieces are symmetrically arranged relative to the explosion-proof valve. From this, through the shape and the weight unanimity that set up anodal insulating board and negative pole insulating board, and the shape and the weight unanimity of two switching pieces, can make battery end cover subassembly comparatively average in explosion-proof valve's relative both sides weight, can improve the stability of battery end cover subassembly setting on the battery.
In some embodiments, when the adaptor plate is provided with two tab welding areas, the size of the tab welding areas along the length direction of the end cover is L4; the minimum distances from the edges of the two lug welding areas to the edge of the explosion-proof valve are W5 and W6 respectively, W5 is not less than L4 and not more than 5X L4, and W6 is not less than L4 and not more than 5X L4.
In some embodiments, the insulating plate is provided with a limiting portion corresponding to the adapter sheet. Therefore, the welding and fixing effect of the pole lug and the adapter sheet can be improved while the function of the explosion-proof valve is not influenced.
An energy storage device according to an embodiment of the present invention includes: a battery end cap assembly according to any preceding claim.
According to the energy storage device provided by the embodiment of the invention, by adopting the battery end cover assembly provided by the embodiment, the corresponding arrangement of the adapter sheet and the lug can be ensured, the condition of poor contact between the adapter sheet and the lug is reduced or avoided in the assembly of the battery end cover assembly, and the defective proportion of the battery end cover assembly is reduced. Meanwhile, the short circuit risk in the energy storage device can be reduced or avoided, and the safety of the energy storage device is improved.
According to the embodiment of the invention, the electric equipment comprises the energy storage device.
According to the electric equipment provided by the embodiment of the invention, by adopting the energy storage device provided by the embodiment of the invention, the short circuit risk in the electric equipment can be reduced or avoided, and the safety of the electric equipment is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a front view of a battery end cap assembly according to a first embodiment of the present invention;
FIG. 2 is a schematic illustration of the location of the terminal post weld area of the cell end cap assembly of the embodiment of FIG. 1;
FIG. 3 is a schematic illustration of the location of the tab welding region of the cell end cap assembly of the embodiment of FIG. 1;
FIG. 4 is a side view of the cell end cap assembly of the embodiment of FIG. 1;
FIG. 5 is a front view of a battery end cap assembly according to a second embodiment of the present invention;
FIG. 6 is a side view of the cell end cap assembly of the embodiment of FIG. 5;
fig. 7 is a front view of a cell end cap assembly according to a third embodiment of the present invention.
Reference numerals:
a battery end cap assembly 100,
An end cover 10,
An adapter plate 12, a pole welding area 121, a pole lug welding area 122,
An explosion-proof valve 13 and a protective cover 14.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "inner", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A battery end cap assembly 100, an energy storage device, and a consumer according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, a battery end cap assembly 100 according to an embodiment of the present invention includes: end cap 10, insulating board 11 and two adaptor pieces 12. Insulating board 11 is connected in end cover 10 one side, and two adaptor pieces 12 set up the one side of keeping away from end cover 10 at insulating board 11, and two adaptor pieces 12 set up along the length direction interval of end cover 10.
Wherein, insulating board 11 includes: the insulating plate comprises an insulating plate body 111, two first flanges 112 and two second flanges 113, wherein the two first flanges 112 are connected to two opposite sides of the insulating plate body 111, the two second flanges 113 are connected to the other two opposite sides of the insulating plate body 111, and the first flanges 112 and the second flanges 113 are protruded towards one side far away from the end cover 10 relative to the insulating plate body 111.
It will be appreciated that the insulator plate 11 serves to space the tabs inside the cell from the cover plate and prevent the tabs from making electrical contact with the end cap 10, which could result in a short circuit inside the cell, and therefore the projection of the tabs inside the cell onto the end cap 10 is located within the insulator plate 11.
Under the structure, the two adapter plates 12 are arranged in the area surrounded by the first flange 112 and the second flange 113, namely, the projections of the two adapter plates 12 on the end cover 10 are both positioned in the insulating plate 11, so that the adapter plates 12 can correspond to the pole lugs, and the adapter plates 12 and the pole lugs are not easy to contact with the end cover 10, thereby reducing the internal short circuit of the battery and improving the safety of the battery. Since the first flange 112 and the second flange 113 are disposed along four edges of the insulating plate main body 111, the first flange 112 and the second flange 113 can also serve as a reference system for defining the disposition position of the interposer 12 on the insulating plate 11.
In the present application, the minimum distances from the edge of each interposer 12 to the inner edges of the two first flanges 112 are D1 and D1', respectively, 0.05. Ltoreq. D1. Ltoreq.300 mm and 0.05. Ltoreq. D1'. Ltoreq.300 mm.
In the connection of the tab and the interposer 12, a part of the tab is overlapped with the interposer 12 and welded, and meanwhile, the other part of the tab (which is not overlapped with the interposer 12) is located on one side of the interposer 12 close to the first flange 112, and the other part of the tab is bent along the outer edge of the interposer 12 close to the first flange 112, so as to complete the connection of the tab and the interposer 12.
In the process of connecting the tab with the adapter plate 12, although other parts of the tab are bent along the outer edge of the adapter plate 12, the tab always has a smaller thickness, and the tab extends out of the edge of the adapter plate 12 for a certain distance at the bent position.
Therefore, the minimum distance D1 and D1' between the edge of the interposer 12 and the inner edge of the first flange 112 is set to be at least 0.05mm, so that a sufficient gap can be reserved between the interposer 12 and the first flange 112 for bending the tab, and the bending line of the bent tab is prevented from abutting against the first flange 112, thereby preventing the tab from being connected to the interposer 12 to cause offset or driving the interposer 12 to generate offset on the insulating plate 11.
Meanwhile, the minimum distances D1 and D1' between the edge of the adapter sheet 12 and the inner edge of the first flange 112 are not more than 300mm, so that the arrangement position of the adapter sheet 12 between the two first flanges 112 has a larger range, namely, the arrangement position of the adapter sheet 12 on the insulating plate 11 has a larger adjustment range, when the position of the tab changes, the arrangement position of the adapter sheet 12 can be correspondingly adjusted, and the adapter sheet 12 can be ensured to be corresponding to the tab.
In addition, the minimum distance from the edge of each adapter plate 12 to the inner edge of the adjacent second flange 113 is D2, and D2 is more than or equal to 0.05 and less than or equal to 10mm.
It is understood that the battery temperature is easily increased when the battery is used for a long time, and the insulating plate 11 is easily expanded by heat when the battery temperature is high.
Therefore, by setting the minimum distance (i.e., D1' and D2) from the edge of the interposer 12 to the inner edge of the first flange 112 and the inner edge of the second flange 113 adjacent to the first flange to be greater than 0.05mm, a buffer gap of 0.05mm is provided between the interposer 12 and the first flange 112 and the second flange 113 adjacent to the first flange, and when the first flange 112 or the second flange 113 expands, the interposer 12 is not pressed, and the stable setting position of the interposer 12 is ensured. And the minimum distance D2 from the edge of the adapter sheet 12 to the edge of the adjacent second flange 113 is not more than 10mm, so that the two adapter sheets 12 are respectively close to the two different second flanges 113, thereby ensuring that an enough gap exists between the two adapter sheets 12, avoiding the short circuit of the battery caused by the contact of the two adapter sheets 12 and improving the safety of the battery.
The battery end cover assembly 100 has the advantages that the arrangement position of the switching piece 12 on the insulating plate 11 has a large adjustable range, the corresponding arrangement of the switching piece 12 and the pole lug can be guaranteed, the poor contact condition of the switching piece 12 and the pole lug is reduced or avoided in the assembly of the battery end cover assembly 100, and the defective product proportion of the battery end cover assembly 100 is reduced. Meanwhile, after the adapter sheet 12 is connected to the insulating plate 11, the setting position of the adapter sheet 12 is not easy to deviate, and an enough gap is formed between the two adapter sheets 12, so that the short circuit risk between the pole lugs or between the adapter sheets 12 caused by the deviation of the adapter sheet 12 is reduced or avoided, and the safety of the battery is improved.
In some embodiments, as shown in fig. 2, the interposer 12 includes a post land 121, the post land 121 having a dimension L1 along a width direction of the end cap 10, and the post land 121 having a dimension L2 along a length direction of the end cap 10.
It will be appreciated that the post land 121 is located on the interposer 12, i.e. a portion of the interposer 12 is located between the post land 121 and the first flange 112 and its adjacent second flange 113. Since the interposer 12 is connected to the electrode post by welding at the electrode post welding area 121, the interposer 12 can have a certain rigidity at the electrode post welding area 121.
In the present embodiment, the minimum distances from the edge of the post welding region 121 to the inner edges of the two first flanges 112 are W1 and W1',2 × l1 is equal to or less than W1 and equal to or less than 10 × l1, and 2 × l1 is equal to or less than W1' and equal to or less than 10 × l1, respectively. Meanwhile, the minimum distance from the edge of the post welding area 121 to the inner edge of the second flange 113 adjacent thereto is W2, and 2 × l2 ≦ W2 ≦ 10 × l2.
Therefore, by setting the minimum distances W1 and W1' from the edge of the pole welding area 121 to the inner edges of the two first flanges 112 to be at least 2 times of the dimension L1 of the pole welding area 121 in the width direction of the end cover 10, it is ensured that a part of the interposer 12 can be positioned between the pole welding area 121 and the first flanges 112, which is convenient for the position arrangement of the interposer 12 on the insulating plate 11. Meanwhile, a sufficient gap is formed between the pole welding area 121 and the first flange 112, so that the blocking influence of the first flange 112 on the welding operation during pole welding can be reduced or avoided, and the welding effect is ensured.
Meanwhile, the minimum distances W1 and W1' from the edge of the post welding area 121 to the inner edges of the two first flanges 112 do not exceed 10 times of the dimension L1 of the post welding area 121 in the width direction of the end cover 10, so that the part of the adapter sheet 12 between the post welding area 121 and the first flanges 112 is prevented from occupying the whole part of the adapter sheet 12, the adapter sheet 12 is ensured to have certain rigidity integrally, and the bending of the adapter sheet 12 is reduced or avoided.
From this, be convenient for adjust the setting position of switching piece 12 on insulation board 11, can guarantee simultaneously that switching piece 12 and utmost point post have better connection effect, and switching piece 12 non-deformable.
Similarly, the minimum distance W2 from the edge of the terminal welding area 121 to the inner edge of the second flange 113 adjacent to the terminal welding area is at least 2 times of the size L2 of the terminal welding area 121 in the length direction of the end cover 10, and is not more than 10 times of the size L2 of the terminal welding area 121 in the length direction of the end cover 10, so that the setting position of the adapter plate 12 on the insulating plate 11 can be conveniently adjusted, and meanwhile, the adapter plate 12 and the terminal are guaranteed to have a good connection effect, and the adapter plate 12 is not easy to deform.
In this embodiment, the shape of the tab welding region 122 is not limited. For example, in fig. 2, the post land 121 has a circular ring shape, and in this case, L1 and L2 are both sized to be the outer ring diameter of the circular ring. For another example, the post land 121 may be rectangular, and in this case, L1 and L2 may have the length and width of the rectangle, respectively.
In some embodiments, as shown in fig. 3, the interposer 12 includes two tab weld zones 122, the tab weld zone 122 having a dimension L3 along the width of the end cap 10, and the tab weld zone 122 having a dimension L4 along the length of the end cap 10.
In the present embodiment, the minimum distance from the edge of the tab welding region 122 to the inner edge of the first flange 112 adjacent thereto is W3, and 0.3 × l3 ≦ W3 ≦ 2 × l3. Meanwhile, the minimum distance from the edge of the tab welding region 122 to the inner edge of the second flange 113 adjacent thereto is W4, and L4 is not less than W4 and not more than 4 × L4.
It can be understood that the connection stability of the tab and the adaptor sheet 12 is positively correlated to the size of the tab welding area 122, and one adaptor sheet 12 connects two tabs, i.e. two tab welding areas 122 are provided on one adaptor sheet 12.
Therefore, the minimum distance W3 from the edge of the tab welding area 122 to the inner edge of the first flange 112 adjacent to the edge is set to be at least 0.3 times of the dimension L3 of the tab welding area 122 in the width direction of the end cover 10, and when the tab is welded and connected to the adapter sheet 12, a sufficient gap can be ensured between the tab and the first flange 112, so that the tab is conveniently connected to the adapter sheet 12, and the other parts of the tab are conveniently placed after being bent.
Meanwhile, the minimum distance W3 from the edge of the tab welding area 122 to the inner edge of the first flange 112 adjacent to the tab welding area is set to be not more than 2 times of the dimension of the tab welding area 122 in the width direction of the end cover 10, so that the edge of the tab welding area 122 is closer to the edge of the adapter plate 12 close to the first flange 112, and when the tab is bent along the edge of the adapter plate 12 close to the first flange 112, the distance between the bending line of the tab and the edge of the tab welding area 122 is closer, thereby improving the contact stability of the tab and the adapter plate 12.
Similarly, the minimum distance W4 from the edge of the tab welding area 122 to the inner edge of the second flange 113 adjacent to the edge is set to be at least 1 time of the dimension L4 of the tab welding area 122 in the length direction of the end cap 10, and not more than 4 times of the dimension L4 of the tab welding area 122 in the length direction of the end cap 10, so that the connection of the tab on the adaptor plate 12 is facilitated, and the contact stability between the tab and the adaptor plate 12 is improved.
In some embodiments, as shown in fig. 4, the interposer 12 has a thickness h1, the first flange 112 protrudes beyond the main body 111 of the insulating plate by a thickness h2, and the second flange 113 protrudes beyond the main body 111 of the insulating plate by a thickness h3.
It will be appreciated that the first and second flanges 112, 113 project away from the end cap 10 relative to the insulator plate body 111, and that the first and second flanges 112, 113 are located on the inside of the cell when the cell end cap assembly 100 is mounted on the cell, and thus the first and second flanges 112, 113 also act as a stop for the disposition of the cell end cap assembly 100 on the cell.
In the present embodiment, assuming that the length of the first flange 112 is greater than the length of the second flange 113, when the first flange 112 and the second flange 113 play a limiting role for the cell end cap assembly 100, in order to ensure that the force bearing capacities of the first flange 112 and the second flange 113 are close to each other, the thickness h3 of the second flange 113 needs to be greater than the thickness h2 of the first flange 112.
It should be noted that, after the tab is connected to the adaptor sheet 12 and bent, the bent tab has a certain thickness in a direction away from the cover plate relative to the adaptor sheet 12, and the first flange 112 and the second flange 113 protrude toward a side away from the end cap 10 relative to the insulating plate main body 111, and also have an effect of providing a bending space for the folded tab.
The thickness of the part of the first flange 112 protruding out of the insulating plate main body 111 is h2, and h2 is more than or equal to 1.3 × h1 and less than or equal to 8 × h1. Meanwhile, the thickness of the part of the second flange 113 protruding out of the insulating plate main body 111 is h3, and 2 × h1 is not less than h3 and not more than 10 × h1.
Therefore, the thickness h2 of the part, protruding out of the insulating plate main body 111, of the first flange 112 and the thickness h3 of the part, protruding out of the insulating plate main body 111, of the second flange 113 are both set to be larger than the thickness h1 of the adapter sheet 12, so that after the tab is connected to the adapter sheet 12, a sufficient bending space is formed between the adapter sheet 12 and the battery cell, and the tab is stably connected to the adapter sheet 12. And the setting of h3 to be larger than h2 can ensure that the shorter second flange 113 has the bearing capacity similar to that of the longer first flange 112.
In addition, the thickness h2 of the part, protruding out of the insulating plate main body 111, of the first flange 112 is smaller than the thickness h1 of the adaptor sheet 12 which is 8 times, and the thickness h3 of the part, protruding out of the insulating plate main body 111, of the second flange 113 is smaller than the thickness h1 of the adaptor sheet 12 which is 10 times, so that the excessive thickness of the insulating plate 11 can be avoided, and the overall thickness of the battery end cover assembly 100 is reduced. When the cell end cap assembly 100 is assembled to the cell, the cell end cap assembly 100 occupies less space inside the cell, which is beneficial for increasing the energy density of the cell with a limited cell volume.
Further, as shown in fig. 5 and 6, when the end cap 10 is provided with the explosion-proof valve 13, the explosion-proof valve 13 is located between the two adapter pieces 12, and the battery end cap assembly 100 further includes: the protective cover 14 covers the explosion-proof valve 13, the thickness of the part of the protective cover 14 protruding out of the insulating plate main body 111 is h4, and h4 is more than or equal to 1.3 × h1 and less than or equal to h3.
With this structure, the thickness h4 of the portion of the shield cap 14 protruding out of the insulator plate main body 111 does not exceed the thickness h3 of the portion of the second flange 113 protruding out of the insulator plate main body 111, without increasing the overall thickness of the cell end cap assembly 100. And the thickness h4 of the part of the protective cover 14 protruding out of the insulating plate main body 111 is larger than the thickness h1 of the adapter sheet 12, so that the two adapter sheets 12 and the connected pole lugs can be separated, and the short circuit caused by the contact of the two adapter sheets 12 is avoided while the explosion-proof valve 13 is prevented from being covered by the adapter sheets 12.
In some embodiments, as shown in fig. 3, 5 and 7, the cell end cap assembly 100 further comprises: and an explosion-proof valve 13 arranged at the center of the cover plate. The minimum distances from the edges of the two adapter pieces 12 to the edge of the explosion-proof valve 13 are respectively D3 and D4, wherein D3 is more than or equal to 0.1 and less than or equal to 30mm, and D4 is more than or equal to 0.1 and less than or equal to 30mm.
From this, two keysets 12 are separated in the both sides of explosion-proof valve 13, and the distance (D3 and D4) of the edge distance of two keysets 12 to explosion-proof valve 13's edge all is greater than 0.1mm, can avoid keysets 12 to block explosion-proof valve 13 formation, prevents simultaneously that two keysets 12 from contacting and leading to the short circuit.
And the minimum distance (D3 and D4) between the edges of the two adapter pieces 12 and the edge of the explosion-proof valve 13 is smaller than 30mm, and the positions of the adapter pieces 12 correspond to the positions of the electrodes, so that the internal pressure of the battery at the position of the adapter piece 12 is close to that of the battery at the position of the explosion-proof valve 13. When the internal pressure inside the battery at the position of the adapter sheet 12 is overlarge, the explosion-proof valve 13 also receives similar pressure and plays a role in pressure relief, so that the battery is prevented from bursting at the position of the adapter sheet 12, namely the pole.
Further, the insulating plate 11 is a unitary plate, which can facilitate the processing of the insulating plate 11 and simplify the operation of disposing the insulating plate 11 on the end cap 10. The two adapter pieces 12 are symmetrically arranged on the insulating plate 11 relative to the explosion-proof valve 13, the explosion-proof valve 13 is located in the center of the end cover 10, and the two adapter pieces 12 are arranged in the same shape and weight, so that the weight of the battery end cover assembly 100 on the two opposite sides of the explosion-proof valve 13 is relatively even, and the stability of the battery end cover assembly 100 on a battery can be improved.
It should be noted that, as shown in fig. 5, when the explosion-proof valve 13 is covered with the protection cover 14, the minimum distance (D3 and D4) from the edge of the two adapters 12 to the edge of the explosion-proof valve 13 is actually the minimum distance from the edge of the two adapters 12 to the edge of the protection cover 14.
In some embodiments, as shown in fig. 7, the insulating plate 11 includes: the anode insulating plate 11a and the cathode insulating plate 11b are arranged at intervals along the length direction of the cover plate, and the two adapter pieces 12 are respectively connected to the anode insulating plate 11a and the cathode insulating plate 11 b. From this, two keysets 12 are encircleed by anodal insulating board 11a and negative pole insulating board 11b respectively, and explosion-proof valve 13 can be located between anodal insulating board 11a and the negative pole insulating board 11b to can avoid keysets 12 to form to block explosion-proof valve 13, prevent simultaneously that two keysets 12 contact from leading to the short circuit.
It should be noted that, in this embodiment, each first flange 112 is composed of two broken flanges, and the two broken flanges are respectively located on the same side of the positive insulating plate 11a and the negative insulating plate 11 b.
Further, the anode insulating plate 11a and the cathode insulating plate 11b are symmetrically arranged relative to the explosion-proof valve 13, and the two adapter pieces 12 are symmetrically arranged relative to the explosion-proof valve 13. Therefore, by setting the shape and the weight of the positive insulating plate 11a and the negative insulating plate 11b to be consistent, and setting the shape and the weight of the two adapter pieces 12 to be consistent, the weight of the battery end cover assembly 100 on the two opposite sides of the explosion-proof valve 13 can be relatively even, and the stability of the battery end cover assembly 100 on the battery can be improved.
In some embodiments, as shown in fig. 3, 5 and 7, when the interposer 12 is provided with two tab welding areas 122, the tab welding areas 122 have a dimension L4 along the length of the end cap 10. The minimum distances from the edges of the lug welding areas 122 on the two adapter plates 12 to the edge of the anti-explosion valve 13 are W5 and W6 respectively, W5 is more than or equal to L4 and less than or equal to 5 × L4, and W6 is more than or equal to L4 and less than or equal to 5 × L4.
In the scheme, the minimum distances W5 and W6 from the edge of the lug welding area 122 to the edge of the explosion-proof valve 13 are at least 1 time of the size L4 of the lug welding area 122 in the length direction of the end cover 10, so that a sufficient gap is formed between the lug welding area 122 and the explosion-proof valve 13, and when the lug is welded on the adapter plate 12, the lug cannot block the explosion-proof valve 13. Meanwhile, the explosion-proof valve 13 does not affect the welding operation in the tab welding area 122, so as to ensure the welding effect of the tab and the adapter plate 12.
And the minimum distances W5 and W6 from the edge of the tab welding area 122 to the edge of the explosion-proof valve 13 are set to be not more than 5 times of the size L4 of the tab welding area 122 in the length direction of the end cover 10, so that the proportion of the tabs between the tab welding area 122 and the explosion-proof valve 13 in the whole tabs is small, and after the tabs are welded with the adapter plate 12, the parts between the tab welding area 122 and the explosion-proof valve 13, which are not welded with the tabs, are not easy to move, and the welding and fixing effects of the tabs on the adapter plate 12 are ensured.
It should be noted that, as shown in fig. 5, when the explosion-proof valve 13 is covered with the protection cover 14, the minimum distance (W5 and W6) from the edge of the two tab welding areas 122 to the edge of the explosion-proof valve 13 is actually the minimum distance from the edge of the two adaptors 12 to the edge of the protection cover 14.
In some embodiments, the insulating plate 11 is provided with a limiting portion (not shown) corresponding to the adaptor plate 12. Under such a structure, the limiting part is convenient for positioning the setting position of the adapter sheet 12 on the insulating plate 11, and is convenient for installing the adapter sheet 12 on the battery end cover assembly 100. And after the switching piece 12 is welded with the pole and the pole ear, the limiting column can also prevent the switching piece 12 from moving along the insulating plate main body 111, and the stability of the switching piece 12 arranged on the insulating plate 11 is improved.
An energy storage device according to an embodiment of the invention includes the cell end cap assembly 100 of the above-described embodiment.
The energy storage device of this application, through adopting the battery end cover subassembly 100 of above-mentioned embodiment, can guarantee the setting of correspondence of switching piece 12 and utmost point ear, in the assembly of battery end cover subassembly 100, reduce or avoid switching piece 12 and the condition of utmost point ear contact failure, reduce the defective products proportion of battery end cover subassembly 100. Meanwhile, the short circuit risk in the energy storage device can be reduced or avoided, and the safety of the energy storage device is improved.
The electric equipment provided by the embodiment of the invention comprises the energy storage device provided by the embodiment of the invention.
The electric equipment of this application, through adopting the energy memory of above-mentioned embodiment, can reduce or avoid the short circuit risk in the electric equipment, improve electric equipment's security.
Other constructions and operations of the battery end cap assembly 100, the energy storage device, and the powered device according to embodiments of the invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. A battery end cap assembly, comprising:
an end cap (10);
the insulating plate (11), the said insulating plate (11) is connected to one side of the said end cap (10);
the two adapter pieces (12) are arranged on one side, far away from the end cover (10), of the insulating plate (11), and the two adapter pieces (12) are arranged at intervals along the length direction of the end cover (10);
wherein the insulating plate (11) comprises: the insulating plate comprises an insulating plate main body (111), two first flanges (112) and two second flanges (113), wherein the two first flanges (112) are connected to two opposite sides of the insulating plate main body (111), the two second flanges (113) are connected to the other two opposite sides of the insulating plate main body (111), and the first flanges (112) and the second flanges (113) are protruded towards one side far away from the end cover (10) relative to the insulating plate main body (111);
the minimum distance from the edge of each adapter sheet (12) to the inner edges of the two first flanges (112) is respectively D1 and D1', D1 is more than or equal to 0.05 and less than or equal to 300mm, and D1' is more than or equal to 0.05 and less than or equal to 300mm;
the minimum distance from the edge of each adapter sheet (12) to the inner edge of the second flange (113) adjacent to the edge is D2, and D2 is more than or equal to 0.05 and less than or equal to 10mm.
2. The battery end cap assembly of claim 1, wherein the interposer (12) includes a post weld area (121), the post weld area (121) having a dimension L1 along a width direction of the end cap (10), the post weld area (121) having a dimension L2 along a length direction of the end cap (10);
the minimum distances from the edge of the pole welding area (121) to the inner edges of the two first flanges (112) are W1 and W1',2 L1 is not less than W1 and not more than 10 L1, and 2 L1 is not less than W1' and not more than 10 L1 respectively;
the minimum distance from the edge of the pole welding area (121) to the inner edge of the second flange (113) adjacent to the edge is W2, and W2 is more than or equal to 2 and L2 is less than or equal to 10 and L2.
3. The battery end cap assembly of claim 1, wherein the tab (12) includes two tab weld areas (122), the tab weld area (122) having a dimension L3 along the width of the end cap (10), the tab weld area (122) having a dimension L4 along the length of the end cap (10);
the minimum distance from the edge of the tab welding area (122) to the inner edge of the first flange (112) adjacent to the edge is W3, and W3 is more than or equal to 0.3 and less than or equal to 2 and less than or equal to L3;
the minimum distance from the edge of the tab welding area (122) to the inner edge of the second flange (113) adjacent to the edge is W4, and L4 is not less than W4 and not more than 4 L4.
4. The battery end cap assembly of claim 1, wherein the interposer (12) has a thickness h1;
the thickness of the part of the first flange (112) protruding out of the insulating plate main body (111) is h2, and h2 is more than or equal to 1.3 × h1 and less than or equal to 8 × h1;
the thickness of the part of the second flange (113) protruding out of the insulating plate main body (111) is h3, and 2 × h1 is not less than h3 and not more than 10 × h1.
5. The battery end cap assembly of any of claims 1-4, further comprising: an explosion-proof valve (13) arranged in the center of the cover plate; wherein the content of the first and second substances,
the minimum distances from the edges of the two adapter pieces (12) to the edge of the explosion-proof valve (13) are respectively D3 and D4, wherein D3 is more than or equal to 0.1 and less than or equal to 30mm, and D4 is more than or equal to 0.1 and less than or equal to 30mm.
6. The battery end cap assembly of claim 5, wherein the insulating plate (11) is a unitary plate, and the two adapter pieces (12) are symmetrically arranged on the insulating plate (11) relative to the explosion-proof valve (13).
7. The battery end cap assembly of claim 5, wherein the insulator plate (11) comprises: the cover plate comprises a positive insulating plate (11 a) and a negative insulating plate (11 b), wherein the positive insulating plate (11 a) and the negative insulating plate (11 b) are arranged at intervals along the length direction of the cover plate, and the two adapter pieces (12) are respectively connected to the positive insulating plate (11 a) and the negative insulating plate (11 b).
8. The battery end cap assembly of claim 7, wherein the positive insulating plate (11 a) and the negative insulating plate (11 b) are symmetrically disposed with respect to the explosion-proof valve (13), and the two tabs (12) are symmetrically disposed with respect to the explosion-proof valve (13).
9. The battery end cap assembly of claim 5, when said tabs (12) are provided with two tab weld areas (122), said tab weld areas (122) having a dimension L4 along the length of said end cap (10);
the minimum distances from the edges of the two lug welding areas (122) to the edge of the explosion-proof valve (13) are W5 and W6 respectively, W5 is not less than L4 and not more than 5L 4, and W6 is not less than L4 and not more than 5L 4.
10. The battery end cap assembly according to any one of claims 1-4, wherein a limiting part is arranged on the insulating plate (11) corresponding to the adapter sheet (12).
11. An energy storage device, comprising: the battery end cap assembly (100) of any of claims 1-10.
12. An electrical consumer, characterized in that it comprises an energy storage device according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211412097.8A CN115663363B (en) | 2022-11-11 | 2022-11-11 | Battery end cover assembly, energy storage device and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211412097.8A CN115663363B (en) | 2022-11-11 | 2022-11-11 | Battery end cover assembly, energy storage device and electric equipment |
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| CN115663363A true CN115663363A (en) | 2023-01-31 |
| CN115663363B CN115663363B (en) | 2023-12-22 |
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| CN115663363B (en) | 2023-12-22 |
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