Collecting plate device, battery, battery device and electric equipment

Abstract

The utility model provides a current collecting plate device, a battery, a battery device and electric equipment, and relates to the technical field of batteries, the current collecting plate device comprises a first current collecting plate, a second current collecting plate and a third current collecting plate, the first collector plate layer is electrically connected with the first collector plate, the second collector plate is electrically connected with the first collector plate layer, the second collector plate is used for being electrically connected with a cover plate assembly, the first collector plate comprises a first flange, the second collector plate comprises a second flange, and the first flange and the second flange are suitable for being electrically connected. According to the collector plate device provided by the embodiment of the invention, the phenomenon that the bottom wall of the groove of the cover plate assembly is easily missed by welding, so that liquid in the battery leaks from the missed welding position can be avoided, and the yield of the battery, the use safety of the battery and the use safety of electric equipment are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and in particular to a current collector disc device, a battery, a battery device and an electrical equipment. BACKGROUND

[0002] During the assembly process of the battery, the battery cell needs to be connected to the cover plate assembly through the current collector disc. In the related art, the inner lead of the battery cell can be first welded to the current collector disc, and then the cover plate assembly is welded to the current collector disc to realize the electrical conduction of the battery cell, the current collector disc and the cover plate assembly.

[0003] In order to facilitate the welding process of the cover plate assembly and the current collector disc, a groove needs to be formed on the side of the cover plate assembly away from the current collector disc, and laser penetration welding is performed from the bottom wall of the groove on the cover plate assembly to the current collector disc.

[0004] However, the bottom wall of the groove on the cover plate assembly in the related art is prone to welding leakage, which causes the liquid inside the battery to leak from the position of the welding leakage, thereby reducing the yield of the battery and reducing the use safety of the battery. CONTENT OF THE UTILITY MODEL

[0005] The embodiments of the present application provide a current collector disc device, a battery, a battery device and an electrical equipment, which are used to solve the technical problem that the bottom wall of the groove on the cover plate assembly in the related art is prone to welding leakage, which causes the liquid inside the battery to leak from the position of the welding leakage, thereby reducing the yield of the battery and reducing the use safety of the battery.

[0006] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the embodiments of the present application provides a current collector disc device, which comprises: a first current collector disc, the first current collector disc being used to be electrically connected with a battery cell assembly; a second current collector disc, the second current collector disc being electrically connected with the first current collector disc, and the second current collector disc being used to be electrically connected with a cover plate assembly;

[0008] The first current collector disc comprises a first flange, and the second current collector disc comprises a second flange; the first flange and the second flange are adapted to be electrically connected.

[0009] The embodiments of the present application provide a current collector disc device, which comprises two current collector discs, and the second current collector disc is welded to the cover plate assembly on the cover plate assembly before being welded to the first current collector disc on the battery cell assembly.

[0010] In this way, the welding process of the first current collector disc and the second current collector disc is simplified by welding the first current collector disc and the second current collector disc through the first flange and the second flange, which facilitates the welding operation.

[0011] Welding and sealing the first current collector disc and the second current collector disc along the circumferential direction of the first current collector disc and the second current collector disc can reduce the risk of liquid leakage from the connection between the first current collector disc and the second current collector disc.

[0012] Furthermore, the first current collector disc and the second current collector disc are connected through the connection between the first flange and the second flange, which can increase the connection area between the first current collector disc and the second current collector disc, further improve the connection stability between the first current collector disc and the second current collector disc, and the welding sealing performance.

[0013] In this way, on the one hand, the bottom wall of the groove on the cover plate assembly is easy to be welded, thereby avoiding the risk of liquid leakage from the cover plate assembly to the outside of the battery. On the other hand, the second current collector disc is located inside the shell after the battery is assembled, and even if the second current collector disc is welded, it will not cause the liquid in the battery cell assembly to leak from the second current collector disc, further reducing the risk of liquid leakage from the welding.

[0014] On the basis of the above technical solutions, the present application can also be improved as follows.

[0015] In one possible implementation, the first current collector disc further comprises a first disc body, and the first flange is arranged at the periphery of the first disc body and connected to the first disc body at an angle;

[0016] The second current collector disc further comprises a second disc body, and the second flange is arranged at the periphery of the second disc body and connected to the second disc body at an angle, and the first flange is adapted to contact the second flange and be connected through welding.

[0017] In one possible implementation, a plurality of welding points are further included; and the first flange and the second flange have a spacing therebetween;

[0018] The welding points are arranged in the spacing between the first flange and the second flange, and the first flange and the second flange are connected through the welding points.

[0019] In this way, by arranging a spacing between the first flange and the second flange and welding the first flange and the second flange through the welding points, and by arranging multiple welding points with a spacing, the connection stability between the first flange and the second flange can be increased, and the first flange and the second flange can be prevented from being separated.

[0020] In one possible implementation, the thickness of the first flange is less than the thickness of the second flange.

[0021] Thus, the laser penetration welding can be facilitated by the outer side of the first flange to the second flange, the difficulty of melting through can be reduced, the weldability can be improved, and the problem of false welding can be avoided.

[0022] The thickness of the first disc body is less than or equal to the thickness of the second disc body.

[0023] Thus, the material for manufacturing the first current collecting disc can be saved, the manufacturing cost of the battery can be reduced, and the thickness of the first flange after being bent on the first current collecting disc can be lower than the thickness of the second flange after being bent on the outer edge of the second current collecting disc, so that the weldability and welding stability between the first current collecting disc and the second current collecting disc can be improved.

[0024] In a possible implementation, the first flange surrounds the outer side of the second flange, the outer surface of the first flange is provided with a welding groove, the groove opening of the welding groove faces the outer side of the first flange, the groove bottom of the welding groove abuts against the surface of the second flange, and the groove bottom of the welding groove is welded to the second flange.

[0025] Thus, the first flange can abut against the surface of the second flange through the groove bottom of the welding groove, the connection tightness between the groove bottom of the welding groove and the second flange can be improved due to the abutment of the groove bottom against the second flange, so as to reduce the probability of false welding when welding is performed at the groove bottom of the welding groove, and the welding tightness between the first flange and the second flange can be improved.

[0026] The first flange and the second flange are both annular, the welding groove is an annular groove, and the annular groove is arranged on the outer circumferential side of the first flange.

[0027] Thus, if the first flange and the second flange are both annular, the welding groove is arranged as an annular groove, the outer surface of the second flange can be abutted against by the groove bottom wall along the circumference of the second flange, and thus the welding tightness between the first flange and the second flange along the circumference of the second flange can be improved.

[0028] In a possible implementation, a plurality of notches are arranged on the first flange, the notches are arranged at intervals along the circumference of the first flange, and the notches extend along the height direction of the first flange.

[0029] Thus, the first flange is more likely to deform by arranging the notches on the first flange, so that the second flange can be conveniently pressed into the wrapping range of the first flange when the second current collecting disc is assembled with the first current collecting disc, the assembly efficiency of the first current collecting disc and the second current collecting disc is improved, and thus the assembly efficiency of the battery can be improved.

[0030] In a possible implementation, the first current collecting disc and the second current collecting disc are arranged in a stacked manner, and in the stacking direction of the first current collecting disc and the second current collecting disc, the end of the second flange away from the second disc body is flush with the end of the first flange away from the first disc body.

[0031] In this way, compared with the case where only the first flange or the second flange abuts against the cover plate assembly, by enabling the end of the first flange away from the first disc body and the end of the second flange away from the second disc body to abut against the surface of the cover plate assembly, the first flange and the second flange can both support the cover plate assembly, the support stability of the cover plate assembly is improved, and the probability of deformation of the first flange and the second flange caused by extrusion of the cover plate assembly is reduced, thereby improving the structural stability of the battery.

[0032] In the thickness direction of the second disc body, the height of the second flange is greater than or equal to 1 mm and less than or equal to 3 mm.

[0033] By setting the height of the second flange to be greater than or equal to 1 mm and less than or equal to 3 mm, while ensuring a large welding area between the first flange and the second flange, the height of the first flange and the second flange is limited to be not too high, the manufacturing cost of the first current collecting disc and the second current collecting disc is avoided to be too high, and the manufacturing cost of the battery is reduced.

[0034] In a possible implementation, the first disc body is provided with a protruding rib, and the protruding rib is used to electrically connect with the battery cell assembly.

[0035] In this way, by abutting the protruding rib against the battery cell assembly and performing laser penetration welding from the area of the first disc body where the protruding rib is located to the battery cell assembly, the probability of virtual welding at the welding position between the first current collecting disc and the battery cell assembly is reduced, and the welding stability and the overcurrent stability between the first current collecting disc and the battery cell assembly are improved.

[0036] In a possible implementation, the protruding rib has a plurality of protruding ribs, and the plurality of protruding ribs are spaced and uniformly arranged in the axial direction of the first disc body.

[0037] In this way, by arranging a plurality of protruding ribs, the welding area between the first disc body and the battery cell assembly can be increased, and the uniformity of contact between the first current collecting disc and the battery cell assembly can be increased, so that the welding area can be increased while the uniformity and stability of welding and the overcurrent capacity between the battery cell assembly and the cover plate assembly can be increased.

[0038] In a possible implementation, the second disc body (250) is provided with a positioning hole for positioning connection with the cover plate assembly (30).

[0039] In this way, by means of the positioning hole formed on the second current collector plate, the cover plate assembly and the positioning hole can be connected in position, so as to improve the assembly efficiency between the cover plate assembly and the second current collector plate.

[0040] In a possible implementation, the second current collector plate further has a protruding portion protruding towards the cover plate assembly, and the protruding portion is used to abut against the surface of the cover plate assembly facing the battery cell assembly.

[0041] In this way, by means of the protruding portion, the second current collector plate can abut against the cover plate assembly when the length of the cover plate assembly is short, so as to facilitate the welding between the second current collector plate and the cover plate assembly in the region of the protruding portion.

[0042] In a possible implementation, the first current collector plate is provided with a first through hole, and the second current collector plate is provided with a second through hole, and the first through hole and the second through hole are at least partially communicated in the thickness direction of the first current collector plate.

[0043] In this way, by means of the first through hole formed on the first current collector plate and the second through hole formed on the second current collector plate, the electrolyte can enter the battery cell assembly through the first through hole and the second through hole. By means of the at least partial communication between the first through hole and the second through hole in the thickness direction of the first current collector plate, the battery cell assembly can be kept in communication with the side of the second current collector plate away from the battery cell assembly through the overlapping part of the first through hole and the second through hole, so as to ensure that the electrolyte can flow into the battery cell assembly through the first through hole and the second through hole at any time.

[0044] The second aspect of the embodiment of the present application provides a battery, which comprises a cover plate assembly, a battery cell assembly, and the current collector device described above, and the current collector device is located between the cover plate assembly and the battery cell assembly.

[0045] In this way, by means of the current collector device described above, the liquid leakage inside the battery can be reduced, and the safety of the battery can be improved.

[0046] In a possible implementation, the battery cell assembly comprises a battery cell and an inner lead-out piece electrically connected to the battery cell, and the inner lead-out piece is electrically connected to the first current collector plate in the current collector device; the cover plate assembly comprises a cover plate and an outer lead-out piece penetrating through the cover plate, and the outer lead-out piece is electrically connected to the second current collector plate in the current collector device.

[0047] In a possible implementation, the second current collector plate in the current collector device is used to connect the outer lead-out piece by means of a penetrating welding.

[0048] In this way, by connecting the second collector plate to the outer lead-out member through penetration welding from the side of the second collector plate facing away from the outer lead-out member, the risk of the bottom wall of the groove being welded through and leaking can be avoided in the prior art, which involves opening a groove on the outer lead-out member and performing penetration welding from the side where the bottom wall of the groove is located to the collector plate.

[0049] A third aspect of this application provides a battery device comprising the battery described above.

[0050] A fourth aspect of this application provides an electrical device, which includes an electrical device and a battery, as well as a battery or a battery device as described above, wherein the battery or battery device is used to provide electrical energy to the electrical device.

[0051] In this way, by using the aforementioned batteries to provide power to electrical devices, the safety of using electrical devices can be improved. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the structure of a battery provided in an embodiment of this application;

[0054] Figure 2 This is a schematic diagram of the structure of a manifold device provided in an embodiment of this application;

[0055] Figure 3 for Figure 2 A cross-sectional schematic diagram of the manifold device in the diagram;

[0056] Figure 4 A schematic diagram of the structure of the first type of first collector disk provided in the embodiments of this application;

[0057] Figure 5 This is a schematic diagram of the structure of the second type of first collector disk provided in the embodiments of this application;

[0058] Figure 6 A schematic diagram of the structure of the third type of first collector disk provided in the embodiments of this application;

[0059] Figure 7 A schematic diagram of the structure of the fourth type of first collector disk provided in the embodiments of this application;

[0060] Figure 8 This is a schematic diagram of the structure of a first type of second collector disk provided in an embodiment of this application;

[0061] Figure 9 A second structure diagram of a second current collecting disc provided in an embodiment of the present application is shown in FIG. 2B.

[0062] Figure 10 A third structure diagram of a second current collecting disc provided in an embodiment of the present application is shown in FIG. 2C.

[0063] Explanation of reference numerals:

[0064] 10 - current collecting disc device; 20 - battery cell assembly; 30 - cover plate assembly; 40 - external lead-out piece; 50 - shell;

[0065] 21 - battery cell; 22 - internal lead-out piece; 31 - cover plate; 32 - insulating piece; 41 - positioning protrusion;

[0066] 51 - opening;

[0067] 100 - first current collecting disc;

[0068] 110 - first flange; 120 - welding groove; 130 - protruding rib; 140 - first through hole;

[0069] 150 - first disc body;

[0070] 111 - notch;

[0071] 200 - second current collecting disc;

[0072] 210 - second flange; 220 - positioning hole; 230 - protruding part; 240 - second through hole;

[0073] 250 - second disc body. DETAILED DESCRIPTION

[0074] The bottom wall of the groove on the cover plate assembly in the related art is prone to be missed in welding, causing the liquid inside the battery to leak from the missed welding position, thereby reducing the yield of the battery and lowering the use safety of the battery.

[0075] The reason for this problem is that the current collecting disc in the related art needs to be welded on the internal lead-out piece of the battery cell first, which can be an internal lead-out piece, and then the combination structure of the external lead-out piece (for example, the external lead-out piece is an external lead-out piece) and the cover plate assembly is welded with the current collecting disc. This will cause the external lead-out piece to be welded with the current collecting disc, and the laser penetration welding is performed on the side of the external lead-out piece facing away from the current collecting disc. Since the thickness of the external lead-out piece in the height direction is too large to facilitate the laser penetration welding, a groove is needed to be opened on the side of the external lead-out piece facing away from the current collecting disc to reduce the wall thickness of the external lead-out piece, and the laser penetration welding can be performed on the area corresponding to the groove bottom of the groove to the current collecting disc.

[0076] In the above laser penetration welding process, the groove bottom of the groove on the outer lead-out piece is too thin, which may cause welding leakage, and thus the electrolyte in the battery may leak from the welding leakage position on the outer lead-out piece to the outside of the battery, resulting in a decrease in the yield of the battery and a decrease in the safety of the battery.

[0077] In addition, since the outer lead-out piece itself is small in size, the groove formed on the outer lead-out piece is also small in size, which may result in a small welding area between the outer lead-out piece and the current collecting plate, which may affect the welding stability between the current collecting plate and the inner lead-out piece, and may also affect the current carrying capacity between the current collecting plate and the outer lead-out piece.

[0078] To solve the above technical problems, the embodiments of the present application provide a current collecting plate device, a battery, a battery device and an electrical equipment. The current collecting plate device comprises two current collecting plates. Before the second current collecting plate is welded with the first current collecting plate on the battery assembly, the second current collecting plate is welded with the cover plate assembly, and the first current collecting plate is welded with the battery assembly.

[0079] In this way, on the one hand, the groove is not formed on the cover plate assembly, and the laser penetration welding is performed on the current collecting plate from the side where the bottom wall of the groove is located, so that the bottom wall of the groove on the cover plate assembly is not easily welded, and thus the risk that the liquid in the battery assembly leaks to the outside of the battery through the welding leakage position on the cover plate assembly is avoided. On the other hand, the second current collecting plate is located in the shell after the battery is assembled. Even if the second current collecting plate is welded, the liquid in the battery assembly will not leak to the outside of the battery through the welding leakage position on the second current collecting plate, which further reduces the probability of liquid leakage through the welding leakage position. It can be understood that the liquid in the battery assembly is electrolyte.

[0080] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0081] With reference to Figure 1 , Figure 2 and Figure 3 , the embodiments of the present application provide a current collecting plate device 10, which can include a first current collecting plate 100 and a second current collecting plate 200. The first current collecting plate 100 is used to be electrically connected with a battery assembly 20, for example, an inner lead-out piece 22 of the battery assembly 20.

[0082] The second current collector plate 200 is stacked and electrically connected with the first current collector plate 100, and is located on the side of the first current collector plate 100 away from the battery cell assembly 20. The second current collector plate 200 is used to be electrically connected with the cover plate assembly 30, for example, the second current collector plate 200 is used to be electrically connected with the outer lead-out piece 40 of the cover plate assembly 30, so that the inner lead-out piece 22 and the outer lead-out piece 40 are conducted through the first current collector plate 100 and the second current collector plate 200.

[0083] In some embodiments, the first current collector plate 100 and the inner lead-out piece 22 can be connected by welding, the second current collector plate 200 and the outer lead-out piece 40 can also be connected by welding, and the first current collector plate 100 and the second current collector plate 200 can also be connected by welding.

[0084] In specific implementation, the first current collector plate 100 and the inner lead-out piece 22 can be welded by laser penetration welding, the second current collector plate 200 and the outer lead-out piece 40 can also be welded by laser penetration welding, and the first current collector plate 100 and the second current collector plate 200 can also be welded by laser penetration welding. When the second current collector plate 200 is welded with the outer lead-out piece 40, the laser penetration welding equipment can penetrate the second current collector plate 200 and the outer lead-out piece 40 in turn from the surface of the second current collector plate 200 away from the outer lead-out piece 40, so as to weld the second current collector plate 200 with the outer lead-out piece 40.

[0085] In some embodiments, the above-mentioned penetration welding method also includes penetration welding methods other than laser penetration welding.

[0086] The embodiment of the present application provides a current collector plate device 10, which is connected by two current collector plates, and the second current collector plate 200 is welded with the outer lead-out piece 40 of the cover plate assembly 30 before being welded with the inner lead-out piece 22 and the first current collector plate 100, the first current collector plate 100 is welded with the inner lead-out piece 22, and then the second current collector plate 200 is welded with the first current collector plate 100.

[0087] In this way, on the one hand, the recess can be avoided to be formed on the outer lead-out piece 40 in the prior art, and the laser penetration welding is implemented from the side where the bottom wall of the recess is located to the current collector plate, so that the bottom wall of the recess on the outer lead-out piece 40 is not easily welded, and the risk that the liquid in the battery cell assembly 20 leaks to the outside of the battery through the welded leakage of the outer lead-out piece 40 is avoided. On the other hand, the second current collector plate 200 is located inside the shell 50 after the battery is assembled, and even if the second current collector plate 200 is welded, it will not cause the liquid in the battery cell assembly 20 to leak from the welded leakage of the second current collector plate 200 to the battery, further reducing the probability of liquid leakage from the welded leakage.

[0088] Referring to Figure 2 In some embodiments, the second current collecting plate 200 is connected to the cover plate assembly 30 by laser penetration welding from the side of the second current collecting plate 200 facing away from the cover plate assembly 30.

[0089] In this way, by connecting the second current collecting plate 200 to the outer lead-out piece 40 by laser penetration welding from the side of the second current collecting plate 200 facing away from the cover plate assembly 30, the risk of the bottom wall of the groove being welded through can be avoided in the prior art, in which a groove is provided on the outer lead-out piece 40, and laser penetration welding is performed on the current collecting plate from the side where the bottom wall of the groove is located.

[0090] Referring to Figure 2 And Figure 3 In some embodiments, the first current collecting plate 100 can include a first flange 110, and the second current collecting plate 200 can include a second flange 210, the first flange 110 being arranged outside the second flange 210, and the first flange 110 and the second flange 210 being in abutment. The first flange 110 and the second flange 210 are adapted to be welded. For example, the first flange 110 is connected to the second flange 210 by laser penetration welding from the outside of the first flange 110.

[0091] In some embodiments, the first flange 110 and the second flange 210 can also be connected by adhesion, and the material used for adhesion of the first flange 110 and the second flange 210 can be a conductive material. Alternatively, the first flange 110 and the second flange 210 can also be connected by riveting. And the electrical connection between the first flange 110 and the second flange 210 needs to be ensured.

[0092] In this way, the first current collecting plate 100 and the second current collecting plate 200 are welded and sealed along the circumferential direction of the first current collecting plate 100 and the second current collecting plate 200, which can reduce the risk of liquid leakage from the connection between the first current collecting plate 100 and the second current collecting plate 200.

[0093] Furthermore, the first current collecting plate 100 and the second current collecting plate 200 are connected by the connection between the first flange 110 and the second flange 210, which can increase the welding area between the first current collecting plate 100 and the second current collecting plate 200, further improve the connection stability between the first current collecting plate 100 and the second current collecting plate 200, and the welding and sealing performance.

[0094] In some embodiments, the thickness of the first flange 110 can be the same as the thickness of the second flange 210.

[0095] In a possible implementation, a plurality of welding points can be further included, and the first flange 110 and the second flange 210 have a spacing therebetween. The welding points are arranged in the spacing between the first flange 110 and the second flange 210, and the first flange 110 and the second flange 210 are connected by the welding points.

[0096] In some embodiments, the plurality of welding points can be arranged in a spacing, and if the first flange 110 and the second flange 210 are annular, the plurality of welding points can be arranged in a circumferential spacing.

[0097] In this way, by arranging a spacing between the first flange 110 and the second flange 210 and welding the first flange 110 and the second flange 210 by the welding points, and the welding points are arranged in a plurality of spaced arrangements, the connection stability between the first flange 110 and the second flange 210 can be increased, and the first flange 110 and the second flange 210 can be prevented from being separated.

[0098] Reference Figure 2 and Figure 3 In some embodiments, the first current collector 100 can further include a first disc body 150, and the first flange 110 is arranged at the periphery of the first disc body 150 and connected at an angle with the first disc body 150, and the first disc body 150 can be welded and connected with the battery cell assembly 20.

[0099] The second current collector 200 can further include a second disc body 250, and the second flange 210 is arranged at the periphery of the second disc body 250 and connected at an angle with the second disc body 250, and the first flange 110 is adapted to contact the second flange 210 and connected by welding, and the second disc body 250 can be welded and connected with the cover plate assembly 30.

[0100] Reference Figure 3 In some embodiments, the thickness of the first flange 110 is less than the thickness of the second flange 210. Optionally, the thickness of the first flange 110 can be two-thirds of the thickness of the second flange 210. It can be understood that the thickness of the first flange 110 refers to the thickness of the structure of the first flange 110 from the inner side wall to the outer side wall. The thickness of the second flange 210 refers to the thickness of the structure of the second flange 210 from the inner side wall to the outer side wall.

[0101] In this way, it is convenient to perform laser penetration welding from the outer side of the first flange 110 to the second flange 210, which can reduce the difficulty of melting and improve the weldability, and avoid the problem of false welding.

[0102] Reference Figure 3 In other embodiments, the thickness of the first disc body 150 is less than or equal to the thickness of the second disc body 250. For example, the thickness of the first disc body 150 can be two-thirds of the thickness of the second disc body 250.

[0103] In this way, the material for manufacturing the first current collecting disc 100 can be saved, the manufacturing cost of the battery can be reduced, and the thickness of the first flange 110 after being bent on the first current collecting disc 100 can be lower than the thickness of the second flange 210 after being bent on the outer edge of the second current collecting disc 200, so that the weldability and welding stability between the first current collecting disc 100 and the second current collecting disc 200 can be improved.

[0104] With reference to Figure 2 and Figure 3 In some embodiments, the first flange 110 is provided with a welding groove 120, the groove opening of the welding groove 120 faces the outer side of the first flange 110, and the groove bottom of the welding groove 120 is convex relative to the surface of the first flange 110 and faces the second flange 210, so that the groove bottom of the welding groove 120 abuts against the surface of the second flange 210, and the groove bottom of the welding groove 120 is welded with the second flange 210.

[0105] In this way, the first flange 110 can abut against the surface of the second flange 210 through the groove bottom of the welding groove 120, and since the groove bottom abuts against the second flange 210, the connection tightness between the groove bottom of the welding groove 120 and the second flange 210 can be improved, so as to reduce the probability of false welding when welding is performed at the groove bottom of the welding groove 120, and improve the welding tightness between the first flange 110 and the second flange 210.

[0106] With reference to Figure 2 and Figure 3 In specific implementation, the first flange 110 and the second flange 210 can both be annular, and the welding groove 120 is an annular groove arranged around the outer circumferential side of the first flange 110.

[0107] In this way, if the first flange 110 and the second flange 210 are both annular, the welding groove 120 is arranged as an annular groove, so that the outer surface of the second flange 210 can be abutted against by the groove bottom wall along the circumferential direction of the second flange 210, and thus the welding tightness between the first flange 110 and the second flange 210 along the circumferential direction of the second flange 210 can be improved.

[0108] With reference to Figure 4 In some embodiments, a plurality of notches 111 are arranged on the first flange 110, the plurality of notches 111 are arranged at intervals along the circumferential direction of the first flange 110, and the notches 111 extend along the height direction (such as the X direction) of the first flange 110. Figure 4 In particular, the plurality of notches 111 can be arranged at intervals and uniformly along the circumferential direction of the first flange 110, so that the stress uniformity of the overall structure of the first flange 110 can be ensured.

[0109] In this way, by setting a notch 111 on the first flange 110, the first flange 110 is more easily deformed, so that when assembling the second current collector 200 with the first current collector 100, the second flange 210 can be easily pressed into the wrapping range of the first flange 110, thereby improving the assembly efficiency of the first current collector 100 and the second current collector 200, and thus improving the assembly efficiency of the battery.

[0110] refer to Figure 3 In some embodiments, the cover assembly 30 can abut against the end of the first flange 110 of the first collector plate 100 and / or the end of the second flange 210 of the second collector plate 200. The first collector plate 100 and the second collector plate 200 are stacked, and in the stacking direction of the first collector plate 100 and the second collector plate 200, the end of the second flange 210 facing away from the second plate body 250 is flush with the end of the first flange 110 facing away from the first plate body 150, so that the cover assembly 30 can abut against the ends of both the first collector plate 100 and the second collector plate 200.

[0111] In this way, compared to the case where only the first flange 110 or the second flange 210 abuts against the cover assembly 30, by enabling both the end of the first flange 110 facing away from the first disc 150 and the end of the second flange 210 facing away from the second disc 250 to abut against the surface of the cover assembly 30, both the first flange 110 and the second flange 210 can support the cover assembly 30, thereby improving the support stability of the cover assembly 30 and reducing the probability of the first flange 110 and the second flange 210 being deformed by the pressure of the cover assembly 30, thus improving the structural stability of the battery.

[0112] refer to Figure 2 and Figure 3 In the thickness direction of the second disc body 250, the height of the second flange 210 (e.g.) Figure 3 (as shown in the figure) is greater than or equal to 1 mm and less than or equal to 3 mm. For example, the height h of the second flange 210 can be one of 1 mm, 2 mm and 2.5 mm, or any point value between 1 mm and 3 mm.

[0113] By making the height of the second flange 210 greater than or equal to 1 mm and less than or equal to 3 mm, it is possible to ensure a large welding area between the first flange 110 and the second flange 210 while limiting the height of the first flange 110 and the second flange 210 to be too high, thereby avoiding excessive manufacturing costs of the first current collector 100 and the second current collector 200 and reducing the manufacturing cost of the battery.

[0114] refer to Figure 5 , Figure 6 and Figure 7In some embodiments, the first disc body 150 is provided with a protruding rib 130 protruding towards the battery cell assembly 20, and the protruding rib 130 is used to abut against the battery cell assembly 20. The side of the protruding rib 130 facing away from the battery cell assembly 20 is connected to the battery cell assembly 20 by means of a penetration welding.

[0115] In this way, by means of the protruding rib 130 abutting against the battery cell assembly 20, and by means of the laser penetration welding of the battery cell assembly 20 from the region of the protruding rib 130 on the first disc body 150, the probability of a virtual weld occurring at the welding position between the first current collecting disc 100 and the battery cell assembly 20 can be reduced, and the welding stability and the overcurrent stability between the first current collecting disc 100 and the battery cell assembly 20 can be improved.

[0116] In some embodiments, the protruding rib 130 can be in the shape of a long strip, and the long strip-shaped protruding rib 130 can extend along the radial direction of the first current collecting disc 100. The longer the length of the protruding rib 130, the greater the welding area between the protruding rib 130 and the battery cell assembly 20.

[0117] Reference is made to Figure 5 , Figure 6 and Figure 7 In some embodiments, the protruding rib 130 is provided in a plurality, and the plurality of protruding ribs 130 are arranged in a spaced and uniform manner along the axial direction of the first disc body 150.

[0118] In this way, by means of the plurality of protruding ribs 130, the welding area between the first disc body 150 and the battery cell assembly 20 can be increased, and the uniformity of the contact between the first current collecting disc 100 and the battery cell assembly 20 can be increased, so that the welding area can be increased while the uniformity and stability of the welding, and the overcurrent capacity between the battery cell assembly 20 and the cover plate assembly 30 can be increased.

[0119] Reference is made to Figure 3 and Figure 8 In some embodiments, the second disc body 250 of the second current collecting disc 200 is provided with a positioning hole 220 in the region corresponding to the cover plate assembly 30, and the second current collecting disc 200 can be connected to the cover plate assembly 30 in a position connection manner through the positioning hole 220.

[0120] The surface of the outer lead-out piece 40 of the cover plate assembly 30 facing towards the battery cell assembly 20 is provided with a positioning protrusion 41, and the positioning protrusion 41 is arranged to penetrate into the positioning hole 220. The positioning hole 220 can be arranged at a position close to the middle part of the second current collecting disc 200.

[0121] In this way, by means of the positioning hole 220 arranged on the second current collecting disc 200, the position connection between the positioning protrusion 41 on the outer lead-out piece 40 and the positioning hole 220 can be realized, so that the assembly efficiency between the outer lead-out piece 40 and the second current collecting disc 200 can be improved.

[0122] The inner edge of the positioning hole 220 is connected with the outer sidewall of the positioning protrusion 41. The inner edge of the positioning hole 220 can abut against the outer sidewall of the positioning protrusion 41, or the inner edge of the positioning hole 220 can be connected with the outer edge of the positioning protrusion 41 by means of stitch welding.

[0123] In this way, by defining the positioning protrusion 41 within the positioning hole 220 and connecting the sidewall of the positioning hole 220 with the outer sidewall of the positioning protrusion 41, the connection stability between the outer lead-out piece 40 and the second current collector 200 can be improved, and the overcurrent capacity between the second current collector 200 and the cover plate assembly 30 can be improved.

[0124] Reference Figure 9 In some embodiments, the second current collector 200 further has a protruding portion 230 protruding towards the cover plate assembly 30, and the protruding portion 230 is used to abut against the surface of the cover plate assembly 30 facing the battery cell assembly 20.

[0125] In this way, by providing the protruding portion 230, in the case where the length of the outer lead-out piece 40 of the cover plate assembly 30 is short, or the spacing distance between the outer lead-out piece 40 and the second current collector 200 is large, the distance between the second current collector 200 and the outer lead-out piece 40 can be shortened by the protruding portion 230, and the protruding portion 230 can abut against the outer lead-out piece 40, thereby facilitating the welding of the second current collector 200 and the outer lead-out piece 40 in the region of the protruding portion 230.

[0126] Reference Figure 7 and Figure 9 In some embodiments, the first current collector 100 is provided with a first through hole 140, and the second current collector 200 is provided with a second through hole 240, and the first through hole 140 and the second through hole 240 are at least partially communicated in the thickness direction of the first current collector 100.

[0127] In this way, by providing the first through hole 140 on the first current collector 100 and the second through hole 240 on the second current collector 200, the electrolyte can enter the battery cell assembly 20 through the first through hole 140 and the second through hole 240. By making the first through hole 140 and the second through hole 240 at least partially communicated in the thickness direction of the first current collector 100, the battery cell assembly 20 can be kept in communication with the side of the second current collector 200 facing away from the battery cell assembly 20 through the overlapping part of the first through hole 140 and the second through hole 240, so as to ensure that the electrolyte can flow into the battery cell assembly 20 through the first through hole 140 and the second through hole 240 at any time.

[0128] In some embodiments, the first through hole 140 can be arranged on the first current collector plate 100 at any position except the first flange 110, and the first through hole 140 can have multiple. For example, when the first through hole 140 has one, the first through hole 140 can be arranged at the center of the first current collector plate 100, and when the first through hole 140 has multiple, the multiple first through holes 140 can be arranged at intervals and uniformly along the circumference of the first current collector plate 100.

[0129] If the first current collector plate 100 also has multiple ribs 130, the first through hole 140 and the first rib 130 can be arranged at intervals and alternately along the circumference of the first current collector plate 100.

[0130] Reference Figure 9 and Figure 10 In some embodiments, the second current collector plate 200 can also have one second through hole 240 or multiple second through holes 240. When the second current collector plate 200 has multiple second through holes 240, the multiple second through holes 240 can be arranged at intervals and uniformly along the circumference of the second current collector plate 200.

[0131] Reference Figure 1 The embodiments of the present application also provide a battery, which can be a single cell or a battery pack formed by connecting multiple cells in series or in parallel. In addition, the battery can be a square cell or a cylindrical cell, and the embodiments of the present application will be described by taking a cylindrical cell as an example.

[0132] As shown in Figure 1 The battery can include a cover plate assembly 30, a cell assembly 20, and the current collector plate device 10 described above, and the current collector plate device 10 is located between the cover plate assembly 30 and the cell assembly 20. The cell assembly 20 can include a cell 21 and an inner lead 22 electrically connected to the cell 21, and the inner lead 22 is electrically connected to the first current collector plate 100 in the current collector plate device 10. The cover plate assembly 30 can include a cover plate 31 and an outer lead 40 penetrating the cover plate 31, and the outer lead 40 is electrically connected to the second current collector plate 200 in the current collector plate device 10.

[0133] In this way, by using the current collector plate device 10 described above, the probability of liquid leakage inside the battery can be reduced, and the safety of the battery in use can be improved.

[0134] In some embodiments, the cover plate assembly 30 can include a cover plate 31 and an insulating piece 32, and the outer lead 40 penetrates the cover plate 31 and the insulating piece 32 in sequence and is welded to the second current collector plate 200. The insulating piece 32 is arranged on the side of the cover plate 31 facing the second current collector plate 200, and the insulating piece 32 abuts against the first current collector plate 100 and / or the second current collector plate 200 to insulate the first current collector plate 100 and / or the second current collector plate 200 from the cover plate 31.

[0135] In some embodiments, the battery can further include a housing 50 having an opening 51, the cell assembly 20 can be disposed in the housing 50, and the first current collector 100 and the second current collector 200 can also be disposed in the housing 50, and the cover plate assembly 30 is covered on the opening 51 of the housing 50.

[0136] The embodiments of the present application further provide a battery device, which includes the battery as above.

[0137] The embodiments of the present application further provide a power consuming device, which can include a power consuming device and the battery or the battery device as above, and the battery or the battery device can be used to provide electric energy for the power consuming device.

[0138] In this way, by using the battery as above to provide electric energy for the power consuming device, the use safety of the power consuming device can be improved.

[0139] In some embodiments, the battery in the power consuming device can be a single battery or a battery pack. If the battery in the power consuming device is a battery pack, the battery pack can include a plurality of single batteries.

[0140] The power consuming device provided by the embodiments of the present application can be a vehicle, such as an electric vehicle, a hybrid vehicle or a gas-fuel vehicle, can be an energy storage device, such as an energy storage power station, and can also be a household appliance or a smart terminal, etc.

[0141] The embodiments or implementations in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0142] It should be noted that the terms "in a specific implementation", "in some embodiments", "in the present embodiment", "exemplarily" and the like in the specification mean that the embodiments described can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or characteristic in combination with other embodiments described explicitly or implicitly.

[0143] Generally, the terms should be understood at least partly by the use in the context. For example, at least partly according to the context, the term "one or more" used in the specification can be used to describe any feature, structure or characteristic in the singular sense, or can be used to describe a combination of features, structures or characteristics in the plural sense. Similarly, at least partly according to the context, terms such as "a" or "said" can be understood to convey singular usage or convey plural usage.

[0144] It should be readily understood that "on," "over," and "above" in the present disclosure should be interpreted in the broadest context, such that "on" means not only "directly on" but also includes the meaning of "on" with intervening features or layers therebetween, and "over" or "above" includes not only the meaning of "over" or "above" but also the meaning of "over" or "above" with no intervening features or layers therebetween (i.e., directly on).

[0145] In addition, spatially relative terms, such as "beneath", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0146] Finally, it should be noted that the above-described embodiments are merely intended for describing and illustrating, but not limiting, the technical solutions of the present application; even though the present application has been described in detail with reference to the above-described embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above-described embodiments, or make equivalent replacement for some or all of the technical features therein; and such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A current collector plate arrangement (10) characterized by The utility model relates to a battery cell module, comprising: a first current collecting plate (100) for electrically connecting with a battery cell assembly (20); a second current collecting plate (200) electrically connected with the first current collecting plate (100) and for electrically connecting with a cover plate assembly (30); the first current collecting plate (100) comprises a first flange (110), and the second current collecting plate (200) comprises a second flange (210); the first flange (110) and the second flange (210) are adapted to be electrically connected.

2. The current plate arrangement (10) according to claim 1, characterized in that the first current collecting plate (100) further comprises a first disc body (150), and the first flange (110) is arranged at the periphery of the first disc body (150) and is connected with the first disc body (150) at an angle; the second current collecting plate (200) further comprises a second disc body (250), and the second flange (210) is arranged at the periphery of the second disc body (250) and is connected with the second disc body (250) at an angle, and the first flange (110) is adapted to be in contact with the second flange (210) and is connected by welding.

3. The current plate arrangement (10) according to claim 2, characterized in that the thickness of the first flange (110) is less than the thickness of the second flange (210); and / or, the thickness of the first disc body (150) is less than or equal to the thickness of the second disc body (250).

4. The current plate arrangement (10) according to claim 1, characterized in that the first flange (110) surrounds the outside of the second flange (210), and the outer surface of the first flange (110) has a welding groove (120), the groove opening of the welding groove (120) faces the outside of the first flange (110), the groove bottom of the welding groove (120) abuts against the surface of the second flange (210), and the groove bottom of the welding groove (120) is welded with the second flange (210).

5. The current plate arrangement (10) according to claim 4, characterized in that the first flange (110) and the second flange (210) are both annular, the welding groove (120) is an annular groove, and the annular groove is arranged on the outer circumferential side of the first flange (110).

6. The current plate arrangement (10) according to claim 1, characterized in that a plurality of notches (111) are arranged on the first flange (110), the plurality of notches (111) are arranged at intervals along the circumference of the first flange (110), and the notches (111) extend along the height direction of the first flange (110).

7. The current plate arrangement (10) according to claim 2, characterized in that the first current collecting plate (100) and the second current collecting plate (200) are arranged in layers, and in the layering direction of the first current collecting plate (100) and the second current collecting plate (200), the end of the second flange (210) away from the second disc body (250) is flush with the end of the first flange (110) away from the first disc body (150); and / or, in the thickness direction of the second disc body (250), the height of the second flange (210) is greater than or equal to 1 mm and less than or equal to 3 mm.

8. The current plate arrangement (10) according to claim 2, characterized in that a protruding rib (130) is arranged on the first disc body (150), and the protruding rib (130) is used for electrically connecting with the battery cell assembly (20).

9. The current plate arrangement (10) according to claim 8, characterized in that The convex ribs (130) are multiple, and the multiple convex ribs (130) are spaced and uniformly arranged along the circumferential direction of the first disc body (150).

10. The current plate arrangement (10) according to claim 2, characterized in that The second disc body (250) is provided with a positioning hole (220), and the positioning hole (220) is used for positioning and connecting with the cover plate assembly (30).

11. The current plate arrangement (10) according to any of claims 1 to 10, characterized in that The second current collecting disc (200) is further provided with a protruding portion (230), and the protruding portion (230) is used for abutting with the cover plate assembly (30).

12. The current plate arrangement (10) according to any one of claims 1 to 10, characterized in that The first current collecting disc (100) is provided with a first through hole (140), and the second current collecting disc (200) is provided with a second through hole (240), and the first through hole (140) and the second through hole (240) are at least partially communicated in the thickness direction of the first current collecting disc (100).

13. A battery, characterized by The battery device comprises a cover plate assembly (30), an electric core assembly (20), and the current collecting disc device (10) of any one of claims 1 to 12, and the current collecting disc device (10) is located between the cover plate assembly (30) and the electric core assembly (20).

14. The battery of claim 13, wherein, The electric core assembly (20) comprises an electric core (21) and an inner lead-out piece (22) electrically connected with the electric core (21), and the inner lead-out piece (22) is electrically connected with the first current collecting disc (100) in the current collecting disc device (10). The cover plate assembly (30) comprises a cover plate (31) and an outer lead-out piece (40) penetrating through the cover plate (31), and the outer lead-out piece (40) is electrically connected with the second current collecting disc (200) in the current collecting disc device (10).

15. The battery of claim 14, wherein, The second current collecting disc (200) is connected with the outer lead-out piece (40) through a penetrating welding.

16. A battery device characterized by comprising: The battery as claimed in any one of claims 13 to 15.

17. An electrical device, characterized by The battery device as claimed in any one of claims 13 to 15 or the battery as claimed in claim 16 is used for providing electric energy for the electric device.

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