Battery cover plate assembly, battery, battery pack, and electric device

Abstract

An electric device, comprising a battery pack. The battery pack comprises a battery, the battery comprises a battery cover plate assembly, and the battery cover plate assembly comprises current collectors, flow guide members, and poles. The flow guide members are connected to the current collectors; the flow guide members extend in a first direction, the current collectors extend in a second direction, and the first direction and the second direction are arranged at an angle; and each pole is provided with a connecting hole, and the end of each flow guide member away from the corresponding current collector extends into the corresponding connecting hole and is connected to the corresponding pole.

Description

Battery cover plate assembly, battery, battery pack and electric equipment

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202411084754.X, filed on August 8, 2024, and entitled "Battery cover plate assembly, battery, battery pack and electric equipment", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, in particular, to a battery cover plate assembly, a battery, a battery pack and an electric equipment. BACKGROUND

[0004] In the related art, the battery adopts a method of directly welding the lead-out sheet of the current collector plate with the pole, and then closing the cover by bending the lead-out sheet of the current collector plate. The size of the lead-out sheet of the current collector plate cannot be too large, otherwise it will affect the bending of the lead-out sheet of the current collector plate, resulting in increased process difficulty. However, the small size of the lead-out sheet of the current collector plate cannot achieve large current flow. SUMMARY

[0005] The purpose of the present disclosure is to provide a battery cover plate assembly, a battery, a battery pack and an electric equipment to solve the above-mentioned problems in the related art.

[0006] In order to achieve the above-mentioned purpose, one aspect of the present disclosure provides a battery cover plate assembly, comprising:

[0007] a current collecting member;

[0008] a current conducting member; and

[0009] a pole;

[0010] wherein the current conducting member is connected to the current collecting member, the current conducting member extends along a first direction, the current collecting member extends along a second direction, the first direction is arranged at an angle with the second direction, the pole is provided with a connecting hole, and an end of the current conducting member away from the current collecting member extends into the connecting hole and is connected with the pole.

[0011] Optionally, the pole is provided with an accommodation space in communication with the connecting hole, and the end of the current conducting member away from the current collecting member extends into the accommodation space through the connecting hole and is connected to and fitted with the inner wall of the accommodation space.

[0012] Optionally, the accommodation space is configured as a mounting groove formed on the pole, the pole is provided with the connecting portion, the connecting portion is connected to the mounting groove, and the connecting portion is connected with the end of the current conducting member extending into the mounting groove.

[0013] Optionally, the connecting part is configured as a pressing block, and the pressing block abuts against one end of the flow guide member extending into the mounting groove, so that the one end of the flow guide member away from the current collector abuts against the groove wall of the mounting groove.

[0014] Optionally, the mounting groove is located at the end of the pole away from the current collector, and the groove bottom of the mounting groove is communicated with the connecting hole.

[0015] Optionally, the groove wall of the mounting groove is provided with a first guide inclined surface, the side of the pressing block away from the flow guide member is provided with a second guide inclined surface, the first guide inclined surface and the second guide inclined surface abut against each other, and the first guide inclined surface and the second guide inclined surface cooperate to enable the pressing block to push the one end of the flow guide member away from the current collector to the groove wall of the mounting groove and abut against the groove wall.

[0016] Optionally, the pressing block is welded with the one end of the flow guide member away from the current collector and the pole; or

[0017] the pressing block is bolted with the pole.

[0018] Optionally, the battery cover plate assembly further comprises a pole end cover connected to the pole, the pole end cover is used for covering the pressing block, and a gap is left between the pressing block and the pole end cover in the first direction, and the gap is greater than 0.3 mm.

[0019] The first direction is set as the axial direction of the battery cover plate assembly.

[0020] Optionally, the pole is provided with a bearing step, and the pole end cover is welded to the bearing step.

[0021] Optionally, the accommodating space is configured as an accommodating groove opened on the surface of the pole, the one end of the flow guide member away from the current collector extends into the accommodating groove, and is connected to and abuts against the groove wall or groove bottom of the accommodating groove.

[0022] Optionally, the accommodating groove is located at the end of the pole away from the current collector, the groove bottom of the accommodating groove is communicated with the connecting hole, and the one end of the flow guide member away from the current collector extends into the accommodating groove and is welded to the groove bottom of the accommodating groove by being bent.

[0023] Optionally, the battery cover plate assembly further comprises a pole end cover connected to the end of the pole away from the current collector, the pole end cover can cover the accommodating groove, a welding gap is left between the flow guide member and the groove wall of the accommodating groove in the second direction, the welding gap is greater than 0.2 mm, and the groove depth of the accommodating groove is greater than 0.3 mm in the first direction.

[0024] The first direction is set as an axial direction of the battery cover plate assembly, and the second direction is set as a radial direction of the battery cover plate assembly.

[0025] Optionally, the battery cover plate assembly further comprises a closed cover, the pole post is connected to the closed cover, and the current collecting piece is arranged opposite to the closed cover.

[0026] Optionally, the closed cover is provided with a liquid injection hole and / or an explosion-proof valve.

[0027] Optionally, the liquid injection hole and / or the explosion-proof valve are arranged at the center of the closed cover.

[0028] Optionally, in the second direction, an assembly gap is left between the hole wall of the connecting hole and the flow guide piece, and the width of the assembly gap is 0.9mm-2.2mm.

[0029] The first direction is set as an axial direction of the battery cover plate assembly, and the second direction is set as a radial direction of the battery cover plate assembly.

[0030] Optionally, the connecting hole comprises a first hole section and a second hole section connected to each other, the first hole section is close to the current collecting piece, the hole diameter of the first hole section is larger than the hole diameter of the second hole section, and the hole diameter of the first hole section gradually decreases in the direction away from the current collecting piece to guide the flow guide piece.

[0031] Optionally, the current collecting piece is provided with a liquid passing hole penetrating through the current collecting piece in the first direction.

[0032] Optionally, the current collecting piece is configured as a disc structure, and the flow guide piece is configured as a sheet structure, in the first direction, the thickness of the current collecting piece is 0.1mm-0.5mm, and in the second direction, the width of the flow guide piece is 5mm-20mm.

[0033] The first direction is set as an axial direction of the battery cover plate assembly, and the second direction is set as a radial direction of the battery cover plate assembly.

[0034] The second aspect of the present disclosure further provides a battery comprising a shell and the above-mentioned battery cover plate assembly, and the battery cover plate assembly is connected to the shell.

[0035] Optionally, the battery is configured as a cylindrical battery, the number of the battery cover plate assemblies is two and the two battery cover plate assemblies are connected to two ends of the shell respectively, the pole posts of the two battery cover plate assemblies comprise a positive pole post and a negative pole post, the positive pole post and the negative pole post are located at the two ends of the shell respectively, and the number of the current collecting pieces is two, and the two current collecting pieces correspond to the positive pole post and the negative pole post respectively.

[0036] Optionally, the number of the positive electrode posts and the negative electrode posts is two, the two positive electrode posts are located at one end of the shell, the two negative electrode posts are located at the other end of the shell, and the number of the current collectors on each of the current collectors is two.

[0037] Optionally, the battery further comprises a winding core, the shell is configured as a cylinder with two open ends, the winding core is connected in the cylinder, two battery cover plate assemblies are connected to the two ends of the cylinder respectively and close the two ends of the cylinder, two current collectors are connected to the two ends of the winding core respectively, and the current collectors are located on the side of the current collectors away from the winding core.

[0038] The third aspect of the present disclosure further provides a battery pack comprising the battery described above.

[0039] The fourth aspect of the present disclosure further provides a power consumption device comprising the battery cover plate assembly described above, or the battery described above, or the battery pack described above.

[0040] The technical solution described above, by setting the current collectors at an angle with the current collectors, the current collectors can be conveniently connected with the electrode posts without the need to separately set the lead-out pieces. By setting the connecting holes on the electrode posts, the current collectors are inserted into the connecting holes, so that after the current collectors are connected with the connecting holes, the position of the current collectors close to the current collectors does not need to be bent, and the electrode posts and the current collectors can be brought together to realize the cover closing operation. Thus, the size of the current collectors can be set according to the large rate charge and discharge performance to be achieved, without the need to consider whether the bending process requirement needs to be met, so that the cylindrical battery formed satisfies the large rate charge and discharge performance requirement. In addition, after the current collectors are not bent too much, the space between the electrode posts and the current collectors is small, and the energy density of the battery formed can also be improved.

[0041] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments section. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and together with the following specific embodiments, serve to explain the present disclosure but do not constitute a limitation thereof. In the drawings:

[0043] Fig. 1 is a structural schematic diagram of a large rate cylindrical battery according to a first embodiment of the present disclosure.

[0044] Fig. 2 is a partial structural schematic diagram of Fig. 1 according to the first embodiment of the present disclosure.

[0045] Fig. 3 is a structural schematic diagram of a large rate cylindrical battery according to a second embodiment of the present disclosure.

[0046] Fig. 4 is a schematic view of a partial structure of Fig. 3 according to a second embodiment of the present disclosure.

[0047] Fig. 5 is a schematic view of a structure of a large power cylindrical battery according to a third embodiment of the present disclosure.

[0048] Fig. 6 is a schematic view of a partial structure of Fig. 5 according to the third embodiment of the present disclosure.

[0049] Fig. 7 is a schematic view of a current collector according to an embodiment of the present disclosure.

[0050] Fig. 8 is a schematic view of one end of a large power cylindrical battery according to an embodiment of the present disclosure.

[0051] Fig. 9 is a schematic view of the other end of the large power cylindrical battery according to an embodiment of the present disclosure.

[0052] Fig. 10 is a schematic view of a battery pack according to an embodiment of the present disclosure.

[0053] Fig. 11 is a schematic view of an electrical device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0054] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0055] In the present disclosure, unless otherwise specified, the orientation words such as "upper", "lower", "inner", and "outer" are defined as the direction of the drawing surface, and the direction of the relevant parts. In addition, the terms "first", "second", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present disclosure, it should also be noted that, unless otherwise specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0057] Cylindrical batteries have the advantages of high capacity and good consistency, and with the development of battery technology, cylindrical batteries are used more and more widely.

[0058] In related technologies, cylindrical batteries use a method where the current collector leads are directly welded to the terminals, and then the batteries are sealed by bending the current collector leads. This method requires a large space between the current collector and the terminals. At the same time, the size of the current collector leads cannot be too large, otherwise it will affect the bending of the current collector leads, leading to increased manufacturing difficulty. Small-sized current collector leads cannot achieve high-rate overcurrent, otherwise the temperature of the current collector leads will be too high, failing to meet the requirements of high-rate charge and discharge performance. This is because the overcurrent is affected by the cross-sectional area of ​​the current collector leads.

[0059] Therefore, as shown in Figures 1-9, one aspect of this disclosure provides a battery cover assembly 100, including a current collector 1, a current guide 2, and a terminal post 3.

[0060] The flow guide 2 is connected to the current collector 1. The flow guide 2 extends along the first direction, and the current collector 1 extends along the second direction. The first direction and the second direction are set at an angle. A connection hole 31 is provided on the pole post 3. The end of the flow guide 2 away from the current collector 1 extends into the connection hole 31 and is connected to the pole post 3.

[0061] The current collector 1 is arranged opposite to the pole post 3, the current guide 2 is located on the side of the current collector 1 facing the pole post 3, and the connection hole 31 also extends along the first direction, so the current guide 2 can be directly inserted into the connection hole 31.

[0062] In the above technical solution, the current guide 2 is angled to the current collector 1, allowing for easy connection between the current guide 2 and the terminal post 3 without the need for a separate lead-out piece. The current guide 2 extends into the connection hole 31 on the terminal post 3, eliminating the need for bending the current guide 2 near the current collector 1 after connection. This allows the terminal post 3 and current collector 1 to come together for a closing operation. Therefore, the size of the current guide 2 can be set according to the desired high-rate charge / discharge performance without considering bending process requirements, ensuring the assembled battery meets high-rate charge / discharge performance requirements. Furthermore, the reduced bending of the current guide 2 minimizes the space occupied between the terminal post 3 and current collector 1, thus increasing the energy density of the assembled battery.

[0063] Optionally, in one embodiment of this disclosure, the first direction and the second direction may be perpendicular. The first direction is defined as the axial direction of the battery cover assembly 100, and the second direction is defined as the radial direction of the battery cover assembly 100.

[0064] Optionally, in one embodiment of the present disclosure, the pole 3 is provided with a containing space 7 in communication with the connecting hole 31, and the flow guide 2 extends into the containing space 7 through the connecting hole 31 and is connected to and adheres to the inner wall of the containing space 7. The containing space 7 can facilitate the connection of the flow guide 2 and the pole 3, so that the flow guide 2 is firmly fixed to the pole 3 and is prevented from falling off.

[0065] Optionally, in one embodiment of the present disclosure, the containing space 7 is configured as a mounting groove 33 formed on the pole 3, and the pole 3 is provided with a connecting portion 32 connected to the mounting groove 33, and the connecting portion 32 is connected to the end of the flow guide 2 extending into the mounting groove 33. The mounting groove 33 can be a groove formed on the surface of the pole 3, and the mounting groove 33 is in communication with the connecting hole 31, so that the end of the flow guide 2 extending away from the current collector 1 extends into the mounting groove 33 through the connecting hole 31 and is connected and fixed to the connecting portion 32. In this way, the manufacturing process can be facilitated, and the grooving operation can be directly performed.

[0066] Optionally, in another embodiment of the present disclosure, the containing space 7 can be configured as a cavity formed in the pole 3, and the flow guide 2 is connected to the inner wall of the cavity after extending into the cavity.

[0067] Optionally, in one embodiment of the present disclosure, the connecting portion 32 is configured as an extrusion block 321, which abuts against the end of the flow guide 2 extending into the mounting groove 33, so that the end of the flow guide 2 extending away from the current collector 1 is tightly adhered to the groove wall of the mounting groove 33. The extrusion block 321 can facilitate the connection operation and improve the connection area and strength of the flow guide 2 and the pole 3.

[0068] The extrusion block 321 is connected to the pole 3, so that the extrusion block 321 can extrude and fix the end of the flow guide 2 extending away from the current collector 1, so that the flow guide 2 is firmly fixed to the pole 3 and adheres to the pole 3. It can be understood that after the end of the flow guide 2 extending away from the current collector 1 extends into the connecting hole 31, the end of the flow guide 2 extending away from the current collector 1 can be extruded and fixed by the extrusion block 321.

[0069] Optionally, in one embodiment of the present disclosure, the mounting groove 33 is located at the end of the pole 3 away from the current collector 1, the groove bottom of the mounting groove 33 is in communication with the connecting hole 31, and one side of the extrusion block 321 abuts against the end of the flow guide 2 extending away from the current collector 1, so that the end of the flow guide 2 extending away from the current collector 1 is tightly adhered to the groove wall of the mounting groove 33.

[0070] In some examples, the connecting hole 31 can be a through hole, and the extrusion block 321 can be located at the end of the pole 3 away from the current collector 1, and the end of the flow guide 2 away from the current collector 1 can pass through the connecting hole 31 and be matched with the extrusion block 321. In other examples, the extrusion block 321 can be located at the side of the pole 3, and the extrusion block 321 can also be inserted into the connecting hole 31, and the end of the flow guide 2 away from the current collector 1 can be extruded and fitted on the hole wall of the connecting hole 31 by the extrusion block 321.

[0071] The end of the flow guide 2 away from the current collector 1 can extend into the mounting groove 33 after passing through the connecting hole 31 and can be located at the side of the groove wall of the mounting groove 33, and the extrusion block 321 is arranged in the mounting groove 33. The extrusion block 321 can extrude and push the end of the flow guide 2 away from the current collector 1, so that the end of the flow guide 2 away from the current collector 1 is tightly fitted with the groove wall of the mounting groove 33, and the connection strength with the pole 3 is maintained. It can be understood that the end of the flow guide 2 away from the current collector 1 is clamped between the extrusion block 321 and the groove wall of the mounting groove 33.

[0072] The mounting groove 33 is located at the end of the pole 3 away from the current collector 1, that is, the slot of the mounting groove 33 is directed away from the current collector 1, so that the extrusion block 321 can be easily installed after the flow guide 2 extends into the connecting hole 31, and the flow guide 2 and the pole 3 can be connected and fixed during the cover closing operation of the battery, which is very convenient and simplifies the process.

[0073] Optionally, in another embodiment of the present disclosure, the mounting groove 33 can be located at the end of the pole 3 towards the current collector 1, and the groove wall of the mounting groove 33 is in communication with the connecting hole 31.

[0074] Optionally, in an embodiment of the present disclosure, the groove wall of the mounting groove 33 is provided with a first guide inclined surface 34, and the side of the extrusion block 321 away from the flow guide 2 is provided with a second guide inclined surface 35, the first guide inclined surface 34 and the second guide inclined surface 35 are fitted, and the first guide inclined surface 34 and the second guide inclined surface 35 are fitted to extrude and push the end of the flow guide 2 away from the current collector 1 to the groove wall of the mounting groove 33 and tightly fit. By such arrangement, when the extrusion block 321 is gradually installed into the mounting groove 33, the extrusion block 321 can be moved towards the end of the flow guide 2 away from the current collector 1 by the fitting of the first guide inclined surface 34 and the second guide inclined surface 35, so as to tightly fit the end of the flow guide 2 away from the current collector 1 to the groove wall of the mounting groove 33, and generate an extrusion and fixing effect.

[0075] It can be understood that the mounting groove 33 has a set of oppositely arranged groove walls, and the end of the flow guide 2 away from the current collector 1 passes through the connecting hole 31 and is located at the side of the groove wall of one of the mounting grooves 33, and the first guide slope 34 is located at the groove wall of the other mounting groove 33. Correspondingly, the second guide slope 35 of the extrusion block 321 is a single-sided slope. In some examples, the extrusion block 321 is a cube or a cuboid, one side of which is provided with the second guide slope 35, and the other three sides are provided with straight faces. Among them, in the second direction, the gap between the straight face of the extrusion block 321 and the groove wall of the mounting groove 33 can be 0.02mm-0.3mm, facilitating the installation of the extrusion block 321 into the mounting groove 33.

[0076] Optionally, in an embodiment of the present disclosure, the extrusion block 321 is welded with the end of the flow guide 2 away from the current collector 1 and the pole 3. By so arranging, the connection strength of the extrusion block 321 with the flow guide 2 and the pole 3 can be improved.

[0077] In some examples, the extrusion block 321 and the end of the flow guide 2 away from the current collector 1 are welded at the position where they are in close contact with each other, which can be close to the position of the slot of the mounting groove 33, facilitating the welding operation. The extrusion block 321 can be welded with the position where the groove wall of the mounting groove 33 and the end of the flow guide 2 away from the current collector 1 are in close contact, that is, one welding makes the extrusion block 321, the end of the flow guide 2 away from the current collector 1 and the pole 3 connected together at the same time, simplifying the process. In other examples, the extrusion block 321 and the end of the flow guide 2 away from the current collector 1 are welded at the position where they are in close contact with each other, and the extrusion block 321 can be welded with other groove walls of the mounting groove 33.

[0078] Optionally, in an embodiment of the present disclosure, the extrusion block 321 is bolted with the pole 3. Among them, the extrusion block 321 is in close contact with the end of the flow guide 2 away from the current collector 1, and a through hole can be provided on the extrusion block 321, and a threaded hole can be provided on the pole 3, and the fixing is realized by screwing the bolt through the through hole and the threaded hole. In some examples, the threaded hole is arranged at the groove bottom of the mounting groove 33, and the through hole penetrates the extrusion block 321 along the first direction.

[0079] Optionally, in another embodiment of the present disclosure, the connecting part 32 can be a clamping part, and the end of the flow guide 2 extending into the mounting groove 33 can be clamped and fixed by the clamping part.

[0080] Optionally, in an embodiment of the present disclosure, the battery cover plate assembly 100 further comprises a pole end cover 4 connected to the end of the pole 3 away from the current collector 1, and the pole end cover 4 is used to cover the extrusion block 321. In the first direction, a gap is left between the extrusion block 321 and the pole end cover 4, and the gap is greater than 0.3mm. By arranging the pole end cover 4, the extrusion block 321 and the flow guide 2 can be covered to avoid being exposed.

[0081] In some examples, the pole post end cover 4 closes the mounting groove 33, and the gap provided prevents the welding flash or the bolt from contacting the pole post end cover 4 when the pressing block 321 is connected to the flow guide 2 and the pole post 3.

[0082] In an embodiment of the present disclosure, the pole post 3 is provided with a bearing step at the end away from the current collector 1, and the pole post end cover 4 is welded to the bearing step. The pole post end cover 4 is placed in the bearing step, and the pole post end cover 4 plays a sealing role to prevent liquid leakage.

[0083] In another embodiment of the present disclosure, the accommodation space 7 is configured as an accommodation groove 322 provided on the surface of the pole post 3, and the end of the flow guide 2 away from the current collector 1 extends into the accommodation groove 322 and is connected and attached to the groove wall or groove bottom of the accommodation groove 322. The end of the flow guide 2 away from the current collector 1 is directly connected in the accommodation groove 322 to achieve connection and fixation with the pole post 3. In some examples, the end of the flow guide 2 away from the current collector 1 can be welded and fixed to the groove bottom of the accommodation groove 322. It can be understood that after the end of the flow guide 2 away from the current collector 1 extends into the connecting hole 31, it can continue to extend into the accommodation groove 322 to achieve connection.

[0084] In an embodiment of the present disclosure, the accommodation groove 322 is located at the end of the pole post 3 away from the current collector 1, the groove bottom of the accommodation groove 322 is in communication with the connecting hole 31, and the end of the flow guide 2 away from the current collector 1 extends into the accommodation groove 322 and is bent and welded to the groove bottom of the accommodation groove 322. In this way, the end of the flow guide 2 away from the current collector 1 can be bent and attached to the groove bottom of the accommodation groove 322, improving the connection strength, and the quality of the welding can be easily observed, the process capability is better, and the problems of uncontrollable penetration welding quality or flow restriction caused by the out-of-joint cover structure due to the bending of the current collector plate are completely avoided. In some examples, one end of the groove bottom of the accommodation groove 322 is in communication with the connecting hole 31, so that the flow guide 2 passing through the connecting hole 31 can be directly bent and attached to the groove bottom of the accommodation groove 322, which has sufficient bending space. In some examples, after the end of the flow guide 2 away from the current collector 1 passes through the connecting hole 31, it can be bent by press bending and welded and flattened by a special clamp.

[0085] Optionally, in an embodiment of the present disclosure, the battery cover plate assembly 100 further comprises a pole end cover 4 connected to one end of the pole 3 away from the current collector 1, the pole end cover 4 can cover the accommodating groove 322, in the second direction, the flow guide 2 and the groove wall of the accommodating groove 322 leave a welding gap 8, the welding gap 8 is greater than 0.2mm, in the first direction, the groove depth of the accommodating groove 322 is greater than 0.3mm. By so arranging, the welding operation of the flow guide 2 and the groove wall of the accommodating groove 322 can be facilitated, while avoiding contact interference between the flow guide 2 and the pole end cover 4, and contact interference between the welding scar of the flow guide 2 and the groove wall of the accommodating groove 322 and the pole end cover 4. The pole end cover 4 can produce a sealing effect to prevent liquid leakage.

[0086] Optionally, in an embodiment of the present disclosure, the pole 3 comprises an upper pole 39 and a lower pole 38, the upper pole 39 and the lower pole 38 are oppositely arranged in the first direction, the pole end cover 4 is connected to the upper pole 39, and the connecting hole 31 is arranged on the lower pole 38. In some examples, a bearing step is arranged on one end of the upper pole 39 away from the lower pole 38. The upper pole 39 and the lower pole 38 can be fixed by welding.

[0087] Optionally, an insulating ring 36 and a sealing ring 37 can also be arranged on the side wall of the lower pole 38, the insulating ring 36 and the sealing ring 37 are sleeved on the lower pole 38, which can be connected to the shell 5 to produce a sealing effect and ensure that the pressure does not leak.

[0088] Optionally, in an embodiment of the present disclosure, the battery cover plate assembly 100 further comprises a closing cover 52, the pole 3 is connected to the closing cover 52, and the current collector 1 is oppositely arranged with the closing cover 52. The closing cover 52 can realize the closing of the shell of the battery and realize the closing operation. In some examples, the closing cover 52 is provided with a mounting hole, and the insulating ring 36 and the sealing ring 37 are connected to the mounting hole.

[0089] Optionally, in an embodiment of the present disclosure, the closing cover 52 is provided with a liquid injection hole 53 and / or an explosion-proof valve 54. The liquid injection hole 53 can be used for liquid injection, and the explosion-proof valve 54 can be used for pressure relief to avoid explosion due to excessive pressure. In some examples, the liquid injection hole 53 or the explosion-proof valve 54 can be arranged on one closing cover 52, or the liquid injection hole 53 and the explosion-proof valve 54 can be arranged on one closing cover 52.

[0090] Optionally, in an embodiment of the present disclosure, when the liquid injection hole 53 and the explosion-proof valve 54 are arranged on one closing cover 52, the liquid injection hole 53 and the explosion-proof valve 54 can be close to the center position of the closing cover 52.

[0091] Optionally, in another embodiment of the present disclosure, when the plurality of sealing covers 52 are respectively provided with the liquid injection hole 53 and the explosion-proof valve 54, the liquid injection hole 53 and the explosion-proof valve 54 are respectively arranged at the center of the corresponding sealing cover 52. By arranging the explosion-proof valve 54 at the center, the safety is higher than that of the explosion-proof valve 54 arranged at the side, which is beneficial to the gas discharge when the battery is on fire due to internal short circuit. Meanwhile, the liquid injection hole 53 arranged at the center simplifies the positioning difficulty of the battery liquid injection, and the process stability is more optimal.

[0092] Optionally, in an embodiment of the present disclosure, in the second direction, an assembly gap 9 is left between the hole wall of the connecting hole 31 and the flow guide 2, and the width of the assembly gap 9 is 0.9mm-2.2mm. By arranging the assembly gap 9, the connection and assembly of the flow guide 2 and the connecting hole 31 are facilitated, and the assembly efficiency is improved. In some examples, the assembly gap 9 is the spacing space between the side of the flow guide 2 and the hole wall of the connecting hole 31. The flow guide 2 can be a sheet structure, and in the second direction, the assembly gap 9 reserved in the thickness direction of the flow guide 2 can be 0.9mm-1.1mm, and in the width direction of the flow guide 2, the assembly gap 9 reserved can be 1.8mm-2.2mm.

[0093] Optionally, in an embodiment of the present disclosure, the connecting hole 31 includes a first hole section 311 and a second hole section 312 connected to each other, the first hole section 311 is close to the current collector 1, the hole diameter of the first hole section 311 is larger than that of the second hole section 312, and the hole diameter of the first hole section 311 gradually decreases in the direction away from the current collector 1 to guide the flow guide 2. By arranging the connecting hole 31 in this way, the flow guide 2 can be inserted into the connecting hole 31 from the end away from the current collector 1, and the assembly efficiency is improved.

[0094] Optionally, in an embodiment of the present disclosure, the current collector 1 is provided with a liquid passing hole 11 penetrating the current collector 1 in the first direction. By arranging the liquid passing hole 11 in this way, the liquid injection can be facilitated. In some examples, the number of liquid passing holes 11 can be multiple, and one liquid passing hole 11 can correspond to the liquid injection hole 53.

[0095] Optionally, in an embodiment of the present disclosure, the current collector 1 is configured as a disc structure, and the flow guide 2 is configured as a sheet structure. In the first direction, the thickness of the current collector 1 is 0.1mm-0.5mm, and in the second direction, the width of the flow guide 2 is 5mm-20mm. By arranging the current collector 1 and the flow guide 2 in this way, large flow rate can be achieved. The current collector 1 is designed as a concave welding plane, which can be formed by direct stamping or thinning treatment.

[0096] As shown in FIG. 1, FIG. 3 and FIG. 5, the second aspect of the present disclosure further provides a battery 200, which comprises a shell 5 and the above-mentioned battery cover plate assembly 100, and the battery cover plate assembly 100 is connected to the shell 5.

[0097] Optionally, in an embodiment of the present disclosure, the battery 200 is configured as a cylindrical battery, the number of the battery cover plate assemblies 100 is two, and the two battery cover plate assemblies 100 are connected to the two ends of the shell 5 respectively, the poles 3 of the two battery cover plate assemblies 100 include positive poles and negative poles, the positive poles and the negative poles are connected to the two ends of the shell 5 respectively, and the number of the current collectors 1 is two, and the two current collectors 1 correspond to the positive poles and the negative poles respectively. Among them, the current collectors 1 are located in the shell 5 and at the two ends of the shell 5, and respectively face the positive poles and the negative poles.

[0098] Optionally, in an embodiment of the present disclosure, the number of the positive poles and the negative poles is two, the two positive poles are located at one end of the shell 5, the two negative poles are located at the other end of the shell 5, and the number of the flow guides 2 on each current collector 1 is two. By such a design, the bipolar pole 3 can realize large current flow and large current charge and discharge of the cylindrical battery. Thus, the battery 200 forms a large current cylindrical battery, which can realize large current charge and discharge.

[0099] Optionally, in another embodiment of the present disclosure, the number of the positive poles and the negative poles can be more, that is, more than two, which can be set according to actual current flow requirements.

[0100] Optionally, in an embodiment of the present disclosure, the battery 200 further includes a winding core 6, the shell 5 is configured as a cylinder 51 with two open ends, the winding core 6 is connected in the cylinder 51, the two battery cover plate assemblies 100 are connected to the two ends of the cylinder 51 respectively and seal the two ends of the cylinder 51, the two current collectors 1 are connected to the two ends of the winding core 6 respectively, and the flow guides 2 are located on the side of the current collectors 1 away from the winding core 6. The sealing cover 52 can seal the cylinder 51, and the cylinder 51 is used to accommodate the winding core 6.

[0101] Optionally, in an embodiment of the present disclosure, the battery 200 can be configured as a rectangular battery, which can be a square battery or a long strip battery, and the number of the battery cover plate assemblies 100 can be one, which is connected to one end of the shell 5. Among them, the shell 5 is configured as a rectangular shell with one open end, the winding core is connected in the shell 5, one battery cover plate assembly 100 is connected to the open end of the shell 5 and is sealed, the current collector 1 is connected to the winding core, and the flow guide 2 is located on the side of the current collector 1 away from the winding core.

[0102] As shown in FIG. 10, the third aspect of the present disclosure further provides a battery pack 300, which includes the above-mentioned battery 200.

[0103] The fourth aspect of the present disclosure further provides a power consumption device 400, which includes the above-mentioned battery cover plate assembly 100, or the above-mentioned battery 200, or the above-mentioned battery pack 300 (as shown in FIG. 11). Among them, the power consumption device 400 can include a vehicle.

[0104] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0105] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0106] In addition, various different embodiments of the present disclosure can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed in the present disclosure.

Claims

1. A battery cover plate assembly (100), characterized by, The battery cover plate assembly (100) comprises: a current collecting piece (1); a current conducting piece (2); and a pole (3); wherein the current conducting piece (2) is connected to the current collecting piece (1), the current conducting piece (2) extends in a first direction, the current collecting piece (1) extends in a second direction, the first direction is arranged at an angle with the second direction, the pole (3) is provided with a connecting hole (31), and an end of the current conducting piece (2) away from the current collecting piece (1) extends into the connecting hole (31) and is connected to the pole (3).

2. The battery cover plate assembly (100) of claim 1, wherein, The pole (3) is provided with a containing space (7) in communication with the connecting hole (31), and the end of the current conducting piece (2) away from the current collecting piece (1) extends into the containing space (7) through the connecting hole (31), and is connected to and abuts against the inner wall of the containing space (7).

3. The battery cover plate assembly (100) of claim 2, wherein, The containing space (7) is configured as a mounting groove (33) formed on the pole (3), the pole (3) is provided with a connecting portion (32), the connecting portion (32) is connected to the mounting groove (33), and the connecting portion (32) is connected to the end of the current conducting piece (2) extending into the mounting groove (33).

4. The battery cover plate assembly (100) of claim 3, wherein, The connecting portion (32) is configured as an extrusion block (321), the extrusion block (321) abuts against the end of the current conducting piece (2) extending into the mounting groove (33), so that the end of the current conducting piece (2) away from the current collecting piece (1) abuts against the groove wall of the mounting groove (33).

5. The battery cover plate assembly (100) according to claim 3 or 4, characterized in that, The mounting groove (33) is located at an end of the pole (3) away from the current collecting piece (1), and the groove bottom of the mounting groove (33) is in communication with the connecting hole (31).

6. The battery cover plate assembly (100) of claim 4, wherein, The groove wall of the mounting groove (33) is provided with a first guide inclined surface (34), one side of the extrusion block (321) away from the current conducting piece (2) is provided with a second guide inclined surface (35), the first guide inclined surface (34) and the second guide inclined surface (35) abut against each other, and the first guide inclined surface (34) and the second guide inclined surface (35) cooperate to extrude the end of the current conducting piece (2) away from the current collecting piece (1) to the groove wall of the mounting groove (33) and abut against it.

7. The battery cover plate assembly (100) according to claim 4 or 6, characterized in that, The extrusion block (321) is welded to the end of the current conducting piece (2) away from the current collecting piece (1) and the pole (3); or The extrusion block (321) is bolted to the pole (3).

8. The battery cover plate assembly (100) according to any one of claims 4, 6, 7, characterized in that, The battery cover plate assembly (100) further comprises a pole end cover (4) connected to the pole (3), the pole end cover (4) is used for covering the extrusion block (321), and a gap is left between the extrusion block (321) and the pole end cover (4) in the first direction, the gap is greater than 0.3 mm. The first direction is arranged as the axial direction of the battery cover plate assembly (100).

9. The battery cover plate assembly (100) of claim 8, wherein, The pole (3) is provided with a bearing step, and the pole end cover (4) is welded to the bearing step.

10. The battery cover plate assembly (100) of claim 2, wherein, The accommodating space (7) is configured as an accommodating groove (322) opened on the surface of the pole (3), and the flow guide piece (2) extends into the accommodating groove (322) from the end away from the current collector (1) and is connected and fitted with the groove wall or groove bottom of the accommodating groove (322).

11. The battery cover plate assembly (100) of claim 10, wherein, The accommodating groove (322) is located at the end of the pole (3) away from the current collector (1), the groove bottom of the accommodating groove (322) is communicated with the connecting hole (31), and the end of the flow guide piece (2) away from the current collector (1) extends into the accommodating groove (322) and is bent and welded with the groove bottom of the accommodating groove (322).

12. The battery cover plate assembly (100) according to claim 10 or 11, characterized in that The battery cover plate assembly (100) further comprises a pole end cover (4) connected to the end of the pole (3) away from the current collector (1), and the pole end cover (4) can cover the accommodating groove (322), and in the second direction, a welding gap (8) is left between the flow guide piece (2) and the groove wall of the accommodating groove (322), and the welding gap (8) is greater than 0.2mm, and in the first direction, the groove depth of the accommodating groove (322) is greater than 0.3mm. Wherein, the first direction is set as the axial direction of the battery cover plate assembly (100), and the second direction is set as the radial direction of the battery cover plate assembly (100).

13. The battery cover plate assembly (100) according to any one of claims 1-12, characterized in that, The battery cover plate assembly (100) further comprises a closing cover (52), the pole (3) is connected to the closing cover (52), and the current collector (1) is arranged opposite to the closing cover (52).

14. The battery cover plate assembly (100) of claim 13, wherein, The closing cover (52) is provided with a liquid injection hole (53) and / or an explosion-proof valve (54).

15. The battery cover plate assembly (100) of claim 14, wherein, The liquid injection hole (53) and / or the explosion-proof valve (54) are arranged at the center of the closing cover (52).

16. The battery cover plate assembly (100) according to any one of claims 1-15, characterized in that, In the second direction, an assembly gap (9) is left between the hole wall of the connecting hole (31) and the flow guide piece (2), and the width of the assembly gap (9) is 0.9mm-2.2mm. Wherein, the second direction is set as the radial direction of the battery cover plate assembly (100).

17. The battery cover plate assembly (100) according to any one of claims 1-16, characterized in that, The connecting hole (31) comprises a first hole section (311) and a second hole section (312) connected to each other, the first hole section (311) is close to the current collector (1), the hole diameter of the first hole section (311) is greater than that of the second hole section (312), and the hole diameter of the first hole section (311) gradually decreases in the direction away from the current collector (1) to guide the flow guide piece (2).

18. The battery cover plate assembly (100) according to any one of claims 1-17, characterized in that, The current collector (1) is provided with a liquid passing hole (11) penetrating the current collector (1) in the first direction.

19. The battery cover plate assembly (100) according to any one of claims 1-18, characterized in that, The current collector (1) is configured as a disc structure, and the flow guide piece (2) is configured as a sheet structure, in the first direction, the thickness of the current collector (1) is 0.1mm-0.5mm, and in the second direction, the width of the flow guide piece (2) is 5mm-20mm. Wherein, the first direction is set as the axial direction of the battery cover plate assembly (100), and the second direction is set as the radial direction of the battery cover plate assembly (100). The battery cover plate assembly (100) further comprises a closing cover (52), the pole (3) is connected to the closing cover (52), and the current collector (1) is arranged opposite to the closing cover (52). The closing cover (52) is provided with a liquid injection hole (53) and / or an explosion-proof valve (54). The liquid injection hole (53) and / or the explosion-proof valve (54) are arranged at the center of the closing cover (52). In the second direction, an assembly gap (9) is left between the hole wall of the connecting hole (31) and the flow guide piece (2), and the width of the assembly gap (9) is 0.9mm-2.2mm. Wherein, the second direction is set as the radial direction of the battery cover plate assembly (100). The connecting hole (31) comprises a first hole section (311) and a second hole section (312) connected to each other, the first hole section (311) is close to the current collector (1), the hole diameter of the first hole section (311) is greater than that of the second hole section (312), and the hole diameter of the first hole section (311) gradually decreases in the direction away from the current collector (1) to guide the flow guide piece (2). The current collector (1) is provided with a liquid passing hole (11) penetrating the current collector (1) in the first direction. The current collector (1) is configured as a disc structure, and the flow guide piece (2) is configured as a sheet structure, in the first direction, the thickness of the current collector (1) is 0.1mm-0.5mm, and in the second direction, the width of the flow guide piece (2) is 5mm-20mm. Wherein, the first direction is set as the axial direction of the battery cover plate assembly (100), and the second direction is set as the radial direction of the battery cover plate assembly (100).

20. A battery (200) characterized by, The battery (200) comprises a shell (5) and the battery cover plate assembly (100) as claimed in any one of claims 1-19, and the battery cover plate assembly (100) is connected to the shell (5).

21. The battery (200) of claim 20, wherein, The battery (200) is configured as a cylindrical battery, the number of the battery cover plate assemblies (100) is two, and the two battery cover plate assemblies (100) are connected to two ends of the shell (5), the poles (3) of the two battery cover plate assemblies (100) comprise positive poles (3) and negative poles (3), the positive poles (3) and the negative poles (3) are located at the two ends of the shell (5) respectively, and the number of the current collectors (1) is two, and the two current collectors (1) correspond to the positive poles (3) and the negative poles (3) respectively.

22. The battery (200) of claim 21, wherein, The number of the positive poles (3) and the negative poles (3) is both two, the two positive poles (3) are located at one end of the shell (5), and the two negative poles (3) are located at the other end of the shell (5), and the number of the flow guides (2) on each current collector (1) is two.

23. The battery (200) according to any one of claims 20-22, characterized by, The battery (200) further comprises a winding core (6), the shell (5) is configured as a cylinder (51) with two open ends, the winding core (6) is connected in the cylinder (51), the two battery cover plate assemblies (100) are connected to the two ends of the cylinder (51) respectively and close the two ends of the cylinder (51), the two current collectors (1) are connected to two ends of the winding core (6) respectively, and the flow guides (2) are located on a side of the current collector (1) away from the winding core (6).

24. A battery pack (300) characterized by, The battery (200) comprises the battery cover plate assembly (100) as claimed in any one of claims 1-19.

25. An electrical device (400) characterized by The battery (200) comprises the battery cover plate assembly (100) as claimed in any one of claims 1-19, or the battery (200) as claimed in any one of claims 20-23, or the battery pack (300) as claimed in claim 24.

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