Cover plate component and single-cell battery including the same

Abstract

To provide a cover plate component which can make a liquid injection step quicker, and a single-cell battery including the cover plate component.SOLUTION: The cover plate component includes: a cover plate body 10 provided with a liquid-injection hole 11 penetrating in a thickness direction; an insulator 21; and a projecting part 22 provided on a side of the insulator 21 toward the cover plate body 10, and the projecting part 22 has a liquid guide hole 221 penetrating in the thickness direction, and the liquid guide hole 221 corresponds to the liquid-injection hole 11 and forms a first passage 23 communicating with the liquid-injection hole 11. The insulating member is further provided with a second passage communicating with the first passage 23, the second passage has a first end opening 241 on a side surface of the projecting part 22, and the second passage has a second end opening 242 in the insulator 21. Providing the second passage communicating with the first passage 23 allows an electrolyte to flow into the inside of a single-cell battery through discharge openings of different passages, whereby a liquid-injection step is made quicker.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a cover plate component and a single-cell battery including the same. [Background technology]

[0002] Conventional battery cover plate components include a cover plate body and an insulating member that covers the side of the cover plate body that faces the electrode components (battery cells) located inside the battery.Since the insulating member generally abuts against the electrode components, there is a problem that when injecting electrolyte into the battery cell, the electrolyte injection process is slowed down and it takes a long time for the electrolyte to flow over the wide surface of the electrode components. Summary of the Invention [Problem to be solved by the invention]

[0003] The technical problem to be solved by the present invention is to provide a cover plate component and a single-cell battery including the same, in order to overcome the problem of the slow process of filling the interior of the battery cell in the prior art. [Means for solving the problem]

[0004] The present invention solves the above technical problems by the following technical solutions: a cover plate body having a through-hole formed along the thickness direction; an insulating member including an insulator and a convex portion provided on a side of the insulator facing the cover plate body, the convex portion having a liquid guide hole penetrating along the thickness direction, the liquid guide hole being provided corresponding to the liquid inlet, and forming a first passage communicating with the liquid inlet; a second passage communicating with the first passage is further formed in the insulating member, a first end opening of the second passage is provided on a side surface of the convex portion, and a second end opening of the second passage is provided in the insulator.

[0005] In this technical proposal, a second passage is provided that communicates with the first passage, a first end opening of the second passage is provided on the side of the convex portion, and a second end opening of the second passage is provided in the insulator, so that the electrolyte flows into the inside of the single-cell battery through the outflow opening of a different passage, thereby speeding up the injection process.

[0006] Preferably, the insulator comprises a bottom wall and a side wall, one end of the side wall being connected to the bottom wall and the other end extending toward the cover plate body; The convex portion is provided on the side of the bottom wall facing the cover plate body, and the bottom wall and the side wall surround and form a flow path cavity, which is used to connect the first end opening and the second end opening.

[0007] In this technical proposal, by providing a specific structure for the insulator, a flow path cavity is formed on the side of the insulator facing the cover plate body, and a passage connecting the first end opening and the second end opening is formed.

[0008] Preferably, the second end opening is provided in the side wall and / or the bottom wall.

[0009] In this technical solution, the above-mentioned installation provides a specific installation position for the second end opening. Compared to installing the second end opening on the bottom wall, installing the second end opening on the side wall can prevent the contact surface between the bottom wall and the electrode component from becoming an uneven surface of the opening, and can prevent the opening from adversely affecting the electrode component.

[0010] Preferably, the side walls include a first side wall and a second side wall respectively provided on both sides of the bottom wall along a width direction of the cover plate component, The second end opening comprises at least one of a first opening and a second opening, the first opening being an opening provided in the first side wall, and the second opening being an opening provided in the second side wall.

[0011] In this technical solution, the second end openings are provided in the first or second side walls on both sides of the bottom wall along the width direction of the cover plate component, thereby ensuring a flat contact surface between the bottom wall and the electrode components and preventing the openings from adversely affecting the electrode components.Furthermore, the second end openings are provided in both the first and second side walls, which increases the number of locations through which the electrolyte can flow into the single-cell battery in multiple directions.

[0012] Preferably, the first opening comprises a plurality of spaced apart first openings; and / or The second opening comprises a plurality of spaced apart second openings.

[0013] In this technical solution, the above-mentioned installation provides an opening through which more electrolyte can flow into the single-cell battery.

[0014] Preferably, the plurality of first openings are provided symmetrically with the plurality of second openings along the width direction.

[0015] In this technical solution, the plurality of first openings are symmetrically arranged with the plurality of second openings along the width direction, so that the amount of electrolyte flowing into the single-cell battery from the first side wall and the second side wall is uniform, ensuring that the electrolyte is more uniformly distributed inside the single-cell battery.In addition, the electrolyte flows into the single-cell battery from the first side wall and the second side wall at the same flow rate, improving the liquid inflow efficiency.

[0016] Preferably, the cover plate component further comprises: an electrode leading member provided to pass through the first electrode leading hole of the insulator and the second electrode leading hole of the cover plate body in this order; an explosion-proof component provided in the exhaust hole of the cover plate body, the explosion-proof component having an exhaust region provided in a position facing the exhaust hole of the insulator along the thickness direction, a liquid injection region is provided between the first electrode lead-out hole and the exhaust region of the insulator, and a projection of the liquid injection hole along the thickness direction is located within the liquid injection region; The first opening of the second passage is located in the injection area, and / or the second opening of the second passage is located in the injection area.

[0017] In this technical solution, by providing the first opening in the injection region, the first opening is closer to the injection hole, reducing the flow path between the first end opening and the second end opening. By providing the second opening in the injection region, the second opening is closer to the injection hole, reducing the flow path between the first end opening and the second end opening.

[0018] Preferably, the side of the exhaust region away from the cover plate body is a first plane, the side of the liquid injection region away from the cover plate body is a second plane, and the first plane and the second plane are located in the same plane.

[0019] In this technical proposal, by arranging the first plane and the second plane in the same plane, it is possible to ensure that the contact surface between the insulator and the electrode component is flat, and it is possible to prevent the protrusions of the insulator from breaking through the electrode component and causing adverse effects such as a short circuit.

[0020] Preferably, the exhaust area and the liquid injection area are integrally formed.

[0021] In this technical solution, the exhaust area and the liquid injection area are molded as a single unit, thereby improving the overall strength of the insulator.

[0022] Preferably, the insulator further includes an electrode region in which the first electrode lead-out hole is provided, and a recess for accommodating the electrode lead-out member is provided on a side of the electrode region away from the cover plate body, Along the thickness direction, the height difference between the end face of the electrode leading member and the second plane is 0.5 mm or less, and the end face of the electrode leading member is the end face of the electrode leading member that is farthest from the cover plate body.

[0023] In this technical solution, by setting the range of the height difference between the end face of the electrode lead-out member and the second plane, it is possible to ensure that the contact surface between the insulator and the electrode part is basically a flat surface, and to prevent the transition step between the different surfaces from breaking through the electrode part, causing a short circuit and adverse effects.

[0024] Preferably, the end surface of the electrode lead-out member and the second flat surface are located in the same plane.

[0025] In this technical proposal, by arranging the end face of the electrode lead-out member and the second plane so that they are positioned in the same plane, it is possible to ensure that the contact surface between the insulator and the electrode component is a flat surface, and to prevent the opening from adversely affecting the electrode component.

[0026] Preferably, the exhaust area further includes a reinforcing rib provided on the bottom wall, the height of the reinforcing rib being equal to or less than the height of the higher of the first side wall and the second side wall.

[0027] In this technical solution, by providing a reinforcing rib in the exhaust area, the structural strength of the entire exhaust area of ​​the insulator can be strengthened. Furthermore, by setting the height of the reinforcing rib to be equal to or less than the height of the taller of the first and second side walls, the reinforcing rib can be prevented from interfering with the assembly between the insulator and the cover plate body.

[0028] Preferably, the reinforcing rib is connected between the first side wall and the second side wall, the first side wall and the second side wall each abut against the cover plate body; There is a gap between the reinforcing rib and the cover plate body.

[0029] In this technical solution, the above installation provides a specific installation method for the reinforcing rib.

[0030] Preferably, the area of ​​the first opening is 10%-90% of the area of ​​the first side wall located in the liquid injection area, and / or the area of ​​the second opening is 10%-90% of the area of ​​the second side wall located in the liquid injection area.

[0031] In this technical solution, by limiting the area range of the first opening, a larger amount of electrolyte can be simultaneously introduced into the single-cell battery while maximizing the support strength of the first side wall of the insulating member, thereby enabling the injection process to be completed more quickly. By limiting the area range of the second opening, a larger amount of electrolyte can be simultaneously introduced into the single-cell battery while maximizing the support strength of the second side wall of the insulating member, thereby enabling the injection process to be completed more quickly.

[0032] Preferably, a hot melt region for connection to the insulating covering member is provided on the outer surface of the side wall, and the second end opening of the second passage is spaced apart from the hot melt region.

[0033] In this technical proposal, by arranging the second end opening of the second passage at a distance from the hot melt area, it is possible to prevent the second end opening from interfering with the connection of the coated insulating member.

[0034] Preferably, the first end opening of the second passage is a plurality of openings, and is provided at intervals on the convex portion along the circumferential direction of the liquid guide hole.

[0035] In this technical solution, by providing multiple first end openings, it is possible to provide openings that allow more electrolyte to flow into the second passage. Furthermore, by providing multiple first end openings at intervals on the convex portion along the circumferential direction of the liquid guide hole, it is possible to more uniformly allow the electrolyte to flow into the second passage.

[0036] Preferably, the first end opening of the second passage is a recessed groove or a through hole, and / or the second end opening of the second passage is a recessed groove or a through hole.

[0037] In this technical solution, the above installation provides a specific installation method for the first end opening and the second end opening.

[0038] Preferably, a projection of the liquid inlet hole along the thickness direction is located within an outer circumferential edge of the liquid guide hole.

[0039] In this technical solution, the projection of the liquid inlet along the thickness direction is located within the outer peripheral edge of the liquid guide hole, so that all of the electrolyte flowing in from the liquid inlet can be put into the liquid guide hole and then flow into the single-cell battery according to the specified passage. In other words, the electrolyte can be flowed into the single-cell battery through the liquid outflow openings located at different positions in different specified passages, which can speed up the liquid inlet process and reduce the risk of a loose diaphragm blocking the liquid inlet in the opposite direction.

[0040] Preferably, the insulator comprises a first part and a second part connected along the length direction, each of the first part and the second part having a main body and a connecting part, the main body of the first part and the main body of the second part each having a first electrode derivation hole, an electrode derivation member is provided to pass through the first electrode derivation hole, and the connecting part of the first part and the connecting part of the second part are connected and overlapped along the thickness direction.

[0041] In this technical solution, the insulator comprises a first part and a second part connected along the length, and the specific structure and connection method of the first part and the second part make it easy to assemble and disassemble the insulator.

[0042] Preferably, the side of the body of the first part away from the cover plate body is a first side, the side of the body of the second part away from the cover plate body is a second side, the first side and the second side are both flat surfaces and located in the same plane, the side of the connection part of the first part away from the cover plate body is a third side, the side of the connection part of the second part away from the cover plate body is a fourth side, and the third side and the fourth side are both recessed into the plane where the first side and the second side are located along a direction closer to the cover plate body.

[0043] In this technical solution, the first and second sides are both flat and located in the same plane, ensuring that the contact surface between the insulator and the electrode component is flat and preventing the opening from adversely affecting the electrode component.Furthermore, the third and fourth sides are both recessed into the planes located on the first and second sides along a direction close to the cover plate body, preventing the third and fourth sides from affecting the flatness of the contact surface between the insulator and the electrode component.

[0044] Preferably, the insulating member further includes a fastening component, the fastening component including a first fastening member and a second fastening member that are fastened together, the first fastening member being provided at the connection portion of the first part, the second fastening member being provided at the connection portion of the second part corresponding to the first fastening member, and the side of the fastening component away from the cover plate body being recessed into a plane on which the first side and the second side are located along a direction closer to the cover plate body.

[0045] In this technical solution, the fastening element is provided to provide a specific connection method for the first and second parts, and the manufacturing and assembly of the first and second parts is facilitated. The fastening element is recessed on a plane with a first side and a second side along a direction closer to the cover plate body on the side away from the cover plate body, which prevents the fastening element from breaking through the electrode part and causing adverse effects such as a short circuit.

[0046] Housing and a cover plate component according to claim 1 provided on the housing and defining a receiving cavity together with the housing; and an electrode component accommodated in the accommodating cavity. [Effects of the Invention]

[0047] The positive and progressive effects of the present invention are as follows: In the present invention, by providing a specific structure for the insulating member, by providing a second passage communicating with the first passage, by providing a first end opening of the second passage on the side surface of the convex portion, and by providing a second end opening of the second passage in the insulator, the electrolyte can be made to flow into the inside of the single-cell battery through outflow openings located at different positions in different passages, and the injection process can be speeded up. [Brief explanation of the drawings]

[0048] [Figure 1] 1 is a schematic diagram of an exploded view of a single-cell battery according to a preferred embodiment of the present invention; [Figure 2] 1 is a schematic diagram of the three-dimensional structure of a cover plate component and an electrode component according to a preferred embodiment of the present invention; [Figure 3] 1 is a schematic diagram of a three-dimensional structure of a cover plate component according to a preferred embodiment of the present invention; [Figure 4] FIG. 4 is a partially enlarged structural view of part A in FIG. 3. [Figure 5] 10 is a schematic three-dimensional structural view of a cover plate component according to a preferred embodiment of the present invention from another angle. [Figure 6] 3 is a schematic diagram showing the three-dimensional structure of an insulator and an electrode lead member of a cover plate component according to a preferred embodiment of the present invention; FIG. [Figure 7] 1 is a cross-sectional structural schematic diagram of a cover plate component according to a preferred embodiment of the present invention; [Figure 8] FIG. 8 is a partially enlarged structural view of part B in FIG. 7. [Figure 9]FIG. 8 is a partially enlarged structural view of part C in FIG. 7. [Figure 10] 1 is a partial three-dimensional structural schematic view of an insulator of a cover plate assembly according to a preferred embodiment of the present invention; [Figure 11] FIG. 11 is a partially enlarged structural view of part D in FIG. [Figure 12] 10 is a partial three-dimensional structural schematic view of an insulator of a cover plate assembly according to a preferred embodiment of the present invention from another angle. [Figure 13] 1 is a partial front structural schematic view of an insulator of a cover plate assembly according to a preferred embodiment of the present invention; [Figure 14] 10 is a schematic view of the three-dimensional structure of an insulator of a cover plate component according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0049] The present invention will be explained more clearly and completely in the following preferred embodiments in conjunction with the accompanying drawings.

[0050] 1 and 2, this embodiment provides a cover plate component 2 and a single-cell battery 1 including the same. The single-cell battery 1 includes a housing 3, the cover plate component 2, and an electrode component 4.

[0051] The cover plate part 2 is mounted on a housing 3 and together with the housing defines a receiving cavity, in which an electrode part 4 is received.

[0052] As shown in FIGS. 3 to 14, the cover plate component 2 includes a cover plate body 10 and an insulating member 20. As shown in FIGS.

[0053] The cover plate body 10 is provided with a liquid injection hole 11 that penetrates along the thickness direction T of the cover plate body 10.

[0054] The insulating member 20 comprises an insulator 21 and a protrusion 22 provided on the cover plate main body 10 side of the insulator 21, and the protrusion 22 is provided with a liquid guide hole 221 that penetrates along the thickness direction T, and the liquid guide hole 221 is provided corresponding to the liquid injection hole 11, and a first passage 23 that communicates with the liquid injection hole 11 is formed.

[0055] The insulating member 20 further has a second passage 24 that communicates with the first passage 23, a first end opening 241 of the second passage 24 provided on the side of the protrusion 22, and a second end opening 242 of the second passage 24 provided in the insulator 21.

[0056] In this way, by providing a second passage 24 communicating with the first passage 23, providing a first end opening 241 of the second passage 24 on the side surface of the convex portion 22, and providing a second end opening 242 of the second passage 24 in the insulator 21, the electrolyte flows into the interior (accommodation cavity) of the single-cell battery 1 through the outflow opening of a different passage, thereby speeding up the injection process.

[0057] In addition, in the prior art, a negative pressure pumping process is also performed inside the battery as part of the liquid injection process, but because the diaphragm loosens after hot pressing, there is a risk that the loosened diaphragm will block the liquid injection hole in the opposite direction during the negative pressure pumping process, causing the battery's negative pressure pumping to fail and failing to meet the requirements of the battery manufacturing process. However, in this embodiment, the second end opening 242 is provided in the second passage 24 located in the insulator 21, thereby reducing the risk that the loosened diaphragm will block the liquid injection hole 11 in the opposite direction.

[0058] Specifically, the insulator 21 has a bottom wall 211 and a side wall 212, one end of the side wall 212 connected to the bottom wall 211 and the other end extending toward the cover plate body 10. The protrusion 22 is provided on the bottom wall 211 facing the cover plate body 10, and the bottom wall 211 and the side wall 212 surround and form a flow path cavity 210, which is used to communicate between the first end opening 241 and the second end opening 242. In this way, by providing a specific structure for the insulator 21, the flow path cavity 210 is formed on the side of the insulator 21 facing the cover plate body 10, and a passage communicating between the first end opening 241 and the second end opening 242 is formed. In Figure 11, the electrolyte flows into the single-cell battery 1 along the second passage 24 (in the direction of the white arrow), that is, the electrolyte flows into the single-cell battery 1 in the order of the first end opening 241, the flow path cavity 210, and the second end opening 242.

[0059] In the present embodiment, the second end opening 242 is provided in the side wall 212. However, this is not limited to this, and in other embodiments, the second end opening 242 may be provided in the bottom wall 211, or the second end opening 242 may be provided in the side wall 212 and the bottom wall 211. Compared to when the second end opening 242 is provided in the bottom wall 211, when the second end opening 242 is provided in the side wall 212, it is possible to prevent the contact surface between the bottom wall 211 and the electrode part 4 from becoming an uneven surface of the opening, and it is possible to prevent the opening from adversely affecting the electrode part 4.

[0060] Furthermore, the side wall 212 includes a first side wall 2121 and a second side wall 2122 provided on either side of the bottom wall 211 along the width direction W of the cover plate component 2. The second end opening 242 includes a first opening 2421 and a second opening 2422, where the first opening 2421 is an opening provided in the first side wall 2121 and the second opening 2422 is an opening provided in the second side wall 2122. However, this is not limited thereto, and in other embodiments, the second end opening 242 may include only the first opening 2421 or only the second opening 2422.

[0061] In this way, by providing the second end openings 242 in the first side walls 2121 or the second side walls 2122 on both sides of the bottom wall 211 along the width direction W of the cover plate component 2, it is possible to ensure that the contact surface between the bottom wall 211 and the electrode component 4 is flat, and to prevent the openings from adversely affecting the electrode component 4. Furthermore, by providing the second end openings 242 simultaneously in the first side wall 2121 and the second side wall 2122, it is possible to increase the number of positions through which the electrolyte can flow into the single-cell battery in multiple directions.

[0062] The first opening 2421 includes a plurality of first openings spaced apart. The second opening 2422 includes a plurality of second openings spaced apart. In this embodiment, specifically, the first opening 2421 includes two first openings spaced apart. The second opening 2422 includes three second openings spaced apart. In other embodiments, the number of first openings may be three, four, or another number. Similarly, the number of second openings may be two, four, or another number. In this way, by providing a plurality of first openings spaced apart and a plurality of second openings spaced apart, openings are provided through which more electrolyte can flow into the single-cell battery 1.

[0063] In this embodiment, two first openings located in the first side wall 2121 are alternately arranged with three first openings located in the second side wall 2122 along the width direction W. However, this is not limited to this, and in other embodiments, multiple first openings may be arranged symmetrically with multiple second openings along the width direction W. By arranging multiple first openings symmetrically with multiple second openings along the width direction W in this manner, the amount of electrolyte flowing into the single-cell battery 1 from the first side wall 2121 and the second side wall 2122 becomes uniform, ensuring more uniform distribution of the electrolyte inside the single-cell battery 1. Furthermore, it is possible to ensure that the electrolyte flows into the single-cell battery 1 from the first side wall 2121 and the second side wall 2122 at the same flow rate, improving the efficiency of liquid inflow.

[0064] The cover plate component 2 further includes an electrode lead-out member 30 and an explosion-proof component 40. The electrode lead-out member 30 is provided by sequentially passing through the first electrode lead-out hole 213 of the insulator 21 and the second electrode lead-out hole of the cover plate main body 10. The explosion-proof component 40 is provided in the exhaust hole 41 of the cover plate main body 10, and an exhaust region 214 is provided at a position facing the exhaust hole 41 of the insulator 21 along the thickness direction T. A liquid injection region 215 is provided between the first electrode lead-out hole 213 of the insulator 21 and the exhaust region 214, and the projection of the liquid injection hole 11 along the thickness direction T is located within the liquid injection region 215.

[0065] In this embodiment, the first opening 2421 and the second opening 2422 of the second passage 24 are both located in the liquid injection region 215, and by bringing the first opening 2421 and the second opening 2422 closer to the liquid injection hole 11, the flow path between the first end opening 241 and the second end opening 242 is reduced. However, this is not limited to this, and in other embodiments, the first opening 2421 of the second passage 24 may be located in the liquid injection region 215 and the second opening 2422 may be located in another region such as the exhaust region 214, or the second opening 2422 of the second passage 24 may be located in the liquid injection region 215 and the first opening 2421 may be located in another region.

[0066] In this embodiment, the side of the exhaust area 214 away from the cover plate body 10 is the first plane 2141, and the side of the liquid injection area 215 away from the cover plate body 10 is the second plane 2151, with the first plane 2141 and the second plane 2151 being located on the same plane. By providing the first plane 2141 and the second plane 2151 on the same plane in this way, it is possible to ensure that the contact surface between the insulator 21 and the electrode component 4 is flat, and it is possible to prevent the protrusions of the insulator 21 from breaking through the electrode component 4 and causing adverse effects such as a short circuit.

[0067] Preferably, the exhaust region 214 and the injection region 215 are integrally formed to improve the overall strength of the insulator 21 .

[0068] The insulator 21 further includes an electrode region 216 in which the first electrode leading hole 213 is provided, and a recess 2161 for accommodating the electrode leading member 30 is provided on the side of the electrode region 216 away from the cover plate body 10. The difference in height between the electrode leading member end surface 31 and the second flat surface 2151 along the thickness direction T is 0.5 mm, and may be 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm, 0.1 mm, 0 mm, or the like. The electrode leading member end surface 31 is the end surface of the electrode leading member 30 away from the cover plate body 10. By setting the range of the difference in height between the electrode leading member end surface 31 and the second flat surface 2151 in this manner, it is possible to ensure that the contact surface between the insulator 21 and the electrode component 4 is essentially flat, and to prevent a transitional step between different surfaces from breaking through the electrode component 4, causing a short circuit and adverse effects. The difference in height between the electrode leading member end surface 31 and the second flat surface 2151 means the difference in size along the thickness direction T between the electrode leading member end surface 31 and the second flat surface 2151.

[0069] 5 again, in this embodiment, the electrode leading member end face 31 and the second flat surface 2151 are located in the same plane. By arranging the electrode leading member end face 31 and the second flat surface 2151 to be located in the same plane in this way, it is possible to ensure that the contact surface between the insulator 21 and the electrode part 4 is a flat surface, and to prevent the opening from adversely affecting the electrode part 4.

[0070] The exhaust region 214 is further provided with a reinforcing rib 2142, which is provided on the bottom wall 211 and has a height equal to or less than the height of the taller of the first and second side walls 2121 and 2122. By providing the reinforcing rib 2142 in the exhaust region 214 in this manner, the structural strength of the entire exhaust region of the insulator 21 can be enhanced. Furthermore, by setting the height of the reinforcing rib 2142 to be equal to or less than the height of the taller of the first and second side walls 2121 and 2122, the reinforcing rib 2142 can be prevented from interfering with the assembly of the insulator 21 and the cover plate body 10.

[0071] Preferably, the reinforcing rib 2142 is connected between the first side wall 2121 and the second side wall 2122 to improve the structural strength of the insulator in the width direction W. The first side wall 2121 and the second side wall 2122 each abut against the cover plate body 10. There is a gap between the reinforcing rib 2142 and the cover plate body 10, which does not affect the assembly between the insulator and the cover plate body 10.

[0072] Preferably, the area of ​​the first opening 2421 is 10% to 90% of the area of ​​the first side wall 2121 located in the liquid injection region 215, and may be 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, etc., and / or the area of ​​the second opening 2422 is 10% to 90% of the area of ​​the second side wall 2122 located in the liquid injection region 215, and may be 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, etc. By limiting the area of ​​the first opening 2421 in this way, a larger amount of electrolyte can be simultaneously flowed into the single-cell battery 1 while maximizing the support strength of the first side wall 2121 of the insulating member 20, and the liquid injection process can be completed more quickly. By limiting the area range of the second opening 2422, it is possible to maximize the support strength of the second side wall 2122 of the insulating member 20 while simultaneously allowing more electrolyte to flow into the single-cell battery 1, thereby completing the injection process more quickly.

[0073] A hot melt region for connection to the covering insulating member is provided on the outer surface of the side wall 212, and the second end opening 242 of the second passage 24 is provided at a distance from the hot melt region. By providing the second end opening 242 of the second passage 24 at a distance from the hot melt region in this manner, it is possible to prevent the second end opening 242 from interfering with the connection of the covering insulating member.

[0074] The second passage 24 has a plurality of first end openings 241, which are spaced apart on the protrusion 22 along the circumferential direction of the liquid guide hole 221. In the present embodiment, the number of first end openings 241 of the second passage 24 is six, but this is not limited thereto. In other embodiments, the number of first openings may be two, three, four, or any other number. By providing a plurality of first end openings 241 in this manner, openings that allow a larger amount of electrolyte to flow into the second passage 24 can be provided. Furthermore, by providing a plurality of first end openings 241 at intervals on the protrusion 22 along the circumferential direction of the liquid guide hole 221, the electrolyte can flow more uniformly into the second passage 24.

[0075] In this embodiment, the first end opening 241 of the second passage 24 is a recessed groove, and similarly, the second end opening 242 of the second passage 24 is a recessed groove. However, this is not limited thereto, and in other embodiments, the first end opening 241 of the second passage 24 may be a through hole, and the second end opening 242 of the second passage 24 may be a through hole.

[0076] Preferably, the projection of the liquid inlet 11 along the thickness direction T is located within the outer periphery of the liquid guide hole 221. In this way, by locating the projection of the liquid inlet 11 along the thickness direction T within the outer periphery of the liquid guide hole 221, all of the electrolyte flowing in from the liquid inlet 11 can enter the liquid guide hole 221 and flow into the interior 1 of the single-cell battery according to predetermined passages. In other words, the electrolyte can flow into the interior 1 of the single-cell battery through outlet openings located at different positions in different predetermined passages, which speeds up the liquid inlet process and reduces the risk of a loose diaphragm blocking the liquid inlet 11 in the opposite direction.

[0077] 5 and 9 again, the insulator 21 includes a first portion 217 and a second portion 218 connected along the length direction L, and the first portion 217 and the second portion 218 each include a main body and a connecting portion, the first portion main body 2171 and the second portion main body 2181 are each provided with a first electrode leading hole 213, the electrode leading member is provided to penetrate the first electrode leading hole 213, and the connecting portion 2172 of the first portion and the connecting portion 2182 of the second portion are connected to each other and overlap each other along the thickness direction T. In this way, the insulator 21 includes the first portion 217 and the second portion 218 connected along the length direction L, and the specific structure and connection method of the first portion 217 and the second portion 218 make it possible to easily assemble and disassemble the insulator 21.

[0078] Furthermore, the side of the first part body 2171 away from the cover plate body 10 is the first side 21711, the side of the second part body 2181 away from the cover plate body 10 is the second side 21811, the first side 21711 and the second side 21811 are both flat surfaces and are located in the same plane, the side of the first part connection portion 2172 away from the cover plate body 10 is the third side 21721, the side of the second part connection portion 2182 away from the cover plate body 10 is the fourth side 21821, and both the third side 21721 and the fourth side 21821 are recessed into the plane where the first side 21711 and the second side 21811 are located along a direction closer to the cover plate body 10. In this way, by providing the first side 21711 and the second side 21811 as flat surfaces and positioned in the same plane, it is possible to ensure that the contact surface between the insulator 21 and the electrode component 4 is flat, and to prevent the openings from adversely affecting the electrode component 4. Furthermore, by having the third side 21721 and the fourth side 21821 both recessed into the planes located on the first side 21711 and the second side 21811 along a direction closer to the cover plate body 10, it is possible to prevent the third side 21721 and the fourth side 21821 from affecting the contact surface between the insulator 21 and the electrode component 4 being flat.

[0079] In this embodiment, the insulating member 20 further includes a fastening component 25, which includes a first fastening member 251 and a second fastening member 252 that are fastened together, the first fastening member 251 being provided at the connecting portion 2172 of the first part, and the second fastening member 252 being provided at the connecting portion 2182 of the second part corresponding to the first fastening member 251, and the side of the fastening component 25 away from the cover plate body 10 is recessed into a plane on which the first side 21711 and the second side 21811 are located along a direction closer to the cover plate body 10. Thus, the provision of the fastening component 25 provides a specific method for connecting the first part 217 and the second part 218, and facilitates the manufacture and assembly of the first part 217 and the second part 218. By recessing the fastening member 25 into a plane with a first side 21711 and a second side 21811 along a direction closer to the cover plate body 10 on the side away from the cover plate body 10, it is possible to prevent the fastening member 25 from breaking through the electrode part 4 and causing adverse effects such as a short circuit.

[0080] Referring again to Figure 14, this figure is a schematic diagram of the three-dimensional structure of another embodiment of the insulator according to the present invention. In this embodiment, the first portion 217 and the second portion 218 of the insulator are integrally formed. Note that the dotted lines in Figure 14 do not exist in the actual structure and are used only to indicate the first portion 217 and the second portion 218 in the integral structure of the insulator.

[0081] In this embodiment, by providing a specific structure for the insulating member 20, providing a second passage 24 communicating with the first passage 23, providing a first end opening 241 of the second passage 24 on the side surface of the protrusion 22, and providing a second end opening 242 of the second passage 24 in the insulator 21, the electrolyte can be made to flow into the single-cell battery 1 through outflow openings located at different positions in different passages, thereby speeding up the injection process and reducing the risk of a loosened diaphragm blocking the injection hole 11 in the opposite direction.

[0082] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that these are for illustrative purposes only, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, and all such changes and modifications fall within the protection scope of the present invention. [Industrial Applicability]

[0083] The cover plate assembly and the single-cell battery including the same of the present invention overcome the drawback of the prior art that the process of filling the interior of the battery cell with liquid is slow, and speeds up the process of filling the liquid. [Explanation of symbols]

[0084] Single cell battery 1 Cover plate part 2 Cover plate body 10 Liquid injection hole 11 Insulating member 20 Insulator 21 Flow path cavity 210 Bottom wall 211 side wall 212 First side wall 2121 Second side wall 2122 First electrode lead-out hole 213 Exhaust area 214 1st plane 2141 Reinforcement rib 2142 Liquid injection area 215 2nd plane 2151 Electrode area 216 Recess 2161 Part 1 217 First part body 2171 1st side 21711 First part connection 2172 3rd side 21721 2nd part 218 Second part body 2181 2nd side 21811 Second part connection 2182 4th side 21821 Convex part 22 Liquid guide hole 221 1st aisle 23 2nd aisle 24 First end opening 241 Second end opening 242 First opening 2421 Second opening 2422 Fasteners 25 First fastening member 251 Second fastening member 252 Electrode lead-out member 30 Electrode lead member end surface 31 Explosion-proof parts 40 Exhaust vent 41 Housing 3 Electrode part 4

Claims

1. a cover plate body having a through-hole formed along the thickness direction; an insulating member including an insulator and a convex portion provided on a side of the insulator facing the cover plate body, the convex portion having a liquid guide hole penetrating along the thickness direction, the liquid guide hole being provided corresponding to the liquid inlet, and forming a first passage communicating with the liquid inlet; a second passage communicating with the first passage is further formed in the insulating member, a first end opening of the second passage is provided on a side surface of the convex portion, and a second end opening of the second passage is provided in the insulator.

2. the insulator includes a bottom wall and a side wall, one end of the side wall being connected to the bottom wall and the other end extending toward the cover plate body; 2. The cover plate part according to claim 1, wherein the protrusion is provided on the side of the bottom wall facing the cover plate body, the bottom wall and the side wall surround and form a flow path cavity, and the flow path cavity is used to communicate the first end opening and the second end opening.

3. The cover plate component of claim 2 , wherein the second end opening is provided in the side wall and / or the bottom wall.

4. The side walls include a first side wall and a second side wall respectively provided on both sides of the bottom wall along a width direction of the cover plate component, 3. The cover plate component of claim 2, wherein the second end opening comprises at least one of a first opening and a second opening, the first opening being an opening in the first side wall, and the second opening being an opening in the second side wall.

5. the first opening comprises a plurality of spaced apart first openings; and / or The cover plate component of claim 4 , wherein the second opening comprises a plurality of spaced apart second openings.

6. The cover plate component according to claim 5 , wherein the first openings are symmetrically arranged with respect to the second openings along the width direction.

7. The cover plate component further comprises: an electrode lead-out member provided to pass through the first electrode lead-out hole of the insulator and the second electrode lead-out hole of the cover plate body in this order; an explosion-proof component provided in the exhaust hole of the cover plate body, the explosion-proof component having an exhaust region provided in a position facing the exhaust hole of the insulator along the thickness direction, a liquid injection region is provided between the first electrode lead-out hole and the exhaust region of the insulator, and a projection of the liquid injection hole along the thickness direction is located within the liquid injection region; The cover plate component according to claim 4 , wherein the first opening of the second passage is located in the liquid injection area and / or the second opening of the second passage is located in the liquid injection area.

8. The cover plate component according to claim 7, wherein a side of the exhaust region away from the cover plate body is a first plane, a side of the liquid injection region away from the cover plate body is a second plane, and the first plane and the second plane are located in the same plane.

9. The cover plate component according to claim 8 , wherein the exhaust area and the liquid injection area are integrally formed.

10. the insulator further includes an electrode region in which the first electrode lead-out hole is provided, and a recess for accommodating the electrode lead-out member is provided on a side of the electrode region away from the cover plate body, 9. The cover plate component according to claim 8, wherein the height difference between the end face of the electrode leading member and the second plane along the thickness direction is 0.5 mm or less, and the end face of the electrode leading member is the end face of the electrode leading member that is farther from the cover plate body.

11. The cover plate component according to claim 10 , wherein the end surface of the electrode lead-out member and the second flat surface are located in the same plane.

12. 8. The cover plate component of claim 7, further comprising a reinforcing rib provided in the exhaust region, the reinforcing rib being provided on the bottom wall, and the height of the reinforcing rib being equal to or less than the height of a higher one of the first side wall and the second side wall.

13. the reinforcing rib is connected between the first side wall and the second side wall, the first side wall and the second side wall each abut against the cover plate body; The coverplate component of claim 12 , wherein there is a gap between the reinforcing rib and the coverplate body.

14. 8. The cover plate component of claim 7, wherein an area of ​​the first opening is 10%-90% of an area of ​​the first side wall located in the liquid injection region, and / or an area of ​​the second opening is 10%-90% of an area of ​​the second side wall located in the liquid injection region.

15. 4. The cover plate component according to claim 3, wherein a hot melt area for connecting to an insulating covering member is provided on an outer surface of the side wall, and the second end opening of the second passage is spaced apart from the hot melt area.

16. 2. The cover plate component according to claim 1, wherein the first end openings of the second passage are multiple and are spaced apart from one another in the circumferential direction of the liquid guide hole.

17. The cover plate component of claim 1 , wherein the first end opening of the second passage is a groove or a through hole, and / or the second end opening of the second passage is a groove or a through hole.

18. 2. The cover plate part according to claim 1, wherein a projection of the liquid inlet hole along the thickness direction is located within an outer circumferential edge of the liquid guide hole.

19. 2. The cover plate component of claim 1, wherein the insulator comprises a first portion and a second portion connected along the length direction, the first portion and the second portion each having a main body and a connecting portion, the main body of the first portion and the main body of the second portion each having a first electrode lead-out hole, an electrode lead-out member is provided to penetrate the first electrode lead-out hole, and the connecting portion of the first portion and the connecting portion of the second portion are connected and overlapped along the thickness direction.

20. 20. The cover plate part of claim 19, wherein the side of the body of the first part away from the cover plate body is a first side, the side of the body of the second part away from the cover plate body is a second side, the first side and the second side are both flat surfaces and located in the same plane, the side of the connection part of the first part away from the cover plate body is a third side, the side of the connection part of the second part away from the cover plate body is a fourth side, and the third side and the fourth side are both recessed into a plane on which the first side and the second side are located along a direction closer to the cover plate body.

21. The cover plate part of claim 20, characterized in that the insulating member further comprises a fastening component, the fastening component comprising a first fastening member and a second fastening member that are fastened together, the first fastening member being provided at the connection portion of the first part, the second fastening member being provided at the connection portion of the second part corresponding to the first fastening member, and the side of the fastening component away from the cover plate body being recessed into a plane on which the first side and the second side are located along a direction closer to the cover plate body.

22. Housing and a cover plate component according to claim 1 provided on the housing and defining a receiving cavity together with the housing; and an electrode component accommodated in the accommodating cavity.

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