Cover plate assembly for battery shell, battery shell, battery and electric equipment

Abstract

The utility model discloses a cover plate assembly used for a battery shell, the battery shell, a battery and electric equipment, the cover plate assembly used for the battery shell comprises a cover plate body, the cover plate body is provided with a communication port in a penetrating manner in the thickness direction; the splitter plate is arranged on the cover plate body and covers the communicating port, and at least one splitter hole is formed in the splitter plate; and the fixing plate is arranged on the side, away from the communicating opening, of the splitter plate, and the fixing plate is fixedly connected with the cover plate body and is suitable for deforming after a preset temperature is reached. According to the cover plate assembly for the battery shell designed by the utility model, the communicating port has the functions of liquid injection, liquid supplementation, air exhaust, heat removal and the like, so that the injection space of electrolyte can be increased while the air exhaust and heat removal effects are ensured, and the safety performance of a battery is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a cover plate assembly for a battery housing, a battery housing, a battery and electrical equipment. Background Art

[0002] In the related art, an explosion-proof valve is provided on the battery shell to exhaust and dissipate air and heat when the battery cell thermally runs away. The battery shell is also provided with an injection hole for injecting electrolyte into the shell. In some existing technologies, two poles are penetrated through the shell, and the explosion-proof valve and the injection hole are provided between the two poles. The area of the explosion-proof valve is insufficient, the exhaust and heat dissipation effect is limited, and the aperture of the injection hole is also limited, so that the injection space of the electrolyte is limited. In addition, the impact force on the battery cell when the electrolyte is injected is relatively large, which will cause the diaphragm, pole piece and other structures of the battery cell to deform and be damaged. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose a cover plate assembly for a battery housing. The cover plate assembly for a battery housing designed according to the utility model has a connecting port that has the functions of liquid injection, liquid replenishment, exhaust, and heat dissipation, which can increase the injection space of the electrolyte while ensuring the exhaust and heat dissipation effect, thereby improving the safety performance of the battery.

[0004] The utility model also provides a battery housing having the cover plate assembly.

[0005] The utility model also provides a battery having the battery housing.

[0006] The utility model also provides an electrical device having the battery.

[0007] According to the utility model, the cover plate assembly for the battery shell includes: a cover plate body, the cover plate body is provided with a connecting port in the thickness direction; a diverter plate, the diverter plate is arranged on the cover plate body and covers the connecting port, and at least one diverter hole is arranged on the diverter plate; the fixing plate is arranged on the side of the diverter plate away from the connecting port, the fixing plate is fixedly connected to the cover plate body and is suitable for deforming after reaching a preset temperature.

[0008] The cover plate assembly for the battery shell designed according to the utility model integrates the explosion-proof structure and the liquid injection structure on the battery shell into one place, thereby improving the overall integration. The connecting port thereof has the functions of liquid injection, fluid replenishment, exhaust, and heat dissipation, thereby ensuring the layout area of the liquid injection structure of the explosion-proof structure, increasing the injection space of the electrolyte while ensuring the exhaust and heat dissipation effect, and being able to timely, quickly, and effectively perform exhaust and heat dissipation, thereby avoiding further failure of the battery cell and improving the safety performance of the battery.

[0009] According to some embodiments of the present utility model, an installation groove is formed on one side surface of the cover plate body, a communication port is formed on a part of the bottom wall of the installation groove, and the flow dividing plate is received in the installation groove.

[0010] According to some embodiments of the present utility model, the fixing plate is arranged at an interval from the bottom wall of the installation groove to form a gap, the flow dividing plate is arranged in the gap, the projection of the flow dividing plate in the thickness direction is located inside the projection of the fixing plate in the thickness direction, and the fixing plate is connected to the bottom wall of the installation groove.

[0011] According to some embodiments of the present utility model, the cover plate assembly for the battery housing further includes: a bracket, at least part of the bracket is arranged in the communication port and is attached to the inner wall surface of the communication port, and the bracket abuts against the surface of the flow dividing plate facing the communication port.

[0012] According to some embodiments of the present utility model, a connecting protrusion protruding towards the communication port is formed on the bottom wall of the installation groove, a first through hole is formed on the connecting protrusion, a second through hole corresponding to the first through hole is formed on the fixing plate, and a fixing member passes through the first through hole and the second through hole to connect the fixing plate to the bottom wall of the installation groove.

[0013] According to some embodiments of the present utility model, at least part of the edge of the bracket is recessed inward to form a first avoidance notch, and the first avoidance notch is adapted to avoid the connecting protrusion.

[0014] According to some embodiments of the present utility model, at least part of the edge of the flow dividing plate forms a second avoidance notch, the projection of the second avoidance notch in the thickness direction of the cover plate body partially coincides with the projection of the first through hole in the thickness direction of the cover plate body, and the second avoidance notch is adapted to avoid the fixing member.

[0015] According to some embodiments of the present utility model, the cover plate assembly for the battery housing further includes: a pole column, the pole column is arranged on the cover plate body and is located on at least one side of the communication port in the length direction of the cover plate body.

[0016] According to some embodiments of the present utility model, the minimum distance between the edge of the flow dividing plate in the length direction of the cover plate body and the pole column is a, and it satisfies: 0.5mm ≤ a ≤ 20mm; the minimum distance between the edge of the flow dividing plate in the width direction of the cover plate body and the edge of the cover plate body in the width direction is b, and it satisfies: 0.5mm ≤ b ≤ 5mm; the thickness of the flow dividing plate is d and it satisfies: 1mm ≤ d ≤ 10mm.

[0017] According to some embodiments of the present utility model, the flow dividing plate includes: a plate body, and through holes communicating with the communication ports are formed in the plate body; reinforcing ribs, both ends of the reinforcing ribs are respectively connected to the inner walls of the plate body where the through holes are formed, and the reinforcing ribs are configured in plurality, and a flow dividing hole is defined between two adjacent reinforcing ribs.

[0018] According to some embodiments of the present utility model, the diameter of the through hole is D, and it satisfies: 1 mm ≤ D ≤ 5 mm.

[0019] According to some embodiments of the present utility model, the cover plate assembly for the battery housing further includes an insulating coating, and the insulating coating is disposed on a side of the cover plate body facing away from the flow dividing plate.

[0020] According to some embodiments of the present utility model, the cover plate assembly for the battery housing further includes: a sealing ring, the sealing ring is configured as a flexible member and a through opening is formed inside, the through opening is adapted to receive the flow dividing plate, and the sealing ring is received in the mounting groove and is adapted to be in interference fit with the side wall of the mounting groove.

[0021] The battery housing according to the second aspect embodiment of the present utility model will be briefly described below.

[0022] The battery housing according to the present utility model includes the cover plate assembly for the battery housing according to any one of the above embodiments. Since the battery housing according to the present utility model is provided with the cover plate assembly for the battery housing of the above embodiments, the integration degree of the battery housing is higher.

[0023] The battery according to the third aspect embodiment of the present utility model will be briefly described below.

[0024] The battery according to the present utility model includes the battery housing according to the above embodiments. Since the battery according to the present utility model is provided with the battery housing of the above embodiments, the safety performance of the battery is better.

[0025] The electrical device according to the fourth aspect embodiment of the present utility model will be briefly described below.

[0026] The electrical device according to the present utility model includes the battery according to the above embodiments. Since the electrical device according to the present utility model is provided with the battery of the above embodiments, the electrical device is safe to use.

[0027] In summary, for the cover plate assembly for a battery case designed according to the present utility model, a flow dividing plate and a fixing plate are provided at the communication port, which has functions such as liquid injection, liquid supplement, exhaust, and heat dissipation. It can improve the overall integration of the battery case, increase the injection space of the electrolyte while ensuring the exhaust and heat dissipation effects, enable the battery case to exhaust and dissipate heat in a timely, rapid, and effective manner, avoid further failure of the battery core, and improve the safety performance of the battery.

[0028] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a schematic diagram of the overall structure of a battery case according to an embodiment of the present utility model.

[0031] Figure 2 is a schematic diagram of the structure of a cover plate assembly according to an embodiment of the present utility model.

[0032] Figure 3 is an exploded view of the cover plate assembly according to an embodiment of the present utility model.

[0033] REFERENCE SIGNS:

[0034] 1000, battery case; 1, cover plate assembly;

[0035] 10, cover plate body; 10a, communication port; 10b, mounting groove; 10c, first through hole; 11, connecting protrusion;

[0036] 20, flow dividing plate; 20a, flow dividing hole; 20b, second avoidance notch;

[0037] 30, fixing plate; 30a, second through hole;

[0038] 40, bracket; 40b, first avoidance notch; 50, fixing member; 60, pole; 70, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0042] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact of the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0044] In the related art, an explosion-proof valve is provided on the battery shell to exhaust and dissipate air and heat when the battery cell thermally runs away. The battery shell is also provided with an injection hole for injecting electrolyte into the shell. In some existing technologies, two poles are penetrated through the shell, and the explosion-proof valve and the injection hole are provided between the two poles. The area of the explosion-proof valve is insufficient, the exhaust and heat dissipation effect is limited, and the aperture of the injection hole is also limited, so that the injection space of the electrolyte is limited. In addition, the impact force on the battery cell when the electrolyte is injected is relatively large, which will cause the diaphragm, pole piece and other structures of the battery cell to deform and be damaged.

[0045] Reference below Figures 1 - 3 A cover plate assembly 1 for a battery housing according to an embodiment of the present utility model is described.

[0046] like Figures 1 - 3 As shown, the cover plate assembly 1 for the battery housing according to the utility model includes: a cover plate body 10, a diverter plate 20 and a fixing plate 30, the cover plate body 10 is provided with a connecting port 10a in the thickness direction; the diverter plate 20 is provided on the cover plate body 10 and covers the connecting port 10a, and at least one diverter hole 20a is provided on the diverter plate 20; the fixing plate 30 is provided on the side of the diverter plate 20 away from the connecting port 10a, and the fixing plate 30 is fixedly connected to the cover plate body 10 and is suitable for deformation after reaching a preset temperature. Specifically, the cover plate assembly 1 is used for a battery housing 1000, and a battery cell accommodating cavity is formed inside the battery housing 1000, and the battery cell accommodating cavity is suitable for accommodating a battery cell, and the electrolyte can be injected into the battery cell accommodating cavity through the connecting port 10a of the cover plate assembly 1.

[0047] Here, the electrolyte is generally injected at negative pressure. In order to reduce the impact force of the electrolyte on the battery cell when it is injected, a diverter plate 20 is set at the connecting port 10a of the cover body 10. When injection is required, the electrolyte first contacts the diverter plate 20, and then flows to the connecting port 10a through the diverter hole 20a. The diverter plate 20 can slow down the impact force of the electrolyte, thereby reducing the impact force of the electrolyte on the battery cell, and when the diverter hole 20a is configured as multiple, the multiple diverter holes 20a can divert the electrolyte into multiple streams, so that the electrolyte can be evenly dispersed into the battery cell accommodating cavity to fully and evenly soak the battery cell.

[0048] After the electrolyte injection is completed, the fixing plate 30 is fixedly connected to the cover body 10 to fix the diverter plate 20 and seal the connecting port 10a. When the electrolyte needs to be supplemented, the fixing plate 30 can be disassembled to inject the electrolyte in time to improve the life of the battery. Since the fixing plate 30 can be deformed after reaching a preset temperature, the fixing plate 30 can be used as an explosion-proof structure of the battery. When the battery cell is thermally runaway, the fixing plate 30 is heated. After reaching a preset temperature, the fixing plate 30 is deformed to connect the connecting port 10a to the outside of the battery housing 1000, and the battery can exhaust gas and heat through the connecting port 10a.

[0049] The cover plate assembly 1 for a battery housing designed according to the present utility model integrates the explosion-proof structure and the liquid injection structure on the battery housing 1000, improving the overall integration. Its communication port 10a serves functions such as liquid injection, liquid replenishment, exhaust, and heat dissipation, which can ensure the layout area of the explosion-proof structure and the liquid injection structure, increase the electrolyte injection space while ensuring the exhaust and heat dissipation effects, and can exhaust and dissipate heat timely, quickly, and effectively, avoiding further failure of the battery cells and improving the safety performance of the battery.

[0050] In some embodiments, the fixing plate 30 is made of a material that will deform when reaching a preset temperature. For example, the fixing plate 30 can be made of a plastic material (such as one material or a composite material of PE, PP, PET, PC, PVC, PS, etc.) to achieve deformation when reaching the preset temperature, enabling the battery to exhaust and dissipate heat smoothly and achieving the explosion-proof effect.

[0051] In some embodiments, the shunt plate 20 is also made of a material that will deform when reaching a preset temperature. When the battery cells heat up and reach the preset temperature, the shunt plate 20 deforms to open at least part of the communication port 10a, enabling the battery to exhaust and dissipate heat through the communication port 10a. Both the shunt plate 20 and the fixing plate 30 can undergo thermal deformation, which can improve the overall heat dissipation effect of the battery.

[0052] In some embodiments, the shunt plate 20 can form the shunt holes 20a in a hollowed-out manner or in a through-hole manner, and the hollowed-out manner is preferred. The setting of the shunt plate 20 can reduce the impact force of the electrolyte on the battery cells during liquid injection and avoid damage to the battery cells.

[0053] In some embodiments, the shunt holes 20a on the shunt plate 20 can be continuously arranged to form through-holes or arranged at intervals. The center points of the openings can be on a straight line or arranged in a curved shape, which can be designed according to actual needs. And the shunt holes 20a can be in regular shapes such as square, rectangle, ellipse, circle, polygon, etc., or in other irregular shapes, which can be designed according to actual needs and are not limited here.

[0054] Here, for the battery housing 1000 using the cover plate assembly 1 designed according to the present utility model, the liquid injection hole welding process in the production process can be cancelled, saving process time and the procurement of welding equipment in the production equipment, and reducing production costs.

[0055] In some embodiments, the cover plate assembly 1 can have the pole posts 60 protruding from the top or from both sides. For a battery using this cover plate assembly 1, when the battery cells undergo thermal runaway, it has the ability to discharge heat and gas faster, avoiding the phenomenon that the battery housing 1000 at the large surface of the battery cells bears excessive pressure and gets damaged.

[0056] According to some embodiments of the present utility model, such asFigures 1 - 3 As shown, an installation groove 10b is formed on one side surface of the cover plate body 10, and a communication port 10a is formed on a part of the bottom wall of the installation groove 10b. The flow distribution plate 20 is received in the installation groove 10b. The installation groove 10b can be used to position the flow distribution plate 20 to prevent the flow distribution plate 20 from moving. In some embodiments, the flow distribution plate 20 is received in the installation groove 10b and is in interference fit with the side wall of the installation groove 10b, so that the flow distribution plate 20 will not move relative to the cover plate body 10 during liquid injection, ensuring the structural stability of the cover plate assembly 1 and the efficiency of liquid injection during liquid injection.

[0057] Here, the size of the flow distribution plate 20 can be adjusted accordingly according to the size of the installation groove 10b. The flow distribution plate 20 and the installation groove 10b are in interference fit, reducing the gap between the bottom wall and the side wall of the flow distribution plate 20 and the installation groove 10b, so that the electrolyte can only flow from the flow distribution holes 20a towards the communication port 10a.

[0058] In addition, the flow distribution plate 20 and the installation groove 10b are detachably fitted to facilitate the disassembly, assembly and maintenance of the battery cell.

[0059] According to some embodiments of the present invention, the cover plate assembly 1 for the battery housing further includes a sealing ring 70. The sealing ring 70 is configured as a flexible member and has a through hole formed therein. The through hole is adapted to receive the flow distribution plate 20. The sealing ring 70 is received in the installation groove 10b and is adapted to be in interference fit with the side wall of the installation groove 10b. The sealing ring 70 makes an interference fit between the flow distribution plate 20 and the installation groove 10b, and can seal the gap between the bottom wall and the side wall of the flow distribution plate 20 and the installation groove 10b, so that the electrolyte can only flow from the flow distribution holes 20a towards the communication port 10a, enabling the injected electrolyte to flow into the battery cell accommodation cavity through the flow distribution plate 20, fully decelerating the electrolyte, and enhancing the protection effect on the battery cell.

[0060] According to some embodiments of the present invention, as Figures 1 - 3 shown, the fixing plate 30 is spaced from the bottom wall of the installation groove 10b to form a gap. The flow distribution plate 20 is disposed in the gap. The projection of the flow distribution plate 20 in the thickness direction is located inside the projection of the fixing plate 30 in the thickness direction. The fixing plate 30 is connected to the bottom wall of the installation groove 10b. Specifically, the fixing plate 30 is fixedly connected to the bottom wall of the installation groove 10b, which can fix the flow distribution plate 20 in the installation groove 10b and simultaneously seal the flow distribution holes 20a, realizing the fixation of the flow distribution plate 20 and the sealing of the flow distribution holes 20a. Here, the fixing plate 30 is detachably connected to the bottom wall of the installation groove 10b. First, the flow distribution plate 20 and the installation groove 10b can be in interference fit, and then the fixing plate 30 can be fixed to the cover plate body 10 to form an integrated fastening.

[0061] In some embodiments, the fixing plate 30 and the bottom wall of the mounting groove 10b can be locked by means such as bolts, buckles, interference fits, etc., and can be repeatedly disassembled to facilitate timely replenishment of liquid to the communication port 10a.

[0062] In some embodiments, the fixing plate 30 and the bottom wall of the mounting groove 10b can be connected by a non-stick sealant, which can achieve the sealing effect between the fixing plate 30 and the mounting groove 10b and realize the function of repeated disassembly.

[0063] According to some embodiments of the present invention, as Figure 3 shown, the cover plate assembly 1 for the battery housing further includes a bracket 40. At least part of the bracket 40 is disposed in the communication port 10a and fits against the inner wall surface of the communication port 10a. The bracket 40 abuts against the surface of the flow dividing plate 20 facing the communication port 10a. In some embodiments, the bracket 40 is detachably connected to the inner wall surface of the communication port 10a to support the flow dividing plate 20 and prevent the flow dividing plate 20 from collapsing and deforming towards the communication port 10a.

[0064] According to some embodiments of the present invention, as Figure 3 shown, the bottom wall of the mounting groove 10b is formed with a connecting protrusion 11 protruding towards the communication port 10a. The connecting protrusion 11 is provided with a first through hole 10c. The fixing plate 30 is formed with a second through hole 30a corresponding to the first through hole 10c. The fixing member 50 passes through the first through hole 10c and the second through hole 30a to connect the fixing plate 30 to the bottom wall of the mounting groove 10b. Here, the connecting protrusion 11 is provided on the bottom wall of the mounting groove 10b so that the fixing plate 30 can cooperate with the bottom wall of the mounting groove 10b, and the fixing plate 30 and the cover plate body 10 are detachably connected by the fixing member 50, which facilitates the disassembly and assembly operation of the fixing plate 30.

[0065] According to some embodiments of the present invention, as Figure 3 shown, at least part of the edge of the bracket 40 is recessed inward to form a first avoiding notch 40b. The first avoiding notch 40b is adapted to avoid the connecting protrusion 11. At this time, the outer peripheral surface of the bracket 40 can be closely attached to the inner wall surface of the communication port 10a, improving the overall sealing performance of the battery housing 1000.

[0066] According to some embodiments of the present invention, as Figure 3 shown, at least part of the edge of the flow dividing plate 20 is formed with a second avoiding notch 20b. The projection of the second avoiding notch 20b in the thickness direction of the cover plate body 10 partially coincides with the projection of the first through hole 10c in the thickness direction of the cover plate body 10. The second avoiding notch 20b is adapted to avoid the fixing member 50. At this time, the flow dividing plate 20 is located between the fixing plate 30 and the cover plate body 10, and the fixing member 50 fixedly connects the fixing plate 30 to the cover plate body 10, which can achieve the fixation of the flow dividing plate 20 and the sealing of the flow dividing holes 20a.

[0067] According to some embodiments of the present utility model, as Figures 1 - 3 shown, the cover plate assembly 1 for the battery housing further includes a pole column 60, the pole column 60 is disposed on the cover plate body 10 and is located on at least one side of the communication port 10a in the length direction of the cover plate body 10. In some embodiments, there are two pole columns 60 and they are respectively located at both ends of the cover plate body 10 in the length direction, and the communication port 10a is opened on the cover plate body 10 and is located between the two pole columns 60. At this time, the area of the communication port 10a is larger, that is, the areas of the explosion-proof structure and the liquid injection structure of the battery housing 1000 are larger, which is convenient for exhausting gas and heat timely, quickly and effectively, and can facilitate liquid injection and reduce the liquid injection pressure.

[0068] According to some embodiments of the present utility model, as Figure 2 shown, the minimum distance between the edge of the flow dividing plate 20 in the length direction of the cover plate body 10 and the pole column 60 is a, and it satisfies: 0.5 mm ≤ a ≤ 20 mm. It can be understood that in order to reduce the volume of the battery housing 1000 to ensure the energy density of the battery, the distance between the flow dividing plate 20 and the pole column 60 should not be too large, and in order to facilitate the arrangement of the flow dividing plate 20 and the pole column 60, the distance between the flow dividing plate 20 and the pole column 60 should not be too small. Therefore, the distance a between the flow dividing plate 20 and the pole column 60 should satisfy 0.5 mm ≤ a ≤ 20 mm. In some embodiments, the distance between the flow dividing plate 20 and the pole column 60 can be 1 mm or 2 mm.

[0069] According to some embodiments of the present utility model, as Figure 2 shown, the minimum distance between the edge of the flow dividing plate 20 in the width direction of the cover plate body 10 and the edge of the cover plate body 10 in the width direction is b, and it satisfies: 0.5 mm ≤ b ≤ 5 mm. It can be understood that in order to reduce the volume of the battery housing 1000 to ensure the energy density of the battery, the distance between the flow dividing plate 20 and the edge of the cover plate body 10 should not be too large, and in order to ensure the structural strength of the cover plate body 10, the distance between the flow dividing plate 20 and the edge of the cover plate body 10 should not be too small. Therefore, the distance b between the flow dividing plate 20 and the edge of the cover plate body 10 should satisfy 0.5 mm ≤ b ≤ 5 mm. In some embodiments, the distance between the flow dividing plate 20 and the edge of the cover plate body 10 can be 1 mm or 2 mm.

[0070] According to some embodiments of the present utility model, the thickness of the flow dividing plate 20 is d and it satisfies: 1 mm ≤ d ≤ 5 mm. It can be understood that in order to reduce the weight of the cover plate body 10, the thickness of the flow dividing plate 20 should not be too large, and in order to ensure the structural strength of the flow dividing plate 20, the thickness of the flow dividing plate 20 should not be too small. Therefore, the thickness d of the flow dividing plate 20 should satisfy 1 mm ≤ d ≤ 5 mm. In some embodiments, the thickness of the flow dividing plate 20 can be 3 mm.

[0071] According to some embodiments of the present utility model, the flow dividing plate 20 includes a plate body and reinforcing ribs. The plate body is formed with a through hole communicating with the communication port 10a; both ends of the reinforcing ribs are respectively connected to the inner wall of the plate body where the through hole is formed. The reinforcing ribs are configured in plurality, and a flow dividing hole 20a is defined between two adjacent reinforcing ribs. In some embodiments, the through hole formed by hollowing out on the plate body can be a regular shape such as an oval, a circle, a square, etc., or an irregular shape such as a rhombus, a pentagon, or other irregular shapes, which can be designed according to actual requirements and are not limited herein. To enhance the structural strength of the plate body, a plurality of reinforcing ribs are arranged in the through hole, and the flow dividing hole 20a is defined between adjacent reinforcing ribs. At this time, the flow dividing plate 20 has a mesh structure, and the electrolyte flows into the communication port 10a through the plurality of flow dividing holes 20a on the flow dividing plate 20.

[0072] In some embodiments, the diameter of the reinforcing ribs can be designed according to the thickness of the cover plate body 10 or the flow dividing plate 20. The diameter of the reinforcing ribs can be 0.2 mm.

[0073] According to some embodiments of the present utility model, the diameter of the through hole is D, and it satisfies: 1 mm ≤ D ≤ 10 mm. It can be understood that to ensure the structural strength of the flow dividing plate 20, the diameter of the through hole should not be too large, and to ensure the flow area of the electrolyte, the diameter of the through hole should not be too small. Therefore, the diameter D of the through hole should satisfy 1 mm ≤ D ≤ 10 mm. In some embodiments, the diameter of the through hole can be 8 mm.

[0074] According to some embodiments of the present utility model, the cover plate assembly 1 for the battery housing further includes an insulating coating. The insulating coating is disposed on the side of the cover plate body 10 facing away from the flow dividing plate 20, which can play a role in insulating and withstanding voltage. Here, the application of the lower plastic part is cancelled in the cover plate assembly 1 designed according to the present utility model. By spraying an insulating material at the bottom of the cover plate body 10, the insulation treatment between the cover plate body 10 and the battery cell is realized, reducing the components of the cover plate assembly 1, thereby reducing the weight and cost of the cover plate assembly 1.

[0075] The battery housing 1000 according to the present utility model will be briefly described below.

[0076] The battery housing 1000 according to the present utility model includes the cover plate assembly 1 for the battery housing described in any one of the above embodiments. Since the battery housing 1000 according to the present utility model is provided with the cover plate assembly 1 for the battery housing in the above embodiments, the integration degree of the battery housing 1000 is higher.

[0077] The battery according to the present utility model will be briefly described below.

[0078] The battery according to the present utility model includes the battery housing 1000 described in the above embodiments. Since the battery according to the present utility model is provided with the battery housing 1000 of the above embodiments, the safety performance of the battery is better.

[0079] The electrical equipment according to the present utility model will be briefly described below.

[0080] The electrical equipment according to the present utility model includes the battery described in the above embodiments. Since the electrical equipment according to the present utility model is provided with the battery of the above embodiments, the electrical equipment is safe to use.

[0081] In summary, for the cover plate assembly 1 for a battery housing designed according to the present utility model, a flow dividing plate 20 and a fixing plate 30 are provided at the communication port 10a, which has functions such as liquid injection, liquid replenishment, exhaust, and heat dissipation. It can improve the overall integration of the battery housing 1000, increase the injection space of the electrolyte while ensuring the exhaust and heat dissipation effects, enable the battery housing 1000 to exhaust and dissipate heat in a timely, rapid, and effective manner, prevent further failure of the battery cells, and improve the safety performance of the battery.

[0082] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0083] Although the embodiments of the present utility model have been shown and described above, changes, modifications, substitutions, and variations can be made to the above embodiments.

Claims

1. A cover plate assembly (1) for a battery housing, characterized in that, include: A cover plate body (10), wherein the cover plate body (10) is provided with a communication opening (10a) penetrating in a thickness direction; a flow dividing plate (20), the flow dividing plate (20) being arranged on the cover plate body (10) and covering the communication port (10a), and the flow dividing plate (20) being provided with at least one flow dividing hole (20a); A fixing plate (30), the fixing plate (30) being arranged on a side of the diverter plate (20) away from the connecting port (10a), the fixing plate (30) being fixedly connected to the cover plate body (10) and being adapted to deform after reaching a preset temperature.

2. The cover plate assembly (1) for a battery housing according to claim 1, characterized in that, A mounting groove (10b) is formed on one side surface of the cover plate body (10), the communicating port (10a) is formed on a portion of the bottom wall of the mounting groove (10b), and the diverter plate (20) is accommodated in the mounting groove (10b).

3. The cover plate assembly (1) for a battery housing according to claim 2, characterized in that, The fixing plate (30) and the bottom wall of the mounting groove (10b) are spaced apart to form a gap, the diverter plate (20) is arranged in the gap, the projection of the diverter plate (20) in the thickness direction is located inside the projection of the fixing plate (30) in the thickness direction, and the fixing plate (30) is connected to the bottom wall of the mounting groove (10b).

4. The cover plate assembly (1) for a battery housing according to claim 3, characterized in that, Also includes: A bracket (40), at least a portion of which is disposed in the communication port (10a) and is in contact with an inner wall surface of the communication port (10a), and the bracket (40) abuts against a surface of the diverter plate (20) facing the communication port (10a).

5. The cover plate assembly (1) for a battery housing according to claim 4, characterized in that, The bottom wall of the mounting groove (10b) is formed with a connecting protrusion (11) protruding toward the connecting port (10a), and the connecting protrusion (11) is provided with a first through hole (10c). The fixing plate (30) is formed with a second through hole (30a) corresponding to the first through hole (10c), and the fixing member (50) is penetrated through the first through hole (10c) and the second through hole (30a) to connect the fixing plate (30) with the bottom wall of the mounting groove (10b).

6. The cover plate assembly (1) for a battery housing according to claim 5, characterized in that, At least part of the edge of the bracket (40) is recessed inward to form a first avoidance gap (40b), and the first avoidance gap (40b) is suitable for avoiding the connecting protrusion (11).

7. The cover plate assembly (1) for a battery housing according to claim 5, characterized in that, A second avoidance notch (20b) is formed on at least part of the edge of the diverter plate (20), the projection of the second avoidance notch (20b) in the thickness direction of the cover plate body (10) partially overlaps with the projection of the first through hole (10c) in the thickness direction of the cover plate body (10), and the second avoidance notch (20b) is suitable for avoiding the fixing member (50).

8. The cover plate assembly (1) for a battery housing according to claim 1, characterized in that Also includes: A pole (60) is arranged on the cover plate body (10) and is located on at least one side of the communication opening (10a) in the length direction of the cover plate body (10).

9. The cover plate assembly (1) for a battery housing according to claim 8, characterized in that, The minimum distance between the edge of the diverter plate (20) in the length direction of the cover plate body (10) and the pole (60) is a, and satisfies: 0.5 mm ≤ a ≤ 20 mm; The minimum distance between the edge of the flow dividing plate (20) in the width direction of the cover plate body (10) and the edge of the cover plate body (10) in the width direction is b, and it satisfies: 0.5 mm ≤ b ≤ 5 mm; The thickness of the flow dividing plate (20) is d and it satisfies: 1 mm ≤ d ≤ 10 mm.

10. The cover plate assembly (1) for a battery housing according to claim 1, characterized in that, The flow dividing plate (20) includes: A plate body, and a through hole communicating with the communication port (10a) is formed in the plate body; Reinforcing ribs, both ends of the reinforcing ribs are respectively connected to the inner wall of the plate body where the through hole is formed, the reinforcing ribs are configured in plurality, and a flow dividing hole (20a) is defined between two adjacent reinforcing ribs.

11. The cover plate assembly (1) for a battery housing according to claim 10, characterized in that, The diameter of the through hole is D, and it satisfies: 1 mm ≤ D ≤ 5 mm.

12. The cover plate assembly (1) for a battery housing according to claim 1, characterized in that, It further includes an insulating coating, and the insulating coating is provided on the side of the cover plate body (10) facing away from the flow dividing plate (20).

13. The cover plate assembly (1) for a battery housing according to claim 2, characterized in that, It further includes: A sealing ring (70), the sealing ring (70) is configured as a flexible member and a through opening is formed inside, the through opening is adapted to receive the flow dividing plate (20), and the sealing ring (70) is received in the mounting groove (10b) and is adapted to be in interference fit with the side wall of the mounting groove (10b).

14. A battery housing (1000), characterized in that, It includes a cover plate assembly (1) for a battery housing according to any one of claims 1 - 13.

15. A battery, characterized in that, It includes a battery housing (1000) according to claim 14.

16. An electrical device, characterized in that, It includes a battery according to claim 15.

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