Bottom plate, bottom plate assembly, energy storage device and electric equipment

Abstract

A bottom plate, a bottom plate assembly, an energy storage device and electric equipment, the bottom plate is used for the bottom plate assembly, the bottom plate comprises a plate body, a first sinking table and a second sinking table, the plate body comprises a first surface and a second surface which are opposite to each other, and the second surface is used for facing a pole core; the first sinking table is connected with the plate body, the first surface extends to the first sinking table to form a first cavity, a through pole hole is formed in the bottom wall of the first cavity, and the first cavity is used for accommodating a pole arranged in the pole hole; the second sinking table is connected with the plate body, the second sinking table and the first sinking table are arranged in a spaced mode, the first surface extends to the second sinking table to form a second cavity, a through liquid injection hole is formed in the bottom wall of the second cavity, and the second cavity is used for containing a liquid injection plug arranged in the liquid injection hole. The external space utilization rate of the battery and the internal space of the battery shell are improved, so that the energy density of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a base plate, a base plate assembly, an energy storage device and electrical equipment. Background Art

[0002] At present, the pole of the battery can realize the connection between the electric energy generated inside the battery and the external circuit, and the injection plug can seal the injection hole of the battery, both of which are of great significance to the battery. In the prior art, the pole and the injection plug are installed on the outer surface of the bottom plate, and the pole and the injection plug are protruding from the outer surface of the bottom plate, thereby limiting the space above the battery, reducing the utilization rate of the external space of the battery and the internal space of the battery shell, resulting in a decrease in the energy density of the battery. Utility Model Content

[0003] The utility model aims to provide a base plate, a base plate assembly, an energy storage device and an electrical device, so as to solve the problem that the battery energy density is low due to the low utilization of the battery external space.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] In the first aspect, the utility model provides a bottom plate, comprising: a plate body, comprising a first surface and a second surface opposite to each other, the second surface is used to face the pole core; a first sinker, connected to the plate body, the first surface extends to the first sinker to form a first cavity, the bottom wall of the first cavity is provided with a through pole hole, the first cavity is used to accommodate the pole arranged in the pole hole; a second sinker, connected to the plate body, the second sinker is spaced apart from the first sinker, the first surface extends to the second sinker to form a second cavity, the bottom wall of the second cavity is provided with a through injection hole, the second cavity is used to accommodate the injection plug arranged in the injection hole.

[0006] In one embodiment, the plate body, the first sinking platform and the second sinking platform are an integrated structure.

[0007] In one embodiment, the first recessed platform protrudes from the second surface, and / or the second recessed platform protrudes from the second surface.

[0008] In one embodiment, the first sunken platform and the second sunken platform are arranged near a first edge of the plate body and are spaced apart along the first edge.

[0009] In one embodiment, the first sink is in a rectangular shape, and / or the second sink is in a circular shape, and the injection hole is a circular hole.

[0010] In one embodiment, the depth of the first cavity is greater than the depth of the second cavity.

[0011] In one implementation, the depth of the first cavity is H1, satisfying: 0.8 mm ≤ H1 ≤ 1.2 mm.

[0012] In one implementation, the length of the first cavity is A1, and the width of the first cavity is A2, satisfying: 13mm≤A1≤15mm, 5mm≤A2≤7mm.

[0013] In one implementation, the depth of the second cavity is H2, satisfying: 0.5 mm ≤ H2 ≤ 0.7 mm.

[0014] In one embodiment, the diameter of the second cavity is B, satisfying: 3.0 mm ≤ B ≤ 4.0 mm.

[0015] In one implementation, the distance between the center of the first sinker and the center of the second sinker is C, which satisfies: 3.0 mm ≤ C ≤ 10.0 mm.

[0016] In one embodiment, the base plate is made of steel.

[0017] In one embodiment, a pressure relief groove is provided on the first surface or the second surface, the depth of the pressure relief groove is D1, and the thickness of the plate body is D2, satisfying: D1<D2.

[0018] In a second aspect, the utility model further provides a base plate assembly, comprising a pole, a liquid injection plug and a base plate as described in any one of the various embodiments of the first aspect, wherein the pole is inserted into the pole hole, and the liquid injection plug is inserted into the liquid injection hole.

[0019] In one embodiment, the bottom plate assembly further includes a sealing cover and a liquid injection plug, the sealing cover encloses a receiving space, and an end surface of the sealing cover close to the first surface is located between the first surface and the bottom wall of the second cavity.

[0020] In one embodiment, the base plate assembly also includes a first insulating member, the pole includes a first plate portion and a second rod portion connected to each other, the first insulating member includes a second plate portion and a barrel portion connected to each other, the second rod portion extends into the barrel portion, the barrel portion extends into the pole hole, and the first plate portion abuts against the second plate portion.

[0021] In the third aspect, the utility model also provides an energy storage device, comprising a middle frame, a pole core and a base plate assembly as described in any of the various embodiments of the second aspect, wherein the middle frame is connected to the base plate assembly and encloses a accommodating cavity, the accommodating cavity is connected to the injection hole and the pole hole, and the accommodating cavity is used to accommodate the pole core.

[0022] In a fourth aspect, the utility model further provides an electrical equipment, comprising an electrical device and an energy storage device as described in the third aspect, wherein the energy storage device is used to supply power to the electrical device.

[0023] By setting a plate body, a first sinker and a second sinker, the plate body includes a first surface and a second surface opposite to each other, and the second surface is used to face the pole core; the first sinker is connected to the plate body, and the first surface extends to the first sinker to form a first cavity, and the bottom wall of the first cavity is provided with a through pole hole, and the first cavity is used to accommodate the pole arranged in the pole hole; the second sinker is connected to the plate body, and the second sinker is spaced apart from the first sinker, and the first surface extends to the second sinker to form a second cavity, and the bottom wall of the second cavity is provided with a through injection hole, and the second cavity is used to accommodate the injection plug arranged in the injection hole. Since the first cavity and the second cavity accommodate the pole and the injection plug, the pole and the injection plug will not protrude from the first surface and will not affect the external space of the battery. The utility model improves the utilization rate of the external space of the battery and the internal space of the battery shell, thereby improving the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is an exploded structural diagram of a base plate assembly of an embodiment;

[0026] Figure 2 is a schematic diagram of the assembly of a base plate assembly of an embodiment;

[0027] Figure 3 is a Figure 2 Section along AA;

[0028] Figure 4 is a first perspective view of an energy storage device according to an embodiment;

[0029] Figure 5 is a second perspective view of an energy storage device according to an embodiment;

[0030] Figure 6 is a first perspective view of a base plate of an embodiment;

[0031] Figure 7 FIG. 1 is a second perspective view of a base plate of an embodiment.

[0032] Description of reference numerals:

[0033] 10-bottom plate, 11-plate body, 12-first surface, 13-second surface, 14-first sinker, 15-first cavity, 16-pole hole, 17-pole, 171-first plate portion, 172-second rod portion, 18-second sinker, 19-second cavity, 20-liquid injection hole, 21-liquid injection plug, 211-head, 212-first rod portion, 22-sealing cover, 23-first edge, 24-accommodating space, 25-first insulating member, 251-second plate portion, 252-barrel portion, 26-middle frame, 27-pole core, 28-top plate, 29-accommodating cavity, 30-pole ear, 31-pressure relief groove, 32-second insulating member, 321-third plate portion, 322-first hole, 33-lead-out piece, 331-fourth plate portion, 332-second hole, H1-depth of the first cavity, H2-depth of the second cavity. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0036] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0037] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] The present invention provides a bottom plate 10, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6, including a plate body 11, a first surface 12, a second surface 13, a first sink 14, a first cavity 15, a pole hole 16, a pole 17, a second sink 18, a second cavity 19, a liquid injection hole 20 and a liquid injection plug 21.

[0039] The plate body 11 includes a first surface 12 and a second surface 13 facing each other, and the second surface 13 is used to face the pole core 27. Specifically, the thickness of the plate body 11 is the distance between the first surface 12 and the second surface 13. Optionally, the distance between the first surface 12 and the second surface 13 ranges from 15 microns to 500 microns. Optionally, the distance between the first surface 12 and the second surface 13 can be, but not limited to, 15 microns, 20 microns, 100 microns, 300 microns, and 500 microns, etc. Optionally, the shape of the plate body 11 can be polygonal, circular, elliptical, and anisotropic, etc. Optionally, the shape of the plate body 11 can be, but not limited to, square, circular, hexagonal, and anisotropic (such as L-shaped) structures.

[0040] The first sink 14 is connected to the plate body 11, and the first surface 12 extends to the first sink 14 to form a first cavity 15. The bottom wall of the first cavity 15 is provided with a through pole hole 16, and the first cavity 15 is used to accommodate a pole 17 arranged in the pole hole 16. Optionally, the end surface of the pole 17 close to the first surface 12 is located between the first surface 12 and the bottom wall of the first cavity 15. Specifically, the first cavity 15 hides the pole 17, thereby improving the utilization rate of the external space of the battery, reducing the influence of the pole 17 on the battery shape design and thickness design, so that the battery can be made thin to the greatest extent.

[0041] Optionally, the shape of the pole hole 16 may be polygonal, circular, elliptical, irregular, etc. Optionally, the shape of the pole hole 16 may be, but is not limited to, quadrilateral, hexagon, octagon, circular, elliptical, irregular, etc.

[0042] The second sink 18 is connected to the plate body 11, and the second sink 18 is spaced apart from the first sink 14. The first surface 12 extends to the second sink 18 to form a second cavity 19. The bottom wall of the second cavity 19 is provided with a through injection hole 20. The second cavity 19 is used to accommodate an injection plug 21 disposed in the injection hole 20. Optionally, the end surface of the injection plug 21 close to the first surface 12 is located between the first surface 12 and the bottom wall of the second cavity 19. Specifically, the second cavity 19 hides the injection plug 21, thereby improving the utilization rate of the external space of the battery and reducing the influence of the injection plug 21 on the battery shape design and thickness design.

[0043] Optionally, the shape of the injection hole 20 may be polygonal, circular, elliptical, irregular, etc. Optionally, the shape of the injection hole 20 may be, but is not limited to, quadrilateral, hexagon, octagon, circular, elliptical, irregular, etc.

[0044] By setting the plate body 11, the first sinking platform 14 and the second sinking platform 18, the plate body 11 includes a first surface 12 and a second surface 13 opposite to each other, and the second surface 13 is used to face the pole core 27; the first sinking platform 14 is connected to the plate body 11, and the first surface 12 extends to the first sinking platform 14 to form a first cavity 15, and the bottom wall of the first cavity 15 is provided with a through pole hole 16, and the first cavity 15 is used to accommodate the pole 17 set in the pole hole 16; the second sinking platform 18 is connected to the plate body 11, and the second sinking platform 18 is spaced apart from the first sinking platform 14 The first surface 12 is arranged to extend to the second sink 18 to form a second cavity 19, and a through injection hole 20 is provided on the bottom wall of the second cavity 19. The second cavity 19 is used to accommodate an injection plug 21 arranged in the injection hole 20. Since the first cavity 15 and the second cavity 19 accommodate the pole 17 and the injection plug 21, the pole 17 and the injection plug 21 will not protrude from the first surface 12, and will not affect the external space of the battery. The utility model improves the utilization rate of the external space of the battery and the internal space of the battery shell, thereby improving the energy density of the battery.

[0045] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The plate body 11, the first sinking platform 14 and the second sinking platform 18 are an integrated structure.

[0046] Optionally, the first sinker 14 and the second sinker 18 are structures punched out on the plate body 11. Optionally, the plate body 11, the first sinker 14 and the second sinker 18 are non-integrated structures and are connected together by welding.

[0047] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The first depression 14 protrudes from the second surface 13 , and / or the second depression 18 protrudes from the second surface 13 .

[0048] Specifically, the distance that the first depression 14 protrudes from the second surface 13 is equal to the depth of the first cavity 15 .

[0049] Specifically, the distance that the second depression 18 protrudes from the second surface 13 is the depth of the second cavity 19 .

[0050] In one embodiment, the first sunken platform 14 and the second sunken platform 18 are disposed near the first edge 23 of the plate body 11 and are spaced apart along the first edge 23 .

[0051] Specifically, the first sinking platform 14 and the second sinking platform 18 are spaced apart from each other, so that when the electrolyte is injected into the second sinking platform 18 , the electrolyte will not affect the first sinking platform 14 .

[0052] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3The first sink 14 is rectangular in shape, and / or the second sink 18 is circular in shape, and the injection hole 20 is a circular hole.

[0053] Optionally, the length direction of the first sink 14 is parallel to the first edge 23 .

[0054] Optionally, the shape of the first sink 14 may also be a hexagon, an octagon, a decagon, a circle, an ellipse, an irregular shape, etc., which is not limited in the present invention.

[0055] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the axis of the second sinker 18 coincides with the axis of the circular hole.

[0056] Optionally, the shape of the second sink 18 can also be hexagonal, octagonal, decagonal, elliptical and irregular, etc., which is not limited by the present invention. Optionally, the injection hole 20 can also be a hexagonal hole, an octagonal hole, a decagonal hole, an elliptical hole and irregular, etc., which is not limited by the present invention.

[0057] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the depth of the first cavity 15 is greater than the depth of the second cavity 19.

[0058] Optionally, the depth of the first cavity 15 is H1, and the depth of the second cavity 19 is H2, satisfying: H1>H2. Optionally, H2≤1 / 2H1.

[0059] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the depth of the first cavity is H1, satisfying: 0.8mm≤H1≤1.2mm.

[0060] Optionally, the depth H1 of the first cavity may be, but is not limited to, 0.8 mm, 0.9 mm, 1.0 mm, 1.2 mm, etc.

[0061] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the length of the first cavity is A1, the width of the first cavity is A2, satisfying: 13mm≤A1≤15mm, 5mm≤A2≤7mm.

[0062] Optionally, the length A1 of the first cavity may be, but is not limited to, 13 mm, 14 mm, 15 mm, etc. Optionally, the width A2 of the first cavity may be, but is not limited to, 5 mm, 6 mm, 7 mm, etc.

[0063] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the depth of the second cavity is H2, satisfying: 0.5mm≤H2≤0.7mm.

[0064] Optionally, the depth H2 of the second cavity may be, but is not limited to, 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0065] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the diameter of the second cavity is B, satisfying: 3.0mm≤B≤4.0mm.

[0066] Optionally, the diameter B of the second cavity may be, but is not limited to, 3.0 mm, 3.2 mm, 3.5 mm, 4.0 mm, etc.

[0067] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The distance between the center of the first sinking platform 14 and the center of the second sinking platform 18 is C, which satisfies: 3.0mm≤C≤10.0mm.

[0068] Optionally, the distance C between the center of the first sinking platform 14 and the center of the second sinking platform 18 may be, but is not limited to, 3.0 mm, 4.0 mm, 5.0 mm, 10.0 mm, etc.

[0069] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the bottom plate 10 is made of steel.

[0070] Optionally, the bottom plate 10 is made of stainless steel. Specifically, the strength and toughness of steel are relatively balanced, the strength is still good after stretching and it is not easy to deform.

[0071] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 A pressure relief groove 31 is provided on the first surface 12 or the second surface 13 , the depth of the pressure relief groove 31 is D1 , and the thickness of the plate is D2 , satisfying: D1<D2.

[0072] Specifically, the pressure relief groove 31 can be completed by punching, laser etching, etc. Optionally, the depth of the pressure relief groove 31 is less than the distance between the first surface and the second surface.

[0073] Optionally, the shape of the pressure relief groove 31 can be polygonal, circular, elliptical, or anisotropic, etc. Optionally, the shape of the pressure relief groove 31 can be, but is not limited to, square, circular, hexagonal, or anisotropic (such as L-shaped), etc.

[0074] Optionally, the first surface 12 and the second surface 13 are polished, and the polishing method may be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc. Polishing the first surface 12 and the second surface 13 improves the smoothness of the first surface 12 and the second surface 13 and avoids scratching other components.

[0075] Optionally, the first surface 12 and the second surface 13 are chemically polished, using an oxidant solution, under certain conditions, to oxidize the surface of the first surface 12 and the second surface 13, and this oxide layer can gradually dissolve into the solution, and the micro-protrusions of the first surface 12 and the second surface 13 are oxidized faster and more, while the micro-concave areas are oxidized slowly and less. Similarly, the oxide layer at the protrusions diffuses more and faster than everywhere else and dissolves in the solution, so that the surfaces of the first surface 12 and the second surface 13 are gradually leveled to avoid scratching the objects to be accommodated and damaging the functional components. Using chemical polishing to process the first surface 12 and the second surface 13 can protect the thin walls of the first surface 12 and the second surface 13, avoid affecting the rigidity of the material, make the first surface 12 and the second surface 13 smooth and glossy, and also avoid scratching other parts during the installation process. This polishing method is simple to operate and has high processing efficiency.

[0076] Specifically, when an abnormal situation occurs inside the battery, such as overload, overcharge, over-discharge and overtemperature, a large amount of gas is generated inside the battery, causing the internal pressure to increase, and the pressure relief groove 31 will be activated. The bottom wall of the pressure relief groove 31 will automatically expand or bounce to release excess gas and heat, thereby keeping the internal pressure of the battery pack stable within a reasonable range and preventing dangerous accidents such as battery short circuit and explosion.

[0077] The present invention also provides a base plate 10 assembly, please refer to Figure 1 , Figure 2 and Figure 3 , including a pole 17 , a liquid injection plug 21 and the aforementioned bottom plate 10 , the pole 17 is penetrated in the pole hole 16 , and the liquid injection plug 21 is penetrated in the liquid injection hole 20 .

[0078] Optionally, the material of the bottom plate 10 can be iron alloy and aluminum alloy. Optionally, the material of the liquid injection plug 21 can be elastic rubber or elastic resin, and the present invention does not limit this. Optionally, the material of the liquid injection plug 21 can be, but is not limited to, natural rubber, silicone rubber, nitrile rubber, chloroprene rubber, fluororubber, EPDM rubber, polyurethane rubber, epichlorohydrin rubber and acrylic rubber.

[0079] In one embodiment, the base plate 10 assembly further includes a sealing cover 22 and a liquid injection plug 21 . The sealing cover 22 encloses a receiving space 24 . The end surface of the sealing cover 22 close to the first surface 12 is located between the first surface 12 and the bottom wall of the second cavity 19 .

[0080] Specifically, the liquid injection plug 21 includes a head portion 211 and a first rod portion 212 connected to each other. The first rod portion 212 extends into the liquid injection hole 20 , and the head portion 211 extends into the accommodating space 24 .

[0081] Specifically, the second cavity 19 hides the sealing cover 22, thereby improving the utilization rate of the battery's external space and reducing the influence of the sealing cover 22 on the battery's appearance design and thickness design, thereby making the battery as thin as possible.

[0082] Optionally, the base plate 10 assembly also includes a second insulating member 32 and a lead-out plate 33 connected to each other, the second insulating member 32 includes a third plate portion 321, the third plate portion 321 is provided with a first hole 322, the first hole 322 cooperates with the barrel portion 252, the lead-out plate 33 includes a fourth plate portion 331, the fourth plate portion 331 is tightly attached to the third plate portion 321, the fourth plate portion 331 is provided with a second hole 332, the second hole 332 cooperates with the barrel portion 252, and the first hole 322 and the second hole 332 both accommodate the second rod portion 172.

[0083] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The base plate 10 assembly also includes a first insulating member 25, the pole 17 includes a first plate portion 171 and a second rod portion 172 connected to each other, the first insulating member 25 includes a second plate portion 251 and a barrel portion 252 connected to each other, the second rod portion 172 extends into the barrel portion 252, the barrel portion 252 extends into the pole hole 16, and the first plate portion 171 abuts against the second plate portion 251.

[0084] The present utility model also provides an energy storage device, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , including a middle frame 26, a pole core 27 and the aforementioned base plate 10 assembly. The middle frame 26 is connected to the base plate 10 assembly and encloses a receiving cavity 29. The receiving cavity 29 is connected to the injection hole 20 and the pole hole 16. The receiving cavity 29 is used to receive the pole core 27.

[0085] Optionally, the pole core 27 encloses an escape space, and the escape space is used to accommodate the first cavity 15 and the second cavity 19. Optionally, the pole core 27 is connected to the pole ear 30.

[0086] Optionally, the shape of the middle frame 26 may be polygonal, circular, elliptical, or asymmetrical, etc. Optionally, the shape of the middle frame 26 may be, but is not limited to, square, circular, hexagonal, or asymmetrical (eg, L-shaped), etc.

[0087] Optionally, the middle frame 26 and the bottom plate 10 can be made in one piece, or can be made separately and then connected together. Optionally, the connection method of the middle frame 26 and the bottom plate 10 can be ultrasonic welding, hot melt welding, laser welding and snap connection, etc. Optionally, the middle frame 26 and the bottom plate 10 are welded together, and a metal material with a lower melting point than the middle frame 26 and the bottom plate 10 is used as a solder, and the middle frame 26, the bottom plate 10 and the solder are heated to a temperature higher than the melting point of the solder and lower than the melting point of the middle frame 26 and the bottom plate 10. The liquid solder is used to wet the middle frame 26 and the bottom plate 10, and the interface gap between the middle frame 26 and the bottom plate 10 is filled, so as to realize the welding of the middle frame 26 and the bottom plate 10. The welding form of the middle frame 26 and the bottom plate 10 allows the shape of the middle frame 26 and the shape of the bottom plate 10 to have a variety of options, and the welding method is stable and reliable.

[0088] Optionally, the energy storage device also includes a top plate 28, which is arranged relative to the bottom plate 10 and has a spacing distance, and the top plate 28 is connected to the middle frame 26. The top plate 28, the middle frame 26 and the bottom plate 10 enclose a receiving cavity, which is used to receive the electrolyte and the pole core 27. Optionally, the material of the top plate 28 can be steel, aluminum alloy, etc. Optionally, the thickness of the top plate 28 ranges from 15 microns to 500 microns. Optionally, the thickness of the top plate 28 can be specifically but not limited to 15 microns, 30 microns, 200 microns, 300 microns and 500 microns. Optionally, the top plate 28 and the middle frame 26 can be made in one piece, or they can be made separately and then connected together. Optionally, the connection method between the top plate 28 and the middle frame 26 can be ultrasonic welding, hot melt welding, laser welding and snap connection, etc. The optional top plate 28 and the middle frame 26 are welded together, and a metal material with a lower melting point than the top plate 28 and the middle frame 26 is used as a brazing material. The top plate 28, the middle frame 26 and the brazing material are heated to a temperature higher than the melting point of the brazing material and lower than the melting point of the top plate 28 and the middle frame 26. The liquid brazing material is used to wet the top plate 28 and the middle frame 26 and fill the interface gap between the top plate 28 and the middle frame 26, thereby realizing the welding of the top plate 28 and the middle frame 26. The welding form of the top plate 28 and the middle frame 26 allows for a variety of options for the shape of the top plate 28 and the shape of the middle frame 26, and the welding method has a stable connection and a high degree of reliability.

[0089] Optionally, the top plate 28 may be in a polygonal, circular, elliptical, or heteromorphic shape. Optionally, the top plate 28 may be in a square, circular, hexagonal, or heteromorphic (eg, L-shaped) shape, but is not limited thereto.

[0090] An embodiment of the utility model further provides an electrical equipment, including an electrical device and an energy storage device as described above, wherein the energy storage device is used to supply power to the electrical device.

[0091] Optionally, the electrical device may be a watch, a mobile phone, a tablet computer, a car, a two-wheeled electric vehicle, a three-wheeled electric vehicle, a television, a washing machine, etc., which is not limited in the present utility model.

[0092] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship of the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0093] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the present invention still fall within the scope covered by the present invention.

Claims

1. A base plate, characterized in that: include: A plate body, comprising a first surface and a second surface facing each other, wherein the second surface is used to face the pole core; A first sinking platform is connected to the plate body, the first surface extends to the first sinking platform to form a first cavity, a through pole hole is formed on the bottom wall of the first cavity, and the first cavity is used to receive the pole arranged in the pole hole; The second sinker is connected to the plate body, the second sinker is spaced apart from the first sinker, the first surface extends to the second sinker to form a second cavity, the bottom wall of the second cavity is provided with a through injection hole, and the second cavity is used to accommodate an injection plug arranged in the injection hole.

2. The base plate according to claim 1, characterized in that The plate body, the first sinking platform and the second sinking platform are an integrated structure.

3. The base plate according to claim 1, characterized in that: The first recessed platform protrudes from the second surface, and / or the second recessed platform protrudes from the second surface.

4. The base plate according to claim 1, characterized in that: The first sunken platform and the second sunken platform are arranged near the first edge of the plate body and are spaced apart along the first edge.

5. The base plate according to claim 4, characterized in that The first sink is in a rectangular shape, and / or the second sink is in a circular shape, and the injection hole is a circular hole.

6. The base plate according to claim 1, characterized in that The depth of the first cavity is greater than the depth of the second cavity.

7. The base plate according to claim 1, characterized in that The depth of the first cavity is H1, which satisfies: 0.8 mm ≤ H1 ≤ 1.2 mm.

8. The base plate according to claim 1, characterized in that The length of the first cavity is A1, and the width of the first cavity is A2, which satisfies: 13mm≤A1≤15mm, 5mm≤A2≤7mm.

9. The base plate according to claim 1, characterized in that: The depth of the second cavity is H2, which satisfies: 0.5 mm ≤ H1 ≤ 0.7 mm.

10. The base plate according to claim 1, characterized in that The diameter of the second cavity is B, which satisfies: 3.0 mm ≤ B ≤ 4.0 mm.

11. The base plate according to claim 1, characterized in that The distance between the center of the first sinker and the center of the second sinker is C, which satisfies: 3.0 mm≤C≤10.0 mm.

12. The base plate according to claim 1, characterized in that The bottom plate is made of steel.

13. The base plate according to any one of claims 1 to 12, characterized in that: A pressure relief groove is provided on the first surface or the second surface, the depth of the pressure relief groove is D1, and the thickness of the plate body is D2, satisfying: D1<D2.

14. A base plate assembly, characterized in that: It comprises a pole, a liquid injection plug and a bottom plate as claimed in any one of claims 1 to 13, wherein the pole is passed through the pole hole, and the liquid injection plug is passed through the liquid injection hole.

15. The base plate assembly according to claim 14, characterized in that The bottom plate assembly further includes a sealing cover, which encloses a containing space, and an end surface of the sealing cover close to the first surface is located between the first surface and the bottom wall of the second cavity.

16. The base plate assembly according to claim 14, wherein: The base plate assembly also includes a first insulating member, the pole includes a first plate portion and a second rod portion connected to each other, the first insulating member includes a second plate portion and a barrel portion connected to each other, the second rod portion extends into the barrel portion, the barrel portion extends into the pole hole, and the first plate portion abuts against the second plate portion.

17. An energy storage device, characterized in that: It comprises a middle frame, a pole core and a base plate assembly as claimed in any one of claims 14 to 16, wherein the middle frame is connected to the base plate assembly and encloses a receiving cavity, the receiving cavity is connected to the injection hole and the pole hole, and the receiving cavity is used to receive the pole core.

18. An electrical equipment, characterized in that: It comprises an electric device and an energy storage device as claimed in claim 17, wherein the energy storage device is used to supply power to the electric device.

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