WO2024087376A1 - 储能装置与用电设备 - Google Patents

储能装置与用电设备 Download PDF

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Publication number
WO2024087376A1
WO2024087376A1 PCT/CN2022/142839 CN2022142839W WO2024087376A1 WO 2024087376 A1 WO2024087376 A1 WO 2024087376A1 CN 2022142839 W CN2022142839 W CN 2022142839W WO 2024087376 A1 WO2024087376 A1 WO 2024087376A1
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WO
WIPO (PCT)
Prior art keywords
lower plastic
explosion
protrusion
proof net
energy storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/142839
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English (en)
French (fr)
Inventor
梁金云
王静霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Hithium Energy Storage Technology Co Ltd
Original Assignee
Xiamen Hithium Energy Storage Technology Co Ltd
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Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=85355741&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2024087376(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Xiamen Hithium Energy Storage Technology Co Ltd filed Critical Xiamen Hithium Energy Storage Technology Co Ltd
Priority to KR1020237041390A priority Critical patent/KR102908601B1/ko
Priority to EP22937685.0A priority patent/EP4383445A4/en
Priority to US18/384,027 priority patent/US12308449B2/en
Publication of WO2024087376A1 publication Critical patent/WO2024087376A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/143—Fireproof; Explosion-proof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of energy storage technology, and in particular to an energy storage device and an electrical equipment.
  • Secondary batteries such as lithium-ion batteries
  • lithium-ion batteries use lower plastic to separate the internal winding core from the top cover to prevent the internal battery cells from contacting the bare aluminum sheet on the top cover and causing a short circuit in the battery cells.
  • a main purpose of the present application is to provide an energy storage device that can effectively prevent the deformation and warping of the lower plastic when the area of the lower plastic is large, and the shrinkage seriously affects the structural strength, and at the same time prevent the negative electrode tab from being inserted into the gap between the first lower plastic and the second lower plastic.
  • an energy storage device comprising:
  • a first lower plastic and a second lower plastic wherein the first lower plastic and the second lower plastic are spaced apart from each other, an explosion-proof net is provided at one end of the first lower plastic facing the second lower plastic, a protrusion is provided at one end of the second lower plastic facing the first lower plastic, and the explosion-proof net and the protrusion protrude toward the same side; a first mounting hole is formed on the first lower plastic, and a second mounting hole is formed on the second lower plastic;
  • a positive electrode column and a negative electrode column wherein the positive electrode column is assembled on the second mounting hole of the second lower plastic, and the negative electrode column is assembled on the first mounting hole of the first lower plastic;
  • a positive electrode connecting piece and a negative electrode connecting piece wherein the positive electrode connecting piece is located on the side of the second lower plastic provided with the protrusion and connected to the positive electrode column; the negative electrode connecting piece is located on the side of the first lower plastic provided with the explosion-proof net and connected to the negative electrode column;
  • a positive electrode tab and a negative electrode tab wherein the positive electrode tab is connected to the positive electrode connecting sheet, and the negative electrode tab is connected to the negative electrode connecting sheet; the positive electrode tab is located on the side of the protrusion away from the explosion-proof net, and the negative electrode tab is located on the side of the explosion-proof net away from the protrusion.
  • the protrusion in the width direction of the second lower plastic, forms a limiting surface on the side away from the first lower plastic, and the limiting surface is configured to form a limit for the positive electrode connecting piece to be assembled on the second lower plastic.
  • an extension portion protruding along the thickness direction of the second lower plastic is formed on the side in the width direction of the second lower plastic, and the extension portion and the protruding portion protrude toward the same side of the second lower plastic.
  • the height of the protruding portion is greater than the height of the extending portion.
  • the height of the explosion-proof net is greater than the height of the protrusion.
  • the first lower plastic in the width direction of the first lower plastic, includes first bosses located on both sides of the explosion-proof net, and a plurality of guide holes are formed on the first bosses; in the thickness direction of the first lower plastic, the height of the first bosses is greater than the height of the explosion-proof net.
  • the height of the protrusion is 60% to 90% of the height of the explosion-proof net.
  • the height of the protrusion is 0.1 mm to 10 mm.
  • the first lower plastic includes a first lower plastic body and the explosion-proof net, and in the width direction of the first lower plastic, at least one end of the explosion-proof net is formed with a first reinforcing rib connecting the explosion-proof net and the first lower plastic body.
  • the first lower plastic includes a first lower plastic body and a second boss, the second boss and the explosion-proof net are located at two ends of the first lower plastic body, and the second boss and the explosion-proof net protrude toward the same side of the first lower plastic; in the width direction of the first lower plastic, at least one end of the second boss is formed with a second reinforcing rib connecting the second boss and the first lower plastic body.
  • the second lower plastic includes a second lower plastic body and the raised portion, and in the width direction of the second lower plastic, at least one end of the raised portion is formed with a third reinforcing rib connecting the raised portion and the second lower plastic body.
  • the first lower plastic includes a second lower plastic body and a third boss, the third boss and the raised portion are located at two ends of the second lower plastic body, and the third boss and the raised portion protrude toward the same side of the second lower plastic; in the width direction of the second lower plastic, at least one end of the third boss is formed with a fourth reinforcing rib connecting the third boss and the second lower plastic body.
  • the gap between the first lower plastic and the second lower plastic is the gap between the explosion-proof net and the protruding portion.
  • the gap is 0.1 mm to 10 mm.
  • an electrical device which includes the above-mentioned energy storage device.
  • FIG1 is an exploded view of an energy storage device provided in one embodiment of the present application.
  • FIG2 is a top view of a lower plastic provided by an embodiment of the present application.
  • FIG3 is a bottom view of the lower plastic provided by one embodiment of the present application.
  • FIG4 is an axial view of a lower plastic provided by an embodiment of the present application.
  • FIG. 5 is an axial view of the lower plastic provided in another embodiment of the present application.
  • first lower plastic 310. first mounting hole; 311. first lower plastic body; 312. explosion-proof net; 313. second boss; 314. first extension; 315. first reinforcing rib; 316. second reinforcing rib; 317. first boss;
  • the inventors have found that the existing one-piece lower plastic is suitable for smaller battery cells, while larger battery cells require a lower plastic with a larger area. At this time, due to the large area, the time required to fill the mold cavity with injection liquid is correspondingly longer.
  • the lower plastic produced due to the different cooling times of the lower plastics in different parts is prone to deformation and warping, and shrinkage seriously affects the structural strength, which is a major obstacle to the production of the lower plastic. If these defects need to be prevented from occurring, more raw materials are often required to increase the stability of the structure, which increases the manufacturing cost and process difficulty.
  • the embodiment of the present application first provides an energy storage device, as shown in Figures 1 to 5, the energy storage device includes: a first lower plastic 31 and a second lower plastic 32, a positive electrode column 21, a negative electrode column 22, a positive electrode connecting piece 41, a negative electrode connecting piece 42, a positive electrode tab 51 and a negative electrode tab 52.
  • An explosion-proof net 312 is provided at one end of the first lower plastic 31 facing the second lower plastic 32, and a protrusion 322 is provided at one end of the second lower plastic 32 facing the first lower plastic 31, and the explosion-proof net 312 and the protrusion 322 protrude toward the same side;
  • a first mounting hole 310 is formed on the first lower plastic 31, and a second mounting hole 320 is formed on the second lower plastic 32, the positive pole 21 is assembled on the second mounting hole 320 of the second lower plastic 32, and the negative pole 22 is assembled on the first mounting hole 310 of the first lower plastic 31;
  • the positive electrode connecting piece 41 is located on the side of the second lower plastic 32 provided with the protrusion 322, and is connected to the positive pole 21;
  • the negative electrode connecting piece 42 is located on the side of the first lower plastic 31 provided with the explosion-proof net 312, and is connected to the negative pole 22.
  • the positive electrode tab 51 is connected to the positive electrode connecting sheet 41
  • the negative electrode tab 52 is connected to the negative electrode connecting sheet 42 .
  • the positive electrode tab 51 is located on the side of the protrusion 322 away from the explosion-proof net 312
  • the negative electrode tab 52 is located on the side of the explosion-proof net 312 away from the protrusion 322 .
  • the lower plastic includes a first lower plastic 31 and a second lower plastic 32 which are separately arranged, which can effectively prevent the lower plastic from deforming and warping when the area of the lower plastic is large, and shrinking seriously affects the structural strength; when a certain part of the lower plastic has a quality problem, only the corresponding lower plastic needs to be scrapped, which reduces material loss, manufacturing cost and process difficulty; at the same time, a raised explosion-proof net 312 is provided at one end of the first lower plastic 31 facing the second lower plastic 32, and the explosion-proof net 312 is located between the negative electrode connecting piece 42 and the gap, and the distance between the negative electrode connecting piece 42 and the gap is increased by the explosion-proof net 312, thereby increasing the negative electrode connection piece 42 and the gap.
  • the distance between the negative electrode tab 52 and the gap can prevent the negative electrode tab 52 from being inserted into the gap between the first lower plastic 31 and the second lower plastic 32 and abutting against the top cover (light aluminum plate) 10, thereby preventing the battery cell 53 from short-circuiting and improving the safety of the energy storage device;
  • a protrusion 322 is provided at one end of the second lower plastic 32 facing the first lower plastic 31, and the protrusion 322 is located between the positive electrode connecting piece 41 and the positive electrode tab 51 and the gap.
  • the protrusion 322 can limit the positive electrode connecting piece 41 and the positive electrode tab 51, preventing the positive electrode tab 51 from being inserted into the gap and folding, bending, and breaking, causing problems such as poor conductive contact.
  • the energy storage device further includes: a top cover 10, a battery cell 53 and a shell 60.
  • the battery cell 53 is accommodated in the shell 60
  • the top cover 10 and the first lower plastic 31 and the second lower plastic 32 cover the opening of the shell 60
  • the positive pole ear 51 of the battery cell 53 is connected to the positive pole column 21 on the top cover 10 through the positive electrode connecting piece 41
  • the negative pole ear 52 of the battery cell 53 is connected to the negative pole column 22 on the top cover 10 through the negative electrode connecting piece 42.
  • the top cover 10 is also provided with an explosion-proof valve 110 and a liquid injection hole 120.
  • the explosion-proof valve 110 is located above the explosion-proof net 312, and the second lower plastic 32 is provided with a through hole connected to the liquid injection hole 120.
  • the first lower plastic 31 and the second lower plastic 32 are distributed along the length direction X, and there is a gap A between the first lower plastic 31 and the second lower plastic 32.
  • the first lower plastic 31 and the second lower plastic 32 are spaced apart along the length direction X, and the lower plastic is divided into two parts with a smaller length and width ratio, which reduces the difficulty of the manufacturing process of the lower plastic and the strength requirements of the material, and when a quality problem occurs in a certain part of the first lower plastic 31 and the second lower plastic 32, only half of the lower plastic needs to be scrapped, which reduces material loss.
  • the lower plastic of the energy storage device may also include a third lower plastic, a fourth lower plastic or more lower plastics, and the multiple lower plastics may be distributed along the length direction X, or along the width direction Y, or distributed in both the length direction X and the width direction Y, and the present application does not limit this.
  • the gap A between the first lower plastic 31 and the second lower plastic 32 is the gap between the explosion-proof net 312 and the protrusion 322, that is, the explosion-proof net 312 is located at the end of the first lower plastic 31 close to the second lower plastic 32, and the protrusion 322 is located at the end of the second lower plastic 32 close to the first lower plastic 31.
  • the explosion-proof net 312 and the protrusion 322 protrude toward the same side, which can further prevent the positive electrode tab 51 from being folded, bent, or broken when inserted into the gap, causing problems such as poor conductive contact.
  • the width of the protrusion 322 is greater than the width of the gap A.
  • the width of the gap A can be made relatively small, thereby further preventing the positive electrode tab 51 from being inserted into the gap A between the explosion-proof net 312 and the protrusion 322 and being folded, bent, or broken, resulting in poor conductive contact.
  • the width of the protrusion 322 can also be less than or equal to the width of the gap A, and this application does not limit this.
  • the gap A between the first lower plastic 31 and the second lower plastic 32 is 0.1mm ⁇ 10mm, that is, the gap A between the explosion-proof net 312 and the raised portion 322 is 0.1mm ⁇ 10mm, for example 0.1mm, 1mm, 3mm, 5mm, 8mm, 0.1mm, 10mm, etc., which are not listed one by one in this application; preferably, the width of the gap A is 1.5mm ⁇ 5.5mm to prevent the positive electrode ear 51 from being inserted into the gap A between the explosion-proof net 312 and the raised portion 322 and folding, bending, and breaking, resulting in poor conductive contact; of course, the gap A may also be less than 0.1mm or greater than 10mm, and this application does not limit this.
  • the side of the protrusion 322 away from the first lower plastic 31 forms a limiting surface, and the limiting surface is configured to form a limit for the positive electrode connecting piece 41 to be assembled on the second lower plastic 32.
  • the positive electrode connecting piece 41 is limited to be assembled on the second lower plastic 32 by the limiting surface, so as to avoid misalignment when the positive electrode connecting piece 41 is assembled on the second lower plastic 32.
  • the height of the explosion-proof net 312 is greater than the height of the protrusion 322.
  • the distance between the explosion-proof net 312 and the explosion-proof valve 110 set later can be increased, which is convenient for gas storage and the smooth flow of gas rushing out of the explosion-proof valve 110 after the explosion-proof net 312 is completely melted; at the same time, by making the height of the protrusion 322 smaller than the explosion-proof net 312, it is ensured that the gas on the side of the protrusion 322 away from the explosion-proof net 312 can flow and be discharged to the explosion-proof net 312; if the height of the protrusion 322 is higher than the height of the explosion-proof net 312, during the use process after assembly, the protrusion 322 may be against the end face of the battery cell 53, preventing the gas on one side of the protrusion 322 from gathering at the explosion-proof net 31
  • the explosion-proof net 312 in the width direction Y of the first lower plastic 31, includes first bosses 317 formed on both sides, and a plurality of guide holes are formed on the first bosses 317; in the thickness direction Z of the first lower plastic 31, the height of the first bosses 317 is greater than the height of the explosion-proof net 312.
  • the area below the explosion-proof net 312 is kept free of air, thereby avoiding blocking the air holes of the explosion-proof net 312 provided on the first lower plastic 31; when the air pressure inside the battery cell rises sharply, timely exhaust can be ensured, which greatly improves the safety of the energy storage device.
  • the height of the protrusion 322 is 60% to 90% of the height of the explosion-proof net 312, such as 60%, 70%, 80%, 90%, etc., which are not listed here.
  • the height of the protrusion 322 can be slightly lower than the explosion-proof net 312.
  • the protrusion 322 has a sufficiently high limiting surface, which improves the limiting effect of forming the positive electrode connecting piece 41 assembled on the second lower plastic 32.
  • the height of the protrusion 322 can also be less than 60% or greater than 90% of the height of the explosion-proof net 312, and the present application does not limit this.
  • the height of the raised portion 322 is 0.1mm to 10mm, for example, 0.1mm, 1mm, 3mm, 5mm, 8mm, 0.1mm, 10mm, etc., which are not listed one by one in this application; preferably, the height of the raised portion 322 is 1.5mm to 5.5mm, which ensures that the raised portion 322 has a sufficiently high limiting surface, thereby improving the limiting effect of forming the positive electrode connecting piece 41 assembled on the second lower plastic 32, and preventing the positive electrode ear 51 from being inserted into the gap between the explosion-proof net 312 and the raised portion 322, thereby preventing the positive electrode ear 51 from being folded, bent, or broken.
  • the height of the raised portion 322 may also be less than 0.1mm or greater than 10mm, which is not limited in this application.
  • the first lower plastic 31 includes a first lower plastic body 311 and an explosion-proof net 312.
  • the first reinforcing rib 315 connecting the explosion-proof net 312 and the first lower plastic body 311 is formed with a first reinforcing rib 315 connecting the explosion-proof net 312 and the first lower plastic body 311.
  • the first reinforcing ribs 315 are respectively formed on the sides of the two first bosses 317 close to the periphery, and the first reinforcing ribs 315 connect the first bosses 317 and the first lower plastic body 311.
  • the first lower plastic 31 further includes a first extension portion 314, which is located on both sides of the first lower plastic body 311 in the width direction Y and protrudes along the thickness direction Z of the first lower plastic 31.
  • the first extension portion 314 and the explosion-proof net 312 protrude toward the same side of the first lower plastic 31, and the protruding first extension portion 314 is equivalent to forming a skirt of the first lower plastic 31, which can be used as a reinforcing rib of the first lower plastic 31, thereby improving the structural strength of the first lower plastic 31.
  • First reinforcing ribs 315 connecting the explosion-proof net 312 and the first extension portion 314 are formed at both ends of the explosion-proof net 312, further improving the structural strength of the first lower plastic 31 and increasing the area of the maylar protective film for hot melting.
  • the first lower plastic 31 further includes a second boss 313, the second boss 313 and the explosion-proof net 312 are located at both ends of the first lower plastic body 311, and the second boss 313 and the explosion-proof net 312 protrude toward the same side of the first lower plastic 31; in the width direction Y of the first lower plastic 31, at least one end of the second boss 313 is formed with a second reinforcing rib 316 connecting the second boss 313 and the first lower plastic body 311.
  • first reinforcing rib 315 connecting the second boss 313 and the first lower plastic body 311 at at least one end of the second boss 313, the structural strength of the first lower plastic 31 can be improved, and the area of the maylar protective film hot-melt can be increased.
  • first reinforcing ribs 315 connecting the second boss 313 and the first extension portion 314 are formed at both ends of the second boss 313 , further improving the structural strength of the first lower plastic 31 and increasing the area of the maylar protective film for hot melting.
  • the first reinforcing rib 315 on the first lower plastic 31 may be in the shape of a triangle, and the second reinforcing rib 316 may be in the shape of a rectangle.
  • the first reinforcing rib 315 and the second reinforcing rib 316 may be an integrally formed structure.
  • the first reinforcing rib 315 may also be in the shape of a rectangle, a trapezoid, a fan, etc.
  • the second reinforcing rib 316 may also be in the shape of a triangle, a trapezoid, a fan, etc., and the present application does not limit this.
  • the second lower plastic 32 includes a second lower plastic body 321 and a protrusion 322.
  • the protrusion 322 is formed with a third reinforcing rib 325 connecting the protrusion 322 and the second lower plastic body 321.
  • the structural strength of the second lower plastic 32 can be improved, and the area of the maylar protective film hot-melt can be increased.
  • the second lower plastic 32 further includes a second extension portion 324, which is located on both sides of the second lower plastic body 321 in the width direction Y and protrudes along the thickness direction Z of the second lower plastic 32.
  • the second extension portion 324 and the protruding portion 322 protrude toward the same side of the second lower plastic 32, and the protruding second extension portion 324 is equivalent to forming a skirt of the second lower plastic 32, which can be used as a reinforcing rib of the second lower plastic 32, thereby improving the structural strength of the second lower plastic 32.
  • a third reinforcing rib 325 connecting the protruding portion 322 and the second extension portion 324 is formed at both ends of the protruding portion 322, further improving the structural strength of the second lower plastic 32 and increasing the area of the maylar protective film for hot melting.
  • the second lower plastic 32 further includes a third boss 323, the third boss 323 and the raised portion 322 are located at both ends of the second lower plastic body 321, and the third boss 323 and the raised portion 322 are raised toward the same side of the second lower plastic 32; in the width direction Y of the second lower plastic 32, at least one end of the third boss 323 is formed with a fourth reinforcing rib 326 connecting the third boss 323 and the second lower plastic body 321.
  • the fourth reinforcing rib 326 connecting the third boss 323 and the second lower plastic body 321 at at least one end of the third boss 323, the structural strength of the second lower plastic 32 can be improved, and the area of the maylar protective film hot-melt can be increased.
  • the first boss 317, the second boss 313 and the third boss 323 can limit the position of the battery cell 53 below, and prevent the battery cell 53 from moving when it is vibrated.
  • the first boss 317, the second boss 313 and the third boss 323 and the maylar protective film it can be ensured that the entire battery cell is covered with the maylar protective film, thereby improving the insulation effect.
  • fourth reinforcing ribs 326 connecting the third boss 323 and the second extension portion 324 are formed at both ends of the third boss 323 , further improving the structural strength of the second lower plastic 32 and increasing the area of the maylar protective film for hot melting.
  • the third reinforcing rib 325 on the second lower plastic 32 may be in the shape of a triangle
  • the fourth reinforcing rib 326 may be in the shape of a rectangle
  • the first reinforcing rib 315 and the second reinforcing rib 316 may be an integrally formed structure.
  • the third reinforcing rib 325 may also be in the shape of a rectangle, a trapezoid, a fan, etc.
  • the fourth reinforcing rib 326 may also be in the shape of a triangle, a trapezoid, a fan, etc., and this application does not limit this.
  • the height of the protrusion 322 is greater than the height of the second extension 324.
  • the height of the protrusion 322 can also be equal to or less than the height of the second extension 324, and this application does not limit this.
  • the positive electrode connecting piece 41 may be an aluminum connecting piece
  • the negative electrode connecting piece 42 may be a copper connecting piece.
  • the energy storage device provided in the present application may be a single cell, or a battery pack or battery module including a plurality of single cells.
  • the embodiments of the present application also provide an electrical device, which includes the energy storage device described in the above embodiments.
  • the electrical device may be, for example, a vehicle.
  • the electrical device provided by the present application wherein the lower plastic of the energy storage device includes a first lower plastic and a second lower plastic that are separately arranged, can effectively prevent the lower plastic from deforming and warping when the area of the lower plastic is large, and shrinkage that seriously affects the structural strength; when quality problems occur in a certain part of the lower plastic, only the corresponding lower plastic needs to be scrapped, thereby reducing material loss, manufacturing cost and process difficulty; at the same time, a raised explosion-proof net is provided at one end of the first lower plastic that faces the second lower plastic, and the explosion-proof net is located between the negative electrode connecting piece and the gap, and the distance between the negative electrode connecting piece and the gap is increased by the explosion-proof net.
  • a protrusion is provided on one end of the second lower plastic facing the first lower plastic, and the protrusion is located between the positive electrode connecting piece and the positive electrode tab and the gap. The protrusion can limit the positive electrode connecting piece and the positive electrode tab, preventing the positive electrode tab from being inserted into the gap and folding, bending, and breaking, causing problems such as poor conductive contact, thereby improving the safety of electrical equipment.
  • the term “plurality” refers to two or more than two, unless otherwise clearly defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense.
  • “connected” can be a fixed connection, a detachable connection, or an integral connection;
  • “connected” can be a direct connection or an indirect connection through an intermediate medium.
  • the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.
  • an embodiment means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment.
  • the schematic representation of the above terms does not necessarily refer to the same embodiment or example.
  • the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
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Abstract

一种储能装置与用电设备，储能装置包括：第一下塑胶（31）、第二下塑胶（32）、正极柱（21）、负极柱（22）、正极连接片（41）和负极连接片（42）。第一下塑胶（31）与第二下塑胶（32）间隔设置，第一下塑胶（31）朝向第二下塑胶（32）的一端设有防爆网（312），第二下塑胶（32）朝向第一下塑胶（31）的一端设有凸起部（322），且防爆网（312）与凸起部（322）朝向同一侧凸起；第一下塑胶（31）上形成第一安装孔（310），第二下塑胶（32）上形成有第二安装孔（320）；正极柱（21）装配于第二下塑胶（32）的第二安装孔（320）上，负极柱（22）装配于第一下塑胶（31）的第一安装孔（310）上；正极连接片（41）位于第二下塑胶（32）设有凸起部（322）的一侧，并与正极柱（21）连接；负极连接片（42）位于第一下塑胶（31）设有防爆网（312）的一侧，并与负极柱（22）连接。

Description

储能装置与用电设备
相关申请的交叉引用
本申请要求于2022年10月28日递交的、名称为《储能装置与用电设备》的中国专利申请第202211333975.7号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本申请涉及储能技术领域，具体而言，涉及一种储能装置与用电设备。
背景技术
二次电池(例如锂离子电池)具有能量密度高、功率密度高、循环使用次数多、存储时间长等优点，近些年在电动汽车、电动自行车等电动交通工具及储能设施等大中型电动设备方面已被广泛应用。
目前，锂离子电池通过下塑胶将内部卷芯与顶盖分隔开，防止内部电芯与顶盖光铝片接触从而造成电芯短路。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本申请的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本申请的一个主要目的在于提供一种储能装置，能有效避免下塑胶面积较大时出现下塑胶变形翘起，缩水严重影响结构强度等情况，同时能够防止负极极耳插入第一下塑胶和第二下塑胶的缝隙中。
为实现上述申请目的，本申请采用如下技术方案：
根据本申请的一个方面，提供了一种储能装置，该储能装置包括：
第一下塑胶和第二下塑胶，所述第一下塑胶与所述第二下塑胶间隔设置，所述第一下塑胶朝向所述第二下塑胶的一端设有防爆网，所述第二下塑胶朝向所述第一下塑胶的一端设有凸起部，且所述防爆网与所述凸起部朝向同一侧凸起；所述第一下塑胶上形成第一安装孔，所述第二下塑胶上形成有第二安装孔；
正极柱和负极柱，所述正极柱装配于所述第二下塑胶的第二安装孔上，所 述负极柱装配于所述第一下塑胶的第一安装孔上；
正极连接片和负极连接片，所述正极连接片位于所述第二下塑胶设有所述凸起部的一侧，并与所述正极柱连接；所述负极连接片位于所述第一下塑胶设有所述防爆网的一侧，并与所述负极柱连接；
正极极耳和负极极耳，所述正极极耳与所述正极连接片连接，所述负极极耳与所述负极连接片连接；所述正极极耳位于所述凸起部背离防爆网的一侧，所述负极极耳位于所述防爆网背离所述凸起部的一侧。
根据本申请的一实施方式，在所述第二下塑胶的宽度方向上，所述凸起部背离所述第一下塑胶一侧的形成有限位面，所述限位面被配置为形成所述正极连接片装配于所述第二下塑胶上的限位。
根据本申请的一实施方式，所述第二下塑胶的宽度方向上的侧边，形成有沿所述第二下塑胶的厚度方向凸起的延伸部，所述延伸部与所述凸起部朝向所述第二下塑胶的同一侧凸起。
根据本申请的一实施方式，在所述第二下塑胶的厚度方向上，所述凸起部的高度大于所述延伸部的高度。
根据本申请的一实施方式，在所述下塑胶的厚度方向上，所述防爆网的高度大于所述凸起部的高度。
根据本申请的一实施方式，在所述第一下塑胶的宽度方向上，所述第一下塑胶包括位于所述防爆网两侧的第一凸台，所述第一凸台上形成有多个导流孔；在所述第一下塑胶的厚度方向上，所述第一凸台的高度大于所述防爆网的高度。
根据本申请的一实施方式，在所述第二下塑胶的厚度方向上，所述凸起部的高度为所述防爆网高度的60％～90％。
根据本申请的一实施方式，在所述第二下塑胶的厚度方向上，所述凸起部的高度为0.1mm～10mm。
根据本申请的一实施方式，所述第一下塑胶包括第一下塑胶本体和所述防爆网，在所述第一下塑胶的宽度方向上，所述防爆网的至少一端形成有连接所述防爆网与所述第一下塑胶本体的第一加强筋。
根据本申请的一实施方式，所述第一下塑胶包括第一下塑胶本体和第二凸台，所述第二凸台与所述防爆网位于所述第一下塑胶本体的两端，且所述第二 凸台与所述防爆网朝向所述第一下塑胶的同一侧凸起；在所述第一下塑胶的宽度方向上，所述第二凸台的至少一端形成有连接所述第二凸台与所述第一下塑胶本体的第二加强筋。
根据本申请的一实施方式，所述第二下塑胶包括第二下塑胶本体和所述凸起部，在所述第二下塑胶的宽度方向上，所述凸起部的至少一端形成有连接所述凸起部与所述第二下塑胶本体的第三加强筋。
根据本申请的一实施方式，所述第一下塑胶包括第二下塑胶本体和第三凸台，所述第三凸台与所述凸起部位于所述第二下塑胶本体的两端，且所述第三凸台与所述凸起部朝向所述第二下塑胶的同一侧凸起；在所述第二下塑胶的宽度方向上，所述第三凸台的至少一端形成有连接所述第三凸台与所述第二下塑胶本体的第四加强筋。
根据本申请的一实施方式，所述第一下塑胶与所述第二下塑胶之间的间隙为所述防爆网与所述凸起部之间的间隙。
根据本申请的一实施方式，所述间隙为0.1mm～10mm。
根据本申请的另一个方面，提供了一种用电设备，该用电设备包括上述的储能装置。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本申请。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请的一种实施方式提供的储能装置的爆炸图；
图2为本申请的一种实施方式提供的下塑胶的俯视图；
图3为本申请的一种实施方式提供的下塑胶的仰视图；
图4为本申请的一种实施方式提供的下塑胶的轴视图；
图5为本申请的另一种实施方式提供的下塑胶的轴视图。
附图标记说明：
10、顶盖；110、防爆阀；120、注液孔；
21、正极柱；22、负极柱；
31、第一下塑胶；310、第一安装孔；311、第一下塑胶本体；312、防爆网；313、第二凸台；314、第一延伸部；315、第一加强筋；316、第二加强筋；317、第一凸台；
32、第二下塑胶；320、第二安装孔；321、第二下塑胶本体；322、凸起部；323、第三凸台；324、第二延伸部；325、第三加强筋；326、第四加强筋。
41、正极连接片；42、负极连接片；
51、正极极耳；52、负极极耳；53、电芯；
60、壳体。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本申请将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
发明人发现，现有的一体下塑胶适用与体形较小的电芯，体型较大的电芯需要使用面积更大的下塑胶，此时因为面积大当注塑液注入模腔填满的所需时间相应加长，各部位的下塑胶冷却时间不同所生产的下塑胶易出现下塑胶变形翘起，缩水严重影响结构强度等情况，对下塑胶的生产是一大阻碍，如需防止这些不良发生往往需要更多的原材料来增加其结构的稳定，提高了制造成本与工艺难度。
本申请的实施例首先提供了一种用于储能装置，如图1-图5所示，该储能装置包括：第一下塑胶31和第二下塑胶32以及正极柱21、负极柱22、正极连接片41、负极连接片42、正极极耳51和负极极耳52。第一下塑胶31朝向第二下塑胶32的一端设有防爆网312，第二下塑胶32朝向第一下塑胶31的一端设有凸起部322，且防爆网312与凸起部322朝向同一侧凸起；第一下塑胶31上形成第一安装孔310，第二下塑胶32上形成有第二安装孔320，正极柱21 装配于第二下塑胶32的第二安装孔320上，负极柱22装配于第一下塑胶31的第一安装孔310上；正极连接片41位于第二下塑胶32设有凸起部322的一侧，并与正极柱21连接；负极连接片42位于第一下塑胶31设有防爆网312的一侧，并与负极柱22连接。正极极耳51与正极连接片41连接，负极极耳52与负极连接片42连接，正极极耳51位于凸起部322背离防爆网312的一侧，负极极耳52位于防爆网312背离凸起部322的一侧。
本申请提供的储能装置，下塑胶包括分体设置的第一下塑胶31和第二下塑胶32，能有效避免下塑胶面积较大时出现下塑胶变形翘起，缩水严重影响结构强度等情况；当下塑胶某个部位出现质量问题时只需报废对应下塑胶即可，减少材料损耗，降低了制造成本与工艺难度；同时，第一下塑胶31朝向第二下塑胶32的一端设有凸起防爆网312，防爆网312位于负极连接片42与间隙之间，通过防爆网312增加了负极连接片42与间隙之间的距离，进而增加了负极极耳52与间隙之间的距离，从而能够防止负极极耳52插入第一下塑胶31和第二下塑胶32的间隙中与顶盖(光铝板)10抵接，防止电芯53出现短路，提高了储能装置的安全性；此外，第二下塑胶32朝向第一下塑胶31的一端设有凸起部322，凸起部322位于正极连接片41及正极极耳51位与间隙之间，通过凸起部322能够对正极连接片41、正极极耳51起到限位作用，防止正极极耳51插入间隙中翻折、弯折、断裂，造成导电接触不良等问题。
在本申请的一种实施例中，如图1所示，储能装置还包括：顶盖10、电芯53和壳体60，储能装置装配完成后，电芯53容置于壳体60内，顶盖10与第一下塑胶31和第二下塑胶32盖合于壳体60的开口上，电芯53的正极极耳51通过正极连接片41与顶盖10上的正极柱21连接，电芯53的负极极耳52通过负极连接片42与顶盖10上的负极柱22连接。此外，顶盖10还设有防爆阀110和注液孔120，防爆阀110位于防爆网312的上方，第二下塑胶32上设有连通注液孔120的通孔。
具体地，如图2和图3所述，第一下塑胶31与第二下塑胶32沿长度方向X分布，且第一下塑胶31与第二下塑胶32之间具有间隙A。第一下塑胶31与第二下塑胶32沿长度方向X间隔分布，将下塑胶分为长宽比较小的两部分，降低了下塑胶的制造工艺难度和对材料的强度要求，且当第一下塑胶31与第 二下塑胶32上某个部位出现质量问题时只需报废一半下塑胶即可，减少了材料损耗。当然，储能装置的下塑胶还可包括第三下塑胶、第四下塑胶或更多个下塑胶，多个下塑胶可沿长度方向X分布，也可沿宽度方向Y分布，或者长度方向X与宽度方向Y均进行分布，本申请对此不做限制。
其中，第一下塑胶31与第二下塑胶32之间的间隙A为防爆网312与凸起部322之间的间隙，即防爆网312位于第一下塑胶31靠近第二下塑胶32的端部，凸起部322位于第二下塑胶32靠近第一下塑胶31的端部，防爆网312与凸起部322朝向同一侧凸起，能够进一步防止正极极耳51插入间隙中出现翻折、弯折、断裂的情况，造成导电接触不良等问题。
其中，在第一下塑胶31的长度方向X上，凸起部322的宽度大于间隙A的宽度。通过使凸起部322的宽度大于间隙A的宽度，能够使间隙A的宽度相对较小，从而进一步防止正极极耳51插入防爆网312与凸起部322的间隙A中翻折、弯折、断裂，造成导电接触不良。当然，凸起部322的宽度也可小于或等于间隙A的宽度，本申请对此不做限制。
示例的，第一下塑胶31与第二下塑胶32之间的间隙A为0.1mm～10mm，即防爆网312与凸起部322之间的间隙A为0.1mm～10mm，例如0.1mm、1mm、3mm、5mm、8mm、0.1mm、10mm等，本申请在此不一一列举；优选地，间隙A的宽度为1.5mm～5.5mm，防止正极极耳51插入防爆网312与凸起部322的间隙A中翻折、弯折、断裂，造成导电接触不良；当然，间隙A也可小于0.1mm或大于10mm，本申请对此不做限制。
具体地，在第二下塑胶32的宽度方向Y上，凸起部322背离第一下塑胶31一侧的形成有限位面，限位面被配置为形成正极连接片41装配于第二下塑胶32上的限位。通过限位面形成正极连接片41装配于第二下塑胶32上的限位，避免正极连接片41装在第二下塑胶32上时出现错位。
其中，在下塑胶10的厚度方向Z上，防爆网312的高度大于凸起部322的高度。通过使防爆网312的高度大于凸起部322的高度，能够使得防爆网312与后续设置的防爆阀110之间的距离增大，便于气体储存和防爆网312整体熔断后气体冲出防爆阀110的畅通性；同时，通过使凸起部322的高度小于防爆网312，保证了凸起部322远离防爆网312一侧的气体可以往防爆网312 处流动和排出；若凸起部322的高度高于防爆网312的高度，在装配后使用过程中，凸起部322可能会与电芯53的端面相抵，阻碍凸起部322一侧的气体往防爆网312处聚集，使得气体不能及时通过防爆网312排出，增大了储能装置的安全隐患。
在本公开的一种实施例中，如图5所示，在第一下塑胶31的宽度方向Y上，防爆网312包括两侧分别形成有第一凸台317，第一凸台317上形成有多个导流孔；在第一下塑胶31的厚度方向Z上，第一凸台317的高度大于防爆网312的高度。通过使第一凸台317的高度大于防爆网312的高度，对防爆网312下方进行避空，避免堵塞第一下塑胶31上设置的防爆网312的透气孔；在电芯内部气压急剧升高时，能够保证及时排气，极大的提高了储能装置的安全性。
示例的，在第二下塑胶32的厚度方向Z上，凸起部322的高度为防爆网312高度的60％～90％，例如60％、70％、80％、90％等，本申请在此不一一列举。通过使凸起部322的高度为防爆网312高度的60％～90％，使得凸起部322的高度可略低于防爆网312，一方面保证了凸起部322远离防爆网312一侧的气体可以往防爆网312处流动和排出，另一方面还保证了凸起部322具有足够高的限位面，提高对形成正极连接片41装配于第二下塑胶32上的限位作用。当然，凸起部322的高度也可小于防爆网312高度的60％或大于90％，本申请对此不做限制。
示例的，在第二下塑胶32的厚度方向Z上，凸起部322的高度为0.1mm～10mm，例如0.1mm、1mm、3mm、5mm、8mm、0.1mm、10mm等，本申请在此不一一列举；优选地，凸起部322的高度为1.5mm～5.5mm，保证了凸起部322具有足够高的限位面，提高对形成正极连接片41装配于第二下塑胶32上的限位作用，同时防止正极极耳51插入防爆网312与凸起部322的缝隙中出现翻折、弯折、断裂的情况，凸起部322的高度也可小于0.1mm或大于10mm，本申请对此不做限制。
具体地，如图4所示，第一下塑胶31包括第一下塑胶本体311和防爆网312，在第一下塑胶31的宽度方向Y上，防爆网312的至少一端形成有连接防爆网312与第一下塑胶本体311的第一加强筋315。通过在防爆网312的至少 一端形成有连接防爆网312与第一下塑胶本体311的第一加强筋315，既可以提升第一下塑胶31的结构强度，又可以增加maylar保护膜热熔的面积。其中，当防爆网312两侧设置有第一凸台317时，两个第一凸台317靠近外围的侧边上分别形成第一加强筋315，第一加强筋315连接第一凸台317与第一下塑胶本体311。
如图4所示，第一下塑胶31还包括第一延伸部314，第一延伸部314位于第一下塑胶本体311的宽度方向Y上的两侧，沿第一下塑胶31的厚度方向Z凸起。第一延伸部314与防爆网312朝向第一下塑胶31的同一侧凸起，通过凸起的第一延伸部314，相当于形成了第一下塑胶31的裙边，裙边可作为第一下塑胶31的加强筋，提高了第一下塑胶31的结构强度。防爆网312的两端均形成有连接防爆网312与第一延伸部314的第一加强筋315，进一步提高了第一下塑胶31的结构强度，增加了maylar保护膜热熔的面积。
如图4所示，第一下塑胶31还包括第二凸台313，第二凸台313与防爆网312位于第一下塑胶本体311的两端，且第二凸台313与防爆网312朝向第一下塑胶31的同一侧凸起；在第一下塑胶31的宽度方向Y上，第二凸台313的至少一端形成有连接第二凸台313与第一下塑胶本体311的第二加强筋316。通过在第二凸台313的至少一端形成有连接第二凸台313与第一下塑胶本体311的第一加强筋315，既可以提升第一下塑胶31的结构强度，又可以增加maylar保护膜热熔的面积。
如图4所示，第二凸台313的两端均形成有连接第二凸台313与第一延伸部314的第一加强筋315，进一步提高了第一下塑胶31的结构强度，增加了maylar保护膜热熔的面积。
其中，如图4所示，第一下塑胶31上的第一加强筋315可呈片状的三角形，第二加强筋316可呈片状的矩形，第一加强筋315和第二加强筋316可为一体成型形成的结构。当然，第一加强筋315也可呈矩形、梯形、扇形等形状，第二加强筋316也可呈三角形、梯形、扇形等形状，本申请对此不做限制。
具体地，如图4所示，第二下塑胶32包括第二下塑胶本体321和凸起部322，在第二下塑胶32的宽度方向Y上，凸起部322的至少一端形成有连接凸起部322与第二下塑胶本体321的第三加强筋325。通过在凸起部322的至少 一端形成有连接凸起部322与第二下塑胶本体321的第三加强筋325，既可以提升第二下塑胶32的结构强度，又可以增加maylar保护膜热熔的面积。
如图4所示，第二下塑胶32还包括第二延伸部324，第二延伸部324位于第二下塑胶本体321的宽度方向Y上的两侧，沿第二下塑胶32的厚度方向Z凸起。第二延伸部324与凸起部322朝向第二下塑胶32的同一侧凸起，通过凸起的第二延伸部324，相当于形成了第二下塑胶32的裙边，裙边可作为第二下塑胶32的加强筋，提高了第二下塑胶32的结构强度。凸起部322的两端均形成有连接凸起部322与第二延伸部324的第三加强筋325，进一步提高了第二下塑胶32的结构强度，增加了maylar保护膜热熔的面积。
如图4所示，第二下塑胶32还包括第三凸台323，第三凸台323与凸起部322位于第二下塑胶本体321的两端，且第三凸台323与凸起部322朝向第二下塑胶32的同一侧凸起；在第二下塑胶32的宽度方向Y上，第三凸台323的至少一端形成有连接第三凸台323与第二下塑胶本体321的第四加强筋326。通过在第三凸台323的至少一端形成有连接第三凸台323与第二下塑胶本体321的第四加强筋326，既可以提升第二下塑胶32的结构强度，又可以增加maylar保护膜热熔的面积。
其中，通过在第一下塑胶31上设置第一凸台317和第二凸台313，在第二下塑胶32上设置第三凸台323，通过第一凸台317、第二凸台313和第三凸台323能够限制下方的电芯53位置，防止电芯53受到震动时发生窜动。此外，通过第一凸台317、第二凸台313和第三凸台323的侧壁与maylar保护膜的热熔固定，能够保证整个电芯被maylar保护膜包覆，提高绝缘效果。
如图4所示，第三凸台323的两端均形成有连接第三凸台323与第二延伸部324的第四加强筋326，进一步提高了第二下塑胶32的结构强度，增加了maylar保护膜热熔的面积。
其中，如图4所示，第二下塑胶32上的第三加强筋325可呈片状的三角形，第四加强筋326可呈片状的矩形，第一加强筋315和第二加强筋316可为一体成型形成的结构。当然，第三加强筋325也可呈矩形、梯形、扇形等形状，第四加强筋326也可呈三角形、梯形、扇形等形状，本申请对此不做限制。
其中，在第二下塑胶32的厚度方向Z上，凸起部322的高度大于第二延 伸部324的高度。通过使凸起部322的高度大于第二延伸部324的高度，以保证通过高度较大的凸起部322能防止正极极耳51插入防爆网312与凸起部322的缝隙中与顶盖抵接。当然，凸起部322的高度也可等于或小于第二延伸部324的高度，本申请对此不做限制。
其中，正极连接片41可为铝制连接片，负极连接片42可为铜制连接片。在顶盖10与壳体60的材质均为铝时，为了防止顶盖10与壳体60腐蚀，在正极极柱组件中的上塑胶中增加少量导电物质，使得顶盖10和壳体60与正极柱21有弱电连接，因此正极极耳51到顶盖10的路径较短，改善了短路的问题。
本申请提供的储能装置可为单体电池，或包括多个单体电池的电池包或电池模组。
本申请的实施例还提供了一种用电设备，该用电设备包括上述实施例所述的储能装置，用电设备例如可为车辆。本申请提供的用电设备，其中的储能装置的下塑胶包括分体设置的第一下塑胶和第二下塑胶，能有效避免下塑胶面积较大时出现下塑胶变形翘起，缩水严重影响结构强度等情况；当下塑胶某个部位出现质量问题时只需报废对应下塑胶即可，减少材料损耗，降低了制造成本与工艺难度；同时，第一下塑胶朝向第二下塑胶的一端设有凸起防爆网，防爆网位于负极连接片与间隙之间，通过防爆网增加了负极连接片与间隙之间的距离，进而增加了负极极耳与间隙之间的距离，从而能够防止负极极耳插入第一下塑胶和第二下塑胶的间隙中与顶盖抵接，防止电芯出现短路，提高了储能装置的安全性；此外，第二下塑胶朝向第一下塑胶的一端设有凸起部，凸起部位于正极连接片及正极极耳位与间隙之间，通过凸起部能够对正极连接片、正极极耳起到限位作用，防止正极极耳插入间隙中翻折、弯折、断裂，造成导电接触不良等问题，提高了用电设备的安全性。
在本申请实施例中，术语“多个”则指两个或两个以上，除非另有明确的限定。术语“安装”、“相连”、“连接”、“固定”等术语均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；“相连”可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在申请实施例中的具体含义。
在本申请实施例的描述中，需要理解的是，术语“上”、“下”等指示的 方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述申请实施例和简化描述，而不是指示或暗示所指的装置或单元必须具有特定的方向、以特定的方位构造和操作，因此，不能理解为对申请实施例的限制。
在本说明书的描述中，术语“一个实施例”的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于申请实施例的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上仅为申请实施例的优选实施例而已，并不用于限制申请实施例，对于本领域的技术人员来说，申请实施例可以有各种更改和变化。凡在申请实施例的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在申请实施例的保护范围之内。

Claims (15)

  1. 一种储能装置，包括：
    第一下塑胶和第二下塑胶，所述第一下塑胶与所述第二下塑胶间隔设置，所述第一下塑胶朝向所述第二下塑胶的一端设有防爆网，所述第二下塑胶朝向所述第一下塑胶的一端设有凸起部，且所述防爆网与所述凸起部朝向同一侧凸起；所述第一下塑胶上形成第一安装孔，所述第二下塑胶上形成有第二安装孔；
    正极柱和负极柱，所述正极柱装配于所述第二下塑胶的第二安装孔上，所述负极柱装配于所述第一下塑胶的第一安装孔上；
    正极连接片和负极连接片，所述正极连接片位于所述第二下塑胶设有所述凸起部的一侧，并与所述正极柱连接；所述负极连接片位于所述第一下塑胶设有所述防爆网的一侧，并与所述负极柱连接；
    正极极耳和负极极耳，所述正极极耳与所述正极连接片连接，所述负极极耳与所述负极连接片连接；所述正极极耳位于所述凸起部背离防爆网的一侧，所述负极极耳位于所述防爆网背离所述凸起部的一侧。
  2. 根据权利要求1所述的储能装置，其中，在所述第二下塑胶的宽度方向上，所述凸起部背离所述第一下塑胶一侧的形成有限位面，所述限位面被配置为形成所述正极连接片装配于所述第二下塑胶上的限位。
  3. 根据权利要求1所述的储能装置，其中，所述第二下塑胶的宽度方向上的侧边，形成有沿所述第二下塑胶的厚度方向凸起的延伸部，所述延伸部与所述凸起部朝向所述第二下塑胶的同一侧凸起。
  4. 根据权利要求3所述的储能装置，其中，在所述第二下塑胶的厚度方向上，所述凸起部的高度大于所述延伸部的高度。
  5. 根据权利要求1所述的储能装置，其中，在所述下塑胶的厚度方向上，所述防爆网的高度大于所述凸起部的高度。
  6. 根据权利要求5所述的储能装置，其中，在所述第一下塑胶的宽度方向上，所述第一下塑胶包括位于所述防爆网两侧的第一凸台，所述第一凸台上形成有多个导流孔；在所述第一下塑胶的厚度方向上，所述第一凸台的高度大于所述防爆网的高度。
  7. 根据权利要求1所述的储能装置，其中，在所述第二下塑胶的厚度方向 上，所述凸起部的高度为所述防爆网高度的60％～90％。
  8. 根据权利要求7所述的储能装置，其中，在所述第二下塑胶的厚度方向上，所述凸起部的高度为0.1mm～10mm。
  9. 根据权利要求1所述的储能装置，其中，所述第一下塑胶包括第一下塑胶本体和所述防爆网，在所述第一下塑胶的宽度方向上，所述防爆网的至少一端形成有连接所述防爆网与所述第一下塑胶本体的第一加强筋。
  10. 根据权利要求1所述的储能装置，其中，所述第一下塑胶包括第一下塑胶本体和第二凸台，所述第二凸台与所述防爆网位于所述第一下塑胶本体的两端，且所述第二凸台与所述防爆网朝向所述第一下塑胶的同一侧凸起；在所述第一下塑胶的宽度方向上，所述第二凸台的至少一端形成有连接所述第二凸台与所述第一下塑胶本体的第二加强筋。
  11. 根据权利要求1所述的储能装置，其中，所述第二下塑胶包括第二下塑胶本体和所述凸起部，在所述第二下塑胶的宽度方向上，所述凸起部的至少一端形成有连接所述凸起部与所述第二下塑胶本体的第三加强筋。
  12. 根据权利要求1所述的储能装置，其中，所述第一下塑胶包括第二下塑胶本体和第三凸台，所述第三凸台与所述凸起部位于所述第二下塑胶本体的两端，且所述第三凸台与所述凸起部朝向所述第二下塑胶的同一侧凸起；在所述第二下塑胶的宽度方向上，所述第三凸台的至少一端形成有连接所述第三凸台与所述第二下塑胶本体的第四加强筋。
  13. 根据权利要求1所述的储能装置，其中，所述第一下塑胶与所述第二下塑胶之间的间隙为所述防爆网与所述凸起部之间的间隙。
  14. 根据权利要求13所述的储能装置，其中，所述间隙为0.1mm～10mm。
  15. 一种用电设备，包括权利要求1～14任一项所述的储能装置。
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