WO2021233080A1 - 端盖组件、电池单体、电池组、装置及注液方法 - Google Patents
端盖组件、电池单体、电池组、装置及注液方法 Download PDFInfo
- Publication number
- WO2021233080A1 WO2021233080A1 PCT/CN2021/089810 CN2021089810W WO2021233080A1 WO 2021233080 A1 WO2021233080 A1 WO 2021233080A1 CN 2021089810 W CN2021089810 W CN 2021089810W WO 2021233080 A1 WO2021233080 A1 WO 2021233080A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nail body
- wall
- end cover
- end cap
- cap assembly
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 19
- 239000007924 injection Substances 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 99
- 239000003792 electrolyte Substances 0.000 claims abstract description 14
- 239000011796 hollow space material Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
-
- 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
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
- H01M50/645—Plugs
-
- 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
- This application relates to the technical field of energy storage equipment, and in particular to an end cover assembly, a battery cell, a battery pack, a device, and a liquid injection method.
- lithium-ion battery cells have extremely high requirements on the sealing of the structure.
- the electrolyte is not allowed to leak out during use, otherwise it will pollute the surrounding air and environment.
- impurities such as water vapor are not allowed to enter the battery pack, which reduces the battery life.
- the embodiments of the present application provide an end cover assembly, a battery cell, a battery pack, a device, and a liquid injection method, aiming to improve the sealing performance of the end cover assembly.
- the end cover assembly includes: an end cover plate including a through hole for injecting electrolyte and a fixing part arranged around the through hole; a nail body, It includes an accommodating part for accommodating the fixing part.
- the accommodating part is ring-shaped and includes two inner walls spaced apart in the radial direction. The inner and outer walls of the fixing part are press-fitted with the two inner walls of the nail body to seal the through hole. .
- the nail body includes a cylinder for sealing the through hole and a cap connected to one end of the cylinder.
- the cap includes a convex portion arranged around the cylinder. Press fit with the inner wall of the fixed part, and press fit with the convex part and the outer wall of the fixed part.
- the end cap assembly further includes a sealing element, which is arranged between the nail body and the fixing part, so as to realize the press fit of the nail body and the fixing part.
- the column and the convex part respectively form two side walls of the receiving part, and the column and the convex part provide the fixed part with two limits, so that the force of the fixed part is more balanced, and the sealing performance of the end cover assembly can be improved.
- the end cap assembly further includes a sealing element, which is arranged between the nail body and the fixing part, so as to realize the press fit of the nail body and the fixing part.
- a sealing element which is arranged between the nail body and the fixing part, so as to realize the press fit of the nail body and the fixing part.
- the sealing element includes a first sealing element, which is sleeved between the cylinder and the inner wall of the fixing part.
- a first accommodating groove is provided on the inner wall of the column and/or the fixing portion, so that the first sealing member is located in the first accommodating groove.
- the first sealing element may be located in the first accommodating groove, and the first sealing element can be provided with a limit through the first accommodating groove, preventing the first sealing element from being misaligned, and ensuring that the first sealing element and the fixing part and/or the nail body Stability of relative position.
- the sealing element includes a second sealing element, which is sleeved between the outer wall of the fixed part and the convex part.
- a second accommodating groove is provided on the outer wall and/or the convex portion of the fixing portion, so that the second sealing member is located in the second accommodating groove.
- the second sealing element can be located in the second accommodating groove, and the second sealing element can be provided with a limit through the second accommodating groove, preventing the second sealing element from being misaligned, and ensuring the second sealing element and the fixing part and/or the nail body Stability of relative position.
- the seal includes an annular wall portion
- the cross-section of the ring-shaped wall is circular; the ring-shaped wall with the circular cross-section makes the nail body receive less resistance when it is pressed into the through hole, and is easy to assemble.
- the cross section of the ring-shaped wall portion is rectangular, so that the sealing member is arranged in surface contact with the fixing portion and/or the nail body.
- the surface-to-surface contact between the sealing element and the fixing part and/or the nail body can increase the contact area between the sealing element and the fixing part and/or the nail body, and improve the sealing performance of the end cover assembly.
- the end cap assembly further includes a locking component, which has a ring structure and is configured to be sleeved and locked outside the cap, so that the nail body and the fixing portion are press-fitted.
- a locking component By providing the locking component, a force can be applied from the nail body to the nail body and the fixing part to ensure the tightness of the mutual cooperation of the nail body and the fixing part.
- the fixing portion protrudes from the surface of the end cap.
- the nail body cooperates with the fixing part, and the fixing part protrudes from the surface of the end cover plate so that at least a part of the nail body protrudes from the surface of the end cover plate to facilitate the removal or installation of the nail body.
- the surface of the end cover plate is recessed to form a sinking platform, and the fixing part is connected to the bottom surface of the sinking platform.
- the flatness of the outer surface of the end cover plate can be ensured, and the space occupied by the end cover assembly can be reduced.
- an embodiment of the present application also provides a battery cell, which includes: a casing having an opening, and the above-mentioned end cover assembly is used to seal the opening.
- an embodiment of the present application also provides a battery pack, including: the above-mentioned battery cell, and a box for accommodating the battery cell.
- an embodiment of the present application also provides a device, including the above-mentioned battery cell, and the battery cell is used to provide electrical energy.
- an embodiment of the present application also provides a method for injecting a battery cell.
- the method includes:
- the nail body is sealed in the liquid injection hole, so that the fixing part is accommodated in the annular accommodating part of the nail body, and the inner and outer side walls of the fixing part are press-fitted with the inner wall of the accommodating part.
- the end cover assembly includes an end cover plate and a nail body, the end cover plate is provided with a through hole, and the nail body is used to seal the through hole.
- the outer circumference of the through hole is provided with a fixing part, and the nail body is matched with the fixing part and the inner wall of the through hole to increase the contact area between the nail body and the end cover plate, thereby improving the sealing effect.
- the nail body includes a ring-shaped receiving portion, and two inner walls of the ring-shaped receiving portion can be press-fitted with the inner wall and the outer wall of the fixing portion.
- the ring-shaped accommodating portion can provide the fixing portion with two limits to balance the force of the fixing portion, which not only prevents the fixing portion from tilting and deformation, but also increases the contact area between the nail body and the fixing portion, and improves the sealing effect.
- Fig. 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
- FIG. 2 is a schematic structural diagram of a battery pack provided by an embodiment of the present application.
- FIG. 3 is a schematic structural diagram of a battery module provided by an embodiment of the present application.
- FIG. 4 is a schematic structural diagram of a battery cell provided by an embodiment of the present application.
- Figure 5 is a perspective view of an end cap assembly provided by an embodiment of the present application.
- Figure 6 is a top view of an end cap assembly provided by an embodiment of the present application.
- Figure 7 is a cross-sectional view at A-A in Figure 6;
- FIG. 8 is a schematic diagram of a partial enlarged structure at I in FIG. 7 in an embodiment of the present application.
- FIG. 9 is a schematic diagram of a partial enlarged structure at I in FIG. 7 in another embodiment of the present application.
- FIG. 10 is a schematic diagram of a partial enlarged structure at I in FIG. 7 in still another embodiment of the present application.
- FIG. 11 is a schematic structural diagram of a first sealing member of an end cover assembly provided by an embodiment of the present application.
- FIG. 12 is a schematic structural diagram of a second sealing member of an end cap assembly provided by an embodiment of the present application.
- Figure 13 is a top view of an end cap assembly provided by another embodiment of the present application.
- Figure 14 is a cross-sectional view at B-B in Figure 13;
- FIG. 15 is a partial enlarged schematic diagram of the structure at II in FIG. 14;
- 16 is a schematic structural diagram of a nail body of an end cap assembly provided by an embodiment of the present application.
- Figure 17 is a cross-sectional view at C-C in Figure 16;
- FIG. 18 is a schematic structural diagram of a locking portion of an end cover assembly provided by an embodiment of the present application.
- Figure 19 is a cross-sectional view at D-D in Figure 18;
- FIG. 20 is a flowchart of a method for injecting a battery cell according to an embodiment of the present application.
- the seal is usually sealed in the injection port by plugging and unplugging.
- Lithium ions may produce gas during use, which may cause deformation of the lithium-ion battery casing, and the liquid injection port is flush with other parts of the casing, and the portion on the casing corresponding to the liquid injection port has a large deformation and is sealed. The parts may be displaced with the deformation of the shell, and eventually lead to failure of the seal of the liquid injection port.
- FIG. 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
- the vehicle includes a battery pack 1 and a vehicle body 2, and the battery pack 1 is provided on the vehicle body 2.
- the vehicle is a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
- the vehicle main body 2 is provided with a driving motor, which is electrically connected to the battery pack 1, and the battery pack 1 provides electric energy.
- the driving motor is connected to the wheels on the vehicle main body 2 through a transmission mechanism to drive the vehicle.
- the battery pack 1 may be horizontally arranged at the bottom of the vehicle body 2.
- FIG. 2 is a schematic structural diagram of a battery pack 1 provided by an embodiment of the present application.
- the battery pack 1 includes a box body 12 and a battery module 11 disposed in the box body 12.
- the number of battery modules 11 may be one or more. When there are multiple battery modules 11, the plurality of battery modules 11 are arranged in the box 12 in a row. There are many types of the box 12.
- the box 12 may be a frame-shaped box, a disk-shaped box, or a box-shaped box. Specifically, the box 12 may include a lower box for accommodating battery modules and a lower box. The upper box with the lid closed.
- FIG. 3 is a schematic structural diagram of a battery module 11 provided by an embodiment of the present application.
- the battery module 11 includes a receiving portion 20 and a plurality of battery cells 10 located in the receiving portion 20, and the plurality of battery cells 10 are arranged side by side in the receiving portion 20.
- the accommodating part 20 can be arranged in many ways.
- the accommodating part 20 includes a housing and a cover plate provided at the housing; or, the accommodating part 20 includes side plates and end plates that are successively enclosed and connected; or, the accommodating part includes oppositely arranged The end plate and the strap surrounding the end plate and the battery cell; or, as shown in FIG. 3, the receiving portion 20 includes a side plate, an end plate and a strap.
- the battery cell 10 can be used not only in vehicles but also in other devices.
- the embodiment of the present application also provides a device that uses the battery cell 10 as a power source.
- the device can be, but is not limited to, a vehicle, a ship, or an aircraft.
- FIG. 4 is a schematic structural diagram of a battery cell 10 according to an embodiment of the present application.
- the battery cell 10 includes a housing 200 with an opening and an end cover assembly 100 covering the housing 200.
- An electrode assembly 300 is also provided in the housing 200 of the battery cell 10.
- the housing 200 is provided with electrolyte
- the end cap assembly 100 is provided with a through hole 111 used as a liquid injection port and a nail body 120 for sealing the through hole 111.
- the electrolyte can be injected into the housing 200 through the through hole 111, and the through hole 111 can be sealed through the nail body 120.
- FIG. 5 is an isometric view of an end cap assembly 100 provided by an embodiment of the present application.
- FIG. 6 is a top view of an end cap assembly 100 provided by an embodiment of the present application.
- Fig. 7 is a cross-sectional view at A-A in Fig. 6.
- the end cap assembly 100 includes: an end cap plate 110, including a through hole 111 for injecting electrolyte and a fixing portion 112 arranged around the through hole 111; a nail body 120, including
- the accommodating part for accommodating the fixing part 112 is ring-shaped and includes two inner walls spaced apart in the radial direction. The inner wall and the outer wall of the fixing part 112 are press-fitted with the two inner walls of the nail body 120 to seal the through hole. 111.
- the above-mentioned end cap assembly 100 can not only be used in the battery cell 10 to cover the opening of the housing 200 of the battery cell 10, but also can be used to cover the opening of other devices.
- the inner wall of the fixing portion 112 refers to the inner wall surface of the fixing portion 112 facing the through hole 111, and the outer wall of the fixing portion 112 refers to the outer wall surface of the fixing portion 112 away from the through hole 111.
- the accommodating portion includes an accommodating space for accommodating the fixing portion 112, and the inner wall of the accommodating portion refers to an inner wall surface of the accommodating portion facing the accommodating space.
- the end cover assembly 100 includes an end cover plate 110 and a nail body 120, the end cover plate 110 is provided with a through hole 111, and the nail body 120 is used to seal the through hole 111.
- a fixing portion 112 is provided on the outer periphery of the through hole 111, and the nail body 120 cooperates with the fixing portion 112 and the inner wall of the through hole 111 to increase the contact area between the nail body 120 and the end cover plate 110, thereby improving the sealing effect.
- the fixing portion 112 is arranged around the through hole 111 and protrudes relative to other parts of the end cover plate 110.
- the nail body 120 includes a ring-shaped receiving portion, and two inner walls of the ring-shaped receiving portion can be press-fitted with the inner wall and the outer wall of the fixing portion 112. That is to say, the ring-shaped receiving portion can provide the fixed portion 112 with a limit in two directions, so that the fixed portion 112 is balanced in force.
- the fixing portion 112 be prevented from tilting and deformation, but also the contact area of the nail body 120 and the fixing portion 112 can be increased, and the displacement of the nail body 120 along with the deformation of the top cover 110 can be avoided, and the sealing effect can be improved.
- the battery cell 10 may generate gas during use, so that the end cap assembly 100 may be convexly deformed. Since the fixing portion 112 is arranged around the through hole 111, the mating distance between the nail body 120 and the end cover plate 110 in the thickness direction thereof can be increased. When the end cap assembly 100 is deformed convexly, the transmission distance of the deformation can be increased, making it difficult for the deformation to be transmitted to the fixing portion 112, and ensuring the tightness of the nail body 120 and the fixing portion 112.
- the nail body 120 and the through hole 111 of the end cover assembly 100 are closely matched, the nail body 120 can be matched with the through hole 111 and the fixing portion 112 by interference fit, so that the nail body 120 is detachably disposed on the end cover plate 110.
- the nail body 120 can be removed to facilitate the secondary injection of the battery cell 10.
- FIG. 8 is a schematic diagram of a partially enlarged structure at I in FIG. 7
- FIG. 9 is a schematic diagram of a partially enlarged structure at I in FIG. 7 in another embodiment of the present application.
- the fixing portion 112 may directly protrude from the surface of the end cover 110.
- the fixing portion 112 protrudes from the surface of the end cover plate 110, and the nail body 120 and the fixing portion 112 cooperate, so that at least part of the nail body 120 protrudes from the surface of the end cover plate 110, which is convenient for setting the nail body 120. Perform removal or installation actions.
- the surface of the end cover plate 110 is recessed to form a sinking platform 113, and the fixing portion 112 is connected to the bottom surface 113 a of the sinking platform 113.
- the fixing portion 112 is located in the sinking platform 113, which can ensure the flatness of the outer surface of the end cover plate 110 and reduce the space occupied by the end cover assembly 100.
- the nail body 120 when the nail body 120 is sealed in the through hole 111, the nail body 120 is located in the sinking table 113, which can reduce the space occupied by the end cap assembly 100.
- the material of the nail body 120 includes one of steel, aluminum or other hard metal materials, or the material of the nail body 120 includes engineering plastics or the like.
- the nail body 120 includes a cylinder 121 and a cap 122 connected to one end of the cylinder 121.
- the cylinder 121 is used to seal the through hole 111.
- the cap 122 includes a surrounding cylinder.
- the convex portion 123 provided in the 121 makes a ring-shaped receiving portion formed between the convex portion 123 and the column 121.
- the column 121 is press-fitted with the inner wall of the fixing portion 112, and the convex portion 123 is press-fitted with the outer wall of the fixing portion 112.
- the column 121 and the convex portion 123 respectively form the two inner walls of the accommodating portion, and the column 121 and the convex portion 123 provide the fixing portion 112 with restraints in two directions, so that the fixing portion 112 is more balanced in force. , The sealing performance of the end cover assembly 100 can be improved.
- the end cap assembly 100 further includes a sealing element 130, which is disposed between the nail body 120 and the fixing portion 112 to realize the nail body 120 and the fixing portion 112. 112's press fit.
- the sealing member 130 is provided so that the nail body 120 and the fixing portion 112 can be interference fit, and the sealing performance of the end cap assembly 100 is improved.
- the sealing member 130 includes a first sealing member 130a, which is sleeved between the cylinder 121 and the inner wall of the fixing portion 112, so that the cylinder 121 It fits tightly with the fixing portion 112.
- first sealing member 130a By providing the first sealing member 130a, the cylinder 121 and the fixing portion 112 can be interference fit, and the sealing performance of the end cover assembly 100 is improved.
- the column 121 and/or the fixing portion 112 is provided with a first accommodating groove (not shown in the figure), so that the first sealing member 130a can be located in the first accommodating groove.
- the first sealing element 130a may be located in the first accommodating groove, and the first sealing element 130a can be provided with a limit through the first accommodating groove, so as to prevent the first sealing element 130a from being misaligned and ensure the first sealing The stability of the relative position of the piece 130a, the fixing portion 112 and/or the nail body 120.
- the sealing member 130 further includes a second sealing member 130b, which is sleeved between the outer wall of the fixing portion 112 and the convex portion 123, so that the convex portion 123 and the fixing portion 112 are closely matched.
- the convex portion 123 and/or the fixing portion 112 is provided with a second accommodating groove (not shown in the figure), so that the second sealing member 130b can be located in the second accommodating groove.
- the second sealing element 130b may be located in the second accommodating groove, and the second sealing element 130b can be provided with a limit through the second accommodating groove, preventing the second sealing element 130b from being misaligned and ensuring the second sealing The stability of the relative position of the piece 130b, the fixing portion 112 and/or the nail body 120.
- the sealing member 130 includes a first sealing member 130a and a second sealing member 130b, so that the cylinder 121 and the fixing portion 112 can be tightly matched, and the convex portion 123 and the fixing portion 112 can also be tightly matched to ensure the fixing portion 112 is balanced in force and improves the sealing performance of the end cap assembly 100.
- the shape of the sealing member 130 is not limited. In some embodiments, please refer to FIG. 9 continuously.
- the sealing member 130 includes an annular wall portion 131, and the cross section of the annular wall portion 131 is circular.
- the cross section of the annular wall portion 131 is a surface perpendicular to the radial direction of the seal 130. In these embodiments, the annular wall portion 131 with a circular cross-section makes the nail body 120 less resistant when it is pressed into the through hole 111, and is easy to assemble.
- the cross section of the annular wall portion 131 is rectangular, so that the sealing member 130 is connected to the fixing portion 112 and/or the nail body 120 in surface-to-surface contact.
- the surface-to-surface contact between the sealing member 130 and the fixing portion 112 and/or the nail body 120 can increase the contact area between the sealing member 130 and the fixing portion 112 and/or the nail body 120 and improve the sealing performance of the end cover assembly 100.
- the cross-section of the first sealing member 130a and the cross-sectional shape of the second sealing member 130b may be the same, that is, the first sealing member 130a and the second sealing member 130b
- the cross-sections are round or rectangular.
- the cross-sectional shapes of the first sealing member 130a and the second sealing member 130b are different, that is, the cross-section of one of the first sealing member 130a and the second sealing member 130b is circular, and the other is rectangular.
- the material of the sealing member 130 may include at least one of rubber and foam. As long as the sealing element 130 has a certain degree of elasticity, so that the nail body 120 and the fixing portion 112 can be interference fit through the sealing element 130.
- the end cover assembly 100 further includes a locking member 140, the locking member 140 is a ring structure, and the locking member 140 is configured to be locked to the end cover plate 110 In addition, so that the nail body 120 and the fixing portion 112 are press-fitted.
- the nail body 120 can apply a force to the nail body 120 and the fixing portion 112 to ensure the tightness of the nail body 120 and the fixing portion 112 with each other.
- the locking member 140 has a wall 141 and a hollow space enclosed by the wall 141.
- the size of the hollow space is adjustable so that the locking member 140 can be locked. Tighten the nail body 120 and the fixing portion 112.
- the wall portion 141 has elasticity, and the nail body 120 and the fixing portion 112 are locked by the elastic deformation of the wall portion 141.
- the wall 141 is provided with a notch 142 communicating with the hollow space, so that the locking portion 140 is not a closed ring, and the nail body 120 and the fixing portion 112 are locked by adjusting the size of the notch 142.
- the wall portion 141 has a connecting portion 143 at both ends of the notch 142, the connecting portion 143 has through holes therethrough, and the two through holes at both ends of the notch 142 can be connected to each other by an intermediate connector.
- the end cover assembly 100 further includes a sol, which is disposed on the end cover plate 110 and used to connect the nail body 120 and the end cover plate 110.
- the sol can cover the nail body 120, which can further ensure the stability of the relative position between the nail body 120 and the end cover plate 110.
- the soluble soluble material is made of, for example, a fusible material.
- FIG. 20 is a liquid injection method of the battery cell 10 according to the second embodiment of the present application.
- the battery cell 10 may be the battery cell 10 in any of the above embodiments.
- the liquid injection method includes:
- Step S1 Inject electrolyte through the through hole on the end cover plate of the end cover assembly of the battery cell.
- Step S2 sealing the nail body in the through hole, so that the fixing part is accommodated in the accommodating part having a ring shape on the nail body, and the inner and outer side walls of the fixing part are press-fitted with the inner wall of the accommodating part.
- the electrolyte is first injected into the battery cell 10 through the through hole 111, and then the nail body 120 is sealed in the through hole 111, and the inner and outer side walls of the fixing portion 112 are in contact with the inner wall of the receiving portion.
- the ring-shaped receiving portion can provide the fixing portion 112 with a limit in two directions, so that the fixing portion 112 is balanced in force, which can not only prevent the fixing portion 112 from tilting and deform, but also increase the contact between the nail body 120 and the fixing portion 112 Area to improve the sealing effect.
- the liquid injection method further includes: pulling the nail body 120 out of the through hole 111, injecting the electrolyte through the through hole 111, and The nail body 120 is sealed in the through hole 111 again. Furthermore, the secondary injection of the battery cell 10 is realized.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Filling, Topping-Up Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (15)
- 一种用于电池单体的端盖组件,包括:端盖板,包括用于注入电解液的通孔及环绕所述通孔设置的固定部;钉体,包括用于***述固定部的容纳部,所述容纳部呈环状并包括在其径向上分隔设置的两个内壁,所述固定部的内壁及外壁分别与所述容纳部的所述两个内壁抵压配合,以密封所述通孔。
- 根据权利要求1所述的端盖组件,其中,所述钉体包括用于密封所述通孔的柱体及连接于所述柱体一端的盖帽,所述盖帽包括环绕所述柱体设置的凸部,所述凸部和所述柱体围合形成所述容纳部,且所述柱体与所述固定部的内壁抵压配合,所述凸部与所述固定部的外壁抵压配合。
- 根据权利要求2所述的端盖组件,其中,所述端盖组件还包括密封件,所述密封件设置于所述钉体和所述固定部之间,以实现所述钉体与所述固定部的抵压配合。
- 根据权利要求3所述的端盖组件,其中,所述密封件包括第一密封件,套设于所述柱体和所述固定部内壁之间,所述柱体和/或所述固定部内壁上设置有第一容置槽,以使所述第一密封件位于所述第一容置槽。
- 根据权利要求3或4所述的端盖组件,其中,所述密封件包括第二密封件,套设于所述固定部外壁和所述凸部之间,所述固定部外壁和/或所述凸部上设置有第二容置槽,以使所述第二密封件位于所述第二容置槽。
- 根据权利要求3-5任一项所述的端盖组件,其中,所述密封件(130)包括环状壁部;所述环状壁部的截面呈圆形;或者,所述环状壁部的截面呈矩形,以使所述密封件与所述固定部和/或所述钉体面面接触设置。
- 根据权利要求2-6任一项所述的端盖组件,其中,所述端盖组件还包括锁紧部件,所述锁紧部件为环状结构,被配置为套设并锁紧于所述盖帽外,以使得所述钉体与所述固定部抵压配合。
- 根据权利要求7所述的端盖组件,其中,所述锁紧部件具有壁部及由所述壁部围合形成的中空空间,所述中空空间的尺寸可调。
- 根据权利要求8所述的端盖组件,其中,所述壁部具有弹性;或者,所述壁部上开设有和所述中空空间连通的豁口,以通过调节所述豁口的大小来锁紧所述钉体与所述固定部。
- 根据权利要求9所述的端盖组件,其中,所述壁部上开设有和所述中空空间连通的豁口,所述壁部在豁口的两端具有连接部,所述连接部具有贯穿的贯穿孔,所述豁口两端的两个所述贯穿孔可以通过中间连接件相互连接。
- 根据权利要求1-10任一项所述的端盖组件,其中,所述固定部凸出于所述端盖板的表面设置;或者,所述端盖板的表面凹陷形成沉台,所述固定部连接于所述沉台的底面。
- 一种电池单体,包括:壳体,具有开口;权利要求1-11任一项所述的端盖组件,用于封闭所述开口。
- 一种电池组,包括:权利要求2所述的电池单体;箱体,用于***述电池单体。
- 一种装置,包括权利要求12所述的电池单体,所述电池单体用于提供电能。
- 一种电池单体的注液方法,所述方法包括:通过电池单体的端盖组件中端盖板上的通孔注入电解液;将钉体密封于注液孔内,使得固定部容纳于所述钉体的上呈环状的容纳部内,且所述固定部的内侧壁及外侧壁与所述容纳部的内壁抵压配合。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21809126.2A EP4030553A4 (en) | 2020-05-19 | 2021-04-26 | END COVER ASSEMBLY, BATTERY CELL, BATTERY PACK, DEVICE, AND LIQUID INJECTION METHOD |
KR1020227023192A KR20220113748A (ko) | 2020-05-19 | 2021-04-26 | 엔드캡 어셈블리, 전지 셀, 전지 팩, 장치 및 액체 주입 방법 |
JP2022541653A JP7446437B2 (ja) | 2020-05-19 | 2021-04-26 | エンドカバー組立体、電池セル、電池パック、装置及び液体注入方法 |
US17/721,384 US20220238945A1 (en) | 2020-05-19 | 2022-04-15 | End cover assembly, battery cell, battery pack, apparatus and liquid-injection method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010426530.8A CN112332044A (zh) | 2020-05-19 | 2020-05-19 | 端盖组件、电池单体、电池组、装置及注液方法 |
CN202010426530.8 | 2020-05-19 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/721,384 Continuation US20220238945A1 (en) | 2020-05-19 | 2022-04-15 | End cover assembly, battery cell, battery pack, apparatus and liquid-injection method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021233080A1 true WO2021233080A1 (zh) | 2021-11-25 |
Family
ID=74304140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2021/089810 WO2021233080A1 (zh) | 2020-05-19 | 2021-04-26 | 端盖组件、电池单体、电池组、装置及注液方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220238945A1 (zh) |
EP (1) | EP4030553A4 (zh) |
JP (1) | JP7446437B2 (zh) |
KR (1) | KR20220113748A (zh) |
CN (1) | CN112332044A (zh) |
WO (1) | WO2021233080A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4276985A1 (en) * | 2022-05-10 | 2023-11-15 | Prime Planet Energy & Solutions, Inc. | Battery |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112332044A (zh) * | 2020-05-19 | 2021-02-05 | 宁德时代新能源科技股份有限公司 | 端盖组件、电池单体、电池组、装置及注液方法 |
CN111384357B (zh) * | 2020-05-29 | 2020-09-29 | 江苏时代新能源科技有限公司 | 用于电池的顶盖组件、电池和使用电池作为电源的装置 |
CN217334363U (zh) * | 2022-06-20 | 2022-08-30 | 宁德时代新能源科技股份有限公司 | 端盖组件、电池单体、电池及用电装置 |
CN115207582B (zh) * | 2022-07-20 | 2024-06-11 | 欣旺达动力科技股份有限公司 | 电池壳体及动力电池 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102044641A (zh) * | 2009-10-19 | 2011-05-04 | 三星Sdi株式会社 | 密封单元、盖板及其制造方法、二次电池及其制造方法 |
CN102270757A (zh) * | 2010-06-03 | 2011-12-07 | 三星Sdi株式会社 | 可再充电电池、向其中注入电解质溶液的方法和电池组件 |
US20120107653A1 (en) * | 2010-11-02 | 2012-05-03 | Minhyung Guen | Secondary battery |
CN102823027A (zh) * | 2011-04-01 | 2012-12-12 | 丰田自动车株式会社 | 蓄电装置 |
CN204271180U (zh) * | 2014-11-27 | 2015-04-15 | 河北银隆新能源有限公司 | 锂离子电池注液口结构及具有其的圆柱形锂离子电池 |
CN206546862U (zh) * | 2017-03-06 | 2017-10-10 | 东莞超霸电池有限公司 | 一种密闭型高密度二次镍氢电池 |
CN107359304A (zh) * | 2016-05-10 | 2017-11-17 | 宁德时代新能源科技股份有限公司 | 锂离子电池注液孔密封结构 |
CN112332044A (zh) * | 2020-05-19 | 2021-02-05 | 宁德时代新能源科技股份有限公司 | 端盖组件、电池单体、电池组、装置及注液方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005190776A (ja) | 2003-12-25 | 2005-07-14 | Nec Tokin Tochigi Ltd | 密閉型電池 |
KR100865404B1 (ko) | 2007-09-14 | 2008-10-24 | 삼성에스디아이 주식회사 | 이차전지 |
CN202585544U (zh) * | 2012-03-06 | 2012-12-05 | 宁德新能源科技有限公司 | 动力电池及其顶盖 |
CN102738507B (zh) * | 2012-07-24 | 2014-07-30 | 上海航天电源技术有限责任公司 | 一种全密封耐腐蚀的焊接一体化锂离子电池 |
CN202797106U (zh) * | 2012-07-30 | 2013-03-13 | 比亚迪股份有限公司 | 一种锂离子电池密封组件 |
US9147865B2 (en) * | 2012-09-06 | 2015-09-29 | Johnson Controls Technology Llc | System and method for closing a battery fill hole |
CN205645909U (zh) * | 2016-05-24 | 2016-10-12 | 宁德时代新能源科技股份有限公司 | 电池顶盖组件及含该组件的电池 |
CN108150587A (zh) * | 2016-12-02 | 2018-06-12 | 株洲时代新材料科技股份有限公司 | 一种轨道交通用液压衬套的注液方法 |
CN208256801U (zh) * | 2018-06-19 | 2018-12-18 | 合肥国轩高科动力能源有限公司 | 一种方形锂电池电解液注液孔密封结构 |
CN208674182U (zh) * | 2018-08-24 | 2019-03-29 | 比亚迪股份有限公司 | 电池盖板组件、单体电池、电池模组以及电动汽车 |
CN209150179U (zh) * | 2018-11-02 | 2019-07-23 | 宁德时代新能源科技股份有限公司 | 二次电池 |
-
2020
- 2020-05-19 CN CN202010426530.8A patent/CN112332044A/zh active Pending
-
2021
- 2021-04-26 WO PCT/CN2021/089810 patent/WO2021233080A1/zh unknown
- 2021-04-26 EP EP21809126.2A patent/EP4030553A4/en active Pending
- 2021-04-26 KR KR1020227023192A patent/KR20220113748A/ko not_active Application Discontinuation
- 2021-04-26 JP JP2022541653A patent/JP7446437B2/ja active Active
-
2022
- 2022-04-15 US US17/721,384 patent/US20220238945A1/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102044641A (zh) * | 2009-10-19 | 2011-05-04 | 三星Sdi株式会社 | 密封单元、盖板及其制造方法、二次电池及其制造方法 |
CN102270757A (zh) * | 2010-06-03 | 2011-12-07 | 三星Sdi株式会社 | 可再充电电池、向其中注入电解质溶液的方法和电池组件 |
US20120107653A1 (en) * | 2010-11-02 | 2012-05-03 | Minhyung Guen | Secondary battery |
CN102823027A (zh) * | 2011-04-01 | 2012-12-12 | 丰田自动车株式会社 | 蓄电装置 |
CN204271180U (zh) * | 2014-11-27 | 2015-04-15 | 河北银隆新能源有限公司 | 锂离子电池注液口结构及具有其的圆柱形锂离子电池 |
CN107359304A (zh) * | 2016-05-10 | 2017-11-17 | 宁德时代新能源科技股份有限公司 | 锂离子电池注液孔密封结构 |
CN206546862U (zh) * | 2017-03-06 | 2017-10-10 | 东莞超霸电池有限公司 | 一种密闭型高密度二次镍氢电池 |
CN112332044A (zh) * | 2020-05-19 | 2021-02-05 | 宁德时代新能源科技股份有限公司 | 端盖组件、电池单体、电池组、装置及注液方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4276985A1 (en) * | 2022-05-10 | 2023-11-15 | Prime Planet Energy & Solutions, Inc. | Battery |
Also Published As
Publication number | Publication date |
---|---|
JP2023510527A (ja) | 2023-03-14 |
US20220238945A1 (en) | 2022-07-28 |
JP7446437B2 (ja) | 2024-03-08 |
KR20220113748A (ko) | 2022-08-16 |
EP4030553A1 (en) | 2022-07-20 |
CN112332044A (zh) | 2021-02-05 |
EP4030553A4 (en) | 2023-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021233080A1 (zh) | 端盖组件、电池单体、电池组、装置及注液方法 | |
EP2541650B1 (en) | Rechargeable battery having improved gasket and terminal structure | |
US20110165451A1 (en) | Battery pack | |
CN106450407B (zh) | 二次电池 | |
EP4044329B1 (en) | Battery box body, battery, electric device, and method and device for manufacturing box body | |
US12015162B2 (en) | Cover plate assembly, battery, electricity-consuming apparatus and method for sealing through hole | |
US8822050B2 (en) | Electric storage apparatus | |
US20230207946A1 (en) | Case, battery, power consuming device, and method for assembling case | |
US11588203B2 (en) | Non-aqueous electrolyte secondary battery | |
WO2023174047A1 (zh) | 电池单体、电池以及用电装置 | |
CN216213729U (zh) | 电池单体、电池及用电设备 | |
WO2023060519A1 (zh) | 容纳装置、电池、用电设备、电池的制造设备及方法 | |
WO2023186034A1 (zh) | 端盖、电池单体、电池及用电设备 | |
WO2022206176A1 (zh) | 一种电池单体、电池及使用电池单体作为电源的装置 | |
WO2024094179A1 (zh) | 电池的端盖组件、电池单体、储能装置及用电设备 | |
WO2023246152A1 (zh) | 电池单体、电池及用电装置 | |
US11777184B2 (en) | End cover assembly, secondary battery, battery module, apparatus, liquid-injection method and device | |
CN216903471U (zh) | 连接器、电池和用电装置 | |
WO2023221095A1 (zh) | 电池端盖组件、电池单体、电池及用电设备 | |
KR20230048005A (ko) | 전지 셀 및 그의 제조 방법, 제조 시스템, 전지 및 전기 장치 | |
CN116249652A (zh) | 连接部件、电池单体、电池及用电设备 | |
WO2024016275A1 (zh) | 电池单体、电池及用电设备 | |
KR20060037624A (ko) | 이차 전지와 이의 캡 조립체 | |
WO2023092457A1 (zh) | 电池的箱体、电池、用电装置、制备电池的方法和装置 | |
CN219739105U (zh) | 电池单体的壳体组件、电池单体、电池及用电设备 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21809126 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2021809126 Country of ref document: EP Effective date: 20220413 |
|
ENP | Entry into the national phase |
Ref document number: 2022541653 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20227023192 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |