Rechargeable battery structure provided with oscillator

Abstract

The invention discloses a rechargeable battery structure provided with an oscillator. The rechargeable battery structure comprises a shell and at least one unit cell, the shell is arranged on the outer side of the combined unit battery cells, and the oscillator is arranged in the inner side of the shell or externally assembled on the outer side surface of the shell; the oscillator comprises two conducting strips and at least one layer of oscillation film, and piezoelectric ceramic particles are laid on the two side faces of the oscillation film. The oscillation films are arranged in a stacked mode, and the two conducting strips are clamped on the two sides of the oscillation films arranged in a stacked mode respectively to form a main body oscillation piece. And an insulating outer frame is arranged at the edge of the outer side of the main body oscillator plate. According to the rechargeable battery structure, the oscillator is arranged on the inner side or the outer side of the shell, the oscillator is driven to vibrate by introducing direct-current pulse current, metal ion crystals on the diaphragm are broken through mechanical force generated by the oscillator, and crystal nucleuses can be effectively prevented from being generated on the inner side of the battery pole piece of the rechargeable battery structure; the charging efficiency of the rechargeable battery is improved; and the service life is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of rechargeable batteries, and particularly to a rechargeable battery structure provided with an oscillator. Background Art

[0002] With the rapid development of new energy technologies, rechargeable batteries are widely used in various electrical appliances. In the prior art methods, in order to increase the strength of the separator inside the battery electrode sheet and the ion migration efficiency, alumina (Al2O3) is usually doped in the separator or alumina particles are laid on the surface of the separator. However, in the actual application process, in the rechargeable battery using the traditional separator, after repeated charging and discharging, dendrites will grow due to the deposition of metal ions caused by the change of the electrochemical properties of the metal ions on the electrode sheet. After the dendrites are generated, the Coulomb efficiency of the battery will be severely reduced, and the separator provided inside the electrode sheet will be damaged, that is, the charging efficiency and the effective charging capacity of the rechargeable battery are affected; at the same time, after the dendrites are generated, the charging heat generation will be significantly increased, thus seriously affecting the charging safety of the battery. Therefore, the rechargeable batteries in the prior art methods have the problems of easy deposition of metal ions and generation of dendrites. Summary of the Invention

[0003] A rechargeable battery structure provided with an oscillator according to an embodiment of the present invention aims to solve the problems of easy deposition of metal ions and generation of dendrites existing in the rechargeable batteries in the prior art.

[0004] The present invention discloses a rechargeable battery structure provided with an oscillator, wherein the rechargeable battery structure includes a housing and at least one unit battery cell; the unit battery cells are connected in parallel and / or in series; the unit battery cell includes a negative electrode sheet, a positive electrode sheet, and a separator disposed between the negative electrode sheet and the positive electrode sheet;

[0005] The housing is disposed outside the combined unit battery cells, and the housing includes a first side plate, a second side plate, a first enclosing plate, and a second enclosing plate. The two ends of the first enclosing plate are respectively abutted against the two ends of the second enclosing plate to form an annular enclosing assembly; the first side plate and the second side plate are respectively assembled at the two open ends of the annular enclosing assembly, and the combined unit battery cells are assembled in the internal cavity formed by enclosing the first side plate, the second side plate, the first enclosing plate, and the second enclosing plate;

[0006] The oscillator is built in the inner side of the housing or externally assembled on the outer side surface of the housing;

[0007] The oscillator includes two conductive sheets and at least one layer of oscillating film, and piezoelectric ceramic particles are laid on both sides of the oscillating film; the oscillating films are stacked, and the two conductive sheets are respectively clamped on both sides of the stacked oscillating films to form a main oscillating sheet; an insulating outer frame is arranged at the outer edge of the main oscillating sheet.

[0008] The charging battery structure provided with the oscillator, wherein the main oscillating sheet is arranged at the gap between the annular enclosing assembly and the unit battery cells arranged in combination, or the main oscillating sheet is respectively arranged at the gap between the first side plate and the unit battery cells and the gap between the second side plate and the unit battery cells.

[0009] The charging battery structure provided with the oscillator, wherein a flexible buffer gasket is arranged between the main oscillating sheet and the inner side wall of the outer shell.

[0010] The charging battery structure provided with the oscillator, wherein the main oscillating sheet is attached to the outer side surface of the annular enclosing assembly, or the main oscillating sheet is respectively attached to the outer side surfaces of the first side plate and the second side plate.

[0011] The charging battery structure provided with the oscillator, wherein the positive electrode plate and the negative electrode plate of the unit battery cells are respectively connected to a positive charging wire and a negative charging wire;

[0012] The two conductive sheets of the oscillator are respectively connected to the positive charging wire and the negative charging wire, or the two conductive sheets of the oscillator are respectively connected to two independent oscillating conducting wires.

[0013] The charging battery structure provided with the oscillator, wherein the piezoelectric ceramic particles are lead zirconate titanate ceramic particles.

[0014] The charging battery structure provided with the oscillator, wherein the particle size of the piezoelectric ceramic particles is 0.5 - 25 μm.

[0015] The charging battery structure provided with the oscillator, wherein the oscillator includes at least two layers of oscillating films, and the particle size of the piezoelectric ceramic particles on the oscillating film close to the unit battery cells is larger than that of the piezoelectric ceramic particles on the oscillating film far from the unit battery cells.

[0016] The charging battery structure provided with the oscillator, wherein the mass fraction ratio of Pb, Ge, Ni, Ba, Zr, Sn and Ti in the lead zirconate titanate ceramic particles is (7.5 - 9.5):(0.2 - 0.5):(0.3 - 0.8):(0.6 - 1.8):(4.6 - 5):(3.2 - 3.8):(0.6 - 1.3).

[0017] The described rechargeable battery structure with an oscillator, wherein the oscillating film is formed by laminating a cross-linked polytetrafluoroethylene film and a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] film; the thickness of the oscillating film is 20 - 140 μm.

[0018] A rechargeable battery structure with an oscillator disclosed by the present invention, the rechargeable battery structure includes a housing and at least one unit battery cell; the housing is disposed outside the unit battery cells arranged in combination, the oscillator is built inside the housing or externally assembled on the outer surface of the housing; the oscillator includes two conductive sheets and at least one layer of oscillating film, piezoelectric ceramic particles are laid on both sides of the oscillating film; each oscillating film is stacked, and the two conductive sheets are respectively clamped on both sides of the stacked oscillating films to form a main oscillating sheet; an insulating outer frame is disposed at the outer edge of the main oscillating sheet. For the above rechargeable battery structure, by arranging the oscillator inside or outside the housing and driving the oscillator to generate vibration by passing a DC pulsed current, and then breaking the metal ion crystals on the diaphragm by the mechanical force generated by the oscillator, it can effectively prevent the generation of crystal nuclei inside the battery electrode plate of the rechargeable battery structure, improve the charging efficiency of the rechargeable battery, and greatly extend the service life of the rechargeable battery. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is the overall structure diagram of the rechargeable battery structure with an oscillator provided by the embodiment of the present invention;

[0021] Figure 2 It is the exploded structure diagram of the rechargeable battery structure with an oscillator provided by the embodiment of the present invention;

[0022] Figure 3 It is another exploded structure diagram of the rechargeable battery structure with an oscillator provided by the embodiment of the present invention;

[0023] Figure 4 It is the sectional structure diagram of the rechargeable battery structure with an oscillator provided by the embodiment of the present invention;

[0024] Figure 5 It is another sectional structure diagram of the rechargeable battery structure with an oscillator provided by the embodiment of the present invention;

[0025] Figure 6This is a partial cross-sectional structure diagram of the rechargeable battery structure with an oscillator provided by an embodiment of the present invention;

[0026] Figure 7 This is a cross-sectional structure diagram of the oscillating film paved with piezoelectric ceramic particles provided by an embodiment of the present invention;

[0027] Figure 8 This is a cross-sectional structure diagram of a unit cell provided by an embodiment of the present invention.

[0028] Reference numerals in the drawings: 1, unit cell; 11, negative electrode tab; 111, negative current collector; 112, negative electrode material layer; 12, positive electrode tab; 121, positive current collector; 122, positive electrode material layer; 13, separator; 2, outer shell; 21, first side plate; 22, second side plate; 23, first enclosing plate; 24, second enclosing plate; 25, connecting rod; 26, external electrode; 211, first groove; 30, main oscillating piece; 31, conductive sheet; 3, oscillating film; 32, piezoelectric ceramic particles; 33, insulating outer frame; 34, flexible buffer gasket; 301, crosslinked polytetrafluoroethylene film; 302, poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] film. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0031] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0032] It should be further understood that the term " / and / " used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0033] The present invention discloses a rechargeable battery structure provided with an oscillator, as Figure 1-3 shown. The rechargeable battery structure includes a housing 2 and at least one unit battery cell 1; the unit battery cells 1 are connected in parallel and / or in series; the unit battery cell 1 includes a negative electrode tab 11, a positive electrode tab 12, and a separator 13 disposed between the negative electrode tab 11 and the positive electrode tab 12; the housing 2 is disposed outside the combined unit battery cells 1, and the housing 2 includes a first side plate 21, a second side plate 22, a first enclosing plate 23, and a second enclosing plate 24. The two ends of the first enclosing plate 23 are respectively abutted against the two ends of the second enclosing plate 24 to form an annular enclosing assembly; the first side plate 21 and the second side plate 22 are respectively assembled at the two open ends of the annular enclosing assembly, and the combined unit battery cells 1 are assembled in the inner cavity formed by the first side plate 21, the second side plate 22, the first enclosing plate 23, and the second enclosing plate 24; the oscillator is built in the inner side of the housing 2 or externally assembled on the outer side surface of the housing 2; the oscillator includes two conductive sheets 31 and at least one layer of oscillation film 3, and piezoelectric ceramic particles 32 are laid on both side surfaces of the oscillation film 3; the oscillation films 3 are stacked, and the two conductive sheets 31 are respectively clamped on both sides of the stacked oscillation films 3 to form a main oscillation sheet 30; an insulating outer frame 33 is disposed at the outer edge of the main oscillation sheet 30.

[0034] Among them, the unit battery cell 1 includes a negative electrode tab 11, a positive electrode tab 12, and a separator 13 disposed between the negative electrode tab 11 and the positive electrode tab 12. The area where the separator 13 is located is filled with electrolyte (not shown in the figure). To improve the circulation efficiency of metal ions in the electrolyte, separator holes 13 can be provided on the separator 13, and the separator holes 13 can efficiently circulate the metal ions in the electrolyte, thereby exerting the charge and discharge performance of the battery. In the specific application process, a plurality of unit battery cells 1 can be combined to form a rechargeable battery structure with high power and large capacity. For example, the unit battery cells 1 can be connected in series or in parallel, or after a certain number of unit battery cells 1 are connected in series, the serially connected unit battery cells 1 are then connected in parallel.

[0035] In a specific embodiment, as Figure 8As shown, the positive electrode plate 12 includes a positive current collector 121 and a positive electrode material layer 122 provided on the positive current collector 121. The positive electrode material layer 122 is disposed closely on one side of the separator 13; the negative electrode plate 11 includes a negative current collector 111 and a negative electrode material layer 112 provided on the negative current collector 111. The negative electrode material layer 112 is disposed closely on the other side of the separator 13. Specifically, the positive current collector 121 and the negative current collector 111 are single-element metal sheets or alloy metal sheets. Among them, the negative electrode material layer 112 contains a lithium-silicon composite active material; the positive electrode material layer 122 also contains a lithium ion salt.

[0036] Among them, the positive current collector 121 and the negative current collector 111 can be single-element metal sheets, such as copper metal sheets, aluminum metal sheets or silver metal sheets, etc. The positive current collector 121 and the negative current collector 111 can also be alloy metal sheets, such as aluminum alloy metal sheets, silver alloy metal sheets, etc. The negative electrode material layer 112 contains a lithium-silicon composite active material, and optionally a conductive agent and a binder, etc. The lithium-silicon composite active material can be a composite material composed of lithium metal and lithium-silicon alloy Li 4.4Si. The positive electrode material layer 122 contains a positive electrode active material, and optionally a conductive agent and a binder, etc. Among them, the positive electrode active material is a lithium ion salt, and the lithium ion salt can be at least one of lithium iron phosphate, lithium manganese phosphate, lithium manganese iron phosphate, lithium vanadium phosphate, lithium cobalt phosphate, lithium cobaltate, lithium manganate, lithium nickel manganate, lithium nickel cobalt manganate (NCM), lithium nickel cobalt aluminate (NCA), etc. The charging battery structure obtained at this time is a lithium ion charging battery structure.

[0037] The oscillator includes two conductive sheets 31 and at least one layer of oscillating film 3. The conductive sheets 31 are clamped on both sides of the oscillating film 3, and the oscillating films 3 are stacked. The oscillator includes at least one main oscillating sheet 30. To improve the working stability of the oscillating film 3, an insulating outer frame 33 can be provided at the outer edge of the main oscillating sheet 30 formed by stacking the oscillating film 3 and the conductive sheet 31. For example, insulating silicone can be applied to the outer edge of the main oscillating sheet 30 to form the insulating outer frame 33. Piezoelectric ceramic particles 32 are laid on the surface layers of both sides of the oscillating film. A DC pulse current can be output to the conductive sheet 31. Then, the oscillating film 3 with piezoelectric ceramic particles 32 generates reciprocating vibrations with corresponding frequencies according to the pulse frequency of the DC pulse current, thereby generating mechanical vibrations. By conducting the mechanical vibrations to each unit battery cell 1 closely attached to the oscillator, the metal ion crystals on the separator 13 in the unit battery cell 1 are broken and crystallized. Therefore, by setting the oscillator composed of the oscillating film 3 with piezoelectric ceramic particles 32 and combining with the DC pulse current, the generation of crystal nuclei can be effectively prevented, the harm of dendrite growth can be eliminated, and the safety of the charging and discharging of the rechargeable battery structure can be improved. At the same time, since the metal ion crystals on the separator 13 are broken by mechanical force, the generation of crystal nuclei inside the battery electrode plate of the rechargeable battery structure can be effectively prevented, the charging efficiency of the rechargeable battery is improved, and the service life of the rechargeable battery is greatly extended. The conductive sheet 31 can generate a balanced electric field on both sides of the oscillating film 3, so that the mechanical vibration intensity generated at each place of the oscillating film 3 is equal, thereby improving the balance of the mechanical vibration intensity generated by the oscillating film 3.

[0038] Among them, the oscillator can be assembled inside the housing 2 or on the outer side surface of the housing 2. The housing 2 includes a first side plate 21, a second side plate 22, a first enclosing plate 23 and a second enclosing plate 24. The two ends of the first enclosing plate 23 are respectively abutted against the two ends of the second enclosing plate 24 to form an annular enclosing assembly. The first enclosing plate 23 and the second enclosing plate 24 can both be set as a "U" - shaped structure or a "[" - shaped structure. The battery is assembled inside the annular enclosing assembly formed by the first enclosing plate 23 and the second enclosing plate 24. The first side plate 21 and the second side plate 22 are respectively assembled at the two open ends of the annular enclosing assembly to seal the two open ends of the annular enclosing assembly. Further, a first groove 211 adapted to the annular enclosing assembly can be provided on the side surface of the first enclosing plate 23 facing the unit cell 1, and a second groove adapted to the annular enclosing assembly can also be provided on the side surface of the second enclosing plate 24 facing the unit cell 1. Then, the two ends of the annular enclosing assembly can be respectively embedded into the first groove 211 and the second groove (not shown in the figure) to improve the fastening of the combination and assembly of the first side plate 21 and the second side plate 22 with the annular enclosing assembly. When the oscillator is arranged inside the housing 2, a closed space containing the oscillator and the unit cell 1 can be formed through the housing 2, so that the oscillator can efficiently conduct mechanical vibration to each unit cell 1 and improve the vibration balance of the unit cell 1. When the oscillator is arranged outside the housing 2, the mechanical vibration generated by the oscillator can be conducted as a whole to each unit cell 1 arranged in the internal closed space through the housing 2, which can also improve the vibration balance of the unit cell 1. As Figure 6 shown, the end of the first side plate 21 in contact with the second side plate 22 can be set as a notch (or a protrusion), and the end of the second side plate 22 in contact with the first side plate 21 can be set as a protrusion (or a notch). Then, by embedding the protrusion into the groove, the tightness of the combined connection between the first side plate 21 and the second side plate 22 can be further improved, and it can be avoided that the combined first side plate 21 and second side plate 22 are displaced or cracked due to mechanical vibration. The two ends of the first side plate 21 and the second side plate 22 in contact can also be further set as mortise - and - tenon connections, so as to further improve the tightness of the combined connection between the first side plate 21 and the second side plate 22.

[0039] The connecting rod 25 can sequentially pass through the fixing through - holes provided on the first side plate 21 and the fixing through - holes provided on the second side plate 22, and the two ends of the connecting rod are fastened by bolts. Multiple fixing through - holes can be provided at different positions on the first side plate 21, and correspondingly, multiple fixing through - holes can be provided at different positions on the second side plate 22 corresponding to the first side plate 21. The specific structure is as Figures 1 to 3 shown.

[0040] In a more specific embodiment, the main body oscillating piece 30 is disposed at the gap between the annular enclosure assembly and the assembled unit battery cell 1, or the main body oscillating piece 30 is disposed at the gap between the first side plate 21 and the unit battery cell 1 and at the gap between the second side plate 22 and the unit battery cell 1. Specifically, a flexible buffer pad 34 is disposed between the main body oscillating piece 30 and the inner side wall of the housing 2.

[0041] The oscillator can be mounted in the housing 2, such as Figure 2 and Figure 4 In the structure shown, the main oscillating plate 30 in the oscillator is arranged around the periphery of the annular enclosure assembly, that is, the main oscillating plate 30 is located in the gap between the annular enclosure assembly and the assembled unit battery cell 1; Figure 3 In the structure shown, the main oscillating plate 30 in the oscillator is attached to the gap between the outermost unit cell 1 and the first side plate 21 and the gap between the outermost unit cell 1 and the second side plate 22. Further, the oscillator also includes a flexible buffer pad 34. In order to make the vibration generated by the main oscillating plate 30 mainly act on the unit cell 1 arranged inside, a flexible buffer pad 34 can be provided between the main oscillating plate 30 and the inner side wall of the housing 2. The specific structure is as follows: Figure 6 then the flexible buffer pad 34 can be used to buffer the vibration generated by the main oscillation plate 30, to prevent the vibration generated by the main oscillation plate 30 from causing the entire housing 2 to vibrate, thereby improving the overall working stability and reliability of the rechargeable battery structure of the oscillator.

[0042] In a more specific embodiment, the main oscillating plate 30 is attached to the outer side surface of the annular enclosure assembly, or the main oscillating plate 30 is attached to the outer side surfaces of the first side plate 21 and the second side plate 22 respectively.

[0043] Further, such as Figure 5 As shown, the main body oscillating plate 30 can be attached to the outer side of the annular enclosure assembly, and the main body oscillating plate 30 is wrapped and arranged on the outer side of the annular enclosure assembly in a fully enclosed or semi-enclosed form. Alternatively, the main body oscillating plate 30 can be attached to the outer side of the first side plate 21 and the second side plate 22 respectively.

[0044] In a more specific embodiment, the positive electrode plate 12 and the negative electrode plate 11 of the unit battery cell 1 are respectively connected to the positive charging line and the negative charging line; the two conductive plates 31 of the oscillator are respectively connected to the positive charging line and the negative charging line, or the two conductive plates 31 of the oscillator are respectively connected to two independently set oscillation conductive lines.

[0045] The positive electrode tab 12 of the unit cell 1 is connected to the positive charging line, and the negative electrode tab 11 of the unit cell 1 is connected to the negative charging line. Then, a corresponding pulsed DC current can be input into the unit cell 1 through the positive charging line and the negative charging line, thereby charging the unit cell 1. Further, two conductive sheets 31 of the oscillator can be respectively connected to the positive charging line and the negative charging line, and the positive charging line and the negative charging line are respectively connected through two external electrodes, so as to electrically connect the positive charging line and the negative charging line with an external charging device. Then, this set structure can realize that during the process of charging the unit cell 1 with a pulsed DC current, the oscillator is synchronously driven to generate mechanical vibration, and the DC charging and dendrite elimination can be carried out synchronously. Or, two conductive sheets 31 of the oscillator are respectively connected to two independent oscillation conductive wires. In this case, a DC current can be input into the unit cell 1 through the positive charging line and the negative charging line to charge the unit cell 1, and a pulsed DC current can be independently input into the oscillator through the two oscillation conductive wires to drive the oscillator to generate mechanical vibration. At this time, the mechanical vibration generated by the oscillator and the charging of the unit cell 1 can be carried out independently of each other without interference. For example, when the unit cell 1 is not charged, a pulsed DC current can be input through the two oscillation conductive wires alone to drive the oscillator to generate mechanical vibration.

[0046] In a more specific embodiment, the piezoelectric ceramic particles 32 are lead zirconate titanate ceramic particles. Among them, the particle size of the piezoelectric ceramic particles 32 is 0.5 - 25 μm. Further, the oscillator includes at least two layers of oscillation films 3, and the particle size of the piezoelectric ceramic particles 32 on the oscillation film 3 close to the unit cell 1 is larger than the particle size of the piezoelectric ceramic particles 32 on the oscillation film 3 far from the unit cell 1. To improve the effect of the oscillator generating mechanical vibration and enhance the vibration effect of the mechanical vibration on the unit cell 1, the particle size of the piezoelectric ceramic particles 32 on the oscillation film 3 close to the unit cell 1 can be set to be larger than the particle size of the piezoelectric ceramic particles 32 on the oscillation film 3 far from the unit cell 1, so as to make the oscillation film 3 close to the unit cell 1 generate a stronger vibration effect, and thereby improve the use effect of eliminating dendrites through the generated mechanical vibration.

[0047] In a more specific embodiment, the mass fraction ratio of Pb, Ge, Ni, Ba, Zr, Sn, and Ti in the lead zirconate titanate ceramic particles is (7.5 - 9.5):(0.2 - 0.5):(0.3 - 0.8):(0.6 - 1.8):(4.6 - 5):(3.2 - 3.8):(0.6 - 1.3). Among them, the oscillation film is formed by laminating a cross-linked polytetrafluoroethylene film and a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] film; the thickness of the oscillation film is 20 - 140 μm.

[0048] Specifically, the piezoelectric ceramic particles can be set as lead zirconate titanate ceramic particles, and the mass fraction ratio of Pb, Ge, Ni, Ba, Zr, Sn, and Ti in the lead zirconate titanate ceramic particles is set to (7.5 - 9.5):(0.2 - 0.5):(0.3 - 0.8):(0.6 - 1.8):(4.6 - 5):(3.2 - 3.8):(0.6 - 1.3).

[0049] Among them, the preparation method of the lead zirconate titanate ceramic particles is to mix and stir the lead zirconate titanate powder and the binder according to a certain mass ratio. Among them, the lead zirconate titanate powder is obtained by mixing Pb3O4 powder, GeO2 powder, NiO powder, BaCO3 powder, ZrO2 powder, SnO2 powder, and TiO2 powder according to the mass ratio (7.5 - 9.5):(0.2 - 0.5):(0.3 - 0.8):(0.6 - 1.8):(4.6 - 5):(3.2 - 3.8):(0.6 - 1.3), and the binder is obtained by mixing glycerol, alcohol, and distilled water according to the mass ratio 16:4:80. First, perform pre-pressing treatment with a lower pressure, and then perform dry pressing molding with a higher pressure to obtain a blank. The blank is subjected to high-temperature sintering to obtain a piezoelectric ceramic body. Among them, the blank can be first heated from room temperature to 900 - 1000 °C and maintained for 0.5 hours, and then the blank is heated from the current temperature to 1001 - 1200 °C and maintained for 1.5 - 4.5 hours to complete the sintering operation.

[0050] Among them, the piezoelectric ceramic particles can be uniformly laid on the surface layer of the oscillating film by the following method: grind the piezoelectric ceramic body and screen the ground ceramic particles. Among them, the piezoelectric ceramic powder obtained by grinding can be screened through 1200 - 4000 meshes. Mix the piezoelectric ceramic powder obtained after screening with a viscous solvent to obtain a piezoelectric ceramic powder suspension; among them, the viscous solvent is one or a combination of isopropyl alcohol, cyclohexane, and methylcyclohexanol. The mass ratio of the piezoelectric ceramic powder in the piezoelectric ceramic powder suspension is 0.8 - 2%; coat the piezoelectric ceramic powder suspension evenly on both surfaces of the oscillating film, and then place the oscillating film in an oven and set the heating temperature to 95 - 110 °C to volatilize the viscous solvent; specifically, the piezoelectric ceramic powder suspension can be evenly coated on both surfaces of the oscillating film at the same time and heat-treated; it is also possible to evenly coat the piezoelectric ceramic powder suspension on one surface of the oscillating film for heat treatment, and then evenly coat the piezoelectric ceramic powder suspension on the other surface of the oscillating film for heat treatment. After heating to volatilize the viscous solvent, an oscillating film with piezoelectric ceramic particles can be obtained. Among them, the coating amount of the piezoelectric ceramic powder suspension on the surface of the oscillating film is 45 - 200 ml / m 2 。

[0051] Furthermore, the piezoelectric ceramic particles laid on the surface layer of the oscillating film need to be polarized to possess corresponding functions. Therefore, the oscillating film obtained in the above steps can be polarized under a thermal environment of 140-180 °C and a polarization electric field with a fixed field strength direction. Specifically, the electric field strength of the polarization electric field is 160-350 V / m, where the polarization duration is 20-45 minutes. After polarization is completed, an oscillating film with piezoelectric ceramic coating can be obtained.

[0052] Specifically, as Figure 7 shown, the oscillating film 3 can be formed by laminating a cross-linked polytetrafluoroethylene film 301 and a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] film 302; among them, the thickness of the oscillating film 3 can be set to 20-140 μm; the particle size of the piezoelectric ceramic particles 32 is 0.5-25 μm. Among them, the ratio of the thickness of the cross-linked polytetrafluoroethylene film 301 to the overall thickness of the oscillating film 3 is 0.55-0.7. Among them, the cross-linked polytetrafluoroethylene film 301 is hot-pressed into a certain thickness and then the poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] glue solution is coated on the surface layer of the cross-linked polytetrafluoroethylene film 301 to obtain the oscillating film 3. For example, polytetrafluoroethylene powder, petroleum ether and KH-550 silane coupling agent (γ-aminopropyltriethoxysilane) can be mixed in a preset mass ratio and heated and cured to prepare a paste, and the paste is flattened and extended under a pressure of 5-9.5 MPa by a multi-stage pressing rod to form the cross-linked polytetrafluoroethylene film 301. The pressing pressure and pressing temperature of the multi-stage pressing rod gradually increase, and then the poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] dissolved in chlorobenzene is evenly coated on the cross-linked polytetrafluoroethylene film and annealed at 105-125 °C for 7-10 minutes to obtain the oscillating film.

[0053] A rechargeable battery structure provided with an oscillator disclosed by the present invention, the rechargeable battery structure includes a housing and at least one unit battery cell; the housing is arranged outside the combined unit battery cells, and the oscillator is built inside the housing or externally assembled on the outer side surface of the housing; the oscillator includes two conductive sheets and at least one layer of oscillating film, and piezoelectric ceramic particles are laid on both side surfaces of the oscillating film; each oscillating film is stacked, and the two conductive sheets are respectively clamped on both sides of the stacked oscillating films to form a main oscillating sheet; an insulating outer frame is arranged at the outer edge of the main oscillating sheet. The above rechargeable battery structure can effectively prevent crystal nuclei from generating inside the battery electrode plate of the rechargeable battery structure, improve the charging efficiency of the rechargeable battery, and greatly extend the service life of the rechargeable battery by arranging an oscillator inside or outside the housing and driving the oscillator to generate vibration by passing a DC pulse current, and then breaking the metal ion crystals on the diaphragm through the mechanical force generated by the oscillator.

[0054] The above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A rechargeable battery structure for setting an oscillator, characterized in that, The rechargeable battery structure includes a housing and at least one unit cell; the unit cells are connected in parallel and / or in series; the unit cell includes a negative electrode plate, a positive electrode plate, and a separator disposed between the negative electrode plate and the positive electrode plate. The housing is disposed outside the combined unit cells. The housing includes a first side plate, a second side plate, a first enclosing plate, and a second enclosing plate. The two ends of the first enclosing plate are respectively abutted against the two ends of the second enclosing plate to form an annular enclosing assembly; the first side plate and the second side plate are respectively assembled at the two open ends of the annular enclosing assembly, and the combined unit cells are assembled in the internal cavity formed by enclosing of the first side plate, the second side plate, the first enclosing plate, and the second enclosing plate. The oscillator is built inside the housing or externally assembled on the outer side surface of the housing. The oscillator includes two conductive sheets and at least one layer of oscillation film. Piezoelectric ceramic particles are laid on both side surfaces of the oscillation film; the oscillation films are stacked, and the two conductive sheets are respectively clamped on both sides of the stacked oscillation films to form a main oscillation sheet; an insulating outer frame is disposed at the outer edge of the main oscillation sheet.

2. The rechargeable battery structure provided with an oscillator according to claim 1, characterized in that, The main oscillation sheet is disposed in the gap between the annular enclosing assembly and the combined unit cells, or the main oscillation sheet is respectively disposed in the gap between the first side plate and the unit cells and in the gap between the second side plate and the unit cells.

3. The rechargeable battery structure with an oscillator according to claim 2, characterized in that, A flexible buffer gasket is provided between the main oscillation sheet and the inner side wall of the housing.

4. The rechargeable battery structure provided with an oscillator according to claim 1, wherein, The main oscillation sheet is attached to the outer side surface of the annular enclosing assembly, or the main oscillation sheet is respectively attached to the outer side surfaces of the first side plate and the second side plate.

5. The rechargeable battery structure provided with an oscillator according to any one of claims 2-4, characterized in that, The positive electrode plate and the negative electrode plate of the unit cell are respectively connected to a positive charging wire and a negative charging wire. The two conductive sheets of the oscillator are respectively connected to the positive charging wire and the negative charging wire, or the two conductive sheets of the oscillator are respectively connected to two independent oscillation conducting wires.

6. The rechargeable battery structure provided with an oscillator according to claim 5, characterized in that, The piezoelectric ceramic particles are lead zirconate titanate ceramic particles.

7. The rechargeable battery structure provided with an oscillator according to claim 6, wherein, The particle size of the piezoelectric ceramic particles is 0.5 - 25 μm.

8. The rechargeable battery structure provided with an oscillator according to claim 7, wherein, The oscillator includes at least two layers of oscillation films, and the particle size of the piezoelectric ceramic particles on the oscillation film closer to the unit cell is larger than the particle size of the piezoelectric ceramic particles on the oscillation film farther from the unit cell.

9. The rechargeable battery structure provided with an oscillator according to claim 8, wherein, The mass fraction ratio of Pb, Ge, Ni, Ba, Zr, Sn, and Ti in the lead zirconate titanate ceramic particles is (7.5 - 9.5):(0.2 - 0.5):(0.3 - 0.8):(0.6 - 1.8):(4.6 - 5):(3.2 - 3.8):(0.6 - 1.3).

10. The rechargeable battery structure provided with an oscillator according to claim 9, wherein, The oscillation film is formed by laminating a cross-linked polytetrafluoroethylene film and a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] film; the thickness of the oscillation film is 20 - 140 μm.

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