Solid-state lithium battery with two-pole barrier structure and manufacturing method of solid-state lithium battery

Abstract

The invention discloses a solid-state lithium battery with a two-pole barrier structure, the solid-state lithium battery comprises a protective outer frame, a positioning rod, a pressing column and a battery structure body, the battery structure body is placed in the protective outer frame, the battery structure body comprises fixed plates, barrier wrapping frames and barrier frames which are symmetrically arranged, and connecting holes III are formed in the tops of the two barrier wrapping frames in a penetrating manner. Through the expansibility of a second reset spring and the effect that a first limiting block can slide in a guiding mode in a limiting sliding groove, a pressing column can keep the downward pressing force on a fixing plate in a self-adaptive mode for a long time, and a battery structure body connected with the fixing plate can be stably placed in a designated placement space position in a protective outer frame; and through the arrangement of the two groups of barrier wrapping frames, the fixed plate, the sealing cover and the bottom plate, the combination of the battery structure body is tighter, and external moisture and oxygen are effectively prevented from entering the all-solid-state lithium battery to further damage the battery structure.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a solid-state lithium battery with a bipolar barrier structure and a manufacturing method thereof. Background Art

[0002] All-solid-state lithium battery is the next generation of lithium battery technology, with high specific capacity, long cycle life and good safety performance. All-solid-state lithium battery has broad application prospects in electric vehicles, 3C products and other fields. Solid-state lithium battery uses solid electrolyte to replace the existing organic liquid electrolyte, so there will be no leakage, flatulence and other undesirable phenomena, so that the safety performance of the battery is improved.

[0003] The existing solid-state lithium battery packaging uses an aluminum-plastic film packaging process, which has the problem that the packaging film is not tightly bonded to the battery body, and air may be present to affect its cycle performance. In addition, some substances in the aluminum-plastic film will react with the lithium metal or lithium alloy negative electrode, which urgently needs to be developed. Summary of the invention

[0004] The object of the present invention is to provide a solid-state lithium battery with a bipolar barrier structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solid-state lithium battery with a bipolar barrier structure, comprising a protective outer frame, a positioning rod, a pressure column and a battery structure body, wherein the battery structure body is placed inside the protective outer frame, and the battery structure body comprises a symmetrically arranged fixing plate, a barrier frame and a barrier frame, and the tops of the two barrier frames are both penetrated with a connection hole three, and the top of the protective outer frame is provided with a sealing cover, and the inside of the sealing cover is symmetrically connected with a connection hole two, and the connection hole two and the connection hole three are arranged through, and the cooperation of the connection hole two and the connection hole three enables the iron core to be smoothly connected with the oxide positive electrode and the metal lithium negative electrode;

[0006] The interior of the sealing cover is symmetrically connected to an active cavity, and the two active cavities are connected to a limiting block 1 through a reset spring 2. Both sides of the active cavity are connected to a limiting slide groove connected to the limiting block 1, and the bottom of the limiting block 1 is connected to a pressure column.

[0007] Preferably, the interior of the barrier package frame is connected to an oxide positive electrode and a metal lithium negative electrode, and the positive and negative electrode connecting seats are symmetrically arranged on the top of the sealing cover. The bottom of the positive and negative electrode connecting seats is connected to the oxide positive electrode and the metal lithium negative electrode in the barrier package frame through an iron core, and a fixing plate is fixed on one side of the two barrier packages away from the oxide positive electrode and the metal lithium negative electrode.

[0008] Preferably, positioning rods are connected to both sides of the bottom of the sealing cover, positioning holes matching the positioning rods are connected to both sides of the top of the protective outer frame, handles are connected to both sides of the top of the sealing cover, and a bottom plate is connected to the bottom of the protective outer frame. The arrangement of the protective outer frame and the bottom plate effectively prevents external forces from damaging the battery structure body, thereby effectively protecting the battery structure body.

[0009] Preferably, a solid electrolyte is installed inside the baffle frame, and protective diaphragms are connected to both sides of the solid electrolyte.

[0010] Preferably, the front and rear sides of the barrier frame are both connected with a connection hole 1, and the cooperation between the connection hole 1 and the guide column can limit the movement of the barrier frame;

[0011] The front and rear sides of the baffle frame are both connected with limiting holes, and matching guide pillars are penetrated inside the limiting holes and the first connecting hole, and the guide pillars are fixedly connected to the limiting holes.

[0012] Preferably, the upper and lower parts on both sides of the baffle frame are connected to the corresponding surfaces of the two barrier bag frames through a return spring 1.

[0013] Preferably, buffer springs 1 are connected to the bottom of the bottom plate at equal intervals, the bottom plate is connected to a placement seat via the buffer spring 1, and side plates are connected to both sides of the top of the placement seat.

[0014] Preferably, the front and rear sides of the barrier frame are both connected with heat dissipation ports. The heat dissipation ports connected to the front and rear sides of the barrier frame facilitate the discharge of heat during the charging and discharging process of the battery structure, thereby protecting and extending the service life of the all-solid-state lithium battery.

[0015] Preferably, a sleeve is hinged on the inner side of the side panel, the interior of the sleeve is connected to a limiting block 2 via a buffer spring 2, the other side of the limiting block 2 is connected to a telescopic rod, one end of the telescopic rod extends to the outside of the side of the sleeve and is hinged to the bottom of one side of the protective outer frame.

[0016] A method for manufacturing a solid-state lithium battery with a bipolar barrier structure: first, the battery structure body is composed of two fixed plates, two barrier frames, and a barrier frame, wherein an oxide positive electrode and a metal lithium negative electrode are welded in the two barrier frames respectively, a solid electrolyte is welded in the barrier frame, and a protective diaphragm is bonded to the surfaces of both sides of the solid electrolyte; then, guide pillars are welded in the limiting holes opened on the front and rear sides of the barrier frame, and the connecting holes set in the front and rear sides of the two barrier frames are slidably sleeved outside the two ends of the guide pillars, and the two barrier frames are respectively connected to the corresponding positions on both sides of the barrier frame through reset springs. finally, the sealing cover is positioned and inserted into the positioning hole set at the top of the protective outer frame through the positioning rod, so that the sealing cover is stably placed on the top of the protective outer frame, and handles are welded on both sides of the top of the sealing cover, and the positive and negative electrode connection seats are also welded to the top surface of the sealing cover, and the positive and negative electrode connection seats pass through the preset connection holes 2 and 3 through the iron core and are connected with the oxide positive electrode and the metal lithium negative electrode respectively; the bottom plate is welded at the bottom of the protective outer frame, and the bottom of the bottom plate is connected to the placement seat through the buffer spring 1, and the sleeve is movably hinged to the two sides of the protective outer frame and the corresponding positions of the side plate surface.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) This solid-state lithium battery with a bipolar barrier structure can adaptively maintain the downward pressure on the fixed plate for a long time by the expansion of the return spring 2 and the limit block 1 that can slide along the guide in the limit slide groove, so that the battery structure body connected to the fixed plate can be stably placed in the designated placement space position in the protective outer frame. The battery structure body is more tightly combined by the arrangement of two groups of barrier frames, fixed plates, sealing covers and bottom plates, effectively blocking external moisture and oxygen from entering the interior of the all-solid-state lithium battery, thereby damaging the battery structure;

[0019] (2) The solid-state lithium battery with a bipolar barrier structure can absorb the horizontal vibration generated when the protective frame moves through the horizontal shock-absorbing structure composed of the protective frame, the bottom plate, the second buffer spring, the telescopic rod and the sleeve. The vertical shock-absorbing structure composed of the protective frame, the bottom plate and the first buffer spring can absorb the vertical vibration generated when the protective frame moves, so that the protective frame and the internal battery structure body can operate more stably, thereby improving the protection effect on them.

[0020] (3) This solid-state lithium battery with a bipolar barrier structure undergoes spatial position changes due to the aggregation and dissolution of metallic lithium during the internal redox reaction during the charge and discharge process. The barrier frame is automatically reset by the setting of a reset spring 1, and the barrier frame will not shift during movement by the matching setting of a guide column and a connecting hole 1. The protective diaphragm can effectively delay the penetration of lithium dendrites into the electrolyte layer, thereby avoiding short circuits between the positive and negative electrodes and causing battery safety problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0023] Figure 3 This is a schematic diagram of the connection structure between the protective outer frame and the sleeve of the present invention;

[0024] Figure 4 It is a schematic diagram of the side view structure of the connection between the baffle frame, the solid electrolyte, the reset spring 1 and the limit hole of the present invention;

[0025] Figure 5 It is a schematic diagram of the side view structure of the connection between the barrier package frame and the oxide positive electrode, the first connection hole and the third connection hole of the present invention;

[0026] Figure 6 It is a block diagram of the manufacturing method of the present invention.

[0027] In the figure: 1. protective outer frame; 2. iron core; 3. connecting hole one; 4. oxide positive electrode; 401. metal lithium negative electrode; 5. barrier package frame; 6. sleeve; 7. positive and negative electrode connecting seat; 8. sealing cover; 9. reset spring one; 10. placement seat; 11. bottom plate; 12. buffer spring one; 13. baffle frame; 14. limiting hole; 15. solid electrolyte; 1501. protective diaphragm; 16. handle; 17. connecting hole two; 18. connecting hole three; 19. fixing plate; 20. guide column; 21. side plate; 22. limiting slide groove; 23. limiting block one; 24. positioning hole; 25. positioning rod; 26. reset spring two; 27. movable cavity; 28. pressure column; 29. ​​limiting block two; 30. buffer spring two; 31. telescopic rod; 32. heat dissipation port; 33. battery structure body. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-6 An embodiment of the present invention is as follows: a solid-state lithium battery with a bipolar barrier structure, comprising a protective outer frame 1, a positioning rod 25, a pressure column 28 and a battery structure body 33. The battery structure body 33 is placed inside the protective outer frame 1. The battery structure body 33 includes a symmetrically arranged fixing plate 19, a barrier frame 5 and a barrier frame 13. The battery structure body 33 is more tightly combined through the arrangement of two groups of barrier frames 5, fixing plates 19, sealing covers 8 and bottom plates 11, effectively blocking external moisture and oxygen from entering the interior of the all-solid-state lithium battery, thereby destroying the battery structure.

[0030] A connection hole three 18 is provided in the top of the two barrier package frames 5, and a sealing cover 8 is provided in the top of the protective outer frame 1. The interior of the sealing cover 8 is symmetrically connected with a connection hole two 17. The connection hole two 17 and the connection hole three 18 are arranged through each other. The interior of the sealing cover 8 is symmetrically connected with an active cavity 27. The two active cavities 27 are connected to the limiting block one 23 through the reset spring two 26. The expansion of the reset spring two 26 cooperates with the limiting block one 23 to slide along the guiding action in the limiting slide groove 22, so that the pressure column 28 can adaptively maintain the downward pressure on the fixed plate 19 for a long time, so that the battery structure body 33 connected to the fixed plate 19 can be stably placed in the designated placement space position in the protective outer frame 1.

[0031] Both sides of the movable cavity 27 are connected with limiting sliding grooves 22 connected to the limiting block 1 23 , and the bottom of the limiting block 1 23 is connected with a pressure column 28 .

[0032] The interior of the barrier package frame 5 is connected to the oxide positive electrode 4 and the metal lithium negative electrode 401, and the positive and negative electrode connecting seats 7 are symmetrically arranged on the top of the sealing cover 8. The bottom of the positive and negative electrode connecting seats 7 is connected to the oxide positive electrode 4 and the metal lithium negative electrode 401 in the barrier package frame 5 through the iron core 2. A fixing plate 19 is fixed on one side of the two barrier packages 5 away from the oxide positive electrode 4 and the metal lithium negative electrode 401.

[0033] Both sides of the bottom of the sealing cover 8 are connected to positioning rods 25, both sides of the top of the protective outer frame 1 are connected to positioning holes 24 matching the positioning rods 25, both sides of the top of the sealing cover 8 are connected to handles 16, and the bottom of the protective outer frame 1 is connected to the bottom plate 11. The horizontal shock-absorbing structure composed of the protective outer frame 1, the bottom plate 11, the buffer spring 2 30, the telescopic rod 31 and the sleeve 6 can absorb the horizontal vibration generated when the protective outer frame 1 moves.

[0034] A solid electrolyte 15 is installed inside the baffle frame 13 , and both sides of the solid electrolyte 15 are connected to protective membranes 1501 .

[0035] The front and rear sides of the barrier frame 5 are connected with connection holes 3, the front and rear sides of the baffle frame 13 are connected with limit holes 14, and matching guide columns 20 are passed through the limit holes 14 and the connection holes 3, and the guide columns 20 are fixedly connected to the limit holes 14.

[0036] The upper and lower parts of both sides of the baffle frame 13 are connected to the corresponding surfaces of the two barrier bag frames 5 through the return spring 9.

[0037] The bottom of the bottom plate 11 is evenly connected with buffer springs 12, the bottom plate 11 is connected with the placement seat 10 through the buffer springs 12, and the two sides of the top of the placement seat 10 are connected with side plates 21. The vertical shock-absorbing structure composed of the protective outer frame 1, the bottom plate 11 and the buffer springs 12 can absorb the vertical vibration generated by the movement of the protective outer frame 1, so that the operation of the protective outer frame 1 and the internal battery structure body 33 is more stable, thereby improving the protection effect thereon.

[0038] Heat dissipation openings 32 are connected to the front and rear sides of the barrier frame 5 .

[0039] A sleeve 6 is hinged on the inner side of the side panel 21, and the interior of the sleeve 6 is connected to a limiting block 29 via a buffer spring 230. The other side of the limiting block 29 is connected to a telescopic rod 31, and one end of the telescopic rod 31 extends to the outside of the side of the sleeve 6 and is hinged to the bottom of one side of the protective outer frame 1.

[0040] A method for manufacturing a solid-state lithium battery with a bipolar barrier structure: first, a battery structure body 33 is composed of two fixed plates 19, two barrier frames 5, and a barrier frame 13, wherein the two barrier frames 5 are respectively welded with an oxide positive electrode 4 and a metal lithium negative electrode 401, a solid electrolyte 15 is welded in the barrier frame 13, and a protective diaphragm 1501 is adhered to the surfaces of both sides of the solid electrolyte 15; then, a guide column 20 is welded in a limiting hole 14 opened on the front and rear sides of the barrier frame 13, and a connecting hole 3 opened on the front and rear sides of the two barrier frames 5 is slidably sleeved outside the two ends of the guide column 20, and the two barrier frames 5 are respectively connected to the corresponding positions on both sides of the barrier frame 13 through a reset spring 9. finally, the sealing cover 8 is positioned and inserted into the positioning hole 24 set at the top of the protective outer frame 1 through the positioning rod 25, so that the sealing cover 8 is stably placed on the top of the protective outer frame 1, and the handles 16 are welded on both sides of the top of the sealing cover 8, and the positive and negative electrode connecting seats 7 are also welded to the top surface of the sealing cover 8. The positive and negative electrode connecting seats 7 pass through the preset connection holes 2 17 and the connection holes 3 18 through the iron core 2 and are connected to the oxide positive electrode 4 and the metal lithium negative electrode 401 accordingly; the bottom plate 11 is welded at the bottom of the protective outer frame 1, and the bottom of the bottom plate 11 is connected to the placement seat 10 through the buffer spring 12, and the sleeve 6 is movably hinged to the corresponding positions of the two sides of the protective outer frame 1 and the surface of the side plate 21.

Claims

1. A solid-state lithium battery with a bipolar barrier structure, characterized in that: The invention comprises a protective outer frame (1), a positioning rod (25), a pressure column (28) and a battery structure body (33). The battery structure body (33) is placed inside the protective outer frame (1). The battery structure body (33) comprises a symmetrically arranged fixing plate (19), a barrier frame (5) and a baffle frame (13). The tops of the two barrier frames (5) are each provided with a connection hole (18). The top of the protective outer frame (1) is provided with a sealing cover (8). The sealing cover (8) The interior of the sealing cover (8) is symmetrically connected with a second connection hole (17), and the second connection hole (17) and the third connection hole (18) are arranged to penetrate each other. The interior of the sealing cover (8) is symmetrically connected with an active cavity (27), and the two active cavities (27) are connected to a limiting block (23) through a second return spring (26). Both sides of the interior of the active cavity (27) are connected with a limiting slide groove (22) connected to the limiting block (23), and the bottom of the limiting block (23) is connected with a pressure column (28).

2. A solid-state lithium battery with a bipolar barrier structure according to claim 1, characterized in that: The interior of the barrier package frame (5) is connected to an oxide positive electrode (4) and a metal lithium negative electrode (401); a positive and negative electrode connection seat (7) is symmetrically arranged on the top of the sealing cover (8); the bottom of the positive and negative electrode connection seat (7) is connected to the oxide positive electrode (4) and the metal lithium negative electrode (401) arranged in the barrier package frame (5) through an iron core (2); and a fixing plate (19) is fixed to one side of the two barrier package frames (5) away from the oxide positive electrode (4) and the metal lithium negative electrode (401).

3. A solid-state lithium battery with a bipolar barrier structure according to claim 1, characterized in that: Both sides of the bottom of the sealing cover (8) are connected to positioning rods (25), both sides of the top of the protective outer frame (1) are connected to positioning holes (24) matching the positioning rods (25), both sides of the top of the sealing cover (8) are connected to handles (16), and the bottom of the protective outer frame (1) is connected to a base plate (11).

4. A solid-state lithium battery with a bipolar barrier structure according to claim 1, characterized in that: A solid electrolyte (15) is installed inside the baffle frame (13), and both sides of the solid electrolyte (15) are connected to protective diaphragms (1501).

5. The solid-state lithium battery with a bipolar barrier structure according to claim 1, characterized in that: The front and rear sides of the barrier frame (5) are both connected to a connection hole (3), the front and rear sides of the partition frame (13) are both connected to a limit hole (14), and matching guide columns (20) are inserted into the limit hole (14) and the connection hole (3), and the guide columns (20) are fixedly connected to the limit hole (14).

6. A solid-state lithium battery with a bipolar barrier structure according to claim 5, characterized in that: The upper and lower parts of both sides of the baffle frame (13) are connected to the corresponding surfaces of the two barrier bag frames (5) via a return spring (9).

7. A solid-state lithium battery with a bipolar barrier structure according to claim 3, characterized in that: The bottom of the bottom plate (11) is connected to buffer springs (12) at equal intervals, the bottom plate (11) is connected to a placement seat (10) via buffer springs (12), and both sides of the top of the placement seat (10) are connected to side plates (21).

8. The solid-state lithium battery with a bipolar barrier structure according to claim 5, characterized in that: The front and rear sides of the barrier frame (5) are both connected with heat dissipation openings (32).

9. The solid-state lithium battery with a bipolar barrier structure according to claim 7, characterized in that: A sleeve (6) is hingedly connected to the inner side of the side plate (21); the interior of the sleeve (6) is connected to a second limit block (29) via a second buffer spring (30); the other side of the second limit block (29) is connected to a telescopic rod (31); one end of the telescopic rod (31) extends to the outside of the side of the sleeve (6) and is hingedly connected to the bottom of one side of the protective outer frame (1).

10. A method for manufacturing a solid-state lithium battery with a bipolar barrier structure, characterized in that: First, the battery structure body 33 is composed of two fixed plates (19), two barrier frames (5), and a baffle frame (13), wherein the two barrier frames (5) are respectively welded with an oxide positive electrode (4) and a metal lithium negative electrode (401), the baffle frame (13) is welded with a solid electrolyte (15), and a protective diaphragm (1501) is bonded to the two side surfaces of the solid electrolyte (15); then, the guide column (20) is welded in the limiting hole (14) opened on the front and rear sides of the baffle frame (13), the connection hole (3) set in the front and rear sides of the two barrier frames (5) is slidably sleeved on the two ends of the guide column (20), and the two barrier frames (5) are respectively connected to the corresponding positions on both sides of the baffle frame (13) through the reset spring (9); finally, the sealing cover (8) is passed through The positioning rod (25) is inserted into the positioning hole (24) provided at the top of the protective outer frame (1) so that the (sealing cover 8) is stably placed on the top of the protective outer frame (1), and handles (16) are welded on both sides of the top of the sealing cover (8). The positive and negative electrode connection seats (7) are also welded on the top surface of the sealing cover (8). The positive and negative electrode connection seats (7) pass through the iron core (2) through the preset connection hole 2 (17) and the connection hole 3 (18) and are connected to the oxide positive electrode (4) and the metal lithium negative electrode (401) respectively; the bottom plate (11) is welded at the bottom of the protective outer frame (1), and the bottom of the bottom plate (11) is connected to the placement seat (10) through the buffer spring 1 (12), and the sleeve (6) is movably hinged with the corresponding positions on the two sides of the protective outer frame (1) and the surface of the side plate (21).

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