A new energy battery pack protection device

Abstract

The application belongs to the technical field of new energy batteries, and discloses a new energy battery pack protection device, which comprises a shell, a battery shell, a battery inner package, a lithium compound pole, a carbon material pole and a battery diaphragm, further comprises: a baffle bolted in the interior of the shell, a plurality of through grooves are formed in the bottom of the battery inner package, a flexible diaphragm sleeve is arranged on the inner side of the through grooves, a first movable plate is further arranged below the interior of the battery shell, a plurality of top blocks are fixed on the top of the first movable plate, and the top of the top blocks extends to the interior of the flexible diaphragm sleeve; the first movable plate is driven to reciprocate up and down by the magnetic driving mechanism, the top blocks are matched, the flexible diaphragm sleeve is repeatedly inflated and shrunk, so that the upper and lower turbulence is generated, the lithium salt sinking upward is moved, the problem of the vertical concentration difference of the electrolyte is solved, and the attenuation speed of the battery capacity is delayed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy batteries, and specifically relates to a new energy battery pack protection device. BACKGROUND

[0002] New energy lithium ion batteries realize charging and discharging through the migration of lithium ions between positive and negative electrodes. The positive electrode is usually composed of lithium compounds (such as lithium cobaltate and lithium iron phosphate), which serve as lithium sources and undergo oxidation-reduction reactions; the negative electrode is mostly carbon material (such as graphite), and the layered structure of the carbon material can reversibly embed lithium ions. The separator is located between the positive and negative electrodes and is a microporous film that is electronically insulating, allowing lithium ions to pass through to form a current loop, while preventing short circuits and improving battery safety. The electrolyte is a medium for lithium ion transmission, composed of organic solvents (such as ethylene carbonate and dimethyl carbonate), electrolyte salts (such as lithium hexafluorophosphate), and additives, which not only conduct ions but also participate in the formation of a protective film to stabilize the electrode interface. The synergistic effect of various components enables lithium ion batteries to have high energy density, long cycle life, and safety performance, and they are widely used in electric vehicles, energy storage, and other fields.

[0003] In long-term static storage or shallow charging and discharging cycles, LiPF6 (density 1.5 g / cm³) in the electrolyte and organic solvents (density 1.1-1.3 g / cm³) separate due to gravity when at rest, and the electrolyte separates due to the density difference, leading to uneven electrode interface reactions and accelerated capacity decay. SUMMARY

[0004] To solve the problems presented in the background, the application provides a new energy battery pack protection device.

[0005] To achieve the above-mentioned purposes, the application provides the following technical solutions: a new energy battery pack protection device, comprising a shell, a battery shell, a battery inner package, a lithium compound electrode, a carbon material electrode, and a battery separator, further comprising:

[0006] A baffle is bolted to the inside of the shell, a plurality of through slots are formed in the bottom of the battery inner package, a flexible separator sleeve is arranged on the inner side of the through slots, a first movable plate is further arranged below the inside of the battery shell, a plurality of top blocks are fixed to the top of the first movable plate, and the top of the top blocks extends to the inside of the flexible separator sleeve;

[0007] A vertical column is bolted to the inside below the battery shell, a slide sleeve is fixed to the surface of the first movable plate on both sides, and the slide sleeve is in sliding connection with the surface of the vertical column;

[0008] A magnetic drive mechanism is arranged to drive the first movable plate to move up and down reciprocally.

[0009] Preferably, the magnetic driving mechanism comprises a power assembly, a vertical transmission rod and a crankshaft, the vertical transmission rod is fixed with the inside of the shell through a bearing seat, the crankshaft is arranged below the inside of the shell and is fixed with the inside of the shell through a bearing seat, the vertical transmission rod and the crankshaft are in transmission through bevel gears, the surface of the crankshaft is rotationally connected with a plurality of driving rods, a plurality of second movable plates are further arranged below the partition plate, second magnets are embedded on the surface of the second movable plates, first magnets are embedded on the bottom of the first movable plate, a bottom groove is arranged on the bottom of the battery shell, a lower groove is arranged on the surface of the partition plate, a sliding rod is further bolted to the bottom of the partition plate, movable sleeves in sliding connection with the surface of the sliding rod are bolted to the two sides of the second movable plate, and the other end of the driving rod is hingedly connected with the bottom of the second movable plate.

[0010] Preferably, the magnetic pole directions of the two ends of the first magnet are consistent with the magnetic pole directions of the two ends of the second magnet.

[0011] Preferably, the gear ratio of the bevel gears between the vertical transmission rod and the crankshaft is 1:1.

[0012] Preferably, the power assembly comprises a rotating column, a connecting column and a pendulum, the two ends of the rotating column are rotationally connected with the inner wall of the shell and the surface of the partition plate respectively, the rotating column and the vertical transmission rod are in transmission connection through bevel gears, one end of the connecting column is welded with the rotating column, and the pendulum is bolted to the end of the connecting column away from the rotating column.

[0013] Preferably, the gear ratio of the bevel gears between the rotating column and the vertical transmission rod is 10-20:1.

[0014] Preferably, the power assembly further comprises a fixing plate, a damping shock absorber and a rubber shock pad, the fixing plate is bolted to the inside of the shell, the damping shock absorber is bolted to the surface of the fixing plate, the rubber shock pad is fixed with the surface of the damping shock absorber, and the surface of the pendulum is further covered with a rubber sleeve.

[0015] Preferably, through holes are arranged at the edges of the flexible diaphragm sleeve, and threaded holes are arranged on the bottom of the battery inner package.

[0016] Preferably, the first movable plate, the top block and the sliding sleeve are made of polypropylene plastic material, and the sliding sleeve, the first movable plate and the top block are integrally injection molded.

[0017] Preferably, a support plate is further bonded to the bottom of the inner wall of the battery shell, and rail plates are bolted to the bottom of the inner wall of the battery shell and located at the periphery of the support plate.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The application drives the first movable plate up and down by a magnetic driving mechanism, cooperates with the upper block, makes the flexible diaphragm sleeve repeatedly bulge and shrink, thereby generates the up and down turbulence, makes the sinking lithium salt move upward, solves the problem of electrolyte vertical concentration difference, and delays the battery capacity decay rate.

[0020] 2. The application drives the vertical transmission rod and the crankshaft to rotate by the power assembly, and drives the second movable plate up and down by the cooperation of the driving rod, realizes the function of up and down turbulence by the cooperation of the second magnet, the first magnet and the pressure of the electrolyte itself, and generates power by the repulsion of the magnet, without the transmission components entering the inside of the battery from the outside, which brings convenience for the disassembly and replacement of the battery.

[0021] 3. The application drives the vertical transmission rod to rotate by the rotation of the rotating column driven by the swing of the pendulum under the action of inertia during the driving process of the vehicle, realizes the effect of providing power, without additional power source driving device, and limits the swing range of the pendulum by combining the action of the rubber shock pad, the damping shock absorber and the rubber sleeve, and prevents damage when the pendulum collides with the limiting structure. DETAILED DESCRIPTION

[0022] Figure 1 It is a perspective view of the application;

[0023] Figure 2 It is a sectional view of the battery shell of the application;

[0024] Figure 3 It is a sectional view of the battery shell and the battery inner package of the application;

[0025] Figure 4 It is a structural schematic view of the battery inner package of the application;

[0026] Figure 5 It is a structural schematic view of the battery shell of the application;

[0027] Figure 6 It is a structural schematic view of the flexible diaphragm sleeve of the application;

[0028] Figure 7 It is a structural schematic view of the first movable plate of the application;

[0029] Figure 8 It is a sectional view of the shell of the application;

[0030] Figure 9 It is an enlarged structural schematic view of B of the application; Figure 8

[0031] Figure 10 ​It is a structure schematic diagram of the partition plate in the present application.

[0032] Figure 11 It is a partial structure schematic diagram of the magnetic driving mechanism in the present application.

[0033] Figure 12 It is a structure schematic diagram of the second movable plate and its surface in the present application.

[0034] Figure 13 It is an enlarged structure schematic diagram of A in the present application. Figure 1

[0035] Figure 14 It is a sectional view of the other side of the shell in the present application.

[0036] Figure 15 It is a partial structure schematic diagram of the power assembly in the present application.

[0037] Figure 16 It is a pole arrangement diagram of the first magnet and the second magnet in the present application.

[0038] In the figure: 1, shell; 2, partition plate; 3, battery shell; 4, battery inner package; 5, lithium compound pole; 6, carbon material pole; 7, battery diaphragm; 8, through slot; 9, flexible diaphragm sleeve; 10, through hole; 11, threaded hole; 12, bottom groove; 13, first movable plate; 14, top block; 15, sliding sleeve; 16, vertical column; 17, magnetic driving mechanism; 171, power assembly; 1711, rotating column; 1712, connecting column; 1713, pendulum; 1714, rubber sleeve; 1715, fixed plate; 1716, damping shock absorber; 1717, rubber shock pad; 172, vertical transmission rod; 173, crankshaft; 174, driving rod; 175, second movable plate; 176, second magnet; 177, movable sleeve; 178, sliding rod; 179, first magnet; 18, lower groove; 19, support plate; 20, fence plate. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0040] As Figures 1 to 16 ​As shown, the present application provides a new energy battery pack protection device, including shell 1, battery shell 3, battery inner package 4, lithium compound pole 5, carbon material pole 6 and battery separator 7, the device also includes magnetic drive mechanism 17, lithium compound pole 5, carbon material pole 6, electrolyte and battery separator 7 are all arranged in the inside of battery inner package 4, battery inner package 4 is fixed in the inside of battery shell 3, when charging, lithium ion is released from lithium compound pole 5 (positive electrode), passes through electrolyte and embeds into carbon material pole 6 (negative electrode) through battery separator 7, and reverses when discharging, lithium ion returns to positive electrode, and electron passes through external circuit to form current, it needs to be explained that lithium battery is prior art, here is only a brief description of the internal structure and working principle of lithium battery, the inside of shell 1 is bolted with baffle 2, battery shell 3 contains the whole battery fixed to the inside of baffle 2, a plurality of through slots 8 are formed in the bottom of battery inner package 4, flexible separator sleeve 9 is arranged on the inside of through slot 8, clamping groove capable of being fitted with the inner wall of through slot 8 is arranged at the edge of flexible separator sleeve 9, the material of flexible separator sleeve 9 is silica gel, the main component of silica gel is silicon dioxide, which is highly stable in chemical properties, and generally does not react with common components (such as lithium salt LiPF6, organic solvent ethylene carbonate EC, etc.) in lithium battery electrolyte, the inertness enables silica gel to maintain structural integrity when contacting electrolyte, which is not easy to be corroded, preventing electrolyte leakage, through hole 10 is formed at the edge of flexible separator sleeve 9, threaded hole 11 (threaded hole 11 does not extend to the inside of battery inner package 4) is formed in the bottom of battery inner package 4, small screws are used to pass through through hole 10 and enter the inside of threaded hole 11, to realize the fixation of flexible separator sleeve 9, first movable plate 13 is further arranged below the inside of battery shell 3, a plurality of top blocks 14 are fixed on the top of first movable plate 13, the top of top block 14 extends to the inside of flexible separator sleeve 9, vertical column 16 is bolted below the inside of battery shell 3, slide sleeve 15 is fixed on the surface of both sides of first movable plate 13 and is in sliding connection with the surface of vertical column 16, first movable plate 13, top block 14 and slide sleeve 15 are polypropylene plastic materials, and slide sleeve 15, first movable plate 13 and top block 14 are integrally injection molded, under the cooperation of slide sleeve 15 and vertical column 16, first movable plate 13 and slide sleeve 15 can only move up and down along the direction of vertical column 16, the number of magnetic drive mechanism 17 is two groups and is respectively located on both sides of the inside of shell 1.

[0041] The magnetic drive mechanism 17 includes a power assembly 171, a vertical transmission rod 172, and a crankshaft 173. The vertical transmission rod 172 is fixed to the interior of the housing 1 via a bearing seat. The crankshaft 173 is located below the interior of the housing 1 and is fixed to it via a bearing seat. The vertical transmission rod 172 and the crankshaft 173 are capable of rotation. The vertical transmission rod 172 and the crankshaft 173 are driven by bevel gears with a gear ratio of 1:1. Several drive rods 174 are rotatably connected to the surface of the crankshaft 173. Several second movable plates 175 are also provided below the partition 2. Second magnets 176 are embedded on the surface of the second movable plates 175. A first magnet 179 is embedded at the bottom of the first movable plate 13. A bottom groove 12 is provided at the bottom of the battery housing 3. A lower groove 18 is provided on the surface of the partition 2. The bottom groove 12 and the lower groove 18 are used for magnetic passage between the first magnet 179 and the second magnet 176. The magnetic pole directions at both ends of the first magnet 179 are consistent with the magnetic pole directions at both ends of the second magnet 176. Figure 16 As shown), it can generate repulsive force. The bottom of the partition 2 is also bolted with a slide rod 178. Both sides of the second movable plate 175 are bolted with movable sleeves 177. The movable sleeves 177 are slidably connected to the surface of the slide rod 178, so that the second movable plate 175 can only move in the vertical direction. The other end of the drive rod 174 is hinged to the bottom of the second movable plate 175.

[0042] The power assembly 171 provides power for the rotation of the vertical transmission rod 172, which can drive the rotation of the crankshaft 173 through a gear, and the crankshaft 173 drives the bottom end of the drive rod 174 to make a circular motion, and drives the second movable plate 175 to make a reciprocating motion up and down through the upper end of the drive rod 174. During the upward movement of the second movable plate 175, the second magnet 176 and the first magnet 179 approach each other and repel each other, generating a repulsive force that overcomes the pressure of the electrolyte inside the battery inner package 4, thereby causing the first magnet 179 and the first movable plate 13 to move upward, and the top block 14 is driven upward, thereby causing the flexible diaphragm sleeve 9 to extend upward and swell (the flexible diaphragm sleeve 9 is made of silicone material and has ductility), and the electrolyte below is lifted. During the downward movement of the second movable plate 175, the repulsive force between the second magnet 176 and the first magnet 179 is not enough to overcome the pressure of the electrolyte, thereby causing the top of the flexible diaphragm sleeve 9 to retract, and the first movable plate 13 and the top block 14 to descend. The bottom of the inner wall of the battery shell 3 is also bonded with a support plate 19, and the material of the support plate 19 is rubber plastic, which seals the bottom groove 12 at the bottom of the battery shell 3 to prevent the inside from being exposed to the outside. The rubber plastic material (such as ordinary rubber, plastic and rubber plastic composite material) has no significant hindrance to the magnetic field penetration of the neodymium magnet, and its magnetic permeability is close to vacuum, allowing the magnetic field lines to easily pass through. The bottom of the inner wall of the battery shell 3 and the periphery of the support plate 19 are bolted with a fence 20, which plays an auxiliary fixing role for the support plate 19. After the first movable plate 13 and the top block 14 descend, the bottom of the first movable plate 13 contacts the top of the support plate 19.

[0043] The essence of electrolyte stratification is the concentration difference in the vertical direction, and the problem is directly related to the core of the up-and-down convection. During the repeated upward and downward movement of the second movable plate 175, the cooperation of the second magnet 176 and the first magnet 179 and the pressure of the electrolyte itself causes the flexible diaphragm sleeve 9 to repeatedly swell and shrink, thereby generating an upward and downward disturbance, allowing the sinking lithium salt to move upward, solving the problem of vertical concentration difference of electrolyte. Lithium ions migrate between electrode plates in the horizontal direction during charging and discharging, and vertical disturbance is orthogonal to it, with minimal interference, ensuring that disturbance improves uniformity without interfering with ion directional migration. Moreover, the flexible diaphragm sleeve 9 is used to achieve the function of disturbance, avoiding the condition of scratching the internal electrode caused by the internal setting of the stirring component. Moreover, the repulsive force generated by the second magnet 176 arranged below the partition plate 2 and the first magnet 179 arranged inside the battery provides power, so there is no need for transmission components to enter the inside of the battery from the outside. During the disassembly and installation of the battery, there is no need to additionally disassemble the transmission components, which brings convenience to the disassembly and replacement of the battery.

[0044] The power assembly 171 includes a rotating column 1711, a connecting column 1712, and a pendulum 1713. The two ends of the rotating column 1711 are rotatably connected to the inner wall of the housing 1 and the surface of the partition 2, respectively. The rotating column 1711 is connected to the vertical transmission rod 172 via a bevel gear transmission, with a gear ratio of 10 to 20:1. Figure 11 (The size ratio of the bevel gear is for illustrative purposes only.) In this way, when the rotating column 1711 rotates half a turn, it can drive the vertical transmission rod 172 and the crankshaft 173 to rotate several times, so that the second movable plate 175 can move up and down multiple times. One end of the connecting column 1712 is welded to the rotating column 1711. The pendulum 1713 is bolted to the end of the connecting column 1712 away from the rotating column 1711. The pendulum 1713 is made of metal, specifically solid steel. During the vehicle's movement, whether the vehicle is braking, decelerating, or accelerating, the pendulum 1713 can swing under the action of inertia, thereby driving the rotating column 1711 to rotate slightly (forward or reverse rotation is not limited). Under the action of the bevel gear, it drives the vertical transmission rod 172 to rotate several times, thereby providing power to the vertical transmission rod 172 and even the entire magnetic drive mechanism 17. Moreover, it uses the braking, deceleration, or acceleration actions of the vehicle to generate power, without the need for an additional power source drive device.

[0045] The power assembly 171 also includes a fixed plate 1715, a damping shock absorber 1716, and a rubber damping pad 1717. The fixed plate 1715 is bolted to the inside of the housing 1, the damping shock absorber 1716 is bolted to the surface of the fixed plate 1715, and the surface of the rubber damping pad 1717 is fixed to the surface of the damping shock absorber 1716. The surface of the pendulum 1713 is also covered with a rubber sleeve 1714. During the swing of the pendulum 1713, the rubber sleeve 1714 will come into contact with the surface of the rubber damping pad 1717, which will play a preliminary buffering role. At the same time, the damping shock absorber 1716 will further buffer and dampen the shock. This not only limits the swing range of the pendulum 1713, but also prevents the pendulum 1713 from being damaged when it collides with these limiting structures.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A protective device for a new energy battery pack, comprising a housing (1), a battery outer shell (3), a battery inner encapsulation (4), a lithium compound electrode (5), a carbon material electrode (6), an electrolyte, and a battery separator (7), wherein the lithium compound electrode (5), the carbon material electrode (6), the electrolyte, and the battery separator (7) are all disposed inside the battery inner encapsulation (4), and the battery inner encapsulation (4) is fixed inside the battery outer shell (3), characterized in that, Also includes: A partition (2) is bolted inside the housing (1). Several through slots (8) are opened at the bottom of the battery inner package (4). A flexible diaphragm sleeve (9) is provided on the inner side of the through slots (8). The flexible diaphragm sleeve (9) is made of silicone. A first movable plate (13) is also provided at the bottom inside the battery housing (3). Several top blocks (14) are fixed on the top of the first movable plate (13), and the top of the top blocks (14) extends into the interior of the flexible diaphragm sleeve (9). A vertical column (16) is bolted to the lower part of the inside of the battery casing (3). Sliding sleeves (15) are fixed on both sides of the surface of the first movable plate (13), and the sliding sleeves (15) are slidably connected to the surface of the vertical column (16). A magnetic drive mechanism (17) drives the first movable plate (13) to reciprocate up and down. Several second movable plates (175) are also provided below the partition (2). The surface of the second movable plate (175) is embedded with a second magnet (176). The bottom of the first movable plate (13) is embedded with a first magnet (179). The magnetic pole directions at both ends of the first magnet (179) are consistent with the magnetic pole directions at both ends of the second magnet (176).

2. The new energy battery pack protection device according to claim 1, characterized in that: The magnetic drive mechanism (17) includes a power assembly (171), a vertical transmission rod (172), and a crankshaft (173). The vertical transmission rod (172) is fixed to the interior of the housing (1) through a bearing seat. The crankshaft (173) is located below the interior of the housing (1) and is fixed to it through a bearing seat. The vertical transmission rod (172) and the crankshaft (173) are driven by a bevel gear. Several drive rods (174) are rotatably connected to the surface of the crankshaft (173). The bottom of the battery housing (3) is provided with a bottom groove (12). The surface of the partition (2) is provided with a lower groove (18). A slide rod (178) is also bolted to the bottom of the partition (2). Movable sleeves (177) that are slidably connected to the surface of the slide rod (178) are bolted to both sides of the second movable plate (175). The other end of the drive rod (174) is hinged to the bottom of the second movable plate (175).

3. The new energy battery pack protection device according to claim 2, characterized in that: The gear ratio of the bevel gear between the vertical transmission rod (172) and the crankshaft (173) is 1:

1.

4. The new energy battery pack protection device according to claim 2, characterized in that: The power assembly (171) includes a rotating column (1711), a connecting column (1712), and a pendulum (1713). The two ends of the rotating column (1711) are rotatably connected to the inner wall of the housing (1) and the surface of the partition (2), respectively. The rotating column (1711) is connected to the vertical transmission rod (172) through a bevel gear transmission. One end of the connecting column (1712) is welded to the rotating column (1711). The pendulum (1713) is bolted to the end of the connecting column (1712) away from the rotating column (1711).

5. The new energy battery pack protection device according to claim 4, characterized in that: The gear ratio of the bevel gear between the rotating column (1711) and the vertical transmission rod (172) is 10 to 20:

1.

6. The new energy battery pack protection device according to claim 4, characterized in that: The power assembly (171) also includes a fixed plate (1715), a damping shock absorber (1716), and a rubber damping pad (1717). The fixed plate (1715) is bolted to the inside of the housing (1). The damping shock absorber (1716) is bolted to the surface of the fixed plate (1715). The rubber damping pad (1717) is fixed to the surface of the damping shock absorber (1716). The surface of the pendulum (1713) is also covered with a rubber sleeve (1714).

7. The new energy battery pack protection device according to claim 1, characterized in that: The flexible diaphragm sleeve (9) has a through hole (10) at its edge, and the battery inner package (4) has a threaded hole (11) at its bottom.

8. The new energy battery pack protection device according to claim 1, characterized in that: The first movable plate (13), the top block (14) and the sliding sleeve (15) are made of polypropylene plastic, and the sliding sleeve (15), the first movable plate (13) and the top block (14) are integrally injection molded.

9. The new energy battery pack protection device according to claim 1, characterized in that: A support plate (19) is also attached to the bottom of the inner wall of the battery casing (3), and a guardrail (20) is bolted to the bottom of the inner wall of the battery casing (3) and around the support plate (19).

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