Preparation device of lithium battery electrolyte

Abstract

The invention discloses a preparation device of a lithium battery electrolyte, belongs to the technical field of lithium batteries, and aims to solve the problems that heat generated when lithium hexafluorophosphate in a kettle is dissolved cannot be effectively removed, so that part of lithium hexafluorophosphate is thermally decomposed, and the quality of the electrolyte is reduced. A plurality of circles of concentric arc-shaped plates which are arranged at intervals are fixed on the bottom surface of the inner side wall of the reaction tank, the arc-shaped plates and the wall surface of the reaction tank are of hollow interlayer structures, the interiors of the arc-shaped plates and the reaction tank are mutually communicated to form an inner cavity, and cooling liquid is arranged in the inner cavity; heat generated by dissolving lithium hexafluorophosphate and an organic solvent can be removed, a large amount of heat generated when the lithium hexafluorophosphate is in contact with the surface of the organic solvent can be removed in time through the arranged fan blades, and the situation that when cooling liquid cannot effectively conduct heat dissipation treatment on the surface of the organic solvent, the cooling liquid cannot effectively conduct heat dissipation treatment on the surface of the organic solvent is avoided. And the lithium hexafluorophosphate salt on the surface of the organic solvent is decomposed by heating, so that the quality of the electrolyte is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a device for preparing a lithium battery electrolyte. Background Art

[0002] Lithium battery electrolyte is the carrier of ion transmission in lithium batteries. It plays the role of conducting ions between the positive and negative electrodes of lithium batteries and is the guarantee for lithium batteries to obtain advantages such as high voltage and high specific energy. When preparing lithium battery electrolyte, it is generally made of electrolyte lithium salt (lithium hexafluorophosphate salt, etc.) and organic solvent, necessary additives and other raw materials. When lithium hexafluorophosphate salt is dissolved in organic solvent, a large amount of heat is generated. Due to the poor thermal stability of lithium hexafluorophosphate salt and its easy decomposition at high temperature, the process of adding lithium hexafluorophosphate salt to organic solvent must be carried out under cooling.

[0003] The heat dissipation structure of the existing lithium battery electrolyte preparation device is usually to set a simple cooling jacket on the stirring kettle. The contact area between the jacket and the kettle body is relatively limited, and the heat generated when the lithium hexafluorophosphate salt in the kettle is dissolved cannot be effectively removed, causing part of the lithium hexafluorophosphate salt to decompose due to heat, thereby reducing the quality of the electrolyte.

[0004] Therefore, a lithium battery electrolyte preparation device is needed to solve the problem in the prior art that the heat generated when the lithium hexafluorophosphate salt is dissolved in the kettle cannot be effectively removed, causing part of the lithium hexafluorophosphate salt to decompose due to heat, thereby reducing the quality of the electrolyte. Summary of the invention

[0005] The object of the present invention is to provide a device for preparing lithium battery electrolyte to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for preparing lithium battery electrolyte, comprising a reaction tank, a plurality of circles of concentric and spaced arc plates are fixed to the bottom surface of the inner wall of the reaction tank, the arc plates and the wall surface of the reaction tank are both hollow sandwich structures, and the interiors of the two are interconnected to form an inner cavity, a coolant is arranged in the inner cavity, a feed pipe is fixed on the reaction tank, a fixing frame is fixed to the top surface of the feed pipe, a rotating rod is movably connected to the top surface of the fixing frame, one end of the rotating rod extends into the reaction tank and is provided with fan blades, and the other end of the rotating rod is provided with a motor.

[0007] Furthermore, a connecting strip is fixed to the bottom of the outer side wall of the rotating rod, three circumferentially distributed cross bars are fixed to the bottom of the connecting strip, a number of evenly distributed vertical bars are fixed to the bottom of the cross bar, and a number of evenly distributed inclined plates are fixed to opposite sides of the outer side wall of the vertical bar.

[0008] Furthermore, a screening net is movably connected to the outer wall of the rotating rod near the top position, and the screening net is inclined. A limiting groove is provided on the inner wall of the feed pipe, and a limiting block is fixed on the outer wall of the screening net. The limiting block is movably engaged in the limiting groove. A storage tube is connected through the outer wall of the feed pipe, and a liquid inlet pipe is connected through the inner wall of the reaction tank near the top position.

[0009] Furthermore, an L-shaped rod is fixed to the outer wall of the rotating rod near the top, a ball sleeve is fixed to the top surface of the L-shaped rod, a rolling ball is movably connected inside the ball sleeve, and a stopper is fixed to the outer wall of the rotating rod near the top, and the top surface of the stopper contacts the bottom surface of the screening net.

[0010] Furthermore, there are three reaction tanks, a connecting plate is fixed between the top surfaces of the three feed pipes, the motor is fixed to the top surface of the connecting plate, a rotating shaft is fixed to the output end of the motor, three evenly distributed first pulleys are fixed to the outer wall of the rotating shaft, a second pulley, a third pulley and a fourth pulley are respectively fixed on the outer walls of the three rotating rods near the top position, the second pulley, the third pulley and the fourth pulley respectively correspond to the three first pulleys, a first belt is movably connected between the first pulley and the third pulley at the top, a third belt is movably connected between the first pulley and the fourth pulley in the middle, and a second belt is movably connected between the first pulley and the second pulley at the bottom.

[0011] Furthermore, a three-way pipe is connected through the bottom surfaces of the inner walls of the three reaction tanks, the three-way pipe passes through the bottom plate, and a discharge pipe is connected through the middle of the bottom surface of the three-way pipe.

[0012] Furthermore, electromagnetic valves are respectively arranged on the outer side walls of the three input ends of the three-way pipe, a PLC controller is fixed on one side of the top surface of the bottom plate, and the three electromagnetic valves are respectively electrically connected to the PLC controller.

[0013] Furthermore, a bottom plate is fixed to the bottom surfaces of the three reaction tanks, three support rods distributed in a circle are fixed to the bottom surface of the bottom plate, and a support plate is fixed to the bottom surfaces of the support rods.

[0014] Furthermore, a plurality of crushing cones distributed in a circle are fixed on the top surface of the fan blade.

[0015] Compared with the prior art, the present invention provides a lithium battery electrolyte preparation device, which has at least the following beneficial effects: (1) The three rotating rods can rotate synchronously by setting the first pulley, the second pulley, the third pulley, the fourth pulley, the first belt, the second belt, the third belt and the motor, and then can synchronously drive the three fan blades to rotate, respectively blowing away the heat in the three reaction tanks, and the reaction tanks, arc plates and inner cavities can increase the contact area between the coolant and the organic solvent, so that the heat generated by the dissolution of the lithium hexafluorophosphate salt and the organic solvent can be removed, and the fan blades can be used to remove a large amount of heat generated when the lithium hexafluorophosphate salt contacts the surface of the organic solvent, thereby avoiding the situation where the lithium hexafluorophosphate salt on the surface of the organic solvent is thermally decomposed when the coolant cannot effectively dissipate the heat on the surface of the organic solvent, thereby reducing the quality of the electrolyte.

[0016] (2) The screening net, L-shaped rod and rolling ball are arranged so that the screening net can move up and down to screen the lithium hexafluorophosphate salt. The fan blades and crushing cones are arranged so that the lithium hexafluorophosphate salt can be screened and crushed, thereby increasing the contact area between the lithium hexafluorophosphate salt and the organic solvent, and improving the dissolution efficiency of the lithium hexafluorophosphate salt and the organic solvent.

[0017] (3) By setting the vertical rods and inclined plates, the lithium hexafluorophosphate salt, additives, raw materials and organic solvent can be fully stirred and mixed during the reaction, thereby improving the quality of the generated electrolyte.

[0018] (4) By setting the rotating rod, screening net, fan blades, crushing cone and inclined plate, the screening, crushing, heat dissipation and stirring and mixing of lithium hexafluorophosphate salt can be integrated, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the discharge pipe of the present invention; Figure 3 This is a schematic diagram of the screening net structure of the present invention; Figure 4 This is a schematic diagram of the storage tube structure of the present invention; Figure 5 For the present invention Figure 3 A is a schematic diagram of the partially enlarged structure of the middle part; Figure 6 For the present invention Figure 4 A schematic diagram of the partially enlarged structure of B in the middle; Figure 7 For the present invention Figure 4 Schematic diagram of the partially enlarged structure of C in the middle.

[0020] In the figure: 100, reaction tank; 101, feed pipe; 102, arc plate; 103, inner cavity; 104, fixed frame; 105, rotating rod; 106, fan blade; 107, crushing cone; 200, connecting strip; 201, horizontal bar; 202, vertical bar; 203, inclined plate; 300, screening net; 301, limiting groove; 302, limiting block; 303, stop block; 400, L-shaped rod; 401, ball sleeve; 402, rolling ball; 500, storage tube; 501, liquid inlet tube; 600, connecting plate; 601, motor; 602, first pulley; 603, first belt; 604, second belt; 605, third belt; 606, second pulley; 607, third pulley; 608, fourth pulley; 700, bottom plate; 701, three-way pipe; 702, electromagnetic valve; 703, discharge pipe; 800, support rod; 801, support plate; 802, PLC controller. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0022] In the accompanying drawings, the size and relative size of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, a specific process sequence may be performed in a different order than described. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the order described. In addition, the same reference numerals represent the same components.

[0023] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0024] See also Figure 1-Figure 7 The present invention provides a lithium battery electrolyte preparation device, comprising a reaction tank 100, characterized in that a plurality of circles of concentric and spaced arc plates 102 are fixed to the bottom surface of the inner wall of the reaction tank 100, the arc plates 102 and the wall surface of the reaction tank 100 are both hollow sandwich structures, and the interiors of the two are interconnected to form an inner cavity 103, in which a coolant is arranged, a feed pipe 101 is fixed to the reaction tank 100, a fixing frame 104 is fixed to the top surface of the feed pipe 101, a rotating rod 105 is movably connected to the top surface of the fixing frame 104, one end of the rotating rod 105 extends into the reaction tank 100 and is provided with a fan blade 106, and the other end of the rotating rod 105 is provided with a motor 601.

[0025] When preparing the lithium battery electrolyte, the organic solvent and lithium hexafluorophosphate salt can be poured into the reaction tank 100 respectively, and then the motor 601 is started to rotate the three rotating rods 105, thereby causing the three fan blades 106 to rotate synchronously. When the fan blades 106 rotate, wind can be generated to blow away the heat generated by the lithium hexafluorophosphate salt and the organic solvent dissolution on the surface of the organic solvent in the reaction tank 100, thereby effectively removing the heat generated on the surface of the organic solvent; through the arc plate 102 and the inner cavity 103 formed in the reaction tank 100, the coolant can enter the arc plate In 102, when the coolant is stored in the arc plate 102, the contact surface with the organic solvent is increased to five surfaces, which greatly increases the contact area between the coolant and the organic solvent, and improves the efficiency of the coolant in removing heat from the organic solvent. This contact mode is not direct contact; by setting a number of gaps between each circle of arc plates 102, the organic solvent in the reaction tank 100 is evenly stored in the reaction tank 100, avoiding uneven storage of the organic solvent between adjacent arc plates 102 when no gaps are set, further causing uneven mixing of the organic solvent and lithium hexafluorophosphate salt.

[0026] In one embodiment, a connecting bar 200 is fixed to the bottom of the outer wall of the rotating rod 105, and three circularly distributed cross bars 201 are fixed to the bottom of the connecting bar 200. A number of evenly distributed vertical bars 202 are fixed to the bottom of the cross bars 201, and a number of evenly distributed inclined plates 203 are fixed to the opposite sides of the outer wall of the vertical bars 202. This arrangement enables the vertical bars 202 and the inclined plates 203 to be respectively located between the radial arc plates 102. The vertical bars 202 and the inclined plates 203 rotate under the transmission of the rotating rod 105, and the organic solvent and lithium hexafluorophosphate salt in the reaction tank 100 are stirred and mixed, which can accelerate the formation speed of the electrolyte. The inclined plates 203 are inclined to effectively stir the organic solvent.

[0027] In one embodiment, a screening net 300 is movably connected to the outer wall of the rotating rod 105 near the top position, and the screening net 300 is tilted. A limiting groove 301 is provided on the inner wall of the feeding pipe 101, and a limiting block 302 is fixed to the outer wall of the screening net 300. The limiting block 302 is movably engaged in the limiting groove 301. A storage tube 500 is connected to the outer wall of the feeding pipe 101, and a liquid inlet pipe 501 is connected to the inner wall of the reaction tank 100 near the top position. The screening net 300 can move up and down to perform lithium hexafluorophosphate salt. During screening, lithium hexafluorophosphate salt can be poured into the feed pipe 101. When the screening net 300 is screening, small particles of lithium hexafluorophosphate salt pass through the mesh of the screening net 300, and large particles of lithium hexafluorophosphate salt enter the storage tube 500 for storage. This arrangement can effectively screen out large particles of lithium hexafluorophosphate salt, making it convenient for small particles of lithium hexafluorophosphate salt to enter the reaction tank 100 to react with the organic solvent; by setting the limiting groove 301 and the limiting block 302, the position of the screening net 300 can be limited, so that the screening net 300 can only move in the vertical direction without being left-handed. The right direction rotation avoids the lack of such a setting mode, and the large particles of lithium hexafluorophosphate salt are screened and accumulated between the screening net 300 and the feeding pipe 101, so that the large particles of lithium hexafluorophosphate salt cannot enter the rice storage tube 500; then the additives and raw materials are evenly poured into the feeding pipe 101, the additives and raw materials are in contact with the organic solvent, the vertical rod 202 and the inclined plate 203 are rotated, and the additives, raw materials and organic solvent are fully stirred and fused to generate an electrolyte, and then the motor 601 is turned off, and the electrolyte storage device is placed under the discharge pipe 703, and the PLC controller 8 is operated. 02, so that the three electromagnetic valves 702 are opened synchronously, and the electrolytes in the three reaction tanks 100 are discharged from the three-way pipe 701 into the discharge pipe 703, and then stored in the storage device; the storage pipe 500 can store the large-particle lithium hexafluorophosphate salt screened by the screening net 300, and the setting of the liquid inlet pipe 501 facilitates the pouring of the organic solvent from the liquid inlet pipe 501 into the reaction tank 100. The amount of organic solvent in the reaction tank 100 is lower than the liquid outlet end of the liquid inlet pipe 501, which prevents the organic solvent from being stored in the liquid inlet pipe 501, making it difficult for this part of the organic solvent to dissolve in the lithium hexafluorophosphate salt.

[0028] In one embodiment, an L-shaped rod 400 is fixed to the outer wall of the rotating rod 105 near the top position, a ball sleeve 401 is fixed to the top surface of the L-shaped rod 400, a rolling ball 402 is movably connected in the ball sleeve 401, a stopper 303 is fixed to the outer wall of the rotating rod 105 near the top position, the top surface of the stopper 303 contacts the bottom surface of the screening net 300, the ball sleeve 401 allows the position of the rolling ball 402 to be movably limited, so that the rolling ball 402 can move in the ball sleeve 401; the rolling ball 402 allows the rolling ball 402 to reduce the friction with the bottom of the screening net 300 when the rotating rod 105 rotates, thereby avoiding the wear of the L-shaped rod 400 when the L-shaped rod 400 directly contacts the bottom of the screening net 300.

[0029] In one embodiment, there are three reaction tanks 100, a connecting plate 600 is fixed between the top surfaces of the three feeding pipes 101, the motor 601 is fixed to the top surface of the connecting plate 600, a rotating shaft is fixed to the output end of the motor 601, three evenly distributed first pulleys 602 are fixed to the outer wall of the rotating shaft, a second pulley 606, a third pulley 607 and a fourth pulley 608 are fixed to the outer walls of the three rotating rods 105 near the top, respectively, the second pulley 606, the third pulley 607 and the fourth pulley 608 correspond to the three first pulleys 602, respectively, a first belt 603 is movably connected between the first pulley 602 and the third pulley 607 at the top, a third belt 605 is movably connected between the first pulley 602 and the fourth pulley 608 in the middle, and the first pulley 602 at the bottom A second belt 604 is movably connected to the second pulley 606. The rotation of the motor 601 drives the rotating rod 105 to rotate. The rotation of the rotating rod 105 drives the three first pulleys 602 to rotate. Through the transmission of the first belt 603, the second belt 604, and the third belt 605, the three rotating rods 105 rotate synchronously. The rotation of the rotating rod 105 drives the L-shaped rod 400 to rotate. The rotation of the L-shaped rod 400 drives the rolling ball 402 to rotate, so that the screening net 300 moves up and down. The rotation of the rotating rod 105 drives the fan blades 106 to rotate, and at the same time drives the connecting bar 200 to rotate. The rotation of the connecting bar 200 drives the vertical rod 202 to rotate. The rotation of the vertical rod 202 drives the inclined plate 203 to rotate. This arrangement enables the three rotating rods 105 to rotate synchronously, which is convenient for synchronously driving the three fan blades 106 to rotate and remove the heat in the reaction tank 100.

[0030] In one embodiment, a three-way pipe 701 is connected through the bottom surfaces of the inner walls of the three reaction tanks 100, and the three-way pipe 701 passes through the bottom plate 700. A discharge pipe 703 is connected through the middle of the bottom surface of the three-way pipe 701. Through the three-way pipe 701, the electrolyte formed after the reaction in the three reaction tanks 100 can be discharged from the three-way pipe 701 into the discharge pipe 703, and then discharged into the corresponding storage device.

[0031] In one embodiment, electromagnetic valves 702 are respectively provided on the outer walls of the three input ends of the three-way pipe 701, and a PLC controller 802 is fixed to one side of the top surface of the bottom plate 700. The three electromagnetic valves 702 are respectively electrically connected to the PLC controller 802. Through the set electromagnetic valves 702 and the PLC controller 802, the three input ends of the three-way pipe 701 can be opened and closed synchronously, thereby facilitating the control of electrolyte outflow.

[0032] In one embodiment, a bottom plate 700 is fixed to the bottom surface of the three reaction tanks 100, three support rods 800 distributed in a circle are fixed to the bottom surface of the bottom plate 700, and a support plate 801 is fixed to the bottom surface of the support rods 800. The bottom plate 700 can be supported by the arranged support rods 800 and support plates 801.

[0033] In one embodiment, a plurality of crushing cones 107 distributed in a circle are fixed to the top surface of the fan blade 106. When the fan blade 106 rotates, the crushing cone 107 is driven to rotate. After being screened by the screening net 300, small particles of lithium hexafluorophosphate salt come into contact with the crushing cone 107 on the surface of the fan blade 106. The crushing cone 107 crushes the lithium hexafluorophosphate salt, so that the lithium hexafluorophosphate salt can be broken into smaller particles, which is convenient for the dissolution of the lithium hexafluorophosphate salt with the organic solvent.

[0034] The motor 601, the electromagnetic valve 702 and the PLC controller 802 can all be purchased from the market, and are mature technologies in this field and have been fully disclosed, so they are not repeated in the specification.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery electrolyte preparation device, comprising a reaction tank (100), characterized in that: A plurality of circles of concentric and spaced arc plates (102) are fixed to the bottom surface of the inner wall of the reaction tank (100); the arc plates (102) and the wall surface of the reaction tank (100) are both hollow sandwich structures, and the interiors of the two are interconnected to form an inner cavity (103); a cooling liquid is arranged in the inner cavity (103); a feed pipe (101) is fixed to the reaction tank (100); a fixing frame (104) is fixed to the top surface of the feed pipe (101); a rotating rod (105) is movably connected to the top surface of the fixing frame (104); one end of the rotating rod (105) extends into the reaction tank (100) and is provided with a fan blade (106); and the other end of the rotating rod (105) is provided with a motor (601).

2. The device for preparing a lithium battery electrolyte according to claim 1, characterized in that: A connecting strip (200) is fixed to the bottom of the outer side wall of the rotating rod (105); three circumferentially distributed cross bars (201) are fixed to the bottom of the connecting strip (200); a plurality of evenly distributed vertical bars (202) are fixed to the bottom of the cross bars (201); and a plurality of evenly distributed inclined plates (203) are respectively fixed to opposite sides of the outer side wall of the vertical bars (202).

3. The device for preparing a lithium battery electrolyte according to claim 1, characterized in that: A screening net (300) is movably connected to the outer wall of the rotating rod (105) near the top, and the screening net (300) is arranged in an inclined manner. A limiting groove (301) is provided on the inner wall of the feeding pipe (101), and a limiting block (302) is fixed to the outer wall of the screening net (300), and the limiting block (302) is movably engaged in the limiting groove (301). A storage tube (500) is connected through the outer wall of the feeding pipe (101), and a liquid inlet pipe (501) is connected through the inner wall of the reaction tank (100) near the top.

4. The device for preparing a lithium battery electrolyte according to claim 3, characterized in that: An L-shaped rod (400) is fixed to the outer wall of the rotating rod (105) near the top, a ball sleeve (401) is fixed to the top surface of the L-shaped rod (400), a rolling ball (402) is movably connected inside the ball sleeve (401), and a stopper (303) is fixed to the outer wall of the rotating rod (105) near the top, the top surface of the stopper (303) contacts the bottom surface of the screening net (300).

5. The device for preparing a lithium battery electrolyte according to claim 1, characterized in that: There are three reaction tanks (100), a connecting plate (600) is fixed between the top surfaces of the three feeding pipes (101), the motor (601) is fixed to the top surface of the connecting plate (600), a rotating shaft is fixed to the output end of the motor (601), three evenly distributed first pulleys (602) are fixed to the outer wall of the rotating shaft, and a second pulley (606), a third pulley (607) and a fourth pulley (608) are respectively fixed to the outer walls of the three rotating rods (105) near the top position. The second pulley (606), the third pulley (607) and the fourth pulley (608) respectively correspond to the three first pulleys (602); a first belt (603) is movably connected between the first pulley (602) and the third pulley (607) at the top; a third belt (605) is movably connected between the first pulley (602) and the fourth pulley (608) in the middle; and a second belt (604) is movably connected between the first pulley (602) and the second pulley (606) at the bottom.

6. The device for preparing a lithium battery electrolyte according to claim 1, characterized in that: A three-way pipe (701) is connected through the bottom surfaces of the inner walls of the three reaction tanks (100), the three-way pipe (701) passes through the bottom plate (700), and a discharge pipe (703) is connected through the middle of the bottom surface of the three-way pipe (701).

7. The device for preparing a lithium battery electrolyte according to claim 6, characterized in that: Electromagnetic valves (702) are respectively arranged on the outer side walls of the three input ends of the three-way pipe (701), a PLC controller (802) is fixed to one side of the top surface of the bottom plate (700), and the three electromagnetic valves (702) are respectively electrically connected to the PLC controller (802).

8. The device for preparing a lithium battery electrolyte according to claim 1, characterized in that: A bottom plate (700) is fixed to the bottom surfaces of the three reaction tanks (100), three support rods (800) distributed in a circumference are fixed to the bottom surface of the bottom plate (700), and a support plate (801) is fixed to the bottom surface of the support rods (800).

9. The device for preparing a lithium battery electrolyte according to claim 1, characterized in that: A plurality of crushing cones (107) distributed in a circumference are fixed to the top surface of the fan blade (106).

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