Rotor pump for positive and negative electrode slurry of lithium battery

Abstract

The invention discloses a rotor pump for lithium battery positive and negative electrode slurry. The rotor pump comprises a base, a pump body is fixedly arranged on the base; flanges at two ends of the pump body are connected with end sockets. A feeding pipe and a discharging pipe are fixedly connected to the two sides of the middle of the pump body respectively. A first shaft rod and a second shaft rod are rotationally connected to the upper side and the lower side of the interior of the pump body correspondingly. The positions, corresponding to the interior of the pump body, of the first shaft rod and the second shaft rod are sequentially and rotationally connected with a first sealing plate, a second sealing plate and a third sealing plate; through movement of the first shaft rod and the second shaft rod, the positions of the first rotor and the second rotor connected to the first shaft rod and the second shaft rod are switched in the multiple cavities in the pump body, and the electronic pump does not need to be replaced; when the motor drives the first rotor and the second rotor to rotate, the two-blade type second rotor or the three-blade type first rotor can be used for conveying lithium battery positive and negative electrode slurry under different working conditions, convenience and simplicity are achieved, the operation stop period is shortened, and the lithium battery production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rotor pumps, and in particular relates to a rotor pump for positive and negative electrode slurries of lithium batteries. Background Art

[0002] A rotor pump is a positive displacement pump that relies on one or more synchronously rotating rotors to transport liquids or slurries. Lithium battery positive and negative electrode slurries are mainly fluid slurries formed by mixing and dispersing active materials, conductive agents, binders, solvents and other raw materials in a certain proportion, and usually have a high viscosity. Among them, rotor pumps are used to transport lithium battery positive and negative electrode slurries because of their low shear force, high wear and corrosion resistance, pulsation-free transportation, good high viscosity adaptability and stable flow.

[0003] At present, the rotor of the rotor pump is widely used with a two-leaf or three-leaf structure. Among them, the two-leaf rotor pump has a spacious cavity channel, which is suitable for high-viscosity, high-particle content slurry, with high conveying efficiency and low energy consumption, and is suitable for energy saving and rapid delivery needs. However, its flow fluctuations and pulsations are large, which may affect the uniformity of coating, and the shear force is high, which may destroy the morphology of slurry particles and affect battery performance. The three-leaf rotor pump has a stable flow output and small shear force, which better protects the slurry particles, helps to improve the coating quality and battery performance, is suitable for slurries with strong fluidity, and avoids flow fluctuations. However, its cavity volume is small, the conveying efficiency is slightly low, and the high fluid resistance leads to increased energy consumption. At the same time, the flow channel gap is small, and there is a risk of blockage when handling high-solid content slurries.

[0004] In general, two-blade rotors are more efficient in conveying high-viscosity, large-particle slurries, but there are problems with flow fluctuations and high shear force; three-blade rotors provide more stable flow output and lower shear force, which is suitable for medium and low viscosity slurries and scenarios with higher uniformity requirements. Therefore, when conveying different lithium battery positive and negative electrode slurries, it is necessary to choose a suitable rotor pump. It is not possible to use the same rotor pump to adapt to different working conditions, which is more troublesome. Summary of the invention

[0005] The purpose of the present invention is to provide a rotor pump for lithium battery positive and negative electrode slurry to solve the technical problem in the prior art that rotor pumps with different numbers of blades need to be disassembled and replaced when transporting lithium battery positive and negative electrode slurry under different working conditions, making slurry transportation more cumbersome.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A rotor pump for positive and negative electrode slurry of lithium batteries, comprising a base; a pump body is fixedly arranged on the base; a head is connected with flanges at both ends of the pump body; a feed pipe and a discharge pipe are fixedly connected to the two sides of the middle of the pump body respectively; the upper side and the lower side of the pump body are rotatably connected with a first shaft rod and a second shaft rod respectively; the first shaft rod and the second shaft rod are rotatably connected with a first sealing plate, a second sealing plate and a third sealing plate in sequence corresponding to the positions inside the pump body; a second rotor is fixedly connected between the first and second shaft rods corresponding to the first and second sealing plates, and the second rotor is a two-blade rotor; a first rotor is fixedly connected between the first and second shaft rods corresponding to the second and third sealing plates, and the first rotor is a three-blade rotor; a driven gear is arranged on the first shaft rod, and a driving gear is arranged on the second shaft rod.

[0008] Preferably, the inner wall of the pump body is provided with four embedded sealing rings, which are hollow structures; a hose is embedded in the inner wall of the pump body; a hollow tube is fixedly connected to the end of the hose, which passes through the outside of the pump body, and the hollow tube, the hose and each sealing ring are interconnected; the distance between adjacent sealing rings is equal to the distance between the first sealing plate and the second sealing plate or the distance between the second sealing plate and the third sealing plate.

[0009] Preferably, the first shaft rod and the second shaft rod are fixed with annular blocks at positions corresponding to the first sealing plate, the second sealing plate and the third sealing plate respectively; the first sealing plate, the second sealing plate and the third sealing plate are provided with limiting holes at positions corresponding to the first shaft rod and the second shaft rod; the limiting holes are composed of a large hole and a small hole, the small hole is arranged in the middle of the large hole, the diameter of the large hole is equal to the diameter of the first shaft rod and the second shaft rod, and the diameter of the small hole is equal to the diameter of the annular block.

[0010] Preferably, one end of the first shaft rod and the second shaft rod passes through the outside of the head; the first shaft rod and the second shaft rod are provided with symmetrically arranged long key grooves at one end away from the second cavity; the driven gear and the driving gear are respectively connected to the first shaft rod and the second shaft rod through the long key groove; and a motor is provided on the end of the base close to the first cavity.

[0011] Preferably, the pump body is fixed with a first limit block at positions corresponding to the upper and lower side walls of the first cavity, and the first limit block has a semicircular structure; a second limit block is fitted on the first limit block, and the driving gear and the driven gear are arranged between the corresponding first limit block and the second limit block.

[0012] Preferably, the second limiting block is provided with a plurality of threaded holes penetrating into the interior of the first limiting block, and the first limiting block and the second limiting block corresponding to each other are connected to each other through the cooperation of the threaded holes and screws.

[0013] Preferably, a connecting plate is provided at one end of the first shaft rod and the second shaft rod close to the motor, and the connecting plate has a T-shaped structure; a circular hole is opened at the connecting plate corresponding to the position of the first shaft rod and the second shaft rod; and an annular groove is opened at the position of the first shaft rod and the second shaft rod corresponding to the circular hole.

[0014] Preferably, an electric push rod is fixedly provided on the side of the pump body; the output end of the electric push rod is connected to a connecting plate.

[0015] Preferably, the motor sleeve is provided with a fixing ring; a sliding block is fixedly connected to the bottom of the fixing ring; a fixing block is fixedly connected to the base at a position corresponding to the sliding block; and a sliding groove is provided on the fixing block.

[0016] Preferably, the sizes of the first sealing plate, the second sealing plate and the third sealing plate match the size of the pump body, and divide the internal space of the pump body into a first cavity, a second cavity, a third cavity and a fourth cavity.

[0017] Beneficial effects of the present invention:

[0018] 1) The present invention divides the internal space of the main body into multiple cavities through the first sealing plate, the second sealing plate and the third sealing plate, and then switches the positions of the first rotor and the second rotor connected thereto in the multiple cavities inside the pump body through the movement of the first shaft rod and the second shaft rod. There is no need to replace the electronic pump, so that when the motor drives the first rotor and the second rotor to rotate, the two-leaf second rotor or the three-leaf first rotor can be used to transport the positive and negative electrode slurry of lithium batteries under different working conditions. This is convenient and simple, shortens the operation stop cycle, and improves the production efficiency of lithium batteries.

[0019] 2) The present invention fills the interior of the hose with liquid such as oil or water through a hollow tube, and then transports the liquid to the interior of each sealing ring through the hose, so that the sealing ring swells, and utilizes the almost incompressible nature of liquids such as oil or water to keep the sealing ring expanded against the first sealing plate, the second sealing plate or the third sealing plate, thereby achieving a good sealing effect and ensuring the normal operation of the rotor pump; on the contrary, when the liquid such as oil or water in the sealing ring flows back, the sealing ring contracts, and the electric push rod can easily drive the first sealing plate, the second sealing plate and the third sealing plate to move inside the pump body, which will not cause significant friction damage to the sealing ring, thereby extending the service life, reducing the maintenance cycle, and facilitating the transportation of positive and negative electrode slurries of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle

[0025] Figure 5 is a cross-sectional view of the sealing ring in the present invention;

[0026] Figure 6 It is a schematic diagram of the first shaft structure in the present invention;

[0027] Figure 7 is a cross-sectional view of the first rotor in the present invention;

[0028] Figure 8 is a cross-sectional view of the second rotor in the present invention;

[0029] Fig. 9 It is a schematic diagram of the connecting plate structure in the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the first sealing plate in the present invention;

[0031] In the figure: 1, base; 2, pump body; 3, head; 4, feed pipe; 5, discharge pipe; 6, first shaft; 601, first sealing plate; 602, second sealing plate; 603, third sealing plate; 604, first rotor; 605, second rotor; 7, second shaft; 701, driving gear; 7011, first limit block; 7012, second limit block; 7013, threaded hole; 702, driven gear; 703, motor; 7031, fixing ring; 7032, slider; 7033, fixing block; 7034, slide groove; 704, connecting plate; 7041, annular groove; 7042, round hole; 705, electric push rod; 8, sealing ring; 801, hose; 802, hollow tube; 9, long key groove; 10, annular block; 11, limit hole. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0033] See also Figure 1 , Figure 2 , Figure 5 , Figure 7 as well as Figure 8As shown, a rotor pump for positive and negative electrode slurry of lithium battery includes a base 1; a pump body 2 is fixedly arranged on the base 1, and the cross section of the pump body 2 is a straight slot structure; flanges at both ends of the pump body 2 are connected with a head 3; a feed pipe 4 and a discharge pipe 5 are fixedly connected to both sides of the middle of the pump body 2, and the feed pipe 4 and the discharge pipe 5 are both connected to the inside of the pump body 2.

[0034] Please refer again Figure 2 As shown, the upper and lower sides of the pump body 2 are rotatably connected with the first shaft rod 6 and the second shaft rod 7 respectively, and one end of the first shaft rod 6 and the second shaft rod 7 passes through the outside of the head 3; the first shaft rod 6 and the second shaft rod 7 are rotatably connected with the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 arranged equidistantly corresponding to the positions inside the pump body 2, and the sizes of the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 match the size of the pump body 2, and divide the internal space of the pump body 2 into a first cavity, a second cavity, a third cavity and a fourth cavity, wherein the third cavity is used to transport the positive and negative electrode slurry of the lithium battery.

[0035] Please refer again Figure 6 As shown, a second rotor 605 is fixedly connected between the first sealing plate 601 and the second sealing plate 602 on the first shaft 6 and the second shaft 7, and the second rotor 605 is a two-blade rotor; a first rotor 604 is fixedly connected between the second sealing plate 602 and the third sealing plate 603 on the first shaft 6 and the second shaft 7, and the first rotor 604 is a three-blade rotor.

[0036] Please refer again Fig.10 As shown, the first shaft rod 6 and the second shaft rod 7 are respectively fixed with an annular block 10 at the positions corresponding to the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603; the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 are respectively provided with a limiting hole 11 at the positions corresponding to the first shaft rod 6 and the second shaft rod 7, and the limiting hole 11 is composed of a large hole and a small hole, and the small hole is arranged in the middle of the large hole, and the diameter of the large hole is equal to the diameter of the first shaft rod 6 and the second shaft rod 7, and the diameter of the small hole is equal to the diameter of the annular block 10.

[0037] Please refer again Figure 6 and Fig. 9As shown, a driven gear 702 is provided at a position corresponding to the first shaft rod 6 inside the first cavity, and a driving gear 701 is provided at a position corresponding to the second shaft rod 7. The driving gear 701 is meshed with the driven gear 702 for transmission, and is used to respectively drive the first shaft rod 6 and the second shaft rod 7 to rotate; the first shaft rod 6 and the second shaft rod 7 are provided with symmetrically arranged long key grooves 9 at one end away from the second cavity; the driven gear 702 and the driving gear 701 are respectively connected to the first shaft rod 6 and the second shaft rod 7 by keys through the long key grooves 9; a motor 703 is provided at one end of the base 1 close to the first cavity, and the output end of the motor 703 is connected to the second shaft rod 7 via a flange.

[0038] Please refer again Figure 3 and Figure 5 As shown, the pump body 2 is fixedly connected with a first limit block 7011 at the position corresponding to the upper and lower side walls of the first cavity, and the first limit block 7011 has a semicircular structure and an L-shaped cross section; the first limit block 7011 is fitted with a second limit block 7012, and the second limit block 7012 has a semicircular structure; the driving gear 701 and the driven gear 702 are arranged between the corresponding first limit block 7011 and the second limit block 7012; the second limit block 7012 is provided with a plurality of threaded holes 7013 that penetrate into the interior of the first limit block 7011, and the first limit blocks 7011 and the second limit blocks 7012 that correspond to each other are connected to each other through the cooperation of the threaded holes 7013 and screws.

[0039] Please refer again Figure 4 and Fig. 9 As shown, a connecting plate 704 is provided at one end of the first shaft rod 6 and the second shaft rod 7 close to the motor 703, and the connecting plate 704 is a T-shaped structure; a circular hole 7042 is opened on the connecting plate 704 corresponding to the position of the first shaft rod 6 and the second shaft rod 7; an annular groove 7041 is opened at the position of the first shaft rod 6 and the second shaft rod 7 corresponding to the circular hole 7042, and the annular groove 7041 fits with the circular hole 7042.

[0040] Please refer again Figure 1 , Figure 2 as well as Figure 6 As shown, an electric push rod 705 is fixedly arranged on the side of the pump body 2; the output end of the electric push rod 705 is connected to the connecting plate 704 through the cooperation of screws and nuts, and is used to cooperate with the connecting plate 704 to drive the first shaft rod 6 and the second shaft rod 7 to move synchronously; the motor 703 is sleeved with a fixing ring 7031, and the fixing ring 7031 is used to fix the motor 703; a slider 7032 is fixedly connected to the bottom of the fixing ring 7031; a fixing block 7033 is fixedly connected to the base 1 at a position corresponding to the slider 7032; a sliding groove 7034 is opened on the fixing block 7033, and the slider 7032 slides inside the sliding groove 7034.

[0041] Please refer again Figure 2 and Figure 5 As shown, the inner wall of the pump body 2 is provided with four embedded sealing rings 8, and the sealing rings 8 are of a hollow structure; the distance between adjacent sealing rings 8 is equal to the distance between the first sealing plate 601 and the second sealing plate 602 or the distance between the second sealing plate 602 and the third sealing plate 603; a hose 801 is embedded in the inner wall of the pump body 2; a hollow tube 802 is fixedly connected to the end of the hose 801, and the hollow tube 802 passes through the outside of the pump body 2, and the hollow tube 802, the hose 801 and each sealing ring 8 are connected to each other.

[0042] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below:

[0043] When a three-blade rotor pump is required to transport the positive and negative electrode slurry of the lithium battery, the electric push rod 705 drives the first shaft rod 6 and the second shaft rod 7 to move synchronously through the connecting plate 704. The first shaft rod 6 and the second shaft rod 7 are connected to the corresponding first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 through the cooperation of the limiting hole 11 and the annular block 10. Therefore, the first rotor 604 on the first shaft rod 6 and the first rotor 604 on the second shaft rod 7 can be driven to move synchronously toward the middle of the pump body 2. At this time, since the first rotor 604 is a three-blade rotor pump and is located inside the third cavity, and since the feed pipe 4 and the discharge pipe 5 are located in the third cavity in the middle of the pump body 2, when the motor 703 drives the second shaft rod 7 to rotate, the first rotor 604 on the second shaft rod 7 can be driven to rotate. Through the cooperation of the driving gear 701 and the driven gear 702, the first shaft rod 6 can drive the first rotor 604 thereon to rotate synchronously. At this time, the three-blade first rotor 604 can be used to realize the transportation of the positive and negative electrode slurry of the lithium battery.

[0044] It is worth noting here that the third cavity is the position inside the pump body 2 where the positive and negative electrode slurries of lithium batteries are transported, the second cavity and the fourth cavity are the positions where the first rotor 604 and the second rotor 605 move and stay, the first cavity is the position where the driving gear 701 and the driven gear 702 are set, and the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 are used to maintain the sealing between each cavity.

[0045] When a two-blade rotor pump is needed to transport the positive and negative electrode slurry of lithium batteries, the electric push rod 705 is also used to drive the first shaft 6 and the second shaft 7 to move synchronously, so that the second rotor 605 on the first shaft 6 and the second rotor 605 on the second shaft 7 are moved to the position of the third cavity. When the motor 703 drives the first shaft 6 and the second shaft 7 to rotate, it can drive the second rotor 605 thereon to rotate synchronously. At this time, the two-blade second rotor 605 can be used to realize the transportation of the positive and negative electrode slurry of lithium batteries.

[0046] The internal space of the main body is divided into multiple cavities by the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603, and the first shaft 6 and the second shaft 7 are moved to switch positions in the multiple cavities inside the pump body 2. There is no need to replace the electronic pump, so that when the motor 703 drives the first rotor 604 and the second rotor 605 to rotate, the two-leaf second rotor 605 or the three-leaf first rotor 604 can be used to transport the positive and negative electrode slurry of lithium batteries under different working conditions. It is convenient and simple, shortens the operation stop cycle, and improves the production efficiency of lithium batteries.

[0047] Among them, in order to achieve good sealing of the rotor pump during operation, when the first sealing plate 601, the second sealing plate 602 or the third sealing plate 603 moves to the sealing ring 8, oil or water or other liquids are filled into the hose 801 through the hollow tube 802, and the liquid is then transported to the inside of each sealing ring 8 through the hose 801 to make the sealing ring 8 swell, and the sealing ring 8 is kept tight against the first sealing plate 601, the second sealing plate 602 or the third sealing plate 603 by utilizing the almost incompressible nature of the liquid such as oil or water, so as to achieve a good sealing effect and ensure the normal operation of the rotor pump; on the contrary, when the oil or water or other liquid in the sealing ring 8 flows back, the sealing ring 8 contracts, and the electric push rod 705 can easily drive the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 to move inside the pump body 2, which will not cause significant friction damage to the sealing ring 8, thereby extending the service life, reducing the maintenance cycle, and facilitating the transportation of the positive and negative electrode slurry of the lithium battery.

[0048] Among them, through the cooperation of the annular block 10 and the limiting hole 11, it can be ensured that the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 will not affect the rotation of the first shaft rod 6 and the second shaft rod 7, and it can be ensured that when the first shaft rod 6 and the second shaft rod 7 move, the first sealing plate 601, the second sealing plate 602 and the third sealing plate 603 are driven to move horizontally synchronously; similarly, through the cooperation of the circular hole 7042 and the annular groove 7041, it can be ensured that when the electric push rod 705 drives the first shaft rod 6 and the second shaft rod 7 to move synchronously through the connecting plate 704, it can not affect its rotation effect.

[0049] Among them, through the cooperation of the semicircular first limit block 7011 and the second limit block 7012, the driving gear 701 and the driven gear 702 can be restricted in the first cavity inside the main body. When the electric push rod 705 drives the first shaft rod 6 and the second shaft rod 7 to move horizontally, the driving gear 701 and the driven gear 702 can be prevented from shifting and losing engagement, thereby failing to transmit the power, affecting the rotor pump's transportation of the positive and negative electrode slurry of the lithium battery.

[0050] It is worth noting here that: since the driving gear 701 and the driven gear 702 are key-connected with the corresponding first shaft rod 6 and second shaft rod 7 through the long keyway 9, when the first shaft rod 6 and the second shaft rod 7 move horizontally, it will not affect the driving gear 701 driving the second shaft rod 7 to rotate, and the driven gear 702 will not affect the driven gear 702 driving the first shaft rod 6 to rotate.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] 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 rotor pump for positive and negative electrode slurry of a lithium battery, comprising a base (1); a pump body (2) is fixedly arranged on the base (1); flanges at both ends of the pump body (2) are connected to heads (3); a feed pipe (4) and a discharge pipe (5) are respectively fixedly connected to the middle two sides of the pump body (2); Features: The upper side and the lower side of the pump body (2) are rotatably connected to a first shaft (6) and a second shaft (7) respectively; the first shaft (6) and the second shaft (7) are rotatably connected to a first sealing plate (601), a second sealing plate (602) and a third sealing plate (603) in sequence corresponding to positions inside the pump body (2); A second rotor (605) is fixedly connected between the first sealing plate (601) and the second sealing plate (602) on the first shaft rod (6) and the second shaft rod (7); a first rotor (604) is fixedly connected between the second sealing plate (602) and the third sealing plate (603) on the first shaft rod (6) and the second shaft rod (7).

2. A rotor pump for positive and negative electrode slurry of a lithium battery according to claim 1, characterized in that: The inner wall of the pump body (2) is provided with four embedded sealing rings (8), and the sealing rings (8) are of a hollow structure; a hose (801) is embedded in the inner wall of the pump body (2); a hollow tube (802) is fixedly connected to the end of the hose (801), and the hollow tube (802), the hose (801) and each sealing ring (8) are interconnected; The distance between adjacent sealing rings (8) is equal to the distance between the first sealing plate (601) and the second sealing plate (602) or the distance between the second sealing plate (602) and the third sealing plate (603).

3. The rotor pump for positive and negative electrode slurry of a lithium battery according to claim 1, characterized in that: The first shaft rod (6) and the second shaft rod (7) are fixedly connected with annular blocks (10) at positions corresponding to the first sealing plate (601), the second sealing plate (602) and the third sealing plate (603) respectively; the first sealing plate (601), the second sealing plate (602) and the third sealing plate (603) are provided with limiting holes (11) at positions corresponding to the first shaft rod (6) and the second shaft rod (7); The limiting hole (11) is composed of a large hole and a small hole. The small hole is arranged in the middle of the large hole. The diameter of the large hole is equal to the diameter of the first shaft rod (6) and the second shaft rod (7). The diameter of the small hole is equal to the diameter of the annular block (10).

4. The rotor pump for positive and negative electrode slurry of a lithium battery according to claim 1, characterized in that: One end of each of the first shaft (6) and the second shaft (7) passes through the outside of the head (3); the first shaft (6) and the second shaft (7) are provided with symmetrically arranged long keyways (9) at one end away from the second cavity; the driven gear (702) and the driving gear (701) are respectively connected to the first shaft (6) and the second shaft (7) by keys via the long keyways (9); and a motor (703) is provided at one end of the base (1) close to the first cavity.

5. A rotor pump for positive and negative electrode slurry of a lithium battery according to claim 4, characterized in that: The pump body (2) is fixedly connected with a first limit block (7011) at positions corresponding to the upper and lower side walls of the first cavity; a second limit block (7012) is fitted on the first limit block (7011); the first limit block (7011) and the second limit block (7012) are in a semicircular structure; The first shaft (6) is provided with a driven gear (702), and the second shaft (7) is provided with a driving gear (701); the driving gear (701) and the driven gear (702) are arranged between the corresponding first limit block (7011) and the second limit block (7012).

6. A rotor pump for positive and negative electrode slurry of a lithium battery according to claim 5, characterized in that: The second limiting block (7012) is provided with a plurality of threaded holes (7013) penetrating into the interior of the first limiting block (7011).

7. The rotor pump for positive and negative electrode slurry of a lithium battery according to claim 1, characterized in that: A connecting plate (704) is provided at one end of the first shaft rod (6) and the second shaft rod (7) close to the motor (703), and the connecting plate (704) is in a T-shaped structure; a circular hole (7042) is provided on the connecting plate (704) at a position corresponding to the first shaft rod (6) and the second shaft rod (7); and an annular groove (7041) is provided on the first shaft rod (6) and the second shaft rod (7) at a position corresponding to the circular hole (7042).

8. A rotor pump for positive and negative electrode slurry of a lithium battery according to claim 7, characterized in that: An electric push rod (705) is fixedly arranged on the side of the pump body (2); the output end of the electric push rod (705) is connected to the connecting plate (704).

9. A rotor pump for positive and negative electrode slurry of a lithium battery according to claim 8, characterized in that: The motor (703) is sleeved with a fixing ring (7031); a slider (7032) is fixedly connected to the bottom of the fixing ring (7031); a fixing block (7033) is fixedly connected to the base (1) at a position corresponding to the slider (7032); and a sliding groove (7034) is provided on the fixing block (7033).

10. The rotor pump for positive and negative electrode slurry of a lithium battery according to claim 1, characterized in that: The sizes of the first sealing plate (601), the second sealing plate (602) and the third sealing plate (603) match the size of the pump body (2), and divide the internal space of the pump body (2) into a first cavity, a second cavity, a third cavity and a fourth cavity.

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