Battery cover plate weak conductivity injection molding material resistance control method and control system

Abstract

The invention discloses a battery cover plate weak-conductivity injection molding material resistance control method and control system, and relates to the technical field of weak-conductivity injection molding material production.The control method comprises the steps that weak conductivity is sampled, and the resistance value condition of the weak conductivity is determined after hot melting; performing benchmarking on the sample resistance value and the required resistance value, and calculating to obtain a formula proportion; respectively weighing the weak conductive particles and the insulating particles with corresponding weight proportions according to the proportion; uniformly mixing the two granular materials; adding the mixed granular material into a drying machine for drying treatment to obtain an injection molding material after resistance modulation; according to the control method disclosed by the invention, the resistance value of the weak conductive particles is changed by mixing the insulating particles and the weak conductive particles according to a proper proportion, and the effect of adjusting the resistance is achieved by matching different proportion formulas; compared with a mode of adjusting the resistance by controlling the adding amount of the carbon black, the modulation control accuracy of the resistance value is better.

Description

Technical Field

[0001] The invention relates to the technical field of weak-conductivity injection molding material production, and in particular to a method and a control system for controlling the resistance of weak-conductivity injection molding material for a battery cover. Background Art

[0002] At present, the weak conductive resistance of traditional cover plates is controlled by adding conductive carbon black to PPS (polyphenylene sulfide), but as the amount of conductive carbon black increases, the resistance gradually decreases. The rate of decrease starts very slowly, and when it reaches a critical area, it will decrease very quickly (microscopically, a conductive network may be formed), and an "avalanche" phenomenon will occur. At this time, 0.2% of carbon black will make a big difference. The resistance can be increased by reducing carbon black, and it is also easy to do in production, but this increase is uncontrollable. The higher the resistance, the more unstable it is, resulting in large resistance differences between batches of materials and the inability to accurately control the resistance. Summary of the invention

[0003] The purpose of the present invention is to provide a method and control system for controlling the resistance of weakly conductive injection molding materials for battery cover plates, so as to solve the problem that the prior art proposed in the above background technology is difficult to accurately control the resistance of weakly conductive injection molding materials by adding carbon black.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A battery cover plate weak conductive injection molding material resistance control system, comprising the following steps:

[0006] Step 1: Add conductive carbon black to the PPS material to control the resistance and prepare weakly conductive particles;

[0007] Step 2, sampling the weakly conductive particles, and determining the resistance value of the sample (5) after hot melting;

[0008] Step 3: Compare the resistance value of the sample (5) with the required resistance value and calculate the formula ratio;

[0009] Step 4: Weigh the corresponding weights of weakly conductive particles and insulating particles according to the proportion;

[0010] Step 5: Evenly mix the two weighed granular materials;

[0011] Step 6: Add the mixed granular material into a drying machine for drying to obtain the injection molding material after resistance modulation.

[0012] As a further solution of the present invention: in step 2, the formula ratio is calculated by a regression equation, and the regression equation is obtained as follows: first, two material particles in different proportions are mixed separately, the resistance value of each proportion is tested, and the data is recorded using software to calculate the regression equation between the proportional coefficient and the resistance value.

[0013] As a further solution of the present invention: the regression equation is: K=44.2-0.0713R, wherein K is the ratio coefficient of weakly conductive particles to insulating particles, and R is the required resistance value.

[0014] A resistance control system for weak-conductive injection molding materials of battery cover plates comprises a machine platform, a detection mechanism for detecting the resistance of a sample is fixedly installed on one side of the machine platform, a quantitative weighing mechanism for respectively weighing two kinds of particles is arranged inside the machine platform, and a dispersing and mixing mechanism is arranged on one side of the quantitative weighing mechanism.

[0015] As a further solution of the present invention: the detection mechanism includes a detection groove, both ends of the inner wall of the detection groove are fixedly connected to the detection electrode, a resistance meter is fixedly installed below the detection groove, and the working end of the resistance meter is electrically connected to the detection electrode; a shell is fixedly connected above the detection groove, a fan cover is fixedly connected to the inner wall of the shell, and a supply fan is fixedly installed in the middle of the fan cover.

[0016] As a further solution of the present invention: a placement plate is fixedly connected to the middle part of the inner wall of the detection groove, ventilation grooves are provided on both sides of the placement plate, and limiting plates are fixedly connected to both sides of the inner wall of the detection groove, ventilation cavities are provided inside the two limiting plates, and the bottoms of the two ventilation cavities are respectively arranged corresponding to the two ventilation grooves, an air outlet is provided at the bottom of the fan cover, and the top of the air outlet is arranged corresponding to the top of one of the ventilation cavities, and an air guide block is fixedly connected to one side of the inner wall of the fan cover, and the top of the air guide block is inclined.

[0017] As a further solution of the present invention: a storage opening is provided on one side of the shell, and a blocking plate is rotatably connected to the inner wall of the storage opening.

[0018] As a further solution of the present invention: the quantitative weighing mechanism includes two weighing components, the weighing components include a feed port, a material guide rack is fixedly connected below the feed port, a lifting cylinder is fixedly connected to the bottom of the inner wall of the material guide rack, the output end of the lifting cylinder is fixedly connected to the lifting rack, a weighing device is fixedly installed on the top of the lifting rack, the output end of the weighing device is rotatably connected to a receiving groove, an electric push rod is fixedly installed on one side of the lifting rack, and the top of the electric push rod is slidably connected to the bottom of the receiving groove; a discharge port is provided on the side of the material guide rack away from the electric push rod.

[0019] As a further solution of the present invention: a flip motor is fixedly installed on one side of the inner wall of the material guide rack, and a closing plate is fixedly connected to the output end of the flip motor, and a stopper is fixedly connected to the other side of the inner wall of the material guide rack, and one side of the stopper is inclined, and the bottom of the stopper contacts with the top of the closing plate to achieve the closure of the inner cavity of the material guide rack.

[0020] As a further solution of the present invention: the dispersing and mixing mechanism includes a mixing box, one side of the mixing box is fixedly connected with a guide pipe, one end of the guide pipe is fixedly connected to a discharge port, the inner wall of the mixing box is provided with a plurality of stirring components, and the plurality of stirring components are staggered, the stirring component includes a stirring motor, the output end of the stirring motor is fixedly connected with a stirring disk, the edge of the stirring disk is fixedly connected with a stirring rod, the middle part of the stirring rod is fixedly connected with a stirring plate, a discharge port is opened on one side of the mixing box, and a baffle plate is rotatably connected to the inner wall of the discharge port.

[0021] As a further solution of the present invention: an air supply plate is fixedly connected to the bottom of the inner wall of the mixing box, a plurality of air supply pipes are fixedly connected to the top of the air supply plate, an air inlet pipe is fixedly connected to one side of the air supply plate, and one end of the air inlet pipe is fixedly connected to the output end of an external air supply pump.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the control method of the present invention changes the resistance value of the weakly conductive particles by mixing the insulating particles and the weakly conductive particles in an appropriate proportion, and achieves the effect of adjustable resistance by matching different proportion formulas; compared with the method of adjusting the resistance by controlling the amount of carbon black added, the modulation control accuracy of the resistance value of the present application is better;

[0023] The control method of the present invention obtains the relationship between the ratio of the two particles and the resistance value by performing multiple mixed samples and resistance value tests on the insulating particles and the weakly conductive particles in different proportions in advance, and obtains an equation by software fitting calculation. By directly substituting the required resistance value into the equation, a direct ratio is obtained, thereby realizing accurate control and adjustment of the resistance of the manufactured product;

[0024] The control system of the present invention realizes the integration and concentration of various equipment required for the resistance control system by arranging a detection mechanism, a quantitative weighing mechanism and a dispersion mixing mechanism on the machine platform, thereby facilitating the integrated execution of various steps of the modulation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flowchart of the resistance control method of the present invention;

[0026] Figure 2 A three-dimensional diagram of the resistance control method of the present invention;

[0027] Figure 3 It is a cross-sectional view of the detection mechanism of the resistance control system of the present invention;

[0028] Figure 4 It is a cross-sectional view of the quantitative weighing mechanism of the resistance control system of the present invention;

[0029] Figure 5 It is a cross-sectional view of the dispersed mixing mechanism of the resistance control system of the present invention.

[0030] In the figure: 1. machine; 2. quantitative weighing mechanism; 201. material guide rack; 202. closing plate; 203. block; 204. receiving groove; 205. lifting rack; 206. lifting cylinder; 207. electric push rod; 208. weighing device; 209. material outlet; 3. detection mechanism; 301. shell; 302. detection groove; 303. placement plate; 304. limit plate; 305. ventilation cavity; 306. fan cover; 307. air supply fan; 308. air guide block; 309. blocking plate; 4. dispersion and mixing mechanism; 401. mixing box; 403. stirring plate; 404. stirring plate; 405. air supply plate; 406. air supply pipe; 407. material baffle plate; 408. guide pipe; 5. sample. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in 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.

[0032] See also Figure 1 In an embodiment of the present invention, a resistance control system for a battery cover weak conductive injection molding material is provided. First, conductive carbon black is added to a PPS material according to existing technical means, and its resistance is controlled and adjusted to prepare weak conductive particles.

[0033] Weakly conductive particles and insulating particles (i.e. PPS material particles without conductive carbon black added, the PPS material itself is not conductive, called insulating particles) are mixed in different proportions respectively; the resistance value of each proportion is tested, and the data is recorded using software to calculate the regression equation between the proportional coefficient and the resistance value; the weakly conductive particles are sampled, and the resistance value of sample 5 is determined after hot melting, and then the resistance value of sample 5 is compared with the required resistance value, and the formula ratio is calculated by substituting it into the regression equation.

[0034] Weigh the corresponding weights of weakly conductive particles and insulating particles respectively according to the proportion; evenly mix the two granular materials; add the mixed granular materials into a drying machine for drying to obtain an injection molding material after resistance modulation; that is, the present invention achieves the effect of adjustable resistance by mixing the weakly conductive particles and the insulating particles in an appropriate proportion, detecting the resistance value after adding the weakly conductive particles, and matching different proportion formulas;

[0035] The regression equation used in this embodiment is: K=44.2-0.0713R, wherein K is the ratio coefficient of weakly conductive particles to insulating particles, and R is the required resistance (i.e., the target value after resistance modulation). For example, when the required resistance is 100Ω, substituting it into the regression equation, K is approximately 37, and after rounding, the ratio of weakly conductive particles to insulating particles is 37:1; specifically, the regression equation proposed in this embodiment is based on a mixture of different proportions of a batch of material particles and insulating particles used in the actual production of the company, and the resistance value of each proportion is tested. After verifying the correlation of the data (the perason value is -0.961, close to -1, indicating that the proportion of weakly conductive particles is negatively correlated with the resistance layer), a regression equation is obtained based on the data using Minitab: Therefore, the coefficients of the specific equation will vary due to the different batches and properties of the materials used in production, and the actually applicable regression equation needs to be obtained after actual testing and calculation.

[0036] See also Figure 2 A resistance control system for weakly conductive injection molding materials for battery cover plates includes a machine 1, a detection mechanism 3 for detecting the resistance of a sample 5 is fixedly installed on one side of the machine 1, a quantitative weighing mechanism 2 for weighing two types of particles separately is arranged inside the machine 1, and a dispersing and mixing mechanism 4 is arranged on one side of the quantitative weighing mechanism 2; by arranging the detection mechanism 3, the quantitative weighing mechanism 2 and the dispersing and mixing mechanism 4 on the machine 1, the integration and concentration of various equipment required for the resistance control system is realized, thereby facilitating the integrated execution of various steps of the modulation process.

[0037] See also Figure 3 The detection mechanism 3 includes a detection slot 302, both ends of the inner wall of the detection slot 302 are fixedly connected to the detection electrode, a resistance meter is fixedly installed below the detection slot 302, and the working end of the resistance meter is electrically connected to the detection electrode, so that the resistance meter is used to realize the resistance detection of the sample 5; a shell 301 is fixedly connected above the detection slot 302, a fan cover 306 is fixedly connected to the inner wall of the shell 301, and a supply fan 307 is fixedly installed in the middle of the fan cover 306; the detection slot 302 is protected by covering the shell 301 on the detection slot 302, and the supply fan 307 is further provided to supply air to the detection slot 302 for cooling, thereby reducing the influence of temperature on the PPS resistance; the fan cover 306 is provided to reduce the entry of dust into the detection slot 302, thereby avoiding the interference of dust on the resistance detection accuracy.

[0038] A placement plate 303 is fixedly connected to the middle of the inner wall of the detection groove 302, and ventilation grooves are opened on both sides of the placement plate 303. A gap is left between the bottom of the placement plate 303 and the bottom of the inner wall of the detection groove 302, so that the airflow sent by the air supply fan 307 can flow along the ventilation groove and the cavity, so as to realize the circumferential flow of the airflow to the detection sample 5, thereby improving the cooling effect; both sides of the inner wall of the detection groove 302 are fixedly connected to the limit plate 304, and the size of the prepared sample meets the requirements that the two ends of the sample are in contact with the two detection electrodes respectively, and the two sides of the sample are in contact with the two limit plates respectively. The two limit plates 304 are in contact with each other to ensure the accuracy of the sample during the detection process. A ventilation cavity 305 is opened inside the two limit plates 304. The bottoms of the two ventilation cavities 305 are respectively arranged corresponding to the two ventilation slots. In order to guide the airflow delivered by the supply fan 307 into the ventilation cavity 305 and the detection slot 302, an air outlet is opened at the bottom of the fan cover 306. The top of the air outlet is arranged corresponding to the top of one of the ventilation cavities 305. An air guide block 308 is fixedly connected to one side of the inner wall of the fan cover 306, and the top of the air guide block 308 is inclined toward the air outlet.

[0039] To facilitate the placement and removal of samples, a storage port is opened on one side of the shell 301. In order to seal the inside of the shell 301 and ensure a stable testing environment, the inner wall of the storage port is rotatably connected to a blocking plate 309 through a torsion spring. In a natural state, the blocking plate 309 remains vertical under the torsional force of gravity and the torsion spring, thereby achieving the closure of the storage port.

[0040] See also Figure 4 The quantitative weighing mechanism 2 includes two weighing components arranged in parallel, which are respectively used to realize the quantitative weighing of insulating particles and weakly conductive particles. The weighing components include a feed port, a guide frame 201 is fixedly connected below the feed port, a lifting cylinder 206 is fixedly connected to the bottom of the inner wall of the guide frame 201, a lifting frame 205 is fixedly connected to the output end of the lifting cylinder 206, a weighing device 208 is fixedly installed on the top of the lifting frame 205, and a receiving groove 204 is rotatably connected to the output end of the weighing device 208. An electric push rod 207 is fixedly installed on one side of the lifting frame 205, and the top of the electric push rod 207 is slidably connected to the bottom of the receiving groove 204; a discharge port 209 is opened on the side of the guide frame 201 away from the electric push rod 207; the particles to be weighed are connected through the feed port and weighed by the weighing device 208. When the weighing is completed, the receiving groove 204 is lifted to the position of the discharge port 209 by the lifting cylinder 206, and then the receiving groove 204 is turned over by the electric push rod 207 to realize automatic quantitative unloading.

[0041] In order to control the material discharge speed of the feed port and assist in achieving more accurate quantification, a flip motor is fixedly installed on one side of the inner wall of the guide rack 201, and the output end of the flip motor is fixedly connected to a closing plate 202, and a stopper 203 is fixedly connected to the other side of the inner wall of the guide rack 201. One side of the stopper 203 is tilted, and the bottom of the stopper 203 contacts the top of the closing plate 202 to achieve the closure of the inner cavity of the guide rack 201. The rotation angle of the closing plate 202 is controlled by the flip motor, thereby changing the size of the gap between it and the inner wall of the guide rack 201 to achieve control of the particle discharge speed.

[0042] See also Figure 5 The dispersing and mixing mechanism 4 includes a mixing box 401, one side of the mixing box 401 is fixedly connected with a guide pipe 408, one end of the guide pipe 408 is fixedly connected to the discharge port 209, the inner wall of the mixing box 401 is provided with a plurality of stirring components, and the plurality of stirring components are staggered. In the present embodiment, three stirring components are provided, and the three stirring components are arranged at different heights to meet the particle stirring needs at different positions; the stirring component includes a stirring motor, the output end of the stirring motor is fixedly connected with a stirring disk 403, the edge of the stirring disk 403 is fixedly connected with a stirring rod, the middle part of the stirring rod is fixedly connected with a stirring plate 404, a discharging port is provided on one side of the mixing box 401, and a baffle plate 407 is rotatably connected to the inner wall of the discharging port.

[0043] An air supply plate 405 is fixedly connected to the bottom of the inner wall of the mixing box 401, and a plurality of air supply pipes 406 are fixedly connected to the top of the air supply plate 405. An air inlet pipe is fixedly connected to one side of the air supply plate 405, and one end of the air inlet pipe is fixedly connected to the output end of an external air supply pump. By setting up a plurality of air supply pipes 406 to supply air upward, the bottom layer of particles is driven to surge, and the gas flow inside the mixing box 401 is promoted to drive the movement of particles, thereby further improving the uniformity of particle mixing.

[0044] The resistance control system proposed in the present application, when in use, firstly mixes weakly conductive particles with insulating particles in a certain ratio, then takes a sample and hot-melts it to obtain a sample 5, puts the sample 5 into the detection slot 302 and presses it, so that the sample 5 is in stable contact with the detection electrode, and then obtains the resistance of the sample 5 through the resistance meter, and records it; after changing the material ratio, re-samples and tests, imports the obtained multiple sets of data into Minitab to calculate a regression equation, and then substitutes the required resistance into the equation to obtain the ratio of weakly conductive particles to insulating particles, and controls the quantitative weighing mechanism 2 according to the ratio, so that the ratio of the two particles is consistent with the calculated ratio;

[0045] Then, the external feeding equipment feeds weakly conductive particles and insulating particles into the two feeding ports respectively, and the two closing plates 202 are driven by the two flipping motors to rotate respectively, so that the particles gradually fall into the receiving tank 204, and are weighed by the weighing device 208. When the ratio of the two reaches the preset control ratio, the flipping motor drives the closing plate 202 to be completely closed, and then the lifting cylinder 206 drives the receiving tank 204 to move up, so that its position is aligned with the discharge port 209, and then the electric push rod 207 lifts it up, driving the receiving tank 204 to flip and tilt, and pour the particles inside the receiving tank 204 from the discharge port 209, and guides them into the mixing box 401 by the guide pipe;

[0046] A plurality of stirring motors drive the stirring rods and a plurality of stirring plates 404 to rotate, thereby mixing the particles. At the same time, an external air pump sends air into the air through the air inlet pipe, and then sends it out through a plurality of air supply pipes 406, thereby driving the bottom particles to surge and improving the uniformity of the particle mixing. After the mixing is completed, the discharge plate is opened, the particles are taken out, and sent to the subsequent injection molding processing stage to obtain the battery cover.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for controlling the resistance of a weakly conductive injection molding material of a battery cover, characterized in that: The following steps are involved: Step 1: Add conductive carbon black to the PPS material to control the resistance and prepare weakly conductive particles; Step 2, sampling the weakly conductive particles, and determining the resistance value of the sample (5) after hot melting; Step 3: Compare the resistance value of the sample (5) with the required resistance value and calculate the formula ratio; Step 4: Weigh the corresponding weights of weakly conductive particles and insulating particles according to the proportion; Step 5: Evenly mix the two weighed granular materials; Step 6: Add the mixed granular material into a drying machine for drying to obtain the injection molding material after resistance modulation.

2. A method for controlling resistance of a weakly conductive injection molding material of a battery cover according to claim 1, characterized in that: In step three, the formula ratio is calculated by a regression equation. The regression equation is obtained by first mixing two material particles in different proportions, testing the resistance value of each proportion, using software to record data and calculate the regression equation between the proportion coefficient and the resistance value.

3. A method for controlling resistance of a weakly conductive injection molding material of a battery cover according to claim 2, characterized in that: The regression equation is: K=44.2-0.0713R, wherein K is the ratio coefficient of weakly conductive particles to insulating particles, and R is the required resistance.

4. A battery cover plate weak conductive injection molding material resistance control system, characterized in that: A method for controlling the resistance of a weakly conductive injection-molded material for a battery cover plate, for implementing the method as described in any one of claims 1 to 3, comprises a machine (1), a detection mechanism (3) for detecting the resistance of a sample (5) is fixedly mounted on one side of the machine (1), a quantitative weighing mechanism (2) for separately weighing two types of particles is arranged inside the machine (1), and a dispersing and mixing mechanism (4) is arranged on one side of the quantitative weighing mechanism (2).

5. A battery cover plate weak conductive injection molding material resistance control system according to claim 4, characterized in that: The detection mechanism (3) comprises a detection slot (302), both ends of the inner wall of the detection slot (302) are fixedly connected to detection electrodes, a resistance meter is fixedly installed below the detection slot (302), and the working end of the resistance meter is electrically connected to the detection electrode; a shell (301) is fixedly connected above the detection slot (302), a fan cover (306) is fixedly connected to the inner wall of the shell (301), and a supply fan (307) is fixedly installed in the middle of the fan cover (306).

6. A battery cover plate weak conductive injection molding material resistance control system according to claim 5, characterized in that: A placement plate (303) is fixedly connected to the middle of the inner wall of the detection slot (302), ventilation slots are provided on both sides of the placement plate (303), and limiting plates (304) are fixedly connected to both sides of the inner wall of the detection slot (302), ventilation cavities (305) are provided inside the two limiting plates (304), and the bottoms of the two ventilation cavities (305) are respectively arranged corresponding to the two ventilation slots, an air outlet is provided at the bottom of the fan cover (306), and the top of the air outlet is arranged corresponding to the top of one of the ventilation cavities (305), and an air guide block (308) is fixedly connected to one side of the inner wall of the fan cover (306), and the top of the air guide block (308) is arranged inclined.

7. A battery cover plate weak conductive injection molding material resistance control system according to claim 4, characterized in that: The quantitative weighing mechanism (2) comprises two weighing components, wherein the weighing components comprise a feed port, a material guide frame (201) is fixedly connected below the feed port, a lifting cylinder (206) is fixedly connected to the bottom of the inner wall of the material guide frame (201), an output end of the lifting cylinder (206) is fixedly connected to a lifting frame (205), a weighing device (208) is fixedly installed on the top of the lifting frame (205), an output end of the weighing device (208) is rotatably connected to a receiving groove (204), an electric push rod (207) is fixedly installed on one side of the lifting frame (205), and the top of the electric push rod (207) is slidably connected to the bottom of the receiving groove (204); a material discharge port (209) is provided on the side of the material guide frame (201) away from the electric push rod (207).

8. A battery cover plate weak conductive injection molding material resistance control system according to claim 7, characterized in that: A flip motor is fixedly mounted on one side of the inner wall of the material guide rack (201), and the output end of the flip motor is fixedly connected to a closing plate (202). A stopper (203) is fixedly connected to the other side of the inner wall of the material guide rack (201), and one side of the stopper (203) is inclined, and the bottom of the stopper (203) contacts the top of the closing plate (202) to achieve sealing of the inner cavity of the material guide rack (201).

9. A battery cover plate weak conductive injection molding material resistance control system according to claim 4, characterized in that: The dispersing and mixing mechanism (4) comprises a mixing box (401), one side of the mixing box (401) is fixedly connected with a guide pipe (408), one end of the guide pipe (408) is fixedly connected with a discharge port (209), the inner wall of the mixing box (401) is provided with a plurality of stirring components, and the plurality of stirring components are staggered, the stirring components comprise a stirring motor, the output end of the stirring motor is fixedly connected with a stirring disk (403), the edge of the stirring disk (403) is fixedly connected with a stirring rod, the middle part of the stirring rod is fixedly connected with a stirring plate (404), a discharge port is provided on one side of the mixing box (401), and a baffle plate (407) is rotatably connected to the inner wall of the discharge port.

10. A battery cover plate weak conductive injection molding material resistance control system according to claim 9, characterized in that: An air supply plate (405) is fixedly connected to the bottom of the inner wall of the mixing box (401), a plurality of air supply pipes (406) are fixedly connected to the top of the air supply plate (405), and an air inlet pipe is fixedly connected to one side of the air supply plate (405).

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