Electromagnet magnetizing and demagnetizing control device and carrying equipment

Abstract

The utility model discloses an electromagnet magnetizing and demagnetizing control device and carrying equipment, and relates to the technical field of electromagnet magnetizing and demagnetizing, the electromagnet magnetizing and demagnetizing control device comprises a single-chip microcomputer, a controller, 2n half-bridge driving chips, n H-bridge circuits and n electromagnet sets, the controller is electrically connected with the single-chip microcomputer, the magnetizing signal is used for indicating to magnetize the (i + 1) / 2-th electromagnet group; the i-th half-bridge driving chip is electrically connected with a switch element on a half-bridge branch in the (i + 1) / 2-th H-bridge circuit, the (i + 1)-th half-bridge driving chip is electrically connected with a switch element on the other half-bridge branch in the (i + 1) / 2-th H-bridge circuit, and the (i + 1) / 2-th electromagnet group is electrically connected with the (i + 1) / 2-th H-bridge circuit. Rds of the H-bridge circuit and the size of the bearing voltage are adjusted, overheating of the H-bridge circuit is avoided, and the number of loadable electromagnets is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnet charging and demagnetization, in particular to an electromagnet charging and demagnetization control device and handling equipment. Background Art

[0002] The existing electromagnet charging and demagnetization control device uses an H-bridge integrated chip to conduct current for the electromagnet. The existing H-bridge integrated chip has a large Rds, a small voltage carrying capacity, and is prone to heat, resulting in a small number of electromagnets that can be expanded by the electromagnet charging and demagnetization control device. Utility Model Content

[0003] The utility model aims to provide an electromagnet charging and demagnetizing control device and handling equipment, so as to solve the problem that the electromagnet charging and demagnetizing control device in the prior art can load a small number of electromagnets.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] In a first aspect, the present application provides an electromagnet charging and demagnetization control device, the electromagnet charging and demagnetization control device comprising a single chip microcomputer, a controller (such as a PLC), 2n half-bridge drive chips, n H-bridge circuits and n electromagnet groups, wherein:

[0006] The controller is electrically connected to the single chip microcomputer to send a magnetization signal to the single chip microcomputer for instructing the (i+1) / 2th electromagnet group to be magnetized, where i is an odd number less than or equal to 2n, and n is a natural number;

[0007] The single chip microcomputer is electrically connected to 2n half-bridge driver chips, wherein the i-th half-bridge driver chip is electrically connected to the switch element on one half-bridge branch in the (i+1) / 2-th H-bridge circuit, the i+1-th half-bridge driver chip is electrically connected to the switch element on the other half-bridge branch in the (i+1) / 2-th H-bridge circuit, and the (i+1) / 2-th electromagnet group is electrically connected to the (i+1) / 2-th H-bridge circuit;

[0008] When the single chip microcomputer determines that the magnetization signal for instructing to magnetize the (i+1) / 2th electromagnet group has stopped, the switching state of each switching element in the (i+1) / 2th H-bridge circuit is changed through the i-th half-bridge driver chip and the i+1-th half-bridge driver chip to demagnetize the connected (i+1) / 2th electromagnet group.

[0009] As a further solution of the utility model: the electromagnet charging and demagnetization control device also includes an independent first power supply circuit and a second power supply circuit, the first power supply circuit is used to power the single-chip microcomputer, and the second power supply circuit powers the (i+1) / 2th electromagnet group through the (i+1) / 2th H-bridge circuit.

[0010] As a further solution of the utility model: the first power supply circuit includes a DC / DC isolation switching power supply and an LDO linear voltage regulator chip, and the LDO linear voltage regulator chip is connected between the DC / DC isolation switching power supply and the power input pin of the single-chip microcomputer; the DC / DC isolation switching power supply is used to convert the 24V power supply into an isolated 5V voltage, and the LDO linear voltage regulator chip is used to step down the 5V voltage provided by the DC / DC isolation switching power supply to a stable 3.3V.

[0011] As a further solution of the present invention: the second power supply circuit provides a rated voltage of 24V-100V.

[0012] As a further solution of the utility model: the electromagnet charging and demagnetization control device also includes 2n capacitor isolation chips and n charging and demagnetization signal channels, the (i+1) / 2th charging and demagnetization signal channel electrically connects the (i+1) / 2th output pin of the single-chip computer with the i-th half-bridge drive chip and the i+1th half-bridge drive chip, and the i-th capacitor isolation chip and the i+1th capacitor isolation chip are installed on the (i+1) / 2th charging and demagnetization signal channel to isolate the pulse signal sent by the single-chip computer on the (i+1) / 2th charging and demagnetization signal channel.

[0013] As a further solution of the utility model: the pulse signal includes 2n complementary PWM signals respectively used to control the magnetization and demagnetization of the n electromagnet groups, wherein:

[0014] The i-th and i+1-th complementary PWM signals pass through the (i+1) / 2-th charging and demagnetization signal channel, the i-th capacitor isolation chip is used to isolate the i-th complementary PWM signal, and the i+1-th capacitor isolation chip is used to isolate the i+1-th complementary PWM signal.

[0015] As a further solution of the utility model: each switch element of the H-bridge circuit includes a first transistor, a second transistor, a third transistor and a fourth transistor, wherein:

[0016] The first transistor and the fourth transistor are located on one half-bridge branch of the H-bridge circuit and on one diagonal of the H-bridge circuit, and the second transistor and the third transistor are located on the other half-bridge branch of the H-bridge circuit and on the other diagonal of the H-bridge circuit;

[0017] Each of the complementary PWM signals comprises a first signal and a second signal, the first signal of the i-th complementary PWM signal controls the first transistor of the (i+1) / 2-th H-bridge circuit, the second signal of the i-th complementary PWM signal controls the second transistor of the (i+1) / 2-th H-bridge circuit, the first signal of the i+1-th complementary PWM signal controls the fourth transistor of the (i+1) / 2-th H-bridge circuit, and the second signal of the i+1-th complementary PWM signal controls the third transistor of the (i+1) / 2-th H-bridge circuit;

[0018] When the first signal of the i-th complementary PWM signal and the first signal of the i+1-th complementary PWM signal are at a high level, the first transistor and the fourth transistor are turned on, the second signal of the i-th complementary PWM signal and the second signal of the i+1-th complementary PWM signal are at a low level, the second transistor and the third transistor are turned off, and the (i+1) / 2-th electromagnet group is magnetized;

[0019] When the second signal of the i-th complementary PWM signal and the second signal of the i+1-th complementary PWM signal are at a high level, the second transistor and the third transistor are turned on, the first signal of the i-th complementary PWM signal and the first signal of the i+1-th complementary PWM signal are at a low level, the first transistor and the fourth transistor are turned off, and the (i+1) / 2-th electromagnet group is demagnetized.

[0020] As a further solution of the utility model: the electromagnet charging and demagnetization control device also includes n photoelectric couplers and n start channels, the (i+1) / 2th start channel is connected to the (i+1) / 2th output pin of the controller and the (i+1) / 2th input pin of the single-chip computer, and the (i+1) / 2th photoelectric coupler is installed on the (i+1) / 2th start channel to isolate the magnetization signal sent by the controller on the (i+1) / 2th start channel.

[0021] As a further solution of the utility model: the electromagnet charging and demagnetization control device also includes a display screen, which is electrically connected to the single-chip computer to at least display an operating mode selection control, and the operating mode selection control is used to guide the selection of the demagnetization operating mode. The operating mode selection control is used to guide the selection of the demagnetization operating mode.

[0022] As a further solution of the utility model: the display screen adopts a digital tube display screen.

[0023] As a further solution of the utility model: the electromagnet charging and demagnetization control device also includes a heat dissipation shell, the heat dissipation shell is composed of heat dissipation fins, and each of the switch elements is installed on the heat dissipation shell.

[0024] In a second aspect, the present application provides a handling device: the handling device includes the above-mentioned electromagnet charging and demagnetization control device, the handling device is used to pick up or release a tool, and the tool is used to press the welding ribbon against the battery cell;

[0025] The tooling is provided with a magnetizable interaction part, and the handling equipment absorbs or releases the interaction part of the tooling through a plurality of electromagnet groups to pick up or release the tooling.

[0026] The beneficial effects of the utility model are as follows: by setting up a half-bridge driving chip and an H-bridge circuit, the charging and demagnetization functions of the electromagnet are ensured while facilitating the replacement of the switch element according to actual needs, thereby achieving the adjustment of the Rds and the load voltage of the H-bridge circuit, avoiding overheating of the H-bridge circuit, and increasing the number of electromagnets that can be loaded by the electromagnet charging and demagnetization control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a structural schematic diagram of the electromagnet charging and demagnetization control device in the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that the words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1 As shown, the present application discloses an electromagnet charging and demagnetization control device, including a single chip microcomputer, a controller, n start channels, 2n half-bridge drive chips, n charging and demagnetization signal channels, n H-bridge circuits and n electromagnet groups, wherein:

[0033] The (i+1) / 2 output pin of the controller and the (i+1) / 2 input pin of the single chip are electrically connected via the (i+1) / 2 start channel, and the controller sends a magnetization signal for instructing the single chip to magnetize the (i+1) / 2 electromagnet group via the (i+1) / 2 start channel. i is an odd number less than or equal to 2n, and n is a natural number.

[0034] Each charging and demagnetization signal channel corresponds to two half-bridge driver chips respectively. The (i+1) / 2th output pin of the single-chip microcomputer is electrically connected to the i-th half-bridge driver chip and the i+1-th half-bridge driver chip through the (i+1) / 2th charging and demagnetization signal channel, so that the single-chip microcomputer is electrically connected to all 2n half-bridge driver chips.

[0035] Two half-bridge driver chips correspond to one H-bridge circuit. Specifically, the i-th half-bridge driver chip is electrically connected to the switching element on one half-bridge branch in the (i+1) / 2-th H-bridge circuit, the i+1-th half-bridge driver chip is electrically connected to the switching element on the other half-bridge branch in the (i+1) / 2-th H-bridge circuit, and the (i+1) / 2-th electromagnet group is electrically connected to the (i+1) / 2-th H-bridge circuit.

[0036] When the single chip microcomputer determines that the magnetization signal sent by the controller to instruct the magnetization of the (i+1) / 2th electromagnet group has stopped, it changes the switching state of each switching element in the (i+1) / 2th H-bridge circuit through the i-th half-bridge driver chip and the i+1-th half-bridge driver chip to demagnetize the connected (i+1) / 2th electromagnet group.

[0037] Specifically, the single chip microcomputer controls the on and off of each switch element in the H-bridge circuit by sending pulse signals to each magnetization and demagnetization signal channel, thereby controlling the magnetization and demagnetization of each electromagnet group. The pulse signal includes 2n complementary PWM signals for controlling the magnetization and demagnetization of n electromagnet groups, respectively, and the i-th and i+1-th complementary PWM signals pass through the (i+1) / 2-th magnetization and demagnetization signal channel.

[0038] The switch elements of each H-bridge circuit include a first transistor, a second transistor, a third transistor and a fourth transistor. The transistors can be triodes or MOS tubes, preferably MOS tubes.

[0039] The first transistor and the fourth transistor are located on a half-bridge branch of the H-bridge circuit and on one diagonal of the H-bridge circuit, and the second transistor and the third transistor are located on the other half-bridge branch of the H-bridge circuit and on the other diagonal of the H-bridge circuit.

[0040] Each complementary PWM signal includes a first signal and a second signal, the first signal of the i-th complementary PWM signal controls the first transistor of the (i+1) / 2-th H-bridge circuit, the second signal of the i-th complementary PWM signal controls the second transistor of the (i+1) / 2-th H-bridge circuit, the first signal of the i+1-th complementary PWM signal controls the fourth transistor of the (i+1) / 2-th H-bridge circuit, and the second signal of the i+1-th complementary PWM signal controls the third transistor of the (i+1) / 2-th H-bridge circuit.

[0041] When the first signal of the i-th complementary PWM signal and the first signal of the i+1-th complementary PWM signal are at a high level, the first transistor and the fourth transistor are turned on, the second signal of the i-th complementary PWM signal and the second signal of the i+1-th complementary PWM signal are at a low level, the second transistor and the third transistor are turned off, and the (i+1) / 2-th electromagnet group is magnetized.

[0042] When the second signal of the i-th complementary PWM signal and the second signal of the i+1-th complementary PWM signal are at a high level, the second transistor and the third transistor are turned on, the first signal of the i-th complementary PWM signal and the first signal of the i+1-th complementary PWM signal are at a low level, the first transistor and the fourth transistor are turned off, and the (i+1) / 2-th electromagnet group is demagnetized.

[0043] The electromagnet charging and demagnetization control device provided in the present application is provided with two parts, an independent half-bridge driving chip and an H-bridge circuit. Compared with the integrated H-bridge integrated chip used in the prior art, the switching elements in the H-bridge circuit can be easily replaced according to actual needs, thereby achieving the adjustment of the Rds and the load voltage of the H-bridge circuit, reducing the heating condition of the switching elements, allowing the H-bridge circuit to carry a larger current, and increasing the number of electromagnets that can be loaded by the electromagnet charging and demagnetization control device.

[0044] In some examples, the electromagnet charging and demagnetization control device further includes 2n capacitor isolation chips, and the i-th capacitor isolation chip and the i+1-th capacitor isolation chip are installed on the (i+1) / 2-th charging and demagnetization signal channel to isolate the pulse signal sent by the single-chip computer on the (i+1) / 2-th charging and demagnetization signal channel. The capacitor isolation chip has the functions of anti-interference, anti-damage, and preventing the single-chip computer from burning out due to short circuit caused by wrong connection of the back-end. Compared with the use of optocouplers for isolation in the prior art, the use of capacitor isolation chips in this application can reduce the area occupied and reduce the cost of isolation.

[0045] The above-mentioned pulse signal includes 2n complementary PWM signals respectively used to control the magnetization and demagnetization of n electromagnet groups, wherein the i-th and i+1-th complementary PWM signals pass through the (i+1) / 2-th charging and demagnetization signal channel, the i-th capacitor isolation chip is used to isolate the i-th complementary PWM signal, and the i+1-th capacitor isolation chip is used to isolate the i+1-th complementary PWM signal.

[0046] In some examples, a photoelectric isolation chip may be used instead of a capacitive isolation chip. When a photoelectric isolation chip is used, 4n photoelectric isolation chips are required. Every two photoelectric isolation chips correspond to the first signal and the second signal of a complementary PWM signal, and are used to isolate the first signal and the second signal in the corresponding complementary PWM signal.

[0047] In some examples, the electromagnet charging and demagnetization control device further includes n photocouplers and n start channels, the (i+1) / 2th start channel connects the (i+1) / 2th output pin of the controller and the (i+1) / 2th input pin of the single-chip computer, and the (i+1) / 2th photocoupler is installed on the (i+1) / 2th start channel to isolate the magnetization signal sent by the controller on the (i+1) / 2th start channel. The above-mentioned photocoupler has the functions of anti-interference, anti-damage, and preventing the single-chip computer from burning out due to short circuit caused by wrong wiring in the back-end.

[0048] In some examples, the electromagnet charging and demagnetization control device further includes an independent first power supply circuit and a second power supply circuit. The first power supply circuit is electrically connected to the single-chip microcomputer and is used to power the single-chip microcomputer. The second power supply circuit is electrically connected to the H-bridge circuit and supplies power to the (i+1) / 2th electromagnet group through the (i+1) / 2th H-bridge circuit. By setting two separate power supply circuits, an adaptive voltage can be provided for the single-chip microcomputer and the electromagnet group, so that both are in the best working state.

[0049] In some examples, the first power supply circuit includes a DC / DC isolation switching power supply and an LDO linear voltage regulator chip, and the LDO linear voltage regulator chip is connected between the DC / DC isolation switching power supply and the power input pin of the microcontroller; the DC / DC isolation switching power supply is used to convert the 24V power supply into an isolated 5V voltage, and the LDO linear voltage regulator chip is used to step down the 5V voltage provided by the DC / DC isolation switching power supply to a stable 3.3V, so that the power supply fluctuation is smaller.

[0050] The second power supply circuit provides a rated voltage of 24V-100V. The specific voltage can be set according to the number of electromagnets in each electromagnet group, and is not specifically limited here. A filter and a fuse are provided in the second power supply circuit to provide a stable voltage for the electromagnet group and protect the circuit to prevent the second power supply circuit from being damaged due to short circuit or overload.

[0051] In the present application, two power supply circuits are set up to respectively power the single-chip microcomputer and the electromagnet group. Compared with the prior art in which only one power supply circuit is used and the rated voltage provided by the circuit cannot be easily changed in order to adapt to the single-chip microcomputer, the electromagnet group is provided with a power supply circuit independent of the single-chip microcomputer to power it, so that the rated voltage provided by the power supply circuit can be changed accordingly according to the specific number of electromagnets in the electromagnet group, thereby ensuring the magnetic attraction strength of the electromagnet charging and demagnetization control device.

[0052] In some examples, in order to facilitate operators to view and operate, the electromagnet charging and demagnetization control device provided by the present application may also include a display screen. The display screen is electrically connected to the single-chip microcomputer via a serial-to-parallel chip. The display screen is at least used to display the working mode selection control, and the working mode selection control is used to guide the selection of the demagnetization working mode. Obviously, other content can also be displayed on the display screen, such as language selection, restore default settings, version model, etc. In practical applications, the display content of the display screen can be set according to actual production needs. This application does not impose too many restrictions on the display content of the display screen. Preferably, the display screen adopts a digital tube display screen. Compared with the OLED display screen used in the prior art, the problem of the display screen being easily interfered with and burned in in an industrial environment is optimized.

[0053] In order to facilitate the operation of the operator, the electromagnet charging and demagnetization control device may also include a number of physical buttons, each of which is electrically connected to the single-chip microcomputer through an independent IO. The physical buttons mentioned here may include an upward control member, a downward control member, a confirmation control member, and a cancel control member. The physical buttons can be set according to actual needs, and this application does not impose too many restrictions on the number and type of physical buttons. In actual applications, each physical button cooperates with the display screen to complete some necessary parameter settings, such as the set language, the set working mode, etc. The working mode mentioned here usually refers to different demagnetization modes, and different demagnetization modes execute different demagnetization procedures.

[0054] In some examples, the electromagnet charging and demagnetization control device also includes a heat dissipation shell, which is composed of heat dissipation fins. Each switching element is attached to the heat dissipation shell. The heat dissipation shell is made of heat dissipation fins, so that after the heat dissipation fins absorb the heat of the switching elements, they can directly dissipate the heat into the air, thereby ensuring the heat dissipation effect of the heat dissipation shell.

[0055] To summarize, the electromagnet charging and demagnetization control device provided in the present application, through an independent half-bridge drive chip and an H-bridge circuit, enables the switching elements in the H-bridge circuit to be replaced according to actual needs, thereby achieving the adjustment of the Rds and the load voltage of the H-bridge circuit, reducing the heating condition of the switching elements, and further improving the heat dissipation effect of the switching elements by making a heat dissipation housing through heat dissipation fins, so that the switching elements can carry a larger current, and each electromagnet group can easily install 40 electromagnets. Compared with the prior art that uses an H-bridge integrated chip and can only accommodate five electromagnets in each electromagnet group, the number of electromagnets that can be loaded in the electromagnet charging and demagnetization control device is greatly increased.

[0056] The present application also discloses a handling device (not shown), which includes the above-mentioned electromagnet charging and demagnetization control device, and the handling device is used to pick up or release the tooling, and the tooling is used to press the welding strip against the battery cell; a magnetizable interaction part is provided on the tooling, and the handling device absorbs or releases the interaction part of the tooling through a plurality of electromagnet groups to pick up or release the tooling.

[0057] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. An electromagnet charging and demagnetization control device, characterized in that: The electromagnet charging and demagnetization control device comprises a single chip microcomputer, a controller, 2n half-bridge drive chips, n H-bridge circuits and n electromagnet groups, wherein: The controller is electrically connected to the single chip microcomputer to send a magnetization signal to the single chip microcomputer for instructing the (i+1) / 2th electromagnet group to be magnetized, where i is an odd number less than or equal to 2n, and n is a natural number; The single chip microcomputer is electrically connected to 2n half-bridge driver chips, wherein the i-th half-bridge driver chip is electrically connected to the switch element on one half-bridge branch in the (i+1) / 2-th H-bridge circuit, the i+1-th half-bridge driver chip is electrically connected to the switch element on the other half-bridge branch in the (i+1) / 2-th H-bridge circuit, and the (i+1) / 2-th electromagnet group is electrically connected to the (i+1) / 2-th H-bridge circuit; When the single chip microcomputer determines that the magnetization signal for instructing to magnetize the (i+1) / 2th electromagnet group has stopped, the switching state of each switching element in the (i+1) / 2th H-bridge circuit is changed through the i-th half-bridge driver chip and the i+1-th half-bridge driver chip to demagnetize the connected (i+1) / 2th electromagnet group.

2. The electromagnet charging and demagnetization control device according to claim 1, characterized in that: The electromagnet charging and demagnetization control device also includes an independent first power supply circuit and a second power supply circuit, the first power supply circuit is used to power the single chip microcomputer, and the second power supply circuit powers the (i+1) / 2th electromagnet group through the (i+1) / 2th H-bridge circuit.

3. The electromagnet charging and demagnetization control device according to claim 2, characterized in that: The first power supply circuit includes a DC / DC isolation switching power supply and an LDO linear voltage regulator chip, wherein the LDO linear voltage regulator chip is connected between the DC / DC isolation switching power supply and the power input pin of the single-chip microcomputer; the DC / DC isolation switching power supply is used to convert a 24V power supply into an isolated 5V voltage, and the LDO linear voltage regulator chip is used to step down the 5V voltage provided by the DC / DC isolation switching power supply to a stable 3.3V.

4. The electromagnet charging and demagnetization control device according to claim 2, characterized in that: The second power supply circuit provides a rated voltage of 24V-100V.

5. The electromagnet charging and demagnetization control device according to claim 1, characterized in that: The electromagnet charging and demagnetization control device also includes 2n capacitor isolation chips and n charging and demagnetization signal channels. The (i+1) / 2th charging and demagnetization signal channel electrically connects the (i+1) / 2th output pin of the single-chip computer with the i-th half-bridge drive chip and the i+1th half-bridge drive chip. The i-th capacitor isolation chip and the i+1th capacitor isolation chip are installed on the (i+1) / 2th charging and demagnetization signal channel to isolate the pulse signal sent by the single-chip computer on the (i+1) / 2th charging and demagnetization signal channel.

6. The electromagnet charging and demagnetization control device according to claim 5, characterized in that: The pulse signal includes 2n complementary PWM signals respectively used to control the magnetization and demagnetization of the n electromagnet groups, wherein: The i-th and i+1-th complementary PWM signals pass through the (i+1) / 2-th charging and demagnetization signal channel, the i-th capacitor isolation chip is used to isolate the i-th complementary PWM signal, and the i+1-th capacitor isolation chip is used to isolate the i+1-th complementary PWM signal.

7. The electromagnet charging and demagnetization control device according to claim 6, characterized in that: The switch element of each H-bridge circuit comprises a first transistor, a second transistor, a third transistor and a fourth transistor, wherein: The first transistor and the fourth transistor are located on one half-bridge branch of the H-bridge circuit and on one diagonal of the H-bridge circuit, and the second transistor and the third transistor are located on the other half-bridge branch of the H-bridge circuit and on the other diagonal of the H-bridge circuit; Each of the complementary PWM signals comprises a first signal and a second signal, the first signal of the i-th complementary PWM signal controls the first transistor of the (i+1) / 2-th H-bridge circuit, the second signal of the i-th complementary PWM signal controls the second transistor of the (i+1) / 2-th H-bridge circuit, the first signal of the i+1-th complementary PWM signal controls the fourth transistor of the (i+1) / 2-th H-bridge circuit, and the second signal of the i+1-th complementary PWM signal controls the third transistor of the (i+1) / 2-th H-bridge circuit; When the first signal of the i-th complementary PWM signal and the first signal of the i+1-th complementary PWM signal are at a high level, the first transistor and the fourth transistor are turned on, the second signal of the i-th complementary PWM signal and the second signal of the i+1-th complementary PWM signal are at a low level, the second transistor and the third transistor are turned off, and the (i+1) / 2-th electromagnet group is magnetized; When the second signal of the i-th complementary PWM signal and the second signal of the i+1-th complementary PWM signal are at a high level, the second transistor and the third transistor are turned on, the first signal of the i-th complementary PWM signal and the first signal of the i+1-th complementary PWM signal are at a low level, the first transistor and the fourth transistor are turned off, and the (i+1) / 2-th electromagnet group is demagnetized.

8. The electromagnet charging and demagnetization control device according to claim 1, characterized in that: The electromagnet charging and demagnetization control device also includes n photoelectric couplers and n start channels, the (i+1) / 2th start channel is connected to the (i+1) / 2th output pin of the controller and the (i+1) / 2th input pin of the single chip computer, and the (i+1) / 2th photoelectric coupler is installed on the (i+1) / 2th start channel to isolate the magnetization signal sent by the controller on the (i+1) / 2th start channel.

9. The electromagnet charging and demagnetization control device according to claim 1, characterized in that: The electromagnet charging and demagnetization control device also includes a display screen, which is electrically connected to the single-chip computer to at least display a working mode selection control, and the working mode selection control is used to guide the selection of a demagnetization working mode.

10. The electromagnet charging and demagnetization control device according to claim 9, characterized in that: The display screen adopts a digital tube display screen.

11. The electromagnet charging and demagnetization control device according to claim 1, characterized in that: The electromagnet charging and demagnetization control device further comprises a heat dissipation shell, the heat dissipation shell is composed of heat dissipation fins, and each of the switch elements is mounted on the heat dissipation shell.

12. A handling device, characterized in that: The handling equipment comprises the electromagnet charging and demagnetization control device as claimed in any one of claims 1 to 11, and the handling equipment is used to pick up or release the tooling, and the tooling is used to press the welding ribbon against the battery cell; The tooling is provided with a magnetizable interaction part, and the handling equipment absorbs or releases the interaction part of the tooling through a plurality of electromagnet groups to pick up or release the tooling.

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