A collaborative control system for series formation and component inspection of cylindrical batteries

Abstract

The application discloses a kind of for cylindrical battery series formation and the collaborative control system of content, including bidirectional conversion circuit, multiple battery switch circuits and control system.The input of the bidirectional conversion circuit is connected with formation and content power supply, when charging cylindrical battery, the bidirectional conversion circuit is used to convert the voltage of formation and content power supply into charging voltage for charging cylindrical battery.In the discharge of cylindrical battery, the bidirectional conversion circuit is used to convert the direct current of cylindrical battery into formation and content power supply voltage;Multiple battery switch circuits are connected with the bidirectional conversion circuit.The control system is used to control the bidirectional conversion circuit and the battery switch circuit work.Wherein, each battery switch circuit is used to connect multiple cylindrical batteries in series, to constitute the series loop for series formation and content;The battery switch circuit can access any cylindrical battery into series loop, and can exit any cylindrical battery from series loop.

Description

Technical Field

[0001] This invention relates to the field of cylindrical battery manufacturing technology, and more specifically to a collaborative control system for series-connected capacity and separation of cylindrical batteries. Background Technology

[0002] Large cylindrical batteries are highly favored by the market due to their superior performance and cost advantages, attracting numerous companies to actively invest in them. 18650 and 21700 type cylindrical batteries have wide applications, and in recent years, large cylindrical batteries have become a new focus in the power battery field. With the rapid development of large cylindrical power batteries, the demand for efficient and reliable formation and capacity testing equipment has also increased significantly.

[0003] Compared to traditional parallel-connection typesetting and capacity testing technology, series-connection typesetting and capacity testing technology involves connecting multiple batteries in series and using the same charging and discharging power supply for production. Series-connection typesetting and capacity testing technology offers significant advantages such as high charging and discharging efficiency, good battery consistency, and fast calibration and measurement. It has been widely used in prismatic (including blade) and pouch battery production lines and is an industry-leading technology.

[0004] However, because large cylindrical batteries are smaller than prismatic and pouch batteries, the number of large cylindrical batteries in a single tray during the formation and capacity testing process is much greater on automated production lines for cylindrical batteries. Common tray sizes include 256, 324, and 576 batteries, which presents a significant challenge to the design of the formation and capacity testing system architecture. Summary of the Invention

[0005] To overcome the above-mentioned technical defects, the present invention provides a collaborative control system for series formation and capacity testing of cylindrical batteries.

[0006] To solve the above problems, the present invention is implemented according to the following technical solution:

[0007] The present invention provides a collaborative control system for series-connected capacity formation of cylindrical batteries, comprising:

[0008] A bidirectional conversion circuit is provided, the input of which is connected to a capacity-forming power supply. When charging a cylindrical battery, the bidirectional conversion circuit is used to convert the voltage of the capacity-forming power supply into a charging voltage for charging the cylindrical battery; when discharging a cylindrical battery, the bidirectional conversion circuit is used to convert the DC current of the cylindrical battery into the capacity-forming power supply voltage.

[0009] Multiple battery switch circuits, wherein the multiple battery switch circuits are connected to the bidirectional conversion circuit;

[0010] A control system is connected to the bidirectional conversion circuit and the battery switch circuit respectively, and the control system is used to control the operation of the bidirectional conversion circuit and the multiple battery switch circuits.

[0011] Each of the battery switch circuits is used to connect multiple cylindrical batteries in series to form a series circuit for capacity testing; the battery switch circuit can connect any cylindrical battery into the series circuit and can remove any cylindrical battery from the series circuit.

[0012] Preferably, each of the battery switch circuits can connect 2 to 160 cylindrical batteries in series.

[0013] Preferably, the battery switching circuit includes:

[0014] Multiple switch control circuits are used to connect multiple batteries in series to form a series circuit; each switch control circuit includes a direct circuit switch and a bypass switch, the direct circuit switch is connected in series with a cylindrical battery, and the bypass switch is connected in parallel with the series direct circuit switch and the cylindrical battery.

[0015] When a direct circuit switch of a switch control circuit is closed and a bypass switch is open, the corresponding cylindrical battery is connected in a series circuit.

[0016] When the direct circuit switch of a switching control circuit is opened and the bypass switch is closed, the corresponding cylindrical battery is removed from the series circuit.

[0017] Preferably, the battery switch circuit includes multiple detection modules, one of which is used to detect the voltage and temperature of the 16 cylindrical batteries.

[0018] Preferably, the battery switching circuit includes:

[0019] A voltage boosting unit is connected in the series circuit and is used to boost the voltage of the series circuit.

[0020] The control system controls the voltage boosting unit according to the operating state of the battery switching circuit.

[0021] Preferably, the collaborative control system further includes:

[0022] A press control device is connected to the control system; the press control device has at least one press.

[0023] The press has multiple sets of probes, and the press is used to place and connect cylindrical batteries through the probes; the probes of the press are connected to the battery switching circuit.

[0024] The control system coordinates the control of the press control unit and multiple battery switch circuits.

[0025] Preferably, the collaborative control system further includes:

[0026] A control bus is used to connect the bidirectional converter circuit, multiple battery switch circuits, voltage boosting units of the battery switch circuits, and press control device to the control system, so that the control system can coordinately control the bidirectional converter circuit, multiple battery switch circuits, voltage boosting units of the battery switch circuits, and press control device.

[0027] Preferably, the bidirectional conversion circuit includes an AC module and multiple DC modules connected to the AC module, with each DC module corresponding to a battery switch circuit.

[0028] The collaborative control system further includes an AC / DC monitoring system, which sends the operating status of the bidirectional conversion circuit to the control system in real time. The control system then coordinates the operation of multiple battery switching circuits based on the operating status of the bidirectional conversion circuit.

[0029] Preferably, the collaborative control system further includes:

[0030] A monitoring center, which is connected to the control system, is used to monitor the operating status of the detection system.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] This invention provides a coordinated control system for series formation and capacity testing of cylindrical batteries, including a bidirectional conversion circuit, multiple battery switching circuits, and a control system. The input terminal of the bidirectional conversion circuit is connected to the formation and capacity testing power supply. When charging the cylindrical battery, the bidirectional conversion circuit converts the voltage of the formation and capacity testing power supply into a charging voltage for the cylindrical battery. When discharging the cylindrical battery, the bidirectional conversion circuit converts the DC current of the cylindrical battery into the formation and capacity testing power supply voltage. The multiple battery switching circuits are connected to the bidirectional conversion circuit. The control system is connected to both the bidirectional conversion circuit and the battery switching circuits, and controls their operation. Each battery switching circuit connects multiple cylindrical batteries in series to form a series circuit for series formation and capacity testing; the battery switching circuit can connect any cylindrical battery to the series circuit and can disconnect any cylindrical battery from the series circuit.

[0033] This invention employs an innovative combination of bidirectional conversion circuits, multiple battery switching circuits, and a control system to meet the efficient series connection and unified charging and discharging requirements of a large number of large cylindrical batteries. The collaborative control system can manage a large number of cylindrical batteries undergoing series formation and capacity testing, and significantly improves charging and discharging efficiency, making it suitable for the formation and capacity testing needs of large-scale cylindrical battery production lines.

[0034] This invention manages multiple battery switching circuits through a single control system to control two or more series circuits used for the series conversion and capacity testing of multiple cylindrical batteries. The single control system achieves high-precision control of multiple current and voltage inputs, ensuring consistency for each cylindrical battery throughout the charging and discharging process, and allowing the battery to immediately disconnect when any cylindrical battery meets the cutoff condition without affecting the normal operation of other cylindrical batteries. Attached Figure Description

[0035] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0036] Figure 1 This is a schematic diagram of the structural framework of the collaborative control system of the present invention. Figure 1 ;

[0037] Figure 2 This is a schematic diagram of the structural framework of the collaborative control system of the present invention. Figure 2 ;

[0038] Figure 3 This is a partial structural connection diagram of the collaborative control system of the present invention;

[0039] Figure 4 This is a schematic diagram of the structural connection of the single battery switch circuit of the present invention on the AC busbar;

[0040] Figure 5 This is a schematic diagram of the structural connection of the single battery switch circuit of the present invention on the DC bus;

[0041] Figure 6 and Figure 7 This is a schematic diagram of the electrical principle of the cylindrical battery of the present invention under two different placement conditions;

[0042] Figure 8 and Figure 9 This is a circuit diagram illustrating specific implementations of the cylindrical battery of the present invention under two different placement conditions. Detailed Implementation

[0043] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0044] Compared to traditional parallel-connection typesetting and capacity testing technology, series-connection typesetting and capacity testing technology involves connecting multiple batteries in series and using the same charging and discharging power supply for production. Series-connection typesetting and capacity testing technology offers significant advantages such as high charging and discharging efficiency, good battery consistency, and fast calibration and measurement. It has been widely used in prismatic (including blade) and pouch battery production lines and is an industry-leading technology.

[0045] However, due to the smaller size of large cylindrical batteries compared to prismatic and pouch batteries, the number of large cylindrical batteries required for formation and capacity testing equipment of comparable size has surged. During series formation and capacity testing, conventional techniques struggle to effectively connect and uniformly charge and discharge a large number of large cylindrical batteries, posing a significant challenge to the design of the formation and capacity testing system architecture. Therefore, a new control system is urgently needed to overcome the technical difficulties of series formation and capacity testing of cylindrical batteries and achieve more efficient battery management.

[0046] To address this, the present invention employs an innovative combination of a bidirectional conversion circuit, multiple battery switching circuits, and a control system to meet the efficient series connection and unified charging and discharging requirements of a large number of large cylindrical batteries. The collaborative control system can manage a large number of cylindrical batteries undergoing series formation and capacity testing, and significantly improves charging and discharging efficiency, making it suitable for the formation and capacity testing needs of large-scale cylindrical battery packs.

[0047] Example 1

[0048] like Figure 1 and Figure 2 As shown, Embodiment 1 of the present invention provides a collaborative control system for series formation and capacity testing of cylindrical batteries, including a bidirectional conversion circuit, multiple battery switching circuits, and a control system. The input terminal of the bidirectional conversion circuit is connected to the formation and capacity testing power supply. When charging the cylindrical battery, the bidirectional conversion circuit converts the voltage of the formation and capacity testing power supply into a charging voltage for charging the cylindrical battery. When discharging the cylindrical battery, the bidirectional conversion circuit converts the DC current of the cylindrical battery into the formation and capacity testing power supply voltage. Multiple battery switching circuits are connected to the bidirectional conversion circuit. The control system is connected to both the bidirectional conversion circuit and the battery switching circuits, and controls the operation of both circuits. Each battery switching circuit connects multiple cylindrical batteries in series to form a series circuit for series formation and capacity testing; the battery switching circuit can connect any cylindrical battery to the series circuit and can remove any cylindrical battery from the series circuit.

[0049] This invention manages multiple battery switching circuits through a single control system to control two or more series circuits used for the series conversion and capacity testing of multiple cylindrical batteries. The single control system achieves high-precision control of multiple current and voltage inputs, ensuring consistency for each cylindrical battery throughout the charging and discharging process, and allowing the battery to immediately disconnect when any cylindrical battery meets the cutoff condition without affecting the normal operation of other cylindrical batteries.

[0050] In a preferred embodiment, each battery switch circuit can connect 2 to 160 cylindrical batteries in series. This technology can achieve series formation and capacity testing of up to 160 cylindrical batteries, manage a large number of series-connected batteries, significantly improve charging and discharging efficiency, and is suitable for the formation and capacity testing requirements of large-scale battery packs.

[0051] Each series loop in the architecture can support up to 160 batteries, and multiple series loops can achieve coordinated control. The system adopts a modular design, with one series control and sampling module (lower-level machine) for every 16 channels. All modules work closely with the middle-level machine to ensure that the charging and discharging process of the entire battery pack is stable and efficient.

[0052] Understandably, multi-series loop coordinated control technology can manage two or more series loops through the same control system, ensuring the accuracy and consistency of cylindrical battery packs during formation and capacity testing. Each cylindrical battery in a series loop undergoes charging and discharging operations strictly according to the same process flow, and the system can guarantee the synchronous execution of all steps, thereby ensuring consistent performance of cylindrical batteries throughout the entire formation and capacity testing production line.

[0053] In one specific implementation, the battery switching circuit includes:

[0054] Multiple switch control circuits are used to connect multiple batteries in series to form a series circuit; each switch control circuit includes a direct circuit switch and a bypass switch, the direct circuit switch is connected in series with a cylindrical battery, and the bypass switch is connected in parallel with the series direct circuit switch and the cylindrical battery.

[0055] Specifically, when the direct circuit switch of a switch control circuit is closed and the bypass switch is open, the corresponding cylindrical battery is connected to the series circuit; when the direct circuit switch of a switch control circuit is open and the bypass switch is closed, the corresponding cylindrical battery is removed from the series circuit.

[0056] In one specific implementation, the battery switch circuit includes multiple detection modules, one of which is used to detect the voltage and temperature of 16 cylindrical batteries.

[0057] like Figure 1 As shown, the battery switching circuit includes a voltage boosting unit connected in the series circuit. The voltage boosting unit is used to increase the voltage of the series circuit. The control system controls the voltage boosting unit according to the operating state of the battery switching circuit.

[0058] Understandably, the control system will decide whether to adjust the operation of the voltage boosting unit based on the circuit's operating status, such as putting the boosting unit on or off, to adapt to different operating conditions.

[0059] Furthermore, the collaborative control system also includes a press control device connected to the control system; the press control device has at least one press. The press has multiple sets of probes, and the press is used to place and connect cylindrical batteries via the probes; the probes of the press are connected to the battery switching circuit. The control system collaboratively controls the press control unit and multiple battery switching circuits.

[0060] In this field, a press is a tooling device used to load batteries and make contact with them via probes.

[0061] Preferably, the collaborative control system further includes a control bus, which is used to connect the bidirectional conversion circuit, multiple battery switch circuits, voltage boosting unit of the battery switch circuit, and press control device to the control system, so that the control system can collaboratively control the bidirectional conversion circuit, multiple battery switch circuits, voltage boosting unit of the battery switch circuit, and press control device.

[0062] Through the control bus, the control system can simultaneously control multiple different circuits and devices to achieve more efficient and coordinated operation.

[0063] In one specific implementation, the bidirectional conversion circuit includes an AC module and multiple DC modules connected to the AC module, with each DC module corresponding to a battery switch circuit.

[0064] The collaborative control system further includes an AC / DC monitoring system, which sends the operating status of the bidirectional conversion circuit to the control system in real time. The control system then coordinates the operation of multiple battery switching circuits based on the operating status of the bidirectional conversion circuit.

[0065] The collaborative control principle employed in this invention is as follows: the system monitors various operating values ​​of the battery in real time through a sampling module and compares them with preset cutoff conditions. When a battery in a certain branch meets the preset cutoff condition, the series branch to which that battery belongs is controlled via a high-speed communication architecture to immediately exit the charging and discharging process without affecting other branches or other batteries in the same branch, ensuring that the battery strictly follows the set charging and discharging process. Through the collaborative control of multiple loops, the system can maintain efficient operation under different process conditions, improving production efficiency and reducing production energy consumption.

[0066] In this invention, the conversion capacity power supply includes connected AC power grid, distribution cabinet and busbar, etc., and the busbar is connected to the bidirectional conversion circuit.

[0067] In specific implementations, the busbar includes an AC busbar and a DC busbar. When the busbar is AC, the bidirectional conversion circuit includes an AC-DC module and multiple DC-DC modules, with each DC-DC module connected to a corresponding battery switch circuit. When the busbar is DC, the bidirectional conversion circuit includes multiple DC-DC modules, with each DC-DC module directly connected to a battery switch circuit. The bidirectional conversion circuit supports a high-voltage busbar voltage range of 600V to 800V, thus adapting to different application requirements.

[0068] Example 2

[0069] This second embodiment provides a cooperative control system, whose system architecture and working principle are exactly the same as those of the first embodiment. Based on the first embodiment, this second embodiment provides a cooperative control system that includes multiple polarity switching circuits.

[0070] In a preferred embodiment, the present invention further includes a plurality of polarity switching circuits, each polarity switching circuit having two input terminals and two output terminals, and the two input terminals of the polarity switching circuit being connected to the two output terminals of the bidirectional conversion circuit.

[0071] The two output terminals of one polarity switching circuit are respectively connected to the input terminal of one battery switching circuit; the polarity switching circuit has a first operating state and a second operating state.

[0072] In the first operating state, the polarity switching circuit outputs a positive voltage to the battery switching circuit for the cylindrical battery in the series circuit to perform capacity testing.

[0073] In the second operating state, the polarity switching circuit outputs a negative voltage to the battery switching circuit for the formation and capacity testing of cylindrical batteries with opposite polarities in the series circuit.

[0074] The polarity switching circuit of this invention enables the collaborative control system to be applicable in situations where the polarity of a whole or part of the cylindrical batteries is reversed due to cylindrical battery reconfiguration or assembly, thus meeting the needs of large-scale production lines. The connection method between the cylindrical batteries and the needle bed is divided into positive and negative polarity operation modes. In the case of reversed cylindrical battery connection, it is not necessary to readjust the battery orientation; instead, the process of forming and capacity testing is completed according to the positive and negative polarities of the cylindrical batteries. It can be understood that this invention can perform forming and capacity testing on positive and negative polarity cylindrical batteries separately using the same equipment, eliminating the need to adjust the polarity when the battery polarity is reversed, saving time and equipment investment. It effectively solves the compatibility problem of reversed polarity in a whole or part of the cylindrical batteries during reconfiguration or assembly, improving work efficiency.

[0075] In one specific embodiment of the present invention, the polarity switching circuit includes:

[0076] The first bridge arm includes an upper bridge arm K1 and a lower bridge arm K3 connected in series.

[0077] The second bridge arm includes an upper half bridge arm K2 and a lower half bridge arm K4 connected in series, and the second bridge arm is connected in parallel with the first bridge arm.

[0078] In a preferred embodiment, both the upper and lower halves of the first bridge arm are relays or controllable switching transistors; wherein, when the controllable switching transistor contains a diode, the upper and lower halves of the first bridge arm are connected in series in the same direction, and the diodes in the upper and lower halves of the first bridge arm are in the same direction.

[0079] In a preferred embodiment, both the upper and lower halves of the second bridge arm are relays or controllable switching transistors. When the controllable switching transistor contains a diode, the upper and lower halves of the second bridge arm are connected in series in the same direction, and the diodes in the upper and lower halves of the second bridge arm are also in the same direction.

[0080] Specifically, the first bridge arm and the second bridge arm are the same. The upper half bridge arm K1 and the lower half bridge arm K3 of the first bridge arm are both controllable switching transistors with anti-parallel diodes. The upper half bridge arm K1 and the lower half bridge arm K3 of the first bridge arm are connected in series in the same direction.

[0081] The upper half arm K2 and the lower half arm K4 of the second bridge arm are both controllable switching transistors with anti-parallel diodes, and the upper half arm K2 and the lower half arm K4 of the second bridge arm are connected in series in the same direction.

[0082] Among them, such as Figures 4-6 As shown, one output terminal of the bidirectional converter circuit is connected to the connection point between the upper half-bridge arm K1 and the lower half-bridge arm K3 of the first bridge arm; the other output terminal of the bidirectional converter circuit is connected to the connection point between the upper half-bridge arm K2 and the lower half-bridge arm K4 of the second bridge arm.

[0083] One input terminal of the battery switch circuit is connected to the connection point between the upper half-bridge arm K1 of the first bridge arm and the upper half-bridge arm K2 of the second bridge arm; the other input terminal of the battery switch circuit is connected to the connection point between the lower half-bridge arm K3 of the first bridge arm and the lower half-bridge arm K3 of the second bridge arm.

[0084] Regarding the operating principle of the polarity switching circuit of this invention, in the first operating state, the upper half of the first bridge arm and the lower half of the second bridge arm are connected, and the lower half of the first bridge arm and the upper half of the second bridge arm are disconnected, thereby outputting a positive voltage to the battery switching circuit. In the second operating state, the lower half of the first bridge arm and the upper half of the second bridge arm are connected, and the upper half of the first bridge arm and the lower half of the second bridge arm are disconnected, thereby outputting a negative voltage to the battery switching circuit.

[0085] In a preferred embodiment, the control system of the present invention is connected to a plurality of the polarity switching circuits and a plurality of battery switching circuits respectively.

[0086] Furthermore, the battery switching circuit includes multiple detection modules for detecting the voltage and temperature of the cylindrical battery. The control system controls the polarity switching circuit to switch between a first operating state and a second operating state based on the cylindrical battery voltage signal sent by the detection modules.

[0087] In one specific implementation, the detection module includes a voltage detection circuit, a temperature sensor, etc., which are conventional techniques in this field. One such detection module is used to detect the voltage and temperature of 16 cylindrical batteries.

[0088] Specifically, the control system is used to control the polarity switching circuit. Specifically, it is achieved by instructing the upper half-bridge arm K1 and the lower half-bridge arm K3 of the first bridge arm to be turned on / off, and by instructing the upper half-bridge arm K2 and the lower half-bridge arm K4 of the second bridge arm to be turned on / off.

[0089] In one specific implementation, a bidirectional converter circuit is used to connect to the AC bus. The bidirectional converter circuit includes an AC-DC module and a DC-DC module, with the DC-DC module connected to the AC-DC module. Specifically, the DC-DC module is connected to a polarity switching circuit, which is connected to the battery switching circuit.

[0090] In this field, when the bus connected to the bidirectional converter circuit is a three-phase AC power supply, the AC-DC module converts AC power to DC power and also provides overcurrent and overvoltage protection. The main function of the DC-DC module is to convert one DC voltage to another. The DC-DC module raises or lowers the input DC voltage to the required output voltage level, which enables the equipment to adapt to different power requirements or load demands, providing a flexible, stable and reliable power solution for the detection system and meeting the application requirements of different voltage requirements.

[0091] In specific implementation, multiple switch control circuits are used to connect multiple cylindrical batteries in series to form a series circuit; each switch control circuit includes a direct circuit switch and a bypass switch, with the direct circuit switch connected in series with one cylindrical battery, and the bypass switch connected in parallel with the series-connected direct circuit switch and the cylindrical battery.

[0092] When a direct circuit switch of a switch control circuit is closed and a bypass switch is open, the corresponding cylindrical battery is connected in a series circuit.

[0093] When the direct circuit switch of a switching control circuit is opened and the bypass switch is closed, the corresponding cylindrical battery is removed from the series circuit.

[0094] like Figures 4-7 As shown, the battery switch circuit of the present invention includes multiple direct switches Kn1 to K11 and multiple bypass switches Kn2 to K12.

[0095] In this circuit, one bypass switch corresponds to an adjacent direct circuit switch and a cylindrical battery connected in parallel. When the adjacent direct circuit switch corresponding to a cylindrical battery is closed and the corresponding bypass switch is open, the cylindrical battery is connected to the series circuit. When the adjacent direct circuit switch corresponding to a cylindrical battery is open and the corresponding bypass switch is closed, the cylindrical battery is removed from the series circuit.

[0096] In practice, the direct circuit switch and bypass switch can be made of relays, electronic switches, etc., to enable the connection and disconnection of cylindrical batteries.

[0097] The control system is connected to the battery switch circuit. The control system controls the direct circuit switch and bypass switch of the battery switch circuit to enable the cylindrical battery to enter and exit the series circuit.

[0098] In one specific implementation, in the first operating state, the polarity switching circuit outputs a positive voltage to the battery switching circuit. Some cylindrical batteries with polarity opposite to the positive voltage are disconnected from the series circuit by opening the corresponding direct circuit switch and closing the corresponding bypass switch; some cylindrical batteries with polarity the same as the positive voltage continue to operate normally.

[0099] In the second operating state, the polarity switching circuit outputs a negative voltage to the battery switching circuit. Some cylindrical batteries with the opposite polarity to the negative voltage are disconnected from the series circuit by opening the corresponding direct circuit switch and closing the corresponding bypass switch; some cylindrical batteries with the same polarity as the negative voltage continue to operate normally.

[0100] In one specific implementation, the control system is equipped with a cutoff condition. When the cutoff condition is met, the direct circuit switch corresponding to a certain cylindrical battery opens, and the corresponding bypass switch closes, causing the cylindrical battery to exit the series circuit. The cutoff condition includes, but is not limited to, voltage reaching a set voltage, time reaching a set time, fault occurrence, or alarm conditions being met. After the bypass switch is closed, the cylindrical battery to be tested for capacity determination is removed from the series circuit.

[0101] In practice, the testing system also includes a monitoring center, which is connected to the control system and used to monitor the operating status of the testing system. When a fault occurs during the operation of the testing system, an alarm will be issued promptly.

[0102] In a specific implementation of the present invention, the detection system further includes a pressing device, which includes a probe or a clamp. The probe or clamp is connected to the control system via a cable. The control system probe or clamp is connected to the cylindrical battery to be tested for capacity and composition, so as to connect the cylindrical battery to be tested for capacity and composition into a series circuit. It can be understood that the pressing device is used to contact the cylindrical battery to form an electrical circuit, so as to realize the connection between the above-mentioned functional circuits and the cylindrical battery.

[0103] The present invention discloses a collaborative control system in which, when the collaborative control system is running, the control system controls the pressing device to contact the cylindrical battery to be processed for capacity testing, and connects the cylindrical battery to be processed for capacity testing into a series circuit. At the same time, the detection module in the series circuit of the cylindrical battery detects the voltage of the cylindrical battery and sends the detection result to the control system. The control system controls the bridge arm of the polarity switching circuit to operate according to the detection result.

[0104] In this way, regardless of which end the positive terminal of the cylindrical battery to be tested for capacity and separation is on, the positive output terminal of the bidirectional conversion circuit can be connected to the positive terminal of the cylindrical battery to be tested for capacity and separation, and the negative output terminal can be connected to the negative terminal of the cylindrical battery to be tested for capacity and separation. This allows for polarity switching during actual use and is applicable to situations where the polarity of the cylindrical battery is reversed due to changes in cylindrical battery type or cylindrical battery pack assembly, thus meeting the needs of large-scale production line manufacturing.

[0105] The working principle of the collaborative control system of the present invention is as follows: the control system controls the probe or clamp of the pressing device to connect to the electrode of the cylindrical battery. The detection module detects the voltage of the cylindrical battery and sends the detection result to the control system. The control system sends the control command to the polarity switching circuit. The polarity conversion cable controls different bridge arms to open and close according to the different polarities of the cylindrical battery. At the same time, all direct circuit switches are closed and bypass switches are open. The bidirectional conversion circuit charges and discharges the cylindrical battery. When the voltage reaches the set voltage or the time reaches the set time, the bypass switch is closed and the direct circuit switch is open. The cylindrical battery exits the series main circuit. The control system controls the probe or clamp to separate from the electrode of the cylindrical battery.

[0106] Throughout the process, the set voltage or set time of the cylindrical battery voltage is set by the control system and controlled throughout the entire process. At the same time, the monitoring unit monitors the system to ensure normal operation. Even when the cylindrical battery is reversed, there is no need to readjust the direction of the cylindrical battery. The equipment automatically determines the positive and negative polarities of the cylindrical battery and completes the formation and capacity testing process, saving time and improving efficiency.

[0107] The control system can realize the functional regulation of the entire detection system. The functions of the control system include, but are not limited to, system control and information acquisition, information interaction with the monitoring center, and interactive control and command transmission with bidirectional conversion circuit, cylindrical battery series circuit, pressing device, etc.

[0108] In specific implementation, refer to Figure 6 and Figure 7 These are two different ways of arranging cylindrical batteries. As you can see, regardless of the battery's arrangement, closing the corresponding switch will always connect the positive terminal of the cylindrical battery to the positive terminal of the bidirectional converter circuit. Figure 6 As shown, during the pressing of the cylindrical batteries, the detection module detects the voltage of each channel of the cylindrical battery. When all the cylindrical battery voltages are positive, the cylindrical battery is positive polarity. At this time, the control system controls the polarity switching module to close the first switch K1 and the fourth switch K4, and the current flows as follows. Figure 6 As shown, the positive terminal of the bidirectional converter circuit is connected to the positive terminal of the cylindrical battery. The cylindrical batteries to be tested for capacity formation are BATn to BAT1. Each cylindrical battery BATn to BAT1 is connected in series with a direct circuit switch Kn1 to K11. The positive terminal of the bidirectional converter circuit charges and discharges the cylindrical batteries BATn to BAT1 through the closed direct circuit switch Kn1 to K11. Each cylindrical battery and the direct circuit switch are connected in parallel with a bypass switch. The function of the bypass switches Kn2 to K12 is to remove the cylindrical battery from the series main circuit when the voltage of the cylindrical battery reaches the cutoff condition, that is, to open the main circuit switch Kn1 to K11 and close Kn2 to K12. The same applies when the discharge of the cylindrical battery reaches the cutoff condition. The cutoff condition includes, but is not limited to, the voltage reaching the set voltage, or the time reaching the set time, or the fault or alarm condition being reached.

[0109] like Figure 9 The diagram shows another arrangement of cylindrical batteries. When the cylindrical batteries are pressed together, the detection module monitors the voltage of each channel. When all cylindrical battery voltages are negative, the cylindrical battery is of negative polarity. At this time, the control system controls the polarity switching module to close the second switch K2 and the third switch K3, and the current flows as shown... Figure 9 As shown, the positive terminal of the bidirectional converter circuit is still connected to the positive terminal of the cylindrical battery.

[0110] This invention provides a collaborative control system applicable to situations where the polarity of cylindrical batteries is reversed due to reconfiguration or assembly, adapting to the needs of large-scale production lines. The connection between the cylindrical batteries and the needle bed is divided into positive and negative polarity modes. During battery pressing, the internal detection module of the switch module detects whether the battery voltage is positive or negative. After detection, the result is sent to the control system, which then sends the switch control logic to the switch module and the polarity switching module. The switch control block and the polarity switching module then open or close the switch. Compared with existing technologies, this design eliminates the need to readjust the battery orientation when the cylindrical batteries are reversed. The equipment automatically determines the positive or negative polarity and completes the formation and capacity testing process. The same equipment can perform formation and capacity testing on both positive and negative polarity cylindrical batteries separately. Polarity adjustment is not required when the battery polarity is reversed, saving time and equipment investment. This collaborative control system effectively solves the compatibility problem of reversed polarity in the entire or partial battery pack during reconfiguration or assembly, improving work efficiency.

[0111] The core of this system architecture is the control system of the central control unit. Each circuit module collects information from individual batteries in real time, including voltage and temperature. The control system communicates via fieldbus, enabling the central control unit to collect data such as voltage, current, and temperature of each battery in the series-connected battery pack in real time. This ensures precise constant current and constant voltage control of each battery under any operating condition, and coordinates the charging and discharging operations of multiple series-connected battery branches. The central control unit also has overvoltage, overcurrent, and overheat detection functions, which can respond quickly when necessary to protect the safety of the batteries and the system.

[0112] On the other hand, this invention employs a modular design, giving the system a high degree of scalability. Depending on different application requirements, the system's scale and configuration can be flexibly adjusted by adding or removing corresponding battery switching circuits, etc. This system is particularly suitable for the formation and capacity testing of large-scale cylindrical batteries. In practical applications, the system can be flexibly configured according to the size and characteristics of the battery pack to meet various complex charging and discharging requirements. Furthermore, the modular design of the system also supports future technology updates, such as adding new power modules or optimizing control algorithms, to further improve system performance.

[0113] Other structures of the collaborative control system for series division and capacity testing of cylindrical batteries described in this embodiment are available in the prior art.

[0114] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A collaborative control system for series-connected capacity formation of cylindrical batteries, characterized in that, include: A bidirectional converter circuit, wherein the input terminal of the bidirectional converter circuit is connected to a power supply that has been converted into a capacitive power supply; Multiple battery switch circuits, wherein the multiple battery switch circuits are connected to the bidirectional conversion circuit; A control system, wherein the control system is used to control the operation of the bidirectional conversion circuit and the plurality of battery switch circuits; The battery switching circuit includes multiple switch control circuits, which are used to connect multiple cylindrical batteries in series to form a series circuit; each switch control circuit includes a direct circuit switch and a bypass switch, with the direct circuit switch connected in series with one cylindrical battery, and the bypass switch connected in parallel with the series direct circuit switch and the cylindrical battery. Multiple polarity switching circuits, wherein the two input terminals of each polarity switching circuit are connected to the two output terminals of the bidirectional conversion circuit; The two output terminals of one polarity switching circuit are respectively connected to the input terminal of one battery switching circuit; the polarity switching circuit has a first operating state and a second operating state. In the first operating state, the polarity switching circuit outputs a positive voltage to the battery switching circuit. Some cylindrical batteries with the opposite polarity to the positive voltage are disconnected from the series circuit by opening the corresponding direct circuit switch and closing the corresponding bypass switch; some cylindrical batteries with the same polarity as the positive voltage continue to operate normally. In the second operating state, the polarity switching circuit outputs a negative voltage to the battery switching circuit. Some cylindrical batteries with the opposite polarity to the negative voltage are disconnected from the series circuit by opening the corresponding direct circuit switch and closing the corresponding bypass switch; some cylindrical batteries with the same polarity as the negative voltage continue to operate normally. The polarity switching circuit includes: a first bridge arm, which includes an upper half bridge arm and a lower half bridge arm connected in series; and a second bridge arm, which includes an upper half bridge arm and a lower half bridge arm connected in series, and the second bridge arm is connected in parallel with the first bridge arm. The control system is used to control the polarity switching circuit to switch between a first operating state and a second operating state. This is achieved by controlling the conduction / closure of the upper and lower half of the first bridge arm and the upper and lower half of the second bridge arm through commands.

2. The collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 1, characterized in that: Each of the aforementioned battery switch circuits can connect 2 to 160 cylindrical batteries in series.

3. A collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 1, characterized in that: When a direct circuit switch of a switching control circuit is closed and a bypass switch is open, the corresponding cylindrical battery is connected in a series circuit. When the direct circuit switch of a switching control circuit is opened and the bypass switch is closed, the corresponding cylindrical battery is removed from the series circuit.

4. A collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 3, characterized in that: The battery switch circuit includes multiple detection modules, one of which is used to detect the voltage and temperature of 16 cylindrical batteries.

5. A collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 4, characterized in that, The battery switching circuit includes: A voltage boosting unit is connected in the series circuit and is used to boost the voltage of the series circuit. The control system controls the voltage boosting unit according to the operating state of the battery switching circuit.

6. A collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 5, characterized in that, The collaborative control system also includes: A press control device is connected to the control system; the press control device has at least one press. The press has multiple sets of probes, and the press is used to place and connect cylindrical batteries through the probes; the probes of the press are connected to the battery switching circuit. The control system coordinates the control of the press control device and multiple battery switch circuits.

7. A collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 6, characterized in that, The collaborative control system also includes: A control bus is used to connect the bidirectional converter circuit, multiple battery switch circuits, voltage boosting units of the battery switch circuits, and press control device to the control system, so that the control system can coordinately control the bidirectional converter circuit, multiple battery switch circuits, voltage boosting units of the battery switch circuits, and press control device.

8. A collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 7, characterized in that: The bidirectional conversion circuit includes an AC module and multiple DC modules connected to the AC module, with each DC module corresponding to a battery switch circuit. The collaborative control system further includes an AC / DC monitoring system, which sends the operating status of the bidirectional conversion circuit to the control system in real time. The control system then coordinates the operation of multiple battery switching circuits based on the operating status of the bidirectional conversion circuit.

9. A collaborative control system for series formation and capacity testing of cylindrical batteries according to claim 1, characterized in that, Also includes: A monitoring center, which is connected to the control system, is used to monitor the operating status of the detection system.

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