Storage battery charging and discharging device and voltage acquisition and voltage division module

Abstract

The utility model discloses a storage battery charging and discharging device, which comprises a positive and negative series connection type silicon controlled rectifier module, a storage battery positive and negative electrode series connection point interchange module and a semi-open and semi-closed trigger type silicon controlled rectifier trigger module, the positive and negative series connection type silicon controlled rectifier module is connected with the storage battery positive and negative electrode series connection point interchange module and the semi-open and semi-closed trigger type silicon controlled rectifier trigger module, and the storage battery positive and negative electrode series connection point interchange module is connected with the storage battery; according to the storage battery charging and discharging device disclosed by the utility model, the storage battery can be subjected to pole reversal, and the storage battery can be charged and discharged before or / and after pole reversal; the utility model also discloses a voltage acquisition and voltage division module. The voltage acquisition and voltage division module is connected with the storage battery charging and discharging device through a voltage division node included in the voltage acquisition and voltage division module. The voltage acquisition and voltage division module can provide a voltage feedback type signal which is used for current stabilization control and comprises storage battery voltage and forward and reverse serial connection state information for charging and discharging operation.

Description

Technical Field

[0001] The utility model relates to a power source, in particular to a battery charging and discharging device. Background Art

[0002] Some batteries, such as lead-acid batteries, can solve some important battery problems, such as softening and / or shedding of active materials, sulfation, passivation, corrosion, etc., by reversing the polarity of the positive and negative electrodes of the battery more than once and then performing charge and discharge operations, thereby significantly improving the battery performance, extending the battery life, and repairing the battery; reversing the polarity of the positive and negative electrodes of the battery more than once and then performing charge and discharge operations means that the polarity of the positive and negative electrodes of the battery is reversed (the positive electrode becomes the negative electrode, and the negative electrode becomes the positive electrode) through charge and discharge, and also means that the battery is charged and discharged before and after the reversal occurs;

[0003] The above-mentioned operations on the storage battery require that the charging and discharging device of the storage battery has charging and discharging functions corresponding to the above-mentioned operations. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a battery charging and discharging device, which can realize the following functions: can charge and discharge the battery, can make the battery with reversed positive and negative poles to reverse polarity through charging and discharging, and can charge and discharge the battery before and / or after the reverse polarity occurs.

[0005] In order to solve the above technical problems, the utility model provides a battery charging and discharging device, which can reverse the positive and negative poles of a battery through charging and discharging, and charge and discharge the battery before and / or after the reversal of the polarity;

[0006] The battery with reversed positive and negative poles includes: lead-acid battery, iron-nickel battery, cadmium-nickel battery, etc.

[0007] The device comprises: a positive and negative series connection type thyristor rectifier module, a battery positive and negative pole series connection point interchange module, and a semi-open and semi-closed trigger type thyristor trigger module; the positive and negative series connection type thyristor rectifier module is connected with the battery positive and negative pole series connection point interchange module and the semi-open and semi-closed trigger type thyristor trigger module, and the battery positive and negative pole series connection point interchange module is connected with the battery; the specific connection structure is as follows:

[0008] The thyristor is a unidirectional thyristor;

[0009] The forward and reverse series connection type thyristor rectifier module, referred to as the forward and reverse connection rectifier module, refers to a thyristor rectifier module that can connect the rectifier circuit and the battery in a forward or reverse series manner in a certain rectification mode (or thyristor conduction mode) during rectification operation without causing a short circuit between the positive and negative electrodes of the battery;

[0010] The rectifier circuit refers to an electrical path that allows electricity flowing out of one port of the power supply to flow through the rectifier module and the load and then flow back to the other port of the power supply;

[0011] The forward series connection means that when the positive and negative electrodes of the battery are connected in series in the rectifier circuit, the rectified direct current flows into the battery from the positive electrode of the battery and flows out of the battery from the negative electrode of the battery; the reverse series connection means that when the positive and negative electrodes of the battery are connected in series in the rectifier circuit, the rectified direct current flows into the battery from the negative electrode of the battery and flows out of the battery from the positive electrode of the battery;

[0012] The battery positive and negative pole serial connection point interchange module, referred to as the contact interchange module, includes two serial input terminals and two serial output terminals; the contact interchange module has a structure that can interchange and reversely connect its two serial input terminals to its two serial output terminals respectively;

[0013] The semi-open and semi-closed trigger type thyristor trigger module, referred to as the semi-open and closed trigger module, means that when the thyristor trigger module triggers the thyristor in the rectifier module, the same trigger signal output terminal only outputs the trigger signal in the positive half-wave cycle or the negative half-wave cycle of the alternating current, and does not output the trigger signal in the negative half-wave cycle or the positive half-wave cycle of the alternating current; especially in full-wave rectification, more than two trigger signal output terminals also present a semi-open and semi-closed or one open and the other closed working characteristic with each other, that is, when one part of the trigger signal output terminals outputs the trigger signal to the outside, the other part of the trigger signal output terminals does not output the trigger signal to the outside (the open represents the output of the trigger signal to the outside, and the closed represents the non-output of the trigger signal to the outside, and the number of the trigger signal output terminals in the two parts can be the same or different);

[0014] The forward and reverse connection rectifier module and the battery are connected to each other through the contact interchange module, and the connection enables the battery to be connected in series in the forward direction or in series in the reverse direction in the rectifier circuit; that is, the forward and reverse connection rectifier module and the contact interchange module are connected through two series connection points in the rectifier circuit, and the two series connection points are not directly connected to each other; the two series connection points in the rectifier circuit are respectively connected to the two series connection input ends of the contact interchange module, and the two series connection output ends of the contact interchange module are respectively connected to the positive and negative electrodes of the battery;

[0015] From above, the positive and negative electrodes of the battery are respectively connected to the two series connection points in the above-mentioned rectifier circuit through the contact interchange module;

[0016] Thus, when the contact point interchange module interchanges and switches its two series-connected input terminals, and connects them to its two series-connected output terminals respectively, the positive and negative electrodes of the battery can be interchanged and switched, and connected to the two series-connected points on the rectifier circuit respectively, thereby realizing the switching of the battery between the forward series connection, the reverse series connection, and the two series connection states in the rectifier circuit;

[0017] The trigger signal output end of the semi-open / closed trigger module is connected to the G pole and K pole of the thyristor in the forward and reverse connection rectifier module, that is, the trigger connection is realized;

[0018] The trigger connection mode of the semi-open and close trigger module and the positive and negative connection rectifier module is an open-loop rectifier trigger connection;

[0019] The open-loop rectification trigger connection means that when the thyristor rectification module is triggered by the trigger connection mode and performs rectification operation, the rectification circuit formed at any time during the rectification operation is open-loop and not end-to-end connected.

[0020] Further, the forward and reverse connection rectifier module includes: a single-phase full-wave fully controlled thyristor rectifier module, a single-phase half-wave half-controlled thyristor rectifier module, a single-phase half-wave fully controlled thyristor rectifier module, a three-phase half-wave half-controlled thyristor rectifier module, a three-phase full-wave fully controlled thyristor rectifier module, or one or more thereof;

[0021] The contact point interchange module includes: a double-pole double-throw type, a thyristor group configuration type, a rotary disk swap type battery positive and negative pole series connection point interchange module, one or more of them;

[0022] The semi-open and closed trigger module includes: a single junction transistor double tube four-terminal isolation full-wave trigger type, a single junction transistor single tube analog / digital conversion four-terminal isolation full-wave trigger type, a single junction transistor single tube two-terminal isolation half-wave trigger type, a single junction transistor single tube single-end direct half-wave trigger type, a resistor-capacitor phase shift half-wave trigger type, a single junction transistor single tube three-terminal isolation half-wave trigger type, and a six-terminal full-wave trigger type semi-open and semi-closed trigger type trigger module based on a single-chip microcomputer, one or more thereof;

[0023] The open-loop rectification trigger connection includes: a cross-contact trigger connection mode of the different-path bridge arms of the thyristor rectifier bridge in the full-wave full-controlled rectification module; the cross-contact of the different-path bridge arms means that the upper and lower bridge arms of the same bridge are not triggered and turned on at the same time, but the upper and lower bridge arms of different bridges are triggered and turned on at the same time.

[0024] Further, the single-phase full-wave fully controlled thyristor rectifier module includes: a single-phase full-bridge rectifier bridge VT1-VT4 formed by four unidirectional thyristors VT1, VT2, VT3, and VT4 connected to each other, wherein VT1 and VT4 are the upper and lower bridge arms of one bridge, respectively, and VT2 and VT3 are the upper and lower bridge arms of another bridge, respectively;

[0025] The single junction transistor two-tube four-terminal isolation full-wave trigger type or single junction transistor single-tube analog / digital conversion four-terminal isolation full-wave trigger type trigger module includes: first, second, third, and fourth trigger signal output terminals; wherein the first and second trigger signal output terminals can simultaneously output trigger signals to the outside during the positive half-wave cycle of the alternating current, but do not output trigger signals to the outside during the negative half-wave cycle of the alternating current; on the contrary, the third and fourth trigger signal output terminals can simultaneously output trigger signals to the outside during the negative half-wave cycle of the alternating current, but do not output trigger signals to the outside during the positive half-wave cycle of the alternating current;

[0026] The cross-contact trigger connection method of the different-path bridge arms of the thyristor rectifier bridge in the full-wave fully-controlled rectifier module includes: triggering and connecting the first and second trigger signal output terminals of the trigger module to the thyristors VT1 and VT3 of the rectifier bridge VT1-VT4 respectively, and triggering and connecting the third and fourth trigger signal output terminals to the thyristors VT2 and VT4 respectively.

[0027] Furthermore, the battery charging and discharging device further includes a current stabilizing module, and / or a current limiting module;

[0028] The current stabilization module includes: a position adjustment signal output terminal; used to output a position adjustment signal, such as a potential or current signal;

[0029] The current limiting module includes: a position adjustment signal output terminal; used to output a position adjustment signal, such as a potential or current signal;

[0030] The semi-open / closed trigger module comprises: a phase control node; the phase of the trigger signal of the thyristor trigger module can be adjusted by changing the potential of the node;

[0031] The current stabilization module position adjustment signal output terminal and the current limiting module position adjustment signal output terminal are connected to the phase control node of the semi-open / close trigger module;

[0032] The current stabilization module and the current limiting module can output a phase control signal to the phase control node of the semi-open / closed trigger module through the position adjustment signal output terminal during the rectification process, so as to adjust and control the trigger signal phase and the conduction angle of the thyristor trigger module, thereby achieving a stable and constant rectified current and limiting the change of the rectified current when the voltage and current change in the rectifier circuit (for example, when the battery voltage changes, when the battery is connected in series in positive and negative directions, and when the input AC voltage is unstable);

[0033] The current stabilization module comprises: a preset voltage signal type current stabilization module; wherein the voltage signal refers to a signal related to the battery voltage and the voltage reflecting the positive and negative series connection state of the battery in the rectifier circuit; and when the positive and negative voltages of the battery are positive voltage, 0V, and negative voltage, the preset voltage signal type current stabilization module can still output a non-zero position adjustment signal to the trigger module; the non-zero position adjustment signal refers to a non-zero electrical signal or physical signal;

[0034] The current limiting module comprises: a current signal feedback type current limiting module; wherein the current signal refers to a signal related to the current in the rectifier circuit;

[0035] The preset voltage signal type current stabilizing module and the current signal feedback type current limiting module refer to that when the current stabilizing module or the current limiting module regulates the working state of the thyristor rectifier module and the rectifier circuit by regulating the phase of the trigger signal of the thyristor trigger module and the thyristor conduction angle, the working state of the rectifier circuit is regulated according to the following causal logic: the current stabilizing module or the current limiting module first transmits the signal related to the voltage, voltage change or current, current change in the rectifier circuit to the thyristor trigger module, thereby causing the trigger signal of the thyristor trigger module to be regulated, and then the regulated trigger signal is transmitted to the thyristor rectifier module, thereby causing the working state of the thyristor rectifier module and the rectifier circuit to be regulated;

[0036] The preset voltage signal type current stabilization module or the current signal feedback type current limiting module includes a voltage signal or current signal acquisition end, and the rectifier circuit includes a voltage acquisition node or a current acquisition node, and the voltage signal or current signal acquisition end is connected or coupled to the voltage acquisition node or the current acquisition node.

[0037] Furthermore, the preset voltage signal type current stabilization module has multiple classification types, including: full-wave or half-wave current stabilization type, isolated or non-isolated type, collecting series mixed voltage or battery voltage or thyristor voltage type, amplifying or non-amplifying the voltage division change rate, based on analog circuit or single chip computer type, number of submodule boards;

[0038] Further, the preset voltage signal type current stabilizing module includes: full-wave isolation mixed pressure change rate amplification analog double-plate type, full-wave isolation mixed pressure change rate amplification analog single-plate type, full-wave isolation mixed pressure change rate non-amplification analog double-plate type, half-wave non-isolated tube pressure change rate amplification analog single-plate type preset voltage signal type current stabilizing module, one or more thereof;

[0039] Alternatively, the preset voltage signal type current stabilization module comprises: a current stabilization module realized by replacing the series mixed voltage or thyristor voltage collected by the voltage collection end of the above-mentioned current stabilization module with the battery voltage;

[0040] The current signal feedback type current limiting module includes: a current signal feedback type current limiting module based on a current transformer.

[0041] Furthermore, the current stabilization module includes a voltage collection and voltage division module; the voltage collection and voltage division module includes: a voltage division output terminal;

[0042] The current limiting module includes: a current signal feedback module; the current signal feedback module includes: a feedback signal voltage output terminal;

[0043] The voltage-dividing output terminal of the current stabilizing module is connected to the feedback signal voltage output terminal of the current limiting module, so that the current stabilizing module and the current limiting module are integrated and connected with each other;

[0044] In this way, the maximum value of the rectified current is limited by using a partial circuit of the shared current stabilization module.

[0045] Furthermore, the battery charging and discharging device also includes: a switch, a controller, and a charging and discharging channel;

[0046] The controller includes: a time controller, a temperature controller, a voltage controller, a current controller, a power controller, etc., one or more thereof; or a controller based on a single chip microcomputer, a PLC (programmable logic controller), one or more thereof;

[0047] The switch is arranged between the AC power output terminal and the AC power input terminal of the charging and discharging device to control the power supply of the charging and discharging device, or is arranged in the internal structure of the charging and discharging device;

[0048] The charging and discharging channel is the above-mentioned battery charging and discharging device of the utility model; the charging and discharging channel includes a contact interchange module;

[0049] The control signal output terminal of the controller is connected to the control signal input terminal of the switch and the contact interchange module, and controls the switch and the contact interchange module by sending control signals;

[0050] One controller controls two or more switches, contact interchange modules, or controls two or more charge and discharge channels at the same time; or one switch, one contact interchange module, one charge and discharge channel is controlled by two or more controllers at the same time;

[0051] Or / and, the battery charging and discharging device further comprises: an adjustable resistor in the charging and discharging channel, an operation panel, and a DC overcurrent and overvoltage protection device;

[0052] The adjustable resistors include: phase-shift adjustable resistors, collector adjustable resistors, emitter adjustable resistors, voltage sampling and voltage division adjustable resistors, and voltage-feed output adjustable resistors (resistors related to current signal feedback voltage regulation in the current limiting module);

[0053] The operation panel is arranged on the outer surface of the battery charging and discharging device, and one or more of the controller and the adjustable resistor of the charging and discharging channel are arranged on the operation panel;

[0054] The DC overcurrent and overvoltage protection device includes: a fuse, a circuit breaker, or one or more thereof;

[0055] The DC over-current and over-voltage protection device is arranged in a DC circuit in a rectifier circuit.

[0056] Furthermore, the DC overcurrent and overvoltage protection device is arranged between the contact interchange module and the battery electrodes.

[0057] The utility model also provides a voltage collection and voltage division module for a battery charging and discharging device, the module comprising: first and second voltage collection ports, first, second and third resistors;

[0058] The first voltage acquisition port is connected to the positive electrode or negative electrode of the battery through a first resistor, and the negative electrode or positive electrode of the battery is connected to the second voltage acquisition port through a second resistor and a third resistor in sequence;

[0059] A voltage dividing node is provided between the second resistor and the third resistor;

[0060] The resistance values ​​of the first and second resistors are: ≥0Ω;

[0061] During operation, the first and second voltage acquisition ports are respectively connected to the voltage acquisition nodes on the circuit to obtain the voltage between the two ports. The voltage is mixed and superimposed in series with the battery voltage with or without voltage reduction to form a mixed voltage. The mixed voltage generates a divided voltage at the voltage division node. The divided voltage and the voltage division change of the voltage division node can reflect the voltage between the voltage acquisition nodes, the positive and negative voltages of the battery and their changes to a certain extent.

[0062] Furthermore, the voltage collection and voltage division module for the battery charging and discharging device also includes a battery positive and negative pole serial connection point interchange module; the battery positive and negative pole serial connection point interchange module includes: 2 serial input terminals and 2 serial output terminals;

[0063] The connection mode of the battery positive and negative pole serial connection point interchange module in the voltage collection and voltage division module is as follows: the first voltage collection port is connected to the positive or negative pole of the battery through the first resistor, an input end of the battery positive and negative pole serial connection point interchange module, and an output end of the battery positive and negative pole serial connection point interchange module in sequence;

[0064] The negative electrode or the positive electrode of the battery is connected to the second voltage collection port in sequence through another output end of the battery positive and negative electrode series connection point interchange module, another input end of the battery positive and negative electrode series connection point interchange module, a second resistor, and a third resistor;

[0065] In this way, the positive or negative pole, or the negative or positive pole of the battery is connected to the first resistor and the second resistor respectively through the battery positive and negative pole series connection point interchange module;

[0066] The contact interchange module can interchange the positive and negative poles of the battery and connect them to the first resistor and the second resistor in reverse.

[0067] Or / and, the first and second voltage acquisition ports are respectively connected to the bridge head node and the bridge tail node of the thyristor rectifier bridge in the rectifier circuit;

[0068] Or / and, the voltage division node is connected to the feedback signal voltage output terminal of the current limiting module; thereby sharing a certain external circuit with the current limiting module;

[0069] Or / and, the resistor is an adjustable resistor;

[0070] Or / and, a rectifier diode is arranged between the first voltage collection port, the second voltage collection port and the external circuit voltage collection point.

[0071] Beneficial Effects

[0072] 1. The battery charging and discharging device of the utility model can reverse the polarity of a battery whose positive and negative poles can be reversed by charging and discharging, and can charge and discharge the battery before and / or after the polarity reversal;

[0073] Specifically, the battery is reversely connected in series in the rectifier circuit through the battery positive and negative pole series point interchange module, and the rectified direct current in the rectifier circuit flows into the battery from the negative pole of the battery (set as electrode B) and flows out of the battery from the positive pole of the battery (set as electrode A), which is equivalent to discharging the battery. If the discharge depth is deep enough, the voltage between the positive and negative poles of the battery will undergo the following process: the voltage between electrodes A and B first decreases and may decrease to 0V, and then the voltage changes from 0V to a negative voltage value, and finally electrode A is reversed to become a negative pole and electrode B is reversed to become a positive pole (during this deep discharge process, the rectified direct current is always kept flowing into the battery from electrode B and flowing out of the battery from electrode A); in fact, when the deep discharge causes the voltage between electrodes A and B to decrease to 0V and begins to change from 0V to a negative voltage value, the operation of the rectified direct current flowing into the battery from electrode B and flowing out of the battery from electrode A is equivalent to starting to charge the battery, because at this time electrodes A and B have been reversed;

[0074] 2. The battery charging and discharging device of the utility model includes a thyristor rectifier module capable of positive and negative series connection, a battery positive and negative pole series connection point interchange module, a semi-open and semi-closed trigger thyristor trigger module and its connection structure (including an open-loop rectifier trigger connection), which ensures the realization of the functions described in the above beneficial effect 1, so that the battery can switch between forward series connection and reverse series connection in the rectifier circuit, and will not cause a battery short circuit problem during the state switching;

[0075] Furthermore, the battery charging and discharging device of the utility model solves important battery problems by performing positive and negative polarity reversal and subsequent charging and discharging operations on the battery through pulsating direct current generated by rectification by a thyristor rectifier module, making the solution more effective and more efficient.

[0076] 3. The preset voltage signal type current stabilizing module of the battery charging and discharging device of the utility model can play a good stabilizing and constant role on the rectified current when the battery is connected in forward series, reverse series, reverse polarity, or before and / or after polarity reversal according to the battery voltage, the voltage reflecting the forward and reverse series connection state of the battery in the rectifier circuit and their changes.

[0077] 4. The current feedback type current limiting module of the battery charging and discharging device of the utility model can limit the upper limit of the rectifier current during the rectification process, which can not only provide protection for the safety of the rectification work, but also cooperate with the current stabilization circuit to obtain a more stable or constant current; for example: when the battery is switched between forward series connection and reverse series connection, it will cause a sudden change in voltage in the rectifier circuit, and thus the current will also mutate or will mutate subsequently under the influence of the voltage mutation. The current limiting module based on the current transformer does not react to the current that suddenly decreases at this time due to the deficiency of its current feedback mode, and has a certain lag in adjusting and limiting the reaction to the sudden increase in current, which leads to invalid constant current or overcurrent accidents; and the preset voltage signal type current stabilization module, although it can be used when the voltage of the rectifier circuit suddenly changes, This change reacts faster so that the current can be adjusted simultaneously or in a timely manner. However, the changes in the internal resistance of the battery and the differences in the internal resistance between different batteries, and the voltage changes of the rectifier module and the current changes caused by the voltage changes are usually not an absolute linear relationship. These problems may make the steady current and constant current effects of the current stabilization module less stable, reliable, and easy to adjust. Combining and complementing the effects of the current stabilization module and the current limiting module can achieve a certain steady current and constant current effect of taking advantage of each other's strengths and making up for each other's weaknesses. Furthermore, the following combination of the effects of the current stabilization module and the current limiting module can be achieved: regardless of whether the voltage of the rectifier circuit changes suddenly or changes, the rectified current regulated by the current stabilization module during the rectification process is always greater than the current limit value set by the current limiting module. This combination can achieve a higher quality, more stable and reliable steady current and constant current effect.

[0078] 5. The voltage acquisition and voltage division module for the battery charging and discharging device of the utility model, and the connection method with the rectifier circuit, can output a voltage division signal of a series mixed voltage to the outside. The mixed voltage contains information related to the AC voltage, the battery voltage, and the positive and reverse series connection status of the battery, thereby providing a comprehensive and reliable rectifier circuit voltage feedback signal for steady current control for the battery charging and discharging device to implement the charging and discharging operations of the positive and negative poles and the reverse poles and before and after the reverse poles; in addition, by adjusting the resistance value of the voltage acquisition and voltage division resistor, the forward voltage drop required for the conduction of the thyristor on the upper arm of the thyristor full bridge can be provided, so that the potential and current of the transistor control electrode (such as the base of the triode or the light-emitting diode of the optocoupler) can be controlled within the limit voltage and current of the components.

[0079] 6. The DC overcurrent and overvoltage protection device for the battery charging and discharging device of the utility model can automatically disconnect the rectifier circuit when the rectifier circuit has overcurrent and overvoltage, thereby ensuring the safety of people, charging and discharging devices, batteries, and the environment; especially when the battery is switched between forward series connection and reverse series connection, the voltage and current in the rectifier circuit may increase, causing the rectifier bridge to be broken down, resulting in a closed loop in the rectifier circuit and causing a battery short circuit, and the DC overcurrent and overvoltage protection device has a good cut-off protection effect on such battery short circuit risks; further, arranging the DC overcurrent and overvoltage protection device between the contact interchange module and the battery electrodes is conducive to disconnecting the battery short circuit loop with the greatest reliability when a problem occurs; at the same time, this also facilitates the operation of the protection device, such as setting, checking, and restoring, because the protection device is directly connected to the battery electrodes and is relatively close to the battery electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 It is a schematic diagram of the structure and connection of a single-phase full-wave full-controlled rectifier module capable of positive and negative connection and a double-pole double-throw contact interchangeable module of a battery charging and discharging device in Embodiment 1 of the utility model.

[0081] Figure 2 It is a schematic diagram of the structure and connection of a double-tube four-terminal isolated semi-open / closed trigger module of a battery charging and discharging device in Example 1 of the utility model.

[0082] Figure 3 It is a schematic diagram of the structure and connection of a current stabilizing module of a battery charging and discharging device in Example 1 of the utility model.

[0083] Figure 4 It is a schematic diagram of the structure and connection of a current limiting module of a battery charging and discharging device in Example 1 of the utility model.

[0084] Figure 5 It is a schematic diagram of the structure and connection of a contact interchange module of a thyristor group configuration of a battery charging and discharging device in another implementation manner of Example 1 of the utility model.

[0085] Figure 6 It is a schematic diagram of the structure and connection of another implementation scheme of Example 1 of the utility model, a rotary disk-switchable contact interchange module of a battery charging and discharging device.

[0086] Figure 7 This is a schematic diagram of the structure and connection of a single-tube analog / digital conversion four-terminal isolated semi-open / closed trigger module of another implementation mode 2 of Example 1 of the utility model.

[0087] Figure 8 It is a schematic diagram of the structure and connection of a single-phase half-wave fully controlled rectifier module capable of positive and negative connection, a double-pole double-throw contact interchange module, a single-tube single-end direct semi-open and close trigger module, and a current stabilization module of a battery charging and discharging device in Embodiment 2 of the utility model.

[0088] Fig. 9 This is a schematic diagram of the structure and connection of another implementation manner of Example 2 of the utility model, a RC phase-shifted semi-open / closed trigger module of a battery charging and discharging device.

[0089] Fig.10 It is a schematic diagram of the structure and connection of a three-phase half-wave half-controlled rectifier module capable of positive and negative connection and a single-tube three-terminal isolated semi-open and closed trigger module of a battery charging and discharging device in Example 3 of the utility model.

[0090] Fig.11 It is a schematic diagram of the connection structure of the switch, controller, charging and discharging channel, and transformer of the battery charging and discharging device in Example 4 of the utility model. DETAILED DESCRIPTION

[0091] The technical content, features and effects of the present invention are further described in detail below in conjunction with specific embodiments.

[0092] Example 1

[0093] The lead-acid battery charging and discharging device of this embodiment includes: a positive and negative series-connected thyristor rectifier module, a battery positive and negative pole series connection point interchange module, a semi-open and semi-closed trigger thyristor trigger module, a current stabilization module, and a current limiting module;

[0094] The thyristor in this embodiment is a (3CT) KP type unidirectional thyristor;

[0095] like Figure 1As shown, the thyristor rectifier module capable of positive and negative series connection in this embodiment is a full-wave fully controlled thyristor rectifier module 101, comprising four unidirectional thyristors VT1, VT2, VT3, and VT4 of the same type connected to each other to form a single-phase full-bridge rectifier bridge (VT1-VT4), wherein VT1 and VT4 are the upper and lower bridge arms of one bridge, respectively, and VT2 and VT3 are the upper and lower bridge arms of another bridge, respectively; the AC input end of the full-bridge rectifier bridge (VT1-VT4) is respectively connected to the two output ends ac1 and ac2 of the single-phase AC power Ua (3-240V), and the two upper bridge arm connection points (bridge heads) and the two lower bridge arm connection points (bridge tails) of the full-bridge rectifier bridge (VT1-VT4) are respectively connected to the series connection points J1 and J2 in the rectifier circuit, and the two series connection points are not directly connected to each other. When the rectifier is working, the DC power flows from the node J1 to the node J2;

[0096] like Figure 1 As shown, the battery positive and negative pole serial connection point interchange module of this embodiment is a double-pole double-throw type battery positive and negative pole serial connection point interchange module 102, including a double-pole double-throw DC contactor RL1-DPDT, and the internal switch S1 of the contactor RL1-DPDT includes moving pieces p1, p2 and static pieces p3, p4, p5, p6; wherein the moving pieces p1, p2 are respectively connected to the rectifier circuit through the serial connection points J1, J2 (that is, p1 is connected to the bridge head of the rectifier module 101, and p2 is connected to the bridge tail of the rectifier module 101), the static pieces p3, p6 are simultaneously connected to the positive pole of the battery through the node J3, and the static pieces p4, p5 are simultaneously connected to the negative pole of the battery through the node J4; thus, the positive pole and the negative pole of the battery are respectively connected to the above-mentioned two serial connection points J1, J2 through the battery positive and negative pole serial connection point interchange module 102, and are thus connected to the rectifier module 101;

[0097] The above-mentioned serial connection points J1 and J2 are also equivalent to the two serial connection input terminals of the contact exchange module 102, and J3 and J4 are also equivalent to the two serial connection output terminals of the contact exchange module 102;

[0098] The on and off of the internal switch S1 of the contactor RL1-DPDT (the connection status of each moving piece and the static piece) is controlled by the operation of the electromagnet, and the operation of the electromagnet is controlled by the electromagnet control signal. The electromagnet control signal is input from nodes J5 and J6. The control signal of the electromagnet is the power supplied to the electromagnet.

[0099] The battery BT is a single battery or a battery pack formed by connecting two or more single batteries in series. The absolute value of the voltage between the positive and negative electrodes of the battery BT is 0 to 204V. The absolute value of the voltage between the positive and negative electrodes of the battery in this embodiment is less than the voltage value of the AC power supply Ua in this embodiment.

[0100] Depend on Figure 1It can be seen that when the moving pieces p1 and p2 of the contactor RL1-DPDT are connected to the static pieces p3 and p5 respectively at the same time, the nodes J1 and J3 are connected, and J2 and J4 are connected. At this time, the battery is in a forward series connection state in the rectifier circuit; when the moving pieces p1 and p2 are connected to the static pieces p4 and p6 respectively at the same time, the nodes J1 and J4 are connected, and J2 and J3 are connected. At this time, the battery is in a reverse series connection state in the rectifier circuit;

[0101] As described above, the double-pole double-throw battery positive and negative pole serial connection point interchange module 102 of this embodiment can interchange and reversely connect the positive and negative poles of the battery BT to the two serial connection points J1 and J2, thereby realizing the forward serial connection, reverse serial connection and switching between the two serial connection states of the battery BT in the rectifier circuit;

[0102] like Figure 2 As shown, the half-open and half-closed triggered thyristor trigger module of this embodiment is a single junction transistor double tube four-terminal isolation full-wave triggered half-open and half-closed triggered thyristor trigger module 103, including a single junction transistor positive half-wave synchronous isolation trigger module 103-1 and a single junction transistor negative half-wave synchronous isolation trigger module 103-2. The internal structures of the two synchronous isolation trigger modules are the same. The synchronous isolation trigger module 103-1 is taken as an example for description below;

[0103] The single junction transistor positive half-wave synchronous isolation trigger module 103-1 of this embodiment includes: rectifier diodes VD1, VD2, VD3, resistors R1, R2, voltage regulator diodes VDz1, VDz2, phase-shift adjustable resistors Rp1, Rp2, single junction transistor VT5, capacitor C1, pulse transformer T1;

[0104] Among them, the rectifier diode VD1, the resistor R1, the voltage regulator diodes VDz1, VDz2, and VD2 are connected in series in sequence to form a rectifier, buck, and voltage regulator circuit. The positive electrode of the rectifier diode VD1 and the negative electrode of VD2 at both ends of the series circuit are respectively connected to the two electrical output nodes ac3 and ac4 of the single-phase AC power supply Ua-1, that is, the single-phase AC power Ua-1 enters the series circuit from ac3 and flows out from ac4 after being rectified, bucked, and stabilized; the single-phase AC power supply Ua-1 and the embodiment are The single-phase AC power Ua supplied by the rectifier circuit is synchronous, and Ua-1 can be Ua (i.e., ac1=ac3, ac2=ac4), or Ua-1 can be a synchronous AC power supply obtained by transforming Ua through a transformer; in the rectifier-step-down and voltage-stabilizing circuit, R1 and VDz1 are connected to each other, and a node J7 is provided on the circuit. After rectification, step-down and voltage stabilization, Ua-1 is provided from the node J7 to the oscillation circuit composed of the single junction transistor VT5, the adjustable resistors Rp1, Rp2, the capacitor C1 and the resistor R2. Synchronous power supply; in the oscillation circuit, Rp2, Rp1, and C1 are connected in series in sequence, and Rp2 and C1 at both ends of the series circuit are respectively connected to nodes J7 and J9 (J9 is a node on the line connecting VD2 and VDz2), the E pole of the single junction transistor VT5 is connected to node J8 (J8 is a node on the line connecting Rp1 and C1), the B1 pole is connected to node J9 through the rectifier diode VD3 and the primary coil of the pulse transformer T1 in sequence, and the B2 pole is connected to node J7 through the compensation resistor R2; a secondary coil of the pulse transformer T1 (i.e., a trigger signal output end) is connected to G1 and K1 of the thyristor VT1 in the rectifier module 101, and another secondary coil (i.e., another trigger signal output end) is connected to G3 and K3 of the thyristor VT3 in the rectifier module 101. When the triggering operation is in progress, the trigger module 103-1 can output pulse trigger signals to the thyristors VT1 and VT3 simultaneously and synchronously through the two secondary coils of the pulse transformer T1;

[0105] The connecting line between the adjustable resistors Rp1 and Rp2 is provided with a phase control node J10, and the node J10 can be used to connect to the current stabilization circuit;

[0106] The single junction transistor negative half-wave synchronous isolation trigger module 103-2 has the same internal structure as 103-1, but the external components or nodes connected to the corresponding components or nodes in the corresponding structures of the two are different. The difference is that: 1) the positive electrode of the rectifier diode VD4 in the rectifier step-down voltage stabilization circuit of 103-2 is connected to ac4, and the negative electrode of VD5 is connected to ac3, that is, the alternating current enters the circuit from ac4 and flows out from ac3 after rectification, step-down and voltage stabilization; 2) a secondary coil ( That is, one trigger signal output end) is connected to G2 and K2 of thyristor VT2 in the rectifier module 101, and the other secondary coil (that is, another trigger signal output end) is connected to G4 and K4 of thyristor VT4. The trigger module 103-2 simultaneously triggers thyristors VT2 and VT4 through the pulse transformer T2; 3) The phase control nodes J14 and J10 are connected to different current stabilization circuit nodes (see the subsequent related details), and the phase control node J14 is a node set on the line connecting the adjustable resistors Rp3 and Rp4.

[0107] When the single-junction transistor dual-tube four-terminal isolated full-wave triggered thyristor trigger module 103 of this embodiment is working, when the alternating current Ua is in its positive half-wave cycle (positive and negative half-wave cycles can be defined artificially), its trigger module 103-1 sends a trigger signal to the rectifier module 101, so that the thyristors VT1 and VT3 are turned on, and its trigger module 103-2 does not send a trigger signal to the rectifier module 101, and the thyristors VT2 and VT4 are not turned on; when the alternating current Ua is in its negative half-wave cycle, its trigger module 103-1 does not send a trigger signal to the rectifier module 101, and the thyristors VT1 and VT3 are not turned on, and its trigger module 103-2 sends a trigger signal to the rectifier module 101, so that VT2 and VT4 are turned on;

[0108] In this way, the rectifier circuit formed at any time during the rectification operation is an open-loop, non-end-to-end conductive path, so that the positive and negative electrodes of the battery connected in series in reverse in the rectifier circuit will not be short-circuited due to the formation and conduction of the rectifier circuit, so that the battery can be connected in series in the forward direction or in the reverse direction in the rectifier circuit when the thyristor rectifier module 101 of this embodiment is rectifying;

[0109] The above-mentioned open-loop rectifier trigger connection can make the upper and lower bridge arms on different paths in the full-wave full-controlled rectifier module 101 simultaneously conductive, thereby realizing the rectification path and rectification work, and thus belongs to the trigger connection mode of cross-contact of different path bridge arms;

[0110] The current stabilization module of this embodiment is as follows Figure 3As shown, it is a preset voltage signal type current stabilization module, and the current stabilization module is a full-wave isolation mixed pressure change rate amplification analog double-plate current stabilization module 104, including a positive half-wave isolation mixed pressure change rate amplification analog double-plate current stabilization module 104-1 and a negative half-wave isolation mixed pressure change rate amplification analog double-plate current stabilization module 104-2. The internal structures of the two current stabilization modules are the same, and the current stabilization module 104-1 is taken as an example for explanation below;

[0111] The positive half-wave isolation mixed voltage change rate amplification analog dual-plate current stabilization module 104-1 of this embodiment includes a potential control module 104-1A, a signal amplification and adjustment module 104-1B, and a mixed voltage collection and voltage division module 104-1C;

[0112] Among them, the potential control module 104-1A includes: a photoelectric coupler (optical coupler) U1, an adjustable resistor Rp5, the collector p7 (also the output end of the adjustment signal) of the photosensitive transistor of the optical coupler U1 is connected to the phase control node J10 of the trigger module 103-1, and the emitter p8 of the photosensitive transistor of the optical coupler U1 is connected to the node J9 (also the output end of the adjustment signal) of the trigger module 103-1 through the adjustable resistor Rp5 and thus connected to ac4; the positive and negative electrodes of the light-emitting diode of the optical coupler U1 are p9 and p10 respectively;

[0113] The collector p7 and the node J9 of the photosensitive transistor of the optocoupler U1 are also the output terminals of the potential regulating signal of the potential regulating module 104 - 1A.

[0114] The signal amplification and adjustment module 104-1B includes rectifier diodes VD7, VD8, resistor R5, voltage regulator diodes VDz5, VDz6, collector adjustable resistor Rp6, emitter adjustable resistor Rp7, and NPN transistor VT7; wherein, the rectifier diode VD7, resistor R5, voltage regulator diodes VDz5, VDz6, and rectifier diode VD8 are sequentially connected in series to form a rectifier step-down voltage regulator circuit, and the positive electrode of VD7 is connected to ac3, and the negative electrode of VD8 is connected to ac4, that is, a single Phase alternating current Ua-1 enters the circuit from ac3 and flows out from ac4 after being rectified, stepped down and stabilized; R5 and VDz5 are connected to each other on a line with a node J15, and VDz6 and VD8 are connected to each other on a line with a node J16; the collector c of NPN transistor VT7 is connected to node J15 through adjustable resistor Rp6, the emitter e of VT7 is connected to the positive electrode p9 of the light-emitting diode of the optical coupler U1 through adjustable resistor Rp7, and the negative electrode p10 of the light-emitting diode of the optical coupler U1 is connected to J16;

[0115] The hybrid voltage acquisition and voltage division module 104-1C includes rectifier diodes VD9, VD10, and voltage acquisition and voltage division adjustable resistors Rp8, Rp9, and Rp10; wherein ac3 is connected to one end of the adjustable resistor Rp8 (i.e., voltage acquisition port 1) through the rectifier diode VD9, and the other end of Rp8 is connected to the rectifier circuit series connection point J1 of the rectifier module 101 (i.e., an input end of the contact interchange module 102); one end of Rp10 is connected to the rectifier circuit series connection point J2 of the rectifier module 101 (i.e., an input end of the contact interchange module 102) through Rp9. 102), and the other end of Rp10 (i.e., voltage acquisition port 2) is connected to ac4 through VD10. In this way, after the single-phase AC power Ua-1 enters the circuit from ac3, it is rectified, reduced in voltage, (via the contact interchange module 102) connected in series with the battery voltage to mix and superimpose (form a mixed voltage), reduced in voltage, rectified, and then flows out from ac4; a voltage dividing node J17 is provided on the line connecting Rp9 and Rp10, and the voltage dividing node J17 is connected to the base b of the transistor VT7 in the signal amplification and allocation module 104-1B;

[0116] The voltage division node J17 and the end of the adjustable resistor Rp10 connected to the positive electrode of VD10 (or the node J21) are also the voltage division output ends of the mixed voltage collection and voltage division module 104-1C;

[0117] The end of the adjustable resistor Rp8 connected to the negative electrode of VD9 and the end of the adjustable resistor Rp10 connected to the positive electrode of VD10 are equivalent to the two voltage collection ports of the hybrid voltage collection and voltage division module 104-1C or the current stabilization module 104, which are connected to the voltage collection points ac3 and ac4 through the rectifier diodes VD9 and VD10 respectively;

[0118] When working, the mixed voltage acquisition and voltage division module 104-1C of this embodiment combines the positive half-wave DC voltage after rectification and stepping down of the single-phase AC voltage Ua-1 (the voltage between ac3 and ac4) with the battery voltage to form a mixed voltage Ua-1. mix , and the mixed voltage V mix or its changes to divide the voltage output, that is, the potential at the voltage dividing node J17 (V J17 ) is output to the base b of transistor VT7 in the signal amplification and adjustment module 104-1B, so that a base potential Vb (=V J17 ), and the size or change of Vb affects the collector current Ic or penetration current Ice of transistor VT7, and thus the light emitting diode current of optocoupler U1 in potential control module 104-1A, the phototransistor current, and the potential (V J10 ) has an influence or control effect, for example: when the battery voltage and thus the mixed voltage U mixWhen it increases, Vb increases, Ic or Ice is generated or increased, the light-emitting diode current of U1 is generated or increased, the phototransistor current of U1 is generated or increased, and the potential V on node J10 is increased. J10 is pulled low; otherwise, the opposite happens until Vb is low enough, the potential V on node J10 J10 Not affected or controlled by changes in Vb;

[0119] In addition, the resistance change of Rp1, Rp2, and Rp5 also affects the potential V on the node J10. J10 It has a certain influence and control effect.

[0120] As can be seen from the above, in the current stabilization module 104-1 of this embodiment, the mixed voltage collection and voltage division module 104-1C has the functions of collecting, reducing, mixing, dividing and outputting the voltage (single-phase AC voltage Ua-1, battery BT voltage);

[0121] The signal amplification and adjustment module 104-1B can amplify the voltage division signal or the voltage division signal change amplitude by multiples through the amplification effect of its transistor VT7, so as to enhance the intensity and sensitivity of the battery voltage signal or the mixed voltage signal or the related signal change amplitude transmitted to the optocoupler U1; the change amplitude of the voltage division signal is amplified, and the change of its amplification factor will cause the current stabilization module 104-1 to adjust the phase control node potential, V J10 , when the adjustment rate or adjustment sensitivity changes, for example, under the same voltage division signal change amplitude, the voltage division signal change amplitude is amplified, and those current stabilizing modules 104-1 with larger amplification factors, compared with those current stabilizing modules 104-1 with smaller amplification factors, the former causes the light-emitting diode photocurrent and phototransistor current of the optocoupler U1 to change more greatly, thus causing V J10 The change range of is also larger, which is reflected as follows: the current stabilization module 104-1 adjusts the potential V in two cases with different amplification factors. J10 The adjustment rate or adjustment sensitivity of the change is different; when the amplification factor of the current stabilization module 104-1 changes, the adjustment potential V J10 The rate of regulation or sensitivity of regulation also changes;

[0122] The potential control module 104-1A can adjust and control the node potential V through its adjustment signal output terminal, that is, the collector p7 of the photosensitive transistor of the optocoupler U1 and the node J9. J10 The rise and fall of the trigger module 103-1 is used to adjust and control the phase and output of the trigger signal;

[0123] The above shows that when the preset voltage signal type current stabilizing module 104-1 of this embodiment regulates the working state of the thyristor rectifier module 101 by regulating the thyristor trigger module 103-1, the working state of the rectifier module or the rectifier circuit is regulated according to the following causal logic: the current stabilizing module 104-1 first transmits the signal or signal change related to the battery voltage or the mixed voltage to the thyristor trigger module 103-1, resulting in the trigger signal of the thyristor trigger module 103-1 being regulated, and then, the regulated trigger signal or signal change is transmitted to the thyristor rectifier module 101, thereby resulting in the working or conduction state of the thyristor rectifier module 101 being regulated, so that the rectifier current is regulated to achieve a stabilizing effect; that is, the battery voltage or mixed voltage related signal or signal change, the rectifier current is regulated and stabilized, the former is the antecedent, and the latter is the consequence, and the antecedent has a certain predeterministic feature for the consequence;

[0124] In this embodiment, the voltage signal type current stabilization module 104 in the mixed voltage collection and voltage division module 104-1C has a voltage division node J17 that outputs a voltage division (V J17 ), and 104-1A. The adjustment signal output by the adjustment signal output terminal U1 p7 includes the battery voltage information and the information of the forward and reverse series connection state of the battery in the rectifier circuit (when other conditions are the same, the V J17 (Forward series connection) is different from the V J17 (negative series connection), that is, V J17 (Forward cascade connection) <V J17 (negative series connection)); and when the positive and negative voltages of the battery are positive voltage, 0V, or negative voltage, the preset voltage signal type current stabilization module 104 can still output a non-zero adjustment signal to the trigger module; the non-zero adjustment signal refers to a non-zero electrical signal or physical signal.

[0125] The preset voltage signal type current stabilization module 104-1 of this embodiment has a current stabilization and constant current function on the current of the rectifier circuit when the battery voltage or mixed voltage suddenly changes (for example, when the battery and the rectifier circuit are switched between forward series connection and reverse series connection), thereby preventing the sudden change of current value from causing circuit failure.

[0126] Compared with 104-1, the negative half-wave isolation mixed voltage change rate amplification analog dual-plate current stabilization module 104-2 of this embodiment has the same internal structure, but the external components or nodes connected to the corresponding components or nodes in the corresponding structures of the two are different. The difference is that: 1) the collector p11 of the photosensitive transistor of the optocoupler U2 of 104-2 is connected to the phase control node J14 of the trigger module 103-2, and the emitter p12 of the photosensitive transistor of the optocoupler U2 is connected to the trigger module 103-2 through the adjustable resistor Rp11. 3-2 is connected; 2) the positive electrode of the rectifier diode VD11 in the rectifier-step-down and voltage-stabilizing circuit is connected to ac4, and the negative electrode of VD12 is connected to ac3, that is, the alternating current enters the circuit from ac4 and flows out from ac3 after rectification, step-down and voltage stabilization; 3) the positive electrode of VD13 in the mixed voltage acquisition and voltage division module 104-2C is connected to ac4, and the negative electrode of VD14 is connected to ac3, that is, the alternating current enters the circuit from ac4 and flows out from ac3 after rectification, step-down, mixed voltage and step-down.

[0127] The full-wave isolation mixed voltage change rate amplification analog double-plate current stabilization module 104 of this embodiment, when the AC power Ua is in its positive half-wave cycle, its current stabilization module 104-1 regulates the working or conduction state of the thyristor rectifier circuits VT1 and VT3 by regulating the trigger signal of the thyristor trigger circuit 103-1; when the AC power Ua is in its negative half-wave cycle, its current stabilization module 104-2 regulates the working or conduction state of the thyristor rectifier circuits VT2 and VT4 by regulating the trigger signal of the thyristor trigger circuit 103-2;

[0128] The lead-acid battery charging and discharging device of this embodiment can cause the lead-acid battery to reverse polarity by charging and discharging, and can charge and discharge the battery before and / or after the reverse polarity;

[0129] During operation, when the lead-acid battery BT is connected in series with the rectifier circuit of the present embodiment in the forward direction, that is, the rectified direct current enters the battery from the positive electrode of the lead-acid battery BT and flows out of the battery from the negative electrode, the rectifier circuit charges the lead-acid battery BT; when the lead-acid battery BT is connected in series with the rectifier circuit of the present embodiment in the reverse direction, the rectified direct current enters the battery from the negative electrode of the lead-acid battery BT and flows out of the battery from the positive electrode, the rectifier circuit discharges the lead-acid battery BT; the rectifier circuit over-discharges the lead-acid battery BT, so that the positive and negative electrodes of the lead-acid battery BT are reversed, that is, the rectifier circuit discharges the lead-acid battery BT, so that the rectified direct current enters the battery from the negative electrode (electrode B) of the lead-acid battery BT and flows out of the battery from the positive electrode (electrode A), so that the positive and negative electrodes of the lead-acid battery BT are reversed. The positive value or absolute value of the voltage between the negative electrodes decreases until it decreases to 0V. At this time, the connection between the rectifier circuit and the lead-acid battery BT is kept unchanged, and the rectified DC current continues to enter the battery BT from the electrode B (the original negative electrode) and flows out of the battery BT from the electrode A (the original positive electrode). Then, the electrode A can be reversed from the original positive electrode to the negative electrode, and the electrode B can be reversed from the original negative electrode to the positive electrode. After the reverse polarity occurs, the rectified DC current continues to enter the battery BT from the electrode B and flows out of the battery BT from the electrode A. At this time, the rectified DC current performs a charging operation on the lead-acid battery BT, and the battery BT becomes forwardly connected in series in the rectifier circuit of this embodiment. By operating the battery positive and negative electrode series point interchange module 102 of this embodiment, the battery BT can be forwardly connected in series or reversely connected in series in the rectifier circuit of this embodiment.

[0130] The current limiting module of this embodiment can limit and constrain the upper limit of the charging and discharging current of the battery charging and discharging device of this embodiment, so that the rectified current does not exceed a certain set current value; and increase the stability, controllability, reliability and safety of the rectified current of this embodiment;

[0131] The current limiting module of this embodiment is a current signal feedback type current limiting module based on a current transformer, including: a potential control module, a signal amplification and adjustment module, and a current signal feedback module;

[0132] The potential control module and the signal amplification and adjustment module of the current limiting module of this embodiment are Figure 3 The potential control modules 104 - 1A and 104 - 2A, and the signal amplification and adjustment modules 104 - 1B and 104 - 2B in the structure of the current stabilization module 104 shown in FIG.

[0133] In this embodiment, the current limiting module actually shares the potential regulating module 104-1A or / and B and the signal amplifying and adjusting module 104-2A or / and B of the current stabilizing module 104 with the current stabilizing module 104, and the shared module is also used as a part of the structure of the current limiting module. At this time, the current limiting module containing the potential regulating module 104-1A or / and B and the signal amplifying and adjusting module 104-2A or / and B has a position adjustment signal output end that is the phototransistor collector p7 and node J9 of the optocoupler U1 and the phototransistor collector p11 and node J13 of the optocoupler U2 in the modules 104-1A and 104-2A.

[0134] like Figure 4 As shown, the current signal feedback module 105 of this embodiment includes: current transformers TA1, TA2, adjustable resistors Rp16, Rp17, Rp18, Rp19, feed voltage output adjustable resistors Rp20, Rp21, rectifier diodes VD15, VD16, and electrolytic capacitor C3;

[0135] The input terminals of the current transformer TA1 or TA2 are P-1 and P-2, and the output terminals are K1 and K2. When the current being measured flows in from P-1 and flows out from P-2 (i.e., passing through the primary coil of the current transformer in the direction from P-1 to P-2), the potential of K1 is positive and the potential of K2 is negative, and the induced current flows from K1 to K2; otherwise, the opposite is true;

[0136] The measured alternating current is passed through the primary coils of current transformers TA1 and TA2 through the wire connected to ac1, and the input and output terminals (P-1, P-2) of TA1 are placed in a mirror image with those of TA2, and K2 of TA1 and TA2 are connected to each other; that is, when the alternating current flows through TA1 and TA2 in its positive half-wave cycle, it flows in from P-1 of TA1 and flows out from P-2, and flows in from P-2 of TA2 and flows out from P-1; when the alternating current flows through TA2 and TA1 in its negative half-wave cycle, it flows in from P-1 of TA2 and flows out from P-2, and flows in from P-1 of TA1;

[0137] The two ends of Rp16 are connected to K1 and K2 of TA1 respectively, and K1 is connected to the positive electrode of VD15 through Rp17; similarly, the two ends of Rp18 are connected to K1 and K2 of TA2 respectively, and K1 is connected to the positive electrode of VD16 through Rp19;

[0138] The positive electrode of the electrolytic capacitor C3 is connected to the negative electrodes of VD15 and VD16 at the same time; the negative electrode of the electrolytic capacitor C3 is connected to K2 of TA1 and TA2 at the same time;

[0139] The two ends of the adjustable resistor Rp20 are connected to the positive and negative electrodes of the capacitor C3 respectively;

[0140] The positive electrode of the electrolytic capacitor C3 is connected to the voltage dividing nodes J17 and J20 in the current stabilization module 104 of this embodiment through the adjustable resistor Rp21;

[0141] The negative electrode of the electrolytic capacitor C3 is connected to the nodes J21 and J22 in the current stabilization module 104 of this embodiment;

[0142] Nodes J17, J20, J21, and J22 are also feedback signal voltage output terminals of the current signal feedback module 105 of this embodiment;

[0143] During operation, by adjusting one or more resistance values ​​of the adjustable resistors Rp16, Rp17, Rp18, Rp19, Rp20, and Rp21, the output voltage U of the feedback signal voltage output terminal of the embodiment can be adjusted. J17-J21 , that is, the voltage between J17 (or J20) and J21 (or J22);

[0144] When the rectifier current is limited, adjust one or more of the adjustable resistors Rp16, Rp17, Rp18, Rp19, Rp20, and Rp21 to make the AC output of ac1 reach a certain set upper limit value I lim(x), When the feedback signal voltage output terminal can output a certain voltage value U J17-J21(x) , the U J17-J21(x) The voltage applied to the base b of VT7 and VT8 of the current stabilizing module 104 can make the potentials of the phase control nodes J10 and J14 of the trigger module 103 at certain potential values ​​V J10(x) 、V J14(x) ; When the AC current output by ac1 increases for some reason (for example, the rectifier current suddenly increases) and exceeds the set upper limit value I lim(x) When J17-J21 Increase to U J17-J21(y) (U J17-J21(y) >U J17-J21(x) ), which causes the potentials of the phase control nodes J10 and J14 of the trigger module 103 to be pulled down to V J10(y) 、V J14(y) (V J10(y) <V J10(x) 、V J14(y) <V J14(x) ), which in turn makes the AC current output by ac1 decrease, inhibits the increase of the AC current output by ac1, and finally makes the AC current output by ac1 not exceed the set upper limit value I lim(x) , or basically at the upper limit value I lim(x) In this way, the alternating current and the rectifier current in the rectifier circuit are limited and stabilized.

[0145] In another embodiment of this embodiment, the battery positive and negative electrode series connection point interchange module is a thyristor group configuration ( Figure 5 ), or a rotary disk swap battery positive and negative terminal connection point interchange module ( Figure 6 );

[0146] like Figure 5 As shown, the thyristor-assembled battery positive and negative electrode series connection point interchange module 106 includes: a thyristor-assembled switch module 106-1, a four-terminal isolated thyristor trigger module 106-2; a trigger switch module 106-3;

[0147] The thyristor assembly switch module 106-1 includes: four unidirectional thyristors (model: 3CT, KP) VT9, VT10, VT11, VT12, four nodes J23, J24, J25, J26, wherein A9 and A11 of VT9 and VT11 are connected to J23, K9 and K11 of VT9 and VT11 are connected to J25 and J26 respectively; K10 and K12 of VT10 and VT12 are connected to J24, and A10 and A12 of VT10 and VT12 are connected to J26 and J25 respectively;

[0148] Nodes J23 and J24 are the serial input terminals of the positive and negative series connection point interchange module of the thyristor group configuration battery in this embodiment, which can be respectively connected to Figure 1 The rectifier module 101 shown in the figure has the series connection points J1 and J2 on the rectifier circuit connected, and J25 and J26 are the series output ends of the thyristor group configuration battery positive and negative series connection point interchange module of this embodiment, which can be respectively connected to the embodiment Figure 1 The positive and negative connections of the battery BT are shown;

[0149] The unidirectional thyristor VT9, VT10, VT11 or VT12 can be turned on when a positive voltage is applied between the A and K poles and a trigger signal is input to the G pole.

[0150] The four-terminal isolated thyristor trigger module 106-2 comprises: a trigger circuit A and a trigger circuit B, both of which have the same structure, and the trigger circuit A or B has the same structure as 103-1 in the first embodiment of the present utility model; wherein the output ends of the two secondary coils of the pulse transformer T3 of the trigger circuit A are respectively connected to G9 and K9, G10 and K10 of the thyristors VT9 and VT10, while the output ends of the two secondary coils of the pulse transformer T4 of the trigger circuit B are respectively connected to G11 and K11, G12 and K12 of the thyristors VT11 and VT12; the trigger circuit A and the trigger circuit B also have respective electrical input nodes J27 and J28, J29 and J30;

[0151] Trigger circuit A, when it inputs electricity from its nodes J27 and J28, can send trigger signals to G9 and K9, G10 and K10 of thyristors VT9 and VT10 through the output ends of the two secondary coils of the pulse transformer T3 at the same time; trigger circuit B is similar;

[0152] The trigger switching module 106-3 of this embodiment includes: a single-pole double-throw relay RL2-SPDT and a rectifier bridge VT13. The switch S2 of the single-pole double-throw relay RL2-SPDT is controlled by the action of the electromagnet. The moving piece p15 of S2 is connected to the node J31, and the static pieces p16 and p17 are connected to the nodes J27 and J29 of the trigger circuits A and B respectively. The nodes J28 and J30 of the trigger circuits A and B are both connected to the node J32. The nodes J31 and J32 are respectively connected to the two upper arms of the rectifier bridge VT13. The connection point (i.e., the outlet end of the pulsating DC power) and the two lower arm connection points (i.e., the bridge entry end of the pulsating DC power) are connected; the two AC input ports of the rectifier bridge VT13 are respectively connected to the power output ports ac3 and ac4 of the single-phase AC power Ua-1; the power supply nodes J33 and J34 of the electromagnet of the single-pole double-throw relay RL2-SPDT are used to input the control signal for controlling the action of the electromagnet (to supply power or cut off the power to the electromagnet), and the nodes J33 and J34 are connected to the output end of the control signal generator (controller);

[0153] The control signal controls the action of the electromagnet of RL2-SPDT, thereby controlling the on / off state of the connection between the moving piece p15 and the stationary pieces 16 and 17 of RL2-SPDT; when the moving piece p15 of the single-pole double-throw relay RL2-SPDT is connected to the stationary piece p16 and disconnected from the stationary piece p17, the electrical input node 27 of the trigger circuit A is connected to the node J31, so that the nodes J31 and J32 are simultaneously connected to the electrical input nodes J27 and J28 of the trigger circuit A; this allows the pulsating DC generated by the rectification of VT13 to pass The current enters and flows through the trigger circuit A through the circuit connected with nodes J31, J27, J28, and J32, providing power for the trigger circuit A, and the trigger circuit A generates and outputs a trigger signal; at this time, the trigger circuit B does not generate and output a trigger signal due to the lack of electrical input; when the moving piece p15 of the single-pole double-throw relay RL2-SPDT is disconnected from the static piece p16 and connected to the static piece p17, it can be inferred from the above process that the trigger circuit B will generate and output a trigger signal, while the trigger circuit A does not generate and output a trigger signal due to the lack of electrical input;

[0154] When the thyristor-assembled battery positive and negative pole series point interchange module 106 of the present embodiment is working, the control signal is used to control the connection on / off state of the moving piece p15 and the static pieces 16 and 17 of RL2-SPDT, so that the trigger circuits A and B do not work at the same time, generate and output the trigger signal, so that the thyristors VT9 and VT10 are turned on at the same time, and V11 and V12 are turned on at the same time, but the former two (VT9, VT10) and the latter two (VT11, VT12) are not turned on at the same time; in this way, when the conduction state of the thyristors of the thyristor-assembled switch module 106-1 is switched between the two states of the former two (VT9, VT10) being turned on at the same time and the latter two (VT11, VT12) being turned on at the same time, the connection nodes J1 and J2 of the positive and negative poles of the battery BT and the rectifier circuit can be interchanged and switched.

[0155] like Figure 6 As shown, the rotating disk swap type battery positive and negative pole series connection point interchange module 107 of this embodiment includes: a rotating disk R1, moving plates p18, p19, static plates p20, p21, nodes J35, J36, J37, J38;

[0156] The moving pieces p18 and p19 are insulated from each other and fixed on the turntable R1, and can rotate around the center of the turntable when the turntable R1 rotates clockwise or counterclockwise around the center of the turntable; the moving pieces p18 and p19 are connected to the nodes J35 and J36 respectively, and the static pieces p20 and p21 are connected to the nodes J37 and J38 respectively;

[0157] The nodes J35 and J36 are the serial input terminals of the contact exchange module 107 of this embodiment, and the nodes J37 and J38 are the serial output terminals of the contact exchange module 107 of this embodiment;

[0158] The rotating disk R1 rotates clockwise or counterclockwise around the center of the rotating disk, so that p18 is connected only to p20, p19 is connected only to p21, and the two are connected at the same time, or p18 is connected only to p21, p19 is connected only to p20, and the two are connected at the same time;

[0159] During operation, nodes J35 and J36 are connected to the series points J1 and J2 on the rectifier circuit of the rectifier module 101 respectively, and nodes J37 and J38 are connected to the positive and negative poles of the battery BT respectively; in this way, by rotating the turntable R1 clockwise or counterclockwise around the center of the turntable, the positive and negative poles of the battery BT and the connection nodes J1 and J2 of the rectifier circuit can be interchanged and switched.

[0160] Another implementation mode of this embodiment is a half-open and half-closed trigger type thyristor trigger module, such as Figure 7As shown, it is a single junction transistor single tube analog / digital conversion four-terminal isolation full-wave trigger type half-open half-closed trigger type thyristor trigger module 108, including: a single junction transistor synchronous pulse generation module 108-1, a digital control trigger switch module 108-2, and a synchronous signal analog / digital conversion module 108-3;

[0161] The single junction transistor synchronous pulse generating module 108-1 includes: a rectifying and step-down voltage stabilizing circuit composed of a rectifier bridge (VD17-VD20), a step-down resistor R7, and voltage stabilizing diodes VDz9 and VDz10, and an oscillating circuit composed of a capacitor C4, phase-shift adjustable resistors Rp22 and Rp23, a compensation resistor R8, a discharge resistor R9, and a rectifier diode VD21; the internal structure and working principle of the module are similar to the trigger circuit shown in the aforementioned 103-1 of this embodiment, and the specific connections are as follows: Figure 7 As shown in;

[0162] The AC input end of the rectifier bridge (VD17-VD20) is connected to the electrical output ends ac3 and ac4 of the AC power Ua-1; a phase control node J39 is provided on the connection line between Rp22 and Rp23, and the node J39 and the bridge tail node J41 can be connected to the position adjustment signal output end of the current stabilization module 104;

[0163] When working, the single junction transistor synchronous pulse generating module 108-1 outputs pulses from the node J40;

[0164] The digital control trigger switch module 108-2 includes: optical couplers U3, U4, pulse transformers T5, T6, and adjustable resistors Rp24, Rp25;

[0165] The positive electrodes of the light-emitting diodes of U3 and U4 are connected to each other and to the node J40 of the synchronization pulse generating module 108-1, and the negative electrodes of the light-emitting diodes of U3 and U4 are connected to each other and to the node J41 of the synchronization pulse generating module 108-1, and J41 is the connection point of the two lower bridge arms of the rectifier bridge (VD17-VD20);

[0166] When working, the pulse current emitted by the synchronous pulse generating module 108-1 is divided into two paths from the node J40 and input into the anodes of the diodes of U3 and U4 respectively, and then flows out from the cathodes of the diodes of U3 and U4 respectively, and after converging at the node J41, flows back into the lower arm (VD19, VD20) of the rectifier bridge (VD17-20);

[0167] The collector of the phototransistor of U3 (or U4), the primary coil of T5 (or T6), Rp24 (or Rp25), and the node J44 are connected in series in sequence, forming a circuit that allows current to flow from the emitter J42 (or J43) of the phototransistor, flow through the collector of the phototransistor, flow through the primary coil of T5 (or T6) and Rp24 (or Rp25), and flow out from the node J44; the pulse output ends of the two secondary coils of T5 (or T6) are respectively connected to G1, K1 and G3, K3 of the thyristors VT1 and VT3 (or G2, K2 and G4, K4 of the thyristors VT2 and VT4) in the rectifier module 101, so as to provide trigger pulses to VT1, VT3 (or VT2, VT4) when working;

[0168] The optocoupler U3 (or U4) in the digital control trigger switch module 108-2 functions as a digital control switch tube, that is, when a control signal (a pulse signal from the trigger module 108-1) is input to its control electrode (the positive and negative electrodes of the light-emitting diode of U3 or U4), its main circuit (phototransistor) is turned on, thereby allowing the power current to flow from the emitter J42 (or J43) of the phototransistor into and through the primary coil of T5 (or T6), and the electromagnetic induction of the secondary coil of T5 (or T6) outputs a trigger signal to VT1, VT3 (or VT2, VT4);

[0169] If the above-mentioned digital control switch tube optocoupler is replaced by other electronic switch type components, such as unidirectional thyristor, MOS tube, single chip microcomputer, etc., and equipped with the known and mature circuit structure required for the work, the digital control switch function similar to the optocoupler can be realized;

[0170] The synchronous signal analog / digital conversion module 108-3 includes: step-down resistors R10, R11, rectifier diodes VD22, VD23, digital-to-analog conversion chip U5 (LM358), positive power supply VCC+, negative power supply VEE-, and positive and negative power supply common ground GND (common terminal); the specific connection structure is as follows Figure 7 As shown;

[0171] During operation, the alternating current analog signals input by ac1 and ac2 are input to the synchronous signal analog / digital conversion module 108-3 and are converted into analog / digital signals inside the module. Then, the digital signal output terminals U5 pin 1 and U5 pin 7 output positive or negative levels (i.e., digital signals). The levels output by U5 pin 1 and U5 pin 7 are opposite in positive and negative, i.e., when pin 1 outputs a positive level, pin 7 outputs a negative level, and when pin 1 outputs a negative level, pin 7 outputs a positive level.

[0172] like Figure 7As shown, U5 pin 1 and pin 7 are respectively connected to the emitters J42 and J43 of the phototransistors U3 and U4 of the digital control trigger switch module 108-2, that is, the digital signal (positive or negative level) output by U5 pin 1 (or U5 pin 7) is input into the emitter of the phototransistor of the optocoupler U3 (or U4), forming a current in the main circuit of the optocoupler (trigger switch);

[0173] By the way, the synchronization signal analog / digital conversion module 108-3 of the present embodiment can also be replaced by other synchronization signal analog / digital conversion modules with the same function (for example, based on), as long as it can achieve the same function as the synchronization signal analog / digital conversion module 108-3: convert the alternating current analog signals input by ac1 and ac2 into synchronous digital signals and output them at two output ports, and the positive and negative levels output by the two output ports are opposite; for example, other operational amplifiers or voltage comparators (such as LM393) or MCU chips are selected as the digital-to-analog conversion chip U5, and then equipped with the known and mature circuit structure required for the work, the same function as the synchronization signal analog / digital conversion module 108-3 based on the above-mentioned operational amplifier LM358 can be achieved;

[0174] When working, the synchronization signal analog / digital conversion module 108-3 of this embodiment provides a level (positive level or negative level) to the main circuit (phototransistor) of the digital control switch tube (U3, U4) of the digital control trigger switch module 108-2, and the single junction transistor synchronization pulse generation module 108-1 provides a pulse current to the control electrode (light emitting diode) of the digital control trigger switch module 108-2 as a control signal of the digital control switch tube 108-2; when the level is a positive level and the control signal, i.e., the pulse current, is input, the main circuit of the digital control switch tube 108-2 is turned on, allowing the thyristor to trigger The signal output terminal (secondary coil of pulse transformer T5 or T6) sends a trigger signal to the thyristors VT1, VT3 (or VT2, VT4) in the rectifier module 101, and makes the thyristors VT1, VT3 (or VT2, VT4) conduct at the same time; when the level is a negative level, since the main circuit of the 108-2 digital control switch tube is not conducting, the thyristor trigger signal output terminal (secondary coil of pulse transformer T5 or T6) related to the non-conducting main circuit does not send a trigger signal to the thyristors VT1, VT3 (or VT2, VT4) in the rectifier module 101;

[0175] Therefore, under the control of the output level signal of the synchronization signal analog / digital conversion module 108-3, the thyristors VT1, VT3 (or VT2, VT4) can be triggered to conduct at the same time, while VT2, VT4 (or VT1, VT3) are not conducted at the same time.

[0176] The single-junction transistor single-tube analog / digital conversion four-terminal isolation full-wave trigger type half-open half-closed trigger type thyristor trigger module 108 of this embodiment is conducive to simplifying the circuit structure of the current stabilization module. For example, Figure 3 The ac3 and ac4 of 104-1 are respectively connected to the full-wave rectifier bridge (similar to the embodiment of the present invention) Figure 7 By connecting the bridge head node (the connection point of the two upper bridge arms) and the bridge tail node (the connection point of the two lower bridge arms) of the rectifier bridge VD17-VD20 in 108-1, a full-wave current stabilization circuit that can stabilize the positive and negative half-wave rectifier currents can be realized, and a full-wave isolation mixed voltage change rate amplification analog single-board preset voltage signal type current stabilization module can be realized;

[0177] Other implementation methods of this embodiment are as follows: Figure 3 The signal amplification and adjustment modules 104-1B and 104-2B of the medium current stabilization module 104 respectively connect the nodes J17 and J20 to the positive electrodes p9 and p13 of the U1 and U2 light-emitting diodes, and respectively connect the nodes J21 and J22 to the negative electrodes p10 and p14 of the U1 and U2 light-emitting diodes, so as to obtain a full-wave isolated mixed voltage change rate non-amplified analog dual-plate preset voltage signal current stabilization module to simplify the circuit;

[0178] In another embodiment of the present invention, one or more adjustable resistors are arranged on an operation panel fixed on the housing of the device of the present invention to facilitate manual adjustment on site.

[0179] In another implementation mode five of the present embodiment, when the battery is connected in series in the thyristor rectifier circuit, a circuit overcurrent and overvoltage protection device, such as a fuse or a circuit breaker, is provided between the DC path of the rectifier circuit and the battery to prevent secondary damages such as short circuit, overvoltage, overcharging, etc. from being caused to the battery, internal circuits and components of the device when a circuit fault occurs.

[0180] In another implementation mode six of the present embodiment, only module 103-1 in the thyristor trigger module 103 is connected to the thyristor rectifier module 101 for open-loop rectification triggering. Then, the rectifier circuit is changed into a half-wave rectifier circuit. At this time, the thyristor rectifier module 101 is changed from a single-phase full-wave fully-controlled thyristor rectifier module to a single-phase half-wave half-controlled thyristor rectifier module. The module 103-1 is a single-junction transistor single-tube two-end isolated half-wave triggered half-open and half-closed triggered trigger module.

[0181] Example 2

[0182] The lead-acid battery charging and discharging device of this embodiment includes: a positive and negative series-connected thyristor rectifier module, a battery positive and negative pole series connection point interchange module, a semi-open and semi-closed trigger thyristor trigger module, a current stabilization module, and a current limiting module;

[0183] The thyristor in this embodiment is a unidirectional thyristor (3CT KP type);

[0184] like Figure 8 As shown, the thyristor rectifier module capable of positive and negative series connection in this embodiment is a single-phase half-wave fully controlled thyristor rectifier module 109, comprising: a unidirectional thyristor VT15, wherein the cathode K15 of VT15 is connected to the output terminal ac2 of the single-phase AC power supply Ua; the current direction of the positive half-wave period of the single-phase AC power supply Ua is: flowing out of the power supply Ua from the output terminal ac1 of Ua, and flowing back to the power supply Ua from ac2; the output terminal ac1 of Ua is connected to the node J45, and the anode A15 of VT15 is connected to the node J46;

[0185] The battery positive and negative pole serial point interchange module of this embodiment is a double-pole double-throw battery positive and negative pole serial point interchange module 110, and its structure and function are the same as the double-pole double-throw battery positive and negative pole serial point interchange module 102 described in Example 1 of the utility model; the double-pole double-throw battery positive and negative pole serial point interchange module 110 has its serial input terminals J45 and J46 connected to the output terminals ac1 of Ua and A15 of VT15, respectively, and its serial output terminals J47 and J48 connected to the positive and negative poles of the battery BT, respectively;

[0186] The double-pole double-throw type battery positive and negative pole serial connection point interchange module 110 of this embodiment can interchange and connect the positive and negative poles of the battery BT to the Ua output terminal ac1 and the A15 pole of VT15, thereby realizing the forward serial connection, reverse serial connection and switching between the two serial connection states of the battery BT in the rectifier circuit;

[0187] The voltage of the AC power source Ua in this embodiment is 3-240V; the voltage between the positive and negative electrodes of the battery is 0-210V;

[0188] The absolute value of the voltage between the positive and negative electrodes of the battery in this embodiment is less than the voltage value of the AC power source Ua in this embodiment;

[0189] The semi-open and semi-closed triggered thyristor trigger module of the present embodiment is a single-junction transistor single-tube single-end direct half-wave triggered semi-open and semi-closed triggered thyristor trigger module 111, comprising a rectifier step-down voltage stabilizing circuit formed by a rectifier diode VD24, a resistor R12, VDz11, and VDz12 connected in series in sequence, wherein VDz11 and R12 are connected to each other, and a node J51 is provided on the circuit, the positive electrode of the rectifier diode VD24 is connected to ac1, and the negative electrode of VDz12 is connected to ac2, that is, when working, the positive half-cycle current of Ua flows into the trigger circuit 111 from ac1, and flows out of the trigger circuit 111 from ac2;

[0190] The trigger module 111 also includes an oscillation and pulse output circuit composed of adjustable resistors Rp26, Rp27, a compensation resistor R13, a discharge resistor R14, a single junction transistor VT16, a capacitor C5, and a rectifier diode VD25; wherein, a node J51, an adjustable resistor Rp27, Rp26, a capacitor C5, and ac2 are connected in series in sequence; J51, R13, VT16, R14, and ac2 are connected in series in sequence; and the B1 and B2 poles of VT16 are connected to R14 and R13 respectively, and the E pole of VT16 is connected to the node J52, and J52 is a node in the circuit connecting Rp26 and capacitor C5; the positive pole of VD25 is connected to the B1 pole of VT16, and the negative pole of VD25 is connected to the G15 pole of the thyristor VT15 of the rectifier module 109; Rp26 and Rp27 are connected to each other, and a phase control node J53 is provided on the circuit for connecting to the current stabilization module;

[0191] The trigger module 111 can send a trigger signal to G15 of VT15 through the negative pole of VD25;

[0192] As can be seen from the above, the trigger connection mode between the thyristor trigger module 111 and the thyristor rectifier module 109 in this embodiment is an open-loop rectifier trigger connection;

[0193] The current stabilization module of this embodiment is a half-wave non-isolated tube voltage change rate amplification analog single-board preset voltage signal type current stabilization module 112, including: a potential control and signal amplification and allocation module 112-1 composed of an NPN transistor VT17 and an emitter adjustable resistor Rp28, and a tube voltage collection and voltage division module 112-2 composed of voltage collection and voltage division adjustable resistors Rp29 and Rp30; wherein nodes J46, Rp29, Rp30, and ac2 are connected in series in sequence to form a tube voltage collection and voltage division module circuit, and a voltage division module is provided on the circuit where Rp29 and Rp30 are connected to each other. The voltage between nodes J46 and ac2, i.e., the voltage between the A15 pole and the K15 pole of the unidirectional thyristor VT15 (the voltage between the cathode and the anode of the thyristor VT15), can be obtained through the tube voltage collection and voltage division module circuit, and the voltage division is outputted externally at the voltage division node J54; the base b of the transistor VT17 is connected to the voltage division node J54, the emitter e of the transistor VT17 is connected to ac2 through Rp28, and the collector c of the transistor VT17 (which is also the output terminal of the adjustment signal of the current stabilization module 112) is connected to the phase control node J53 of the trigger circuit 111;

[0194] One end of the voltage division node J54, Rp30 connected to ac2 is also the voltage division output end of the tube voltage collection and voltage division module 112-2;

[0195] One end of the transistor VT17 where the collector c, Rp28 and ac2 are connected is also the output end of the adjustment signal of the current stabilization module 112 .

[0196] One end of the adjustable resistor Rp29 connected to J46 and one end of the adjustable resistor Rp30 connected to ac2 are equivalent to two voltage collection ports of the tube voltage collection and voltage division module 112-2 or the current stabilization module 112, which are respectively connected to the voltage collection points J46 and ac2 (A15 and K15 of VT15);

[0197] In this embodiment, the tube voltage collection and voltage dividing circuit of the current stabilization module 112 obtains the tube voltage U of the thyristor VT15. AK15 And generate a voltage divider V at the voltage divider node J54 J54 , the voltage divided is the base voltage of transistor VT17 V b , adjust the base voltage V b , the potential V of the phase control node J53 of the trigger circuit 111 can be adjusted J53 , so that V J53 The voltage U between A15 and K15 of the thyristor VT15 increases or decreases, thereby realizing the control angle of the trigger signal of the trigger circuit 111 and the adjustment of the conduction current of the thyristor VT15. For example, when the battery BT is connected in series with the rectifier circuit in the forward direction, the positive and negative voltages of the battery BT decrease as the battery discharges, which will cause the voltage U between A15 and K15 of the thyristor VT15 to increase. Ak15 As the battery discharges, it increases (the tube voltage U Ak15 The size is related to the Ua voltage and the battery voltage. When the battery is connected in series with the rectifier circuit in the forward direction, U Ak15 =Ua-battery voltage absolute value, when the battery is connected in series with the rectifier circuit in reverse, U Ak15 =Ua+absolute value of battery voltage), U Ak15 When U increases, if the electrical angle (conduction angle) of the thyristor VT15 remains unchanged, the conduction current will increase. However, in this embodiment, U Ak15 When it increases, it will cause the base potential V b Increase, thereby phase regulating the node potential V J53 It is pulled down, so that the conduction angle of the thyristor VT15 becomes smaller and the trend of the conduction current increasing is suppressed, thereby achieving the stability or constancy of the conduction current of the thyristor VT15;

[0198] When working, the trigger module 111 of this embodiment sends a trigger pulse to the thyristor VT15 of the rectifier module 109 during the positive half-wave period of the alternating current Ua, and VT15 rectifies the positive half-wave current of the alternating current Ua; at the same time, the preset voltage signal type current stabilizing module 112 of this embodiment is in real time based on the tube voltage U of the thyristor VT15. Ak15 The changes in the voltage will affect the conduction angle of the thyristor VT15 accordingly, so that the rectifier current is not affected or less affected by the changes in the battery voltage or Ua, thereby playing a role in stabilizing and constant current for the rectifier current.

[0199] In this embodiment, the voltage signal type current stabilization module 112 has a voltage collecting and voltage dividing module 112-2 in which the voltage dividing node J54 outputs the voltage divided by the base b of the transistor VT17 (V J54 The adjustment signal outputted by the adjustment signal output terminal VT17 collector c contains the battery voltage information and the information of the forward and reverse series connection state of the battery in the rectifier circuit (when other conditions are the same, the V 54 (Forward series connection) is different from the V J54 (negative series connection), that is, V J54 (Forward cascade connection) <V J54 (negative series connection)); and when the positive and negative voltages of the battery are positive voltage, 0V, or negative voltage, the preset voltage signal type current stabilization module 112 can still output a non-zero adjustment signal to the trigger module; the non-zero adjustment signal refers to a non-zero electrical signal or physical signal.

[0200] Embodiment Other implementation modes 1, such as Fig. 9 As shown, the half-open and half-closed triggered thyristor trigger module of this embodiment is a RC phase shift half-wave triggered half-open and half-closed triggered trigger module 113, including a transformer T7 with a tap, adjustable resistors Rp31, Rp32, capacitor C6, and rectifier diode VD26; its internal connection structure is as shown Fig. 9 As shown; the primary coil input end of the transformer T7 of the RC phase-shift trigger module 113 is respectively connected to the electrical output ends ac1 and ac2 of the AC power supply Ua, and the output end of the trigger pulse, that is, the negative electrode of VD26, is connected to G15 of the thyristor VT15 of the rectifier module 109 of this embodiment, and nodes J55 and J56 are respectively provided on the two electrodes of the capacitor C6. Node J55 is a phase control node and can be connected to the adjustment signal output end (collector c of transistor VT17) of the current stabilizing module 112 of this embodiment, and node J56 is connected to ac2 or K15 of the thyristor VT15, so as to realize the regulation and control of the potential of the phase control node J55 by the current stabilizing module 112.

[0201] In the other implementation mode 2 of this embodiment, the battery positive and negative poles series connection point interchange module is a circuit constructed by thyristors, and the circuit constructed by the thyristors is the same as the thyristor group configuration battery positive and negative poles series connection point interchange module 106 described in the other implementation mode 1 of the embodiment 1 of the utility model, such as Figure 5 As shown;

[0202] When working, the thyristor group configuration series point interchange module 106 has J31 and J32 (or ac3 and ac4) of 106-3 connected to ac1 and ac2 of the rectifier module 109 of this embodiment respectively, and J23 and J24 of 106-1 connected to J45 and J46 (i.e., ac1 and A15 of VT15) of this embodiment respectively; J25 and J26 are connected to the positive and negative electrodes of the battery BT of this embodiment respectively.

[0203] Other implementation manner three of this embodiment, the battery charging and discharging device of this embodiment further includes a current limiting module, and the current limiting module includes a potential control and signal amplification and allocation module and a current signal feedback module;

[0204] The potential control and signal amplification module is the Figure 8 The potential control and signal amplification and allocation module 112-1 of the current stabilization module 112 shown; that is, the current limiting module and the current stabilization module of this embodiment share the same potential control and signal amplification and allocation module 112-1 and its connection structure with the trigger module 111;

[0205] The current signal feedback module is the same as the current signal feedback module 105 of the current limiting module in the first embodiment of the utility model, and its feedback signal voltage output terminals J17 and J21 can be connected to the nodes J54 and ac2 in the current stabilization module 112 of the present embodiment respectively;

[0206] In another fourth implementation mode of the present embodiment, one or more of the trigger module, preset voltage-dividing and current-stabilizing module, and current-limiting module of the present embodiment can be replaced by a functional circuit based on a single-chip microcomputer and realize the functions of each replaced module.

[0207] Example 3

[0208] The lead-acid battery charging and discharging device of this embodiment includes: a positive and negative series-connected thyristor rectifier module, a battery positive and negative pole series connection point interchange module, a semi-open and semi-closed trigger thyristor trigger module, a current stabilization module, and a current limiting module;

[0209] like Fig.10 As shown, the thyristor rectifier module capable of positive and negative series connection in this embodiment is a three-phase half-wave half-controlled thyristor rectifier module 114, comprising a three-phase full-bridge rectifier bridge (VT18-VT23), wherein the common connection point (bridge head) of the upper bridge arm (VT18-VT20) of the rectifier bridge (VT18-VT23) is connected to the node J57, and the common connection point (bridge tail) of the lower bridge arm (VT21-V23) is connected to the node J58, and the connection point (bridge body) of the upper bridge arm and the lower bridge arm of each bridge in the three-way bridge is connected to L1, L2, and L3 respectively, and L1, L2, and L3 are the electrical output ports of the three-phase line of the three-phase AC power supply U; U is a 3-380V three-phase AC power supply;

[0210] The battery positive and negative poles serial connection point interchange module of this embodiment is the same as the battery positive and negative poles serial connection point interchange module described in Embodiments 1 and 2 of the utility model; when working, the bridge head node J57 and the bridge tail node J58 of the rectifier bridge (VT18-VT23) of the rectifier module 114 of this embodiment are respectively connected to the serial input port (for example, J1 and J2 of module 102, or J23 and J24 of module 106-1, or J35 and J36 of module 107) of the battery positive and negative poles serial connection point interchange module 102;

[0211] The absolute value of the voltage between the positive and negative electrodes of the battery in this embodiment is less than the voltage value of the three-phase AC power supply U in this embodiment;

[0212] The semi-open and semi-closed triggered thyristor trigger module of this embodiment is a single-junction transistor single-tube three-terminal isolated half-wave triggered semi-open and semi-closed triggered trigger module 115, including: a pulse generating circuit U6, a pulse transformer T8, a rectifier diode VD27, a single-phase AC power supply Ua and its electrical output ports ac1 and ac2; Ua is electrically synchronized with the L1 phase of the three-phase AC power U of this embodiment;

[0213] ac1 is connected to the power input terminal of the pulse generating circuit U6, the pulse output port P22 of the pulse generating circuit U6 is connected to the input terminal of the primary coil of the pulse transformer T8, the output terminal of the primary coil of the pulse transformer T8 is connected to the positive electrode of the rectifier diode VD27, and the negative electrode of VD27 is connected to ac2;

[0214] The output ports of the three secondary coils of the pulse transformer T8 are connected to G18 and K18, G21 and K21, G22 and K22 of the thyristors VT18, VT21 and VT22 respectively; as can be seen from the above, the connection is an open-loop rectifier trigger connection;

[0215] The pulse generating circuit U6 and the pulse transformer T8 in the thyristor trigger module 115 of this embodiment can be formed by the embodiment 1 of the utility model. Figure 2 The trigger circuit 103-1 in the embodiment is replaced by the pulse transformer T1 in the trigger circuit 103-1, and the pulse transformer T8 in the thyristor trigger circuit 115 in the embodiment is replaced;

[0216] When working, the pulse generating circuit U6 transmits the synchronous pulse current (synchronized with the L1 phase of the three-phase AC power U) to the primary coil of the pulse transformer T8, and the primary coil of the pulse transformer T8 then electromagnetically induces a synchronous pulse signal on the three secondary coils of T8 at the same time and transmits it to G18 and K18, G21 and K21, G22 and K22 of the thyristors VT18, VT21, and VT22 of the rectifier module 114 respectively, thereby triggering the thyristors VT18, VT21, and VT22 to be turned on at the same time; at this time, the thyristors VT19, VT20, and VT23 are not turned on;

[0217] The pulse generating circuit U6 in the trigger module 115 of this embodiment is provided with a phase control node J59, which is equivalent to the phase control node J59 of the embodiment 1 of the present utility model. Figure 2 The phase control node J10 in the trigger circuit 103-1 is used to connect to the position adjustment signal output end of the current stabilization module (for example, to the phase adjustment signal output end of the current stabilization module in the embodiment 1 of the present utility model). Figure 3 The emitter P7 of the phototransistor of the optocoupler U1 in 104 is connected);

[0218] The preset voltage signal type current stabilizing module of this embodiment is different from the embodiment 1 of the utility model Figure 3 The preset voltage signal type current stabilizing module 104 shown in FIG.

[0219] Other implementations of this embodiment include a current limiting module, which is the same as the current limiting module of Example 1 of the utility model, and its position adjustment signal output end can be connected to the phase control node J59 and ac2 of the trigger module 115 of this embodiment respectively;

[0220] Other implementation modes of this embodiment: one or more of the trigger module, preset voltage-dividing and current-stabilizing module, and current-limiting module of this embodiment can be replaced by a functional circuit based on a single-chip microcomputer and realize the functions of each replaced circuit;

[0221] Other implementation modes of this embodiment are as follows: one or more of the trigger module, preset voltage-dividing and current-stabilizing module, and current-limiting module of this embodiment can be replaced by functional circuits based on a single-chip microcomputer and realize the functions of the replaced circuits; further, the six-terminal full-wave trigger type semi-open and semi-closed trigger type trigger module based on a single-chip microcomputer can make VT19, VT21, and VT23 conduct at the same time while VT18, VT20, and VT22 are not conducted at the same time, and make VT20, VT22, and VT23 conduct at the same time while VT18, VT19, and VT21 are not conducted at the same time, thereby realizing full-wave cross-contact of the three-phase rectifier bridge (VT18-VT23) with different-path bridge arms, so that the thyristor rectifier module at this time becomes a three-phase full-wave fully-controlled thyristor rectifier module, and the trigger connection mode of the six-terminal full-wave trigger type semi-open and semi-closed trigger type trigger module based on a single-chip microcomputer and the three-phase rectifier bridge VT18-VT23 is the cross-contact type with different-path bridge arms.

[0222] Example 4

[0223] The battery charging and discharging device of this embodiment is as follows Fig.11 As shown, it includes two or more, for example, three, charging and discharging channels CH1, CH2, and CH3, and the circuit structure of each charging and discharging channel is the same, and the circuit structure of each charging and discharging channel is the same as the battery charging and discharging device described in Embodiment 1 or 2 of the utility model;

[0224] The charging and discharging channel CH1 (or CH2 or CH3) is connected to the two connection ports of the secondary coil of the isolation transformer T9 (or T10 or T11) through its AC input port J60, J61 (or J62, J63 or J64, J65) through a double-pole single-throw relay RL4-DPST (or RL5-DPST or RL6-DPST); the two connection ports of the primary coil of the isolation transformer T9 (or T10 or T11) are respectively connected to the AC power lines L1, N (or L2, N or L3, N); L1, L2, L3, N are power lines of a three-phase four-wire AC power supply U, wherein L1, L2, L3 are live wires and N is a neutral wire;

[0225] When working, L1 (or L2 or L3) and N provide AC power to the charge and discharge channel CH1 (or CH2 or CH3) through the AC power input ports J60 and J61 (or J62, J63 or J64 and J65);

[0226] The battery charging and discharging device of this embodiment also includes a controller ctr1, which is connected between the port (nodes J66, J67) where the electromagnet of RL4-DPST (and RL5-DPST, and RL6-DPST) is powered and the power ports Pow1-1, Pow1-2; when working, ctr1 implements power-on and power-off behaviors on the circuit between the port (J66, J67) where the electromagnet is powered and the power ports (Pow1-1, Pow1-2) according to control requirements (for example, when a certain time or temperature or voltage or current value is reached, the circuit is powered on and off), so as to realize the control of the action of the electromagnet and thus the on and off of RL4-DPST (and RL5-DPST, and RL6-DPST);

[0227] The ctr1 can be a time controller (such as a time switch KG316T-D), a temperature controller (such as a temperature switch PY-SM5), a voltage and current controller, etc.; the controller can also be a time, temperature, voltage and current controller or a relay based on PLC S7-200, 8051 or STM32 microcontroller;

[0228] The battery charging and discharging device of this embodiment also includes a controller ctr2, which is connected between the power supply input end of the electromagnet of the battery positive and negative poles serial connection point interchange module in the circuit structure of the charging and discharging channel CH1 (and CH2, and CH3) (for example, J5 and J6 of RL1-DPDT in module 102 of embodiments 1 and 2 of the present invention; or J33 and J34 of RL2-SPDT in 106-3; or J49 and J50 of RL3-DPDT in module 110) and the power supply ports Pow2-1 and Pow2-2; when working, ctr2 implements power on and off behavior of the circuit between the port where the electromagnet is powered and the power supply port (Pow2-1, Pow2-2) according to the control requirements (for example, when a certain time or temperature or voltage or current value is reached, the circuit is powered on and off), so as to realize the control of the action of the electromagnet, thereby realizing the operation of interchange and reversing the connection between the positive and negative poles of the battery and the two serial connection points on the rectifier circuit;

[0229] The controller ctr2 is similar to the controller ctr1.

[0230] Furthermore, one controller controls more than two switches, contact interchange modules, or controls more than two charge-discharge channels at the same time; or, one switch, one contact interchange module, one charge-discharge channel is controlled by more than two controllers at the same time;

[0231] The battery charging and discharging device of this embodiment further includes: an adjustable resistor in the charging and discharging channel, an operation panel, and a DC overcurrent and overvoltage protection device;

[0232] The adjustable resistors include: phase-shift adjustable resistors, collector adjustable resistors, emitter adjustable resistors, voltage sampling and voltage division adjustable resistors, and voltage feeding output adjustable resistors;

[0233] The operation panel is arranged on the outer surface of the battery charging and discharging device, and one or more of the controller and the adjustable resistor of the charging and discharging channel are arranged on the operation panel;

[0234] The DC overcurrent and overvoltage protection device includes: a fuse, a circuit breaker, or one or more thereof;

[0235] The DC over-current and over-voltage protection device is arranged in the DC circuit of the rectifier circuit and connected between the contact exchange module and the battery electrodes.

Claims

1. A battery charging and discharging device, It is characterized in that The device can reverse the polarity of a storage battery whose positive and negative poles can be reversed by charging and discharging, and can charge and discharge the storage battery before and / or after the polarity reversal; The device comprises: a positive and negative series connection type thyristor rectifier module, a battery positive and negative series connection point interchange module, and a semi-open and semi-closed trigger type thyristor trigger module; the positive and negative series connection type thyristor rectifier module is connected with the battery positive and negative series connection point interchange module and the semi-open and semi-closed trigger type thyristor trigger module, and the battery positive and negative series connection point interchange module is connected with the battery; the specific connection structure is as follows: The forward and reverse series-connected thyristor rectifier module comprises two series connection points in the rectifier circuit and a thyristor; the two series connection points are not directly connected to each other; The thyristor is a unidirectional thyristor, including a G pole and a K pole of the thyristor; The battery positive and negative pole serial connection point interchange module includes two serial connection input terminals and two serial connection output terminals; The half-open and half-closed triggered thyristor trigger module comprises a trigger signal output terminal; The battery comprises a positive electrode and a negative electrode; The positive and negative series connection type thyristor rectifier module and the battery are connected to each other through the battery positive and negative pole series connection point interchange module, and the connection enables the battery to be connected in series in the positive direction or in the reverse direction in the rectifier circuit; that is, the two series connection points in the rectifier circuit included in the positive and negative series connection type thyristor rectifier module are respectively connected to the two series connection input ends of the battery positive and negative pole series connection point interchange module, and the two series connection output ends of the battery positive and negative pole series connection point interchange module are respectively connected to the positive and negative poles of the battery; The trigger signal output end of the semi-open and semi-closed trigger type thyristor trigger module is connected to the G pole and K pole of the thyristor in the thyristor rectifier module capable of positive and negative series connection, that is, a trigger connection is realized; The silicon controlled rectifier module capable of positive and negative series connection refers to a silicon controlled rectifier module that can connect the rectifier circuit and the battery in a positive and negative series connection in a certain rectification mode during rectification operation without causing a short circuit between the positive and negative electrodes of the battery; The rectifier circuit refers to an electrical path that allows electricity flowing out of one port of the power supply to flow through the rectifier module and the load and then flow back to the other port of the power supply; The forward series connection means that when the positive and negative electrodes of the battery are connected in series in the rectifier circuit, the rectified direct current flows into the battery from the positive electrode of the battery and flows out of the battery from the negative electrode of the battery; the reverse series connection means that when the positive and negative electrodes of the battery are connected in series in the rectifier circuit, the rectified direct current flows into the battery from the negative electrode of the battery and flows out of the battery from the positive electrode of the battery; The structure of the battery positive and negative pole serial connection point interchange module can interchange and reverse its two serial input terminals and connect them to its two serial output terminals respectively; The semi-open and semi-closed triggered thyristor trigger module refers to that when the thyristor trigger module triggers the thyristor in the rectifier module, the same trigger signal output terminal of the thyristor trigger module outputs a trigger signal only in the positive half-wave cycle or the negative half-wave cycle of the alternating current, and does not output a trigger signal in the negative half-wave cycle or the positive half-wave cycle of the alternating current; during full-wave rectification, more than two trigger signal output terminals also present a semi-open and semi-closed or one open and the other closed working characteristic with respect to each other, that is, when a part of the trigger signal output terminals output a trigger signal to the outside, another part of the trigger signal output terminals do not output a trigger signal to the outside; The positive and negative electrodes of the battery are respectively connected to the two series connection points in the above-mentioned rectifier circuit through the contact point interchange module; thus, when the battery positive and negative electrode series connection point interchange module interchanges its two series connection input terminals, and connects them to its two series connection output terminals respectively, the positive and negative electrodes of the battery can be interchanged, and connected to the two series connection points on the rectifier circuit respectively, thereby realizing the switching of the battery in the rectifier circuit between forward series connection, reverse series connection and the two series connection states; The trigger connection mode of the semi-open and semi-closed trigger type thyristor trigger module and the forward and reverse series connected thyristor rectifier module is an open-loop rectifier trigger connection; The open-loop rectification trigger connection means that when the thyristor rectification module is triggered by the trigger connection mode and performs rectification operation, the rectification circuit formed at any time during the rectification operation is open-loop and not end-to-end connected.

2. The battery charging and discharging device according to claim 1, It is characterized in that The forward and reverse series-connected thyristor rectifier modules include: single-phase full-wave fully-controlled thyristor rectifier module, single-phase half-wave half-controlled thyristor rectifier module, single-phase half-wave fully-controlled thyristor rectifier module, three-phase half-wave half-controlled thyristor rectifier module or three-phase full-wave fully-controlled thyristor rectifier module; The battery positive and negative pole serial connection point interchange module is: a double-pole double-throw type battery positive and negative pole serial connection point interchange module, a thyristor group type battery positive and negative pole serial connection point interchange module or a rotary disk type battery positive and negative pole serial connection point interchange module; The half-open and half-closed triggered thyristor trigger module includes: a single junction transistor double tube four-terminal isolation full-wave triggered half-open and half-closed triggered thyristor trigger module, a single junction transistor single tube analog / digital conversion four-terminal isolation full-wave triggered half-open and half-closed triggered thyristor trigger module, a single junction transistor single tube two-terminal isolation half-wave triggered half-open and half-closed triggered thyristor trigger module, a single junction transistor single tube single-end direct half-wave triggered half-open and half-closed triggered thyristor trigger module, a resistor-capacitor phase shift half-wave triggered half-open and half-closed triggered thyristor trigger module, a single junction transistor single tube three-terminal isolation half-wave triggered half-open and half-closed triggered thyristor trigger module or a six-terminal full-wave triggered half-open and half-closed triggered thyristor trigger module based on a single-chip microcomputer; The open-loop rectification trigger connection includes: a cross-contact trigger connection mode of the different-path bridge arms of the thyristor rectifier bridge in the full-wave full-controlled rectification module; the cross-contact of the different-path bridge arms means that the upper and lower bridge arms of the same bridge are not triggered and turned on at the same time, but the upper and lower bridge arms of different bridges are triggered and turned on at the same time.

3. The battery charging and discharging device as claimed in claim 2, It is characterized in that The single-phase full-wave fully controlled thyristor rectifier module comprises: a single-phase full-bridge rectifier bridge VT1-VT4 formed by four unidirectional thyristors VT1, VT2, VT3, and VT4 connected to each other, wherein VT1 and VT4 are the upper and lower bridge arms of one bridge respectively, and VT2 and VT3 are the upper and lower bridge arms of another bridge respectively; The single junction transistor two-tube four-terminal isolation full-wave trigger type or single junction transistor single-tube analog / digital conversion four-terminal isolation full-wave trigger type trigger module includes: first, second, third, and fourth trigger signal output terminals; wherein the first and second trigger signal output terminals can simultaneously output trigger signals to the outside during the positive half-wave cycle of the alternating current, but do not output trigger signals to the outside during the negative half-wave cycle of the alternating current; on the contrary, the third and fourth trigger signal output terminals can simultaneously output trigger signals to the outside during the negative half-wave cycle of the alternating current, but do not output trigger signals to the outside during the positive half-wave cycle of the alternating current; The cross-contact trigger connection method of the different-path bridge arms of the thyristor rectifier bridge in the full-wave fully-controlled rectifier module includes: triggering and connecting the first and second trigger signal output terminals of the trigger module to the thyristors VT1 and VT3 of the rectifier bridge VT1-VT4 respectively, and triggering and connecting the third and fourth trigger signal output terminals to the thyristors VT2 and VT4 respectively.

4. The battery charging and discharging device according to claim 1, It is characterized in that Also includes a flow stabilization module, or / and a flow limiting module; The current stabilization module comprises: a position adjustment signal output terminal; The current limiting module comprises: a position adjustment signal output terminal; The half-open and half-closed triggered thyristor trigger module comprises: a phase control node; The current stabilization module position adjustment signal output end and the current limiting module position adjustment signal output end are connected to the phase control node of the half-open and half-closed triggered thyristor trigger module; The current stabilization module includes: a preset voltage signal type current stabilization module; and when the positive and negative voltages of the battery are positive voltage, 0V, and negative voltage, the preset voltage signal type current stabilization module can still output a non-zero adjustment signal to the trigger module; the non-zero adjustment signal refers to a non-zero electrical signal or physical signal; The current limiting module comprises: a current signal feedback type current limiting module; wherein the current signal refers to a signal related to the current in the rectifier circuit; The preset voltage signal type current stabilizing module and the current signal feedback type current limiting module refer to that when the current stabilizing module or the current limiting module regulates the working state of the thyristor rectifier module and the rectifier circuit by regulating the phase of the trigger signal of the thyristor trigger module and the thyristor conduction angle, the working state of the rectifier circuit is regulated according to the following causal logic: the current stabilizing module or the current limiting module first transmits the signal related to the voltage, voltage change or current, current change in the rectifier circuit to the thyristor trigger module, thereby causing the trigger signal of the thyristor trigger module to be regulated, and then the regulated trigger signal is transmitted to the thyristor rectifier module, thereby causing the working state of the thyristor rectifier module and the rectifier circuit to be regulated; The preset voltage signal type current stabilization module or the current signal feedback type current limiting module includes a voltage signal or current signal acquisition end, and the rectifier circuit includes a voltage acquisition node or a current acquisition node, and the voltage signal or current signal acquisition end is connected or coupled to the voltage acquisition node or the current acquisition node.

5. The battery charging and discharging device as claimed in claim 4, It is characterized in that The preset voltage signal type current stabilizing module includes: a full-wave isolation mixed voltage change rate amplification analog double-plate preset voltage signal type current stabilizing module, a full-wave isolation mixed voltage change rate amplification analog single-plate preset voltage signal type current stabilizing module, a full-wave isolation mixed voltage change rate non-amplification analog double-plate preset voltage signal type current stabilizing module or a half-wave non-isolated tube pressure change rate amplification analog single-plate preset voltage signal type current stabilizing module; Or / and, the preset voltage signal type current stabilization module comprises: a current stabilization module realized by replacing the series mixed voltage or thyristor voltage collected by the voltage collection end of the above-mentioned current stabilization module with the battery voltage; The current signal feedback type current limiting module includes: a current signal feedback type current limiting module based on a current transformer.

6. The battery charging and discharging device as claimed in claim 5, It is characterized in that The current stabilization module includes a voltage acquisition and voltage division module; The voltage collection and voltage division module comprises: a voltage division output terminal; The current limiting module includes: a current signal feedback module; the current signal feedback module includes: a feedback signal voltage output terminal; The voltage-dividing output terminal of the current stabilizing module is connected to the feedback signal voltage output terminal of the current limiting module, thereby realizing the integration and connection between the current stabilizing module and the current limiting module.

7. The battery charging and discharging device according to claim 1, It is characterized in that Also includes: Switches, controllers, charging and discharging channels; The switch is arranged between the AC power output terminal and the AC power input terminal of the charging and discharging device to control the power supply of the charging and discharging device, or is arranged in the internal structure of the charging and discharging device; The charging and discharging channel is the battery charging and discharging device according to any one of claims 1 to 6; the charging and discharging channel includes a battery positive and negative pole series connection point interchange module; The control signal output end of the controller is connected to the control signal input end of the switch and the battery positive and negative pole series connection point interchange module, and the control of the switch and the battery positive and negative pole series connection point interchange module is realized by sending a control signal; A controller controls two or more switches, battery positive and negative poles series connection point interchange modules, or controls two or more charge and discharge channels at the same time; or, a switch, a battery positive and negative poles series connection point interchange module, and a charge and discharge channel are controlled by two or more controllers at the same time; Or / and, further comprising: an adjustable resistor in the charging and discharging channel, an operation panel, and a DC overcurrent and overvoltage protection device; The adjustable resistors include: phase-shift adjustable resistors, collector adjustable resistors, emitter adjustable resistors, voltage sampling and voltage division adjustable resistors, and voltage feeding output adjustable resistors; The operation panel is arranged on the outer surface of the battery charging and discharging device, and one or more of the controller and the adjustable resistor of the charging and discharging channel are arranged on the operation panel; The DC over-current and over-voltage protection device is arranged in a DC circuit in a rectifier circuit.

8. The battery charging and discharging device as claimed in claim 7, It is characterized in that The DC over-current and over-voltage protection device is arranged between the battery positive and negative pole series connection point interchange module and the battery electrodes.

9. A voltage acquisition and voltage division module, Features: The module comprises the battery charging and discharging device according to any one of claims 1 to 8; The module includes: first and second voltage acquisition ports, first, second and third resistors; The first voltage acquisition port is connected to the positive electrode or negative electrode of the battery through a first resistor, and the negative electrode or positive electrode of the battery is connected to the second voltage acquisition port through a second resistor and a third resistor in sequence; A voltage dividing node is provided between the second resistor and the third resistor; the voltage dividing node is connected to the battery charging and discharging device; The resistance values ​​of the first and second resistors are: ≥0Ω; During operation, the first and second voltage acquisition ports are respectively connected to the voltage acquisition nodes on the circuit to obtain the voltage between the two ports. The voltage is mixed and superimposed in series with the battery voltage with or without voltage reduction to form a mixed voltage, and the mixed voltage generates a divided voltage at the voltage dividing node.

10. The voltage acquisition and voltage division module as claimed in claim 9, It is characterized in that It also includes a battery positive and negative pole serial connection point interchange module; the battery positive and negative pole serial connection point interchange module includes: 2 serial input terminals and 2 serial output terminals; The connection mode of the battery positive and negative pole serial connection point interchange module in the voltage collection and voltage division module is as follows: the first voltage collection port is connected to the positive or negative pole of the battery through the first resistor, an input end of the battery positive and negative pole serial connection point interchange module, and an output end of the battery positive and negative pole serial connection point interchange module in sequence; The negative electrode or the positive electrode of the battery is connected to the second voltage collection port in sequence through another output end of the battery positive and negative electrode series connection point interchange module, another input end of the battery positive and negative electrode series connection point interchange module, a second resistor, and a third resistor; In this way, the positive or negative pole, or the negative or positive pole of the battery is connected to the first resistor and the second resistor respectively through the battery positive and negative pole series connection point interchange module; The battery positive and negative poles series connection point interchange module can interchange the positive and negative poles of the battery and connect them to the first resistor and the second resistor in reverse. Or / and, the first and second voltage acquisition ports are respectively connected to the bridge head node and the bridge tail node of the thyristor rectifier bridge in the rectifier circuit; Or / and, the voltage dividing node is connected to the feedback signal voltage output terminal of the current limiting module; Or / and, the resistor is an adjustable resistor; Or / and, a rectifier diode is arranged between the first voltage collection port, the second voltage collection port and the external circuit voltage collection point.

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