CN219107111U - Battery group parallel device - Google Patents

Battery group parallel device Download PDF

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Publication number
CN219107111U
CN219107111U CN202123174254.XU CN202123174254U CN219107111U CN 219107111 U CN219107111 U CN 219107111U CN 202123174254 U CN202123174254 U CN 202123174254U CN 219107111 U CN219107111 U CN 219107111U
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module
unit
energy storage
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王国平
卢卿
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Zhuhai Lonl Electric Co ltd
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Zhuhai Lonl Electric Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model relates to the technical field of power supply devices, and discloses a battery group parallel device which can meet different power requirements for power expansion or reduction of output and has a large application range. The utility model can output corresponding power according to the power demand of the load in the maximum power output range of the device, further can meet the load of different power demands, effectively improve the adaptability of power supply, ensure stable output of power, avoid the reduction of the output power due to the reduction of the performance of a single energy storage module, and simultaneously connect the plurality of energy storage modules in series, thereby improving the impact resistance energy of the whole device, protecting other hardware of the device, avoiding the impact of external instant heavy current and effectively improving the safety and reliability.

Description

Battery group parallel device
Technical Field
The utility model relates to the technical field of power supply devices, in particular to a battery group parallel device.
Background
The conventional battery-backup device is to form high-voltage power supply by connecting batteries in series, and if one of the batteries in the series is in a problem, the power supply of the device is interrupted and the power cannot be supplied. Taking the risk into consideration, the actual power supply time of the calculation configuration is calculated according to 1 set of battery devices, and a 1+1 mode is adopted in the actual power supply device, namely two sets of battery devices are adopted as risk backups, namely, the reserve energy is required to be increased by one time additionally; in the traditional battery device, the performances of the single batteries are inconsistent, so that a barrel effect is easily formed, namely, the battery with the worst performance in the battery pack determines the performance of the whole battery pack; when the single battery of the traditional battery device is abnormal, most of the situations need to be quickly maintained and repaired by related technicians, and the period is required to be short, but the practical requirements are difficult to meet due to the limitation of environmental conditions and reaction speed; in addition, conventional battery devices generally require custom development, and once integrated into a device, expansion is difficult to achieve in the later stage, and when the user needs are changed, the user needs cannot be responded flexibly.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the battery group parallel device provided by the utility model can stably supply power, has high reliability, can meet different power requirements for power expansion or reduction of output, and has a wide application range.
In a first aspect, a battery group parallel device according to an embodiment of the present utility model includes an output interface, a master control module, a plurality of energy storage modules, a plurality of output modules, a plurality of charging modules, and a plurality of control modules; the output interface is used for being connected with a load; the energy storage modules are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface; the input end of each output module is connected with the output end of the corresponding energy storage module, a plurality of output modules are connected in parallel to form a first total output module, and the output end of the first total output module is connected with the output interface; the output end of each charging module is respectively connected with the input end of the corresponding energy storage module, and the input end of the charging module is connected with alternating current or direct current; each control module is connected with the feedback end of the corresponding energy storage module, the control end of the charging module and the control end of the output module; the total control module is respectively in communication connection with a plurality of control modules.
The battery group parallel device according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: the output modules are connected in parallel to form the first total output module to supply power to the output interface, so that the total control module can output corresponding power according to the power requirement of the load in the maximum power output range of the device so as to meet the loads of different power requirements, the adaptability of power supply is effectively improved, stable output of power can be ensured, the output power is not reduced due to performance reduction of a single energy storage module, and meanwhile, the energy storage modules are connected in series, so that the impact energy resistance of the whole device can be improved, other hardware of the device can be protected, the impact of external instant heavy current is avoided, and the safety and reliability are effectively improved.
According to some embodiments of the utility model, the first isolation module and the second isolation module are further included; the first isolation module is arranged on a node connected with the positive end of the total energy storage module and the output interface; the second isolation module is arranged on a node, where the positive end of the first total output module is connected with the output interface.
According to some embodiments of the utility model, the charging module includes a rectifying unit, a first buck-boost unit, a first high frequency rectifying unit, and a first feedback unit: the input end of the rectifying unit is connected with the alternating current or the direct current; the input end of the first buck-boost unit is connected with the output end of the rectifying unit, and the control end of the first buck-boost unit is connected with the corresponding control module; the input end of the first high-frequency rectifying unit is connected with the output end of the first buck-boost unit, and the output end of the first high-frequency rectifying unit is connected with the input end of the corresponding energy storage module; the input end of the first feedback unit is connected with the feedback end of the first high-frequency rectification unit, and the output end of the first feedback unit is connected with the corresponding control module.
According to some embodiments of the utility model, the charging module includes a rectifying unit, a first buck-boost unit, a pulse charging and discharging unit, and a first feedback unit: the input end of the rectifying unit is connected with the alternating current or the direct current; the input end of the first buck-boost unit is connected with the output end of the rectifying unit, and the control end of the first buck-boost unit is connected with the corresponding control module; the input end of the pulse type charging and discharging unit is connected with the output end of the first voltage increasing and decreasing unit, and the output end of the pulse type charging and discharging unit is connected with the input end of the corresponding energy storage module; the input end of the first feedback unit is connected with the feedback end of the pulse type charging and discharging unit, and the output end of the first feedback unit is connected with the corresponding control module.
According to some embodiments of the utility model, the output module includes a short-circuit protection unit, a second buck-boost unit, a second high-frequency rectification unit, and a second feedback unit; the input end of the short-circuit protection unit is connected with the output end of the corresponding energy storage module; the input end of the second voltage increasing and decreasing unit is connected with the output end of the short-circuit protection unit, and the control end of the second voltage increasing and decreasing unit is connected with the corresponding control module; the input end of the second high-frequency rectification unit is connected with the output end of the second buck-boost unit, the second high-frequency rectification unit is also provided with a positive end and a negative end, and the positive end and the negative end of each output module of the second high-frequency rectification unit are respectively connected with the output interface; the input end of the second feedback unit is connected with the feedback end of the second high-frequency rectification unit, and the output end of the second feedback unit is connected with the corresponding control module.
In a second aspect, a battery group parallel device according to an embodiment of the present utility model includes an output interface, a master control module, a plurality of energy storage modules, a plurality of output modules, a plurality of charging modules, and a plurality of control modules; the output interface is used for being connected with a load; the energy storage modules are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface; the input end of each output module is connected with the output end of the corresponding energy storage module, at least two output modules are connected in series in sequence to form a second total output module, each group of the second total output modules are connected in parallel to form a third total output module, and the output end of the third total output module is connected with the output interface; the output end of each charging module is respectively connected with the input end of the corresponding energy storage module, and the input end of the charging module is connected with alternating current or direct current; each control module is connected with the feedback end of the corresponding energy storage module, the control end of the charging module and the control end of the output module; the total control module is respectively in communication connection with a plurality of control modules.
The battery group parallel device according to the embodiment of the second aspect of the present utility model has at least the following advantages: through forming first total output module to the output interface power supply after connecting the second total output module with the parallel mode, then in the biggest power output scope of device, total control module can make the device output corresponding power according to the power demand of load, and then can satisfy the load of different power demands, the adaptability of power supply has been promoted effectively, and can guarantee the stable output of power, can not reduce because of single energy storage module's performance reduces, and make output reduce, connect with the mode of establishing ties between a plurality of energy storage modules simultaneously, then can improve the impact energy that shocks resistance of whole device, other hardware of device can be protected, avoid receiving the impact of outside instantaneous heavy current, security and reliability have been promoted effectively.
According to some embodiments of the utility model, the first isolation module and the second isolation module are further included; the first isolation module is arranged on a node connected with the positive end of the total energy storage module and the output interface; the second isolation module is arranged on a node connected with the positive end of the third total output module and the output interface.
According to some embodiments of the utility model, the output module includes a short-circuit protection unit, a second buck-boost unit, a second high-frequency rectification unit, and a second feedback unit; the input end of the short-circuit protection unit is connected with the output end of the corresponding energy storage module; the input end of the second voltage increasing and decreasing unit is connected with the output end of the short-circuit protection unit, and the control end of the second voltage increasing and decreasing unit is connected with the corresponding control module; the input end of the second high-frequency rectifying unit is connected with the output end of the second buck-boost unit, and the second high-frequency rectifying unit is also provided with a positive electrode end and a negative electrode end; the input end of the second feedback unit is connected with the feedback end of the second high-frequency rectification unit, and the output end of the second feedback unit is connected with the corresponding control module; the negative electrode end of the previous second high-frequency rectifying unit in each second total output module is sequentially connected with the positive electrode end of the next second high-frequency rectifying unit, and the positive electrode end of the first second high-frequency rectifying unit in each second total output module and the negative electrode end of the last second high-frequency rectifying unit are connected in parallel to form a third total output module and then connected with the output interface.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of a battery parallel device according to a first embodiment of the first aspect of the present utility model;
fig. 2 is a schematic diagram of a battery parallel device according to a second embodiment of the first aspect of the present utility model;
fig. 3 is a schematic diagram of a specific structure of a charging module of the battery group parallel device shown in fig. 1;
fig. 4 is a schematic structural diagram of another embodiment of a charging module of the battery pack parallel device shown in fig. 1;
fig. 5 is a schematic diagram of a specific structure of an output module of the battery group parallel device shown in fig. 1;
fig. 6 is a schematic circuit specific structure diagram of a second buck-boost unit of the output module of the battery pack parallel device shown in fig. 5;
fig. 7 is a schematic diagram of a battery parallel device according to a third embodiment of the first aspect of the present utility model;
fig. 8 is a schematic diagram of a battery parallel device according to a first embodiment of the second aspect of the present utility model;
Fig. 9 is a schematic diagram of a battery parallel device according to a second embodiment of the second aspect of the present utility model;
fig. 10 is a schematic diagram of a battery group parallel device according to a second aspect of the present utility model, in which two output modules are disposed in one second total output module;
fig. 11 is a schematic diagram of a battery parallel device according to a third embodiment of the second aspect of the present utility model.
Reference numerals:
an output interface 100;
a control switch 200;
an energy storage module 300;
the output module 400, the short-circuit protection unit 410, the second buck-boost unit 420, the buck-boost conversion circuit 421, the second high-frequency rectification unit 430, the second feedback unit 440, the first total output module 401, the second total output module 402, and the third total output module 403;
the charging device comprises a charging module 500, a rectifying unit 510, a first buck-boost unit 520, a first high-frequency rectifying unit 530, a first feedback unit 540 and a pulse charging and discharging unit 550;
a control module 600;
a master control module 700;
a first isolation module 800;
and a second isolation module 900.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of first, second, etc. if provided for the purpose of distinguishing between technical features only, should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1, a battery group parallel device according to an embodiment of the first aspect of the present utility model includes an output interface 100, a total control module 700, a plurality of energy storage modules 300, a plurality of output modules 400, a plurality of charging modules 500, and a plurality of control modules 600; the output interface 100 is used for connecting with a load; the plurality of energy storage modules 300 are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface 100; the input end of each output module 400 is connected with the output end of the corresponding energy storage module 300, and a plurality of output modules 400 are connected in parallel to form a first total output module 401, and the output end of the first total output module 401 is connected with the output interface 100; the output end of each charging module 500 is respectively connected with the input end of the corresponding energy storage module 300, and the input end of each charging module 500 is connected with alternating current or direct current; each control module 600 is connected with the feedback end of the corresponding energy storage module 300, the control end of the charging module 500 and the control end of the output module 400; the overall control module 700 is communicatively coupled to a plurality of control modules 600, respectively.
It should be noted that, the output interface 100 may be a specific interface hardware, which functions as: after the connection in the above manner, the output ends of the plurality of energy storage modules 300 and the output end of the first total output module 401 after being connected in series are output as the same node, that is, the positive end of the plurality of energy storage modules 300 after being connected with the positive end of the first total output module 401 is connected to a load, and the negative end of the plurality of energy storage modules 300 after being connected with the negative end of the first total output module 401 is connected to the load; it is also conceivable that in the practical application process, the output interface 100 may be connected to the corresponding load by directly connecting the output interface 100 to the corresponding load through a wire or a lead, without using interface hardware.
Working principle: as shown in fig. 1, since the output modules 400 are connected in parallel to the output interface 100, assuming that the output modules 400 are provided with n total output modules, the maximum power output by each output module 400 is P, and the powers of the n output modules 400 can be P respectively 1 、P 2 、P 3 、P 4 ……P n-2 、P n-1 、P n The method comprises the steps of carrying out a first treatment on the surface of the The maximum output power of the whole device is determined to be P according to the parallel rule 1 +P 2 +P 3 +P 4 ……P n-2 +P n-1 +P n Therefore, the device can select proper power value to output according to the load and the power range thereof, effectively enlarge the adaptive range and limit the negative when connecting the loadThe power demand of the load is smaller than the total output power of the device, when any one of the output modules 400 on other branches is abnormal, the whole device can also meet the demand of the load power so as to ensure that the device can work normally, at the moment, the abnormal module can be maintained or replaced, the maintenance or replacement without power failure can be realized, and the reliability and the safety are effectively improved; meanwhile, the output ends of the energy storage modules 300 are connected in series, so that the impact resistance of the whole to high current can be improved, other hardware of the device is protected, the impact of external instant high current is avoided, and the safety or reliability is effectively improved.
Referring to fig. 2, in some embodiments of the present utility model, an output interface 100, a control switch 200, a general control module 700, a plurality of energy storage modules 300, a plurality of output modules 400, a plurality of charging modules 500, and a plurality of control modules 600 are included; the output interface 100 is used for connecting with a load; the plurality of energy storage modules 300 are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface 100 after passing through the control switch 200; the input end of each output module 400 is connected with the output end of the corresponding energy storage module 300, and a plurality of output modules 400 are connected in parallel to form a first total output module 401, and the output end of the first total output module 401 is connected with the output interface 100; the output end of each charging module 500 is respectively connected with the input end of the corresponding energy storage module 300, and the input end of each charging module 500 is connected with alternating current or direct current; each control module 600 is connected with the feedback end of the corresponding energy storage module 300, the control end of the charging module 500 and the control end of the output module 400; the total control module 700 is connected with the control end of the control switch 200 and is respectively connected with a plurality of control modules 600 in a communication way; also included are a first isolation module 800 and a second isolation module 900; the first isolation module 800 is arranged on a node connected with the output interface 100 and the positive end of the total energy storage module; the second isolation module 900 is disposed on a node where the positive terminal of the first total output module 401 is connected to the output interface 100. The first isolation module 800 is provided, so that current backflow can be avoided, and it is ensured that the positive ends of the plurality of energy storage modules 300 connected in series can only output current to the output interface 100, and the second isolation module 900 can ensure that the positive end of the first total output module 401 can only output current to the output interface 100, so that safety and reliability are effectively improved. And when any energy storage module 300 is abnormal, the control switch 200 is matched with the energy storage module, so that the loop between the total energy storage module and the output interface 100 can be cut off in time, and the whole device can be ensured to be powered normally.
In some embodiments of the present utility model, the first isolation module 800 and the second isolation module 900 may use related semiconductors such as diodes or MOS transistors, and in cooperation with corresponding peripheral circuits, it is ensured that current can only be output in one direction, where in this embodiment, the first isolation module 800 and the second isolation module 900 all use diodes, so long as the anode terminals of the corresponding modules are connected to the anodes of the diodes, the anodes of the diodes are connected to the output interface 100, so that current backflow prevention can be achieved, and other circuit structures capable of achieving current backflow prevention belong to conventional technical means of those skilled in the art, and will not be described in excessive detail herein.
In some embodiments of the present utility model, the energy storage module 300 is in a battery structure, that is, the single energy storage module 300 may be at least one battery, and when there are at least two batteries, the energy storage module 300 may be connected in series or in parallel, and in the present utility model, a storage battery capable of performing repeated charging and discharging is used as the energy storage module 300.
Referring to fig. 3, in some embodiments of the present utility model, the charging module 500 may employ an AC/DC or DC/DC circuit to change AC/DC inputs of different voltage levels into DC power of a voltage acceptable to the energy storage module 300 to achieve charging of the energy storage module 300. Specifically, the charging module 500 includes a rectifying unit 510, a first buck-boost unit 520, a first high-frequency rectifying unit 530, and a first feedback unit 540: the input end of the rectifying unit 510 is connected with alternating current or direct current; the input end of the first buck-boost unit 520 is connected with the output end of the rectifying unit 510, and the control end of the first buck-boost unit 520 is connected with the corresponding control module 600; the input end of the first high-frequency rectification unit 530 is connected with the output end of the first buck-boost unit 520, and the output end of the first high-frequency rectification unit 530 is connected with the input end of the corresponding energy storage module 300; the input end of the first feedback unit 540 is connected to the feedback end of the first high-frequency rectifying unit 530, and the output end of the first feedback unit 540 is connected to the corresponding control module 600. The input end of the rectifying unit 510 is connected to the output end of the ac or dc power supply, and the first feedback unit 540 is configured to feed back parameters such as current and voltage output by the charging module 500 to the corresponding control module 600, and then the parameters are transmitted to the overall control module 700 by the control module 600.
The rectifying unit 510 employs a full-bridge rectifying circuit or a half-bridge rectifying circuit. The ac or dc power supply is changed into a dc input that can be received by the energy storage module 300 through the rectifying unit 510, and then is subjected to a step-up and step-down process through the first step-up and step-down unit 520, so that the voltage of the dc input can also meet the requirement of the energy storage module 300. The first buck-boost unit 520 includes a high frequency switching tube and a high frequency transformer, wherein the high frequency switching tube adopts a MOS tube or an IGBT tube, and the high frequency transformer is used for performing a step-up or step-down process on the output of the rectifying unit 510. The control module 600 may control the trigger pulse, which is used to control the on and off of the high-frequency switching tube to form the high-frequency alternating current. Finally, the first high-frequency rectification unit 530 converts the first high-frequency rectification signal into direct current which meets the requirements of the energy storage module 300. Parameters such as voltage and current of the dc output of the charging module 500 are fed back to the corresponding control module 600 through the first feedback unit 540.
For example, the first feedback unit 540 may be understood as a voltage and current acquisition module, that is, the first feedback unit 540 may transmit the acquired voltage and current information to the corresponding control module 600 by using a voltage acquisition circuit structure and a current acquisition circuit structure that are conventionally adopted by those skilled in the art.
The charge current limit value and the charge voltage limit value of the charge module 500 may be set in the overall control module 700, wherein the charge current limit value and the charge voltage limit value are set to enable the energy storage module 300 to operate in an optimal state. For example, if the energy storage module 300 includes a 12V/100AH lead-acid battery, the charging voltage limit value of the charging module 500 is 14.2V, and the charging current limit value is 10A, that is, the charging voltage may be less than or equal to 14.2V, and the current may be less than or equal to 10A. When the voltage value of the energy storage module 300 is lower than the voltage limit value of the charging voltage, the energy storage module 300 is in a constant-current or constant-voltage charging state until the energy storage module 300 is full, so that the phenomenon of undercharging can be effectively reduced. When the voltage value of the energy storage module 300 is higher than the charging voltage limit value, the overall control module 700 controls the charging module 500 to stop working, so as to avoid damaging the energy storage module 300 due to overcharge.
The input end of the charging module 500 can receive ac or dc input with different voltage levels, and the ac or dc input is converted into dc that can be stored in the energy storage module 300 through the rectifying unit 510, the first buck-boost unit 520 and the first high-frequency rectifying unit 530 and stored in the energy storage module 300. And under the control of the overall control module 700 and the control module 600, the energy storage module 300 and the input voltage can be monitored, and the overcharge or undercharge can be effectively avoided.
Referring to fig. 4, in some embodiments of the present utility model, the charging module 500 includes a rectifying unit 510, a first buck-boost unit 520, a pulse charging and discharging unit 550, and a first feedback unit 540: the input end of the rectifying unit 510 is connected with alternating current or direct current; the input end of the first buck-boost unit 520 is connected with the output end of the rectifying unit 510, and the control end of the first buck-boost unit 520 is connected with the corresponding control module 600; the input end of the pulse type charge-discharge unit 550 is connected with the output end of the first buck-boost unit 520, and the output end of the pulse type charge-discharge unit 550 is connected with the input end of the corresponding energy storage module 300; the input end of the first feedback unit 540 is connected to the feedback end of the pulse charge/discharge unit 550, and the output end of the first feedback unit 540 is connected to the corresponding control module 600.
The ac or dc power supply is changed into a dc input that can be received by the energy storage module 300 through the rectifying unit 510, then is subjected to step-up and step-down processing through the first step-up and step-down unit 520, and finally, the energy storage module 300 is subjected to activation processing through the pulse charge and discharge circuit module. It can be appreciated that when the health of the energy storage module 300 is sub-health, the smart battery performs active maintenance, and the storage battery in the energy storage module 300 is activated by the pulse charging and discharging unit 550, so that the energy storage module 300 is healthier. It should be noted that the pulse charge-discharge activation parameters of the charging module 500 may be configured by the overall control module 700.
The pulse charging and discharging unit 550 provides a self-maintenance function for the smart battery, i.e. the self-maintenance function is started when the health of the energy storage module 300 is in a sub-health state. The ac or dc input enters the energy storage module 300 through the rectifying unit 510, the first step-up/step-down unit 520, and the pulse type charging/discharging unit 550, and the energy storage module 300 can be activated under the action of the pulse type charging/discharging unit 550, even if the energy storage module 300 is healthier. The overall control module 700 and the corresponding control module 600 monitor the health condition of the energy storage module 300, and stop the operation of the pulse charge and discharge unit 550 when the energy storage module 300 is monitored to be healthier, so that the multiple times of utilization of the storage battery in the energy storage module 300 can be effectively realized, and the waste of the storage battery is reduced.
For example, the pulse charging and discharging unit 550 includes a pulse charging circuit and a pulse discharging circuit for activating the energy storage unit, and activation may be understood as a deep charging and discharging process performed on the energy storage unit. The pulse charging circuit charges the energy storage module 300, and the pulse discharging circuit discharges the energy storage module 300. If the pulse charging circuit adopts an NE555 chip as a pulse generator, the pulse discharging circuit can realize discharging in a manner that the RC discharging circuit is connected with a switch controlled by the pulse, so that the energy storage module 300 is circularly charged and discharged, and the activation effect is achieved.
Referring to fig. 5, in some embodiments of the present utility model, the output module 400 includes a short-circuit protection unit 410, a second buck-boost unit 420, a second high-frequency rectification unit 430, and a second feedback unit 440; the input end of the short-circuit protection unit 410 is connected with the output end of the corresponding energy storage module 300; the input end of the second buck-boost unit 420 is connected with the output end of the short-circuit protection unit 410, and the control end of the second buck-boost unit 420 is connected with the corresponding control module 600; the input end of the second high-frequency rectification unit 430 is connected with the output end of the second buck-boost unit 420, the second high-frequency rectification unit 430 also has a positive end and a negative end, and the positive end and the negative end of the second high-frequency rectification unit 430 of each output module 400 are respectively connected with the output interface 100; the input end of the second feedback unit 440 is connected to the feedback end of the second high frequency rectification unit 430, and the output end of the second feedback unit 440 is connected to the corresponding control module 600.
The direct current flowing out from the energy storage module 300 passes through the short-circuit protection unit 410 and then passes through the second voltage increasing and decreasing unit 420 to be increased and decreased, the control module 600 controls the giving of the trigger pulse, finally, the direct current meeting the load requirement is output through the second high-frequency rectifying unit 430, and the direct current is output to the second feedback unit 440 to collect the voltage and current parameters of the output direct current and feed back the voltage and current parameters to the corresponding control module 600. It should be noted that, the short-circuit protection unit 410 may use a fuse or a circuit breaker to protect, and in case of a short circuit, the fuse or the circuit breaker may be triggered to stop the operation of the output module 400, so as to avoid damage to the energy storage module 300; the second buck-boost unit 420 includes a high frequency switching tube using a MOS tube or an IGBT tube, and a high frequency transformer for boosting or stepping down the output of the short protection unit 410.
The second feedback unit 440 may have a dc current sampling circuit structure or a dc voltage sampling circuit structure to detect the current or voltage of the dc output from the second high frequency rectifying unit 430 and transmit the detection result to the corresponding control module 600.
Parameters such as an output current limiting protection value, a low voltage protection value, etc. of the output module 400 may be set in the overall control module 700, and the output current limiting protection value and the low voltage protection value are parameters that enable the energy storage module 300 to be in an optimal operation state. For example, the energy storage module 300 includes a 12V/100AH lead acid battery, and the low voltage protection value upon discharge is 10.8V. When the total control module 700 controls the output module 400 to work, the energy storage module 300 is in a discharging state, and the operation is stopped until the output voltage of the energy storage module 300 is reduced to a low-voltage protection value, namely, the voltage value of the energy storage module 300 collected by the total control module 700 is smaller than or equal to 10.8V, the output module 400 is controlled to stop working, and the damage to the energy storage module 300 caused by overdischarge is avoided.
The output module 400 can convert the direct current output by the energy storage module 300 into direct current with different voltage levels for outputting, so as to meet the requirements of users. The output module 400 for outputting the direct current converts the direct current output from the energy storage module 300 into the direct current meeting the user's requirement through the short-circuit protection circuit, the second buck-boost unit 420 and the second high frequency rectification unit 430. And under the control of the overall control module 700 and the control module 600, the energy storage module 300 and the output voltage can be monitored, and the damage to the energy storage module 300 caused by overdischarge can be effectively avoided.
Referring to fig. 6, in some embodiments of the present utility model, each of the first buck-boost unit 520 and the second buck-boost unit 420 includes a plurality of buck-boost conversion circuits 421, where the plurality of buck-boost conversion circuits 421 are disposed in parallel, it is understood that the corresponding control module 600 gives a PWM control signal, and the PWM control signal is used as a trigger pulse to control the buck-boost conversion circuits 421 to perform buck-boost processing, and finally, the filtering processing is performed.
Specifically, the buck-boost converting circuit 421 includes a first field effect transistor, a second field effect transistor, a filter capacitor and a transformer, wherein a trigger pulse enters the buck-boost converting circuit 421 from the gates of the first field effect transistor and the second field effect transistor, for example, the trigger pulse output by the corresponding control module 600 enters the gates of the first field effect transistor and the second field effect transistor of the buck-boost converting circuit 421 in the first buck-boost unit 520; the trigger pulse output by the corresponding control module 600 enters the gates of the first field effect transistor and the second field effect transistor of the buck-boost conversion circuit 421 in the second buck-boost unit 420. The sources of the first field effect tube and the second field effect tube are grounded, and the drains of the first field effect tube and the second field effect tube are connected with the transformer. It can be understood that the transformer adopts three windings, the first end of the first winding is connected with the drain electrode of the first field effect transistor, the second end of the first winding is connected with the anode end of the filter capacitor, the first end of the second winding is connected with the drain electrode of the second field effect transistor, the second end of the second winding is connected with the anode end of the filter capacitor, and the third windings of the transformers of the buck-boost conversion circuits 421 are connected in series.
Three buck-boost converting circuits 421, such as a first buck-boost converting circuit 421, a second buck-boost converting circuit 421 and a third buck-boost converting circuit 421, are adopted, the third windings of the transformers are sequentially connected in series, the third windings of the transformers of the first buck-boost converting circuit 421 are connected with a plurality of parallel capacitors and then are connected with the first input end of the bridge rectifier circuit, and the second end of the third windings of the transformers of the third buck-boost converting circuit 421 are connected with the second input end of the bridge rectifier circuit. The anode terminal of the filter capacitor is connected to the output terminal of other modules, for example, in the first buck-boost unit 520, the anode terminal of the filter capacitor in the buck-boost conversion circuit 421 is connected to the output terminal of the corresponding rectifying unit 510; in the second buck-boost unit 420, the anode terminal of the filter capacitor in the buck-boost conversion circuit 421 is connected to the output terminal of the short-circuit protection unit 410.
The PWM signals control the buck-boost converting circuits 421 to accurately control the output current and voltage, and the buck-boost converting circuits 421 are connected in parallel, so that the loss of the circuit during high-current operation is reduced, and the reliability of the circuit is improved.
In some embodiments of the present utility model, the control module 600 includes a PWM control chip, a first output end of the PWM control chip on the corresponding control module 600 is connected to the first buck-boost unit 520, and a second output end of the PWM control chip on the control module 600 is connected to the second buck-boost unit 420. The PWM control chip may employ a UC2525 chip. The corresponding control module 600 is also provided with an auxiliary control circuit, and the auxiliary control circuit can adopt a singlechip to form intelligent management control, so that the working control process of the circuit is safer and more reliable. The corresponding control module 600 and the control module 600 can make the buck-boost converting circuits 421 work with the same frequency, the same phase and the same pulse width, so that the current and the voltage output by the buck-boost converting circuits 421 are the same, and the stability and the reliability of the device work are improved.
In some embodiments of the present utility model, the control switch 200 may use a contactor, a relay magnet, a latching relay, etc. as an automatic switch, and then the control end of the control switch 200 is connected to the overall control module 700, and is controlled by the overall control module 700, or may use a manual switch mode, and the overall control module 700 sends out a warning signal to remind a worker to perform manual switching off or switching on.
In the following, a specific embodiment is shown in fig. 7, to further describe the embodiment of the first aspect of the present utility model, in this embodiment, one total control module 700, output interface 100, first isolation module 800, second isolation module 900 and control switch 200 are respectively provided, and 5 total output modules 400 are respectively provided, that is, 5 total output modules 400 are formed in parallel, one first total output module 401 is formed by 5 total output modules 400, in this embodiment, the maximum power of 5 output modules 400 is Pa, then the output power of the device is between 0 Pa and 5Pa, then in the actual application process, the output power of the device of the present utility model can be adjusted between 0 Pa and 5Pa according to the power requirement of the load, if the current load requirement is 3Pa, the output power of the whole device is 3Pa, if any one of the output modules 400 in operation is abnormal, the maximum output power of the remaining 4 output modules 400 is 4Pa, and still can satisfy the load requirement of 3Pa, at this time, the current can be detected by the control module, at this moment, the current can be stopped by the control module in the input interface 300, if any one of the output modules is abnormal, and the current can be stopped in the external connection, if any one of the energy storage modules 300 is abnormal, and the current can be detected, and the current can be stopped in the external connection, and the current can be detected, and the abnormal current can be outputted by the output modules 300, and the current can be stopped.
The battery group parallel device according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: through forming first total output module 401 to the power supply of output interface 100 after connecting output module 400 in parallel, then in the biggest power output scope of device, total control module 700 can make the device output corresponding power according to the power demand of load to satisfy the load of different power demands, the adaptability of power supply has been promoted effectively, and can guarantee the stable output of power, can not reduce because of the performance of single energy storage module 300 reduces, and make output reduce, connect in series between a plurality of energy storage modules 300 simultaneously, then can improve the impact energy of whole device, other hardware of device can be protected, avoid receiving the impact of outside instantaneous heavy current, security and reliability have been promoted effectively.
Referring to fig. 8, in a second aspect, a battery group parallel device according to an embodiment of the present utility model includes an output interface 100, a total control module 700, a plurality of energy storage modules 300, a plurality of output modules 400, a plurality of charging modules 500, and a plurality of control modules 600; the output interface 100 is used for connecting with a load; the plurality of energy storage modules 300 are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface 100; the input end of each output module 400 is connected with the output end of the corresponding energy storage module 300, at least two output modules 400 are formed into a group of second total output modules 402 after being sequentially connected in series, each group of second total output modules 402 is connected in parallel to form a third total output module 403, and the output end of the third total output module 403 is connected with the output interface 100; the output end of each charging module 500 is respectively connected with the input end of the corresponding energy storage module 300, and the input end of each charging module 500 is connected with alternating current or direct current; each control module 600 is connected with the feedback end of the corresponding energy storage module 300, the control end of the charging module 500 and the control end of the output module 400; the overall control module 700 is communicatively coupled to a plurality of control modules 600, respectively.
It should be noted that, the output interface 100 may be a specific interface hardware, which functions as: after the connection in the above manner, the output ends of the plurality of energy storage modules 300 and the output end of the third total output module 403 after being connected in series are output as the same node, that is, the positive end of the plurality of energy storage modules 300 after being connected in series is connected to the positive end of the third total output module 403 and then connected to the load, and the negative end of the plurality of energy storage modules 300 after being connected in series is connected to the negative end of the third total output module 403 and then connected to the load; it is also conceivable that in the practical application process, the output interface 100 may be connected to the corresponding load by directly connecting the output interface 100 to the corresponding load through a wire or a lead, without using interface hardware.
Working principle: as shown in fig. 8, since the second total output modules 402 are connected in parallel to the output interface 100, assuming that n total output modules 402 are provided, the maximum power output by each second total output module 402 is P, and the powers of the n total output modules 402 may be P respectively 1 、P 2 、P 3 、P 4 ……P n-2 、P n-1 、P n The method comprises the steps of carrying out a first treatment on the surface of the The maximum output power of the whole device is determined to be P according to the parallel rule 1 +P 2 +P 3 +P 4 ……P n-2 +P n-1 +P n Therefore, the device can select a proper power value to output according to the load and the power range thereof, the adaptive range can be effectively enlarged, when the load is connected, the power requirement of the load can be limited to be smaller than the total output power of the device, when any one of the output modules 400 in the second total output modules 402 on other branches is abnormal, the whole device can also meet the requirement of the load power, so that the device can work normally, at the moment, the abnormal module can be maintained or replaced, uninterrupted maintenance or replacement can be realized, and the reliability and safety are effectively improved; meanwhile, the output ends of the energy storage modules 300 are connected in series, so that the impact resistance of the whole to high current can be improved, other hardware of the device is protected, the impact of external instant high current is avoided, and the safety and reliability are effectively improved; unlike the first embodiment, the second total output module 402 is output after being connected in series by at least two output modules 400, so the second total output module total voltage is a value obtained by accumulating the voltage values of each output module 400.
Referring to fig. 9, in some embodiments of the present utility model, an output interface 100, a control switch 200, a general control module 700, a plurality of energy storage modules 300, a plurality of output modules 400, a plurality of charging modules 500, and a plurality of control modules 600 are included; the output interface 100 is used for connecting with a load; the plurality of energy storage modules 300 are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface 100 after passing through the control switch 200; the input end of each output module 400 is connected with the output end of the corresponding energy storage module 300, at least two output modules 400 are formed into a group of second total output modules 402 after being sequentially connected in series, each group of second total output modules 402 is connected in parallel to form a third total output module 403, and the output end of the third total output module 403 is connected with the output interface 100; the output end of each charging module 500 is respectively connected with the input end of the corresponding energy storage module 300, and the input end of each charging module 500 is connected with alternating current or direct current; each control module 600 is connected with the feedback end of the corresponding energy storage module 300, the control end of the charging module 500 and the control end of the output module 400; the total control module 700 is connected with the control end of the control switch 200 and is respectively connected with a plurality of control modules 600 in a communication way; also included are a first isolation module 800 and a second isolation module 900; the first isolation module 800 is arranged on a node connected with the output interface 100 and the positive end of the total energy storage module; the second isolation module 900 is disposed on a node connected to the output interface 100 and the positive terminal of the third total output module 403. And when any energy storage module 300 is abnormal, the control switch 200 is matched with the energy storage module, so that the loop between the total energy storage module and the output interface 100 can be cut off in time, and the whole device can be ensured to be powered normally.
In some embodiments of the present utility model, the charging module 500, the energy storage module 300, the overall control module 700, the control module 600, and the control module 600 may all adopt the structure as mentioned in the embodiment of the first aspect of the present utility model.
Referring to fig. 10, in some embodiments of the present utility model, the output module 400 includes a short-circuit protection unit 410, a second buck-boost unit 420, a second high-frequency rectification unit 430, and a second feedback unit 440; the input end of the short-circuit protection unit 410 is connected with the output end of the corresponding energy storage module 300; the input end of the second buck-boost unit 420 is connected with the output end of the short-circuit protection unit 410, and the control end of the second buck-boost unit 420 is connected with the corresponding control module 600; the input end of the second high-frequency rectification unit 430 is connected with the output end of the second buck-boost unit 420, and the second high-frequency rectification unit 430 also has a positive electrode end and a negative electrode end; the input end of the second feedback unit 440 is connected with the feedback end of the second high-frequency rectification unit 430, and the output end of the second feedback unit 440 is connected with the corresponding control module 600; the negative terminal of the previous second high-frequency rectification unit 430 in each second total output module 402 is sequentially connected with the positive terminal of the next second high-frequency rectification unit 430, and the positive terminal of the first second high-frequency rectification unit 430 and the negative terminal of the last second high-frequency rectification unit 430 in each second total output module 402 are connected in parallel to form a third total output module 403 and then connected with the output interface 100. As shown in fig. 10, the second total output module 402 is output after being connected in series by the output ports of the second high-frequency rectification units 430 corresponding to the two output modules 400.
In the following, a specific embodiment, as shown in fig. 11, is used to further describe the embodiment of the first aspect of the present utility model, in this embodiment, one total control module 700, output interface 100, first isolation module 800, second isolation module 900 and control switch 200 are respectively provided, and 6 control modules 600, charging module 500, energy storage module 300 and output module 400 are respectively provided, where each two output modules 400 are connected in series to form a second total output module 402, that is, a total of 3 second total output modules 402 form a third total output module 403 by parallel connection to output power, in this embodiment, the maximum power of 6 output modules 400 is Pa, then the output power of each second total output module 402 is 2Pa, and then the output power of the device is between 0 Pa and 6Pa, the voltage value of each second total output module 402 is the voltage value of two output modules 400, so that in the actual application process, the output power of the device can be adjusted between 0 Pa and 6Pa according to the power requirement of the load, if the current load requirement is 4Pa, the output power of the whole device is 4Pa, when any one of the output modules 400 in the working second total output module 402 is abnormal, the maximum power of the remaining two second total output modules 402 is still 4Pa, the requirement of the load power can still be met, at this time, the corresponding output modules 400 in the second total output modules 402 which are disabled due to the abnormality can be overhauled synchronously, in addition, because the 6 energy storage modules 300 are connected in series, the impact resistance effect can be achieved on the external current, other hardware in the device can be protected, in the actual application process, if any one of the energy storage modules 300 is detected to be abnormal, the control switch 200 may be turned off, and at this time, the energy storage module 300 may be overhauled, and at this time, the output interface 100 may only receive the current output of the output module 400.
The battery group parallel device according to the embodiment of the second aspect of the present utility model has at least the following advantages: through forming first total output module 401 to the power supply of output interface 100 after connecting second total output module 402 with the parallel mode, then in the biggest power output scope of device, total control module 700 can make the device output corresponding power according to the power demand of load, effectively promoted the adaptability of supplying power, and can guarantee the stable output of power, can not reduce because of the performance reduction of single energy storage module 300, and make output reduce, simultaneously connect with the mode of establishing ties between a plurality of energy storage modules 300, then can improve the impact energy that shocks resistance of whole device, other hardware of device can be protected, avoid receiving the impact of outside instantaneous heavy current, security and reliability have been promoted effectively.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A battery pack parallel device, comprising:
the output interface is used for being connected with a load;
the energy storage modules are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface;
the input end of each output module is connected with the output end of the corresponding energy storage module, the output modules are connected in parallel to form a first total output module, and the output end of the first total output module is connected with the output interface;
the output end of each charging module is connected with the input end of the corresponding energy storage module respectively, and the input end of the charging module is connected with alternating current or direct current;
each control module is connected with the feedback end of the corresponding energy storage module, the control end of the charging module and the control end of the output module;
And the total control module is respectively in communication connection with the plurality of control modules.
2. The battery pack shunt device according to claim 1, further comprising:
the first isolation module is arranged on a node connected with the positive end of the total energy storage module and the output interface;
and the second isolation module is arranged on a node, connected with the output interface, of the positive end of the first total output module.
3. The battery pack shunt device according to claim 1, wherein the charging module comprises:
the input end of the rectifying unit is connected with the alternating current or the direct current;
the input end of the first lifting unit is connected with the output end of the rectifying unit, and the control end of the first lifting unit is connected with the corresponding control module;
the input end of the first high-frequency rectifying unit is connected with the output end of the first buck-boost unit, and the output end of the first high-frequency rectifying unit is connected with the input end of the corresponding energy storage module;
the input end of the first feedback unit is connected with the feedback end of the first high-frequency rectifying unit, and the output end of the first feedback unit is connected with the corresponding control module.
4. The battery pack shunt device according to claim 1, wherein the charging module comprises:
the input end of the rectifying unit is connected with the alternating current or the direct current;
the input end of the first lifting unit is connected with the output end of the rectifying unit, and the control end of the first lifting unit is connected with the corresponding control module;
the input end of the pulse type charging and discharging unit is connected with the output end of the first voltage increasing and decreasing unit, and the output end of the pulse type charging and discharging unit is connected with the input end of the corresponding energy storage module;
the input end of the first feedback unit is connected with the feedback end of the pulse type charging and discharging unit, and the output end of the first feedback unit is connected with the corresponding control module.
5. The battery pack shunt device according to claim 1, wherein the output module comprises:
the input end of the short-circuit protection unit is connected with the output end of the corresponding energy storage module;
the input end of the second lifting unit is connected with the output end of the short-circuit protection unit, and the control end of the second lifting unit is connected with the corresponding control module;
The input end of the second high-frequency rectification unit is connected with the output end of the second buck-boost unit, the second high-frequency rectification unit is also provided with a positive end and a negative end, and each output module is respectively connected with the positive end and the negative end of the second high-frequency rectification unit;
the input end of the second feedback unit is connected with the feedback end of the second high-frequency rectifying unit, and the output end of the second feedback unit is connected with the corresponding control module.
6. A battery pack parallel device, comprising:
the output interface is used for being connected with a load;
the energy storage modules are sequentially connected in series to form a total energy storage module, and the output end of the total energy storage module is connected with the output interface;
the input end of each output module is connected with the output end of the corresponding energy storage module, at least two output modules are connected in series in sequence to form a second total output module, each group of second total output modules are connected in parallel to form a third total output module, and the output end of the third total output module is connected with the output interface;
The output end of each charging module is connected with the input end of the corresponding energy storage module respectively, and the input end of the charging module is connected with alternating current or direct current;
each control module is connected with the feedback end of the corresponding energy storage module, the control end of the charging module and the control end of the output module;
and the total control module is respectively in communication connection with the plurality of control modules.
7. The battery pack shunt device according to claim 6, further comprising:
the first isolation module is arranged on a node connected with the positive end of the total energy storage module and the output interface;
and the second isolation module is arranged on a node connected with the positive end of the third total output module and the output interface.
8. The battery pack shunt device according to claim 6, wherein the output module comprises:
the input end of the short-circuit protection unit is connected with the output end of the corresponding energy storage module;
the input end of the second lifting unit is connected with the output end of the short-circuit protection unit, and the control end of the second lifting unit is connected with the corresponding control module;
The input end of the second high-frequency rectifying unit is connected with the output end of the second buck-boost unit, and the second high-frequency rectifying unit is also provided with a positive electrode end and a negative electrode end;
the input end of the second feedback unit is connected with the feedback end of the second high-frequency rectification unit, and the output end of the second feedback unit is connected with the corresponding control module;
the negative electrode end of the previous second high-frequency rectifying unit in each second total output module is sequentially connected with the positive electrode end of the next second high-frequency rectifying unit, and the positive electrode end of the first second high-frequency rectifying unit in each second total output module and the negative electrode end of the last second high-frequency rectifying unit are connected in parallel to form a third total output module and then connected with the output interface.
CN202123174254.XU 2021-12-15 2021-12-15 Battery group parallel device Active CN219107111U (en)

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