CN216981547U

CN216981547U - Lithium battery equalizing charge module capable of being freely combined and independently managed by single string

Info

Publication number: CN216981547U
Application number: CN202123267120.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-07-15
Anticipated expiration: 2031-12-23

Abstract

But lithium battery equalizing charge module of independent management of single cluster of independent combination, including the public groove of shell structure and the female groove of shell structure of the concatenation assembly of being convenient for, constitute including the charge-discharge monitoring unit, wherein the charge-discharge monitoring unit still includes: the device comprises a charging control module, a charging delay reset module, a battery voltage monitoring module, an overcharge cut-off module, an overcharge signal latch module, an overcharge indication module, an overcharge signal sending module, an overdischarge signal latch module, an overdischarge indication module and an overdischarge signal sending module. The capacity of a multi-module set cooperative management battery can be freely combined in series by using a special circuit structure and a shell structure according to the function of increasing or decreasing the number of lithium battery cores; the lithium battery equalizing charge module can freely combine different types (different charging and discharging voltages) of lithium battery equalizing charge modules into a series-parallel battery pack according to the requirements of the lithium battery core, the required total output voltage is obtained, the equalizing effect is not influenced, and the use is convenient.

Description

Lithium battery equalizing charge module capable of being freely combined and independently managed by single string

Technical Field

The invention relates to the technical field of lithium battery equalizing charge, in particular to a lithium battery equalizing charge module which can independently manage a string of lithium battery cores by a single module which can be freely combined according to the number of lithium battery cores which are connected in series. Specifically, by utilizing an external power supply, one equalizing charge module is correspondingly connected with a string of lithium battery cores, and the equalizing charge module which is automatically controlled to charge and manage the corresponding single string of lithium battery cores can be independently completed, so that the aim of uniformly charging the whole group of lithium battery cores which are connected in series to be equalized to full-charge voltage is achieved, and meanwhile, the equalizing charge module which is full of electricity firstly and is discharged firstly can be memorized and displayed.

Background

In the existing lithium battery protection board, due to the limitation of the balancing technology, a resistance discharge passive balancing technology is adopted, or an active balancing technology of high voltage to low voltage energy transfer in a capacitive energy storage charging and discharging mode is adopted, or an active balancing technology of one-by-one energy transfer of adjacent lithium batteries in an inductive energy storage charging and discharging mode is adopted.

When the balancing technology is used for balancing, in the process of charging a single-string lithium battery core with smaller actual capacity, the lithium battery core with smaller actual capacity reaches a low-voltage protection threshold value firstly when discharging, and discharges because the voltage rises faster when charging so as to cause the lithium battery core to discharge with inconsistent voltage of other lithium battery cores, so that the voltage is reduced, and the balancing technology waits for the voltage of other lithium battery cores to catch up, so that the balancing mode that the lithium battery core with smaller actual capacity is discharged and reduced firstly has unreasonable phenomenon when being designed; in addition, the discharge process is required in the equalization process, so that the overall output voltage of the battery pack is influenced; the active equalization technology has the advantages that discontinuous equalization current is input to a single-string lithium battery core, the efficiency is low, the average current is small, and the equalization capacity is poor; the passive equalization technology can be realized only by depending on the charging current of the whole group of batteries, the charging time is controlled by an overcharge protection circuit, and when one string of lithium battery cores reaches an overcharge protection voltage threshold value, a protection board is disconnected to limit continuous charging, so that the equalization charging time is short, the equalization current is small, and the equalization capacity is poor; when the lithium battery pack with reduced handling capacity returns to a factory for detection, the position of the specific small-capacity lithium battery cell can be judged only by the special equipment through the charging and discharging processes, so that inconvenience is brought to maintenance.

In order to solve the above problems, people are always looking for new solutions.

Disclosure of Invention

The invention aims to overcome the defects of the existing lithium battery equalization technology, and provides a novel equalization technology, which is more reasonable in equalization mode, higher in equalization efficiency, stronger in operability and more convenient to assemble. The equalization logic is: the balancing technology that a certain string or a plurality of strings of lithium battery cores are fully charged firstly and then maintain full-charge voltage can wait for other lithium battery cores to be fully charged subsequently; the technology solves the problems that an unfixed multithreading form can be realized without discharging, the charging current is continuously equalized according to the distribution requirement, different types of lithium battery cores (different charging and discharging voltages) are allowed to be randomly connected in series and simultaneously charged and equalized, all the lithium battery cores connected in series are fully charged, and the total voltage of the lithium battery pack is higher and more stable; the equalizing charge module can remember who has discharged and is fully charged firstly in the use process and displays the position of the battery core with the capacity problem without special equipment or the process of charging and discharging again to finish the detection.

The product is technically characterized in that: the lithium battery equalizing charge module is characterized in that one module is correspondingly connected with a series of lithium battery cores, and each single lithium battery core is independently charged and equalized during equalizing charge; the external charger outputs power supply or 220V/380V alternating current direct power supply, and the electric energy of the lithium battery core is not consumed; the number of the lithium battery cores can be freely increased and decreased according to the requirement of the series connection number of the lithium battery cores; lithium battery equalizing charge modules with corresponding parameters can be freely combined by different types of lithium battery cores (different charging and discharging voltages); the module independently and automatically charges the lithium battery cells according to the voltage requirements of the corresponding lithium battery cells until the lithium battery cells are fully charged, so that the voltage balance of each series of lithium battery cells is achieved and the lithium battery cells are in a full-charge state; the equalizing charge module has the function of displaying who triggers the overcharge and overdischarge protection voltage thresholds first.

Aiming at the above purpose, the following technical solutions are provided:

the lithium battery equalizing charge module capable of being freely combined and independently managed in a single string comprises a shell structure male slot.

The lithium battery equalizing charge module capable of being freely combined and independently managed in a single string comprises a shell structure female slot.

The lithium battery equalizing charge module capable of being freely combined and independently managed by a single string comprises charge control.

The freely combined single-string independently managed lithium battery equalizing charge module comprises battery voltage monitoring.

The freely combinable single string independently managed lithium battery equalizing charge module comprises overcharge cut-off.

The freely combinable single string independently managed lithium battery equalizing charge module comprises overcharge signal transmission.

The freely combinable single string independently managed lithium battery equalizing charge module comprises overcharge indication.

The freely combined single-string independently managed lithium battery equalizing charge module comprises an overcharge signal latch.

The freely combined single string of independently managed lithium battery equalizing charge module comprises overdischarge signal transmission.

The freely combinable single string independently managed lithium battery equalizing charge module comprises an overdischarge indication.

The freely combined single-string independently managed lithium battery equalizing charge module comprises an overdischarge signal latch.

The freely combined single-string independently managed lithium battery equalizing charge module comprises a charge delay reset.

Compared with the existing lithium battery equalization technology, the lithium battery equalization method has the characteristics of novel design, strong practicability and substantial progress. Specifically speaking: the capacity of a multi-module set cooperative management battery can be freely combined in series by using a special circuit structure and a shell structure according to the function of increasing and decreasing the number of lithium battery cores; the lithium battery equalizing charge modules of different types (different charging and discharging voltages) can be freely combined into a series-parallel battery pack at will according to the requirements of the lithium battery core, the required total output voltage is obtained without influencing the equalizing effect, and the use is convenient.

The lithium battery equalizing charge modules are connected in series and integrated together, and the charging equalizing technology of an unfixed multi-thread form, distribution as required and continuous charge current can be adopted according to different voltages of the lithium battery cells connected in series, so that each lithium battery cell connected in series in the lithium battery pack can be quickly and uniformly charged to a full-charge termination voltage; when the capacity of the lithium battery core is greatly different or a plurality of different voltage values are directly taken from the serial connection positions of different lithium battery cores for output, the residual electric quantity caused by unbalanced discharge can be quickly and evenly charged to full-charge voltage; the method has the advantages of strong equalization capability, good equalization consistency and high reliability.

Meanwhile, the function of firstly triggering overcharge voltage and over-discharge voltage protection threshold when charging and discharging in the use process at the last time can be displayed, the position of the lithium battery core with the minimum capacity is prompted, and convenience is brought to maintenance of the lithium battery core.

Drawings

The attached figure 1 of the specification is a charging and discharging monitoring unit of the invention, the attached figure 2 of the specification is a shell structure unit of the invention, and the attached figure 3 of the specification is a multi-module combined charging and discharging current control unit of the invention.

Detailed Description

The technical solution of the present invention is further described in detail by the accompanying drawings and the detailed description.

When the lithium battery equalizing charge module has power input, a charge program is automatically started to execute constant-current and constant-voltage charge, and finally a constant-voltage state is maintained, and the lithium battery equalizing charge module only receives voltage control of a corresponding lithium battery cell and does not receive voltage interference of other lithium battery cells and charge and discharge control; the overcharge signal output and the overdischarge signal output are in an isolation form, can be directly connected with a plurality of modules correspondingly, directly transmit signals to the current switching unit, are selected by the relay J1 to be charged directly by an external charger or charged by the equalizing module, and are controlled by the relay J2 to discharge the battery pack.

As shown in the attached fig. 1, the freely combinable single string independently managed lithium battery equalizing charge module comprises: the device comprises a charging control module, a charging delay reset module, an overcharge cut-off module, a battery voltage monitoring module, an overcharge signal latch module, an overcharge indication module, an overcharge signal sending module, an overdischarge signal latch module, an overdischarge indication module and an overdischarge signal sending module.

As shown in the attached figure 2 in the specification, the freely combinable single-string independently managed lithium battery equalizing charge module shell structure is provided with a male slot and a female slot, and a plurality of modules can be freely spliced and assembled.

As shown in the attached fig. 3 of the specification, the lithium battery equalizing charge module with a plurality of freely combinable single strings for independent management is correspondingly connected with a plurality of lithium battery cores in series, and a current switching unit is provided with: signal processing and amplification, relay J1, relay J2, and K1.

Description of the working principle: when an external charger is connected with a current switching unit, a relay J1 is attracted to connect a positive pole of a lithium battery pack and a negative pole of the external charger, the external charger directly charges the series lithium battery pack, when a string of lithium battery cores reaches an overcharge protection voltage threshold value, an overcharge signal is generated corresponding to battery voltage monitoring in an equalizing charging module, after the overcharge signal is latched and received, a latch is 1, and a signal is output to an overcharge indication process and then transmitted to an overcharge signal for transmission, after the overcharge signal is received by the current switching unit, the signal is processed and amplified and then a relay J1 is driven to release, the positive pole of the external charger is cut off to be connected with the positive pole of the lithium battery pack, the external charger is stopped to directly charge the lithium battery pack, namely the series charging is stopped; meanwhile, after the relay J1 is released, the power supplies of all lithium battery equalizing charge modules are switched on, the equalizing charge function is started, equalizing current is cut off after overcharging, and is output to the corresponding lithium battery cores after battery voltage monitoring, namely, each single lithium battery core is independently charged (uniformly equalized) at the same time, the charging is determined by the voltage of the lithium battery core corresponding to each module by adopting a constant-current or constant-voltage mode, the lithium battery core which is fully charged first waits for the lithium battery core which is fully charged subsequently, and finally all the modules are maintained in a constant-voltage state; in the equalizing charge process, the voltage of other modules is not increased under the control of constant charging voltage, the voltage of other modules cannot reach the overcharge protection voltage threshold because the constant voltage is less than the overcharge protection voltage, the battery voltage monitoring of other modules does not output overcharge signals any more, and latches in the overcharge signal latches in other modules are 0.

If the charging system fails, the voltage is overhigh or the backward current is generated, the battery voltage monitoring sends out a control signal to control the overcharge cut-off, so that the charging system is disconnected from the lithium battery core, and the battery is protected from being overcharged. When the external charger is disconnected, the charging control in all the equalizing charging modules stops working, and other control circuits continue working.

When discharging, who reaches the discharge termination voltage in all the equalizing charge modules first, the battery voltage monitoring of the equalizing charge module generates an overdischarge signal, the latch which is sent to the overdischarge signal latch is 1, the overdischarge indication receives the overdischarge signal and then sends the overdischarge signal to the overdischarge signal after being processed, the current switching unit receives the overdischarge signal and then carries out signal processing, amplification and output to drive the relay J2 to be disconnected, the lithium battery pack stops discharging outwards, the voltage of all lithium battery cells rises and does not fall, the battery voltage monitoring in other equalizing charge modules does not generate the overdischarge signal, and the latches in the overdischarge signal latches in other equalizing charge modules are 0.

When power is supplied to all the equalizing charge modules after K1 or a relay J1 is pressed and released, the charging delay reset in all the equalizing charge modules generates display signals to indicate overdischarge and overcharge, and all LEDs corresponding to all latches 1 in all the overdischarge signal latches and overcharge signal latches emit light; the display signal output by the charging delay reset in the later period disappears, and the LED is turned off. And after long-time power supply, all the equalizing charge modules are powered off (an external charger is disconnected) H → L, and the charge delay in all the equalizing charge modules is reset to generate a reset signal, so that all latches in all the overdischarge signal latches and overcharge signal latches are 0, and preparation is made for next memory.

The invention belongs to the protection scope of the invention, and a single freely combinable single string of independently managed lithium battery equalizing charge module can manage a string of lithium battery cores, or a large module comprises a plurality of freely combinable single string of independently managed lithium battery equalizing charge modules to manage the circuit form of multiple strings of lithium battery cores.

The lithium battery equalizing charge module adopts 220V or 380V alternating current power supply, the lithium battery equalizing charge module directly charges in the whole process, an external charger is not needed, and the lithium battery equalizing charge module belongs to the protection scope of the invention.

Finally, it should be noted that: the products of the above embodiments are only used to illustrate the product technical solution of the present invention and not to limit the same; while the invention has been described in detail and with reference to preferred embodiments thereof, it will be appreciated by those skilled in the art that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims

1. The utility model provides a but lithium cell equalizing charge module of independent management of independent cluster of independent combination which characterized in that: including the female groove of shell structure male groove and shell structure convenient to concatenation assembly, constitute including charge and discharge monitoring unit, wherein charge and discharge monitoring unit still includes: the device comprises a charging control module, a charging delay reset module, a battery voltage monitoring module, an overcharge cut-off module, an overcharge signal latch module, an overcharge indication module, an overcharge signal sending module, an overdischarge signal latch module, an overdischarge indication module and an overdischarge signal sending module.

2. The freely combinable single string independently manageable lithium battery equalizing charge module of claim 1, further comprising: a lithium battery equalizing charge module capable of being freely combined and independently managed in a single string correspondingly and independently manages a lithium battery core, or a plurality of charging and discharging monitoring units are assembled into a large module to centrally manage a plurality of lithium battery cores.

3. The freely combinable single string independently manageable lithium battery equalizing charge module of claim 1, further comprising: the number of the lithium battery equalizing charge modules which can be freely combined and are independently managed in a single string can be freely increased or decreased according to the requirements of the lithium battery cores which are connected in series, or the lithium battery equalizing charge modules which can be freely combined and are independently managed in different types can be freely combined into a series-parallel battery pack according to the lithium battery cores in different types.

4. The freely combinable single string independently manageable lithium battery equalizing charge module of claim 1, further comprising: when a plurality of freely combinable single-string independently managed lithium battery equalizing charge modules are connected in series, the freely combinable single-string independently managed lithium battery equalizing charge module has the function of displaying the latest first triggering over-discharge protection voltage threshold value or the latest first triggering over-charge protection voltage threshold value.

5. The freely combinable single string independently manageable lithium battery equalizing charge module of claim 1, further comprising: the lithium battery equalizing charge module capable of being freely combined and independently managed in single string has the functions of monitoring the voltage of a lithium battery core and outputting an overcharge signal and an overdischarge signal, and also has the function of directly connecting a plurality of freely combined and independently managed lithium battery equalizing charge modules in series with the same signal.