CN219351294U - Battery charge-discharge power control device - Google Patents
Battery charge-discharge power control device Download PDFInfo
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- CN219351294U CN219351294U CN202221419374.3U CN202221419374U CN219351294U CN 219351294 U CN219351294 U CN 219351294U CN 202221419374 U CN202221419374 U CN 202221419374U CN 219351294 U CN219351294 U CN 219351294U
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- 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
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a battery charge and discharge power control device and an electronic device, wherein the device comprises: the battery pack, control module, inversion module and control bus, wherein the battery pack is set in the charge/discharge circuit, each battery pack is formed by connecting a preset number of batteries in series; the inversion module is connected with the battery pack and used for adjusting the charge/discharge power of the battery pack; the control module is connected with the battery pack and the inversion module through the control bus respectively and is used for acquiring parameter information of the battery pack and controlling the inversion module to adjust charging/discharging power. According to the utility model, the single voltage threshold value of the battery and the total voltage threshold value of the battery pack are configured by acquiring the parameters of the battery, and the charging/discharging power of the battery is controlled by combining the current single voltage and total voltage comprehensive judgment of the battery, so that the condition that the battery enters to limit the charging/discharging too early is avoided, the utilization rate of the battery is improved, the impact on the battery in different stages of charging/discharging is reduced, and the service life of the battery is prolonged.
Description
Technical Field
The utility model belongs to the technical field of battery charge/discharge control, and particularly relates to a battery charge/discharge power control device and electronic equipment.
Background
Currently, the battery types commonly used in the market are lithium iron phosphate batteries, ternary lithium batteries and the like, and are usually used in parallel or in series in a multi-group string form. The batteries have certain requirements on charge/discharge power, particularly the requirements on the charge/discharge power in the beginning and ending stages of charge/discharge are more strict, and excessive charge/discharge power can cause the electric quantity of the batteries to float in a virtual manner, so that the utilization efficiency of the batteries is affected; even causes the battery to be overcharged and overdischarged, seriously influences the service life of the battery and has certain potential safety hazard. A common solution is to control in such a way that a battery management device (BMS) limits the current, but this operation is usually to provide a BMS between the battery pack and the master, which increases the probability of malfunction and increases the cost.
Disclosure of Invention
First, the technical problem to be solved
The utility model aims to solve the problems of improving the charge/discharge efficiency and the battery utilization rate of a battery and prolonging the service life of the battery.
(II) technical scheme
To solve the above-mentioned technical problem, an aspect of the present utility model proposes a battery charge/discharge power control device for a battery charge/discharge circuit for charging/discharging at least two batteries, the device comprising: the battery pack, the control module, the inversion module and the control bus, wherein,
the battery packs are arranged in the charge/discharge circuit, and each battery pack is formed by connecting a preset number of batteries in series;
the inversion module is connected with the battery pack and used for adjusting the charge/discharge power of the battery pack;
the control module is respectively connected with the battery pack and the inversion module through a control bus and is used for acquiring parameter information of the battery pack and controlling the inversion module to adjust charging/discharging power.
According to a preferred embodiment of the utility model, the control module comprises:
a voltage threshold configuration unit for configuring a cell voltage threshold of each battery and a total voltage threshold of all batteries;
a voltage information acquisition unit for acquiring the cell voltage of each battery and the total voltage of all batteries in real time during charge/discharge;
and the voltage control unit is used for controlling the inversion module to reduce the power of charge/discharge when the single voltage of any battery reaches the single voltage threshold value or the total voltage of all batteries in the charge/discharge circuit reaches the total voltage threshold value.
According to a preferred embodiment of the present utility model, the voltage threshold configuration unit is further configured to:
acquiring parameter information of each battery;
different charge/discharge stages are set for the whole charge/discharge process of each battery;
and setting corresponding monomer voltage threshold and total voltage threshold for the charging/discharging stage according to the parameter information.
According to a preferred embodiment of the present utility model, the voltage threshold configuration unit is further configured to:
setting a stage in which the cell voltage and the overall voltage do not reach the corresponding threshold values when the battery is charged/discharged as a first stage;
the stage in which the cell voltage or the overall voltage at the time of charge/discharge of the battery reaches the corresponding threshold value is set as the second stage.
According to a preferred embodiment of the present utility model, the voltage threshold configuration unit is further configured to:
setting a single voltage threshold value at the time of charging in the second stage as a first threshold value according to the parameter information, and setting a total voltage threshold value as a second threshold value;
and setting the single voltage threshold value during the second stage discharge as a third threshold value and the total voltage threshold value as a fourth threshold value according to the parameter information.
According to a preferred embodiment of the utility model, the first threshold is 3.55V, the second threshold is 350V, the third threshold is 2.7V, and the fourth threshold is 280V.
According to a preferred embodiment of the utility model, the inverter module is further configured to: when the battery is in the first stage of charge/discharge, the charge/discharge power of the charge/discharge circuit is set to:
P＝IV total (S) ，
Wherein P is the charge/discharge power of the charge/discharge circuit, C is the total capacity of all batteries, I is the total current of the charge/discharge circuit, and the current value is equal to C and V which are 0.5 times Total (S) Is the total voltage of all cells.
According to a preferred embodiment of the utility model, the voltage control unit is further adapted to:
when the single voltage or the total voltage is larger than a corresponding threshold value, controlling the charge/discharge to become the second stage, and reducing the charge/discharge power to 0.2 times of the current charge/discharge power.
According to a preferred embodiment of the present utility model, the charge/discharge circuit is used for charging/discharging at least two battery packs connected in parallel, the battery packs comprising at least two batteries connected in series.
A second aspect of the present utility model proposes an electronic device comprising a processor and a memory for storing a computer executable program, which when executed by the processor performs the operations.
(III) beneficial effects
According to the utility model, the single voltage threshold value of the battery and the total voltage threshold value of the battery pack are configured by acquiring the parameters of the battery, and the charging/discharging power of the battery is controlled by combining the current single voltage of the battery and the total voltage comprehensive judgment of the battery pack, so that the condition that the battery enters to limit the charging/discharging too early is avoided, the utilization rate of the battery is improved, meanwhile, the impact on the battery in different stages of charging/discharging is reduced, the service life of the battery is prolonged, and compared with the conventional BMS current limiting scheme, the cost is saved.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a battery charge/discharge power control device of the present utility model;
fig. 2 is a schematic view of a battery charge/discharge power control device according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of the architecture of an electronic device of one embodiment of the utility model;
fig. 4 is a schematic diagram of a computer-readable recording medium of an embodiment of the present utility model.
Detailed Description
In describing particular embodiments, specific details of construction, performance, effects, or other features are set forth in order to provide a thorough understanding of the embodiments by those skilled in the art. It is not excluded, however, that one skilled in the art may implement the present utility model in a particular situation in a solution that does not include the structures, properties, effects, or other characteristics described above.
The block diagrams in the figures generally represent functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and/or processing unit means and/or microcontroller means.
The same reference numerals in the drawings denote the same or similar elements, components or portions, and thus repeated descriptions of the same or similar elements, components or portions may be omitted hereinafter. It will be further understood that, although the terms first, second, third, etc. may be used herein to describe various devices, elements, components or portions, these devices, elements, components or portions should not be limited by these terms. That is, these phrases are merely intended to distinguish one from the other. For example, a first device may also be referred to as a second device without departing from the spirit of the utility model. Furthermore, the term "and/or," "and/or" is meant to include all combinations of any one or more of the items listed.
The utility model provides a battery charge/discharge power control operation, which is used for a battery charge/discharge circuit, a BMS host is not needed, a control module is used for directly controlling an inversion module, the voltage of each battery cell and the total voltage of all batteries in the charge/discharge circuit are collected in real time, and when any cell voltage or total voltage is higher or lower than a preset threshold value, the charge/discharge power is automatically reduced, so that the purposes of improving the battery utilization rate and prolonging the service life of the battery are achieved.
The present utility model will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent.
In describing particular embodiments, specific details of construction, performance, effects, or other features are set forth in order to provide a thorough understanding of the embodiments by those skilled in the art. It is not excluded, however, that one skilled in the art may implement the present utility model in a particular situation in a solution that does not include the structures, properties, effects, or other characteristics described above.
The block diagrams in the figures generally represent functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and/or processing unit means and/or microcontroller means.
The same reference numerals in the drawings denote the same or similar elements, components or portions, and thus repeated descriptions of the same or similar elements, components or portions may be omitted hereinafter. It will be further understood that, although the terms first, second, third, etc. may be used herein to describe various devices, elements, components or portions, these devices, elements, components or portions should not be limited by these terms. That is, these phrases are merely intended to distinguish one from the other. For example, a first device may also be referred to as a second device without departing from the spirit of the utility model. Furthermore, the term "and/or," "and/or" is meant to include all combinations of any one or more of the items listed.
Fig. 1 is a schematic diagram of an embodiment of a battery charge/discharge power control device according to the present utility model.
As shown in fig. 1, the present operation includes:
s101, configuring a single voltage threshold value of each battery and a total voltage threshold value of all batteries.
In this step, firstly, parameter information of each battery in the charge/discharge circuit, such as rated voltage, rated current, battery capacity and the like of the battery when leaving the factory, is acquired, and when the battery is installed in the charge/discharge circuit, the acquired parameter information of each battery is firstly input into the control device, and for the different types of batteries, only corresponding parameters need to be modified in the control device, the control device automatically configures a circuit with the highest charge/discharge efficiency according to the input limiting conditions and the acquired battery parameter information, so that each battery in the circuit can meet limiting conditions and parameter ranges.
After the parameter information is acquired, different charge/discharge stages are set for the whole charge/discharge process, for example, the preset time at the beginning of the charge/discharge process and the preset time at the end of the charge/discharge process are set as the second stage, other times in the charge/discharge process are set as the first stage, the charge/discharge process is basically stable in the first stage of charge/discharge, and the influence on the battery is small; in the second stage of charge/discharge, since the battery is low in capacity or tends to be saturated, if the charge/discharge power of the first stage is reused, the battery is affected, and thus, in order to avoid this problem, a threshold value is set for the battery voltage during charge/discharge.
After the device is built to complete a charge/discharge circuit, a single voltage threshold is set for each battery in the circuit, and a total voltage threshold is set for the whole charge/discharge circuit, wherein the setting of the threshold is combined with parameters and characteristics of the battery, the general threshold range is within the range of inherent characteristics of the battery, for example, a battery with the voltage of 100AH, and the battery can only need to be used for 80AH when in use, and the voltage threshold is set according to the data, so that the battery is ensured to work in the stage with highest efficiency.
In the embodiment of the utility model, different voltage thresholds are set for the charging stage and the discharging stage of the battery, for example, when a circuit only comprises a battery pack formed by connecting 100 batteries in series, each battery pack is set when the battery pack is chargedThe maximum cell voltage threshold of each battery is 3.55V, and the maximum cell voltage is the voltage V of all batteries in the charging circuit 1 -V 100 The maximum voltage V of (2) max The threshold is reached when the charging voltage of any one of the 100 batteries in series reaches 3.55V. When setting the maximum total voltage threshold, the total voltage threshold is determined according to the circuit layout Total (S) In this way, if the circuit includes a plurality of parallel battery packs and each battery pack includes a plurality of series-connected batteries, the maximum total voltage threshold will be adjusted according to the layout of the circuit, and when the circuit includes only 100 battery packs formed by series-connected batteries, the maximum total voltage threshold of all the batteries in the circuit is set to be V during charging Total (S) =3.5×number of cells, i.e. 350V, if the circuit contains 2 parallel battery packs, each battery pack contains 50 cells connected in series, V Total (S) When the total voltage in the charging circuit is higher than V Total (S) The threshold is reached.
In the battery discharging stage, the minimum cell voltage threshold of each battery can be set to be 2.7V, and the minimum cell voltage is the voltage V of all the batteries in the discharging circuit 1 -V 100 Voltage V of minimum min The threshold is reached when the charging voltage of any one of the 100 batteries in series reaches 2.7V. When the circuit only comprises a battery pack formed by connecting 100 batteries in series, setting the minimum total voltage threshold value of all the batteries in the circuit to be V when discharging Total (S) The number of cells is =2.8, i.e. 280V, if the circuit contains 2 parallel battery packs, each battery pack contains 50 series-connected cells, V Total (S) When the total voltage in the charging circuit is lower than V =140V Total (S) The threshold is reached.
S102, acquiring the single voltage of each battery and the total voltage of all batteries in real time during charge/discharge.
In this step, first, according to the time of charging/discharging the battery, it is determined whether the current charging/discharging stage of the battery belongs to the first stage or the second stage, then the cell voltage of each battery and the total voltage of all the batteries in the whole charging/discharging circuit are obtained, a sensor CAN be set for each battery, and the sensor sends the data such as the voltage and current of the battery to the control device through the CAN bus in real time.
And S103, when the single voltage of any battery reaches the single voltage threshold value or the total voltage of all batteries in the charge/discharge circuit reaches the total voltage threshold value, reducing the charge/discharge power.
In this step, when the charge/discharge process of the battery is in the first stage, the charge/discharge power of the charge/discharge circuit is:
P＝IV total (S) ，
Wherein P is the charge/discharge power of the charge/discharge circuit, C is the total capacity of all batteries, I is the total current of the charge/discharge circuit, and the current value is equal to 0.5 times C, for example, the total capacity of the battery pack is 100AH, then the corresponding current value is 0.5×100=50a, v Total (S) Is the total voltage of all cells.
When the charge/discharge process of the battery is in the second stage, or when the cell voltage of any battery reaches the cell voltage threshold, or the total voltage of all batteries in the charge/discharge circuit reaches the total voltage threshold, the charge/discharge power is reduced by 0.2 times of the charge/discharge power in the first stage, namely P=IV Total (S) That is, the current value is equal to 0.1 times C, the efficiency and safety of the battery charge/discharge in the second stage are ensured.
The operation of the embodiment of the utility model configures the single voltage threshold of the battery and the total voltage threshold of the battery pack by acquiring the parameters of the battery, combines the comprehensive judgment of the single voltage of the current battery and the total voltage of the battery pack, controls the charge/discharge power of the battery, avoids the condition that the battery enters to limit the charge/discharge too early, improves the utilization rate of the battery, reduces the impact on the battery in different stages of charge/discharge, prolongs the service life of the battery, and saves the cost compared with the conventional BMS current limiting scheme.
Embodiments of the apparatus of the present utility model are described below, which may be used to perform operational embodiments of the present utility model. Details described in the embodiments of the device according to the utility model should be regarded as additions to the operating embodiments described above; for details not disclosed in the embodiments of the device of the present utility model, reference may be made to the above-described operating embodiments.
Fig. 2 is a schematic diagram of a battery charge/discharge power control device according to an embodiment of the present utility model.
The device comprises: the battery pack, the control module, the inversion module and the control bus.
The battery packs are arranged in the charge/discharge circuit, and each battery pack is formed by connecting a preset number of batteries in series;
the inversion module is connected with the battery pack and used for adjusting the charge/discharge power of the battery pack;
the control module is respectively connected with the battery pack and the inversion module through a control bus and is used for acquiring parameter information of the battery pack and controlling the inversion module to adjust charging/discharging power.
Specifically, the control module comprises two parts of functions of data acquisition and service control, including:
a voltage threshold configuration unit for configuring a cell voltage threshold of each battery and a total voltage threshold of all batteries;
a voltage information acquisition unit for acquiring the cell voltage of each battery and the total voltage of all batteries in real time during charge/discharge;
and the voltage control unit is used for controlling the inversion module to reduce the charging/discharging power when the single voltage of any battery reaches the single voltage threshold value or the total voltage of all batteries in the charging/discharging circuit reaches all total voltage threshold values.
The voltage threshold configuration unit is further used for acquiring parameter information of each battery, such as rated voltage, rated current, battery capacity and the like of the batteries when the batteries leave the factory, aiming at the inconsistency of battery parameters of different types and different capacities, when the batteries are installed in the charging/discharging circuit, the acquired parameter information of each battery is firstly input into the control device, for the batteries of different types, only corresponding parameters are required to be modified in the control module, and the control module automatically configures a circuit with the highest charging/discharging efficiency according to the input limiting conditions and the acquired battery parameter information, so that each battery in the circuit meets limiting conditions and parameter ranges;
the voltage threshold configuration unit is further configured to set different charge/discharge phases for the whole charge/discharge process of each battery, for example, set a preset time at the beginning of the charge/discharge process and a preset time at which the charge/discharge is terminated soon as a second phase, set other times in the charge/discharge process as a first phase, and basically stabilize the charge/discharge process in the first phase of charge/discharge, so that the influence on the battery is small; in the second stage of charge/discharge, since the battery is low in capacity or tends to be saturated, if the charge/discharge power of the first stage is reused, the battery is affected, and thus, in order to avoid this problem, a threshold value is set for the battery voltage during charge/discharge. After the device is built to complete a charge/discharge circuit, a single voltage threshold is set for each battery in the circuit, and a total voltage threshold is set for the whole charge/discharge circuit, wherein the setting of the threshold is combined with parameters and characteristics of the battery, the general threshold range is within the range of the inherent characteristics of the battery, for example, a battery with the voltage of 100AH, and the voltage threshold is set according to the data only by 80AH when the device is used, so that the battery is ensured to work in the stage with highest efficiency. In an embodiment of the utility model, different voltage thresholds are set for the charge phase and the discharge phase of the battery.
The voltage information acquisition unit determines whether the current charge/discharge stage of the battery belongs to the first stage or the second stage according to the charge/discharge time of the battery, then acquires the single voltage of each battery and the total voltage of all batteries in the whole charge/discharge circuit, and CAN set a sensor for each battery, and the sensor sends the voltage, current and other data of the battery to the voltage information acquisition unit through the CAN bus in real time.
When the charging/discharging process of the battery is in the first stage, the voltage control unit controls the charging/discharging power of the charging/discharging circuit to be as follows:
P＝IV total (S) ，
Wherein P is the charge/discharge power of the charge/discharge circuit, C is the total capacity of all batteries, I is the total current of the charge/discharge circuit, and the current value is equal to 0.5 timesC，V Total (S) Is the total voltage of all cells.
In the charging process, when the highest single voltage of the battery is higher than a threshold value or the total voltage of the battery exceeds the threshold value, the voltage control unit controls the first stage to be changed into the second stage, and the input power of the inversion module is reduced. In the discharging process, when the lowest cell voltage of the battery is lower than the threshold value or the total voltage of the battery is lower than the threshold value, the voltage control unit controls the first stage to be changed into the second stage, the output power of the inversion module is reduced, and the charging/discharging power at the moment is reduced by 0.2 times of the charging/discharging power of the first stage, namely
P＝IV Total (S) That is, the current value is equal to 0.1 times C, the efficiency and safety of the battery charge/discharge in the second stage are ensured.
It will be appreciated by those skilled in the art that the modules in the embodiments of the apparatus described above may be distributed in an apparatus as described, or may be distributed in one or more apparatuses different from the embodiments described above with corresponding changes. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.
Fig. 3 is a schematic structural view of an electronic device according to an embodiment of the present utility model, the electronic device including a processor and a memory for storing a computer-executable program, the processor performing a battery charge/discharge power control operation when the computer program is executed by the processor.
As shown in fig. 3, the electronic device is in the form of a general purpose computing device. The processor may be one or a plurality of processors and work cooperatively. The utility model does not exclude that the distributed processing is performed, i.e. the processor may be distributed among different physical devices. The electronic device of the present utility model is not limited to a single entity, but may be a sum of a plurality of entity devices.
The memory stores a computer executable program, typically machine readable code. The computer readable program may be executed by the processor to enable the electronic device to perform the operations, or at least some of the steps of the operations, of the present utility model.
The memory includes volatile memory, such as Random Access Memory (RAM) and/or cache memory, and may be non-volatile memory, such as Read Only Memory (ROM).
Optionally, in this embodiment, the electronic device further includes an I/O interface, which is used for exchanging data between the electronic device and an external device. The I/O interface may be a bus representing one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.
It should be understood that the electronic device shown in fig. 3 is only one example of the present utility model, and the electronic device of the present utility model may further include elements or components not shown in the above examples. For example, some electronic devices further include a display unit such as a display screen, and some electronic devices further include a man-machine interaction element such as a button, a keyboard, and the like. The electronic device may be considered as covered by the present utility model as long as the electronic device is capable of executing a computer-readable program in memory to perform at least part of the operations or steps of the operations of the present utility model.
Fig. 4 is a schematic diagram of a computer-readable recording medium of an embodiment of the present utility model. As shown in fig. 4, a computer-readable recording medium stores therein a computer-executable program that, when executed, implements the above-described battery charge/discharge power control operation of the present utility model. The computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable storage medium may also be any readable medium that can communicate, propagate, or transport a program for use by or in connection with an instruction execution apparatus, device, or apparatus. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
The above-described specific embodiments further describe the objects, technical solutions and advantageous effects of the present utility model in detail, and it should be understood that the present utility model is not inherently related to any particular computer, virtual device or electronic apparatus, and various general-purpose devices may also implement the present utility model. The foregoing description of the embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (3)
1. A battery charge/discharge power control apparatus for a battery charge/discharge circuit for charging/discharging at least two batteries, the apparatus comprising: the battery pack, the control module, the inversion module and the control bus, wherein,
the battery packs are arranged in the charge/discharge circuit, and each battery pack is formed by connecting a preset number of batteries in series;
the inversion module is connected with the battery pack and used for adjusting the charge/discharge power of the battery pack;
the control module is respectively connected with the battery pack and the inversion module through a control bus and is used for acquiring parameter information of the battery pack and controlling the inversion module to adjust charging/discharging power.
2. The battery charge-discharge power control device according to claim 1, wherein the control module includes:
a voltage threshold configuration unit for configuring a cell voltage threshold of each battery and a total voltage threshold of all batteries;
a voltage information acquisition unit for acquiring the cell voltage of each battery and the total voltage of all batteries in real time during charge/discharge;
and the voltage control unit is used for controlling the inversion module to reduce the power of charge/discharge when the single voltage of any battery reaches the single voltage threshold value or the total voltage of all batteries in the charge/discharge circuit reaches the total voltage threshold value.
3. The battery charge/discharge power control device according to claim 1, wherein the charge/discharge circuit is configured to charge/discharge at least two battery packs connected in parallel, the battery packs including at least two batteries connected in series.
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| CN202221419374.3U CN219351294U (en) | 2022-06-07 | 2022-06-07 | Battery charge-discharge power control device |
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| CN114844176A (en) * | 2022-06-07 | 2022-08-02 | 青岛能蜂电气有限公司 | Battery charging and discharging power control method and device and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114844176A (en) * | 2022-06-07 | 2022-08-02 | 青岛能蜂电气有限公司 | Battery charging and discharging power control method and device and electronic equipment |
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