CN117175748A - Battery state parameter balancing method, energy storage unit, BMS and storage medium - Google Patents
Battery state parameter balancing method, energy storage unit, BMS and storage medium Download PDFInfo
- Publication number
- CN117175748A CN117175748A CN202311414499.6A CN202311414499A CN117175748A CN 117175748 A CN117175748 A CN 117175748A CN 202311414499 A CN202311414499 A CN 202311414499A CN 117175748 A CN117175748 A CN 117175748A
- Authority
- CN
- China
- Prior art keywords
- battery
- cluster
- battery cluster
- energy storage
- storage unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 75
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000004590 computer program Methods 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 description 14
- 238000012545 processing Methods 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 102000003780 Clusterin Human genes 0.000 description 1
- 108090000197 Clusterin Proteins 0.000 description 1
- 210000003719 b-lymphocyte Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Abstract
The application relates to a battery state parameter balancing method, an energy storage unit, a BMS and a storage medium, wherein the method comprises the following steps: in the process of charging and discharging the energy storage unit, battery state parameters of each battery cluster connected in parallel in the energy storage unit are obtained. Further, under the condition that the battery state parameters of any battery cluster meet the preset balance condition, the pre-charge resistor branch corresponding to the target battery cluster in each battery cluster is controlled to be in a conducting state, so that the pre-charge resistor in the pre-charge resistor branch is integrated into the loop corresponding to the target battery cluster. Compared with the related art, in the embodiment of the application, by adjusting the on-off state of the pre-charging resistor branch corresponding to the battery cluster in the energy storage unit, no additional equipment is needed, so that the adjustment cost can be saved, and the occupied space can be saved.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to a battery state parameter balancing method, an energy storage unit, a BMS and a storage medium.
Background
The energy storage unit in the energy storage system can store a large amount of electric energy, not only can be beneficial to improving the electric energy quality of a power grid, but also can effectively utilize renewable energy sources, so that the energy storage unit is widely applied to the power generation and distribution field of a power system.
In general, the energy storage unit includes a plurality of battery clusters, and there may be a current imbalance problem or an SOC imbalance problem between some battery clusters due to structural differences and/or connection differences among the battery clusters. In the related art, a current imbalance problem or a State of Charge (SOC) imbalance problem is regulated by adding a DC-to-DC (DCDC) converter or the like. As can be seen, the adjustment costs of the related art are high.
Disclosure of Invention
In view of the above, the present application provides a battery state parameter balancing method, an energy storage unit, a BMS and a storage medium, which can solve the problem of high adjustment cost in the related art.
In a first aspect, the present application provides a method for equalizing battery state parameters, the method comprising:
in the charging and discharging process of the energy storage unit, acquiring battery state parameters of each battery cluster in the energy storage unit, wherein the energy storage unit comprises a plurality of battery clusters, each battery cluster is connected into a bus line through a corresponding charging and discharging control circuit, the charging and discharging control circuit comprises a pre-charging resistance branch and a direct charging branch which are connected in parallel, the impedance of the pre-charging resistance branch is larger than that of the direct charging branch, and the direct charging branch is in a normally-on state in the current charging and discharging process;
And under the condition that the preset balance condition is met according to the battery state parameters of each battery cluster, controlling the pre-charge resistor branch corresponding to the target battery cluster in each battery cluster to be switched into a conducting state.
According to the technical scheme provided by the embodiment of the application, when the battery state parameters of any battery cluster are detected to meet the preset balance condition according to the battery state parameters of all battery clusters in the energy storage unit, the loop resistance value corresponding to the target battery cluster is regulated by controlling the pre-charge resistance branch corresponding to the target battery cluster in the all battery clusters to be in a conducting state, so that the current corresponding to the target battery cluster can be regulated. The total loop current of each battery cluster in the energy storage unit is constant, so that the current adjustment of each battery cluster in the energy storage unit is realized. Compared with the related art, in the embodiment of the application, by adjusting the on-off state of the pre-charging resistor branch corresponding to the battery cluster in the energy storage unit, no additional equipment is needed, so that the adjustment cost can be saved, and the occupied space can be saved.
In some embodiments, the method further comprises:
and under the condition that the preset balance condition is met according to the battery state parameters of each battery cluster, determining the target battery cluster from the battery clusters included in the energy storage unit according to the battery state parameters of each battery cluster.
According to the technical scheme, under the condition that the preset balance condition is met according to the battery state parameters of each battery cluster, the target battery cluster to be adjusted is determined from the battery clusters included in the energy storage unit according to the battery state parameters of each battery cluster, so that the current adjustment of each battery cluster in the energy storage unit is realized by controlling the pre-charge resistance branch corresponding to the target battery cluster to be switched into the conducting state.
In some embodiments, the method further comprises:
determining whether a first battery cluster with the battery state parameters larger than those of other battery clusters exists according to the battery state parameters of each battery cluster;
if so, determining that the preset balance condition is met.
According to the technical scheme provided by the embodiment of the application, whether the energy storage unit meets the preset balance condition can be determined in real time by determining whether the energy storage unit meets the preset balance condition according to the magnitude relation of the battery state parameters of each battery cluster, so that the current regulation of each battery cluster in the energy storage unit can be realized by controlling the pre-charge resistance branch corresponding to the target battery cluster to be switched into the conducting state under the condition that the battery state parameters of any battery cluster meet the preset balance condition.
In some embodiments, determining a target battery cluster from a plurality of battery clusters included in the energy storage unit according to a battery state parameter of each battery cluster includes:
and determining the target battery cluster according to the other battery clusters except the first battery cluster in the plurality of battery clusters.
In some embodiments, the method further comprises:
determining whether a second battery cluster with the battery state parameters smaller than those of other battery clusters exists according to the battery state parameters of each battery cluster;
if so, determining that the preset balance condition is met.
According to the technical scheme provided by the embodiment of the application, whether the energy storage unit meets the preset balance condition can be determined in real time by determining whether the energy storage unit meets the preset balance condition according to the magnitude relation of the battery state parameters of each battery cluster, so that the current regulation of each battery cluster in the energy storage unit can be realized by controlling the pre-charge resistance branch corresponding to the target battery cluster to be switched into the conducting state under the condition that the battery state parameters of any battery cluster meet the preset balance condition.
In some embodiments, determining a target battery cluster from a plurality of battery clusters included in the energy storage unit according to a battery state parameter of each battery cluster includes:
And determining the second battery cluster as a target battery cluster.
In some embodiments, controlling the precharge resistor branch corresponding to the target battery cluster in each battery cluster to be switched to the on state includes:
under the condition that the target battery clusters comprise a plurality of target battery clusters, according to battery state parameters of each target battery cluster, the pre-charge resistor branch corresponding to each target battery cluster is controlled to be switched into a conducting state according to a preset conducting rule.
According to the technical scheme provided by the embodiment of the application, under the condition that the target battery clusters comprise a plurality of target battery clusters, the circuit resistance value corresponding to each target battery cluster can be more effectively and reasonably regulated by controlling the pre-charge resistance branch corresponding to each target battery cluster to be switched into the conducting state according to the preset conducting rule according to the battery state parameters of each target battery cluster, so that the current of each battery cluster in the energy storage unit can be more effectively and reasonably regulated, and the energy consumption of the energy storage unit can be further saved on the basis of realizing the balanced treatment of the battery state parameters of each battery cluster.
In some embodiments, the preset conduction rule is used to indicate that the duration of the conduction state is inversely related to the magnitude of the battery state parameter of the target battery cluster.
In some embodiments, the method further comprises:
and under the condition that the preset balance condition is not met according to the battery state parameters of each battery cluster, controlling the pre-charge resistor branch corresponding to the target battery cluster to be switched into the disconnected state.
According to the technical scheme provided by the embodiment of the application, under the condition that the energy storage unit does not meet the preset balance condition according to the battery state parameters of each battery cluster, the pre-charging resistor branch corresponding to the target battery cluster is controlled to be switched into the off state, so that the pre-charging resistor in the pre-charging resistor branch is not integrated into the loop corresponding to the target battery cluster, and the loop resistance corresponding to the target battery cluster (namely the impedance of the direct charging branch corresponding to the target battery cluster) can be recovered, thereby being beneficial to saving the energy loss of the energy storage unit.
In a second aspect, the present application provides an energy storage unit comprising: the battery management system BMS and a plurality of battery clusters which are connected into the bus bar line through corresponding charge and discharge control circuits respectively; the charge-discharge control circuit comprises a pre-charge resistance branch and a direct-charge branch which are connected in parallel, wherein the impedance of the pre-charge resistance branch is larger than that of the direct-charge branch, and the direct-charge branch is in a normally-on state in the current charge-discharge process;
The BMS is used for acquiring battery state parameters of each battery cluster in the energy storage unit in the charging and discharging process of the energy storage unit, and controlling the pre-charging resistor branch corresponding to the target battery cluster in each battery cluster to be switched into a conducting state under the condition that the preset balance condition is determined to be met according to the battery state parameters of each battery cluster.
In a third aspect, the present application provides a BMS, including a memory storing a computer program and a processor implementing the steps of the above-described embodiments of the battery state parameter balancing method when the processor executes the computer program.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of an embodiment of a battery state parameter balancing method as described above.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
Fig. 1 is a schematic structural diagram of an energy storage unit according to an embodiment of the present application;
fig. 2 is a schematic diagram of a charge-discharge control circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a charge-discharge control circuit according to a second embodiment of the present application;
fig. 4 is a flowchart illustrating a battery state parameter balancing method according to some embodiments of the present application;
fig. 5 is a flowchart of a battery state parameter balancing method according to another embodiment of the present application;
fig. 6 is a flowchart of a battery state parameter balancing method according to another embodiment of the present application;
fig. 7 is a schematic structural diagram of an energy storage unit according to an embodiment of the present application.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the term "comprising" and any variations thereof in the description of the application and the claims and the description of the figures above is intended to cover a non-exclusive inclusion.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more (including two) unless otherwise specifically defined.
With the development of energy storage technology, the energy storage units may be divided into a group string type energy storage unit and a centralized energy storage unit. Each battery cluster in the group string type energy storage unit can be respectively connected with a corresponding energy storage converter (Power Conversion System, PCS) so as to adjust the current imbalance problem or the SOC imbalance problem in a mode that different PCS adjusts the corresponding battery cluster. Multiple battery clusters in the centralized energy storage unit can correspond to a common PCS, and the current imbalance problem or the SOC imbalance problem is regulated by adding devices such as a DCDC converter.
The battery state parameter balancing method, the energy storage unit, the BMS and the storage medium provided by the embodiment of the application can be applied to a battery state parameter balancing application scene in a centralized energy storage unit; of course, it can also be applied to other application scenarios.
In the related art, the current imbalance problem or the SOC imbalance problem is regulated by adding devices such as a DCDC converter. It can be seen that the related art adjustment method requires additional equipment, and thus the related art adjustment cost is high.
In order to avoid adding additional equipment to adjust the current imbalance problem or the SOC imbalance problem, the embodiment of the present application proposes that the loop current can be changed by adjusting the resistance based on the formula i=u/R, and on the other hand, the loop resistance can be reduced by parallel-connecting the resistances based on the formula r= (r0×r1)/(r0+r1).
Based on the above consideration, in order to solve the problem of higher adjustment cost in the related art, the embodiment of the application proposes a method of adjusting the on-off state of the pre-charge resistor branch corresponding to the target battery cluster in real time according to the difference of the battery state parameters of each battery cluster in the energy storage unit, so as to adjust the loop resistance corresponding to the target battery cluster, so that the current corresponding to the target battery cluster can be adjusted. The total loop current of each battery cluster in the energy storage unit is constant, so that the current adjustment of each battery cluster in the energy storage unit is realized, the current consistency of each battery cluster in the energy storage unit is facilitated, and meanwhile, the SOC difference between each battery cluster is reduced. Compared with the related art, the embodiment of the application does not need to add extra equipment by adjusting the on-off state of the pre-charge resistor branch corresponding to the battery cluster in the energy storage unit, thereby saving the adjustment cost and saving the occupied space.
For the convenience of understanding, the structure of the energy storage unit is exemplarily described in the following embodiments of the present application.
Fig. 1 is a schematic structural diagram of an energy storage unit according to an embodiment of the present application, as shown in fig. 1, the energy storage unit according to an embodiment of the present application may include a plurality of battery clusters, and it should be noted that fig. 1 illustrates that the energy storage unit includes 9 battery clusters (or referred to as "Rack") as an example; each battery cluster may include a plurality of battery packs (or referred to as Pack) connected in series, and it should be noted that fig. 1 illustrates that each battery cluster includes 8 battery packs. Each of the battery clusters may be connected to the bus line H through a corresponding charge and discharge control circuit C so as to be commonly connected to the PCS through the bus line H.
It should be noted that, in the embodiment of the present application, each battery cluster is connected to the PCS by way of an access bus line, and of course, each battery cluster may also be connected to the PCS by other ways.
Fig. 2 is a schematic diagram of a charge-discharge control circuit according to an embodiment of the present application, as shown in fig. 2, the charge-discharge control circuit according to an embodiment of the present application may include, but is not limited toThe impedance of the pre-charge resistive branch P is larger than that of the direct charging branch D. Illustratively, the precharge resistor branch P may include, but is not limited to, a precharge resistor R p And a precharge switch K p The method comprises the steps of carrying out a first treatment on the surface of the The direct charging branch may include, but is not limited to, a direct charging switch K d (direct charging switch K) d Has a certain impedance); any of the switches involved in embodiments of the present application may include, but are not limited to, relays.
Under normal conditions, in the initial stage of the charge-discharge process, the direct charge branch circuit can be controlled to be switched into an off state and the precharge resistor branch circuit can be controlled to be switched into an on state, so that charge-discharge current can pass through the precharge resistor branch circuit, and the precharge resistor branch circuit comprises the precharge resistor, so that the charge-discharge current can be limited to prevent the charge-discharge current from being overlarge. In the normal stage (i.e., non-initial stage) of the charge-discharge process, the precharge resistor branch circuit can be controlled to be switched to an off state and the direct charge branch circuit can be controlled to be switched to an on state, so that the charge-discharge current can pass through the direct charge branch circuit.
In the embodiment of the application, in the normal stage (i.e., the non-initial stage) of the charge and discharge process, if the preset balance condition is met according to the battery state parameters of each battery cluster, the pre-charge resistor branch corresponding to the target battery cluster in each battery cluster can be controlled to be switched to the conducting state, so that the pre-charge resistor is integrated into the loop corresponding to the target battery cluster, the loop resistance corresponding to the target battery cluster can be conveniently adjusted, and the current corresponding to the target battery cluster can be adjusted.
Fig. 3 is a schematic diagram of a second structure of a charge-discharge control circuit according to an embodiment of the present application, as shown in fig. 3, one end b+ 'of a positive pole branch of the charge-discharge control circuit in the embodiment of the present application may be connected to a positive pole b+ of a corresponding battery cluster, and the other end hv+' of the positive pole branch may be connected to a positive pole hv+ of a busbar wire through a disconnecting switch QS. The terminal QS+ and the terminal QS-of the isolating switch QS are low-voltage control terminals of the isolating switch QS, and the terminals 1-4 of the isolating switch QS are high-voltage contact terminals of the isolating switch QS.
The positive branch may also be provided with a positive fuse FU1, anda pre-charge resistor branch P and a direct charge branch D connected in parallel with the positive fuse FU1, wherein the direct charge branch D can comprise a direct charge switch K d The method comprises the steps of carrying out a first treatment on the surface of the The precharge resistor branch P may include a precharge resistor R p And a precharge switch K p . Wherein, directly fill switch K d T1-terminal and T2+ terminal of (C) are direct charging switch K d Low voltage control terminal of (2), direct charging switch K d A1+ terminal and A2-terminal of (C) are direct charging switch K d A high voltage contact terminal of (2); prefill switch K p T3+ terminal and T4-terminal of (C) are precharge switches K p Low voltage control terminal of (2), precharge switch K p A3+ terminal and A4-terminal of (C) are precharge switches K p Is provided.
One end B- 'of a negative pole branch of the charge-discharge control circuit in the embodiment of the application can be connected with a negative pole B-of a corresponding battery cluster, and the other end HV-' of the negative pole branch can be connected with a negative pole HV-of a bus bar line through a disconnecting switch QS. The anode branch circuit can be also provided with a cathode fuse FU2, a current sensor S and a cathode switch K which are connected in series n . The current sensor S is used for detecting the charge and discharge current of the battery cluster corresponding to the charge and discharge control circuit and sending the charge and discharge current of the battery cluster to the BMS; the CANL end and the CANH end of the current sensor S are signal ends, connected with the BMS, of the current sensor S, and the GND end and the Power end of the current sensor S are Power supply ends of the current sensor S. Negative electrode switch K n T5-terminal and T6+ terminal of (C) are negative electrode switches K n Low voltage control terminal of (1), negative electrode switch K n A5+ terminal and A6-terminal of (C) are negative electrode switch K n Is provided.
In general, during the charging process of the energy storage unit, the charging current can flow to the positive electrode HV +)>Direct charging switch K d ->Positive fuse FU1->Positive electrode B+ of battery cluster>Battery cluster->Negative electrode B-cell cluster>Negative fuse FU2->Current sensor S->Negative electrode switch K n ->Negative electrode HV-of bus bar line. In the embodiment of the application, in the charging process of the energy storage unit, if the battery cluster corresponding to the charge-discharge control circuit is the target battery cluster, the precharge switch K can be controlled p Switch to the on state to make the pre-charge resistor R p Incorporation of a corresponding return to a target battery clusterIn the road, the loop resistance value corresponding to the target battery cluster can be conveniently adjusted, so that the charging current corresponding to the target battery cluster can be adjusted.
In the discharging process of the energy storage unit, the flow direction of the discharging current can be the positive pole B+ of the battery cluster>Positive fuse FU1->Direct charging switch K d ->Positive electrode HV + & gt of bus bar line>Negative pole HV-of busbar line>Negative electrode switch K n ->Current sensor S->Negative fuse FU2->And a negative electrode B of the battery cluster. In the embodiment of the application, in the discharging process of the energy storage unit, if the battery cluster corresponding to the charge-discharge control circuit is the target battery cluster, the pre-charge switch K can be controlled p Switch to the on state to make the pre-charge resistor R p And the current is integrated into a loop corresponding to the target battery cluster, so that the loop resistance value corresponding to the target battery cluster can be adjusted, and the discharge current corresponding to the target battery cluster can be adjusted.
It should be noted that, the charge-discharge control circuit in the embodiment of the present application may also adopt other circuit forms, but as long as the charge-discharge control circuit includes a precharge resistor branch and a direct charge branch, the battery state parameter balancing method provided by the embodiment of the present application may be adopted.
In some embodiments, fig. 4 is a flowchart of a battery state parameter balancing method according to some embodiments of the present application, and in the embodiments of the present application, a battery management system (Battery Management System, BMS) to which the method is applied to the above-mentioned energy storage unit is illustrated as an example. As shown in fig. 4, the method according to the embodiment of the present application may include the following steps:
Step S401, obtaining battery state parameters of each battery cluster in the energy storage unit during the charge and discharge process of the energy storage unit.
For example, the energy storage unit in the embodiment of the present application may include a plurality of battery clusters, where each battery cluster is connected to the bus line through a corresponding charge/discharge control circuit, so that the battery clusters may be commonly connected to the PCS through the bus line. It should be noted that, in the embodiment of the present application, each battery cluster is connected to the PCS by way of an access bus line, and of course, each battery cluster may also be connected to the PCS by other ways.
The charge-discharge control circuit in the embodiment of the application may include, but is not limited to, a pre-charge resistor branch and a direct-charge branch connected in parallel, where the impedance of the pre-charge resistor branch is greater than the impedance of the direct-charge branch, and the direct-charge branch is in a normally-on state in the current charge-discharge process. It should be understood that the current charge and discharge process in the embodiments of the present application may include, but is not limited to, a normal phase (i.e., a non-initial phase) of the charge and discharge process.
The battery state parameters of the battery cluster according to the embodiment of the present application may include, but are not limited to: battery current parameters of the battery cluster, and/or battery SOC parameters of the battery cluster.
In this step, in the charge and discharge process of the energy storage unit, the BMS may obtain the battery state parameters of each battery cluster in the energy storage unit, so as to determine whether a preset balance condition is satisfied according to the battery state parameters of each battery cluster.
It should be understood that the BMS may acquire the battery state parameters of each battery cluster in the energy storage unit in real time, acquire the battery state parameters of each battery cluster in the energy storage unit every a preset time period, or acquire the battery state parameters of each battery cluster in the energy storage unit in case of detecting the acquisition command.
The BMS may obtain the battery current parameter of the battery cluster through a current sensor in a charge/discharge control circuit corresponding to the battery cluster, or the BMS may determine the battery current parameter of the battery cluster by detecting the voltage of the battery cluster and determining the battery current parameter of the battery cluster according to the voltage of the battery cluster and the like. Of course, the BMS may acquire the battery current parameters of the battery clusters in other manners.
The BMS may determine the battery SOC parameter of the battery cluster by detecting the voltage of the battery cluster and according to the voltage of the battery cluster, or may determine the battery SOC parameter of the battery cluster by detecting the capacity of the battery cluster and according to the capacity of the battery cluster, for example. Of course, the BMS may also obtain the battery SOC parameter of the battery cluster in other manners.
Step S402, under the condition that the preset balance condition is met according to the battery state parameters of each battery cluster, the precharge resistor branch corresponding to the target battery cluster in each battery cluster is controlled to be switched into a conducting state.
The preset equalization condition in the embodiment of the application can be used for indicating the preset condition for performing equalization processing on the battery clusters in the energy storage unit. Illustratively, the preset equalization conditions may include, but are not limited to: the energy storage unit is provided with a first battery cluster with battery state parameters larger than those of other battery clusters, or the energy storage unit is provided with a second battery cluster with battery state parameters smaller than those of other battery clusters.
Still another exemplary, preset equalization conditions may include, but are not limited to: the energy storage unit is provided with a first battery cluster, wherein the battery state parameters of the first battery cluster are larger than those of other battery clusters, and the difference value of the battery state parameters of the first battery cluster and the other battery clusters in the energy storage unit is larger than a first preset difference value threshold; or, a second battery cluster with battery state parameters smaller than those of other battery clusters exists in the energy storage unit, and the difference value of the battery state parameters of the other battery clusters in the energy storage unit and the second battery cluster is larger than a first preset difference value threshold value, so that equalization processing can be performed under the condition that the battery state parameter difference value of the battery cluster in the energy storage unit is larger than the first preset difference value threshold value.
In this step, when it is determined that the preset balance condition is met according to the battery state parameters of each battery cluster, the BMS may control the precharge resistor branch corresponding to the target battery cluster to be adjusted in each battery cluster to be switched to the on state, so that the precharge resistor in the precharge resistor branch is incorporated into the loop corresponding to the target battery cluster, so that the loop resistance corresponding to the target battery cluster may be adjusted, and thus the current corresponding to the target battery cluster may be adjusted. Because the total loop current of each battery cluster in the energy storage unit is fixed, the current of each battery cluster in the energy storage unit can be regulated by regulating the current corresponding to the target battery cluster, thereby realizing the equalization processing of the battery state parameters of each battery cluster.
In summary, in the embodiment of the application, in the process of charging and discharging the energy storage unit, the battery state parameters of each battery cluster connected in parallel in the energy storage unit are obtained. Further, under the condition that the battery state parameters of any battery cluster meet the preset balance condition, the pre-charge resistor branch corresponding to the target battery cluster in each battery cluster is controlled to be in a conducting state, so that the pre-charge resistor in the pre-charge resistor branch is integrated into the loop corresponding to the target battery cluster. Therefore, in the embodiment of the application, when the battery state parameters of any battery cluster are detected to meet the preset balance condition according to the battery state parameters of each battery cluster in the energy storage unit, the loop resistance value corresponding to the target battery cluster is adjusted by controlling the pre-charge resistance branch corresponding to the target battery cluster in each battery cluster to be in a conducting state, so that the current corresponding to the target battery cluster can be adjusted. The total loop current of each battery cluster in the energy storage unit is constant, so that the current adjustment of each battery cluster in the energy storage unit is realized. Compared with the related art, in the embodiment of the application, by adjusting the on-off state of the pre-charging resistor branch corresponding to the battery cluster in the energy storage unit, no additional equipment is needed, so that the adjustment cost can be saved, and the occupied space can be saved.
In some embodiments, on the basis of the above embodiments, description is made in an exemplary manner on determining the relevant content of the target battery cluster in the embodiments of the present application.
Fig. 5 is a flow chart of a battery state parameter balancing method according to another embodiment of the present application, and as shown in fig. 5, the method according to the embodiment of the present application may further include the following steps:
step S403, determining a target battery cluster from a plurality of battery clusters included in the energy storage unit according to the battery state parameters of each battery cluster when the battery state parameters of each battery cluster are determined to satisfy the preset balance condition.
In this step, when it is determined that the preset equalization condition is satisfied according to the battery state parameters of each battery cluster, the BMS may determine a preset equalization condition type satisfied by the energy storage unit according to the battery state parameters of each battery cluster in the energy storage unit, and determine a target battery cluster to be adjusted from a plurality of battery clusters included in the energy storage unit according to the preset equalization condition type satisfied by the energy storage unit. Wherein, the preset equalization condition type may include, but is not limited to: the energy storage unit is provided with a balancing condition type of a first battery cluster with battery state parameters larger than those of other battery clusters, or is provided with a balancing condition type of a second battery cluster with battery state parameters smaller than those of other battery clusters.
It should be understood that the first battery cluster, the second battery cluster, or the target battery cluster according to the embodiments of the present application are collectively referred to as a single battery cluster, or a plurality of battery clusters.
In one possible implementation manner, if the preset equalization condition type satisfied by the energy storage unit is an equalization condition type of a first battery cluster in which the battery state parameter is greater than the battery state parameters of other battery clusters in the energy storage unit, the BMS may determine the target battery cluster according to the other battery clusters except the first battery cluster in the plurality of battery clusters.
In this implementation manner, since the battery state parameter of the first battery cluster in the energy storage unit is greater than the battery state parameters of the other battery clusters, the BMS may perform the equalization processing by reducing the loop resistance of the other battery clusters, so that the BMS may determine the target battery cluster according to the other battery clusters except the first battery cluster among the plurality of battery clusters.
For example, the BMS may determine other battery clusters except the first battery cluster among the plurality of battery clusters as target battery clusters to be adjusted, so that the precharge resistor branch corresponding to the target battery cluster may be controlled to be switched to a conductive state, so that the precharge resistor in the precharge resistor branch is integrated into the loop corresponding to the target battery cluster, and the loop resistance corresponding to the target battery cluster is reduced, so that the current corresponding to the target battery cluster may be improved. Because the total loop current of each battery cluster in the energy storage unit is constant, the current corresponding to the first battery cluster can be reduced (which is equivalent to increasing the loop resistance of the first battery cluster) by increasing the current corresponding to the target battery cluster, thereby realizing the equalization processing of each battery cluster in the energy storage unit.
As yet another example, the BMS may determine a preset number of battery clusters having smaller battery state parameters among the other battery clusters except the first battery cluster among the plurality of battery clusters as target battery clusters to be adjusted.
In another possible implementation manner, if the preset equalization condition type satisfied by the energy storage unit is an equalization condition type of a second battery cluster in which the battery state parameter is smaller than the battery state parameters of other battery clusters in the energy storage unit, the BMS may determine the second battery cluster as the target battery cluster.
In this implementation manner, since the battery state parameter of the second battery cluster in the energy storage unit is smaller than the battery state parameters of other battery clusters, the BMS may perform the equalization processing by reducing the loop resistance of the second battery cluster, so that the BMS may determine the second battery cluster as the target battery cluster to be adjusted, so as to control the precharge resistor branch corresponding to the target battery cluster to be switched to the on state, so that the precharge resistor in the precharge resistor branch is integrated into the loop corresponding to the target battery cluster, and the loop resistance corresponding to the target battery cluster is reduced, thereby improving the current corresponding to the target battery cluster. Because the total loop current of each battery cluster in the energy storage unit is constant, the current corresponding to other battery clusters can be reduced (equivalent to increasing the loop resistance of other battery clusters) by increasing the current corresponding to the target battery cluster, thereby realizing the equalization processing of each battery cluster in the energy storage unit.
Of course, the BMS may determine the target battery cluster from among the plurality of battery clusters included in the energy storage unit in other manners according to the battery state parameters of each battery cluster.
In summary, in the embodiment of the present application, under the condition that the preset balance condition is determined to be satisfied according to the battery state parameters of each battery cluster, the target battery cluster to be adjusted is determined from the plurality of battery clusters included in the energy storage unit according to the battery state parameters of each battery cluster, so that the current adjustment of each battery cluster in the energy storage unit is realized by controlling the pre-charge resistor branch corresponding to the target battery cluster to be switched to the conducting state.
On the basis of the above-described embodiments, in the following embodiments of the present application, description will be made exemplarily on the content of the BMS determining whether a preset balance condition is satisfied according to the battery state parameters of each battery cluster.
In one possible implementation manner, determining whether a first battery cluster with a battery state parameter greater than that of other battery clusters exists according to the battery state parameter of each battery cluster; if so, determining that the preset balance condition is met.
In this implementation manner, the BMS may determine, according to the battery state parameters of each battery cluster in the energy storage unit, whether there is a first battery cluster in the energy storage unit in which the battery state parameters are greater than the battery state parameters of other battery clusters. If the first battery cluster with the battery state parameter larger than that of the other battery clusters exists in the energy storage unit, the BMS can determine that the energy storage unit meets the preset balance condition, namely the preset balance condition type met by the energy storage unit is the balance condition type of the first battery cluster with the battery state parameter larger than that of the other battery clusters exists in the energy storage unit.
For example, if there is a first battery cluster in the energy storage unit, where the battery state parameter is greater than the battery state parameters of other battery clusters, and the difference between the battery state parameters of the first battery cluster and the battery state parameters of other battery clusters in the energy storage unit is greater than a first preset difference threshold, the BMS may determine that the energy storage unit satisfies a preset equalization condition, that is, the type of the preset equalization condition satisfied by the energy storage unit is the type of the equalization condition of the first battery cluster in the energy storage unit, where the battery state parameter is greater than the battery state parameters of other battery clusters.
In another possible implementation manner, determining whether a second battery cluster with the battery state parameter smaller than that of other battery clusters exists according to the battery state parameter of each battery cluster; if so, determining that the preset balance condition is met.
In this implementation manner, the BMS may determine, according to the battery state parameters of each battery cluster in the energy storage unit, whether there is a second battery cluster in the energy storage unit whose battery state parameter is smaller than the battery state parameters of other battery clusters. If a second battery cluster with the battery state parameter smaller than that of the other battery clusters exists in the energy storage unit, the BMS can determine that the energy storage unit meets the preset balance condition, namely the preset balance condition type met by the energy storage unit is the balance condition type of the second battery cluster with the battery state parameter smaller than that of the other battery clusters exists in the energy storage unit.
For example, if there is a second battery cluster in the energy storage unit, where the battery state parameter is smaller than the battery state parameters of the other battery clusters, and the difference between the battery state parameters of the other battery clusters in the energy storage unit and the second battery cluster is greater than the first preset difference threshold, the BMS may determine that the energy storage unit satisfies the preset equalization condition, that is, the type of the preset equalization condition satisfied by the energy storage unit is the type of the equalization condition of the second battery cluster in which the battery state parameter is smaller than the battery state parameters of the other battery clusters in the energy storage unit.
Of course, the BMS may determine whether the preset balancing condition is satisfied in other manners according to the battery state parameters of each battery cluster.
In summary, in the embodiment of the present application, by determining whether the energy storage unit meets a preset equalization condition according to the magnitude relation of the battery state parameters of each battery cluster, whether the energy storage unit meets the preset equalization condition may be determined in real time, so that when the battery state parameters of any battery cluster meet the preset equalization condition, the pre-charge resistance branch corresponding to the target battery cluster may be controlled to be switched to a conducting state, so as to implement current regulation on each battery cluster in the energy storage unit.
In some embodiments, fig. 6 is a schematic flow chart of a battery state parameter balancing method according to another embodiment of the present application, and on the basis of the foregoing embodiments, in the embodiments of the present application, relevant contents in a case where it is determined that a preset balancing condition is not satisfied according to a battery state parameter of each battery cluster are exemplarily described. As shown in FIG. 6, the method of the embodiment of the application can further comprise the following steps
Step S404, when it is determined that the preset balance condition is not satisfied according to the battery state parameters of each battery cluster, the pre-charge resistor branch corresponding to the target battery cluster is controlled to be switched to the off state.
Exemplary, the case that the energy storage unit in the embodiment of the present application does not satisfy the preset equalization condition may include, but is not limited to: the battery state parameters of each battery cluster in the energy storage unit may be equal, or the battery state parameter difference between different battery clusters may be less than a second preset difference threshold, where the second preset difference threshold is less than the first preset difference threshold.
In this step, when it is determined that the energy storage unit does not meet the preset balance condition according to the battery state parameters of each battery cluster, the BMS may control the precharge resistor branch corresponding to the target battery cluster to be switched to the off state, so that the precharge resistor in the precharge resistor branch is not incorporated into the loop corresponding to the target battery cluster, so that the loop resistance corresponding to the target battery cluster (i.e., the impedance of the direct charging branch corresponding to the target battery cluster) may be recovered, thereby facilitating saving the energy loss of the energy storage unit.
In some embodiments, on the basis of the above embodiments, the description will be given for the related content of "controlling the precharge resistor branch corresponding to the target battery cluster in each battery cluster to be switched to the on state" in the above step S402.
For example, in the case that the target battery cluster includes a plurality of target battery clusters, the BMS may control the precharge resistor branches corresponding to the target battery clusters to be switched to the on state according to a preset on rule according to the battery state parameters of the target battery clusters. The preset conduction rule may be used to instruct that the precharge resistor branches corresponding to the target battery cluster are sequentially controlled to be switched into a conduction state according to the order of the battery state parameters from small to large, or the preset conduction rule may be used to instruct that the duration of the conduction state is inversely related to the size of the battery state parameters of the target battery cluster.
As an example, assuming that the energy storage unit includes a battery cluster 1, a battery cluster 2, a battery cluster 3, and a battery cluster 4, wherein the battery state parameter of the battery cluster 1 is a reference state parameter, the battery state parameter of the battery cluster 2 is 5% smaller than the battery state parameter of the battery cluster 1, the battery state parameter of the battery cluster 3 is 8% smaller than the battery state parameter of the battery cluster 1, and the battery state parameter of the battery cluster 4 is 10% smaller than the battery state parameter of the battery cluster 1, the BMS may sequentially control the precharge resistor branch corresponding to the battery cluster 4 to be switched to the on state, the precharge resistor branch corresponding to the battery cluster 3 to be switched to the on state, and the precharge resistor branch corresponding to the battery cluster 2 to be switched to the on state in order of the battery state parameters from small to large according to a preset on rule.
Still another example, assuming that the energy storage unit includes a battery cluster 1, a battery cluster 2, a battery cluster 3, and a battery cluster 4, wherein the battery state parameter of the battery cluster 1 is a reference state parameter, the battery state parameter of the battery cluster 2 is 5% smaller than the battery state parameter of the battery cluster 1, the battery state parameter of the battery cluster 3 is 8% smaller than the battery state parameter of the battery cluster 1, and the battery state parameter of the battery cluster 4 is 10% smaller than the battery state parameter of the battery cluster 1, the BMS may control the duration that the precharge resistor branch corresponding to the battery cluster 4 is in the on state to be greater than the duration that the precharge resistor branch corresponding to the battery cluster 3 is in the on state, and the duration that the precharge resistor branch corresponding to the battery cluster 3 is in the on state to be greater than the duration that the precharge resistor branch corresponding to the battery cluster 2 is in the on state according to a preset on rule.
Of course, the BMS may also control the precharge resistor branch corresponding to the target battery cluster in each battery cluster to be switched to the on state in other manners.
In summary, in the embodiment of the present application, when the target battery cluster includes a plurality of target battery clusters, by controlling the pre-charge resistor branch corresponding to each target battery cluster to be switched to the on state according to the preset on rule according to the battery state parameters of each target battery cluster, the loop resistance value corresponding to each target battery cluster can be more effectively and reasonably adjusted, which is beneficial to more effectively and reasonably adjusting the current of each battery cluster in the energy storage unit, thereby being beneficial to further saving the energy consumption of the energy storage unit on the basis of realizing the equalization processing of the battery state parameters of each battery cluster.
It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
In some embodiments, fig. 7 is a schematic diagram of a second structure of an energy storage unit according to an embodiment of the present application, and on the basis of the above embodiments, an overall structure of the energy storage unit is described in the embodiment of the present application. As shown in fig. 7, the energy storage unit according to the embodiment of the present application may include, but is not limited to: the BMS 701 and a plurality of battery clusters 704 respectively connected to the bus line 703 through corresponding charge and discharge control circuits 702. It should be understood that the BMS may be provided in the energy storage unit or may be provided outside the energy storage unit.
Illustratively, the charge-discharge control circuit 702 may include, but is not limited to, a pre-charge resistive leg and a direct-charge leg in parallel, wherein the pre-charge resistive leg has an impedance greater than an impedance of the direct-charge leg, and the direct-charge leg is in a normally-on state during a current charge-discharge process.
The BMS 701 is configured to obtain a battery state parameter of each battery cluster 704 in the energy storage unit during a charging and discharging process of the energy storage unit, and control a precharge resistor branch corresponding to a target battery cluster in each battery cluster 704 to be switched to a conducting state when it is determined that a preset equalization condition is met according to the battery state parameter of each battery cluster 704.
In some embodiments, BMS 701 is further to:
and under the condition that the preset balance condition is met according to the battery state parameters of each battery cluster, determining the target battery cluster from the battery clusters included in the energy storage unit according to the battery state parameters of each battery cluster.
In some embodiments, BMS 701 is further to:
determining whether a first battery cluster with the battery state parameters larger than those of other battery clusters exists according to the battery state parameters of each battery cluster;
if so, determining that the preset balance condition is met.
In some embodiments, BMS 701 is specifically configured to:
And determining the target battery cluster according to the other battery clusters except the first battery cluster in the plurality of battery clusters.
In some embodiments, BMS 701 is further to:
determining whether a second battery cluster with the battery state parameters smaller than those of other battery clusters exists according to the battery state parameters of each battery cluster;
if so, determining that the preset balance condition is met.
In some embodiments, BMS 701 is specifically configured to:
and determining the second battery cluster as a target battery cluster.
In some embodiments, BMS 701 is specifically configured to:
under the condition that the target battery clusters comprise a plurality of target battery clusters, according to battery state parameters of each target battery cluster, the pre-charge resistor branch corresponding to each target battery cluster is controlled to be switched into a conducting state according to a preset conducting rule.
In some embodiments, the preset conduction rule is used to indicate that the duration of the conduction state is inversely related to the magnitude of the battery state parameter of the target battery cluster.
In some embodiments, BMS 701 is further to:
and under the condition that the preset balance condition is not met according to the battery state parameters of each battery cluster, controlling the pre-charge resistor branch corresponding to the target battery cluster to be switched into the disconnected state.
The BMS in the energy storage unit provided in the embodiment of the present application may be used to execute the technical scheme in the embodiment of the battery state parameter balancing method of the present application, and its implementation principle and technical effects are similar, and are not repeated here.
In some embodiments, a BMS is further provided, which may include a memory and a processor, where the memory stores a computer program, and the processor implements the technical solution in the above-mentioned battery state parameter balancing method embodiment of the present application when executing the computer program, and the implementation principle and technical effects are similar, and are not repeated herein.
In some embodiments, a computer readable storage medium is provided, on which a computer program is stored, where the computer program when executed by a processor implements the technical solution in the above-mentioned battery state parameter balancing method embodiment of the present application, and the implementation principle and technical effects are similar, and are not repeated herein.
In some embodiments, a computer program product is also provided, where the computer program is implemented by a processor to implement the technical solution in the above-mentioned battery state parameter balancing method embodiment of the present application, and the implementation principle and technical effects are similar, and are not repeated herein.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as Static Random access memory (Static Random access memory AccessMemory, SRAM) or dynamic Random access memory (Dynamic Random Access Memory, DRAM), and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (12)
1. A method for balancing battery state parameters, the method comprising:
in the process of charging and discharging an energy storage unit, acquiring battery state parameters of each battery cluster in the energy storage unit, wherein the energy storage unit comprises a plurality of battery clusters, each battery cluster is connected into a bus line through a corresponding charging and discharging control circuit, the charging and discharging control circuit comprises a pre-charging resistance branch and a direct charging branch which are connected in parallel, the impedance of the pre-charging resistance branch is larger than that of the direct charging branch, and the direct charging branch is in a normally-on state in the current charging and discharging process;
And under the condition that the preset balance condition is met according to the battery state parameters of each battery cluster, controlling the pre-charge resistor branch corresponding to the target battery cluster in each battery cluster to be switched into a conducting state.
2. The method according to claim 1, wherein the method further comprises:
and determining the target battery cluster from the battery clusters included in the energy storage unit according to the battery state parameters of each battery cluster under the condition that the preset balance condition is met according to the battery state parameters of each battery cluster.
3. The method according to claim 2, wherein the method further comprises:
determining whether a first battery cluster with the battery state parameters larger than those of other battery clusters exists according to the battery state parameters of each battery cluster;
and if so, determining that the preset balance condition is met.
4. The method of claim 3, wherein the determining the target battery cluster from among the plurality of battery clusters included in the energy storage unit according to the battery state parameter of each of the battery clusters comprises:
and determining the target battery cluster according to other battery clusters except the first battery cluster in the plurality of battery clusters.
5. The method according to claim 2, wherein the method further comprises:
determining whether a second battery cluster with the battery state parameters smaller than those of other battery clusters exists according to the battery state parameters of each battery cluster;
and if so, determining that the preset balance condition is met.
6. The method of claim 5, wherein the determining the target battery cluster from among the plurality of battery clusters included in the energy storage unit according to the battery state parameter of each battery cluster comprises:
and determining the second battery cluster as the target battery cluster.
7. The method according to any one of claims 1-6, wherein controlling the switching of the precharge resistor branch corresponding to the target battery cluster in each battery cluster to the on state includes:
and under the condition that the target battery clusters comprise a plurality of target battery clusters, controlling the pre-charge resistor branch circuits corresponding to the target battery clusters to be switched into a conducting state according to the battery state parameters of the target battery clusters and a preset conducting rule.
8. The method of claim 7, wherein the preset conduction rule indicates that a duration of a conduction state is inversely related to a magnitude of a battery state parameter of the target battery cluster.
9. The method according to any one of claims 1-6, further comprising:
and under the condition that the preset balance condition is not met according to the battery state parameters of each battery cluster, controlling the pre-charge resistor branch corresponding to the target battery cluster to be switched into the disconnected state.
10. An energy storage unit, the energy storage unit comprising: the battery management system BMS and a plurality of battery clusters which are connected into the bus bar line through corresponding charge and discharge control circuits respectively; the charge-discharge control circuit comprises a pre-charge resistance branch and a direct-charge branch which are connected in parallel, wherein the impedance of the pre-charge resistance branch is larger than that of the direct-charge branch, and the direct-charge branch is in a normally-on state in the current charge-discharge process;
the BMS is used for acquiring battery state parameters of each battery cluster in the energy storage unit in the charging and discharging process of the energy storage unit, and controlling the pre-charge resistor branch corresponding to the target battery cluster in each battery cluster to be switched into a conducting state under the condition that the preset balance condition is determined to be met according to the battery state parameters of each battery cluster.
11. BMS comprising a memory and a processor, said memory storing a computer program, characterized in that said processor implements the steps of the method according to any of claims 1-10 when said computer program is executed.
12. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311414499.6A CN117175748B (en) | 2023-10-30 | 2023-10-30 | Battery state parameter balancing method, energy storage unit, BMS and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311414499.6A CN117175748B (en) | 2023-10-30 | 2023-10-30 | Battery state parameter balancing method, energy storage unit, BMS and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117175748A true CN117175748A (en) | 2023-12-05 |
| CN117175748B CN117175748B (en) | 2024-04-02 |
Family
ID=88941626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311414499.6A Active CN117175748B (en) | 2023-10-30 | 2023-10-30 | Battery state parameter balancing method, energy storage unit, BMS and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117175748B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2349611A1 (en) * | 1998-11-12 | 2000-05-25 | Fronius Schweissmaschinen Produktion Gmbh & Co. Kg | Voltage switch-over device |
| CN108336783A (en) * | 2018-02-05 | 2018-07-27 | 北京海博思创科技有限公司 | The control method of voltage difference between energy-storage system and battery cluster |
| US20210146792A1 (en) * | 2017-06-15 | 2021-05-20 | The Governing Council Of The University Of Toronto | Constant current fast charging of electric vehicles via dc grid using dual inverter drive |
| CN113595180A (en) * | 2021-07-16 | 2021-11-02 | 风帆有限责任公司 | Power battery device |
| CN115986878A (en) * | 2022-12-30 | 2023-04-18 | 湖北亿纬动力有限公司 | Balance system for local energy transfer and control method thereof |
-
2023
- 2023-10-30 CN CN202311414499.6A patent/CN117175748B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2349611A1 (en) * | 1998-11-12 | 2000-05-25 | Fronius Schweissmaschinen Produktion Gmbh & Co. Kg | Voltage switch-over device |
| US20210146792A1 (en) * | 2017-06-15 | 2021-05-20 | The Governing Council Of The University Of Toronto | Constant current fast charging of electric vehicles via dc grid using dual inverter drive |
| CN108336783A (en) * | 2018-02-05 | 2018-07-27 | 北京海博思创科技有限公司 | The control method of voltage difference between energy-storage system and battery cluster |
| CN113595180A (en) * | 2021-07-16 | 2021-11-02 | 风帆有限责任公司 | Power battery device |
| CN115986878A (en) * | 2022-12-30 | 2023-04-18 | 湖北亿纬动力有限公司 | Balance system for local energy transfer and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117175748B (en) | 2024-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104993602A (en) | Modular energy storage system | |
| WO2012147121A1 (en) | Cell pack | |
| CN109950942A (en) | Battery core balance in battery | |
| JP2010273519A (en) | Method of controlling charging and discharging | |
| CN104810891B (en) | Battery pack with standby unit and dynamic management method of battery pack | |
| JP6439866B2 (en) | Power storage device and connection control method | |
| JP7136424B2 (en) | Apparatus and method for controlling turn-on operation of switch unit included in parallel multi-battery pack | |
| JP5314626B2 (en) | Power supply system, discharge control method, and discharge control program | |
| CN216659649U (en) | Formation and capacitance circuit, equipment and system | |
| CN109802454B (en) | Battery pack balance control method and device | |
| US10199841B2 (en) | System and method for protecting energy storage systems from overcurrent conditions | |
| CN115800418B (en) | Battery control method, energy storage system, device, computer equipment and storage medium | |
| CN117175748B (en) | Battery state parameter balancing method, energy storage unit, BMS and storage medium | |
| CN116526635B (en) | Electric quantity balancing method of battery system, battery system and battery management system | |
| CN115800417B (en) | Battery control method, energy storage system, device, computer equipment and storage medium | |
| CN112993418B (en) | Energy storage system | |
| CN104247195A (en) | A battery energy storage, battery energy storage system, method, computer program and computer program product | |
| JP2019106816A (en) | Electrical power system | |
| CN204597550U (en) | A kind of battery pack with stand-by unit | |
| CN204835716U (en) | Modular energy storage system | |
| CN115986883A (en) | Energy storage system and control method thereof | |
| Wu et al. | SOC-featured distributed tertiary control for energy management in DC Microgrid clusters | |
| CN114649854A (en) | Battery energy storage network, method, system and device for balancing residual electric quantity among batteries | |
| CN114597941A (en) | Modular energy storage converter, control method and device and electronic equipment | |
| CN110600819B (en) | Electric quantity balance control system and method of battery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |