CN209930016U - Energy storage power station - Google Patents
Energy storage power station Download PDFInfo
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- CN209930016U CN209930016U CN201921100183.9U CN201921100183U CN209930016U CN 209930016 U CN209930016 U CN 209930016U CN 201921100183 U CN201921100183 U CN 201921100183U CN 209930016 U CN209930016 U CN 209930016U
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Abstract
The embodiment of the utility model discloses an energy storage power station, the energy storage power station includes a plurality of constant volume modules and at least one increase-volume module, and at least one increase-volume module is parallelly connected with the constant volume module and is set up; the capacity-increasing module comprises a capacity-increasing battery pack and a capacity-increasing battery pack protection unit; the constant volume module comprises a constant volume battery pack and a constant volume battery pack protection unit; the rated working voltage U1 of the capacity-increasing battery pack protection unit and the rated working voltage U2 of the capacity-fixing battery pack protection unit meet the condition that U1 is equal to U2; the rated working current I1 of the capacity-increased battery pack protection unit meets the condition that I1 is U1/R1, and R1 is the resistance value of the capacity-increased battery pack. By adopting the technical scheme, the rated working voltage and the rated working current of the capacity-increasing battery pack protection unit are reasonably set, so that the capacity-increasing scheme of the energy storage power station can be realized, the safety of the energy storage power station can be ensured, and the capacity-increasing scheme of the energy storage power station is feasible.
Description
Technical Field
The embodiment of the utility model provides an energy storage technical field especially relates to an energy storage power station.
Background
The energy storage is an important component and a key supporting technology of a smart grid, a renewable energy high-occupancy energy system and an energy internet. The electrochemical energy storage technology represented by lithium batteries, lead-acid batteries and liquid flows is developed and matured continuously, and the electrochemical energy storage technology has the widest application range and the greatest development potential. Currently, the development of global energy storage technology is mainly focused on the field of electrochemical energy storage. China already completes the construction and operation of a plurality of electrochemical energy storage power stations.
In the operation process of an electrochemical energy storage power station, due to the reason that an energy storage battery in the energy storage power station is periodically circulated and aged, the maximum available capacity of the energy storage battery can be gradually reduced, so that the capacity of the power station is reduced, the capacity of the power station at the initial construction stage cannot be reached, and the actual performance of the power station is further influenced. For this reason, the batteries of the energy storage power station need to be replaced or new batteries need to be supplemented to maintain the performance of the energy storage power station.
Due to the inherent characteristics of the energy storage battery, the mismatching of the new battery and the old battery can cause potential safety hazards. The new and old batteries are directly connected in parallel: during discharging, the discharging current of the new battery pack and the old battery pack is unbalanced, the new battery pack provides large current, the old battery provides small current, and the aging of the new battery is accelerated by over-discharging of the new battery, so that the new battery is easily damaged; during charging, because the internal resistance of the old battery is relatively high, a plurality of groups of equally-divided charging currents are excessively loaded on the new battery pack with low internal resistance, so that the old battery is insufficiently charged, the new battery pack is overcharged, and the battery is damaged. The new and old batteries are directly connected in series: during discharging, because the capacity of the new battery is larger than that of the old battery, the old battery is easy to generate excessive power during discharging, and the battery is seriously reversed, thereby causing accidents. During charging, the internal resistance of the old battery is relatively large, and the internal resistance of the new battery is relatively small, so that the new battery is not fully charged, the old battery is too high, the overvoltage of the old battery is caused, and the battery is damaged.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides an energy storage power station to solve among the prior art because of the improper technical problem who causes energy storage power station increase-volume difficulty of new and old battery configuration in the energy storage power station increase-volume process.
The embodiment of the utility model provides an energy storage power station, including a plurality of constant volume modules and at least one increase-volume module, at least one increase-volume module with the parallelly connected setting of constant volume module;
the capacity-increasing module comprises a capacity-increasing battery pack and a capacity-increasing battery pack protection unit; the constant volume module comprises a constant volume battery pack and a constant volume battery pack protection unit;
the rated working voltage U1 of the capacity-increased battery pack protection unit and the rated working voltage U2 of the capacity-increased battery pack protection unit meet the condition that U1 is equal to U2;
the rated working current I1 of the protection unit of the compatibilized battery pack meets the condition that I1 is U1/R1, and R1 is the resistance value of the compatibilized battery pack.
Optionally, the capacity-increasing battery pack protection unit includes a capacity-increasing fuse, a capacity-increasing contactor, and a capacity-increasing circuit breaker;
the capacity-increased battery pack comprises a first signal terminal and a second signal terminal; the capacity-increasing breaker comprises a first control switch and a second control switch;
the first signal end is electrically connected with the first control switch sequentially through the capacity-increasing fuse and the capacity-increasing contactor;
the second signal end is electrically connected with the second control switch.
Optionally, the constant-volume battery pack protection unit comprises a constant-volume fuse, a constant-volume contactor and a constant-volume circuit breaker;
the rated working voltage U11 of the capacity-increasing fuse and the rated working voltage U21 of the constant volume fuse meet the condition that U11 is equal to U21; the rated working current I11 of the capacity-increasing fuse meets the condition that I11 is U11/R1, and R1 is the resistance value of the capacity-increasing battery pack;
the rated working voltage U12 of the capacity-increasing contactor and the rated working voltage U22 of the constant-volume contactor meet the condition that U12 is equal to U22; the rated working current I12 of the capacity-increasing contactor meets the condition that I12 is U12/R1, and R1 is the resistance value of the capacity-increasing battery pack;
the rated working voltage U13 of the capacity-increasing circuit breaker and the rated working voltage U23 of the capacity-increasing circuit breaker meet the condition that U13 is equal to U23; the rated working current I13 of the capacity-increasing breaker meets the condition that I13 is U13/R1, and R1 is the resistance value of the capacity-increasing battery pack.
Optionally, the compatibilization module further comprises a compatibilized cable;
the first signal end is electrically connected with the capacity-increasing fuse through the capacity-increasing cable;
the capacity-increasing fuse is electrically connected with the capacity-increasing contactor through the capacity-increasing cable;
the capacity-increasing contactor is electrically connected with the first control switch through the capacity-increasing cable;
the second signal end is electrically connected with the second control switch through the capacity-increasing cable;
the current-carrying capacity I2 of the compatibilized cable and the rated working current I1 of the compatibilized battery protection unit meet the condition that I2 is not less than I1.
Optionally, the capacity-increased battery pack includes a plurality of capacity-increased battery clusters, and the constant-volume battery pack includes a plurality of constant-volume battery clusters;
the type selection of the capacity-increased battery cluster is the same as that of the constant-volume battery cluster;
the number n1 of the compatibilized battery clusters and the number n2 of the constant volume battery clusters meet the condition that n1 is n 2;
the connection mode of the capacity-increased battery clusters is the same as that of the capacity-fixed battery clusters.
Optionally, the capacity-increasing module further includes a plurality of capacity-increasing battery cluster management units and capacity-increasing battery pack management units;
the capacity-increased battery cluster management units correspond to the capacity-increased battery clusters one by one and are in communication connection;
and the plurality of capacity-increased battery cluster management units are in communication connection with the capacity-increased battery pack management unit.
Optionally, the constant volume module further includes a constant volume battery cluster management unit and a constant volume battery pack management unit;
the capacity-increased battery cluster management unit and the constant-volume battery cluster management unit have the same working parameters;
the capacity-increasing battery pack management unit and the constant-volume battery pack management unit have the same working parameters.
Optionally, the energy storage power station further includes a battery management module and an energy storage current device;
the capacity-increasing battery pack management unit and the constant-volume battery pack management unit are in communication connection with the battery management module;
the battery management module is in communication connection with the energy storage current device.
Optionally, the battery management module further includes at least one capacity expansion interface;
and the capacity-increasing battery pack management unit is in communication connection with the battery management module through the capacity-increasing interface.
The embodiment of the utility model provides an energy storage power station includes a plurality of constant volume modules and at least one increase-volume module, and at least one increase-volume module is parallelly connected with constant volume module and is set up; the capacity-increasing module comprises a capacity-increasing battery pack and a capacity-increasing battery pack protection unit, and the constant volume module comprises a constant volume battery pack and a constant volume battery pack protection unit; the rated working voltage U1 of the capacity-increasing battery pack protection unit and the rated working voltage U2 of the capacity-fixing battery pack protection unit are set to meet the condition that U1 is equal to U2; the rated working current I1 of the capacity-increasing battery pack protection unit meets the condition that I1 is U1/R1, the rated working voltage and the rated working current of the capacity-increasing battery pack protection unit are reasonably set, the safety of the energy storage power station is ensured on the premise of capacity increase of the energy storage power station, the capacity-increasing scheme is feasible, and the technical problem that the capacity increase of the energy storage power station is difficult due to improper configuration of new and old batteries in the capacity-increasing process of the energy storage power station in the prior art is solved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural diagram of an energy management system of an energy storage power station according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a capacity increasing method for an energy storage power station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail through the following embodiments with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention all fall into the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an energy management system of an energy storage power station provided in an embodiment of the present invention, as shown in fig. 1, an energy storage power station provided in an embodiment of the present invention includes a plurality of constant volume modules 10 and at least one capacity increasing module 20, where the at least one capacity increasing module 20 is connected in parallel with the constant volume modules 10;
the compatibilization module 20 comprises a compatibilized battery 21 and a compatibilized battery protection unit 22; the constant volume module 10 comprises a constant volume battery pack 11 and a constant volume battery pack protection unit 12;
the rated working voltage U1 of the capacity-increased battery pack protection unit 22 and the rated working voltage U2 of the capacity-fixed battery pack protection unit 12 meet the condition that U1 is equal to U2;
the rated operating current I1 of the capacity-increased battery pack protection unit 22 meets the requirement that I1 is U1/R1, and R1 is the resistance value of the capacity-increased battery pack 21.
Optionally, the embodiment of the utility model provides an increase-volume can be understood as increasing the electric energy storage capacity of energy storage power station. When the energy storage power station needs the increase-volume, if set up increase-volume module 20 and constant volume module 10 and establish ties when setting up, the difficult control of stability has great potential safety hazard, consequently the embodiment of the utility model provides a set up increase-volume module 20 and the parallelly connected setting of constant volume module 10, guarantee that energy storage power station stability is higher, the security is higher.
Specifically, the compatibilized module 20 includes a compatibilized battery pack 21 and a compatibilized battery pack protection unit 22, and the compatibilized battery pack protection unit 22 is used for protecting the compatibilized battery pack 21 during the discharging and charging processes of the compatibilized battery pack 21. The embodiment of the utility model provides an in, because increase-volume module 20 and the parallelly connected setting of constant volume module 10, increase-volume battery pack protection unit 22 in the increase-volume module 20 and the parallelly connected setting of constant volume battery pack protection unit 12 in the constant volume module 10, consequently set up increase-volume battery pack protection unit 22 and satisfy U1 ═ U2 with the rated operating voltage U2 of constant volume battery pack protection unit 12 under rated operating condition, it sets up simply to guarantee increase-volume battery pack protection unit 22, only need set up increase-volume battery pack protection unit 22 and the parallelly connected setting of constant volume battery pack protection unit 12 can.
Furthermore, because the constant-volume battery pack 11 is used for a long time and the conductive material is lost, the internal resistance of the constant-volume battery pack 11 is larger than the internal resistance of the newly added capacity-increased battery pack 21, and meanwhile, because the rated working voltage U1 of the capacity-increased battery pack protection unit 22 and the rated working voltage U2 of the constant-volume battery pack protection unit 12 meet the requirement that U1 is equal to U2, under the charging and discharging working condition, the capacity-increased battery pack 21 is easy to be overcharged and overdischarged, and the capacity-increased battery pack 21 is damaged. Therefore, the embodiment of the utility model provides a creative rated operating current who sets up increase-volume battery pack protection unit 22 is confirmed according to the maximum current that increase-volume battery pack 21's rated operating condition probably flowed, increase-volume battery pack protection unit 22's rated operating current I1 satisfies I1 ═ U1/R1 promptly, R1 is the resistance value of increase-volume battery pack, guarantee that increase-volume battery pack protection unit 22 can protect increase-volume battery pack 21, avoid increase-volume battery pack 21 to take place the condition of overcharging and overdischarging, guarantee increase-volume battery pack 21 job stabilization, and then guarantee that whole energy storage power station guarantees under the condition of realizing the increase-volume that operating condition is stable, realize the purpose of safe increase-volume. Specifically, when the discharge current of the capacity-increased battery pack 21 is greater than U1/R1, the capacity-increased battery pack protection unit 22 is disconnected, so as to avoid the over-discharge of the capacity-increased battery pack 21; when the charging current of the compatibilized battery pack 21 is greater than U1/R1, the compatibilized battery pack protection unit 22 is disconnected, the overcharging of the compatibilized battery pack 21 is avoided, the stable operation of the compatibilized battery pack 21 is ensured, and the service life of the compatibilized battery pack 21 is prolonged.
It is noted that, the embodiment of the utility model provides an in the energy storage power station, can set up a plurality of increase-volume modules 20 according to actual increase-volume needs, the embodiment of the utility model provides an only explain as an example with one increase-volume module 20, and it is not right the embodiment of the utility model provides a limit.
Optionally, with continuing reference to fig. 1, the capacity-increasing battery pack protection unit 22 provided in the embodiment of the present invention includes a capacity-increasing fuse 221, a capacity-increasing contactor 222, and a capacity-increasing circuit breaker 223;
the compatibilized battery pack 21 includes a first signal terminal 211 and a second signal terminal 212; the capacity-increasing circuit breaker 223 includes a first control switch 2231 and a second control switch 2232;
the first signal terminal 211 is electrically connected to the first control switch 2231 through the compatibilization fuse 221 and the compatibilization contactor 222 in sequence;
the second signal terminal 212 is electrically connected to the second control switch 2232.
Specifically, the capacity-increasing battery pack protection unit 22 may include a capacity-increasing fuse 221, a capacity-increasing contactor 222, and a capacity-increasing circuit breaker 223, the capacity-increasing circuit breaker 223 may further include a first control switch 2231 and a second control switch 2232, the first signal terminal 211 of the capacity-increasing battery pack 21 sequentially passes through the capacity-increasing fuse 221, the capacity-increasing contactor 222, and the first control switch 2231 to access the bus, the second signal terminal 212 accesses the bus through the capacity-increasing second control switch 2232, and the capacity-increasing battery pack 21 discharges electricity to the outside or receives external current to charge electricity. When the discharge current of the capacity-increasing battery pack 21 is greater than U1/R1, the capacity-increasing fuse 221 is blown, and/or the capacity-increasing contactor 222 is disconnected, and/or the first control switch 2231 is disconnected, and/or the second control switch 2232 is disconnected, and the discharge path of the capacity-increasing battery pack 21 is disconnected, so that the capacity-increasing battery pack 21 is prevented from over-discharging. Meanwhile, when the charging current of the compatibilized battery pack 21 is greater than U1/R1, the compatibilized fuse 221 blows, and/or the compatibilized contactor 222 is disconnected, and/or the first control switch 2231 is disconnected, and/or the second control switch 2232 is disconnected, so that the charging path of the compatibilized battery pack 21 is disconnected, and the overcharging of the compatibilized battery pack 21 is avoided. The rated working current I1 of the capacity-increased battery pack protection unit 22 is set to satisfy the condition that I1 is U1/R1, meanwhile, the capacity-increased battery pack protection unit 22 comprises a capacity-increased fuse 221, a capacity-increased contactor 222 and a capacity-increased breaker 223, a multilayer overcharge and over-discharge protection device is arranged for the capacity-increased battery pack 21, the working stability of the capacity-increased battery pack 21 is fully guaranteed, the service life of the capacity-increased battery pack 21 is prolonged, and the purpose of safe capacity increase of an energy storage power station is further achieved.
Further, the constant volume battery pack protection unit comprises a constant volume fuse 121, a constant volume contactor 122 and a constant volume breaker 123;
the rated working voltage U11 of the capacity-increasing fuse 221 and the rated working voltage U21 of the constant volume fuse 121 meet the condition that U11 is equal to U21; the rated operating current I11 of the capacity-increasing fuse 221 satisfies I11 ═ U11/R1, and R1 is the resistance value of the capacity-increasing battery pack 21;
the rated working voltage U12 of the capacity-increasing contactor 222 and the rated working voltage U22 of the constant-volume contactor 122 meet the condition that U12 is equal to U22; the rated operating current I12 of the capacity-increasing contactor 222 meets the requirement that I12 is U12/R1, and R1 is the resistance value of the capacity-increasing battery pack 21;
the rated working voltage U13 of the capacity-increasing circuit breaker 223 and the rated working voltage U23 of the constant-volume circuit breaker 123 meet the condition that U13 is equal to U23; the rated operating current I13 of the capacity-increasing breaker 223 satisfies I13 ═ U13/R1, and R1 is the resistance value of the capacity-increasing battery pack 21.
Specifically, since the capacity-increasing fuse 221 is disposed corresponding to the fixed-volume fuse 121, the rated operating voltage U11 of the capacity-increasing fuse 221 and the rated operating voltage U21 of the fixed-volume fuse 121 can satisfy the condition that U11 is equal to U21, and the operating states of the capacity-increasing fuse 221 and the fixed-volume fuse 121 are the same. Further, the rated operating current I11 of the capacity-increasing fuse 221 satisfies I11 ═ U11/R1, R1 is the resistance value of the capacity-increasing battery pack 21, and when the discharging current and/or the charging current of the capacity-increasing battery pack 21 is greater than U11/R1, the capacity-increasing fuse 221 blows.
Because the capacity-increasing contactor 222 is arranged corresponding to the constant-volume contactor 122, the rated operating voltage U12 of the capacity-increasing contactor 222 and the rated operating voltage U22 of the constant-volume contactor 122 can meet the condition that U12 is equal to U22, and the same operating states of the capacity-increasing contactor 222 and the constant-volume contactor 122 are ensured. Furthermore, the rated operating current I12 of the capacity-increasing contactor 222 satisfies that I12 is U12/R1, R1 is the resistance value of the capacity-increasing battery pack 21, and when the discharging current and/or the charging current of the capacity-increasing battery pack 21 is greater than U12/R1, the capacity-increasing contactor 222 blows out.
Because the capacity-increasing breaker 223 and the constant volume breaker 123 are correspondingly arranged, the rated working voltage U13 of the capacity-increasing breaker 223 and the rated working voltage U23 of the constant volume breaker 123 can meet the condition that U13 is equal to U23, and the working states of the capacity-increasing breaker 223 and the constant volume breaker 123 are the same. Further, the rated operating current I13 of the capacity-increasing breaker 223 satisfies that I13 is U13/R1, R1 is the resistance value of the capacity-increasing battery pack 21, and when the discharging current and/or the charging current of the capacity-increasing battery pack 21 is greater than U13/R1, the capacity-increasing breaker 223 blows out.
In summary, by reasonably setting the rated working voltage and the rated working current of the capacity-increasing fuse 221, the capacity-increasing contactor 222 and the capacity-increasing breaker 223, a multilayer overcharge and overdischarge protection device is provided for the capacity-increasing battery pack 21, so that the stable operation of the capacity-increasing battery pack 21 is fully ensured, the service life of the capacity-increasing battery pack 21 is prolonged, and the purpose of safe capacity increase of the energy storage power station is further achieved.
Optionally, with continuing reference to fig. 1, the energy storage power station provided in the embodiment of the present invention further includes a capacity-increasing cable 23; the first signal terminal 211 is electrically connected to the capacity increasing fuse 221 through the capacity increasing cable 23; the capacity-increasing fuse 221 is electrically connected to the capacity-increasing contactor 222 through the capacity-increasing cable 23; the capacity-increasing contactor 222 is electrically connected to the first control switch 2231 through the capacity-increasing cable 23; the second signal terminal 212 is electrically connected to the second control switch 2232 through the capacity-increasing cable 23; the current capacity I2 of the capacity-increased cable 23 and the rated working current I1 of the capacity-increased battery protection unit 22 meet the condition that I2 is not less than I1.
Exemplarily, the embodiment of the utility model provides an energy storage power station still includes increase-volume cable 23, and increase-volume cable 23 specifically can regard as between increase-volume battery pack 21 and the increase-volume battery pack protection unit 22 and the inside connecting cable of increase-volume battery pack protection unit 22, guarantees that the discharge current of increase-volume battery pack 21 output and the charging current who flows in increase-volume battery pack 21 can normal transmission. Specifically, the first signal terminal 211 and the capacity increasing fuse 221, the capacity increasing fuse 221 and the capacity increasing contactor 222, the capacity increasing contactor 222 and the first control switch 2231, and the second signal terminal 212 and the second control switch 2232 are all required to be electrically connected through the capacity increasing cable 23, so as to ensure normal transmission of signals. Further, in order to ensure that the discharging current output by the compatibilized battery pack 21 and the charging current flowing into the compatibilized battery pack 21 can be normally transmitted, the current-carrying capacity I2 of the compatibilized cable 23 and the rated working current I1 of the compatibilized battery protection unit 22 are required to meet the requirement that I2 is not less than I1, so that the compatibilized cable 23 can be ensured to normally work, and the situation that the normal work of the energy storage power station is influenced due to the fact that the small current-carrying capacity of the compatibilized cable 23 is set to burn the compatibilized cable 23 is avoided.
Optionally, with continued reference to fig. 1, the capacity-increased battery pack 21 in the energy storage power station provided in the embodiment of the present invention may include a plurality of capacity-increased battery clusters 213; the constant-volume battery pack 11 comprises a plurality of constant-volume battery clusters 113; wherein, the model selection of the capacity-increasing battery cluster 213 is the same as the model selection of the constant volume battery cluster 113; the number n1 of the compatibilized battery clusters 213 and the number n2 of the constant volume battery clusters 113 satisfy n 1-n 2; the connection mode of the plurality of capacity-increased cell clusters 213 is the same as that of the plurality of capacity-fixed cell clusters 113.
For example, when the energy storage power station is increased in capacity, the capacity-increased battery cluster 213 in the capacity-increased battery pack 21 may be set to have the same type as the capacity-increased battery cluster 113 in the capacity-increased battery pack 11, for example, when the capacity-increased battery cluster 113 is a lead-acid battery cluster, the capacity-increased battery cluster 213 is also a lead-acid battery cluster; when the capacity-determining cell cluster 113 is a lithium-ion cell cluster, the capacity-increasing cell cluster 213 is also a lithium-ion cell cluster.
Further, the number of the compatibilized battery clusters 213 in the compatibilized battery pack 21 is the same as the number of the fixed volume battery clusters 113 in the fixed volume battery pack 11, for example, when 20 fixed volume battery clusters 113 are included in the fixed volume battery pack 11, 20 groups of the compatibilized battery clusters 213 are also included in the compatibilized battery pack 21.
Further, the connection manner of the plurality of capacity-increased cell clusters 213 is the same as the connection manner of the plurality of capacity-fixed cell clusters 113, for example, when the plurality of capacity-fixed cell clusters 113 are connected in series to form the whole capacity-increased battery pack 11, the plurality of capacity-increased cell clusters 213 are connected in series to form the whole capacity-increased battery pack 21.
In summary, the model selection of the capacity-increased battery cluster 213 is the same as the model selection of the constant-volume battery cluster 113; the number n1 of the compatibilized battery clusters 213 and the number n2 of the constant volume battery clusters 113 satisfy n 1-n 2; the connection mode of the multiple capacity-increasing battery clusters 213 is the same as that of the multiple constant-volume battery clusters 113, the arrangement ensures that the consistency of the capacity-increasing battery pack 21 and the constant-volume battery pack 11 is good, and the management of the energy storage power station is convenient to realize.
Further, as shown in fig. 1, the capacity increasing module 20 provided by the embodiment of the present invention may further include a plurality of capacity increasing battery cluster management units 24 and capacity increasing battery pack management units 25; the capacity-increased battery cluster management units 24 are in one-to-one correspondence and are in communication connection with the capacity-increased battery clusters 213; the plurality of capacity-increased battery cluster management units 24 are all connected with the capacity-increased battery pack management unit 25 in communication.
Exemplarily, the capacity-increasing module 20 provided by the embodiment of the present invention may further include a plurality of capacity-increasing battery cluster management units 24, where the capacity-increasing battery cluster management units 24 are in one-to-one correspondence and communication connection with the capacity-increasing battery cluster 213, and are used for monitoring the operating state of the capacity-increasing battery cluster 213, such as voltage, current, state of charge and operating temperature. The multiple capacity-increasing battery cluster management units 24 are all in communication connection with the capacity-increasing battery management unit 25, and the capacity-increasing battery management unit 25 is configured to manage the operating state of the capacity-increasing battery 21 composed of the multiple capacity-increasing battery clusters 213, such as the voltage, the current, the state of charge, and the operating temperature of the entire capacity-increasing battery 21, ensure that the balance among the capacity-increasing battery clusters 213 is achieved, for example, control the balanced discharge of the multiple capacity-increasing battery clusters 213, avoid the over-discharge of the individual capacity-increasing battery clusters 213, avoid the under-discharge of the individual capacity-increasing battery clusters 213, and ensure the balanced discharge of the multiple capacity-increasing battery clusters 213 in.
Further, as shown in fig. 1, the constant volume module 10 may further include a constant volume battery cluster management unit 14 and a constant volume battery pack management unit 15; the capacity-increased battery cluster management unit 24 and the constant-volume battery cluster management unit 14 have the same working parameters; the capacity-increasing battery management unit 25 and the capacity-fixing battery management unit 15 have the same operating parameters.
Illustratively, the capacity-increased battery cluster management unit 24 and the capacity-fixed battery cluster management unit 14 have the same operating parameters and the same functions, and can achieve the same management for the battery clusters communicatively connected therewith. For example, the capacity-increasing battery cluster management unit 24 and the capacity-fixing battery cluster management unit 14 have the same operating voltage, the same operating current, the same operating temperature, etc., and the embodiment of the present invention does not limit this. The capacity-increasing battery pack management unit 25 and the constant-volume battery pack management unit 15 have the same working parameters and the same functions, and can realize the same management on the battery cluster management unit in communication connection with the capacity-increasing battery pack management unit. For example, the capacity-increasing battery management unit 25 and the constant-volume battery management unit 15 have the same operating voltage, the same operating current, the same operating temperature, etc., and the embodiment of the present invention does not limit this. Setting the capacity-increasing battery cluster management unit 24 and the constant-volume battery cluster management unit 14 to have the same working parameters; the capacity-increasing battery pack management unit 25 and the capacity-fixing battery pack management unit 15 have the same working parameters, so that the consistency of the whole energy storage power station after the capacity-increasing module 20 is additionally arranged can be ensured, and the energy storage power station can be simply and efficiently managed.
Optionally, as shown in fig. 1, the energy storage power station provided in the embodiment of the present invention may further include a battery management module 30 and an energy storage current device 40; the capacity-increasing battery pack management unit 25 and the capacity-fixing battery pack management unit 15 are in communication connection with the battery management module 30; the battery management module 30 is communicatively coupled to an energy storage current 40.
Illustratively, the battery management module 30 is in communication connection with the capacity-increasing battery management unit 25 and the capacity-fixing battery management unit 15, and the battery management module 30 is configured to manage working states of at least one capacity-increasing battery management unit 25 and the plurality of capacity-fixing battery management units 15, such as voltages, currents, states of charge, and working temperatures of the entire capacity-increasing module 20 and the entire capacity-fixing module 10, so as to ensure that the balance between the capacity-increasing module 20 and the capacity-fixing module 10 is achieved, for example, the capacity-increasing module 20 and the capacity-fixing module 10 are controlled to discharge in a balanced manner, so as to prevent the capacity-increasing module 20 from over-discharging, the capacity-fixing module 10 from under-discharging, which results in an over-loss of the capacity-increasing module, accelerate an aging speed of the capacity-increasing module 20, and.
Further, the working state of the capacity-increased battery cluster 213 is monitored by the one-to-one correspondence and communication connection between the capacity-increased battery cluster management unit 24 and the capacity-increased battery cluster 213; the capacity-increased battery pack management unit 25 is in communication connection with the capacity-increased battery cluster management units 24, manages the working state of the capacity-increased battery pack 21 composed of the capacity-increased battery clusters 213, and ensures the balance among the capacity-increased battery clusters 213; the battery management module 30 is in communication connection with the capacity-increasing battery pack management unit 25 and the constant volume battery pack management unit 15, so that balance between the capacity-increasing module 20 and the constant volume module 10 is guaranteed, tertiary management of charging and discharging in the energy storage power station is guaranteed, management efficiency of the energy storage power station is improved, and stable and safe capacity increasing of the energy storage power station is guaranteed.
Further, the embodiment of the utility model provides an energy storage power station can also include energy storage current ware 40 for at the in-process that discharges, the direct current that provides increase-volume module 20 and constant volume module 10 is the alternating current, and in the charging process, charges increase-volume module 20 and constant volume module 10 after being the direct current with the alternating current conversion that the external world provided. Optionally, the battery management module 30 is communicatively coupled to the energy storage current 40, and the battery management module 26 may be configured to manage the magnitude of the discharge current and the charge current.
Optionally, the battery management module 30 further comprises at least one compatibilization interface (not shown in the figures); the capacity-increasing battery management unit 25 is communicatively connected to the battery management module 26 via a capacity-increasing interface.
Illustratively, the battery cluster management unit 24 and the battery pack management unit 25 are both hardware components of the battery management module 26. Because the battery pack management unit 25 is newly added in the capacity increasing process of the energy storage power station, a capacity increasing battery pack communication port, namely a capacity increasing interface, needs to be reserved in the battery management module 30 at the later stage during the initial construction of the energy storage power station, so that preparation is made for realizing capacity increasing of the energy storage power station in the future.
Based on same utility model concept, the embodiment of the utility model provides a capacity increasing method in energy storage power station is still provided, and is concrete, and fig. 2 is the utility model provides a flow schematic diagram of capacity increasing method in energy storage power station, as shown in fig. 2, the utility model provides an energy storage capacity increasing method includes:
and S110, determining the capacity increase of the energy storage power station.
For example, assuming that the total capacity of the original energy storage power station is Se, the current capacity is attenuated to S, the total number of the constant volume modules before capacity increase is n, and the capacity of the battery pack module is Se, where Se is n × Se, in order to maintain the performance of the energy storage power station unchanged, the capacity increase of the energy storage power station is required to be △ S — Se in theory.
And S120, determining the number of the capacity-increased modules according to the capacity-increased capacity and the capacity of the single capacity-increased module.
Illustratively, the capacity of the capacity-increased battery pack in the capacity-increased module is the same as that of the capacity-increased battery pack in the capacity-increased module, so the number of the capacity-increased battery packs meeting the capacity-increased capacity is △ n [ (△ S)/se ] which is rounded up, and the total number of the battery packs in the energy storage power station after capacity-increased is n' ═ n + △ n.
And S130, arranging the capacity increasing modules and the capacity fixing modules in parallel according to the number of the capacity increasing modules.
Because the instability is difficult to control when the capacity increasing module is connected with the constant volume module in series, great potential safety hazard exists, and in turn, the capacity increasing module and the constant volume module are arranged in parallel in the issuing embodiment, so that the high stability and the high safety of the energy storage power station are ensured.
Further, the capacity-increasing module comprises a capacity-increasing battery pack and a capacity-increasing battery protection unit; the constant volume module comprises a constant volume battery pack and a constant volume battery pack protection unit; the rated working voltage U1 of the capacity-increasing battery protection unit and the rated working voltage U2 of the capacity-fixing battery protection unit meet the condition that U1 is equal to U2; the rated working current I1 of the capacity-increased battery protection unit meets the condition that I1 is U1/R1, and R1 is the resistance value of the capacity-increased battery pack.
For example, the rated working voltage U1 of the capacity-increasing battery pack protection unit in the rated working state and the rated working voltage U2 of the constant-volume battery pack protection unit are set to satisfy the condition that U1 is equal to U2, so that the capacity-increasing battery pack protection unit is simple to set, and the capacity-increasing battery pack protection unit and the constant-volume battery pack protection unit are only required to be set in parallel. Furthermore, the rated working current of the capacity-increasing battery pack protection unit is determined according to the maximum current which may flow in the rated working state of the capacity-increasing battery pack, that is, the rated working current of the capacity-increasing battery pack protection unit meets the condition that I1 is U1/R1, and R1 is the resistance value of the capacity-increasing battery pack, so that the capacity-increasing battery pack protection unit can protect the capacity-increasing battery pack, the situation that the capacity-increasing battery pack is overcharged and overdischarged is avoided, the working stability of the capacity-increasing battery pack is ensured, the working state of the whole energy storage power station is ensured to be stable under the situation that the capacity-increasing is realized. Specifically, when the discharge current of the compatibilized battery pack is greater than U1/R1, the protective unit of the compatibilized battery pack is disconnected, so that the over-discharge condition of the compatibilized battery pack is avoided; when the charging current of the capacity-increased battery pack is larger than U1/R1, the protection unit of the capacity-increased battery pack is disconnected, the situation that the capacity-increased battery pack is overcharged is avoided, the working stability of the capacity-increased battery pack is ensured, and the service life of the capacity-increased battery pack is prolonged.
To sum up, the embodiment of the present invention provides a capacity increasing method for an energy storage power station, wherein the number of capacity increasing modules is determined according to the capacity increasing capacity of the energy storage power station, the capacity increasing modules are further arranged in parallel with the constant volume modules, and the rated operating voltage U1 of the capacity increasing battery pack protection unit and the rated operating voltage U2 of the constant volume battery pack protection unit meet the requirement that U1 is U2; the rated working current I1 of the capacity-increasing battery pack protection unit meets the condition that I1 is U1/R1, the rated working voltage and the rated working current of the capacity-increasing battery pack protection unit are reasonably set, the safety of the energy storage power station is ensured on the premise of capacity increase of the energy storage power station, the capacity-increasing scheme is feasible, and the technical problem that the capacity increase of the energy storage power station is difficult due to improper configuration of new and old batteries in the capacity-increasing process of the energy storage power station in the prior art is solved.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, but that the features of the various embodiments of the invention may be partially or fully coupled to each other or combined and may cooperate with each other and be technically driven in various ways. Numerous obvious variations, rearrangements, combinations, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (9)
1. The energy storage power station is characterized by comprising a plurality of constant volume modules and at least one capacity increasing module, wherein the at least one capacity increasing module is connected with the constant volume modules in parallel;
the capacity-increasing module comprises a capacity-increasing battery pack and a capacity-increasing battery pack protection unit; the constant volume module comprises a constant volume battery pack and a constant volume battery pack protection unit;
the rated working voltage U1 of the capacity-increased battery pack protection unit and the rated working voltage U2 of the capacity-increased battery pack protection unit meet the condition that U1 is equal to U2;
the rated working current I1 of the protection unit of the compatibilized battery pack meets the condition that I1 is U1/R1, and R1 is the resistance value of the compatibilized battery pack.
2. The energy storage power station of claim 1 wherein the capacity-increasing battery protection units comprise capacity-increasing fuses, capacity-increasing contactors, and capacity-increasing circuit breakers;
the capacity-increased battery pack comprises a first signal terminal and a second signal terminal; the capacity-increasing breaker comprises a first control switch and a second control switch;
the first signal end is electrically connected with the first control switch sequentially through the capacity-increasing fuse and the capacity-increasing contactor;
the second signal end is electrically connected with the second control switch.
3. The energy storage power station of claim 2 wherein the fixed-volume battery pack protection unit comprises a fixed-volume fuse, a fixed-volume contactor, and a fixed-volume breaker;
the rated working voltage U11 of the capacity-increasing fuse and the rated working voltage U21 of the constant volume fuse meet the condition that U11 is equal to U21; the rated working current I11 of the capacity-increasing fuse meets the condition that I11 is U11/R1, and R1 is the resistance value of the capacity-increasing battery pack;
the rated working voltage U12 of the capacity-increasing contactor and the rated working voltage U22 of the constant-volume contactor meet the condition that U12 is equal to U22; the rated working current I12 of the capacity-increasing contactor meets the condition that I12 is U12/R1, and R1 is the resistance value of the capacity-increasing battery pack;
the rated working voltage U13 of the capacity-increasing circuit breaker and the rated working voltage U23 of the capacity-increasing circuit breaker meet the condition that U13 is equal to U23; the rated working current I13 of the capacity-increasing breaker meets the condition that I13 is U13/R1, and R1 is the resistance value of the capacity-increasing battery pack.
4. The energy storage power station of claim 2 wherein the compatiblizing module further comprises a compatiblizing cable;
the first signal end is electrically connected with the capacity-increasing fuse through the capacity-increasing cable;
the capacity-increasing fuse is electrically connected with the capacity-increasing contactor through the capacity-increasing cable;
the capacity-increasing contactor is electrically connected with the first control switch through the capacity-increasing cable;
the second signal end is electrically connected with the second control switch through the capacity-increasing cable;
the current-carrying capacity I2 of the compatibilized cable and the rated working current I1 of the compatibilized battery protection unit meet the condition that I2 is not less than I1.
5. The energy storage power station of claim 1 wherein the capacity-increasing battery pack comprises a plurality of capacity-increasing battery clusters, and the constant volume battery pack comprises a plurality of constant volume battery clusters;
the type selection of the capacity-increased battery cluster is the same as that of the constant-volume battery cluster;
the number n1 of the compatibilized battery clusters and the number n2 of the constant volume battery clusters meet the condition that n1 is n 2;
the connection mode of the capacity-increased battery clusters is the same as that of the capacity-fixed battery clusters.
6. The energy storage power station of claim 5 wherein the capacity-increasing module further comprises a plurality of capacity-increasing cell cluster management units and capacity-increasing battery pack management units;
the capacity-increased battery cluster management units correspond to the capacity-increased battery clusters one by one and are in communication connection;
and the plurality of capacity-increased battery cluster management units are in communication connection with the capacity-increased battery pack management unit.
7. The energy storage power station of claim 6 wherein the constant volume module further comprises a constant volume battery cluster management unit and a constant volume battery pack management unit;
the capacity-increased battery cluster management unit and the constant-volume battery cluster management unit have the same working parameters;
the capacity-increasing battery pack management unit and the constant-volume battery pack management unit have the same working parameters.
8. The energy storage power station of claim 6 further comprising a battery management module and an energy storage current;
the capacity-increasing battery pack management unit and the constant-volume battery pack management unit are in communication connection with the battery management module;
the battery management module is in communication connection with the energy storage current device.
9. The energy storage power station of claim 8 wherein the battery management module further comprises at least one capacity-increasing interface;
and the capacity-increasing battery pack management unit is in communication connection with the battery management module through the capacity-increasing interface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110266081A (en) * | 2019-07-12 | 2019-09-20 | 上海电力设计院有限公司 | A kind of energy-accumulating power station and its compatibilizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110266081A (en) * | 2019-07-12 | 2019-09-20 | 上海电力设计院有限公司 | A kind of energy-accumulating power station and its compatibilizing method |
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