An energy storage battery system

Abstract

The utility model discloses an energy storage battery system, energy storage battery system includes at least one battery cluster and at least one high pressure box, and one battery cluster corresponds through one high pressure box and is connected in parallel on the busbar, and each battery cluster includes charger, a plurality of battery packs and a plurality of equalization regulation loop, and charger, equalization regulation loop all are arranged in the high pressure box, and one battery pack corresponds through one equalization regulation loop and is connected in parallel to the equalization loop busbar, and charger is connected in series on the equalization loop busbar, and charger equalization power compensation for corresponding battery pack when equalization regulation loop is closed. The utility model solves the technical problem of the safety, the economy of battery system caused by the voltage imbalance between the battery pack in the battery cluster in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, and in particular to an energy storage battery system. Background Technology

[0002] Centralized electrochemical energy storage systems connect battery clusters in parallel, collect current through a combiner block in a combiner cabinet, and then connect to the grid after inverter boosting. If the cell packs within a cluster cannot be balanced, problems such as excessive voltage difference within the cluster, insufficient utilization of the cluster capacity, and reduced discharge capacity can occur, significantly impacting economic value. If the imbalance between cell packs widens, it may further increase the voltage difference between clusters, leading to excessive inter-cluster circulating current and even safety risks. To mitigate the impact of cell pack imbalance, manual external adjustment and balancing are often required, consuming significant manpower for maintenance. Utility Model Content

[0003] This utility model provides a method for equalization control of an energy storage battery system and an energy storage battery system, which solves the technical problem in the prior art where voltage imbalance between battery packs within a battery cluster affects the safety and economy of the battery system.

[0004] This utility model embodiment provides an energy storage battery system, the energy storage battery system comprising:

[0005] At least one battery cluster and at least one high-voltage box, wherein one battery cluster is connected in parallel to the busbar via one of the high-voltage boxes;

[0006] Each of the battery clusters includes a charger, multiple battery packs, and multiple equalization and adjustment circuits; the charger and the equalization and adjustment circuits are all located inside the high-voltage box;

[0007] One of the battery packs is connected in parallel to the equalization circuit bus via one of the equalization adjustment circuits; the charger is connected in series to the equalization circuit bus.

[0008] The charger provides balanced charging to the corresponding battery pack when the equalization adjustment circuit is closed.

[0009] Furthermore, the energy storage battery system also includes a main control unit;

[0010] Each of the aforementioned equalization adjustment circuits and the aforementioned charger are electrically connected to the aforementioned main control unit;

[0011] The main control unit is used to control the balancing adjustment circuit to close and to control the charger to perform equalization charging for the corresponding battery pack.

[0012] Furthermore, each of the battery clusters also includes a first circuit breaker;

[0013] The first circuit breaker is located on the equalization circuit bus and between the charger and the equalization adjustment circuit.

[0014] Furthermore, each of the battery clusters also includes multiple relays;

[0015] Multiple relays are respectively installed on each of the equalization adjustment circuits and on the main circuit of the battery cluster, and the main circuit of the battery cluster is connected in parallel with the equalization adjustment circuit.

[0016] Furthermore, each of the battery clusters also includes a Hall sensor and a shunt disposed within the high-voltage box;

[0017] The shunt is located on the negative terminal connection line of the main circuit of the battery cluster and is used to obtain the current of the corresponding battery cluster.

[0018] The Hall sensor is installed on the positive terminal connection line of the main circuit of the battery cluster and is used as a backup current detection device to obtain the current of the corresponding battery cluster.

[0019] Furthermore, each of the battery clusters also includes a main fuse disposed within the high-voltage box;

[0020] The main fuse includes a main positive fuse and a main negative fuse, which are respectively installed on the positive terminal connection line and the negative terminal connection line of the main circuit of the battery cluster.

[0021] Furthermore, each of the battery clusters also includes a main circuit switch disposed within the high-voltage box;

[0022] The main circuit switch includes a first switch and a second switch connected in series. The first switch is connected in series to the positive terminal connection line of the main circuit of the battery cluster, and the second switch is connected in series to the negative terminal connection line of the main circuit of the battery cluster.

[0023] Furthermore, each of the battery clusters also includes a battery pack contactor, a battery pack fuse, and a battery pack manual maintenance switch;

[0024] The battery pack contactor, the battery pack fuse, and the battery pack manual maintenance switch are connected in series in the main circuit of the battery pack.

[0025] Furthermore, the energy storage battery system also includes a second circuit breaker, a surge protector, and miniature circuit breakers for controlling the surge protector, the uninterruptible power supply, the charger, and the backup circuit, respectively.

[0026] The second circuit breaker, the surge protector, and each of the miniature circuit breakers are all connected in parallel on the mains connection line.

[0027] Furthermore, the energy storage battery system also includes a power interface and a power indicator light;

[0028] The power interface is used to connect to mains power;

[0029] The power indicator light is connected in parallel to the mains power connection line.

[0030] This utility model discloses an energy storage battery system, which includes at least one battery cluster and at least one high-voltage box. Each battery cluster is connected in parallel to a busbar via a corresponding high-voltage box. Each battery cluster includes a charger, multiple battery packs, and multiple equalization circuits. The charger and equalization circuits are both located within the high-voltage box. Each battery pack is connected in parallel to the equalization circuit busbar via a corresponding equalization circuit. The charger is connected in series to the equalization circuit busbar. When the equalization circuit is closed, the charger provides equalization power to the corresponding battery pack. This utility model solves the technical problem in the prior art where voltage imbalance between battery packs within a battery cluster affects the safety and economy of the battery system. It achieves automated voltage equalization adjustment between battery packs within a battery cluster, ensuring the uniformity of voltage difference within the cluster. While improving system reliability and economy and extending system lifespan, it also reduces manual maintenance costs. Attached Figure Description

[0031] Figure 1 This is an electrical connection diagram of an energy storage battery system provided in an embodiment of this utility model;

[0032] Figure 2 This is a structural block diagram of an energy storage battery system provided in an embodiment of the present invention;

[0033] Figure 3 This is an electrical connection diagram of the main circuit of the battery cluster provided in this embodiment of the utility model;

[0034] Figure 4 This is an electrical connection diagram of each equalization adjustment circuit within the battery cluster provided in this embodiment of the utility model;

[0035] Figure 5 This is a partial electrical connection diagram of the battery cluster provided in an embodiment of the present invention;

[0036] Figure 6 This is an electrical connection diagram of another energy storage battery system provided in this embodiment of the present invention. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish different objects, not to limit a specific order. The following embodiments of this utility model can be performed individually or in combination with each other; this utility model does not impose specific limitations in this regard.

[0039] Figure 1 This is an electrical connection diagram of an energy storage battery system provided in an embodiment of this utility model. Figure 2 This is a structural block diagram of an energy storage battery system provided in an embodiment of this utility model.

[0040] like Figure 1 and Figure 2 As shown, the energy storage battery system includes at least one battery cluster 20 and at least one high-voltage box 30. Each battery cluster 20 is connected in parallel to a busbar (including a positive busbar P+ and a negative busbar P-) via a corresponding high-voltage box 30. Each battery cluster 20 includes a charger 21, multiple battery packs 22, and multiple equalization circuits 23. The charger 21 and equalization circuits 23 are both housed within the high-voltage box 30. Each battery pack 22 is connected in parallel to an equalization circuit busbar (including a positive equalization connection line HV+ and a negative equalization connection line HV-) via a corresponding equalization circuit 23. The charger 21 is connected in series to the equalization circuit busbar. When the equalization circuit 23 is closed, the charger 21 provides equalization power to the corresponding battery pack 22.

[0041] Specifically, the charger 21 has the function of converting AC auxiliary power of 220V or 380V into DC power of 100V to 400V, and also has the function of adjusting the voltage of the charging terminal of the adapted battery. The AC side and DC side of the charger 21 are isolated power supplies, which does not affect the insulation detection function of the DC system. When a voltage imbalance is detected between a certain battery pack 22 and other battery packs 22, the corresponding equalization adjustment circuit 23 of the battery pack 22 is closed, and the charger 21 is connected to the battery pack 22 to provide equalization power to the corresponding battery pack 22, so as to ensure the voltage balance between the packs in the battery cluster 20 of the energy storage battery system.

[0042] By placing the charger 21 and the equalization circuit 23 within the high-voltage box 30 corresponding to each battery cluster 20, space can be saved, eliminating the need to reserve additional space for the charger 21 and the equalization circuit 23. Each battery cluster 20 includes multiple battery packs 22 connected in series; each battery pack 22 includes multiple battery cells connected in series and / or in parallel.

[0043] like Figure 1 As shown, the individual battery cells within the battery pack 22 can be connected in series and then encapsulated within the battery pack 22. Alternatively, several battery cells can be connected in parallel as needed, and then multiple sets of parallel battery cells can be connected in series. No specific limitations are imposed here. In this embodiment of the invention, the battery pack 22 can be a 1P52S battery module.

[0044] This invention solves the technical problem in the prior art where voltage imbalance between battery packs within a battery cluster affects the safety and economy of the battery system. It achieves the technical effect of automatically adjusting the voltage balance between battery packs within a battery cluster, ensuring the uniformity of the voltage difference within the cluster. While improving system reliability and economy and extending system life, it also reduces human maintenance costs.

[0045] Optionally, such as Figure 2 As shown, the energy storage battery system also includes a main control unit 10; each equalization adjustment circuit 23 and charger 21 are electrically connected to the main control unit 10. The main control unit 10 is used to control the closure of the equalization adjustment circuit 23 and control the charger 21 to perform equalization charging for the corresponding battery pack 22.

[0046] Specifically, the main control unit 10 can be a BMS (Battery Management System). The main control unit 10 can detect the voltage of each battery pack 22 at preset intervals, and based on the detection results, use the charger 21 and the equalization adjustment circuit 23 to adjust the power supply of the corresponding battery pack 22 to ensure the balance between the battery packs 20 in the energy storage battery system.

[0047] Specifically, the main control unit 10 uses the following method for balancing the energy storage battery system:

[0048] S11, detect whether there is a first target battery pack, wherein the first target battery pack is a battery pack in the battery cluster whose voltage difference with other battery packs is greater than a first set threshold.

[0049] Specifically, the main control unit 10 detects the voltage of each battery pack 22 in the battery cluster 20 at preset intervals. The first set threshold can be set to 5% as needed. When the voltage of a certain battery pack 22 is low and the voltage difference between it and other battery packs is greater than 5%, it is determined that there is a first target battery pack with unbalanced voltage, and it is necessary to perform power replenishment and balancing between the packs in the cluster.

[0050] S12, if present, control the equalization adjustment circuit corresponding to the first target battery pack to close, and use the charger to perform equalization charging for the first target battery pack until the voltage difference between the first target battery pack and other battery packs is less than or equal to the second set threshold.

[0051] Specifically, when it is determined that inter-packet power replenishment and equalization needs to be performed, the contactor on the equalization adjustment circuit 23 corresponding to the first target battery pack is closed, so that the equalization adjustment circuit 23 is connected to the charger 21, and the charger 21 performs power replenishment and charging for the first target battery pack under the control of the main control unit 10.

[0052] During the charging process of the first target battery pack, the voltage difference between the first target battery pack and other battery packs is detected in real time. The second set threshold can be set to 1% as needed. When the voltage difference between the first target battery pack and the gas battery pack is detected to be less than or equal to 1%, the charger 21 is controlled to stop charging, the contactor on the corresponding equalization adjustment circuit 23 is disconnected, and the charging equalization ends.

[0053] Based on the above technical solutions, after the battery cluster has completed charging, the main control unit 10 further includes the following method for balancing the energy storage battery system:

[0054] S21, determine the second target battery pack within the battery cluster, wherein the second target battery pack is the battery pack that first reaches the charging cutoff voltage among all battery packs in the battery cluster.

[0055] Specifically, assuming the charging cutoff voltage of the battery pack is 3.65V, when charging the energy storage battery system, if any one battery pack in the cluster charges to 3.65V, the entire cluster will stop charging. At this point, the other battery packs have not yet charged to 3.65V, causing voltage imbalance between the packs within the cluster. Therefore, it is necessary to determine the second target battery pack that will charge to 3.65V first.

[0056] S22, control the equalization adjustment circuits corresponding to other battery packs except the second target battery pack to close sequentially, and use the charger to sequentially equalize and charge each battery pack except the second target battery pack until each battery pack reaches the charging cutoff voltage.

[0057] Specifically, after identifying the second target battery pack that is charged to 3.65V first, the corresponding equalization adjustment circuits 23 of the other battery packs besides the second target battery pack are closed in sequence to provide additional power to the other battery packs 22 that are not fully charged to 3.65V, until all battery packs 22 are charged to 3.65V, thus completing the charging equalization of the battery cluster 20.

[0058] Based on the above technical solutions, the main control unit 10 also includes the following method for balancing the energy storage battery system:

[0059] S31, determine whether there is a third target battery pack in the battery cluster, wherein the third target battery pack is the battery pack in the battery cluster that has been replaced with a new battery pack.

[0060] Specifically, when there is a battery pack 22 in the battery cluster 20 that needs to be replaced, after replacing the new battery pack 22, the main control unit 10 will identify the third target battery pack that has been replaced.

[0061] S32, use the charger to perform a total voltage test on the third target battery pack to determine the relationship between the total voltage of the third target battery pack and the total voltage of other battery packs in the battery cluster.

[0062] Specifically, when there is a replaced third target battery pack in the battery cluster 20, there is a voltage difference between the replaced new battery pack and the other unreplaced battery packs 22. In order to maintain the voltage balance between the packs in the cluster, it is also necessary to detect the voltage of the replaced third target battery pack to determine whether there is an imbalance between the voltage of the third target battery pack and the other battery packs 22 in the battery cluster 20.

[0063] S33 controls the closure of the corresponding equalization adjustment circuit of the battery pack based on the determined total voltage relationship to achieve equalization power replenishment adjustment.

[0064] Specifically, if it is determined that there is a voltage imbalance between the third target battery pack and other battery packs 22, the equalization adjustment circuit 23 corresponding to the third target battery pack is closed according to the magnitude of the voltage difference to perform power equalization on the third target battery pack, or the equalization adjustment circuit 23 corresponding to other battery packs 22 is closed to perform power equalization on other battery packs 22, so as to achieve voltage equalization between packs within the cluster.

[0065] Optionally, S33 specifically includes:

[0066] S331, if the total voltage of the third target battery pack is greater than the first percentage of the total voltage of the other battery packs, then control the equalization adjustment circuits of the other battery packs (excluding the third target battery pack) to close sequentially, and use the charger to provide equalization charging to each battery pack (excluding the third target battery pack) in sequence until each battery pack reaches the total voltage of the third target battery pack.

[0067] Specifically, the first percentage can be set to 105% as needed. When the total voltage of the third target battery pack is greater than 105% of the total voltage of the other battery packs 22, it indicates that the voltage of the other battery packs 22 is lower than that of the third target battery pack. At this time, it is necessary to sequentially close the equalization adjustment circuit 23 corresponding to the other battery packs 22 and control the charger 21 to replenish the other battery packs 22 in turn to achieve voltage balance between the packs in the cluster.

[0068] S332, if the total voltage of the third target battery pack is less than the second percentage of the total voltage of the other battery packs, then control the equalization adjustment circuit corresponding to the third target battery pack to close, and use the charger to perform equalization charging for the third target battery pack until the total voltage of the third target battery pack reaches the average voltage of the other battery packs, wherein the value of the second percentage is less than the value of the first percentage.

[0069] Specifically, the second percentage can be set to 95% as needed. When the total voltage of the third target battery pack is less than 95% of the total voltage of the other battery packs 22, it indicates that the voltage of the third target battery pack is lower than that of the other battery packs 22. At this time, it is necessary to close the equalization adjustment circuit 23 corresponding to the third target battery pack and control the charger 21 to replenish the third target battery pack, so as to achieve voltage balance between the packs in the cluster.

[0070] Figure 3 This is an electrical connection diagram of the main circuit of the battery pack provided in this embodiment of the utility model. Figure 4 This is an electrical connection diagram of each equalization adjustment circuit within the battery cluster provided in this embodiment of the utility model. Figure 5 This is a partial electrical connection diagram of the battery cluster provided in an embodiment of the present invention.

[0071] Optionally, such as Figure 4 As shown, each battery cluster 20 also includes a first circuit breaker MCCB1, which is located on the equalization circuit bus and between the charger 21 and the equalization adjustment circuit 23.

[0072] Optionally, such as Figures 3-5 As shown, each battery cluster 20 also includes multiple relays KM. In this embodiment of the invention, Figures 3-5 Each relay is distinguished by the designation KM0, KM1, KM2, KM3... Multiple relays KM are respectively installed on each equalization adjustment circuit 23 and on the main circuit of the battery cluster 20 (including the positive connection line B+ and the negative connection line B-), such as... Figure 5 As shown, the main circuit of the battery cluster 20 is connected in parallel with the equalization adjustment circuit 23.

[0073] Specifically, such as Figure 3As shown, the main positive relay KM1 and the main negative relay KM2 are used to switch the main circuit on and off by opening and closing. The high-voltage box 30 also includes a circulating current relay KM3 and a pre-charge resistor R1. The circulating current relay KM3 and the pre-charge resistor R1 are connected in series and then connected in parallel to the two ends of the main positive terminal electrical appliance KM1.

[0074] See Figure 4 , Figure 4 An exemplary schematic diagram is provided, showing four equalization adjustment loops 23, each of which is equipped with an equalization relay. Figure 4 (Distinguished by KM4, KM6, KM8, and KM10 respectively) and a balancing relay negative ( Figure 4 (These are distinguished as KM5, KM6, KM9, and KM11 respectively). Each equalization adjustment circuit 23 also has a fuse FU connected in series next to its equalization relay. Figure 4 The numbers are labeled FU3, FU4, FU5, and FU6 respectively.

[0075] In addition to the above technical solutions, the main control unit 10's method for balancing the energy storage battery system further includes: before controlling the corresponding balancing adjustment circuit, detecting whether each relay KM is not stuck; if it is, continuing to execute the action of controlling the corresponding balancing adjustment circuit 23 to close; if it is not, controlling the first circuit breaker MCCB1 to open, and the balancing power replenishment adjustment ends.

[0076] Specifically, such as Figure 4 As shown, the positive balancing connection line HV+ and the negative balancing connection line HV- in the balancing adjustment circuit are equipped with a first circuit breaker MCCB1, which has interlocking switches 1-2 and 3-4, to control the on / off state of the balancing adjustment circuit. Each relay KM has an auxiliary contact function for detecting relay KM sticking. If sticking is present, it indicates a relay KM closing fault, and the first circuit breaker MCCB1 is opened, the balancing adjustment circuit is disconnected, and balancing power replenishment adjustment is received; if there is no sticking, it indicates that the relay KM is in normal condition, and subsequent balancing power replenishment operations continue.

[0077] Optionally, such as Figure 3 As shown, each battery cluster 20 also includes a Hall sensor SH1 and a shunt SH2 disposed in the high-voltage box 30; the shunt SH2 is disposed on the negative terminal connection line B- of the main circuit of the battery cluster 20 and is used to obtain the current of the corresponding battery cluster 20; the Hall sensor SH1 is disposed on the positive terminal connection line B+ of the main circuit of the battery cluster 20 and is used as a backup current detection device to obtain the current of the corresponding battery cluster 20.

[0078] Specifically, the shunt SH2 transmits a large amount of data, has a high acquisition frequency, and high detection accuracy, and is used to obtain the current of battery cluster 20. The Hall sensor SH1 serves as a backup detection device, with a lower acquisition frequency than the shunt SH2. The current acquired by the Hall sensor SH1 can be used as a control group or reference value to test the accuracy of the current acquired by the shunt SH2.

[0079] Optionally, such as Figure 3 As shown, each battery cluster 20 also includes a main fuse FU disposed in the high-voltage box 30; the main fuse includes a main positive fuse FU1 and a main negative fuse FU2, which are respectively disposed on the positive terminal connection line B+ and the negative terminal connection line B-.

[0080] Specifically, the main positive fuse FU1 and the main negative fuse FU2 are used to provide overcurrent protection for the devices on the positive connection line B+ and the negative connection line B-.

[0081] Optionally, such as Figure 3 As shown, each battery cluster 20 also includes a main circuit switch QS1 disposed in the high voltage box 30; the main circuit switch QS1 includes a first switch QS1-1 and a second switch QS1-2 connected in series, the first switch QS1-1 is connected in series on the positive terminal connection line B+, and the second switch QS1-2 is connected in series on the negative terminal connection line B-.

[0082] Specifically, the first switch QS1-1 includes a moving contact 1 and a stationary contact 2, and the second switch QS1-2 includes a moving contact 3 and a stationary contact 4. The main circuit switch QS1 is a normally closed switch, and its function is to isolate and protect. When it is necessary to inspect or maintain the energy storage battery system, the control will open the main circuit switch QS1.

[0083] Optionally, such as Figure 5 As shown, each battery cluster 20 also includes a battery pack contactor KM0, a battery pack fuse FU0, and a battery pack manual maintenance switch MSD; the battery pack contactor KM0, the battery pack fuse FU0, and the battery pack manual maintenance switch MSD are connected in series in the main circuit of the battery cluster 20.

[0084] Specifically, the battery pack contactor KM0 controls the opening and closing of the positive terminal connection B+ and the negative terminal connection B- in the main circuit, such as... Figure 5 The equalization circuit bus (including the positive equalization connection line HV+ and the negative equalization connection line HV-) is connected in parallel with the main circuit (including the positive connection line B+ and the negative connection line B-). The battery pack fuse FU0 is used for short-circuit protection of the main circuit and the equalization circuit bus. The battery pack manual maintenance switch MSD is used to manually disconnect the power to the battery cluster when the energy storage battery system needs to be manually maintained by the staff.

[0085] Figure 6This is an electrical connection diagram of another energy storage battery system provided in this embodiment of the present invention.

[0086] Optionally, such as Figure 6 As shown, the energy storage battery system also includes a second circuit breaker MCCB2, a surge protector SPD1, and miniature circuit breakers MCB1, MCB2, MCB3, and MCB4 for controlling the surge protector SPD1, the uninterruptible power supply UPS, the charger 21, and the backup circuit 40, respectively; the second circuit breaker MCCB2, the surge protector SPD1, and each miniature circuit breaker MCB are all connected in parallel on the mains connection line.

[0087] Optionally, such as Figure 6 As shown, the energy storage battery system also includes a power interface C1 and power indicator lights X (including X1, X2, and X3 indicating the on / off state of the three-phase power supply); the power interface C1 is used to connect to the mains power, wherein the power interface C1 can connect the three-phase live wires L1, L2, and L3, the neutral wire N, and the ground wire PE of the mains power; the power indicator lights X are connected in parallel on the mains connection line.

[0088] Specifically, the auxiliary power is drawn from the combiner cabinet distribution box, and the miniature circuit breaker MCB4 has a shunt trip function for emergency shutdown in case of critical faults.

[0089] In this embodiment of the invention, by setting a balancing adjustment circuit for each battery pack and using a charger to replenish power through the balancing adjustment circuit, the problem of voltage difference between packs within the battery cluster is solved, the problem of voltage imbalance between packs after charging in centralized energy storage battery systems is solved, and the problem of needing on-site manual voltage balancing after replacing old and new battery packs is solved. This increases the capacity of the battery cluster, realizes balanced management at the battery pack level, and improves the electrical safety of the energy storage battery system.

[0090] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0091] Finally, it should be noted that the above are merely preferred embodiments and the technical principles applied in this utility model. Those skilled in the art will understand that this utility model is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this utility model. Therefore, although the utility model has been described in detail through the above embodiments, this utility model is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this utility model, and the scope of this utility model is determined by the scope of the appended claims.

Claims

1. An energy storage battery system, characterized in that, The energy storage battery system includes: At least one battery cluster and at least one high-voltage box, wherein one battery cluster is connected in parallel to the busbar via one of the high-voltage boxes; Each of the battery clusters includes a charger, multiple battery packs, and multiple equalization and adjustment circuits; the charger and the equalization and adjustment circuits are all located inside the high-voltage box; One of the battery packs is connected in parallel to the equalization circuit bus via one of the equalization adjustment circuits; the charger is connected in series to the equalization circuit bus. The charger provides balanced charging to the corresponding battery pack when the equalization adjustment circuit is closed.

2. The energy storage battery system according to claim 1, characterized in that, The energy storage battery system also includes a main control unit; Each of the aforementioned equalization adjustment circuits and the aforementioned charger are electrically connected to the aforementioned main control unit; The main control unit is used to control the balancing adjustment circuit to close and to control the charger to perform equalization charging for the corresponding battery pack.

3. The energy storage battery system according to claim 1, characterized in that, Each of the battery clusters also includes a first circuit breaker; The first circuit breaker is installed on the equalization circuit bus and between the charger and the equalization adjustment circuit.

4. The energy storage battery system according to claim 1, characterized in that, Each of the battery clusters also includes multiple relays; Multiple relays are respectively installed on each of the equalization adjustment circuits and on the main circuit of the battery cluster, and the main circuit of the battery cluster is connected in parallel with the equalization adjustment circuit.

5. The energy storage battery system according to any one of claims 1-4, characterized in that, Each of the battery clusters also includes a Hall sensor and a shunt disposed within the high-voltage box; The shunt is located on the negative terminal connection line of the main circuit of the battery cluster and is used to obtain the current of the corresponding battery cluster. The Hall sensor is installed on the positive terminal connection line of the main circuit of the battery cluster and is used as a backup current detection device to obtain the current of the corresponding battery cluster.

6. The energy storage battery system according to any one of claims 1-4, characterized in that, Each of the battery clusters also includes a main fuse disposed within the high-voltage box; The main fuse includes a main positive fuse and a main negative fuse, which are respectively installed on the positive terminal connection line and the negative terminal connection line of the main circuit of the battery cluster.

7. The energy storage battery system according to any one of claims 1-4, characterized in that, Each of the battery clusters also includes a main circuit switch disposed within the high-voltage box; The main circuit switch includes a first switch and a second switch connected in series. The first switch is connected in series on the positive terminal connection line of the main circuit of the battery cluster, and the second switch is connected in series on the negative terminal connection line of the main circuit of the battery cluster.

8. The energy storage battery system according to any one of claims 1-4, characterized in that, Each of the battery clusters also includes a battery pack contactor, a battery pack fuse, and a battery pack manual maintenance switch; The battery pack contactor, the battery pack fuse, and the battery pack manual maintenance switch are connected in series in the main circuit of the battery cluster.

9. The energy storage battery system according to claim 8, characterized in that, The energy storage battery system also includes a second circuit breaker, a surge protector, and miniature circuit breakers for controlling the surge protector, the uninterruptible power supply, the charger, and the backup circuit, respectively. The second circuit breaker, the surge protector, and each of the miniature circuit breakers are all connected in parallel on the mains connection line.

10. The energy storage battery system according to claim 8, characterized in that, The energy storage battery system also includes a power interface and a power indicator light; The power interface is used to connect to mains power; The power indicator light is connected in parallel to the mains power connection line.

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