Stacked energy storage system

Abstract

The utility model provides a stacked energy storage system which comprises a plurality of energy storage battery packs which are sequentially stacked; the connector is arranged between the adjacent energy storage battery packs and comprises a plurality of groups of connecting pins for connecting the adjacent energy storage battery packs; the detection assembly is arranged at the connector and used for collecting detection signals in the charging and discharging process of the stacked energy storage system so as to determine whether arc discharge occurs at the connecting contact pin or not according to the detection signals; and the circuit changing switch is connected with the plurality of groups of connecting pins respectively and is used for disconnecting the connecting state of the connecting pins under the condition that arc discharge occurs. According to the scheme of the utility model, the connection state of the connection pin can be disconnected under the condition of arc discharge, arc discharge fault processing can be carried out in the energy storage battery pack, the possibility of serious faults caused by arc discharge is avoided, and the safety of the stacked energy storage system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of energy storage, in particular to a stacked energy storage system. BACKGROUND

[0002] Energy storage system (ESS for short) is a system for storing and supplying electric energy, which has functions such as smooth transition, peak load shifting, frequency and voltage regulation, and can effectively improve the stability of power system operation, eliminate day-night peak valley difference, smooth load, and reduce the impact on the power grid and users caused by the randomness, intermittency and volatility of solar and wind power generation.

[0003] Battery energy storage system (BESS for short) is the most widely used type of energy storage system, which uses lithium battery / lead battery as an energy storage carrier. The safety of the battery energy storage system is an extremely important factor for its application.

[0004] Stacked energy storage battery is a common form of energy storage battery, which stacks multiple battery packs together to form a larger battery cluster. The battery packs are connected in series, thereby significantly improving the energy density and power output of the system, and are suitable for application scenarios that require high capacity and high power. During long-term operation, due to insulation aging, structural shaking, etc., the connection between the battery packs may not be tight. When charging and discharging, the stacked energy storage battery may have serious accidents such as arc, and the arc generated by the arc is extremely easy to cause fire disasters.

[0005] There is still a lack of processing means for processing the arc inside the stacked energy storage battery in the prior art. UTILITY MODEL CONTENTS

[0006] An object of the utility model is to provide a more secure stacked energy storage system.

[0007] A further object of the utility model is to reduce the adverse effects of arc on the stacked energy storage system.

[0008] In particular, the utility model provides a stacked energy storage system, which comprises:

[0009] A plurality of energy storage battery packs are sequentially stacked;

[0010] A connector is arranged between adjacent energy storage battery packs and comprises a plurality of connection pins for connecting adjacent energy storage battery packs.

[0011] A detection assembly is arranged at the connector and is used to collect detection signals during the charging and discharging process of the stacked energy storage system to determine whether the connection pins are arcing using the detection signals.

[0012] The change-over switch is connected with the multiple groups of connecting pins respectively, and is used for disconnecting the connection state of the connecting pins in the case of arc draw.

[0013] Optionally, the connector comprises:

[0014] The connecting seat is connected with the electrode interface of one of the adjacent energy storage battery packs, and comprises multiple connecting sockets corresponding to the multiple groups of connecting pins;

[0015] The connecting head is connected with the electrode interface of another of the adjacent energy storage battery packs, and is pluggably connected with the connecting seat, and

[0016] The multiple groups of connecting pins are arranged on the connecting head and are connected to the multiple connecting sockets with the plugging of the connecting head and the connecting seat.

[0017] Optionally, the change-over switch comprises multiple switch nodes, and each switch node is connected in series between a group of connecting pins and a corresponding electrode interface.

[0018] Optionally, each energy storage battery pack further comprises:

[0019] The battery manager is connected with the control end of the change-over switch connected with the energy storage battery pack, and is used for sending a disconnecting signal to the control end in the case of arc draw, so as to disconnect the corresponding switch node.

[0020] Optionally, the detection assembly comprises:

[0021] The current detector is connected between the connecting socket and the corresponding electrode interface, and is used for detecting the current of the loop to obtain a current detection signal;

[0022] The voltage detector is connected with the connecting socket and the connecting pin respectively, and is used for detecting the voltage at the connection between the connecting socket and the connecting pin to obtain a voltage detection signal.

[0023] Optionally, the detection assembly further comprises:

[0024] The noise detector is arranged at the connecting seat, and is used for detecting the sound signal at the connection between the connecting socket and the connecting pin to obtain a sound detection signal.

[0025] Optionally, the stacked energy storage system further comprises:

[0026] The inverter is connected with the energy storage battery pack, and is used for converting the electric energy of the energy storage battery pack;

[0027] The control box is connected between the inverter and the energy storage battery pack, and is used for controlling the connection between the energy storage battery pack and the inverter.

[0028] Optionally, the control box comprises:

[0029] A loop switch is configured to control the on-off of the loop between the inverter and the energy storage battery pack.

[0030] A loop signal acquisition circuit is configured to acquire the loop electrical signal between the inverter and the energy storage battery pack.

[0031] Optionally, the stacked energy storage system further comprises a battery shell, and

[0032] The plurality of energy storage battery packs are sequentially stacked inside the battery shell to form a battery cluster.

[0033] Optionally, each connector comprises three groups of connecting pins connected in parallel with each other, and the loop switch is connected with the three groups of connecting pins respectively.

[0034] The stacked energy storage system of the utility model, a plurality of energy storage battery packs are sequentially stacked, the battery packs are connected by connectors, detection components are arranged at the connectors, and detection signals in the charging and discharging process of the energy storage system are adopted. The detection signals are used as the basis for judging the arc when the connecting pins of the connector appear arc. The loop switch is connected with the multiple groups of connecting pins respectively, and is used for disconnecting the connection state of the connecting pins in the case of arc, so that arc fault processing can be performed in the energy storage battery pack. The possibility of serious failure caused by arc is avoided, and the safety of the stacked energy storage system is improved. The loop switch shields the unreliable connecting pins, reduces the influence range of arc fault processing, and improves the economy of the stacked energy storage system.

[0035] Further, the stacked energy storage system of the utility model, the loop switch comprises a plurality of switch nodes, and each group of connecting pins is controlled to be opened and closed. When a group of connecting pins has a problem, other connecting pins are used for replacement, automatic processing and recovery of arc fault are realized, and the operation stability of the stacked energy storage system is improved.

[0036] Further, the stacked energy storage system of the utility model, the detection components comprise a current detector, a voltage detector and a noise detector. Current detection signals, voltage detection signals and noise detection signals are obtained respectively, and detection signals of multiple data dimensions are acquired, so that the signal requirement of improving arc detection is met.

[0037] Further, the stacked energy storage system of the utility model, the plurality of energy storage battery packs are sequentially stacked inside the battery shell to form a battery cluster. The control box and the inverter are arranged outside the battery cluster, and the structure is more flexible and convenient to adjust according to the use condition.

[0038] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0039] Some embodiments of the present application will now be described in detail with reference to the drawings, which are provided by way of illustration only and therefore are not intended to limit the present application. Like reference numerals refer to like elements throughout the drawings. It should be noted that the drawings are not necessarily to scale, and that the exaggerated dimensions are used for purposes of visualizing certain aspects of the present application.

[0040] Figure 1 is a schematic block diagram of a stacked energy storage system according to an embodiment of the present application;

[0041] Figure 2 is an exploded view of components of a battery cluster in a stacked energy storage system according to an embodiment of the present application;

[0042] Figure 3 is a connection diagram of an energy storage battery pack in a stacked energy storage system according to an embodiment of the present application;

[0043] Figure 4 is a schematic diagram of a detection assembly and control components in a stacked energy storage system according to an embodiment of the present application; and

[0044] Figure 5 is a schematic block diagram of a control box in a stacked energy storage system according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present application, not all embodiments of the present application, and are intended to explain the technical principles of the present application, not to limit the protection scope of the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those skilled in the art without creative labor should still fall within the protection scope of the present application.

[0046] The product classification of the stacked energy storage system can include: single-phase, three-phase, split-phase, etc. types according to the AC side form; can be divided into low voltage (less than 60V), high voltage (60-1000V) according to the DC side form; can be divided into separate machines, stacked integrated machines, plug-in box integrated machines, etc. according to the product structure design; and can be divided into battery parallel connection, battery series connection, etc. according to the connection mode of the battery. The present embodiment takes the stacked energy storage system with high voltage battery series connection as an example for introduction, and those skilled in the art can apply the scheme of the present application to other types of stacked energy storage systems according to the relevant description.

[0047] Figure 1 is a schematic block diagram of a stacked energy storage system according to an embodiment of the present application. The stacked energy storage system comprises: a battery cluster 10, a control box 20, an inverter 30, wherein the battery cluster 10 is formed by a plurality of energy storage battery packs 110 in series. According to a conventional application scenario, the plurality of energy storage battery packs 110 are connected in series to form a high-voltage battery cluster, and the voltage of the high-voltage battery cluster 10 reaches hundreds of volts or even higher. For example, in a home storage scenario, 15 or 16 energy storage battery packs can be connected in series to form a battery cluster. For a lithium iron phosphate battery cell, the voltage of a single energy storage battery pack can be 51.2V, and the voltage of the formed battery cluster can reach about 800V. That is, the energy storage battery packs 110 are connected in series in the battery loop, and the plurality of energy storage battery packs 110 (typical battery pack voltage 51.2V) are boosted to high voltage (in the case of 16 series, the voltage can reach 820V) through series voltage boosting.

[0048] The power input and output interface of the battery cluster 10 is connected to the control box 20, and the control box 20 comprises a loop switch and a loop signal acquisition circuit, which is used to control the opening and closing of the battery cluster 10 and the acquisition of voltage, current and other signals, and realizes circuit switch control and signal acquisition.

[0049] The energy storage inverter 30 (Energy Storage Inverter, abbreviated as ESI) is used to convert the power of the battery cluster 10 into alternating current, so as to directly supply power to the power load or transmit to the power grid. The inverter 30 has a direct current end and an alternating current end, wherein the direct current end is connected to the battery cluster 10 through the control box 20, and the alternating current end is connected to the power load or the alternating current grid. In some schemes, the direct current end of the inverter 30 can be configured with a fault detection function and a signal acquisition function.

[0050] The stacked energy storage system of the embodiment can further detect, judge faults and make corresponding adjustments inside the battery cluster 10 on the basis of fault detection and signal acquisition of the energy storage inverter 30 and the control box 20. In this way, if the stacked energy storage system is determined to have a fault, it is not necessary to use the control box 20 to cut off the connection between the battery cluster 10 and the inverter 30, nor is it necessary to control and adjust the inverter 30, thereby reducing the scope of the fault influence.

[0051] Figure 2 is a component exploded view of the battery cluster 10 in the stacked energy storage system according to an embodiment of the present application. Figure 3 is a connection schematic diagram of the energy storage battery pack 110 in the stacked energy storage system according to an embodiment of the present application. The battery cluster 10 is internally provided with a plurality of energy storage battery packs 110, at least one set of connectors 120, at least one set of detection components 130, and loop switches S1, S2 and S3.

[0052] A plurality of energy storage battery packs 110 are arranged in series, and the battery packs 110 are connected in series. That is, the anode of one battery pack 110 is connected to the cathode of the adjacent battery pack 110. The adjacent energy storage battery packs 110 are connected by the connector 120.

[0053] In this embodiment, the connector 120 is arranged between the adjacent energy storage battery packs 110 and is connected in a pluggable manner, thereby facilitating assembly. Each connector 120 includes a plurality of groups of connection pins 122 for connecting the adjacent energy storage battery packs 110. The connector 120 can include a connection seat 123 and a connection head 121. The connection seat 123 and the connection head 121 of the connector 120 are arranged in cooperation with each other.

[0054] The connection seat 123 is connected to the electrode interface (which can be located at the end in the stacking direction) of one of the adjacent energy storage battery packs 110 and includes a plurality of connection holes 124 corresponding to the plurality of groups of connection pins 122.

[0055] The connection head 121 is connected to the electrode interface (which can be located at the end in the stacking direction) of the other of the adjacent energy storage battery packs 110 and is pluggable with the connection seat 123. The plurality of groups of connection pins 122 are arranged on the connection head 121 and are connected to the plurality of connection holes 124 by plugging the connection head 121 with the connection seat 123.

[0056] The changeover switch S1, S2, S3 can include a plurality of switch nodes, and each switch node is connected in series between a group of connection pins 122 and a corresponding electrode interface.

[0057] In some embodiments, each connector 120 can include three groups of connection pins 122 connected in parallel with each other, and the changeover switch S1, S2, S3 is connected to the three groups of connection pins 122, respectively. In normal connection, any one of the connection pins 122 is connected to realize power transmission. If it is determined by the detection signal of the detection assembly 130 that the connection pin 122 is in an arc situation, the connection between the connection pin 122 and the corresponding connection hole 124 can be disconnected, and another connection pin 122 connected in parallel is switched to connect, thereby solving the arc problem by switching the connection pin 122.

[0058] In other embodiments, in order to make the structure of the connector 120 more compact, the three groups of connection pins 122 connected in parallel with each other can include one main connection pin and two standby connection pins. The power transmission capacity of the main connection pin is greater than that of the two standby connection pins. In the normal use process, the main connection pin is connected by default, and the standby connection pin is connected only when the main connection pin connection is unreliable and an arc occurs. This connection method can facilitate quick switching, the action is more timely, and the connector 120 is more compact.

[0059] The connector 120 has more or less tolerance in the manufacturing process, which can cause the connection to be loose and other conditions, and in the long-term operation process, the connection reliability is reduced, and the arc is easily caused. When the series arc appears between the energy storage battery packs 110, the current loop is still in the connection state, and the effective value of the loop current is still close to the normal operation current, and the current fault characteristics are not obvious. However, the energy of the series arc is large, and the distance from the battery pack 110 position is close, and the arc burning is easy to cause serious failure.

[0060] The detection assembly 130 is arranged at the connector 120, and is used for collecting a detection signal in the charging and discharging process of the stacked energy storage system, so as to determine whether the arc appears at the connection pin by using the detection signal. The switches S1, S2 and S3 are connected with the plurality of connection pins 122 respectively, and are used for disconnecting the connection state of the connection pins 122 when the arc appears.

[0061] The battery cluster 10 can also include a battery housing 140. A plurality of energy storage battery packs 110 are sequentially stacked in the battery housing 140, thereby forming a battery cluster. The end cover 141 of the housing has an electrical energy input and output interface 142, and the control box 20 is connected with the electrical energy input and output interface 142. That is, the electrical energy input and output interface 142 serves as an interface for connecting the battery cluster 10 with external devices.

[0062] Figure 4 It is a schematic view of the detection assembly 130 and the control component in the stacked energy storage system according to an embodiment of the utility model.

[0063] The detection assembly 130 can include: a current detector 131, a voltage detector 132, and a noise detector 133. Each energy storage battery pack 110 also includes a battery manager 111.

[0064] The battery manager 111 is connected with the control end of the switch S1, S2 and S3 connected with the energy storage battery pack 110, and is used for sending a disconnecting signal to the control end when the arc appears, so as to disconnect the corresponding switch node. In some embodiments, the battery manager 111 can output a switching signal when it is determined that the arc appears. The switch S1, S2 and S3 quickly complete the connection switching action between the connection pins 122 when receiving the switching signal.

[0065] The current detector 131 is connected between the connection hole 124 and the corresponding electrode interface, and is used for detecting the current size of the loop to obtain a current detection signal. The current detection signal reflects the size of the current transmitted between the battery pack 110 loops.

[0066] The voltage detector 132 is connected with the connecting socket 124 and the connecting pin 122 respectively, and is used for detecting the voltage at the connection between the connecting socket 124 and the connecting pin 122 to obtain a voltage detection signal. The voltage detection signal reflects the voltage between the connectors of the battery cluster 10.

[0067] The noise detector 133 is arranged at the connecting seat 123, and is used for detecting the sound signal at the connection between the connecting socket 124 and the connecting pin 122 to obtain a sound detection signal. The sound detection signal reflects the sound in the battery cluster 10.

[0068] Figure 5 Fig. 2 is a schematic block diagram of the control box 20 in the stacked energy storage system according to an embodiment of the present application. The control box 20 can include: a loop switch 210, and a loop signal acquisition circuit 220.

[0069] The loop switch 210 is used for controlling the on-off of the loop between the inverter 30 and the battery cluster 10. The loop switch serves as the overall switch of the battery cluster 10.

[0070] The loop signal acquisition circuit 220 is used for acquiring the electrical signals of the loop between the inverter 30 and the battery cluster 10. The loop signal acquisition circuit 220 can provide the overall operation state of the inverter 30 and the battery cluster 10 to the monitoring system of the stacked energy storage system. The loop signal acquisition circuit 220 can be used for acquiring various signals such as current, voltage, temperature, and power.

[0071] The acquisition signals of the loop signal acquisition circuit 220 can detect the operation of the overall battery cluster 10 and the inverter 30, i.e., for the loop of the entire stacked energy storage system. These detections of the inverter 30 need to be strongly associated with the control box 20. Once a fault is judged to occur, the circuit is protected by the control box 20, and the overall battery cluster 10 is cut off, which will affect the entire battery energy storage system, and if a misjudgment occurs, it will also cause a serious economic loss.

[0072] The acquisition signals of the loop signal acquisition circuit 220 can also include the charging and discharging states of the battery cluster 10, such as the current and power during the charging process, and the current and power during the discharging process. These acquisition signals of the loop signal acquisition circuit 220 can be used as a reference basis for the arc detection of the stacked energy storage system.

[0073] The detection signals of the detection components inside the battery cluster 10 are used for detecting the connection between the energy storage battery packs 110, and the influence range of the fault handling is small.

[0074] In some embodiments, the arc detection of the stacked energy storage system can use time domain analysis detection method and frequency domain analysis detection method. The time domain analysis detection method is based on the change of current, voltage and other signal waveforms for detection, which is simple and fast, but has certain limitations, and external interference has a greater impact on the accuracy of detection. The frequency domain analysis detection method distinguishes the arc characteristics by Fourier transform analysis of the characteristic value spectrum under the conditions of fault arc and no fault arc, so as to identify whether there is an arc.

[0075] In some embodiments, the method for arc detection using the detection signal of the stacked energy storage system of the present embodiment can include: collecting the current detection signal detected by the current detector 131; collecting the voltage detection signal detected by the voltage detector 132; and collecting the sound detection signal detected by the noise detector 133. The sound detection signal is preprocessed to obtain a noise feature dataset; the current detection signal and the voltage detection signal are preprocessed to obtain an electrical feature dataset; the noise feature dataset and the electrical feature dataset are input into a machine learning model; and the machine learning model is used for classification calculation to determine whether an arc occurs.

[0076] The machine learning model is trained based on a first detection signal sample dataset under the condition of reliable connection between the battery packs 110 and a second detection signal sample dataset under the condition of arc occurrence. The first detection signal sample dataset is the current data, voltage data and noise data of the battery cluster 10 under the normal operating state, which is pre-collected; and the second detection signal sample dataset is the current data, voltage data and noise data of the battery cluster 10 under the condition of arc occurrence, which is pre-collected. The current data is obtained by processing the current detection signal, the voltage data is obtained by processing the voltage detection signal, and the noise data is obtained by processing the sound detection signal.

[0077] In some embodiments, the first detection signal sample dataset and the second detection signal sample dataset further include charge and discharge state data. Considering the specific application scenarios and arrangement difficulties, the machine learning model can use a neural network model, such as a convolutional neural network (CNN), which processes the detection signal into data with a grid-like topology, extracts key features, effectively reduces the model parameters, and improves the speed of network recognition of key information. The convolutional neural network uses convolution, batch normalization, activation, pooling and other processing processes to form a convolutional layer for key feature extraction, and then sends it to a fully connected network for recognition and inference.

[0078] The machine learning model identifies the detection signal, which is trained based on the first detection signal sample dataset under the condition of reliable connection between the energy storage battery packs 110 and the second detection signal sample dataset under the condition of arc occurrence, and can accurately identify the direct current arc anomaly, has high recognition accuracy, and is conducive to wide application.

[0079] The pre-processing process of the sound signal is used to extract the characteristics of the signal, such as pitch (frequency), volume (loudness), tone (spectrum distribution), etc. In this embodiment, the noise feature data set obtained by the pre-processing process can reflect the characteristics of the sound signal frequency, energy density distribution, etc. For example, the noise feature data set can be in the form of a feature vector more suitable for convolutional neural networks.

[0080] In the case of determining that an arc occurs between the energy storage battery packs 110, the arc fault processing can also be performed by using the switching switches S1, S2, and S3. After determining that an arc occurs, the limit value can be set according to the influence degree of the arc, for example, the current limit value is set. When the arc occurs, if the current detection signal exceeds the current limit value, it is determined that the arc is serious, and the switching switches S1, S2, and S3 are controlled to switch the connection pins, for example, the standby connection pin 122 is used to replace the connection pin 122 connected between them.

[0081] In the case where the detection signal does not exceed the corresponding set limit value, a self-recovery adjustment instruction can be sent to the inverter 30 to perform a charge-discharge operation corresponding to the self-recovery adjustment instruction by the inverter 30. The charge-discharge operation can include repeated impacts of charge-discharge with different power limits, for example, periodic charge-discharge, and the charge-discharge power gradually increases, and through repeated impacts, the virtual connection that causes the arc is eliminated.

[0082] If the switching of the above-mentioned switching switches S1, S2, and S3 is performed or the inverter 30 completes the charge-discharge operation corresponding to the self-recovery adjustment instruction, the collection of the detection signal is re-executed and the arc judgment is performed, the battery cluster 10 can be stopped charging and discharging, and the arc prompt information is output.

[0083] The machine learning model is used to re-determine whether an arc occurs; if the arc still exists, the battery cluster 10 is stopped charging and discharging, and the arc prompt information is output.

[0084] Considering different charge-discharge states, the detection signal of the battery cluster 10 itself will also be different, for example, under different charging power and discharging power, the current detection signal, the voltage detection signal, and the sound during operation may be different. In the arc identification process, the charge-discharge state data of the battery cluster 10 can also be obtained, and the charge-discharge state data is used as one of the bases for arc identification.

[0085] The sound characteristics of the battery cluster 10 in different packaging forms (structure, material, size of the battery shell 140, fixing method of the energy storage battery pack, etc.) are different due to the differences in sound transmission path and sound transmission medium. The scheme of the embodiment can train machine learning models for battery clusters 10 of different specifications respectively, and the obtained machine learning models are smaller in size and more targeted. Accordingly, the step of obtaining the pre-trained machine learning model can include: obtaining the packaging form of the battery cluster 10; and selecting the corresponding machine learning model from the pre-configured model library according to the packaging form. The packaging form can include the specifications of the battery pack connection interface in the battery cluster, the structure of the shell, the material, etc. The model library is used to match and save the machine learning model corresponding to each packaging form of the battery cluster.

[0086] The stacked energy storage system of the embodiment utilizes the arc drawing detection between the energy storage battery packs 110, can identify the arc drawing inside the battery cluster 10, and further processes it on this basis to reduce the influence range of the arc drawing processing.

[0087] At this point, those skilled in the art should recognize that although the present application has been shown and described in detail in this paper, many other variants or modifications conforming to the principles of the present application can be directly determined or deduced according to the content disclosed in the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all these other variants or modifications.

Claims

1. A stacked energy storage system, characterized by, include: Multiple energy storage battery packs are stacked sequentially. A connector is disposed between adjacent energy storage battery packs and includes multiple sets of connecting pins for connecting adjacent energy storage battery packs; A detection component, disposed at the connector, is used to collect detection signals during the charging and discharging process of the stacked energy storage system, so as to use the detection signals to determine whether the connection pin is arcing; A circuit breaker is connected to multiple sets of the aforementioned connection pins, and is used to disconnect the connection pins in the event of arcing.

2. The stacked energy storage system of claim 1, wherein, The connector includes: A connector is connected to an electrode interface of one of the adjacent energy storage battery packs, and includes multiple connector holes that correspond one-to-one with the multiple sets of connector pins. The connector connects to the electrode interface of another adjacent energy storage battery pack and is pluggably connected to the connector base. Multiple sets of the connecting pins are disposed on the connector head and are connected to the multiple connecting sockets when the connector head is inserted into the connector socket.

3. The stacked energy storage system of claim 2, wherein, The circuit breaker includes multiple switching nodes, and each switching node is connected in series between a set of connection pins and the corresponding electrode interface.

4. The stacked energy storage system of claim 3, wherein, Each of the aforementioned energy storage battery packs also includes: The battery manager, connected to the control terminal of the circuit breaker connected to this energy storage battery pack, is used to send a disconnect signal to the control terminal in the event of the arcing, so as to disconnect the corresponding switch node.

5. The stacked energy storage system of claim 4, wherein, The detection component includes: A current detector is connected between the connection socket and the corresponding electrode interface and is used to detect the magnitude of the current in the circuit to obtain a current detection signal. A voltage detector is connected to both the connection socket and the connection pin, and is used to detect the voltage at the connection point between the connection socket and the connection pin to obtain a voltage detection signal.

6. The stacked energy storage system of claim 5, wherein, The detection component also includes: A noise detector is disposed at the connector and is used to detect the sound signal at the connection between the connector and the connector pin to obtain a sound detection signal.

7. The stacked energy storage system of any one of claims 1 to 6, wherein, Also includes: An inverter, connected to the energy storage battery pack, is used to convert the electrical energy of the energy storage battery pack. A control box, connected between the inverter and the energy storage battery pack, is used to control the connection between the energy storage battery pack and the inverter.

8. The stacked energy storage system of claim 7, wherein, The control box includes: A circuit switch is used to control the connection and disconnection of the circuit between the inverter and the energy storage battery pack; The loop signal acquisition loop is used to acquire the loop electrical signals between the inverter and the energy storage battery pack.

9. The stacked energy storage system of claim 7, wherein, It also includes a battery casing, and Multiple energy storage battery packs are stacked sequentially inside the battery housing to form a battery cluster; the end cap of the housing has an energy input / output interface, and the control box is connected to the energy input / output interface.

10. The stacked energy storage system according to any one of claims 1 to 6, characterized in that, Each connector includes three sets of parallel connecting pins, and the circuit breaker is connected to each of the three sets of connecting pins.

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