Energy storage system and power source apparatus

Abstract

An energy storage system and a power source apparatus, which belong to the technical field of power sources. The energy storage system comprises: a general positive line, a general negative line and a battery module connected between the general positive line and the general negative line, and the battery module comprises M battery assemblies (11) connected in series. The energy storage system further comprises: N supporting members (12), wherein the M battery assemblies (11) are supported by means of the N supporting members (12), and the M battery assemblies (11) are insulated from the N supporting members (12). The energy storage system further comprises: a conductive path, wherein K supporting members (12) among the N supporting members (12) are connected to the conductive path by means of K branches, respectively, M, N and K are all positive integers, and M≥N≥K>1. A protective assembly (13) is arranged on the conductive path and / or the branch in series. Thus, a short-circuit current is expected to be reduced when double-point insulation of a cross-electrical-box (a supporting member) fails, and the possibility of initiating high-voltage ignition and battery combustion and explosion is reduced.

Description

Energy storage system and power supply device

[0001] This application claims priority to the Chinese patent application with application number 202323118929.8, filed with the Patent Office of China on November 20, 2023, and with the invention name “Energy Storage Circuit and Power Supply Device”. This application also claims priority to the international patent application with application number PCT / CN2023 / 129688, filed on November 3, 2023, and with the invention name “Energy Storage Circuit and Power Supply Device”. The entire contents of both applications are incorporated herein by reference. Technical Field

[0002] The present application belongs to the field of power supply technology, and in particular relates to an energy storage system and a power supply device. Background Art

[0003] The relevant energy storage system includes multiple battery packs connected in series and / or in parallel. Its short-circuit protection method is to set a fuse at the positive electrode or the negative electrode of the energy storage system, or to set a fuse inside each battery pack. These two methods can only reduce the possibility of serious safety failures such as battery combustion and explosion when a short circuit occurs between the positive electrode and the negative electrode of the energy storage system. However, when a double-point insulation failure occurs across the electrical box (support), that is, when insulation failure occurs in the two electrical boxes respectively, the voltage difference is high and the short-circuit current is extremely large, which can easily cause serious safety problems such as high-voltage ignition and battery combustion and explosion.

[0004] Therefore, the relevant energy storage system cannot reduce the safety risk in the event of double-point insulation failure across the electrical box.

[0005] Application Contents

[0006] In view of the above problems, the present application provides an energy storage system and a power supply device, aiming to solve the problem that the related energy storage system cannot reduce the safety risk in the event of double-point insulation failure across the electrical box. Technical Solutions

[0007] The technical solution adopted in the embodiment of this application is:

[0008] In a first aspect, the present application provides an energy storage system according to an embodiment of the present application, comprising a total positive line, a total negative line, and a battery module connected between the total positive line and the total negative line, wherein the energy storage system is configured to output electrical energy from the battery module through the total positive line and the total negative line, and / or the energy storage system is configured to input electrical energy to the battery module through the total positive line and the total negative line;

[0009] The battery module includes M battery modules connected in series;

[0010] The energy storage system further includes N supporting members, the M battery modules are supported by the N supporting members, and the M battery assemblies are insulated from the N supporting members;

[0011] The energy storage system further includes a conductive path, wherein K support members among the N support members are respectively connected to the conductive path through K branches, wherein M, N, and K are all positive integers, and M≥N≥K>1;

[0012] A protection component is arranged in series on the conductive path and / or the branch.

[0013] In the technical solution of the embodiment of the present application, since the battery assembly is insulated from the support member, K of the N support members are connected to the conductive path through K branches respectively, and the protection component is arranged on the conductive path and / or the branch, so that in the event of double-point insulation failure across the electrical box (support member), that is, in the event of insulation failure in the support member, the protection component is connected in series between the two support members with insulation failure. Since the protection component affects the current between the N support members, it plays a protective role, reduces the short-circuit current, and reduces the possibility of high-voltage ignition and battery combustion and explosion.

[0014] In some embodiments, the K branches are connected to the conductive path to form K nodes;

[0015] The protection component includes at least one first sub-protection component, the number of the at least one first sub-protection component is ≤K-1, and one or zero of the at least one first sub-protection component is connected in series between any two adjacent nodes among the K nodes.

[0016] By adopting the above solution, the number of first sub-protection components to be configured can be reduced, saving costs.

[0017] In some embodiments, the number of the at least one first sub-protection component is K-1, and one of the at least one first sub-protection component is connected in series between any two adjacent nodes among the K nodes.

[0018] By adopting the above solution, a first sub-protection component is provided between each adjacent support member. When insulation failure occurs in any two support members, there is a sub-protection component to affect the short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0019] In some embodiments, the conductive path includes K-1 sub-paths formed by the K nodes, a target sub-path is provided for every m sub-paths, and the target sub-path is connected in series with the first sub-protection component, where m is a natural number.

[0020] By adopting the above solution, the first sub-protection component can be set every 0 to multiple sub-paths, thereby improving the flexibility of the configuration of the first protection component.

[0021] In some embodiments, m is 0, the number of the at least one first sub-protection component is K-1, and the K-1 first sub-protection components are respectively connected in series on the K-1 sub-passes.

[0022] By adopting the above solution, a first sub-protection component is provided between each adjacent support member. When insulation failure occurs in any two support members, there is a sub-protection component to affect the short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0023] In some embodiments, the resistance values ​​of the first sub-protection components are equal.

[0024] By adopting the above solution, the pressure difference between each adjacent support member is equal. In the event of insulation failure in two support members, the stability of the current limiting effect of one or more first sub-protection components is improved, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0025] In some embodiments, the energy storage system further comprises:

[0026] A plurality of first capacitive components are connected in parallel with the plurality of first sub-protection components in a one-to-one correspondence.

[0027] By adopting the above solution, in the event of lightning strikes, surges, etc., each first capacitive component suppresses the voltage spike on each first sub-protection component, reducing the possibility of breakdown of the first sub-protection component and improving the reliability of the energy storage system. At the same time, the spike voltage between the total positive line and the total negative line is filtered out, thereby improving the stability of the energy storage system.

[0028] In some embodiments, the capacitance of each of the first capacitive components is equal.

[0029] By adopting the above solution, the capacitance values ​​of the first capacitive components are equal, so that the peak voltage suppression capabilities at both ends of the first sub-protection components are the same, further improving the stability and reliability of the energy storage system.

[0030] In some embodiments, the positive pole of the first battery assembly is connected to the total positive circuit, and the first branch among the K branches is connected to the first node formed by the conductive path and connected to the total positive circuit; the negative pole of the Mth battery assembly is connected to the total negative circuit, and the Kth branch among the K branches is connected to the Kth node formed by the conductive path and connected to the total negative circuit.

[0031] By adopting the above solution, the protection components form a voltage-equalizing chain, which provides the possibility of serving as a voltage-dividing resistor, thereby eliminating the need to set a voltage-dividing resistor, simplifying the hardware design, and saving costs.

[0032] In some embodiments, the energy storage system further includes two second sub-protection components;

[0033] A second sub-protection component is connected in series between the first node and the total positive line, and between the Kth node and the total negative line, respectively.

[0034] By connecting a second sub-protection component in series between the first node and the total positive line and between the Kth node and the total negative line, in the event of insulation failure of the first support member and / or the Nth support member, there is a sub-protection component to affect the short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0035] In some embodiments, an isolation switch module, a relay module, and a filter module are sequentially connected in series to the total positive line and the total negative line; the filter module is configured to filter the first direct current output by the battery module;

[0036] The second sub-protection component is connected to the isolation switch module; or

[0037] The second sub-protection component is connected to the isolation switch module and the relay module; or

[0038] The second sub-protection component is connected to the filter module.

[0039] By sequentially connecting the isolating switch module, the relay module, and the filter module in series on the total positive line and the total negative line, the stability of the first DC power is improved, and the flexibility of the first DC power output is improved; the second sub-protection component is connected to different positions on the total positive line and the total negative line, thereby improving the flexibility of the energy storage system protection.

[0040] In some embodiments, when the resistance value of each of the first sub-protection components is the first resistance value R, the resistance value of each of the second sub-protection components is half or twice the first resistance value R.

[0041] By adopting the above scheme, the pressure difference between each adjacent support member is equal. When insulation failure occurs in two support members respectively, the stability of the current limiting effect of one or more first sub-protection components is improved, and the possibility of high-voltage ignition and battery combustion and explosion is further reduced; at the same time, the pressure difference between the first support member and the total positive line and the pressure difference between the nth support member and the total negative line can be set to half of the voltage drop on each first sub-protection component, so as to further improve the stability of the current limiting effect of the equalizing chain and further reduce the possibility of high-voltage ignition and battery combustion and explosion, or the pressure difference between the first support member and the total positive line and the pressure difference between the nth support member and the total negative line can be set to several times the voltage drop on each first sub-protection component to distinguish voltages and facilitate insulation detection.

[0042] In some embodiments, the energy storage system further comprises:

[0043] A plurality of second capacitive components are connected in parallel with the plurality of second sub-protection components in a one-to-one correspondence.

[0044] By adopting the above solution, in the event of lightning strikes, surges, etc., each second capacitive component suppresses the voltage spike on each second sub-protection component, reducing the possibility of breakdown of the second sub-protection component and improving the reliability of the energy storage system. At the same time, the spike voltage between the total positive line and the total negative line is filtered out, thereby improving the stability of the energy storage system.

[0045] In some embodiments, when the capacitance of each first capacitive component connected in parallel with each first sub-protection component is the first capacitance C, the capacitance of each second capacitive component is half of the first capacitance C.

[0046] By adopting the above solution, the capacitance values ​​of the first capacitive components are equal, so that the peak voltage suppression capabilities at both ends of the first current limiting components are the same, further improving the stability and reliability of the energy storage system.

[0047] In some embodiments, the protection component includes at least one third sub-protection component, the number of the third sub-protection components is ≤K, and at least one third sub-protection component is respectively connected in series to at least one branch of the K branches.

[0048] By adopting the above solution, the third sub-protection components are set on K branches. In the event of double-point insulation failure across the electrical box (support), the short-circuit current is affected, reducing the possibility of high-voltage ignition and battery combustion and explosion, while making the wiring more flexible; at the same time, the number of third sub-protection components configured can be reduced, saving costs.

[0049] In some embodiments, the protection component includes K third sub-protection components, and the K third sub-protection components are respectively connected in series to the K branches.

[0050] By adopting the above solution, a third sub-protection component is provided between each adjacent support member. In the event of insulation failure in any two support members, at least two third protection components are provided to protect against short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0051] In some embodiments, the resistance values ​​of the third sub-protection components are equal.

[0052] By adopting the above solution, the pressure difference between each adjacent support member is equal. In the event of insulation failure in two support members, the stability of the current limiting effect is improved, and the possibility of high-voltage ignition and battery combustion and explosion is further reduced.

[0053] In some embodiments, the energy storage system further comprises:

[0054] A plurality of third capacitive components are connected in parallel in a one-to-one correspondence with the at least one third sub-protection component.

[0055] By adopting the above solution, in the event of lightning strikes, surges, etc., each third capacitive component suppresses the voltage spikes on each third sub-protection component, reducing the possibility of breakdown of the third sub-protection component and improving the reliability of the energy storage system. At the same time, the spike voltage between the total positive line and the total negative line is filtered out, thereby improving the stability of the energy storage system.

[0056] In some embodiments, one or more of the N supports are connected to an electrical platform.

[0057] By adopting the above solution, the voltage balancing chain including the protection component can also serve as a voltage dividing resistor, thereby eliminating the need to set up a voltage dividing resistor, simplifying the hardware design and saving costs.

[0058] In some embodiments, when N is an even number, the N / 2th support member is connected to the electrical platform;

[0059] When N is an odd number, the (N+1) / 2th support member is connected to the electric platform.

[0060] By adopting the above solution, the middlemost support member is connected to the electrical platform. Therefore, when the electrical platform is grounded, the maximum value of the absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line are minimized, further improving the safety and reliability of the energy storage system.

[0061] In some embodiments, the energy storage system further includes a first supporting device, the first supporting device being configured to support the N supporting members, the first supporting device being connected to the electric platform.

[0062] By adopting the above solution, since the first supporting device is connected to the electric platform, the convenience of wiring is improved, there is no need to configure different protection methods for various working conditions, and the first supporting device is in a non-suspended state, so the protection method is simple.

[0063] In some embodiments, one of the total positive line, the total negative line, and the conductive path is connected to the electrical platform.

[0064] By adopting the above solution, the flexibility of wiring is improved, and different protection modes can be configured for various working conditions.

[0065] In some embodiments, the energy storage system further includes two second voltage dividing components;

[0066] Two of the second voltage dividing components are connected in series between the total positive circuit and the total negative circuit;

[0067] The middle nodes of the two second voltage-dividing components are connected to the electric platform.

[0068] By adopting the above solution, by providing two second voltage-dividing components and clamping the common point of the two second voltage-dividing components at the potential of the electric platform, the safety of the energy storage system is improved, and the maximum value of the absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line are minimized, further improving the safety and reliability of the energy storage system.

[0069] In some embodiments, the energy storage system further comprises:

[0070] The conversion circuit is connected to the total positive line and the total negative line, and is configured to convert the first direct current output by the battery module to output alternating current.

[0071] By adopting the above solution, the first direct current is converted into alternating current to achieve alternating current output of the energy storage module.

[0072] In some embodiments, the protection component is a current limiting component, and the current limiting component is used to limit the current generated in the conductive path; or

[0073] The protection component is an overcurrent protection component, and the overcurrent protection component is used to perform overcurrent protection on the conductive path.

[0074] By adopting the above solution, the protection component can be a current limiting component or an overcurrent protection component, which improves the flexibility of the protection component configuration.

[0075] In a second aspect, an embodiment of the present application further provides a power supply device, which includes a load and the above-mentioned energy storage system.

[0076] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. Beneficial effects

[0077] The first aspect of the beneficial effect provided by the embodiment of the present application is that: in the technical solution of the embodiment of the present application, since the battery assembly is insulated from the support member; K support members among the N support members are respectively connected to the conductive path through K branches, and the protection component is set on the conductive path and / or the branch, so that in the case of double-point insulation failure across the electrical box (support member), that is, when insulation failure occurs in the support member respectively, the protection component is connected in series between the two support members with insulation failure. Since the protection component affects the current between the N support members, it plays a protective role, reduces the short-circuit current, and reduces the possibility of causing high-voltage ignition and battery combustion and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0079] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0080] FIG1 is a schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0081] FIG2 is another structural diagram of an energy storage system provided in one embodiment of the present application;

[0082] FIG3 is another structural diagram of an energy storage system provided in one embodiment of the present application;

[0083] FIG4 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0084] FIG5 is a schematic diagram of a partial circuit example of an energy storage system provided in one embodiment of the present application;

[0085] FIG6 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0086] FIG7 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0087] FIG8 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0088] FIG9 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0089] FIG10 is another structural diagram of an energy storage system provided in one embodiment of the present application;

[0090] FIG11 is another structural diagram of an energy storage system provided in one embodiment of the present application;

[0091] FIG12 is another structural diagram of an energy storage system provided in one embodiment of the present application;

[0092] FIG13 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0093] FIG14 is another schematic diagram of a partial circuit example of an energy storage system provided in one embodiment of the present application;

[0094] FIG15 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0095] FIG16 is another schematic diagram of a partial circuit example of an energy storage system provided in one embodiment of the present application;

[0096] FIG17 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0097] FIG18 is another schematic diagram of a partial circuit example of an energy storage system provided in one embodiment of the present application;

[0098] FIG19 is another schematic structural diagram of an energy storage system provided in one embodiment of the present application;

[0099] FIG20 is another schematic diagram of a partial circuit example of an energy storage system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0100] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0101] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0102] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0103] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0104] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0105] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0106] Currently, market developments indicate that energy storage systems are becoming increasingly widespread. They are widely used in transmission and distribution grids. As their application areas continue to expand, market demand for them is also growing.

[0107] With the widespread application of energy storage power systems in transmission and distribution networks, solving the power supply problem of equipment has become a current social issue. Energy storage systems have attracted attention due to the safety and reliability of their discharge. The relevant energy storage system includes a total positive line and a total negative line, and a battery module connected between the total positive line and the total negative line, and the battery module has multiple battery packs connected in series in sequence; each battery pack includes a first metal shell, a second metal shell arranged in the first metal shell, and a battery cell group arranged in the second metal shell, and the first metal shell and the second metal shell are insulated; a protective resistor is connected between the first metal shell and the second metal shell in each battery pack, and the first metal shell in each battery pack is grounded; thereby suppressing short-circuit current. However, this energy storage system can only suppress short-circuit current when insulation failure occurs in a single electrical box, and cannot reduce short-circuit current in the case of double-point insulation failure across the electrical box (such as a support member), resulting in poor safety and reliability.

[0108] In order to solve the problem of being unable to reduce the short-circuit current in the event of a double-point insulation failure across the electrical box (for example, a support member), the applicant has discovered that a conductive path can be set in the design, the conductive path including K nodes in series, K support members connected to the K nodes through K paths respectively, and a protective component set on the conductive path and / or the path; in order to affect the current between two or more support members through the protective component, thereby improving the safety and reliability of the energy storage system.

[0109] According to some embodiments of the present application, referring to FIG1 , FIG1 shows a schematic structural diagram of an energy storage system provided by an embodiment of the present application. For ease of illustration, only parts related to the present embodiment are shown, which are described in detail as follows:

[0110] The energy storage system includes a total positive line, a total negative line, and a battery module connected between the total positive line and the total negative line. The energy storage system is configured to output electrical energy from the battery module through the total positive line and the total negative line, and / or the energy storage system is configured to input electrical energy to the battery module through the total positive line and the total negative line.

[0111] The battery module includes M battery assemblies 11 connected in series.

[0112] The energy storage system further includes N supporting members, the M battery modules 11 are supported by the N supporting members, and the M battery assemblies 11 are insulated from the N supporting members;

[0113] The energy storage system further includes a conductive path, wherein K support members among the N support members are connected to the conductive path through K branches, respectively, where M, N, and K are all positive integers, and M≥N≥K>1;

[0114] A protection component 13 is provided on the conductive path and / or branch circuit.

[0115] The protection component 13 includes an electrical protection component, which is used to affect the electrical performance between the N supporting members, and the electrical performance includes potential or current.

[0116] In one embodiment, K supporting members out of the N supporting members are connected in common via K branches.

[0117] As an example, the first battery assembly in the battery assemblies in series is supported by the first support assembly, and the Mth battery assembly in the battery assemblies in series is supported by the Nth support assembly; as another example, every two battery assemblies in the M battery assemblies are supported by one of the N support members, wherein the first battery assembly and the second battery assembly are supported by the first support member, the third battery assembly and the fourth assembly are supported by the second support member, and the M-1th battery assembly and the Mth battery assembly are supported by the Nth support member.

[0118] It is worth emphasizing that the energy storage system, in one embodiment, can be an energy storage circuit.

[0119] It will be understood that the main positive and negative lines are used to input or output power. The battery assembly 11 includes one or more battery cells connected in parallel and / or in series. The support member 12 is used to house and / or support the battery assembly. The support member may, for example, include a housing and / or a cold plate. Both the housing and the cold plate may be made of metal. As an example, the support member is an electrical box that houses and supports the battery assembly. It is worth noting that the cold plate is a battery cold plate. For example, a thin plate located below the battery assembly 11 serves to conduct heat away from the battery, maintaining a stable temperature and thereby improving battery efficiency. Each support member 12 can support one or more battery assemblies 11. Both the branch circuit and the conductive path may be conductive circuits, or may include conductive circuits and other conductive components. The protection assembly 13 may include a current limiting assembly and an overcurrent protection assembly. It should be noted that Figure 1 only illustrates the protection assembly 13, and that the protection assembly 13 is only positioned between adjacent nodes and connected in series to each path.

[0120] In the technical solution of the embodiment of the present application, since the battery assembly 11 is insulated from the support member 12; K support members among the N support members are respectively connected to the conductive path through K branches, and the protection component is set on the conductive path and / or the branch, so that in the case of double-point insulation failure across the electrical box (support member), that is, when insulation failure occurs in the support member 12 respectively, if the protection component 13 is connected in series between the two support members 12 with insulation failure, the protection component 13 affects the current between the N support members 12, thereby playing a protective role, affecting the short-circuit current, and reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0121] According to some embodiments of the present application, optionally, as shown in Figure 2, K branches are connected to the conductive path to form K nodes X; the protection component 13 includes at least one first sub-protection component 131, the number of at least one first sub-protection component 131 is ≤K-1, and any two adjacent nodes among the K nodes are connected in series with 1 or 0 of the at least one first sub-protection component 131.

[0122] It is understandable that the first sub-protection assembly 131 can be connected in series to any two nodes X. When there are two support members 12, there is one first sub-protection assembly 131; when there are three or more support members 12, there can be one or more first sub-protection assemblies 131.

[0123] By adopting the above solution, the number of first sub-protection components 131 configured can be reduced, saving costs.

[0124] In some embodiments, the number of the at least one first sub-protection component 131 is K-1, and any two adjacent nodes among the K nodes X are connected in series with one of the at least one first sub-protection component 131 .

[0125] It can be understood that any two adjacent nodes among the K nodes X share K-1 sub-paths, and the number of at least one first sub-protection component 131 is K-1, so each sub-path is connected to a first sub-protection component 131.

[0126] By adopting the above solution, a first sub-protection component 131 is provided between each adjacent support member. When insulation failure occurs in any two support members, one sub-protection component will affect the short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0127] According to some embodiments of the present application, optionally, the conductive path includes K-1 sub-paths formed by the K nodes, a target sub-path is provided every m sub-paths, and the target sub-path is connected in series with the first sub-protection component 131, where m is a natural number.

[0128] It can be understood that at this time, the first sub-protection components 131 are evenly distributed among the multiple support members 12. Due to the protective effect of one or more first sub-protection components 131, the short-circuit current is reduced, and the evenly distributed first sub-protection components 131 further reduce the possibility of causing high-voltage ignition and battery combustion and explosion.

[0129] By adopting the above solution, the first sub-protection component 131 can be set every 0 to multiple sub-paths, thereby improving the flexibility of the configuration of the first protection component.

[0130] According to some embodiments of the present application, optionally, m is 0, the number of at least one first sub-protection component 131 is K-1, and K-1 first sub-protection components 131 are respectively connected in series on K-1 sub-paths.

[0131] It is understandable that a first sub-protection component 131 is provided between each adjacent support member 12 , so when insulation failure occurs in any two support members 12 , one or more sub-protection components will affect the short-circuit current.

[0132] By adopting the above solution, a first sub-protection component 131 is provided between each adjacent support member 12. When insulation failure occurs in any two support members 12, there is a sub-protection component to affect the short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0133] According to some embodiments of the present application, optionally, the positive pole of the first battery assembly 11 is connected to the total positive circuit, and the first branch among the K branches is connected to the first node formed by the conductive path and connected to the total positive circuit; the negative pole of the Mth battery assembly 11 is connected to the total negative circuit, and the Kth branch among the K branches is connected to the Kth node formed by the conductive path and connected to the total negative circuit.

[0134] It can be understood that the connection of the 1st node and the Kth node to the total positive and total negative respectively includes direct connection and connection via the 1st support member or the Kth support member respectively.

[0135] The configuration of the sub-protection components is simplified between the total positive line and the first support member, and the configuration of the sub-protection components is also simplified between the total negative line and the Nth support member, saving hardware costs.

[0136] By adopting the above solution, the protection components form a voltage-equalizing chain, which provides the possibility of serving as a voltage-dividing resistor, thereby eliminating the need to set a voltage-dividing resistor, simplifying the hardware design, and saving costs.

[0137] According to some embodiments of the present application, optionally, please continue to refer to FIG3 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is detailed as follows:

[0138] In addition to all the components and assemblies of the energy storage system shown in FIG1 , the energy storage system further includes two second sub-protection assemblies 132 .

[0139] A second sub-protection component 132 is connected in series between the first node and the total positive line, and between the Kth node and the total negative line.

[0140] The second sub-protection component 132 is used to affect the current between the first support member 12 and the total positive line and the current between the Nth support member 12 and the total negative line.

[0141] It should be noted that the second sub-protection component 132 may include a second resistance component or a second overcurrent component.

[0142] The first sub-protection component 131 and the two second sub-protection components 132 form a voltage balancing chain to balance the voltage between each two adjacent support members 12 .

[0143] By connecting a second sub-protection component 132 in series between the first node and the total positive line and between the Kth node and the total negative line, in the event of insulation failure of the first support member 12 and / or the Nth support member 12, there is a protection component that affects the short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0144] According to some embodiments of the present application, optionally, please continue to refer to FIG4 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is described in detail as follows:

[0145] In addition to all the components and assemblies of the energy storage system shown in FIG3 , the above energy storage system includes an isolating switch module 108 , a relay module 208 , and a filter module 48 connected in series on the total positive line and the total negative line; the filter module 48 is configured to filter the first DC power output by the battery module;

[0146] The second sub-protection assembly 132 is only connected to the isolation switch module 108; or

[0147] The second sub-protection assembly 132 is connected to the isolation switch module 108 and the relay module 208; or

[0148] The second sub-protection component 132 is connected to the filter module 48 .

[0149] When the second sub-protection component 132 is only connected to the isolation switch module 108, the convenience of wiring is improved, there is no need to configure different protection methods for various working conditions, and the voltage equalizing chain is in a non-suspended state, and the protection method is simple.

[0150] When the second sub-protection component 132 is connected to the isolation switch module 108 and the relay module 208, disconnecting the isolation switch module 108 can disconnect the voltage of the voltage balancing chain, thereby improving safety. However, the voltage balancing chain is in a suspended state.

[0151] When the second sub-protection assembly 132 and the filter module 48 are connected together, the voltage balancing chain is connected to the AC side of the energy storage system, and the voltage balancing chain is in a non-suspended state.

[0152] In a specific implementation, as shown in FIG5 , the isolating switch module 108 includes a first isolating switch KG1 and a second isolating switch KG2 ; the first isolating switch KG1 is connected in series to the total positive line, and the second isolating switch KG2 is connected in series to the total negative line.

[0153] The relay module 208 includes a pre-charge component connected in series on the total positive line and a first relay K1 connected in series on the total negative line; wherein the pre-charge component includes a second relay K2, a third relay K3 and a first resistor R1; the third relay K3 and the first resistor R1 are connected in series and then connected in parallel with the second relay K2.

[0154] The filter module 48 includes a first inductor L1, a second inductor L2 and a first capacitor C1; the first inductor L1 is connected in series to the total positive line, the second inductor L2 is connected in series to the total negative line; the first capacitor C1 is connected between the total positive line and the total negative line.

[0155] By sequentially connecting the isolating switch module, the relay module and the filter module in series on the total positive line and the total negative line, the stability of the first direct current is improved, and the flexibility of the first direct current output is improved; the first support member and the second sub-protection component are connected to different positions on the total positive line and the total negative line, thereby improving the flexibility of energy storage system protection.

[0156] In some embodiments, the resistance values ​​of the first sub-protection components are equal.

[0157] It can be understood that, since the resistance values ​​of the first sub-protection components are equal, the voltage drops across the first sub-protection components are equal.

[0158] The resistance of each second sub-protection component may be less than or equal to the resistance of the first sub-protection component; or

[0159] The resistance value of each second sub-protection component is a preset multiple of the resistance value of the first sub-protection component, and the preset multiple can be 1.5, 2, 2.5 and 3.

[0160] By adopting the above solution, the pressure difference between each adjacent support member 12 is equal. In the event of insulation failure in two support members 12, the stability of the current limiting effect of one or more first sub-protection components is improved, and the possibility of high-voltage ignition and battery combustion and explosion is further reduced.

[0161] In some embodiments, when the resistance value of each of the first sub-protection components is the first resistance value R; when m is greater than 0, the resistance value of each of the first sub-protection components is the first configuration resistance value mR.

[0162] It can be understood that the resistance value of each second sub-protection component 132 can be half of the first resistance value. The pressure difference between each adjacent support member 12 is Vbus / n; the pressure difference between the first support member 12 and the total positive line is Vbus / 2n; the pressure difference between the nth support member 12 and the total negative line is Vbus / 2n; wherein Vbus / is the pressure difference between the total negative line and the total positive line. Thus, the first sub-protection component and the second sub-protection component achieve pressure difference balance between each adjacent support member 12. Thus, the pressure difference between each adjacent support member 12 is equal, and the pressure difference between the first support member 12 and the total positive line and the pressure difference between the nth support member 12 and the total negative line are both half of the pressure difference between adjacent support members 12, further improving the stability of the current limiting effect of the voltage equalization chain and further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0163] It is understandable that the resistance of each second sub-protection component can also be twice the first preset resistance, so as to achieve the purpose of voltage differentiation and facilitate insulation detection.

[0164] When m is greater than 0, the voltage drop of each of the first sub-protection components is m*Vbus / n, the pressure difference between the first support member 12 and the total positive line is Vbus / 2n; the pressure difference between the nth support member 12 and the total negative line is Vbus / 2n.

[0165] By adopting the above solution, the pressure drops on each first sub-protection component are equal, and the pressure difference between the first support member 12 and the total positive line and the pressure difference between the nth support member 12 and the total negative line are both half of one mth of the pressure drop on each first sub-protection component 131, which further improves the stability of the current limiting effect of the voltage equalizing chain and further reduces the possibility of high-voltage ignition and battery combustion and explosion.

[0166] According to some embodiments of the present application, optionally, please continue to refer to FIG6 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is detailed as follows:

[0167] In addition to all the components and assemblies of the energy storage system shown in FIG3 , the energy storage system further includes a plurality of first capacitive components 15 .

[0168] The plurality of first capacitive components 15 are connected in parallel with the plurality of first sub-protection components in a one-to-one correspondence.

[0169] In the event of lightning strikes, surges, and the like, a peak current may appear on each first sub-protection component, and each first capacitive component 151 suppresses the peak voltage on each first sub-protection component.

[0170] By adopting the above solution, in the event of lightning strikes, surges, etc., each first capacitive component suppresses the voltage spikes on each sub-protection component, reducing the possibility of breakdown of the first sub-protection component and improving the reliability of the energy storage system. At the same time, the spike voltage between the total positive line and the total negative line is filtered out, thereby improving the stability of the energy storage system.

[0171] According to some embodiments of the present application, optionally, please continue to refer to FIG7 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is described in detail as follows:

[0172] In addition to all the components and assemblies of the energy storage system shown in FIG6 , the energy storage system further includes a plurality of second capacitive components 16 .

[0173] The plurality of first capacitive components 15 are connected in parallel with the plurality of first sub-protection components 131 in a one-to-one correspondence; the plurality of second capacitive components 16 are connected in parallel with the plurality of second sub-protection components 132 in a one-to-one correspondence.

[0174] In the event of lightning strikes, surges, and the like, a spike current may appear on each second sub-protection component 132 , and each second capacitive component 16 suppresses the spike voltage on each second sub-protection component 132 .

[0175] By adopting the above solution, in the event of lightning strikes, surges, etc., each second capacitive component 16 suppresses the voltage spike on each second sub-protection component 132, reducing the possibility of breakdown of the second sub-protection component 132 and improving the reliability of the energy storage system. At the same time, it filters out the spike voltage between the total positive line and the total negative line, thereby improving the stability of the energy storage system.

[0176] In some embodiments, the capacitances of the first capacitive components are equal.

[0177] Since the quotient of the capacitance of the first capacitive component and the resistance of the corresponding first sub-protection component is the same, the peak voltage suppression capability of the voltage between the various support members 12 is the same.

[0178] By adopting the above solution, the capacitance values ​​of the first capacitive components are equal, so that the peak voltage suppression capabilities at both ends of the first sub-protection components are the same, further improving the stability and reliability of the energy storage system.

[0179] In some embodiments, when the capacitance of each first capacitive component connected in parallel with each first sub-protection component is the first capacitance C, the capacitance of each second capacitive component is half of the first capacitance C.

[0180] In one embodiment, when m is 0, the capacitance of each first capacitive component 15 is the first capacitance; and the capacitance of each second capacitive component 16 is half of the first capacitance.

[0181] In one embodiment, when m is greater than 0, the capacitance of each first capacitive component 15 is m times the first capacitance.

[0182] Since the quotient of the capacitance of each capacitive component and the resistance of the corresponding sub-protection component is the same, the peak voltage suppression capability of the voltage between each support member 12 is the same.

[0183] By adopting the above solution, the capacitance values ​​of the first capacitive components 15 are equal, so that the peak voltage suppression capabilities between the support members 12 are the same, further improving the stability and reliability of the energy storage system.

[0184] According to some embodiments of the present application, optionally, please continue to refer to FIG8 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is described in detail as follows:

[0185] In addition to all the components and assemblies of the energy storage system shown in FIG2 , the energy storage system further includes a second supporting device 30 and two first voltage dividing assemblies 18 ;

[0186] Two first voltage dividing components 18 are connected in series between the total positive line and the total negative line;

[0187] The two first voltage-dividing components 18 and the second supporting device 30 are connected to the electrical platform.

[0188] It can be understood that the resistance values ​​of the two first voltage-dividing components 18 are the same. By connecting the two first voltage-dividing components 18 and the second supporting device 30 to the electrical platform, the voltage between the electrical platform and the total positive line is the first voltage, and the voltage between the electrical platform and the total negative line is the second voltage. The first voltage and the second voltage are equal. When the electrical platform is grounded, the absolute value of the potential of the total positive line and the absolute value of the potential of the total negative line are minimized.

[0189] By adopting the above solution, by providing two first voltage-dividing components 18 and a second supporting device 30, and clamping the common point of the two first voltage-dividing components 18 and the second supporting device 30 at the potential of the electric platform, the safety of the energy storage system is improved, and the maximum value of the absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line is minimized, further improving the safety and reliability of the energy storage system.

[0190] According to some embodiments of the present application, optionally, please continue to refer to FIG9 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is detailed as follows:

[0191] In addition to all the components and assemblies of the energy storage system shown in FIG8 , the energy storage system further includes a plurality of fourth capacitive components 17 .

[0192] Each first sub-protection component is connected in parallel with each fourth capacitive component 17 .

[0193] In a specific implementation, the resistance of each first sub-protection component is the same, and the capacitance of each fourth capacitive component 17 is the same, so that the voltage drop across each first sub-protection component is the same, and the peak voltage suppression capability across each first sub-protection component is the same.

[0194] By adopting the above solution, in the event of lightning strikes, surges, etc., each fourth capacitive component 17 suppresses the peak voltage of the voltage on each first sub-protection component, reducing the possibility of breakdown of the first sub-protection component and improving the reliability of the energy storage system.

[0195] According to some embodiments of the present application, optionally, as shown in FIG10 , the protection component includes at least one third sub-protection component, the number of third sub-protection components is ≤K, and at least one of the third sub-protection components is respectively connected in series to at least one branch of the K branches.

[0196] It is understood that any number of third sub-protection components can be connected in series to any branch. Figure 10 only illustrates the case where the third sub-protection components are connected in series to each branch. It should be noted that only when the third sub-protection components are connected in series to K branches, each node X on the conductive path has the same potential.

[0197] By adopting the above solution, the third sub-protection components are set on K branches. In the event of double-point insulation failure across the electrical box (support), the short-circuit current is affected, reducing the possibility of high-voltage ignition and battery combustion and explosion, while making the wiring more flexible; at the same time, the number of third sub-protection components configured can be reduced, saving costs.

[0198] In some embodiments, the protection component includes K third sub-protection components, and the K third sub-protection components are respectively connected in series to K branches.

[0199] It is understandable that a third sub-protection component is provided between each adjacent support member 12 , so when insulation failure occurs in any two support members 12 , there are two third sub-protection components to provide overcurrent protection against short-circuit current.

[0200] By adopting the above solution, a third sub-protection component is provided between each adjacent support member 12. In the event of insulation failure in any two support members 12, at least two third sub-protection components are provided to protect against short-circuit current, further reducing the possibility of high-voltage ignition and battery combustion and explosion.

[0201] In some embodiments, the resistance values ​​of the third sub-protection components are equal.

[0202] It can be understood that, since the resistance values ​​of the third sub-protection components are equal, the voltage drops across the third sub-protection components are equal.

[0203] By adopting the above solution, the pressure difference between each adjacent support member is equal. In the event of insulation failure in two support members, the stability of the current limiting effect is improved, and the possibility of high-voltage ignition and battery combustion and explosion is further reduced.

[0204] In some embodiments, the energy storage system further includes a plurality of third capacitive components.

[0205] A plurality of third capacitive components are connected in parallel with the at least one third sub-protection component in a one-to-one correspondence.

[0206] In the event of lightning strikes, surges, and the like, a spike current will appear on each third sub-protection component, and each third capacitive component suppresses the spike voltage on each third sub-protection component.

[0207] By adopting the above solution, in the event of lightning strikes, surges, etc., each third capacitive component suppresses the voltage spikes on each third sub-protection component, reducing the possibility of breakdown of the third sub-protection component and improving the reliability of the energy storage system. At the same time, the spike voltage between the total positive line and the total negative line is filtered out, thereby improving the stability of the energy storage system.

[0208] In some embodiments, one or more of the N supports are connected to an electrical platform.

[0209] As will be understood by those skilled in the art, the electrical platform can be assigned an electrical potential and / or can be provided with an electrical potential. As an example, the electrical platform can be an isoelectrical object, such that devices connected to the electrical platform have the same electrical potential. In some embodiments, the electrical platform includes a valve tower platform of an energy storage valve, which can be connected to a power ground.

[0210] Any node in the voltage-sharing chain can be connected to the power platform. The voltage of the total negative line and the voltage of the total positive line change with the change of the node connected to the power platform, thereby adapting to various application scenarios and enriching the functions of the product.

[0211] By adopting the above solution, the voltage balancing chain including the protection component can be used as a voltage dividing resistor at the same time, thereby eliminating the need to set up a voltage dividing resistor, simplifying the hardware design and saving costs.

[0212] In some embodiments, when N is an even number, the N / 2th support member is connected to the electrical platform;

[0213] When N is an odd number, the (N+1) / 2th support member is connected to the electric platform.

[0214] It can be understood that when N is an odd number, the voltage between the power platform and the total positive line is a first voltage, the voltage between the power platform and the total negative line is a second voltage, the first voltage and the second voltage are equal, and when the power platform is grounded, the absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line are minimum. When N is an even number, the voltage between the power platform and the total positive line is a first voltage, the voltage between the power platform and the total negative line is a second voltage, the first voltage and the second voltage are closest, and when the power platform is grounded, similarly, the maximum absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line are minimum.

[0215] By adopting the above solution, the middlemost support member is connected to the electrical platform. Therefore, when the electrical platform is grounded, the maximum value of the absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line are minimized, further improving the safety and reliability of the energy storage system.

[0216] In some embodiments, the energy storage system further includes a first supporting device, the first supporting device being configured to support the N supporting members, the first supporting device being connected to the electric platform.

[0217] The supporting equipment is used to support and / or accommodate the electrical box, batteries, etc., and the above-mentioned supporting equipment includes an electrical cabinet.

[0218] By adopting the above solution, since the first supporting device is connected to the electric platform, the convenience of wiring is improved, there is no need to configure different protection methods for various working conditions, and the first supporting device is in a non-suspended state, so the protection method is simple.

[0219] In some embodiments, one of a total positive line, a total negative line, and a conductive path is connected to the electrical platform.

[0220] As an example, when the electrical platform is grounded, the equipment connected to the electrical platform (such as the electrical box housing of the battery) is generally also considered to be grounded. In this example, the electrical platform is given a ground potential through grounding, and the equipment connected to the electrical platform is considered to be provided with a ground potential through the electrical platform; as another example, when the electrical platform is connected to the total positive line of the electrical cabinet, it can be considered that the electrical platform is given the potential of the total positive line. If there is a device (such as the electrical cabinet body of the battery) connected to the electrical platform, it can be considered that the device is provided with the potential of the total positive line by the electrical platform.

[0221] By adopting the above solution, the flexibility of wiring is improved, and different protection modes can be configured for various working conditions.

[0222] According to some embodiments of the present application, optionally, please continue to refer to FIG11 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is described in detail as follows:

[0223] In addition to all the components and assemblies of the energy storage system shown in FIG. 10 , the energy storage system further includes a third supporting device 830 .

[0224] The conductive path and the third supporting device 830 are connected to the electrical platform.

[0225] It can be understood that by connecting the conductive path and the third supporting device 830 to the electrical platform, all supporting members are at the same potential, and the protection method is simple.

[0226] By adopting the above solution, since the conductive path and the third supporting device 830 are connected to the electrical platform, the convenience of wiring is improved, and there is no need to configure different protection methods for various working conditions. In addition, the third supporting device 830 and each supporting member 12 are in a non-suspended state, and the protection method is simple.

[0227] According to some embodiments of the present application, optionally, please continue to refer to FIG12 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is described in detail as follows:

[0228] In addition to all the components and assemblies of the energy storage system shown in FIG10 , the energy storage system further includes two second voltage dividing assemblies 818 ;

[0229] Two second voltage dividing components 818 are connected in series between the total positive line and the total negative line;

[0230] The middle nodes of the two second voltage-dividing components 818 are connected to the electrical platform.

[0231] It can be understood that the resistance values ​​of the two second voltage-dividing components 818 are the same. By connecting the two second voltage-dividing components 818 to the electrical platform, the voltage between the electrical platform and the total positive line is the first voltage, and the voltage between the electrical platform and the total negative line is the second voltage. The first voltage and the second voltage are equal. When the electrical platform is grounded, the absolute value of the potential of the total positive line and the absolute value of the potential of the total negative line are minimized.

[0232] By adopting the above solution, by providing two second voltage-dividing components 818 and clamping the common point of the two second voltage-dividing components 818 at the potential of the electric platform, the safety of the energy storage system is improved, and the maximum value of the absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line is minimized, further improving the safety and reliability of the energy storage system.

[0233] According to some embodiments of the present application, optionally, please continue to refer to FIG13 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is detailed as follows:

[0234] In addition to all the components and assemblies of the energy storage system shown in FIG10 , the energy storage system has a filter circuit 40 connected in series on the total positive line and the total negative line; the filter circuit 40 is configured to filter the first DC power output by the battery module.

[0235] In a specific implementation, as shown in FIG14 , the filter circuit 40 includes a first inductor L1, a second inductor L2, and a first capacitor C1; the first inductor L1 is connected in series to the total positive line, and the second inductor L2 is connected in series to the total negative line; the first capacitor C1 is connected between the total positive line and the total negative line.

[0236] By connecting the filter circuit in series with the total positive line and the total negative line, the stability of the first direct current is improved.

[0237] According to some embodiments of the present application, optionally, please continue to refer to FIG15 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is detailed as follows:

[0238] In addition to all the components and assemblies of the energy storage system as shown in FIG10 , the above energy storage system has an isolating switch assembly 100 and a relay assembly 200 connected in series on the total positive line and the total negative line.

[0239] In a specific implementation, as shown in FIG16 , the isolating switch assembly 100 includes a first isolating switch KG1 and a second isolating switch KG2 ; the first isolating switch KG1 is connected in series to the total positive line, and the second isolating switch KG2 is connected in series to the total negative line.

[0240] The relay assembly 200 includes a pre-charge assembly connected in series on the total positive line and a first relay K1 connected in series on the total negative line; wherein, the pre-charge assembly includes a second relay K2, a third relay K3 and a first resistor R1; the third relay K3 and the first resistor R1 are connected in series and then connected in parallel with the second relay K2.

[0241] By sequentially connecting the isolating switch assembly and the relay assembly in series on the total positive line and the total negative line, the flexibility of the first direct current output is improved.

[0242] According to some embodiments of the present application, optionally, please continue to refer to FIG17 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is described in detail as follows:

[0243] In addition to all the components and assemblies of the energy storage system shown in FIG. 1 , the energy storage system further includes a conversion circuit 50 .

[0244] The conversion circuit 50 is connected to the total positive line and the total negative line, and is configured to convert the first direct current output by the battery module into alternating current.

[0245] As an example but not a limitation, as shown in FIG18 , the conversion circuit 50 includes a first IGBT tube M1, a second IGBT tube M2, a third IGBT tube M3, and a fourth IGBT tube M4; the drain of the first IGBT tube M1, the drain of the third IGBT tube M3, the source of the second IGBT tube M2, and the source of the fourth IGBT tube M4 collectively serve as a first DC input terminal of the conversion circuit 50, connected to the total positive line and the total negative line to receive the first DC power; the source of the first IGBT tube M1, the source of the third IGBT tube M3, the drain of the second IGBT tube M2, and the drain of the fourth IGBT tube M4 collectively serve as an AC output terminal of the conversion circuit 50 to output AC power.

[0246] By adopting the above solution, the first direct current is converted into alternating current to achieve alternating current output of the energy storage module.

[0247] According to some embodiments of the present application, optionally, the protection component 13 is a current limiting component, which is used to limit the current between the N supporting members; or

[0248] The protection component 13 is an overcurrent protection component, which is used to perform overcurrent protection on the current generated by the conductive path.

[0249] It should be noted that the current limiting component may include a resistor component. In a specific implementation, the resistance of the current limiting component 131 may be between the kΩ level and the MΩ level. The current limiting component reduces short-circuit current, thereby reducing the possibility of high-voltage ignition and battery combustion and explosion, while maintaining the normal operation of the energy storage system.

[0250] The overcurrent protection assembly may include a fuse, a fuse, an electronic circuit breaker, a current protection switch, and an overcurrent relay. The overcurrent protection assembly disconnects the two support members 12 due to insulation failure, reducing the possibility of high-voltage ignition and battery combustion and explosion, further improving safety and reliability.

[0251] By adopting the above solution, the protection component 13 can be a current limiting component or an overcurrent protection component, which improves the flexibility of the protection component configuration.

[0252] According to some embodiments of the present application, optionally, please continue to refer to FIG. 19 , which shows a schematic structural diagram of an energy storage system provided by another embodiment of the present application. For ease of illustration, only the portion related to this embodiment is shown, which is described in detail as follows:

[0253] In addition to all the components and assemblies of the energy storage system shown in FIG. 11 , the energy storage system further includes a filter circuit 40 , a conversion circuit 50 and two second voltage divider components 818 .

[0254] Two second voltage dividing components 818 are connected in series between the total positive line and the total negative line;

[0255] The two second voltage-dividing components 818 are connected to the electrical platform.

[0256] The filter circuit 40 is connected to the total positive line and the total negative line, and is configured to filter the first direct current output by the battery module.

[0257] The conversion circuit 50 is connected to the filter circuit 40 and is configured to convert the filtered first direct current into alternating current.

[0258] In a specific implementation, as shown in FIG20 , the filter circuit 40 includes a first inductor L1, a second inductor L2, and a first capacitor C1; the first inductor L1 is connected in series to the total positive line, and the second inductor L2 is connected in series to the total negative line; the first capacitor C1 is connected between the total positive line and the total negative line.

[0259] The conversion circuit 50 includes a first IGBT tube M1, a second IGBT tube M2, a third IGBT tube M3, and a fourth IGBT tube M4. The drain of the first IGBT tube M1, the drain of the third IGBT tube M3, the source of the second IGBT tube M2, and the source of the fourth IGBT tube M4 collectively serve as a first DC input terminal of the conversion circuit 50, connected to the total positive line and the total negative line to receive the first DC power. The source of the first IGBT tube M1, the source of the third IGBT tube M3, the drain of the second IGBT tube M2, and the drain of the fourth IGBT tube M4 collectively serve as an AC output terminal of the conversion circuit 50 to output AC power.

[0260] The second voltage dividing component 818 includes a voltage dividing resistor Rsh.

[0261] By connecting the filter circuit and the conversion circuit in series on the total positive line and the total negative line, the stability of the first direct current and the flexibility of the output are improved, the common contact of the two second voltage-dividing components 818 is clamped at the potential of the electric platform, the safety of the energy storage system is improved, and the maximum value of the absolute value of the voltage of the total positive line and the absolute value of the voltage of the total negative line are minimized, further improving the safety and reliability of the energy storage system; the first direct current is converted from direct to alternating current to realize the alternating current output of the energy storage module.

[0262] According to some embodiments of the present application, the present application also provides a power supply device, including the energy storage system of any of the above solutions.

[0263] In a specific implementation, the power supply device may include an energy storage station, and the energy storage system stores electrical energy for the energy storage station and releases the electrical energy when the power grid is short of energy.

[0264] Since the power supply device includes the energy storage system of any of the above solutions, it can affect the short-circuit current and reduce the possibility of causing high-voltage ignition and battery combustion and explosion.

[0265] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises a total positive circuit, a total negative circuit, and a battery module connected between the total positive circuit and the total negative circuit, wherein the energy storage system is configured to output electric energy from the battery module through the total positive circuit and the total negative circuit, and / or the energy storage system is configured to input electric energy to the battery module through the total positive circuit and the total negative circuit; The battery module includes M battery assemblies connected in series; The energy storage system further includes N supporting members, the M battery modules are supported by the N supporting members, and the M battery assemblies are insulated from the N supporting members; The energy storage system further includes a conductive path, wherein K support members among the N support members are connected to the conductive path through K branches respectively, wherein M, N, and K are all positive integers, and M≥N≥K>1; The conductive path and / or the branch path are provided with a protection component.

2. The energy storage system according to claim 1, characterized in that: The K branches are connected to the conductive path to form K nodes; The protection component includes at least one first sub-protection component, the number of the at least one first sub-protection component is ≤K-1, and one or zero of the at least one first sub-protection component is connected in series between any two adjacent nodes among the K nodes.

3. The energy storage system according to claim 2, characterized in that: The number of the at least one first sub-protection component is K-1, and one of the at least one first sub-protection component is connected in series between any two adjacent nodes among the K nodes.

4. The energy storage system according to claim 2, characterized in that: The conductive path includes K-1 sub-paths formed by the K nodes, a target sub-path is provided for every m sub-paths, the target sub-path is connected in series with the first sub-protection component, and m is a natural number.

5. The energy storage system according to claim 4, characterized in that: m is 0, the number of the at least one first sub-protection component is K-1, and the K-1 first sub-protection components are respectively connected in series to the K-1 sub-passes.

6. The energy storage system according to any one of claims 2 to 5, characterized in that: The resistance values ​​of the first sub-protection components are equal.

7. The energy storage system according to any one of claims 2 to 6, characterized in that: The energy storage system further comprises: A plurality of first capacitive components are connected in parallel with the plurality of first sub-protection components in a one-to-one correspondence.

8. The energy storage system according to claim 7, characterized in that: The capacitance of each of the first capacitive components is equal.

9. The energy storage system according to any one of claims 1 to 8, characterized in that: The positive pole of the first battery assembly is connected to the total positive circuit, and the first branch among the K branches is connected to the first node formed by the conductive path and connected to the total positive circuit; the negative pole of the Mth battery assembly is connected to the total negative circuit, and the Kth branch among the K branches is connected to the Kth node formed by the conductive path and connected to the total negative circuit.

10. The energy storage system according to claim 9, characterized in that: The energy storage system also includes two second sub-protection components; one second sub-protection component is connected in series between the first node and the total positive line and between the Kth node and the total negative line respectively.

11. The energy storage system according to claim 10, characterized in that: The total positive line and the total negative line are connected in series in sequence to an isolating switch module, a relay module and a filter module; the filter module is configured to filter the first direct current output by the battery module; The second sub-protection component is connected together with the isolation switch module; or The second sub-protection component is connected to the isolation switch module and the relay module; or The second sub-protection component is connected to the filter module.

12. The energy storage system according to claim 10 or 11, characterized in that: When the resistance value of each of the first sub-protection components is the first resistance value R, the resistance value of each of the second sub-protection components is half or twice the first resistance value R.

13. The energy storage system according to any one of claims 10 to 12, characterized in that: The energy storage system further comprises: A plurality of second capacitive components are connected in parallel with the plurality of second sub-protection components in a one-to-one correspondence.

14. The energy storage system according to claim 13, characterized in that: When the capacitance of each of the first capacitive components connected in parallel with each of the first sub-protection components is the first capacitance C, the capacitance of each of the second capacitive components is half of the first capacitance C.

15. The energy storage system according to any one of claims 1 to 14, characterized in that: The protection component includes at least one third sub-protection component, the number of the third sub-protection components is ≤K, and at least one of the third sub-protection components is respectively connected in series to at least one branch among the K branches.

16. The energy storage system according to claim 15, characterized in that: The protection component comprises K third sub-protection components, and the K third sub-protection components are respectively connected in series on the K branches.

17. The energy storage system according to claim 15 or 16, characterized in that: The resistance values ​​of the third sub-protection components are equal.

18. The energy storage system according to any one of claims 15 to 17, characterized in that: The energy storage system further comprises: A plurality of third capacitive components are connected in parallel with the at least one third sub-protection component in a one-to-one correspondence.

19. The energy storage system according to any one of claims 1 to 18, characterized in that: One or more of the N supports are connected to the electrical platform.

20. The energy storage system according to claim 19, characterized in that: When N is an even number, the N / 2th support member is connected to the electrical platform; When N is an odd number, the (N+1) / 2th support member is connected to the electric platform.

21. The energy storage system according to any one of claims 19 or 20, characterized in that: The energy storage system further includes a first supporting device, the first supporting device being used to support the N supporting members, the first supporting device being connected to the electric platform.

22. The energy storage system according to any one of claims 19 to 21, characterized in that: The total positive line, the total negative line, and one of the conductive paths are connected to the electrical platform.

23. The energy storage system according to any one of claims 19 to 21, characterized in that: The energy storage system also includes two second voltage dividing components; Two of the second voltage-dividing components are connected in series between the total positive circuit and the total negative circuit; The middle nodes of the two second voltage-dividing components are connected to the electric platform.

24. The energy storage system according to any one of claims 1 to 23, characterized in that: Also includes: The conversion circuit is connected to the total positive line and the total negative line, and is configured to convert the first direct current output by the battery module to output alternating current.

25. The energy storage system according to any one of claims 1 to 24, characterized in that: The protection component is a current limiting component, and the current limiting component is used to limit the current generated in the conductive path; or The protection component is an overcurrent protection component, and the overcurrent protection component is used to perform overcurrent protection on the conductive path.

26. A power supply device, characterized in that: The power supply device comprises an energy storage system as described in any one of claims 1 to 25.

Images