CN215680858U - Energy storage system - Google Patents

Abstract

The utility model discloses an energy storage system, comprising: the module comprises a plurality of module units, wherein each module unit comprises a control module and a plurality of electricity storage modules, each control module comprises an energy storage converter, and the electricity storage modules are connected in series and are electrically connected with the energy storage converters. According to the energy storage system provided by the embodiment of the utility model, the plurality of electricity storage modules are connected in series, so that the electricity can be directly converged to the energy storage converter, a convergence cabinet in the traditional sense is not needed, the cost of the convergence cabinet is saved, and the plurality of electricity storage modules and the energy storage converter are connected in series, so that the electric connection structure is simple, the wiring is simple, the connection cost is low, the problems of high material cost and high installation and operation cost caused by heavy cables and high fixing difficulty are avoided, and meanwhile, the potential safety hazard is reduced.

Description

Energy storage system

Technical Field

The utility model relates to the technical field of energy storage, in particular to an energy storage system.

Background

In the related technology, an energy storage system is an essential basic measure for the development of a micro-grid, an island grid, a distributed power generation system and a new energy automobile rapid charging technology. The energy storage system is applied to the power system, so that the demand side management, the peak clipping and valley filling, the load smoothing and the power grid frequency quick adjustment are realized, the operation stability and reliability of the power grid are improved, and the impact of a new energy power generation system with large instantaneous changes such as photovoltaic and wind power on the power grid is reduced. However, in the prior art, the energy storage system generally is a container type integral structure, and has high requirements on a set site, so that different power and capacity requirements of users cannot be conveniently met, a plurality of battery racks for placing the battery modules are arranged in the container, and a confluence device is required to be arranged to connect all the battery racks in parallel and uniformly output the batteries to the energy storage converter, so that the energy storage system has less available space, and the material cost and the installation operation cost are high, and the market popularization is not facilitated.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an energy storage system, which does not need a junction box in the conventional sense, saves cost, and has simple wiring.

An energy storage system according to an embodiment of the present invention includes: the module comprises a plurality of module units, wherein each module unit comprises a control module and a plurality of electricity storage modules, each control module comprises an energy storage converter, and the electricity storage modules are connected in series and are electrically connected with the energy storage converters.

According to the energy storage system provided by the embodiment of the utility model, the plurality of electricity storage modules are connected in series, so that the electricity can be directly converged to the energy storage converter, a convergence cabinet in the traditional sense is not needed, the cost of the convergence cabinet is saved, and the plurality of electricity storage modules and the energy storage converter are connected in series, so that the electric connection structure is simple, the wiring is simple, the connection cost is low, the problems of high material cost and high installation and operation cost caused by heavy cables and high fixing difficulty are avoided, and meanwhile, the potential safety hazard is reduced.

In addition, the energy storage system according to the above embodiment of the present invention may further have the following additional technical features:

according to some embodiments of the utility model, the top of the module unit is provided with a total electrical connection structure, and the total electrical connection structures of a plurality of the module units are electrically connected through a total copper bar.

According to some embodiments of the present invention, the plurality of module units are arranged along a first direction, the total electrical connection structure includes total positive connection structures and total negative connection structures that are distributed at intervals along the first direction, the total positive connection structures and the total negative connection structures of two adjacent module units are electrically connected, and the total positive connection structures and the total negative connection structures of two module units located at two ends of the first direction are electrically connected.

According to some embodiments of the utility model, the control module comprises a control independent housing, the total electrical connection structure is arranged through a top wall of the control independent housing, and the energy storage converter is arranged in the control independent housing and electrically connected with the total electrical connection structure through an alternator copper bar.

According to some embodiments of the utility model, the power storage module comprises: an electricity storage independent housing; a plurality of group batteries, the group battery is located in the independent shell of accumulate, the group battery is equipped with the electricity connection portion, and is a plurality of the group battery the electricity connection portion pass through the parallelly connected and with total electric connection structure electricity is connected.

According to some embodiments of the utility model, the electrical connection comprises: a mounting part mounted to the battery pack and having a mounting passage; the plug connector is positioned in the mounting channel and comprises two limiting plates arranged at intervals and a connecting plate for connecting the two limiting plates, and the electrode copper bar is inserted between the two limiting plates; the connecting copper bar is connected with the connecting plate and electrically connected with the battery pack.

According to some embodiments of the utility model, both of the limiting plates comprise: one end of each limiting section is connected with the connecting copper bar, and the two limiting sections are provided with inner convex parts which extend close to each other; the outer expanding section is arranged at the other end of the limiting section, and the distance between the two outer expanding sections is gradually increased towards the direction far away from the connecting copper bar.

According to some embodiments of the utility model, a thickness of the electrode copper bar is smaller than a pitch between the two inner protrusions.

According to some embodiments of the utility model, the connecting plate is provided with a connecting port, and the connecting copper bar penetrates through the connecting port and is connected with the plug connector in a welding manner.

According to some embodiments of the utility model, the mounting portion comprises: the mounting plate is mounted on the battery pack and provided with a mounting opening; the two fixing plates are connected with the mounting plate and are respectively arranged on two sides of the mounting opening, and the plug connector penetrates through the mounting opening and stretches into the space between the two fixing plates.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of an energy storage system according to an embodiment of the utility model;

FIG. 2 is an enlarged schematic view of FIG. 1 at circle A;

fig. 3 is a schematic structural view of an electric storage module according to an embodiment of the present invention;

fig. 4 is a front view of an electric storage module according to an embodiment of the utility model;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a partial cross-sectional view taken along line C-C of FIG. 5;

fig. 7 is a schematic structural view of a battery pack according to an embodiment of the present invention;

fig. 8 is a schematic structural view of an electrical connection portion according to an embodiment of the present invention;

fig. 9 is a schematic structural view of an electrical connection portion according to an embodiment of the present invention;

fig. 10 is a schematic structural view of an electrical connection portion according to an embodiment of the present invention;

FIG. 11 is a partial cross-sectional view taken along line D-D of FIG. 10;

fig. 12 is a schematic structural view of an electrical connection portion according to an embodiment of the present invention;

FIG. 13 is a partial cross-sectional view taken along line E-E of FIG. 12;

fig. 14 is a schematic structural view of a connecting portion according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a connection portion according to an embodiment of the present invention.

Reference numerals:

an energy storage system 100;

a module unit 10; an electricity storage module 11; an electricity storage independent housing 111; a battery pack 112; a control module 12; a control independent housing 121; an energy storage converter 122;

the overall electrical connection structure 20; a total positive connection structure 21; a total negative connection 22;

an electrical connection portion 30; a positive electrical connection 31; a negative electrical connection 32;

a mounting portion 42; a mounting channel 421; a mounting plate 422; a fixing plate 423; the connecting segments 424; a mounting opening 425; a connecting portion 43; a plug-in connector 44; a limit plate 45; an flaring segment 451; an inner protrusion 452; a stopper section 453; interference avoidance hole 454; a connecting plate 46; a connection port 461; connecting copper bars 47;

a top cover 50;

a total copper bar 61; an electrode copper bar 63; a positive copper bar 631; and a negative copper bar 632.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and "a plurality" means two or more, and the first feature may be "on" or "under" the second feature, and may include the first and second features being in direct contact, or may include the first and second features being not in direct contact but being in contact with another feature therebetween, and the first feature being "on", "above" and "above" the second feature may include the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is higher in level than the second feature.

In the related art, the energy storage system comprises a container, and a battery rack, a confluence device and an energy storage converter which are arranged in the container, wherein the battery modules on the battery rack are connected in series by using a circular power cable, then a plurality of battery racks are connected in parallel by using the confluence device, and then the battery modules are uniformly output to the energy storage converter by the confluence device. The equipment occupation space that converges is big, and the space that leads to being used for setting up the battery rack in the container is little, and space utilization is low, and the nominal size of the cable between equipment that converges and the energy storage converter can be great, and the cable can be allowed bend radius very big, and the cable is heavy, and the fixed degree of difficulty is high. The material cost and the installation and operation cost of the energy storage system are high, and the energy storage system is not favorable for energy storage marketization popularization. Meanwhile, a plurality of battery modules on the battery rack are connected in series and wired in a complicated mode, the connection cost is high, the connection is disordered, the attractiveness is low, and potential safety hazards exist due to the fact that cables are complicated.

Based on this, the present application provides an energy storage system 100, which omits a bus device and saves the cost for setting the bus device.

An energy storage system 100 according to an embodiment of the utility model is described below with reference to the drawings.

Referring to fig. 1 and 2, an energy storage system 100 according to an embodiment of the present invention may include a plurality of module units 10, the plurality of module units 10 including a control module 12 and a plurality of energy storage modules 11, wherein the control module 12 includes an energy storage converter 122, and the plurality of energy storage modules 11 are connected in series and electrically connected to the energy storage converter 122.

According to the energy storage system 100 provided by the embodiment of the utility model, the plurality of electricity storage modules 11 are connected in series, and can be directly converged to the energy storage converter 122, a convergence cabinet in the traditional sense is not needed, so that the cost of the convergence cabinet is saved, and the plurality of electricity storage modules 11 and the energy storage converter 122 are connected in series, so that the electric connection structure is simple, the wiring is simple, the connection cost is low, the problems of high material cost and high installation and operation cost caused by heavy cables and high fixing difficulty are avoided, and the potential safety hazard is reduced.

According to some embodiments of the present invention, each modular unit 10 comprises a separate, sealed, independent housing, with the functional components of each modular unit 10 being disposed within the corresponding independent housing. For example, for the power storage module 11, the functional component may be the battery pack 112, and for the control module 12, the functional component may be the energy storage converter 122.

By providing the independent housing, the plurality of module units 10 can be arranged in a predetermined direction to form independent units connected together. Because energy storage system 100 includes a plurality of independent modular unit 10, through the quantity and the mode of arranging of adjusting a plurality of modular unit 10, make energy storage system 100 that constitutes have different electric capacity and shape (for example, "one" style of calligraphy, "ten" style of calligraphy, "T" type, "L" type, multilateral annular etc.) to the power that corresponds the user difference, the capacity demand, and energy storage system 100's setting is nimble changeable more, can with the installation place looks adaptation, not only be convenient for reduce the requirement to the installation place, be convenient for energy storage system 100's installation setting.

In the related art, the energy storage device is a container type energy storage device, and the appearance size of the container is fixed, so that the installation requirements of some special installation sites, such as a long and narrow area, cannot be met. Moreover, the number of the battery modules which can be accommodated in the container is fixed, so that the container is easily not fully loaded due to the requirements for different capacities, and the cost is increased. In addition, all battery modules are installed in the same container, even if the battery modules are simply separated through the partition plate, the sealed isolation cannot be realized, when one of the batteries or the battery modules is out of control due to heat, the condition that the battery modules are out of control due to heat in the whole container easily occurs, and the fire is caused to be large and the loss is serious.

In the embodiment of the present invention, the plurality of independent module units 10 of the energy storage system 100 are connected together, so that a container structure in the related art is omitted, the structure of the energy storage system 100 is simpler, and the flexible design of the overall structure and the reliability of the electrical connection between the plurality of module units 10 are more easily realized. And the functional components of the plurality of module units 10 are respectively arranged in the independent shells, so that the functional components are isolated, the chain reaction caused by the spread of thermal runaway is reduced, and the fire degree and the loss are reduced. Moreover, the fixing mode of the plurality of module units 10 is simple, the module units are easy to be assembled randomly according to an installation site, the arrangement is more flexible and changeable, the structure of the container is omitted, and the condition that the space in the container is wasted is avoided. In addition, the individual housings of the plurality of module units 10 may have a common structure, in other words, the individual housing structures of the control module 12 and the power storage module 11 may be the same or have a small change, and the overall structure of the plurality of power storage modules 11 may be the same or have a small change, thereby reducing design and development costs.

It should be noted that the setting direction can be an arrangement direction flexibly designed according to the requirement of the installation site. For example, in an embodiment in which a plurality of the module units 10 are arranged in a line shape, as shown in fig. 1, the set direction may be a left-right direction of the module units 10.

According to some embodiments of the present invention, as shown in fig. 1 to 4, the top of the module unit 10 is provided with the total electrical connection structure 20, and the total electrical connection structures 20 of a plurality of module units 10 can be electrically connected through the total copper bars 61. For example, in some embodiments, the total electrical connection structure 20 and the total copper bars 61 may be connected by fasteners. Compare with the cable among the correlation technique, total copper bar 61's engineering size is less, and light in weight easily bends and fixes, has lightened the weight of electric connection circuit greatly, and material cost and installation operating cost are low, do benefit to the market-oriented popularization, and make electric connection circuit simpler clear, prevent the installation hidden danger.

In some embodiments, as shown in fig. 1 and 2, the plurality of module units 10 are arranged along a first direction (e.g., a left-right direction shown in fig. 1), the total electrical connection structure 20 includes a total positive connection structure 21 and a total negative connection structure 22, and the total positive connection structure 21 and the total negative connection structure 22 are spaced apart along the first direction, so that the total positive connection structure 21 of one module unit 10 and the total negative connection structure 22 of another module unit 10 are adjacent in two adjacent module units 10, in other words, the total electrical connection structures 20 of the plurality of module units 10 are arranged in such a way that the total positive connection structure 21, the total negative connection structure 22, the total positive connection structure 21, and the total negative connection structure 22 … … are spaced apart.

The total positive connecting structure 21 and the total negative connecting structure 22 of two adjacent module units 10 are electrically connected, for example, by a total copper bar 61; the total positive connection structure 21 and the total negative connection structure 22 of the two module units 10 located at both ends in the first direction are electrically connected, for example, by the total copper bar 61. From this, a plurality of modular unit 10 realize establishing ties through a plurality of total copper bars 61, and a plurality of total copper bars 61 walk the line simply, and difficult emergence is interfered or the short circuit.

According to some embodiments of the present invention, as shown in fig. 1, the energy storage system 100 further includes a top cover 50, the top cover 50 is covered on top of the plurality of module units 10, and the overall electrical connection structure 20 is located in the top cover 50. So that the top cover 50 shields the structures exposed outside the independent shell, such as the total electric connection structures 20 of the plurality of module units 10, the total copper bars 61 for realizing the series connection of the total electric connection structures 20, and the like, thereby avoiding the risk of electric shock and short circuit, and also making the appearance of the energy storage system 100 more beautiful.

In addition, the top cover 50 may also connect a plurality of module units 10 together to form a more stable whole, and in some embodiments, the energy storage system 100 may include a base on which the plurality of module units 10 are supported and mounted to achieve mechanical connection and fixation of the plurality of module units 10, thereby improving the integrity and stability of the energy storage system 100.

In some embodiments of the present invention, as shown in fig. 1, the independent housing of the control module 12 may be a control independent housing 121, the energy storage converter 122 is disposed in the control independent housing 121, and the overall electrical connection structure 20 is disposed through a top wall of the control independent housing 121. A part of the overall electrical connection structure 20 is located in the control independent housing 121 so as to be electrically connected with the energy storage converter 122, for example, the energy storage converter 122 is electrically connected through an alternator copper bar; another part of the total electrical connection structure 20 is located outside the control independent housing 121 so as to be electrically connected with the electric storage module 11, for example, the electric storage module 11 through the total copper busbar 61. The overall electrical connection structure 20 can be in sealing engagement with the control independent housing 121 to ensure hermeticity inside the control independent housing 121.

In some embodiments of the present invention, as shown in fig. 1 to 5, the independent housing of the power storage module 11 may be a power storage independent housing 111, and the power storage module 11 further includes a plurality of battery packs 112, and the plurality of battery packs 112 are disposed in the power storage independent housing 111 to be sealed by the power storage independent housing 111, so as to prevent the thermal runaway of the entire energy storage system 100 caused by the thermal runaway of one of the battery packs 112.

In addition, a plurality of battery packs 112 are connected in parallel and electrically connected to the overall electrical connection structure 20. Compared with the wiring mode of serially connecting the battery packs 112, the wiring mode of the utility model has the advantages that the plurality of battery packs 112 are connected in parallel, so that the electric connection wiring is simple and beautiful, short circuit is not easy to occur, the voltage of the electricity storage module 11 is low, and the safety and the reliability are higher.

In some embodiments, as shown in fig. 3-7, each battery pack 112 is provided with an electrical connection 30, and the electrical connections 30 of a plurality of battery packs 112 may be connected in parallel by the electrode copper bar 63. Compare with the cable among the correlation technique, the engineering size of electrode copper bar 63 is less, and light in weight easily bends and fixes, has lightened the weight of electric connection circuit greatly, and material cost and installation operating cost are low, do benefit to the market-oriented popularization, and make electric connection circuit simpler clear, prevent the installation hidden danger.

In some embodiments, as shown in fig. 6, the electrical connection portion 30 may be plugged and mated with the electrode copper bar 63 to realize a quick plug connection structure, which is simpler and more attractive, and is beneficial to the modular design of the energy storage system 100.

In some embodiments, as shown in fig. 3-7, the total electrical connection structure 20 of each module unit 10 includes a total positive connection structure 21 and a total negative connection structure 22, the electrical connection portion 30 of each battery pack 112 includes a positive electrical connection portion 31 and a negative electrical connection portion 31, and the electrode copper bar 63 includes a positive electrode copper bar 631 and a negative electrode copper bar 632. The positive electric connection parts 31 and the total positive connection structure 21 of the plurality of battery packs 112 are electrically connected with the positive copper bar 631, and the negative electric connection parts 31 and the total negative connection structure 22 of the plurality of battery packs 112 are electrically connected with the negative copper bar 632. In other words, the positive electricity connection parts 31 of the plurality of battery packs 112 are connected in parallel through the same positive electrode copper bar 631, and the negative electricity connection parts 31 of the plurality of battery packs 112 are connected in parallel through the same negative electrode copper bar 632, so that the number of the electrode copper bars 63 is reduced, and the stability of the electric connection and the convenience of the installation operation are improved.

Specifically, as shown in fig. 4, the plurality of battery packs 112 are arranged in the longitudinal direction, the positive electrical connection portion 31 and the negative electrical connection portion 31 of each battery pack 112 are arranged in the transverse direction (the left-right direction shown in fig. 4), so that the positive electrical connection portions 31 of the plurality of battery packs 112 are arranged in a row in the longitudinal direction, the negative electrical connection portions 31 of the plurality of battery packs 112 are arranged in a row in the longitudinal direction, the positive copper bar 631 extends in the longitudinal direction and is plugged into the plurality of positive electrical connection portions 31, and the negative copper bar 632 extends in the longitudinal direction and is plugged into the plurality of negative electrical connection portions 31.

In some embodiments, the angle between the electrode copper bar 63 and the electrical connection portion 30 may be 90 ° (as shown in fig. 5) or 180 °, which may be adjusted according to the actual installation form.

The specific structure of the electrical connection portion 30 according to some embodiments of the present invention is described below with reference to the accompanying drawings. In some embodiments of the present invention, the positive electrical connection portion 31 and the negative electrical connection portion 32 may have the same structure, so as to achieve the platform production of the electrical connection portion 30 and reduce the production cost.

According to some embodiments of the present invention, as shown in fig. 6-13, the electrical connection portion 30 includes a mounting portion 42 and a connection portion 43. The mounting portion 42 may be made of a fireproof insulating material (e.g., including a fireproof material layer and an insulating layer, such as injection molding) and is mounted on the battery pack 112 to fix and insulate the electrical connection portion 30 and the battery pack 112. The mounting portion 42 has a mounting passage 421, the connection portion 43 is located in the mounting passage 421 and electrically connected to the battery pack 112, and the connection portion 43 is used for electrically connecting to the electrode copper bar 63, thereby achieving the electrical connection of the electrode copper bar 63 and the battery pack 112. And the electric connection department of connecting portion 43 and electrode copper bar 63 is located the installation passageway 421 of installation department 42, avoids electric connection structure to expose, and is safer, connects more stably, is difficult for the pine to take off.

In some embodiments, as shown in fig. 6-15, the connection portion 43 includes: a plug 44 and a connecting copper bar 47. Wherein, the connector 44 includes two limiting plates 45 that the interval set up and the connecting plate 46 of connecting two limiting plates 45 to make the space between two limiting plates 45 form the slot, the tip of keeping away from connecting plate 46 of two limiting plates 45 can form and make electrode copper bar 63 male socket, so that electrode copper bar 63 can insert between two limiting plates 45, insert the slot promptly, in order to be connected with connector 44 electricity, realize spacingly simultaneously. The connecting copper bar 47 is connected with the connecting plate 46 and electrically connected with the battery pack 112, so that the electrical connection between the battery pack 112 and the electrode copper bar 63 is realized.

In some embodiments, as shown in fig. 11-15, both of the restraint panels 45 include a restraint section 453 and a flared section 451. One end (e.g., the rear end) of the stopper 453 is connected to the connecting copper bar 47, and the outward expanding section 451 is provided at the other end (e.g., the front end) of the stopper 453. The interval of two external expanding sections 451 increases progressively towards the direction of keeping away from connecting copper bar 47, and the socket is injectd to the one end of keeping away from connecting copper bar 47 of two external expanding sections 451, and electrode copper bar 63 can pass the clearance between two external expanding sections 451 and insert between two spacing sections 453. Through setting up outer section 451, make two limiting plates 45 form the flaring structure, the opening size of socket department is great, and it is easier that electrode copper bar 63 inserts between two limiting plates 45.

Further, the two stopper sections 453 are provided with inner projections 452 extending close to each other. Specifically, as shown in fig. 11-15, the distance between the ends of the two flared sections 451 far away from the connecting copper bar 47 is L1, the distance between the two limiting sections 453 is L2, the distance between the two inner protrusions 452 is L3, and L1 > L2 > L3. On one hand, the two limiting sections 453 can be matched with the channel wall of the mounting channel 421 of the mounting portion 42 for limiting, and on the other hand, the distance between the two inner convex portions 452 is small, so that the two inner convex portions can be in close contact with the electrode copper bar 63, and the electrical connection effect and the mechanical connection effect are improved.

In some embodiments of the present invention, as shown in fig. 6 and 11, the thickness of the electrode copper bar 63 is smaller than the interval between the two inner protrusions 452. Specifically, the thickness of the electrode copper bar 63 is L4, and L4 < L3. So that the electrode copper bar 63 is ensured to be closely contacted with the inner convex part 452 after being inserted between the two limiting plates 45, and the electric connection effect is improved.

In some embodiments, as shown in fig. 11 to fig. 15, the inner protrusion 452 may be provided with an interference avoiding hole 454 to separate the inner protrusion 452 into a plurality of electrical connection contact fingers, which is beneficial to realize the elastic connection between the electrical connection contact fingers and the electrode copper bar 63, and to avoid that the electrode copper bar 63 cannot be inserted between two inner protrusions 452 due to a processing error.

In some embodiments, as shown in fig. 11-15, the connecting plate 46 is provided with a connecting port 461, and the connecting copper bar 47 is inserted through the connecting port 461 and is connected to the plug 44 by welding (such as laser welding, brazing, TMPE welding, etc.), so that the connecting copper bar 47 and the plug 44 are completely fixed and firmly connected. The connecting copper bar 47 can be clamped between the two limiting plates 45 to realize the limiting between the two limiting plates 45 and improve the electrical connection effect with the plug 44.

According to some embodiments of the present invention, as shown in fig. 6-13, the mounting portion 42 includes: a mounting plate 422 and two fixing plates 423. The mounting plate 422 is mounted to the battery pack 112 and provided with a mounting opening 425, and the two fixing plates 423 are coupled to the mounting plate 422 and are respectively disposed at both sides (e.g., left and right sides) of the mounting opening 425 such that a gap between the two fixing plates 423 and the mounting opening 425 constitute a mounting passage 421. The connecting portion 43 is inserted through the mounting opening 425 and extends between the two fixing plates 423.

For example, the plug 44 may extend between the two fixing plates 423, so that the fixing plates 423 support and limit the plug 44, and the electrical connection and the mechanical connection between the plug 44 and the electrode copper bar 63 are more stable. The connecting copper bar 47 can be arranged in the mounting hole 425 in a penetrating way to connect the plug connector 44 and the battery pack 112, and meanwhile, the mounting part 42 can protect the connecting structure of the connecting copper bar 47 and the plug connector 44, so that the connecting copper bar 47 and the plug connector 44 are prevented from loosening.

In some embodiments, as shown in fig. 8-13, the two lateral ends (e.g., the upper end and the lower end) of the two fixing plates 423 may also be connected and fixed by the connecting segments 424, so as to further improve the protection and limiting effect on the plug 44, and ensure that the fixing plates 423 apply continuous elastic force to the plug 44.

In some embodiments, the plug connector 44 may be a sheet metal stamping.

Other configurations and operations of energy storage system 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the terms "embodiment," "particular embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An energy storage system, comprising:

a plurality of modular units including a control module and a plurality of power storage modules, wherein,

the control module comprises an energy storage converter, and the plurality of energy storage modules are connected in series and electrically connected with the energy storage converter.

2. The energy storage system of claim 1, wherein the top of the module units is provided with a general electrical connection structure, and the general electrical connection structures of a plurality of the module units are electrically connected through a general copper bar.

3. The energy storage system of claim 2, wherein the plurality of module units are arranged along a first direction, the total electrical connection structure comprises total positive connection structures and total negative connection structures that are spaced apart along the first direction, the total positive connection structures and the total negative connection structures of two adjacent module units are electrically connected, and the total positive connection structures and the total negative connection structures of two module units at two ends of the first direction are electrically connected.

4. The energy storage system of claim 2, wherein the control module comprises a control independent housing, the main electrical connection structure is disposed through a top wall of the control independent housing, and the energy storage converter is disposed in the control independent housing and electrically connected to the main electrical connection structure through an alternator copper bar.

5. The energy storage system of any of claims 2-4, wherein the electrical storage module comprises:

an electricity storage independent housing;

a plurality of group batteries, the group battery is located in the independent shell of accumulate, the group battery is equipped with the electricity connection portion, and is a plurality of the group battery the electricity connection portion pass through the parallelly connected and with total electric connection structure electricity is connected.

6. The energy storage system of claim 5, wherein the electrical connections comprise:

a mounting part mounted to the battery pack and having a mounting passage;

the plug connector is positioned in the mounting channel and comprises two limiting plates arranged at intervals and a connecting plate for connecting the two limiting plates, and the electrode copper bar is inserted between the two limiting plates;

the connecting copper bar is connected with the connecting plate and electrically connected with the battery pack.

7. The energy storage system of claim 6, wherein both of the limiting plates comprise:

one end of each limiting section is connected with the connecting copper bar, and the two limiting sections are provided with inner convex parts which extend close to each other;

the outer expanding section is arranged at the other end of the limiting section, and the distance between the two outer expanding sections is gradually increased towards the direction far away from the connecting copper bar.

8. The energy storage system of claim 7, wherein the thickness of the copper bar of electrodes is less than the spacing of the two inward protrusions.

9. The energy storage system of claim 6, wherein the connecting plate is provided with a connecting port, and the connecting copper bar is arranged through the connecting port and is connected with the plug connector in a welding manner.

10. The energy storage system of claim 6, wherein the mounting portion comprises:

the mounting plate is mounted on the battery pack and provided with a mounting opening;

the two fixing plates are connected with the mounting plate and are respectively arranged on two sides of the mounting opening, and the plug connector penetrates through the mounting opening and stretches into the space between the two fixing plates.

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