CN218919214U - Energy storage unit cabinet and energy storage system - Google Patents

Abstract

The utility model discloses an energy storage unit cabinet and an energy storage system with the energy storage unit cabinet. The energy storage unit cabinet includes: a cabinet body, the cabinet body has an installation cavity; a plurality of battery clusters, the battery cluster Installed in the installation cavity; the positive busbar, the positive busbar is connected to multiple battery clusters in parallel, and the end of the positive busbar extends out of the cabinet to form a positive connector; the negative busbar, the The negative busbars are connected in parallel with a plurality of battery clusters, and the ends of the negative busbars protrude from the cabinet to form a negative terminal. According to the energy storage unit cabinet of the embodiment of the utility model, a plurality of battery clusters are connected in parallel through the positive busbar and the negative busbar, and the positive terminal and the negative terminal can realize the connection between the energy storage unit cabinets, and the operation is convenient. The energy storage unit cabinet has strong scalability, and the number of connected energy storage unit cabinets can be flexibly adjusted to meet the actual capacity demand.

Description

Energy storage unit cabinet and energy storage system

technical field

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

Background technique

As the key to energy storage technology, the battery system deserves special attention for its convenience and scalability. At present, many domestic companies have conducted research on energy storage battery systems, and the existing container layouts are more or less unsatisfactory. For example, the battery cluster uses cables for wiring, resulting in more cables in the battery cluster, which is not conducive to system heat dissipation. At the same time, it is inconvenient to repair and maintain, and the line impedance is high.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide an energy storage unit cabinet, which can realize convenient expansion and flexible combination, and can provide customers with convenient, flexible and reliable services.

Another object of the present utility model is to provide an energy storage system with the above-mentioned energy storage unit cabinet.

The energy storage system according to the embodiment of the present utility model includes: a cabinet, the cabinet has an installation cavity; a plurality of battery clusters, the battery clusters are installed in the installation cavity; a positive busbar, the positive busbar A plurality of battery clusters are connected in parallel, and the end of the positive busbar extends out of the cabinet to form a positive connector; a negative busbar, the negative busbar connects a plurality of battery clusters in parallel, and the negative busbar The ends of the rows stick out of the cabinet to form the negative terminal.

According to the energy storage unit cabinet of the embodiment of the utility model, a plurality of battery clusters are connected in parallel through the positive busbar and the negative busbar, and the positive terminal and the negative terminal can realize the connection between the energy storage unit cabinets, and the operation is convenient. The energy storage unit cabinet has strong scalability, and the number of connected energy storage unit cabinets can be flexibly adjusted to meet the actual capacity demand. At the same time, the energy storage unit cabinets are highly arrangeable, and the number and arrangement of the energy storage unit cabinets can be adjusted according to the requirements of different installation sites. Moreover, the energy storage unit cabinet as a whole has the advantages of simple interface, low DC impedance, stable and reliable signal transmission, good system heat dissipation, easy maintenance and other advantages, and can provide customers with more convenient, flexible and reliable services.

In addition, the energy storage system according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to some embodiments of the present invention, the positive busbar and the negative busbar are copper bars.

According to some embodiments of the present invention, a plurality of the battery clusters are arranged along a set direction, the copper bar extends along the set direction and is plugged into a plurality of the battery clusters, the positive terminal and the The negative electrode connector is arranged on the end wall of one end of the cabinet body along the set direction.

According to some embodiments of the present invention, the energy storage unit cabinet further includes a confluence assembly, the confluence assembly is disposed in the installation cavity, and both the positive busbar and the negative busbar are connected to the confluence assembly.

According to some embodiments of the present invention, the bus assembly includes: a mounting plate, the mounting plate is arranged in the installation cavity; a bus bar, the bus bar is installed on the mounting plate, the positive busbar and The negative busbar is connected to the busbar.

According to some embodiments of the present invention, the battery cluster includes a plurality of battery packs, and the plurality of battery packs are vertically stacked and connected in series.

According to some embodiments of the present invention, the battery cluster further includes a control box, which is connected in series with the battery pack and connected to the positive busbar and the negative busbar.

According to some embodiments of the present invention, the energy storage unit cabinet further includes a liquid cooling assembly, and the liquid cooling assembly includes: a refrigerator; a plurality of liquid outlet pipes corresponding to a plurality of battery clusters, each of the The liquid outlet pipe communicates with the outlet of the refrigerator; a plurality of liquid return pipes corresponding to a plurality of battery clusters, each of the liquid return pipes communicates with the inlet of the refrigerator; each of the battery clusters A liquid cooling plate is enclosed, the inlet of each liquid cooling plate communicates with the corresponding liquid outlet pipe, and the outlet of each liquid cooling plate communicates with the corresponding liquid return pipe.

According to some embodiments of the present utility model, at least one of the liquid outlet pipe and the liquid cooling plate is provided with a flow regulating valve.

The energy storage system according to the embodiment of the utility model includes at least one energy storage unit cabinet according to the embodiment of the utility model.

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

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the electrical schematic diagram of the control box according to the utility model embodiment;

2 is an electrical schematic diagram of a busbar according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an energy storage unit cabinet according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a liquid cooling assembly according to an embodiment of the present invention.

Reference signs:

Energy storage unit cabinet 100;

Cabinet body 10; installation cavity 101;

battery cluster 20; battery pack 21; control box 22;

Positive pole busbar 30; positive pole connector 31; negative pole busbar 40; negative pole connector 41;

Bus assembly 50; mounting plate 51; bus bar 52; isolating switch 521; relay 522; fuse 523; shunt 524;

liquid cooling assembly 60;

refrigerator 61;

Outlet pipe 62; outlet 611 of refrigerator 61;

Liquid return pipe 63; inlet 612 of refrigerator 61;

Liquid cooling plate 64; flow regulating valve 65; liquid outlet main pipe 66; liquid return main pipe 67.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present utility model, "the first feature" and "the second feature" may include one or more of these features, and the meaning of "multiple" is two or more, and the first feature is included in the second feature. "Above" or "under" may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but through another feature between them, the first feature being on the second The features "above", "above" and "above" include that the first feature is directly above and obliquely above the second feature, or simply mean that the first feature is horizontally higher than the second feature.

The energy storage unit cabinet 100 according to the embodiment of the present utility model will be described below with reference to the accompanying drawings.

With the introduction of the concepts of "carbon peak" and "carbon neutrality" in the country, new energy power generation such as photovoltaics and wind power has entered a period of rapid development, and the storage of new energy power generation energy is very important. With the rapid development of lithium battery technology, electrochemical energy storage technology has gradually taken the lead in various energy storage technologies, and electrochemical energy storage has maintained a rapid growth trend in China for many years.

The application of energy storage technology to the power system is the key to ensuring the large-scale development of clean energy and the safe and economic operation of the power grid. Energy storage technology can make up for the missing "storage" function in the power system, change the synchronous mode of power production, transmission and use, and make the real-time balanced "rigid" power system more "flexible", especially when stabilizing large-scale The volatility brought by clean energy power generation connected to the grid improves the safety, economy and flexibility of grid operation.

Specifically, referring to FIG. 3 , the energy storage unit cabinet 100 according to the embodiment of the present utility model may include: a cabinet body 10 and a battery cluster 20 .

As shown in FIG. 3 , the cabinet body 10 defines an installation cavity 101 for installing and fixing the battery pack 20 . A plurality of battery clusters 20 are installed in the installation cavity 101 , the battery clusters 20 can work stably in the installation cavity 101 , and by adjusting the number of the battery clusters 20 , the capacity requirements in actual use can be met.

In order to meet the above requirements, in some related technologies, some layouts are limited by the distance of battery clusters, and cables are used for wiring. However, the battery cluster is connected by cables, and there are many cables in the battery cluster, which is not conducive to the heat dissipation of the system. At the same time, it is inconvenient to repair and maintain, and the line impedance is high. Moreover, if the primary wiring and secondary wiring are long, it will interfere with the transmission signal. If the layout size is too long, the site space requirements are high, the unit capacity is too large, and the flexibility of combination is poor.

In this application, however, as shown in FIG. 3 , the energy storage unit cabinet 100 may further include a positive busbar 30 and a negative busbar 40 . Wherein the positive pole busbar 30 is connected in parallel with a plurality of battery clusters 20, and the end of the positive pole busbar 30 protrudes from the cabinet 10 to form the positive pole connector 31, the negative pole busbar 40 is connected in parallel with a plurality of battery clusters 20, and the end of the negative pole busbar 40 Protrude from the cabinet body 10 to form a negative terminal 41 . In addition, the expansion of the energy storage unit cabinet 100 can be realized through the positive terminal 31 and the negative terminal 41. By connecting or disconnecting different numbers of energy storage unit cabinets 100, the required capacitance can be increased or decreased, thereby satisfying the requirements of the capacitance under different working conditions. demand.

Specifically, the positive busbar 30 is electrically connected to the positive pole of the battery cluster 20, and the negative busbar 40 is electrically connected to the negative pole of the battery cluster 20. Multiple battery clusters 20 are arranged in parallel. When a certain battery cluster 20 fails, it only needs to be removed and replaced. This group of faulty battery clusters 20 does not need to replace all the battery clusters 20 in the energy storage unit cabinet 100 , which improves the overall utilization rate of the energy storage unit cabinet 100 . Moreover, the end of the positive busbar 30 protrudes from the cabinet 10 to form a positive connector 31 , and the end of the negative busbar 40 extends out of the cabinet 10 to form a negative connector 41 , that is, the positive and negative poles of multiple battery clusters 20 pass through the positive busbar 30 And the negative busbar 40 leads to the cabinet body 10, which can realize the expansion demand and provide power supply under different working conditions.

In practical applications, when a larger capacitance is required, the positive terminals 31 of different energy storage unit cabinets 100 can be connected, and the negative terminal 41 of different energy storage unit cabinets 100 can be connected, that is, multiple energy storage unit cabinets 100 can be connected in parallel. Increased capacitance, convenient operation, can meet the demand for large capacitance.

It should be noted that the ends of the positive busbar 30 and the negative busbar 40 can protrude from the same side of the cabinet 10, or the ends of the positive busbar 30 and the negative busbar 40 can be on two different sides of the cabinet 10. Stretch out to meet different expansion arrangement needs. In the embodiment in which the ends of the positive busbar 30 and the negative busbar 40 protrude from the two-phase back sides of the cabinet body 10 at the same time, there are more places where the extended energy storage unit cabinet 100 can be arranged, and then the energy storage unit can be conveniently lifted. On the premise of the overall capacitance of the cabinet 100, the composability of the energy storage unit cabinet 100 is improved, and the expansion restriction of the energy storage unit cabinet 100 on the use site is reduced.

In some embodiments, the length of the positive busbar 30 and the negative busbar 40 protruding from the cabinet body 10 is the same, so that the operation of connecting the positive terminal 31 and the negative terminal 41 of different energy storage unit cabinets 100 is more convenient, and can avoid corresponding positive Impedance is increased because the level busbar 30 and the negative terminal 41 cannot be aligned, which reduces the risk of circuit breakage or leakage.

Compared with the related art, through the corresponding connection of the positive terminal 31 and the negative terminal 41 between the energy storage unit cabinets 100, the cost of much cable connection is saved, and the connection is simple and reliable. On the one hand, the operation is very convenient, and the expansion of the energy storage unit cabinet 100 can be realized by connecting the positive terminal 31 and the negative terminal 41 , which can be applied to large-scale energy storage projects. On the other hand, the energy storage unit cabinet 100 is highly combinable. Different numbers of energy storage unit cabinets 100 can be connected to the positive terminal 31 and the negative terminal 41 to expand the overall capacity. , cascaded into a larger capacity, and will not be restricted by the installation site, and has low requirements for site space, which greatly improves the combinability and arrangeability of the energy storage unit cabinet 100 .

When one of the energy storage unit cabinets 100 fails, or there is a need to check a certain energy storage unit cabinet 100, the faulty energy storage unit cabinet 100 can be repaired or inspected separately by disconnecting the corresponding positive and negative poles Maintenance and repair operations are very convenient, which can improve efficiency.

In addition, by connecting the corresponding positive terminal 31 and the negative terminal 41 to expand the capacitance, compared with the cable connection, the DC impedance can be effectively reduced, and the interference to the transmission signal caused by the long cable can be avoided, so that the signal transmission is more stable and reliable.

According to the energy storage unit cabinet 100 of the embodiment of the present utility model, a plurality of battery clusters 20 are connected in parallel through the positive busbar 30 and the negative busbar 40, and the positive terminal 31 and the negative terminal 41 can realize the connection between the energy storage unit cabinets 100 , easy to operate. The energy storage unit cabinet 100 has strong expandability, and the number of connected energy storage unit cabinets 100 can be flexibly adjusted to meet the actual capacity requirement. At the same time, the energy storage unit cabinets 100 are highly arrangeable, and the quantity and arrangement of the energy storage unit cabinets 100 can be adjusted according to the requirements of different installation sites. Moreover, the energy storage unit cabinet 100 as a whole has the advantages of simple interface, low DC impedance, stable and reliable signal transmission, good system heat dissipation, easy maintenance, etc., and can provide customers with more convenient, flexible and reliable services.

In some embodiments of the present utility model, the positive terminal 31 and the negative terminal 41 can realize cascading expansion through a tight waterproof communication interface, and the electrical connection between the positive terminal 31 and the negative terminal 41 is more stable and reliable, which can reduce the risk of leakage. The safety performance of the expanded circuit of the energy storage unit cabinet 100 is greatly improved.

According to some embodiments of the present invention, the positive busbar 30 and the negative busbar 40 can be copper bars, the resistivity of which is low, and unnecessary loss can be reduced when connecting circuits. Moreover, the installation is convenient and the flexibility is good, and the installation process can be reduced, and the operation steps of expanding the energy storage unit cabinet 100 can be reduced, and the working efficiency can be effectively improved. In addition, the bendability of the copper bar is large, and it can be bent to meet different layout requirements of the energy storage unit cabinet 100 while ensuring normal use.

In some embodiments, the positive busbar 30 and the negative busbar 40 are copper bars, and two energy storage unit cabinets 100 can be stacked along the height direction of the cabinet body 10 . Specifically, the copper bars of one of the energy storage unit cabinets 100 can extend upward along the height direction of the cabinet body 10 (the up-and-down direction shown in FIG. 3 ), and the copper bars of the other energy storage unit cabinet 100 can extend along the The height direction extends downwards, and the corresponding positive terminal 31 and negative terminal 41 are connected to achieve the effect of expanding the capacitance. Therefore, the two energy storage unit cabinets 100 are stacked and arranged along the height direction of the cabinet body 10, which can reduce the occupied area and save space resources.

In some embodiments, a plurality of battery clusters 20 can be arranged along a set direction, and the copper bars extend along a set direction and are inserted into the multiple battery clusters 20 . That is, the arrangement direction of the battery clusters 20 is the same as the extension direction of the copper bars. On the one hand, it can ensure that each battery cluster 20 can be connected to the circuit through the copper bars to realize the discharge operation. On the other hand, it is convenient to adjust the number of battery clusters 20 in the energy storage unit cabinet 100 so that the energy storage unit cabinet 100 has different capacitances to meet the requirements of different working conditions.

It should be noted that for the plugging of the copper bars and the battery cluster 20, the top of the battery cluster 20 can be provided with a connecting portion, and the copper bars can be inserted into the connecting portion, that is, the copper bars are inserted into the slots of the connecting portion to ensure The battery cluster 20 is electrically connected to the copper bar. In some embodiments, the connecting portion is two rectangular pieces arranged at intervals, and the copper bar is inserted between the two sheets arranged at intervals to realize electrical connection.

Specifically, the greater the demand for capacity under a certain working condition, in order to adapt the capacity of the energy storage unit cabinet 100 to the demand, the more battery clusters 20 are arranged in the set direction, and accordingly, the copper bars The extension length in the set direction can be longer to match with the battery clusters 20 to ensure that each battery cluster 20 can be connected through copper bars.

In addition, the set direction can be left and right as shown in FIG. 3 , or other directions, so as to match with different usage environments and improve the arrangeability of the energy storage unit cabinet 100 . Embodiments of the utility model are not particularly limited.

In an embodiment where a plurality of battery clusters 20 are arranged along a set direction, the positive terminal 31 and the negative terminal 41 can be arranged on the end wall of one end of the cabinet body 10 along the set direction, so that the formation of the positive terminal 31 and the negative terminal 41 The structure is simple, and multiple energy storage unit cabinets 100 can be electrically connected in a set direction through the positive terminal 31 and the negative terminal 41 , which can meet different layout requirements.

According to some embodiments of the present utility model, as shown in Fig. 2 and Fig. 3, the energy storage unit cabinet 100 also includes a confluence assembly 50, which is arranged in the installation cavity 101, which can reduce the occupied space resources and make the energy storage unit The structure of the cabinet 100 is more compact. In addition, both the positive busbar 30 and the negative busbar 40 are connected to a bus assembly 50 , and the current of multiple battery clusters 20 can be collected through the busbar assembly 50 .

In some embodiments, as shown in FIG. 3 , the bus assembly 50 may include a mounting plate 51 and a bus bar 52, the mounting plate 51 is disposed in the mounting cavity 101, and the mounting plate 51 is used instead of a traditional confluence cabinet, and the mounting plate 51 occupies The floor space is small and the installation is flexible. On the one hand, it can effectively use the space and reduce space waste; on the other hand, it is convenient for follow-up operation and convenient for later maintenance.

In addition, the mounting plate 51 can support and fix the bus bar 52, the bus bar 52 is installed on the mounting plate 51, the positive electrode bus bar 30 and the negative electrode bus bar 40 are connected to the bus bar 52, and the multiple battery clusters 20 can be concentrated through the bus bar 52. Current, to achieve large-capacity discharge operations.

In some specific embodiments, as shown in FIG. 2 , the busbar 52 may include a unit-level fuse 523 , an isolation switch 521 , a surge protector 526 and the like. When the current exceeds the set value, the fuse 523 can disconnect the circuit, which can play a role of short-circuit protection, and the protection is perfect. An isolating switch 521 can be provided next to the fuse 523, and the isolating switch 521 can open and close the circuit to meet the needs of different working conditions. The surge protector 526 can protect the circuit of the bus bar 52 in the event of a large voltage such as a lightning strike.

According to some embodiments of the present invention, as shown in FIG. 3 , the battery cluster 20 may include a plurality of battery packs 21 , and the plurality of battery packs 21 are stacked vertically (up and down as shown in FIG. 3 ) and connected in series. On the one hand, stacking multiple battery packs 21 vertically can reduce the occupied area of multiple battery packs 21 , and make the structure of the energy storage unit cabinet 100 more compact, so that the arrangement of the energy storage unit cabinet 100 is stronger. On the other hand, connecting multiple battery packs 21 in series can increase the voltage of the battery cluster 20 composed of battery packs 21, and connecting multiple battery clusters 20 in parallel through the positive busbar 30 and the negative busbar 40 can increase the voltage of the energy storage unit cabinet 100. Capacitance to meet different actual use needs.

In some specific embodiments, the battery cluster 20 can be composed of eight battery packs 21 connected in series, and each battery pack 21 has a power connection port, a communication power interface, and a liquid cooling input and output interface. And each energy storage unit cabinet 100 is connected with two battery clusters 20 in parallel to realize external power supply.

According to some embodiments of the present utility model, as shown in Fig. 1 and Fig. 3, each battery cluster 20 also includes a control box 22, and the control box 22 is connected in series with the battery pack 21, and the control box 22 is connected to the positive pole busbar 30 and the negative pole busbar The battery cluster 20 composed of the battery pack 21 and the control box 22 can be connected in parallel through the positive busbar 30 and the negative busbar 40, and the positive terminal 31 and the negative terminal formed by the positive busbar 30 and the negative busbar 40 41 to realize the discharge operation.

In some embodiments, as shown in FIG. 1 , in order to realize multiple functions, the control box 22 may contain a battery cluster 20 management unit for judging and protecting according to the battery cluster 20 circuit voltage and current, and the shunt 524 used for sampling, the disconnector The relay 522 used, the fuse 523 used for short-circuit protection, the isolating switch 521 used for isolation and maintenance, and the pre-charging resistor 525 are used. The control box 22 is reasonable in control and perfect in protection.

According to some embodiments of the present invention, the energy storage unit cabinet 100 further includes a liquid cooling assembly 60, which can be used to control the temperature rise of the battery pack 21 and reduce the risk of thermal runaway. Moreover, the temperature control of the energy storage unit cabinet 100 is balanced, and the temperature rise is small, which improves the service life of the product and ensures the product quality.

Specifically, as shown in FIG. 4 , the liquid cooling assembly 60 may include a refrigerator 61 , a liquid outlet pipe 62 , and a liquid return pipe 63 . Wherein, a plurality of liquid outlet pipes 62 are in one-to-one correspondence with a plurality of battery clusters 20, and each liquid outlet pipe 62 communicates with the outlet 611 of the refrigerator 61; a plurality of liquid return pipes 63 are in one-to-one correspondence with a plurality of battery clusters 20, each A liquid return pipe 63 communicates with the inlet 612 of the refrigerator 61 to form a liquid cooling circuit.

Continuing to refer to FIG. 4, each battery pack 21 is provided with a liquid cooling plate 64, the inlet of each liquid cooling plate 64 communicates with the corresponding liquid outlet pipe 62, and the outlet of each liquid cooling plate 64 communicates with the corresponding liquid return pipe 63 connected. In actual work, the coolant in the liquid cooling assembly 60 flows out from the outlet 611 of the refrigerator 61 to the liquid outlet pipe 62, and then flows into the liquid cooling plate 64 through the inlet of the liquid cooling plate 64, and the battery is taken away in the liquid cooling plate 64 The heat generated by the battery pack 21 reduces the risk of thermal runaway of the battery pack 21. The cooling liquid that has absorbed heat flows out from the outlet of the liquid cooling plate 64 and flows to the liquid return pipe 63 . The liquid return pipe 63 communicates with the inlet 612 of the refrigerator 61 , so that the cooling liquid flows back to the refrigerator 61 through the inlet 612 of the refrigerator 61 , thus completing a liquid cooling cycle.

In addition, the liquid cooling plate 64 may be arranged at the bottom of the battery pack 21 or at the top of the battery pack 21 , which is not particularly limited in this embodiment of the present invention.

It should be noted that the liquid outlet pipe 62 may be directly communicated with the refrigerator 61 , or may be communicated with the refrigerator 61 through the liquid outlet main pipe 66 . In an embodiment with a large number of battery clusters 20, since the number of liquid outlet pipes 62 corresponds to the battery cluster 20 one-to-one, if the number of liquid outlet pipes 62 is large, all the liquid outlet pipes 62 are connected to the refrigerator 61 , which not only increases the difficulty of layout, but also increases the cost. In some embodiments, by setting the liquid outlet main pipe 66, the liquid outlet main pipe 66 is directly connected with the refrigerator 61, and the liquid outlet pipe 62 is connected with a plurality of liquid outlet main pipes 66, that is, the cooling liquid first flows through the liquid outlet The main pipe 66 is then branched to a plurality of liquid outlet pipes 62 by the liquid outlet main pipe 66 . While achieving the same effect, it can reduce the difficulty of pipeline layout and effectively reduce the cost.

The embodiment of the utility model does not impose special restrictions on the connection method between the liquid return pipe 63 and the refrigerator 61. The liquid main pipe 67 is connected, that is, the cooling liquid flows through multiple liquid return pipes 63, and flows from the multiple liquid return pipes 63 to the liquid return main pipe 67, and then flows from the liquid return main pipe 67 to the refrigerator 61 to complete liquid cooling cycle. By arranging the liquid return main pipe 67, the difficulty of piping layout can be reduced, and the cost can be effectively reduced.

In addition, in some embodiments where the battery cluster 20 includes a control box 22, the control box 22 may also be provided with a liquid-cooled plate 64 because the control box 22 has a risk of short-circuiting and releasing heat, thereby damaging other components in the control box 22. The heat generated in the control box 22 can be taken away in time, thereby reducing the impact of high temperature on other components in the control box 22 .

In some embodiments, the liquid cooling assembly 60 may also include a liquid cooling control unit. During the actual charge and discharge process of the battery cluster 20, it can be controlled by The liquid-cooling control unit adjusts the liquid flow rate, liquid rate, and liquid temperature to control the battery pack 21 within an appropriate temperature range.

In some embodiments, as shown in FIG. 3 , at least one of the liquid outlet pipe 62 and the liquid cooling plate 64 is provided with a flow regulating valve 65, that is, a flow regulating valve 65 may be provided at the liquid outlet pipe 62, or A flow regulating valve 65 is set at the liquid cooling plate 64, or a flow regulating valve 65 is set at both the liquid outlet pipe 62 and the liquid cooling plate 64, so that the flow rate of the cooling liquid can be adjusted according to the actual heating of the battery pack 21 to meet the heat dissipation requirements .

Specifically, when the heat generated by the battery pack 21 is severe, the flow rate of the cooling liquid can be increased through the flow regulating valve 65 to quickly take away the heat generated by the battery pack 21 and avoid thermal runaway of the battery pack 21 . When the heat of the battery pack 21 is relatively slight, the flow rate of the coolant can be reduced through the flow regulating valve 65 to ensure the normal operation of the battery pack 21 and save energy.

In some embodiments, the outlet pipe 62 is provided with a flow regulating valve 65 , through which the coolant can be controlled to only flow into the failed battery cluster 20 , so as to avoid affecting the steady state of the normal working battery cluster 20 .

In other embodiments, as shown in FIG. 3 , flow regulating valves 65 are provided at the liquid outlet pipe 62 and the liquid cooling plate 64. When only part of the battery packs 21 in a battery cluster 20 fail and dissipate a large amount of heat, Through the flow regulating valve 65 provided at each liquid cold plate 64, the coolant can only flow through the failed liquid cold plate 64, which can take away the heat generated by the failed battery pack 21, and can avoid affecting other battery packs 21 for normal work.

In some embodiments where the liquid cooling assembly 60 includes a control unit, the control unit can adjust the valve opening of the flow regulating valve 65 according to the ambient temperature, battery temperature, charging and discharging power, and charging and discharging time, so that the battery can be removed accurately and in a timely manner. The heat generated by the package 21 controls the battery within a suitable temperature range.

It should be noted that, in the embodiment in which the flow regulating valve 65 is provided at the liquid cooling plate 64, the flow regulating valve 65 can be set outside the battery pack 21, on the one hand, to avoid damage to the battery pack 21 and to avoid electric leakage and damage to the battery pack 21. The structure, on the other hand, facilitates installation.

The energy storage system according to the embodiment of the present utility model includes the energy storage unit cabinet 100 according to the embodiment of the present utility model. Since the energy storage unit cabinet 100 according to the embodiment of the present utility model has the above-mentioned beneficial technical effects, it is therefore implemented according to the utility model In the example energy storage system, a plurality of battery clusters 20 are connected in parallel through the positive busbar 30 and the negative busbar 40, and the positive terminal 31 and the negative terminal 41 can realize the connection between the energy storage unit cabinets 100, and the operation is convenient. The energy storage unit cabinet 100 has strong expandability, and the number of connected energy storage unit cabinets 100 can be flexibly adjusted to meet the actual capacity requirement. At the same time, the energy storage unit cabinets 100 are highly arrangeable, and the quantity and arrangement can be adjusted according to the requirements of different installation sites. Moreover, the energy storage unit cabinet 100 as a whole has the advantages of simple interface, low DC impedance, stable and reliable signal transmission, good system heat dissipation, easy maintenance, etc., and can provide customers with more convenient, flexible and reliable services.

In addition, there may be one energy storage unit cabinet 100 of the energy storage system, or there may be multiple ones, so as to meet different capacity requirements in practical applications.

It should be noted that the multiple energy storage unit cabinets 100 of the energy storage system can be arranged in series or in parallel, which is not particularly limited in the embodiment of the present invention.

In addition, the external communication and power supply required by the entire product can be based on the customized interface plug-in, and a sufficient number of interface terminals can be reserved in the appropriate position of the product as needed to meet the actual needs.

Other configurations and operations of the energy storage system according to the embodiments of the present utility model are known to those skilled in the art and will not be described in detail here.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In the description of this specification, descriptions referring to the terms "embodiment", "specific embodiment", "example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention. In at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (8)

1. An energy storage unit cabinet, comprising:

a cabinet body (10), wherein the cabinet body (10) is provided with a mounting cavity (101);

a plurality of battery clusters (20), the battery clusters (20) being mounted within the mounting cavity (101);

the positive electrode busbar (30), the positive electrode busbar (30) is connected with a plurality of battery clusters (20) in parallel, and the end part of the positive electrode busbar (30) extends out of the cabinet body (10) to form a positive electrode joint (31);

a negative busbar (40), wherein the negative busbar (40) is connected with a plurality of battery clusters (20) in parallel, and the end part of the negative busbar (40) extends out of the cabinet body (10) to form a negative joint (41);

the busbar assembly (50) is arranged in the mounting cavity (101), and the positive electrode busbar (30) and the negative electrode busbar (40) are connected with the busbar assembly (50);

the bus assembly (50) includes:

the mounting plate (51) is arranged in the mounting cavity (101);

and the busbar (52) is arranged on the mounting plate (51), and the positive electrode busbar (30) and the negative electrode busbar (40) are connected with the busbar (52).

2. The energy storage unit cabinet according to claim 1, wherein the positive busbar (30) and the negative busbar (40) are copper bars.

3. The energy storage unit cabinet according to claim 2, wherein a plurality of the battery clusters (20) are arranged along a set direction, the copper bars extend along the set direction and are spliced with the plurality of the battery clusters (20),

the positive electrode joint (31) and the negative electrode joint (41) are arranged on the end wall of one end of the cabinet body (10) along the set direction.

4. A tank according to any one of claims 1-3, characterized in that the battery cluster (20) comprises a plurality of battery packs (21), a plurality of said battery packs (21) being placed in vertical stacks and connected in series.

5. The energy storage unit cabinet according to claim 4, wherein the battery cluster (20) further comprises a control box (22), the control box (22) being connected in series with the battery pack (21) and connected with the positive busbar (30) and the negative busbar (40).

6. The energy storage unit cabinet of claim 4, further comprising a liquid cooling assembly comprising:

a refrigerating machine;

a plurality of liquid outlet pipes which are in one-to-one correspondence with a plurality of the battery clusters (20), wherein each liquid outlet pipe is communicated with an outlet of the refrigerator;

a plurality of liquid return pipes which are in one-to-one correspondence with a plurality of battery clusters (20), wherein each liquid return pipe is communicated with an inlet of the refrigerator;

each battery pack (21) is provided with a liquid cooling plate, an inlet of each liquid cooling plate is communicated with a corresponding liquid outlet pipe, and an outlet of each liquid cooling plate is communicated with a corresponding liquid return pipe.

7. The energy storage unit cabinet of claim 6, wherein at least one of the liquid outlet pipe and the liquid cooling plate is provided with a flow regulating valve.

8. An energy storage system, characterized by comprising at least one energy storage unit cabinet according to any of claims 1-7.

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