Energy storage container

Abstract

The application discloses an energy storage container, which comprises an energy storage box body, a refrigeration part, a battery part and a converter part, the converter part is located at the end of the length direction of the energy storage box body, a plurality of battery clusters, each battery cluster comprises a plurality of battery packs connected in series and / or in parallel, and each battery cluster is distributed in parallel along the width direction of the energy storage box body to form two battery cluster groups in the battery part, a plurality of converters, each converter is connected with each battery cluster one by one, and each converter is distributed in parallel along the width direction of the energy storage box body to form two converter groups in the converter part, and a refrigerator installed in the refrigeration part and adapted to adjust the temperature of each battery pack in the battery cluster and / or the converter. The energy storage container can reduce the floor area of the energy storage system, and can also adjust the output power of the battery cluster to ensure the discharge balance between the battery clusters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage systems, in particular to an energy storage container. BACKGROUND

[0002] The energy storage system is generally composed of battery packs in series or parallel, the battery packs are connected in series to form battery clusters, and multiple battery clusters are connected in parallel to form an energy storage container. The energy storage container is connected with a converter, and the converter is connected with a power grid end to realize discharging and charging of the energy storage system. Each battery cluster includes a high-voltage box, which is used as an interface component for external electrical and data communication. The high-voltage box generally includes a disconnecting switch, a positive main contactor, a negative main contactor, a pre-charge resistor, and a pre-charge relay. The disconnecting switch is used to disconnect the output of the high-voltage box in an alarm state by manual or automatic means. When the positive main contactor and the negative main contactor are closed, the high-voltage box can establish a connection between the battery cluster and the converter. The pre-charge resistor and the pre-charge relay are used to pre-charge the capacitor devices in the line before the high-voltage box is connected to avoid damage to the capacitor devices by instantaneous voltage. The converter is a power conversion device in the energy storage system, which has a DC / AC converter inside. The DC / AC converter can convert the direct current output by the energy storage container into alternating current and output it to the power grid end, or convert the alternating current from the power grid end into direct current to charge the battery cluster.

[0003] Since the energy storage container needs to be connected to the power grid end through the converter, the existence of the converter results in a large footprint of the entire energy storage system. Moreover, the high-voltage box in the energy storage container can only provide basic overcurrent protection, short-circuit protection, and other protection functions, and cannot adjust the output power of the battery cluster, resulting in uneven discharging between the battery clusters. SUMMARY

[0004] The present application aims to overcome the above-mentioned defects or problems in the background art, and to provide an energy storage container that can reduce the footprint of the energy storage system and adjust the output power of the battery cluster to ensure balanced discharging between the battery clusters.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] An energy storage container, comprising: an energy storage box body comprising a refrigeration part, a battery part and a converter part, the converter part being located at the end of the length direction of the energy storage box body; a plurality of battery clusters, each of the battery clusters comprising a plurality of battery packs connected in series and / or in parallel, and each of the battery clusters being distributed side by side in the width direction of the energy storage box body in the battery part to form two battery cluster groups; a plurality of converters, each of the converters being connected to each of the battery clusters one by one, and each of the converters being distributed side by side in the width direction of the energy storage box body in the converter part to form two converter groups; and a refrigerator installed in the refrigeration part and adapted to adjust the temperature of each of the battery packs in each of the battery clusters and / or each of the converters.

[0007] Further, corresponding to the position of each of the battery cluster groups in the width direction of the energy storage box body where each of the battery clusters is located, the front end of each of the battery clusters faces the outside of the energy storage box body, and the rear end faces the other of the battery cluster groups; and corresponding to the position of each of the converter groups in the width direction of the energy storage box body where each of the converters is located, the front end of each of the converters faces the outside of the energy storage box body, and the rear end faces the other of the converter groups.

[0008] Further, the refrigerator is an air-cooled refrigeration device; the energy storage box body forms an air-cooled channel in the battery part and the converter part, and the refrigerator is adapted to deliver cooling air to each of the battery packs in each of the battery clusters and each of the converters through the air-cooled channel; the energy storage box body is provided with air outlets on both sides in the width direction and at the ends in the length direction of the converter part; after being output from the refrigerator, the cooling air passes through the battery part and reaches the converter part, and is delivered out of the energy storage box body through the air outlets at the converter part.

[0009] Further, the refrigerator is a liquid-cooled refrigeration device, which communicates with each of the battery packs in each of the battery clusters and each of the converters through a liquid-cooled pipeline to deliver and recover cooling liquid; after being output from the refrigerator, the cooling liquid passes through each of the battery packs in each of the battery clusters and is returned to the refrigerator through each of the converters.

[0010] Further, the refrigerator comprises an air-cooled refrigeration device and a liquid-cooled refrigeration device, the air-cooled refrigeration device delivers cooling air to each of the converters through an air-cooled channel provided in the energy storage box body, and the liquid-cooled refrigeration device communicates with each of the battery packs in each of the battery clusters through a liquid-cooled pipeline to deliver and recover cooling liquid; the energy storage box body is provided with air outlets on both sides in the width direction and at the ends in the length direction of the converter part.

[0011] Further, the refrigeration part, the battery part and the converter part are arranged in sequence and separated from each other in the length direction of the energy storage box body.

[0012] Further, in each of the battery clusters, the battery packs are arranged in sequence along the height direction of the energy storage box; and in each of the battery cluster groups, the battery clusters are arranged in sequence along the length direction of the energy storage box.

[0013] Further, in each of the battery clusters, the battery packs are arranged in sequence along the length direction of the energy storage box; and in each of the battery cluster groups, the battery clusters are arranged in sequence along the height direction of the energy storage box.

[0014] Further, the battery clusters in the same battery cluster group are separated from each other and are in communication with the adjacent battery clusters in another battery cluster group.

[0015] Further, the energy storage box is provided with openings on both sides in the width direction corresponding to the battery part and the converter part, and the battery packs and the converters are adapted to be loaded into or removed from the battery part and the converter part through the corresponding openings.

[0016] From the above description of the present application, the present application has the following beneficial effects relative to the prior art:

[0017] The present application provides an energy storage container, which installs a plurality of battery clusters in an energy storage box and sets a plurality of converters corresponding to the battery clusters one by one, and the converters can be connected with a power grid end, so that independent charging and discharging control of each battery cluster can be realized through the corresponding converters; relative to the conventional energy storage system or energy storage container, the energy storage container provided by the present application removes the high-voltage box corresponding to each battery cluster, uses the converter to control the on-off of the battery cluster output, and also removes the large converter outside the original energy storage container, which is smaller than the conventional energy storage system in terms of floor area, thereby improving the unit power density of the energy storage system, and is more convenient to use, without the need to provide a separate converter, thereby reducing the manufacturing cost; at the same time, the output power of each battery cluster can be adjusted through the converter, which also improves the response rate, reduces the current loss, realizes the discharge balance between the battery clusters, improves the battery utilization, reduces the battery bucket effect, avoids the influence of the low-energy battery on the discharge of the high-energy battery;

[0018] In addition, the refrigeration device is arranged in the energy storage box, and the refrigeration device can adjust the temperature of each battery pack and each converter in the battery cluster, so that the battery pack and the converter do not appear thermal runaway when working; wherein, the converter part for mounting the converter in the energy storage box is arranged at the end position of the length direction of the energy storage box, when the refrigeration device is a air-cooled refrigeration device, since the converter part is located at the end, air can be discharged from both sides and the end side, compared with the mode of discharging air only from both sides, the air volume can be increased, and the heat dissipation efficiency is improved; when the refrigeration device is a liquid-cooled refrigeration device, the converters with higher temperature are all concentrated in the converter part at a separate position, the arrangement of the liquid cooling pipeline for conveying the cooling liquid is more simple, the cooling liquid can flow back to the refrigeration device after passing through the converters, so that the liquid cooling pipelines are not interlaced due to the interlaced arrangement of the battery cluster and the converter;

[0019] Meanwhile, two groups of battery clusters and two groups of converters are arranged side by side in the width direction of the energy storage box, so that the space utilization of the energy storage container is improved, and the battery pack and the converter are convenient to load and unload; when adjusting the temperature of the battery pack and the converter, the cooling air or the cooling liquid can also pass through the two groups of battery clusters and the two groups of converters in parallel, so that the heat dissipation efficiency is higher, the heat loss is lower, and the temperature uniformity is better; wherein, when air cooling is adopted, the cooling air enters the converter part, first reaches the position between the two groups of converters, and then is sent to the two groups of converters on both sides of the width direction, and then is sent out from both sides of the width direction of the energy storage box.

[0020] The battery clusters in the two groups of battery clusters and the converters in the two groups of converters are arranged in the energy storage box in a manner that the rear ends are opposite to each other and the front ends are outward, so that the control parts of the battery clusters and the converters are exposed to the outside, and the battery clusters and the converters are convenient to operate; meanwhile, the air cooling channel can be formed between the two groups of battery clusters and the two groups of converters, the cooling air can be simultaneously conveyed to the two groups of battery clusters and the two groups of converters, or when liquid cooling is adopted, the cooling liquid can be conveyed through the main pipeline between the two groups of battery clusters or the two groups of converters, and then is sent into the corresponding battery cluster or converter through the branch pipeline arranged on the main pipeline; in summary, the arrangement of the heat dissipation channels of the battery clusters and the converters is more simple and regular.

[0021] The refrigeration part, the battery part and the converter part in the energy storage container are sequentially arranged and separated from each other along the length direction of the energy storage box, so that the cooling air or the cooling liquid of the refrigeration device can first pass through the battery pack with lower temperature, and then reach the converter with higher temperature, the overall air cooling channel or liquid cooling pipeline is arranged smoothly, and the flow of the cooling air and the cooling liquid is also more smooth.

[0022] When the battery pack is vertically arranged and the battery cluster is horizontally arranged, each battery cluster can be connected with the corresponding converter through the connecting line, and this layout facilitates the installation of the battery pack without the need to make large changes to the frame of the energy storage container; when the battery pack is horizontally arranged and the battery cluster is vertically arranged, each battery cluster can be at the same height position as the corresponding converter, and the end of each battery cluster is also adjacent to the corresponding converter, so the wiring is more convenient, the lines between different battery clusters do not need to be staggered, the wiring is more simple, and the risk of mutual influence between each battery cluster due to staggered wiring can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description are briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The structure topology diagram of the energy storage container in embodiment 1 of the present application;

[0025] Figure 2 The structure topology diagram of the converter in embodiment 1 of the present application;

[0026] Figure 3 The structure layout diagram of the energy storage container in embodiment 1 of the present application Figure 1 ;

[0027] Figure 4 The structure layout diagram of the energy storage container in embodiment 1 of the present application Figure 2 ;

[0028] Figure 5 The air cooling structure diagram of the energy storage container in embodiment 1 of the present application;

[0029] Figure 6 The liquid cooling structure diagram of the energy storage container in embodiment 2 of the present application;

[0030] Figure 7 The structure layout diagram of the energy storage container in embodiment 3 of the present application Figure 1 ;

[0031] Figure 8 The structure layout diagram of the energy storage container in embodiment 3 of the present application Figure 2 ;

[0032] Figure 9 The air cooling structure diagram of the energy storage container in embodiment 3 of the present application;

[0033] Figure 10 FIG. 1 is a schematic diagram of a liquid cooling heat dissipation structure of an energy storage container according to an embodiment of the present application.

[0034] Explanation of main reference numerals:

[0035] Energy storage box 1; battery cluster 2; battery pack 3; battery part 30; converter 4; conversion part 40; DC contactor 41; pre-charge contactor 42; disconnector 43; DC / AC bidirectional converter 44; AC contactor 45; battery management module 5; grid end 6; refrigerator 7; refrigeration part 70. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] In the claims, specification, and above drawings of the present application, unless otherwise expressly defined, the terms such as "first", "second", or "third" are used only to distinguish different objects, and are not used to describe a specific sequence.

[0038] In the claims, specification, and above drawings of the present application, unless otherwise expressly defined, the terms such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation and position relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present application.

[0039] In the claims, specification, and above drawings of the present application, unless otherwise expressly defined, the terms such as "fixedly connected" or "fixedly connected" should be understood broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration, and fixed connection through other devices or elements.

[0040] In the claims, specification, and above drawings of the present application, the terms "include", "have", and their variants are intended to mean "contain but not limited to".

[0041] Embodiment 1

[0042] The embodiment provides a storage energy container which is suitable for being connected with a grid end 6.

[0043] The grid end 6 herein refers to a port connected with a grid, which can be a transformer in reality. The storage energy container is connected with a first end of the transformer, a second end of the transformer is connected with an alternating current bus, and the alternating current bus is connected with the grid. In the embodiment, the storage energy container does not include the transformer. A plurality of groups of storage energy containers can share one transformer, or each storage energy container can use one transformer independently, and each transformer is connected with the alternating current bus.

[0044] The storage energy container in the embodiment mainly comprises a storage energy container body 1, a battery cluster 2, a converter 4 and a battery management module 5. The number of the storage energy container body 1 is one, and the number of the battery cluster 2, the converter 4 and the battery management module 5 can be multiple, and the three are configured in one-to-one correspondence. The battery management module 5 can be built-in in the converter 4 or the battery cluster 2.

[0045] The topological structure of the storage energy container is described below. The topological structure herein refers to the electrical or communication connection relationship between the parts in the storage energy container.

[0046] Referring to Figure 1 , a plurality of battery packs 3, a plurality of storage energy converters 4 and a plurality of battery management modules 5 are arranged in the storage energy container body 1. The plurality of battery packs 3 form the battery cluster 2 through series connection and / or parallel connection, and the battery clusters 2 are independent of each other. The battery packs 3 in each battery cluster 2 are combined by battery monomers, and each battery pack 3 comprises a positive output end and a negative output end. According to actual needs, the battery packs 3 can be connected in series, that is, the positive and negative poles of adjacent battery packs 3 are connected, and the positive and negative poles of the battery packs 3 together form the total positive output end and the total negative output end of the battery cluster 2. Of course, in other embodiments, the battery packs 3 can also be connected in parallel, which is not limited herein.

[0047] For each battery cluster 2, the working information thereof can be collected by the management unit at the battery pack 3 level, such as the voltage, current and state of charge of each battery pack 3. Through the working information of each battery pack 3, the overall battery information of the battery cluster 2 can be obtained.

[0048] Corresponding to each battery cluster 2, a converter 4 is arranged. The input end of each converter 4 is connected with the output end of the corresponding battery cluster 2, and the output end thereof is suitable for being connected with the grid end 6. Herein, the converter 4 is used for realizing bidirectional conversion of current from direct current to alternating current and from alternating current to direct current.

[0049] Specifically, referring to Figure 2Fig. 4 shows the internal structure of the above-mentioned converter 4. The converter 4 comprises a DC contactor 41, a pre-charge contactor 42, a disconnector 43, a DC / AC bidirectional converter 44 and an AC contactor 45. The first end of the DC contactor 41 is connected to the input end of the corresponding battery cluster 2 of the energy storage converter 4, the second end is connected to the first end of the disconnector 43, the second end of the disconnector 43 is connected to the first end of the DC / AC bidirectional converter 44, the second end of the DC / AC bidirectional converter 44 is connected to the first end of the AC contactor 45, and the second end of the AC contactor 45 is connected to the grid end 6.

[0050] The DC contactor 41 comprises a DC main contactor and a DC pre-charge contactor 42 connected in parallel, and the DC pre-charge contactor 42 comprises a DC pre-charge resistor and a DC pre-charge relay connected in series.

[0051] Specifically, the DC side of the energy storage converter 4 comprises a positive line and a negative line, the first ends of which are respectively connected to the total positive output end and the total negative output end of the corresponding battery cluster 2. The positive line and the negative line are respectively provided with a DC main contactor, and when both of them are closed, the output of the battery cluster 2 is conducted to the energy storage converter 4, and when both of them are disconnected, the output of the battery cluster 2 is disconnected. In other embodiments, a current sensor can also be provided on the positive line to collect current information on the positive line, realize current detection on the positive line, and determine in real time whether the battery cluster 2 has abnormal conditions such as overcurrent, overheating, short circuit, overvoltage or undervoltage. In addition, in other embodiments, a fuse can also be provided in series on the positive line or the negative line to directly shut off the connection between the battery cluster 2 and the grid end 6 when the current is too large, thereby protecting the battery cluster 2.

[0052] The two DC pre-charge contactors 42 are respectively provided in parallel with the two DC main contactors on the above-mentioned positive line and negative line. Before the DC main contactor needs to be closed, the DC main contactor can be charged through the DC pre-charge contactor 42, thereby avoiding damage to the capacitor device in the DC main contactor due to excessive instantaneous current when it is closed.

[0053] In this embodiment, the disconnector 43 is provided between the DC contactor 41 and the DC / AC bidirectional converter 44, and in other embodiments, it can also be provided between the output end of the battery cluster 2 and the DC contactor 41. When the battery cluster 2 has abnormal conditions such as overcurrent, overheating, short circuit, overvoltage or undervoltage, the disconnector 43 can be disconnected to cut off the positive line and the negative line, and after the fault of the battery cluster 2 is eliminated, the disconnector 43 is closed to conduct the positive line and the negative line at the same time.

[0054] The DC / AC bidirectional converter 44 can adopt a non-isolated converter or an isolated converter. In the embodiment, each energy storage converter 4 corresponds to only one battery cluster 2, and the power is small. In order to reduce the cost of the energy storage container, the non-isolated converter can be adopted. Of course, in other embodiments, the isolated converter can also be adopted to output more stable three-phase alternating current.

[0055] Taking the non-isolated converter as an example, the non-isolated converter includes a full-bridge reversible SPWM rectifier circuit composed of four switching tubes, and a Buck-Boost type bidirectional DC / DC conversion circuit. When the converter is in a charging mode, i.e., the alternating current at the grid end 6 is converted into direct current and input to the battery cluster 2, the full-bridge can work in the SPWM rectification state to convert the alternating current at the grid end 6 into direct current and output to the direct current bus. Then, the DC / DC conversion circuit converts the direct current into alternating current in the Buck type step-down manner to charge the battery cluster 2. When the converter is in a discharging mode, i.e., the direct current of the battery cluster 2 is converted into alternating current and output to the grid end 6, the full-bridge can work in the SPWM inverter state to convert the direct current on the direct current bus into alternating current to supply power to the grid end 6. At this time, the DC / DC conversion circuit constitutes a Boost step-up circuit to provide high voltage for the direct current bus.

[0056] Further, in the embodiment, the battery cluster 2 is directly connected to the energy storage converter 4, and the power line bundle and the communication line bundle therebetween are short. Even if the non-isolated converter is adopted, the electromagnetic interference generated thereby will not greatly affect the communication between the energy storage converter 4 and the battery cluster 2.

[0057] The first end of the alternating current contactor 45 is connected to the DC / AC bidirectional converter 44, and the other end can be connected to the grid end 6. Further, the output end of the alternating current contactor 45 can be provided as an integrated output interface which is exposed to the energy storage container 1 to be connected to the grid end 6. Specifically, the three-phase output of the alternating current contactor 45 can be arranged in a fixed order and integrated to form an integrated output interface with a fixed form. The integrated output interface has a corresponding identification for each phase. When the energy storage converter 4 is connected to the transformer copper bar, each phase of the integrated output interface can be connected to the copper bar corresponding to the phase of the transformer, and the adaptive connection of the three-phase output phase of the energy storage converter 4 and the phase of the grid end 6 is realized through the wiring matching.

[0058] Reference Figure 1The battery management module 5 is arranged for each battery cluster 2, and each battery management module 5 is in communication connection with the corresponding battery cluster 2 and the corresponding converter 4, which is used to collect the battery information of the battery cluster 2, and control the converter 4 to adjust the output power based on the battery information. The battery information of the battery cluster 2 can include the total voltage, total current and / or total state of charge of the battery cluster 2. The battery management module 5 is in communication connection with the battery cluster 2 and the converter 4, the battery cluster 2 can collect the battery information of each battery pack 3 through the internal battery management unit, and then the battery information is aggregated to the battery management module 5, and the battery management module 5 obtains the total battery information of the battery cluster 2 according to the battery information, and controls the corresponding converter 4 to adjust the output power based on the output power of each converter 4 and the required output power of the energy storage container. Here, each converter 4 is in communication connection to obtain the output power information of each converter 4.

[0059] For example, when the total state of charge of the battery cluster 2 corresponding to a certain battery management module 5 is low, the output power of the converter 4 corresponding to the battery cluster 2 can be reduced, and when other converters 4 learn that the output power of the converter 4 is reduced, the output power of the converter 4 can be adjusted according to the actual situation to ensure that the energy storage container can ensure that the battery cluster 2 can be discharged evenly with other battery clusters 2.

[0060] In addition, the battery management module 5 can also be used to collect the state information of the battery cluster 2, and the state information is used to identify the working state of the battery cluster 2, such as whether the battery cluster 2 is overvoltage, overcurrent, undervoltage, etc. When the battery management module 5 obtains that the battery cluster 2 is running abnormally, the DC side contactor of the converter 4 can be controlled to be disconnected to avoid that the fault of the battery cluster 2 affects the converter 4 and other battery clusters 2.

[0061] The following describes the physical installation and connection structure of the energy storage container.

[0062] Referring to Figure 3 which is a top view schematic diagram of the energy storage container. The energy storage container 1 is a container type structure, which is a rectangular parallelepiped structure, and can be defined as a length direction, a width direction and a height direction according to its shape. The refrigeration part 70, the battery part 30 and the converter part 40 are formed in the internal chamber of the energy storage container 1, and the converter part 40 is located at the end of the length direction of the energy storage container 1.

[0063] More specifically, the refrigeration part 70, the battery part 30 and the converter part 40 are arranged in sequence and separated from each other along the length direction of the energy storage container 1. Here, refer to Figure 3 to Figure 3For example, the left and right ends of the length direction, the refrigeration part 70 is located on the left side of the length direction, the battery part 30 is located in the middle, and the converter part 40 is located on the right side of the length direction. In this embodiment, the refrigeration part 70, the battery part 30 and the converter part 40 are separated from each other. The separation here does not mean complete isolation in space, but means having a shelter in space, for example, different parts are separated by fireproof bubble surface, screen mesh, etc. to avoid mutual influence between different parts.

[0064] Referring to Figure 3 , each battery cluster 2 and converter 4 is arranged in parallel along the width direction of the energy storage box 1 in the battery part 30 and the converter part 40, respectively. In the energy storage box 1, the actual minimum unit is the battery pack 3, and a plurality of battery packs 3 are connected to form a corresponding battery cluster 2. In this embodiment, taking the battery pack 3 located at the topmost layer as an example, it extends to form rows and columns along the length direction and the width direction, respectively, and there are two rows and four columns of battery packs 3. The battery cluster 2 corresponding to all battery packs 3 located in the range of each row forms a battery cluster group. Similarly, there are two rows and one column of combinations of converters 4, and each row is a converter group, and each converter group includes a plurality of converters 4.

[0065] Further, in order to facilitate the installation and removal of the battery pack 3 and the converter 4, the energy storage box 1 is provided with an opening suitable for being opened and closed on both sides in the width direction corresponding to the battery part 30 and the converter part 40, and the battery pack 3 and the converter 4 are suitable for being loaded into or removed from the battery part 30 and the converter part 40 through the corresponding opening. Specifically, the side plates on both sides of the energy storage box 1 in the width direction can be designed to be movable, for example, the side plates can be removed or can be rotated to be opened. When it is necessary to install or remove the battery pack 3 and the converter 4, the side plates are opened to make the battery part 30 and the converter part 40 in the energy storage box 1 open, and at this time the battery pack 3 and the converter 4 can be loaded or removed from both sides of the energy storage box 1 in the width direction. This installation method can directly form two groups of parallel arranged battery cluster groups and converter groups in the energy storage box 1, and the structure is more regular, which is convenient for wiring and arrangement of air cooling or liquid cooling heat dissipation channels.

[0066] Among them, corresponding to the position of the battery cluster group in which each battery cluster is located in the width direction of the energy storage box 1, the front end of the battery cluster 2 faces the outside of the energy storage box 1, and the rear end faces the other battery cluster group; corresponding to the position of the converter group in which each converter is located in the width direction of the energy storage box 1, the front end of the converter 4 faces the outside of the energy storage box 1, and the rear end faces the other converter group.

[0067] In addition, referring to Figure 3, each battery cluster 2 in the same battery cluster group is separated from each other and communicated with adjacent battery cluster 2 in another battery cluster group. That is, in the width direction, two battery packs 3 at the same height position are communicated with each other and no shielding is arranged between them. Generally, the rear end of the battery pack 3 faces the inner side of the energy storage box 1, and the front end faces the outer side of the energy storage box 1, and the operation part of the battery pack 3 is also arranged at the front end of the battery pack 3, so that the battery pack 3 can be conveniently operated; at the same time, the rear end of the battery pack 3 is generally the air inlet end of air cooling or the liquid inlet end of liquid cooling, and the rear ends of the two battery packs 3 are arranged opposite to each other and no shielding is arranged, so that the arrangement of the cooling channel during air cooling or liquid cooling is facilitated, and the space occupation of the cooling system is reduced. In the same battery cluster group, each battery cluster 2 is separated from each other, and the separation is the same as that of the refrigeration part 70, the battery part 30 and the converter part 40, which is not completely isolated in space, but means that there is shielding in space, for example, different parts are separated by flame-retardant bubble surface, mesh and the like, so as to avoid mutual influence between adjacent battery clusters 2.

[0068] With reference to Figure 4 , which is a side view schematic diagram of the energy storage container, and shows the wiring relationship between each battery cluster 2 and the corresponding converter 4. In the embodiment, the battery clusters 2 in the same battery cluster group are arranged along the length direction, the battery packs 3 inside the battery cluster 2 are arranged along the height direction, each battery pack 3 in each battery cluster 2 is connected in series, and a wiring terminal is led out at the last battery pack 3, which is connected with the corresponding converter 4 located at the end position of the energy storage box 1 through the connecting line. In the same converter group, each converter 4 is arranged along the height direction.

[0069] With reference to Figure 5 In the embodiment, the refrigeration device 7 is an air-cooled refrigeration device, that is, the energy storage box 1 adopts air cooling to cool the devices inside it. The energy storage box 1 is provided with an air cooling channel in the battery part 30 and the converter part 40, and the refrigeration device 7 is adapted to deliver cooling air to the battery packs 3 in each battery cluster 2 and the converters 4 through the air cooling channel, and the energy storage box 1 is provided with air outlets corresponding to the positions of the converter part 40 on both sides in the width direction and the ends in the length direction.

[0070] Specifically, the refrigeration part 70 generates cooling air with a lower temperature, which is then delivered into the battery part 30 through the air cooling channel, and then delivered into the converter part 40 through the air cooling channel in the battery part 30, and finally delivered out of the energy storage box 1 through the air outlet at the converter part 40. In the present embodiment, the refrigeration part 70, the battery part 30 and the converter part 40 are separated from each other, and the battery clusters 2 in the same group of battery clusters in the battery part 30 are also separated from each other, and the air cooling channels are arranged at the separated parts. The air cooling channels actually include the holes in the plates for forming the barriers and the cavity parts in the energy storage box 1 for allowing the air to pass through. The cavity parts can include the gaps between two battery clusters 2 or two converters 4 at the same height and opposite positions. After the cooling air enters the battery part 30, it passes through the battery clusters 2 arranged in the length direction one by one, and then enters the converter part 40. Preferably, the position where the cooling air enters the converter part 40 can be arranged at the middle of the two converter groups in the width direction, and then the cooling air can be delivered to the two sides in the width direction, passes through the converters 4 in the two converter groups, and is delivered out of the energy storage box 1 through the air outlet at the end position of the energy storage box 1. The air outlet is arranged at the two sides and the end side of the end position of the energy storage box 1 corresponding to the converter part 40, and the air can be effectively delivered out through the three sides, so that the air delivery amount and the heat dissipation efficiency can be effectively improved. In the battery part 30, a plurality of air cooling channels can be arranged between the adjacent battery clusters 2 to improve the heat dissipation efficiency.

[0071] It should be noted that, Figure 5 The arrows for indicating the delivery direction of the cooling air in the present embodiment are only for illustration, and do not mean that the cooling air is actually delivered in the direction indicated by the arrows, and they do not constitute a limitation on the technical solutions described in the present embodiment.

[0072] The energy storage container provided by the embodiment installs a plurality of battery clusters 2 in the energy storage box 1, and a plurality of converters 4 are connected with each battery cluster 2 one by one, the converter 4 can be connected with the grid end 6, so that the independent charging and discharging control of each battery cluster 2 can be realized through the corresponding converter 4; compared with the conventional energy storage system or energy storage container, the energy storage container provided by the embodiment removes the high-voltage box corresponding to each battery cluster 2 originally, uses the converter 4 to control the on-off of the output of the battery cluster 2, and also removes the large converter 4 outside the energy storage container originally, compared with the conventional energy storage system, the energy storage container has smaller floor area, is more convenient to use, does not need to be equipped with a separate converter 4, reduces the manufacturing cost, at the same time, the output power of each battery cluster 2 can be adjusted through the converter 4, the response rate can also be improved, the current loss can be reduced, the discharging balance between the battery clusters 2 can be realized, the battery utilization rate can be improved, the battery bucket effect can be reduced, and the influence of the low-energy battery on the discharging of the high-energy battery is avoided; in addition, the refrigerator 7 is arranged in the energy storage box 1, the refrigerator 7 can adjust the temperature of each battery pack 3 in the battery cluster 2 and each converter 4, and heat runaway of the battery pack 3 and the converter 4 during work is avoided; wherein, the converter part 40 for installing the converter 4 in the energy storage box 1 is arranged at the end position in the length direction of the energy storage box 1, when the refrigerator 7 is a air-cooled refrigeration equipment, since the converter part 40 is located at the end, air can be discharged from both sides and the end side, compared with the mode of discharging air only from both sides, the structure can improve the air volume, and then improve the heat dissipation efficiency.

[0073] Embodiment 2

[0074] Compared with embodiment 1, the difference between embodiment 2 and embodiment 1 is that the refrigerator 7 in embodiment 2 adopts a liquid cooling refrigeration equipment, and the liquid cooling refrigeration equipment communicates with the battery pack 3 in each battery cluster 2 and each converter 4 through a liquid cooling pipeline to transport and recover the cooling liquid.

[0075] Specifically, referring to Figure 6 The liquid cooling pipeline is arranged in the energy storage container, the inlet of the liquid cooling pipeline communicates with the cooling liquid outlet of the refrigerator 7, and the cooling liquid is output through the liquid cooling pipeline, then sequentially passes through each battery pack 3, and then flows back to the refrigerator 7 after passing through each converter 4. Among them, for each battery pack 3 in the same battery cluster 2, the liquid cooling pipelines are connected in series with each other; for each battery cluster 2 in the same battery cluster group, the liquid cooling pipelines are connected in series with each other; finally, the liquid cooling pipeline communicates with the converter part 40, and the liquid cooling pipelines corresponding to the converters 4 of each battery cluster 2 in the battery cluster group in the converter part 40 are also connected in series with each other, and then the liquid cooling pipeline communicates with the cooling liquid recovery port of the refrigerator 7. For two battery cluster groups and two converter groups, two groups of independent liquid cooling pipelines are arranged, and the two groups of liquid cooling pipelines respectively communicate with the refrigerator 7.

[0076] It should be noted that Figure 6The arrow used for identifying the direction of the cooling liquid delivery is only a schematic and does not mean that the cooling liquid is delivered in the direction indicated by the arrow in the actual application, which does not constitute a limitation on the technical solutions described in this embodiment.

[0077] The energy storage container provided in this embodiment concentrates all the higher-temperature converters 4 in the conversion part 40 in a single position when the refrigeration device 7 is a liquid cooling refrigeration device, the arrangement of the liquid cooling pipes for delivering the cooling liquid is more simple, and the cooling liquid can be concentrated to flow back to the refrigeration device 7 after passing through the converters 4, thereby avoiding the interlaced arrangement of the battery clusters 2 and the converters 4 to cause the liquid cooling pipes to be interlaced with each other.

[0078] Embodiment 3

[0079] Embodiment 3 is different from Embodiment 1 in that the arrangement of the battery clusters 2 in the energy storage box 1 in Embodiment 3 is different from that in Embodiment 1.

[0080] With reference to Figure 7 In this embodiment, the battery packs 3 in each battery cluster 2 are arranged in sequence along the length direction of the energy storage box 1, and the battery clusters 2 in each battery cluster group are arranged in sequence along the height direction of the energy storage box 1. Figure 8 In this embodiment, the battery clusters 2 in the same battery cluster group are spaced apart in the height direction, and the battery packs 3 at the same height position in the same battery cluster group are connected to form a battery cluster 2. After the battery cluster 2 is formed, the wiring end of the battery cluster 2 can be directly connected to the converter 4 at the same height position. The wiring of this arrangement is more simple, the connection lines do not need to be interlaced, and the wiring distance is shorter.

[0081] With reference to Figure 9 In this embodiment, the refrigeration device 7 is a air cooling refrigeration device. Since there is no barrier between the battery clusters 2 in the battery part 30 in the length direction, the cooling air can be directly delivered to the positions where the battery clusters 2 are located, and then enter the positions where the converters 4 are located after passing through the battery clusters 2, and then be sent out through the air outlets at the converters 4. Since the battery clusters 2 are arranged in this way, the air cooling channels corresponding to different battery clusters 2 do not affect each other, and the rapid cooling of each battery cluster 2 can be ensured.

[0082] It should be noted that, Figure 9 The arrow used for identifying the direction of the cooling air delivery is only a schematic and does not mean that the cooling air is delivered in the direction indicated by the arrow in the actual application, which does not constitute a limitation on the technical solutions described in this embodiment.

[0083] Embodiment 4

[0084] Embodiment 4 differs from Embodiment 3 in that the refrigeration device 7 in Embodiment 4 is a liquid cooling refrigeration device which communicates with the battery packs 3 in each battery cluster 2 and each converter 4 through liquid cooling pipes to deliver and recover the cooling liquid.

[0085] Specifically, referring to Figure 10 The liquid cooling pipes are provided in the energy storage container, and each group of the liquid cooling pipes corresponds to one battery cluster 2. After being connected to the outlet of the refrigeration device 7, the liquid cooling pipes in each group pass through each battery pack 3 in the battery cluster 2 and then reach the corresponding converter 4. After being connected in parallel at the position of the converter 4, the liquid cooling pipes in each group return the cooling liquid to the refrigeration device 7.

[0086] It should be noted that Figure 10 The arrows in Embodiment 4 for indicating the delivery direction of the cooling liquid are only for illustration and do not mean that the cooling liquid is delivered in the direction indicated by the arrows in actual application, and they do not constitute a limitation on the technical solutions described in Embodiment 4.

[0087] Embodiment 5

[0088] Embodiment 5 differs from Embodiment 1 in that the refrigeration device 7 in Embodiment 5 includes an air cooling refrigeration device and a liquid cooling refrigeration device. The air cooling refrigeration device delivers cooling air to each converter 4 through an air cooling channel provided in the energy storage box 1, and the liquid cooling refrigeration device delivers and recovers the cooling liquid through liquid cooling pipes to each battery pack 3 in each battery cluster 2. The energy storage box 1 is provided with air outlets on both sides in the width direction and on the ends in the length direction of the conversion part 40.

[0089] The part for heat dissipation through the air cooling refrigeration device can refer to Embodiments 1 and 3, and the part for heat dissipation through the liquid cooling refrigeration device can refer to Embodiments 2 and 4.

[0090] Embodiment 6

[0091] Embodiment 6 differs from Embodiment 1 in that the refrigeration part 70, the battery part 30 and the conversion part 40 are independent box members which are sequentially assembled and fixed to form the energy storage box 1.

[0092] The above description of the specification and embodiments is for the purpose of explaining the scope of protection of the present application and does not constitute a limitation on the scope of protection of the present application. Through the inspiration of the present application or the above embodiments, those skilled in the art can obtain the modification, equivalent replacement or other improvement of the embodiments of the present application or part of the technical features thereof by combining the common knowledge, the ordinary technical knowledge in the art and / or the prior art through logical analysis, reasoning or limited experiments, which shall be included in the protection scope of the present application.

Claims

1. An energy storage container, characterized in that, The application relates to a storage energy box body (1) comprising a refrigeration part (70), a battery part (30) and a converter part (40), wherein the converter part (40) is located at the end of the length direction of the storage energy box body (1); a plurality of battery clusters (2), each of which comprises a plurality of battery packs (3) connected in series and / or parallel, and each of the battery clusters (2) is distributed in parallel in the width direction of the storage energy box body (1) to form two battery cluster groups in the battery part (30); a plurality of converters (4), each of which is connected with each of the battery clusters (2) in one-to-one correspondence, and each of the converters (4) is distributed in parallel in the width direction of the storage energy box body (1) to form two converter groups in the converter part (40); and a refrigerator (7) installed in the refrigeration part (70) and adapted to adjust the temperature of each battery pack (3) in each battery cluster (2) and the converter (4). The refrigeration part (70), the battery part (30) and the converter part (40) are sequentially arranged and separated from each other in the length direction of the storage energy box body (1). When the refrigerator (7) is an air-cooled refrigeration device, the storage energy box body (1) forms an air-cooled channel in the battery part (30) and the converter part (40), the refrigerator (7) is adapted to transport cooling air to the battery pack (3) in each battery cluster (2) and each converter (4) through the air-cooled channel, the storage energy box body (1) is provided with air outlets on both sides in the width direction and the end in the length direction corresponding to the converter part (40), and the cooling air is output from the refrigerator (7), passes through the battery part (30) to the converter part (40), and is sent out of the storage energy box body (1) through the air outlets at the converter part (40). When the refrigerator (7) is a liquid-cooled refrigeration device, the liquid-cooled pipe is communicated with the battery pack (3) in each battery cluster (2) and each converter (4) to transport and recover the cooling liquid, the cooling liquid is output from the refrigerator (7), passes through the battery pack (3) in each battery cluster (2), and is returned to the refrigerator (7) through each converter (4). Corresponding to the position of each battery cluster group in the width direction of the storage energy box body (1) where each battery cluster is located, the front end of the battery cluster (2) faces the outside of the storage energy box body (1), and the rear end faces the other battery cluster group; corresponding to the position of each converter group in the width direction of the storage energy box body (1) where each converter is located, the front end of the converter (4) faces the outside of the storage energy box body (1), and the rear end faces the other converter group. The refrigerator (7) comprises an air-cooled refrigeration device and a liquid-cooled refrigeration device, the air-cooled refrigeration device transports cooling air to each converter (4) through the air-cooled channel arranged in the storage energy box body (1), and the liquid-cooled refrigeration device communicates with the battery pack (3) in each battery cluster (2) through the liquid-cooled pipe to transport and recover the cooling liquid; the storage energy box body (1) is provided with air outlets on both sides in the width direction and the end in the length direction corresponding to the converter part (40). ​ ​ 2. An energy storage container as claimed in claim 1, wherein, ​ 3. An energy storage container as claimed in claim 2, wherein, ​ 4. An energy storage container as claimed in claim 1, characterized in that Each of the battery clusters (2) has the battery packs (3) arranged in sequence along the height direction of the energy storage box (1); and each of the battery clusters (2) in each of the battery cluster groups is arranged in sequence along the length direction of the energy storage box (1).

5. An energy storage container as claimed in claim 1, characterized in that Each of the battery clusters (2) has the battery packs (3) arranged in sequence along the length direction of the energy storage box (1); and each of the battery clusters (2) in each of the battery cluster groups is arranged in sequence along the height direction of the energy storage box (1).

6. An energy storage container as claimed in claim 4 or 5, wherein, The battery clusters (2) in the same battery cluster group are separated from each other and are in communication with the adjacent battery clusters (2) in the other battery cluster group.

7. An energy storage container as claimed in claim 1, characterized in that The energy storage box (1) is provided with openings on both sides in the width direction corresponding to the battery part (30) and the converter part (40), and the battery packs (3) and the converters (4) are adapted to be loaded into or removed from the battery part (30) and the converter part (40) through the corresponding openings.

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