Energy storage system and power consumption system

Abstract

The present application relates to an energy storage system and a power consumption system. The energy storage system comprises: an energy storage container and a converter apparatus, wherein the energy storage container comprises a plurality of battery clusters; each battery cluster comprises a high-voltage controller and a plurality of battery packs sequentially connected in series, the high-voltage controller is electrically connected to the plurality of battery packs, and the high-voltage controller is used for controlling the plurality of battery packs to perform charging and discharging; and the converter apparatus is electrically connected to the high-voltage controller of at least one of the plurality of battery clusters, and the converter apparatus is used for performing mutual conversion between a direct current and an alternating current.

Description

Energy storage system and power utilization system

[0001] The present application claims priority to the Chinese patent application No. 202410438244.1, filed on April 12, 2024, and entitled "Energy storage system and power utilization system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of energy storage, in particular to an energy storage system and a power utilization system. BACKGROUND

[0003] The energy storage system can realize all-round monitoring and energy scheduling management of the working state of the energy storage power station. The common energy storage system includes an energy storage container and an energy storage converter. The energy storage container includes a plurality of battery clusters and a bus battery cabinet. The plurality of battery clusters are connected in parallel and are connected in parallel through the bus battery cabinet to realize electrical connection between the energy storage container and the energy storage converter. The energy storage converter can convert direct current and alternating current to each other, thereby realizing connection between the energy storage container and the power grid or an alternating current side power load. However, with the development of energy storage products, the integration of the energy storage container is higher and higher, and the power of the corresponding energy storage converter is higher and higher, which increases the production cost of the energy storage converter and the energy storage system. SUMMARY

[0004] In view of this, the present application provides an energy storage system and a power utilization system. The energy storage system can flexibly select a converter device, and the production cost of the converter device and the energy storage system is low.

[0005] The present application provides an energy storage system, which includes an energy storage container and a converter device. The energy storage container includes a plurality of battery clusters. Each battery cluster includes a high-voltage controller and a plurality of battery packs connected in series. The high-voltage controller is electrically connected to the plurality of battery packs. The high-voltage controller is used to control the plurality of battery packs to charge and discharge. The converter device is electrically connected to the high-voltage controller of at least one of the plurality of battery clusters. The converter device is used to convert direct current and alternating current to each other.

[0006] The present application also provides a power utilization system, which includes a user load and the energy storage system provided by the present application. The energy storage system is used to supply power to the user load.

[0007] In the present application, the plurality of battery packs are connected in series, and the high-voltage controller is electrically connected with the plurality of battery packs, and the high-voltage controller is used to control the plurality of battery packs to charge and discharge, in other words, the high-voltage controller can control the plurality of battery packs to start charging and discharging or stop charging and discharging, so as to realize the charging and discharging management of the battery packs. In the energy storage system, the energy storage container does not include a bus battery cabinet, and the high-voltage controller of at least one of the plurality of battery clusters is electrically connected with the converter device, so that the plurality of battery clusters do not need to pass through the bus battery cabinet to be connected in parallel, and are directly electrically connected with the converter device. On the one hand, the loss caused by the contact resistance in the process of electrical connection switching between the battery cluster and the converter device can be reduced, and the space occupied by the bus battery cabinet in the energy storage container can be saved, so as to improve the current density of the energy storage container. On the other hand, the high-voltage controller of at least one of the plurality of battery clusters is electrically connected with the converter device, and the sum of the power of the converter device and the rated power of the battery cluster electrically connected therewith is equal, so that by adjusting the number of battery clusters electrically connected with the converter device, different converter devices can be selected to be matched therewith. Correspondingly, for a specific converter device, the number of battery clusters electrically connected therewith can also be selected to be adjusted, so as to realize the matching between the converter device and the battery cluster, thereby improving the flexibility of the converter device arranged in the energy storage system. In the scheme in which the plurality of battery clusters pass through the bus battery cabinet to be connected in parallel and are electrically connected with the converter device, the converter device can only be electrically connected with all the battery clusters in the energy storage container through the bus battery cabinet. Therefore, when the total power of the energy storage container is determined, the energy storage system can only select a converter device with a rated power equal to the sum of the rated powers of all the battery clusters in the energy storage container, and the selection flexibility of the converter device is low. In addition, as the rated power of each battery cluster increases, the total rated power of the energy storage container also increases. If the converter device is electrically connected with all the battery clusters in the energy storage container through the bus battery cabinet, the rated power of the converter device has a higher requirement, which increases the production cost of the converter device. In the present application, the converter device can be flexibly selected to be electrically connected with the high-voltage controller of at least one of the plurality of battery clusters in the energy storage container. When the rated power of the battery cluster increases, the converter device can be matched with the battery cluster by reducing the number of electrically connected battery clusters, so as to reduce the power requirement of the converter device, which is beneficial to reduce the production cost of the converter device, and then reduce the production cost of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are some of the embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0009] Fig. 1 is a structural schematic diagram of an energy storage system according to an embodiment of the present application;

[0010] Fig. 2 is a circuit block diagram of the energy storage system according to an embodiment of the present application;

[0011] Fig. 3 is a schematic diagram of an electrical connection relationship of an energy storage system according to another embodiment of the present application;

[0012] Fig. 4 is a schematic diagram of a partial structure of an energy storage system according to an embodiment of the present application;

[0013] Fig. 5 is a schematic diagram of a partial structure of an energy storage system according to another embodiment of the present application;

[0014] Fig. 6 is an enlarged view of the A dashed box in Fig. 4;

[0015] Fig. 7 is an enlarged view of the B dashed box in Fig. 5;

[0016] Fig. 8 is a schematic diagram of a mounting rack according to an embodiment of the present application;

[0017] Fig. 9 is a circuit block diagram of an electricity utilization system according to an embodiment of the present application.

[0018] Legend: 100-energy storage system, 110-energy storage container, 111-battery cluster, 1111-high-voltage controller, 1112-battery pack, 1113-first positive port, 1114-first negative port, 1115-second positive port, 1116-second negative port, 120-current conversion device, 130-box body, 131-box main body, 1311-receiving cavity, 132-mounting rack, 133-first part, 1331-first mounting hole, 1332-first subpart, 1333-second subpart, 1334-third subpart, 1335-fourth subpart, 1336-fifth subpart, 134-second part, 135-third part, 1351-second mounting hole, 136-first reinforcing part, 137-second reinforcing part, 140-first wiring harness assembly, 141-first wiring harness, 1411-first plug-in part, 142-second wiring harness, 1421-second plug-in part, 150-second wiring harness assembly, 151-third wiring harness, 152-fourth wiring harness, 160-third wiring harness assembly, 161-fifth wiring harness, 162-sixth wiring harness, 163-seventh wiring harness, 200-electricity utilization system, 210-user load. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0020] The terms “first”, “second”, and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, rather than to describe a particular order. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product, or device.

[0021] Reference herein to “an embodiment” or “embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment or embodiments can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, or to mutually exclusive or alternative embodiments. It is expressly understood that the embodiments described herein can be combined with each other.

[0022] The energy storage system can realize all-round monitoring and energy scheduling management of the working state of the energy storage power station. The common energy storage system includes an energy storage container and an energy storage converter. The energy storage container includes a plurality of battery clusters and a bus battery cabinet. The plurality of battery clusters are connected in parallel and are connected through the bus battery cabinet to realize electrical connection between the energy storage container and the energy storage converter. The energy storage converter can convert direct current and alternating current to each other, thereby realizing connection between the energy storage container and the power grid or an alternating current side load. However, with the development of energy storage products, the integration of the energy storage container is increasingly high, and the power of the energy storage container is increasingly large, which increases the requirement for the power of the corresponding energy storage converter, thereby increasing the production cost of the energy storage converter and the energy storage system. In addition, the energy storage system can only select an energy storage converter with power equal to that of the plurality of battery clusters of the entire energy storage container, which limits the selection of the energy storage converter and reduces the flexibility of selecting the energy storage converter.

[0023] Commonly, the busbar battery cabinet is provided with a busbar device, the busbar device is composed of an insulation part and a busbar part, and all battery clusters in the energy storage container are connected in parallel and then are connected through the busbar battery cabinet. Specifically, the busbar part and the insulation part need to use additional materials, which increases the production cost of the energy storage container. In addition, each battery cluster is first electrically connected with the busbar battery cabinet and then is electrically connected with the energy storage converter. In the process of multiple electrical connection switching, the electric quantity of the battery cluster is lost due to the existence of contact resistance, and the heat generation is large, causing the loss of system electric energy and high energy storage system loss. Furthermore, the busbar battery cabinet occupies the space of the energy storage container, which reduces the energy density of the energy storage container. In the existing scheme, one energy storage converter can only pass through the busbar battery cabinet and correspond to one container or multiple containers.

[0024] Please refer to FIG. 1 and FIG. 2, the present application provides an energy storage system 100, the energy storage system 100 includes: an energy storage container 110 and a converter device 120, the energy storage container 110 includes: a plurality of battery clusters 111, the battery cluster 111 includes a high-voltage controller 1111 and a plurality of battery packs 1112 connected in series, the high-voltage controller 1111 is electrically connected with the plurality of battery packs 1112, and the high-voltage controller 1111 is used for controlling the plurality of battery packs 1112 to charge and discharge; the converter device 120 is electrically connected with the high-voltage controller 1111 of at least one of the plurality of battery clusters 111, and the converter device 120 is used for converting direct current and alternating current.

[0025] It can be understood that the converter device 120 is electrically connected with at least one of the plurality of battery clusters 111.

[0026] It can be understood that when the energy storage container 110 is charged externally, the converter device 120 converts the current from the outside into direct current and stores it in the energy storage container 110; when the energy storage container supplies power to the outside, the converter device 120 converts the current of the energy storage container 110 into alternating current and outputs it to the outside.

[0027] In the terms of the present application, "a plurality of" means greater than or equal to two, which can be but is not limited to two, three, four, five, six, seven, eight, nine or ten, etc.; "at least one" means one or more, which can be but is not limited to one, two, three, four, five, six, seven, eight, nine or ten, etc.

[0028] Optionally, the high-voltage controller 1111 is configured to control, monitor and protect the plurality of battery packs 1112 electrically connected thereto. The high-voltage controller 1111 can monitor the temperature, voltage, current and other parameters of the plurality of battery packs 1112. When the parameters exceed the set threshold, the high-voltage controller 1111 will automatically start the protection mechanism, such as cutting off the circuit, etc.

[0029] In the embodiment, the plurality of battery packs 1112 are connected in series, and the high-voltage controller 1111 is electrically connected with the plurality of battery packs 1112, and the high-voltage controller 1111 is configured to control the plurality of battery packs 1112 to charge and discharge. In other words, the high-voltage controller 1111 can control the plurality of battery packs 1112 to start or stop charging and discharging, so as to manage the charging and discharging of the battery packs 1112. In the energy storage system 100, the energy storage container 110 does not include a bus battery cabinet, and the power conversion device 120 is electrically connected with the high-voltage controller 1111 of at least one of the plurality of battery clusters 111, so that the plurality of battery clusters 111 do not need to pass through the bus battery cabinet for bus connection, and are directly electrically connected with the power conversion device 120. On the one hand, the electrical connection switching process of the battery cluster 111 and the power conversion device 120 can reduce the loss caused by the contact resistance, and the space occupied by the bus battery cabinet in the energy storage container 110 can be saved, so as to improve the current density of the energy storage container 110. On the other hand, the power conversion device 120 is electrically connected with the high-voltage controller 1111 of at least one of the plurality of battery clusters 111, and the sum of the power of the power conversion device 120 and the rated power of the battery cluster 111 electrically connected therewith is equal. By adjusting the number of battery clusters 111 electrically connected with the power conversion device 120, different power conversion devices 120 can be selected to be matched. Correspondingly, for a specific power conversion device 120, the number of battery clusters 111 electrically connected therewith can be selected to be adjusted, so as to match the power conversion device 120 and the battery cluster 111, thereby improving the flexibility of the power conversion device 120 arranged in the energy storage system 100. In the scheme in which the plurality of battery clusters 111 pass through the bus battery cabinet for bus connection and are electrically connected with the power conversion device 120, the power conversion device 120 can only be electrically connected with all the battery clusters 111 in the energy storage container 110 through the bus battery cabinet. Therefore, when the total power of the energy storage container 110 is determined, the energy storage system 100 can only select a power conversion device 120 with a rated power equal to the sum of the rated powers of all the battery clusters 111 in the energy storage container 110. The selection flexibility of the power conversion device 120 is low. In addition, as the rated power of each battery cluster 111 increases, the total rated power of the energy storage container 110 also increases. If the power conversion device 120 is electrically connected with all the battery clusters 111 in the energy storage container 110 through the bus battery cabinet, the rated power of the power conversion device 120 is required to be higher, which increases the production cost of the power conversion device 120.In the embodiment, the converter device 120 can flexibly select the high-voltage controller 1111 of at least one of the plurality of battery clusters 111 in the energy storage container 110 to be electrically connected. When the rated power of the battery cluster 111 is increased, the converter device 120 can realize the adaptation with the battery cluster 111 by reducing the number of the battery clusters 111 electrically connected, thereby reducing the power requirement of the converter device 120, which is conducive to reducing the production cost of the converter device 120, and then realizing the reduction of the production cost of the energy storage system 100.

[0030] Specifically, the selection process of the converter device 120 in the scheme in which the plurality of battery clusters 111 are connected through the busbar battery cabinet and electrically connected with the converter device 120 and the scheme provided in the embodiments is analyzed, so as to embody that the flexibility of the selection of the converter device 120 in the energy storage system 100 of the embodiment is higher.

[0031] Firstly, in the scheme in which the plurality of battery clusters 111 are connected through the busbar battery cabinet and electrically connected with the converter device 120, it is assumed that the energy storage container 110 includes 10 parallel battery clusters 111, and the electric quantity of each battery cluster 111 is 334kw. Therefore, the total electric quantity of all the battery clusters 111 in the energy storage container 110 is 3440kw. If the charging and discharging is performed at a rate of 0.5P, the total power of all the battery clusters 111 in the energy storage container 110 is 1720kw. In this scheme, only the converter device 120 with a rated power of 1720kw can be selected to adapt to the energy storage container 110.

[0032] Secondly, in the scheme of the embodiment, the plurality of battery clusters 111 do not need to be connected through the busbar battery cabinet, and the converter device 120 is electrically connected with the high-voltage controller 1111 of at least one of the plurality of battery clusters 111. It is assumed that the energy storage container 110 includes 10 battery clusters 111, and the electric quantity of each battery cluster 111 is 344kw. If the charging and discharging is performed at a rate of 0.5P, the total power of all the battery clusters 111 in the energy storage container 110 is 172kw. In the scheme of the embodiment, the converter device 120 with a rated power of 172kw, 344kw, 516kw, 688kw, 860kw, 1032kw, 1204kw, 1376kw, 1548kw or 1720kw can be selected to adapt to at least one of the battery clusters 111 in the energy storage container 110.

[0033] It can be understood that the power of each battery cluster 111 ranges from 200kw to 1800kw. Specifically, the power of each battery cluster 111 can be, but is not limited to, 200kw, 300kw, 344kw, 372kw, 650kw, 833kw, 1000kw, 1200kw, 1380kw, 1500kw, 1680kw, 1800kw, and the like.

[0034] Referring to FIG. 3, in some embodiments, the number of the energy storage containers 110 in the energy storage system 100 is at least one, and the number of the power conversion devices 120 is at least one.

[0035] In some embodiments, the power conversion device 120 is electrically connected to at least one battery cluster 111 of one energy storage container 110, and in other embodiments, the power conversion device 120 is electrically connected to at least one battery cluster 111 of multiple energy storage containers 110. The power conversion device 120 in the energy storage system 100 is arranged flexibly, which is conducive to improving the flexibility of the selection of the power conversion device 120. In addition, when the rated power of the battery cluster 111 is large, the power conversion device 120 can select the number of battery clusters 111 to be electrically connected according to its rated power, so as to avoid the power conversion device 120 from being scrapped due to not meeting the power requirement of the energy storage container 110, which is conducive to improving the applicability of the power conversion device 120. In addition, the requirement for the power of the power conversion device 120 can be reduced, thereby reducing the requirement for the power conversion device 120 in the preparation process, which is conducive to reducing the production cost of the energy storage system 100.

[0036] In the embodiment of FIG. 3, the power conversion device 120 can be electrically connected to part of the battery clusters 111 of one energy storage container 110, and the power conversion device 120 can also be electrically connected to part of the battery clusters 111 of two energy storage containers 110.

[0037] In some embodiments, when the at least one is multiple, at least one high-voltage controller 1111 electrically connected to the power conversion device 120 is in parallel connection, and the rated power of the power conversion device 120 is equal to the sum of the rated powers of at least one battery cluster 111.

[0038] In the embodiment, when the current conversion device 120 is electrically connected to the high-voltage controller 1111 of at least one of the plurality of battery clusters 111, at least one of the plurality of battery clusters 111 is arranged in parallel and then in series with the high-voltage controller 1111, so that the current conversion device 120 can control each of the battery clusters 111 respectively. In addition, the rated power of the current conversion device 120 is equal to the sum of the rated powers of at least one of the battery clusters 111, which is beneficial for the operator to select a current conversion device 120 with a specific power according to the rated power of at least one of the battery clusters 111 and the specific number of the battery clusters 111 electrically connected to the current conversion device 120; in addition, the operator can also select the specific number of the battery clusters 111 electrically connected to the current conversion device 120 according to the rated power of the current conversion device 120, which improves the flexibility of the current conversion device 120 applied to the energy storage system 100, and also reduces the power requirement of the energy storage converter of the energy storage container 110, which is beneficial for reducing the production cost of the energy storage converter, and in turn reduces the production cost of the energy storage system 100.

[0039] Referring to FIGS. 4 and 5, in some embodiments, the energy storage container 110 further includes a box 130, the box 130 including a box body 131 having a receiving cavity 1311 and used for receiving the plurality of battery clusters 111, and a mounting bracket 132 fixed to the box 130; the energy storage system 100 further includes a plurality of first wiring harness assemblies 140 and a plurality of second wiring harness assemblies 150, one end of the first wiring harness assembly 140 being electrically connected to the high-voltage controller 1111, the end of the first wiring harness assembly 140 away from the high-voltage controller 1111 being fixed to the mounting bracket 132, one end of the second wiring harness assembly 150 being electrically connected to the current conversion device 120, and the end of the second wiring harness assembly 150 away from the current conversion device 120 being inserted into the end of the first wiring harness assembly 140 away from the high-voltage controller 1111, so as to achieve the electrical connection between the high-voltage controller 1111 and the current conversion device 120.

[0040] It can be understood that the opposite ends of the first wiring harness assembly 140 are respectively mounted to the high-voltage controller 1111 and the mounting bracket 132, and the opposite ends of the second wiring harness assembly 150 are respectively mounted to the current conversion device 120 and the mounting bracket 132.

[0041] Optionally, the way in which one end of the first wiring harness assembly 140 is electrically connected to the high-voltage controller 1111 can be, but is not limited to, plug-in connection, threaded connection, pressure connection, or terminal connection, etc.

[0042] Optionally, the manner that one end of the second wiring harness 142 is electrically connected to the power conversion device 120 can be, but is not limited to, plug-in connection, threaded connection, crimp connection, terminal connection, etc.

[0043] In the embodiment, the high-voltage controller 1111 is electrically connected to the power conversion device 120 through the first wiring harness assembly 140 and the second wiring harness assembly 150. Specifically, one end of the first wiring harness assembly 140 is electrically connected to the high-voltage controller 1111, and the end of the first wiring harness assembly 140 away from the high-voltage controller 1111 is fixed to the mounting frame 132. On the one hand, this facilitates the electrical connection between the first wiring harness assembly 140 and the second wiring harness assembly 150. On the other hand, one first wiring harness assembly 140 is used to electrically connect the high-voltage controller 1111 of one battery cluster 111 to the second wiring harness assembly 150, and the end of each first wiring harness assembly 140 away from the high-voltage controller 1111 is fixed to the mounting frame 132, which facilitates the arrangement of the first wiring harness assembly 140 in the energy storage container 110 to be more tidy and improves the space utilization rate inside the energy storage container 110. Further, one end of the second wiring harness assembly 150 is electrically connected to the power conversion device 120, and the end of the second wiring harness assembly 150 away from the power conversion device 120 is plugged into the first wiring harness assembly 140 fixed to the mounting frame 132 to achieve quick communication between the first wiring harness assembly 140 and the second wiring harness assembly 150, which in turn facilitates the efficiency of the electrical connection of the high-voltage controller 1111 and the power conversion device 120 by the operator. The embodiments of the present application improve the flexibility of selecting the power conversion device 120 and also improve the efficiency of the electrical connection between the power conversion device 120 and the high-voltage controller 1111 of at least one battery cluster 111.

[0044] Optionally, the number of battery clusters 111 is equal to the number of first wiring harness assemblies 140, and the number of first wiring harnesses 141 is equal to the number of second wiring harness assemblies 150. One first wiring harness assembly 140 and one second wiring harness assembly 150 are provided for one battery cluster 111.

[0045] Please refer to FIG. 6 and FIG. 7, in some embodiments, the high-voltage controller 1111 has a first positive port 1113 and a first negative port 1114, the first wire harness assembly 140 includes a first wire harness 141 and a second wire harness 142, one end of the first wire harness 141 is plugged into the first positive port 1113, the end of the first wire harness 141 away from the first positive port 1113 has a first plug-in part 1411 and the first plug-in part 1411 is fixed to the mounting frame 132; one end of the second wire harness 142 is plugged into the first negative port 1114, the end of the second wire harness 142 away from the first negative port 1114 has a second plug-in part 1421 and the second plug-in part 1421 is fixed to the mounting frame 132; the second wire harness assembly 150 includes a third wire harness 151 and a fourth wire harness 152, the opposite ends of the third wire harness 151 are respectively connected to the current conversion device 120 and the first plug-in part 1411, the opposite ends of the fourth wire harness 152 are respectively connected to the current conversion device 120 and the second plug-in part 1421.

[0046] In the embodiment, the first positive port 1113, the first wire harness 141, the third wire harness 151, the current conversion device 120, the fourth wire harness 152, the second wire harness 142 and the first negative port 1114 are sequentially connected to form a closed loop in the electrical connection loop between the high-voltage controller 1111 and the current conversion device 120. The high-voltage controller 1111 has the first positive port 1113 and the first negative port 1114, the first positive port 1113 is used for inserting the first wire harness 141, and the first negative port 1114 is used for inserting the second wire harness 142. When the first positive port 1113, the first wire harness 141, the third wire harness 151, the current conversion device 120, the fourth wire harness 152, the second wire harness 142 and the first negative port 1114 are sequentially connected, the high-voltage controller 1111 is electrically connected with the current conversion device 120. The current conversion device 120 converts the external current into direct current and stores it in the battery cluster 111 where the high-voltage controller 1111 is located, or converts the current of the battery cluster 111 where the high-voltage controller 1111 is located into alternating current and outputs it to the outside to supply power to the external electrical devices. Specifically, one end of the first wire harness 141 away from the first positive port 1113 has the first plug-in part 1411, and the first plug-in part 1411 is fixed on the mounting frame 132. One end of the second wire harness 142 away from the first negative port 1114 has the second plug-in part 1421, and the second plug-in part 1421 is fixed on the mounting frame 132. During the process of inserting the first plug-in part 1411 and the fourth wire harness 152 into the second plug-in part 1421, the mounting frame 132 provides support for the first plug-in part 1411 and the second plug-in part 1421, which is conducive to improving the efficiency of the operator in electrically connecting the first wire harness 141 and the third wire harness 151 and the efficiency of electrically connecting the second wire harness 142 and the fourth wire harness 152, in other words, it is conducive to improving the efficiency of the operator in electrically connecting the high-voltage controller 1111 and the current conversion device 120.

[0047] Please refer to FIG. 8, in some embodiments, the mounting frame 132 comprises a first portion 133, a second portion 134 and a third portion 135 connected in a bent manner, the first portion 133 and the third portion 135 are arranged at opposite sides of the second portion 134, and the first portion 133 and the third portion 135 are fixed to the box body 131 respectively; the first portion 133 has a plurality of first mounting holes 1331 arranged in sequence along the extension direction of the first portion 133, and the first mounting holes 1331 are used for arranging the first plug-in portion 1411; the third portion 135 has a plurality of second mounting holes 1351 arranged in sequence along the extension direction of the third portion 135, and the second mounting holes 1351 are used for arranging the second plug-in portion 1421, and the extension direction of the first portion 133 is parallel to the extension direction of the third portion 135.

[0048] It can be understood that the first portion 133 and the third portion 135 are not coplanar.

[0049] In the present embodiment, the first portion 133 and the third portion 135 are arranged at opposite sides of the second portion 134, the first portion 133 and the third portion 135 are not coplanar, and the first portion 133 has a plurality of first mounting holes 1331 arranged in sequence along the extension direction of the first portion 133, and the third portion 135 has a plurality of second mounting holes 1351 arranged in sequence along the extension direction of the third portion 135. When the first plug-in portion 1411 is plugged into the first mounting hole 1331 and the second plug-in portion 1421 is plugged into the second mounting hole 1351, the first portion 133 and the third portion 135 are not coplanar, in other words, the first plug-in portion 1411 and the second plug-in portion 1421 are arranged staggered. On the one hand, it can avoid the first plug-in portion 1411 and the second plug-in portion 1421 interfering with each other, and can avoid the first wire harness 141 and the second wire harness 142 interfering with each other; on the other hand, when the third wire harness 151 is connected to the first plug-in portion 1411 and the fourth wire harness 152 is connected to the second plug-in portion 1421, it can also avoid the end of the third wire harness 151 close to the first plug-in portion 1411 and the end of the fourth wire harness 152 close to the second plug-in portion 1421 interfering with each other, which is conducive to improving the regularity of arranging the first wire harness assembly 140 and the second wire harness assembly 150 in the energy storage system 100, so that the electrical connection relationship between the high-voltage controller 1111 and the current conversion device 120 is stable, and then the current conversion device 120 can convert the direct current into alternating current for the battery cluster 111 connected by electricity.

[0050] In some embodiments, the first mounting hole 1331 and the second mounting hole 1351 are arranged alternately along the extension direction parallel to the first portion 133.

[0051] In the embodiment, the first mounting holes 1331 and the second mounting holes 1351 are arranged alternately along the extending direction of the first part 133, in other words, one first mounting hole 1331 is arranged between two second mounting holes 1351, and one second mounting hole 1351 is arranged between two first mounting holes 1331. When the first plug-in part 1411 is arranged in the first mounting hole 1331 and the second plug-in part 1421 is arranged in the second mounting hole 1351, the first plug-in part 1411 and the second plug-in part 1421 are arranged alternately along the extending direction of the first part 133, which can avoid the interference between the first plug-in part 1411 and the second plug-in part 1421, and is also conducive to avoiding the interference between the first wire harness 141 and the second wire harness 142, and avoiding the interference between the third wire harness 151 and the fourth wire harness 152. In addition, when one end of the third wire harness 151 away from the current conversion device 120 is plugged with the first plug-in part 1411, and one end of the fourth wire harness 152 away from the current conversion device 120 is plugged with the second plug-in part 1421, the end of the third wire harness 151 close to the first plug-in part 1411 can avoid interfering with the end of the fourth wire harness 152 close to the second plug-in part 1421, thereby facilitating to improve the stability of the electrical connection between the current conversion device 120 and the high-voltage controller 1111.

[0052] In some embodiments, along the extending direction of the first part 133, the first part 133 comprises first, second, third, fourth and fifth sub-parts 1332, 1333, 1334, 1335 and 1336 connected by bending, the first and third sub-parts 1332 and 1334 are bent in opposite directions relative to the second sub-part 1333, the second and fourth sub-parts 1333 and 1335 are bent in the same side relative to the third sub-part 1334, and the third and fifth sub-parts 1334 and 1336 are bent in opposite directions relative to the fourth sub-part 1335, the third sub-part 1334 has the first mounting hole 1331, and the first and fifth sub-parts 1332 and 1336 are connected to the box 130.

[0053] It can be understood that the first part 133 and the third part 135 are not coplanar, and the first part 133 protrudes in a direction away from the battery cluster 111 compared to the third part 135.

[0054] Optionally, the first, second, third, fourth and fifth sub-parts 1332, 1333, 1334, 1335 and 1336 are symmetrically distributed.

[0055] In the embodiment, the first part 133 protrudes away from the battery cluster 111 compared with the third part 135, in particular, the third sub-part 1334 is farther away from the battery cluster 111 compared with the third part 135, one end of the third sub-part 1334 is connected with the box 130 through the second sub-part 1333 and the first sub-part 1332, the other end of the third sub-part 1334 is connected with the box 130 through the fourth sub-part 1335 and the fifth sub-part 1336. By bending the first sub-part 1332 and the third sub-part 1334 respectively in opposite directions compared with the second sub-part 1333, bending the second sub-part 1333 and the fourth sub-part 1335 respectively in the same direction compared with the third sub-part 1334, and bending the third sub-part 1334 and the fifth sub-part 1336 respectively in opposite directions compared with the fourth sub-part 1335, the first part 133 and the third part 135 are arranged on opposite sides of the second part 134. In particular, when the first mounting hole 1331 of the third sub-part 1334 is used to mount the first plug-in part 1411 and the second mounting hole 1351 of the third part 135 is used to mount the second plug-in part 1421, the mutual interference of the first plug-in part 1411 and the second plug-in part 1421 can be avoided, and the mutual interference of the first wire harness 141 and the second wire harness 142 and the mutual interference of the third wire harness 151 and the fourth wire harness 152 can also be avoided, so that the electrical connection relationship between the battery cluster 111 and the current conversion device 120 is stable.

[0056] In some embodiments, the mounting bracket 132 further comprises a first reinforcing part 136 and a second reinforcing part 137, the first reinforcing part 136 is bent and connected to one side of the first part 133 away from the second part 134, the first reinforcing part 136 is bent in the same direction as the second part 134 relative to the first part 133, the second reinforcing part 137 is bent and connected to one side of the third part 135 away from the second part 134, the second reinforcing part 137 is bent in the same direction as the second part 134 relative to the third part 135.

[0057] In the embodiment, the first reinforcing part 136 is bent and connected with the first part 133, the first reinforcing part 136 is bent with the second part 134 relative to the first part 133 towards the same side, and the first reinforcing part 136 is beneficial to improve the structural strength of the first part 133. When the first plug-in part 1411 is arranged in the first mounting hole 1331 of the first part 133, and one end of the third wire harness 151 away from the converter 120 is plugged into the first plug-in part 1411, the first reinforcing part 136 can avoid the first part 133 from being bent in the process that the third wire harness 151 is plugged into or pulled out of the first plug-in part 1411, thereby being beneficial to prolong the service life of the first part 133 and the service life of the mounting rack 132, and also being beneficial to improve the efficiency of electrically connecting the first wire harness 141 and the third wire harness 151. Similarly, the second reinforcing part 137 is bent and connected with the third part 135, the second reinforcing part 137 is bent with the second part 134 relative to the third part 135 towards the same side, and the second reinforcing part 137 is beneficial to improve the structural strength of the third part 135. When the second plug-in part 1421 is arranged in the second mounting hole 1351 of the third part 135, and one end of the fourth wire harness 152 away from the converter 120 is plugged into the second plug-in part 1421, the second reinforcing part 137 can avoid the third part 135 from being bent in the process that the fourth wire harness 152 is plugged into or pulled out of the second plug-in part 1421, thereby being beneficial to prolong the service life of the third part 135 and the service performance of the mounting rack 132, and also being beneficial to improve the efficiency of electrically connecting the second wire harness 142 and the fourth wire harness 152.

[0058] In some embodiments, the energy storage system 100 further comprises a third wire harness assembly 160 for realizing series connection of the plurality of battery packs 1112 of the battery cluster 111 and electric connection of the battery pack 1112 and the high-voltage controller 1111; the third wire harness assembly 160 comprises a fifth wire harness 161, a sixth wire harness 162 and a seventh wire harness 163, the high-voltage controller 1111 further has a second positive port 1115 and a second negative port 1116, the fifth wire harness 161 is used for connecting the plurality of battery packs 1112 in the same battery cluster 111 in series to form a battery string, opposite ends of the sixth wire harness 162 are connected with the second positive port 1115 and one end of the battery string respectively, and opposite ends of the seventh wire harness 163 are connected with the second negative port 1116 and the other end of the battery string respectively.

[0059] It can be understood that the battery string, the high-voltage controller 1111 and the converter 120 are electrically connected in sequence in series connection mode.

[0060] It can be understood that, in the high-voltage controller 1111, the first positive port 1113, the first negative port 1114, the second positive port 1115 and the second negative port 1116 are arranged at intervals.

[0061] In the embodiment, the third wire harness assembly 160 includes a fifth wire harness 161, a sixth wire harness 162 and a seventh wire harness 163, wherein the fifth wire harness 161 is used to connect the plurality of battery packs 1112 in the same battery cluster 111 in series to form a battery string, in other words, the fifth wire harness 161 is in a plurality of pieces, and the opposite ends of each piece of the fifth wire harness 161 are respectively connected to different battery packs 1112 to connect the plurality of battery packs 1112 in series to form a battery string, and the battery string and the high-voltage controller 1111 are connected in series. In the electrical connection loop of the battery string and the high-voltage controller 1111, the second positive port 1115, the sixth wire harness 162, the battery string, the seventh wire harness 163 and the second negative port 1116 are connected in sequence. Wherein, the end of the sixth wire harness 162 away from the second positive port 1115 and the end of the seventh wire harness 163 away from the second negative port 1116 are respectively connected to different battery packs 1112 to achieve the connection of the plurality of battery packs 1112 in the battery cluster 111 in series, and improve the regularity of the battery string wiring, thereby facilitating the electrical connection stability of the plurality of battery packs 1112 and the high-voltage controller 1111.

[0062] Optionally, the number of the third wire harness assembly 160 is equal to the number of the battery cluster 111, and one third wire harness assembly 160 is arranged corresponding to one battery cluster 111.

[0063] Please refer to FIG. 9, the application further provides a power utilization system 200, which comprises a user load 210 and the energy storage system 100 provided by the application, and the energy storage system 100 is used to supply power for the user load 210.

[0064] It can be understood that, the energy storage system 100 is electrically connected with the user load 210.

[0065] In the embodiment of the present application, the energy storage system 100 can flexibly select the current conversion device 120, and the production cost of the energy storage system 100 and the current conversion device 120 is low, and the electrical connection relationship between the battery cluster 111 and the current conversion device 120 in the energy storage system 100 is stable. When the energy storage system 100 is applied to the power utilization system 200 and supplies power to the user load 210, the current conversion device 120 is electrically connected to the user load 210 away from the other end of the energy storage container 110, and when the energy storage container 110 supplies power to the user load 210, the current conversion device 120 converts the current in the battery cluster 111 electrically connected thereto from direct current to alternating current for use by the user load 210. The energy storage system 100 provides stable current for the user load 210, so that the user load 210 can stably work. In addition, the production cost of the energy storage system 100 is low, which is conducive to reducing the cost of supplying power to the user load 210.

[0066] Optionally, the power utilization system 200 further comprises a power grid, and the power grid is electrically connected to the current conversion device 120 of the energy storage system 100.

[0067] It can be understood that the energy storage system 100 is electrically connected to the power grid through the current conversion device 120.

[0068] In the embodiment, the power grid, the current conversion device 120 and the plurality of battery clusters 111 are electrically connected in sequence to form a closed loop, and the power grid can be used to charge the energy storage system 100, and the energy storage system 100 can also supply power to the power grid. Specifically, when the power of the power grid is sufficient, the power grid is used to charge the energy storage system 100, the current conversion device 120 converts the alternating current output by the power grid into direct current and inputs the direct current into the battery cluster 111, and the battery cluster 111 is used to store the current input by the power grid. When the power grid is used for peak period or the power of the power grid is insufficient, the energy storage system 100 can supply power to the power grid, and the current conversion device 120 converts the direct current of the battery cluster 111 into alternating current and inputs the alternating current into the power grid to supplement the power of the power grid.

[0069] Optionally, the user load 210 can be, but is not limited to, a portable electronic device such as a mobile phone, a tablet computer, a notebook computer, a desktop computer, a smart bracelet, a smart watch, an e-book reader, a game console and the like. It can also be a vehicle such as a car, a truck, a sedan, a van, a motor train, a high-speed rail, an electric automatic vehicle and the like. In addition, it can also be various household appliances and the like.

[0070] Mentioning "embodiments" and "implementation methods" in this application means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrases in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments. In addition, it should be understood that the features, structures or characteristics described in the various embodiments of the present application can be arbitrarily combined to form another embodiment that does not deviate from the spirit and scope of the technical solution of the present application, unless there is a contradiction between them.

[0071] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the above preferred implementation modes, ordinary technicians in this field should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An energy storage system, wherein: The energy storage system comprises: An energy storage container, the energy storage container comprising: a plurality of battery clusters, the battery cluster comprising a high-voltage controller and a plurality of battery packs connected in series, the high-voltage controller being electrically connected to the plurality of battery packs, the high-voltage controller being configured to control the charging and discharging of the plurality of battery packs; and A converter device is electrically connected to a high-voltage controller of at least one of the plurality of battery clusters, and is used for converting direct current into alternating current.

2. The energy storage system according to claim 1, wherein: When the at least one is a plurality of the at least one high-voltage controllers electrically connected to the converter are connected in parallel, and the rated power of the converter is equal to the sum of the rated power of the at least one battery cluster.

3. The energy storage system according to claim 1, wherein: The energy storage container also includes a box body, which includes a box body and a mounting frame. The box body has a receiving cavity and is used to receive the multiple battery clusters. The mounting frame is fixed to the box body. The energy storage system also includes multiple first wiring harness assemblies and multiple second wiring harness assemblies. One end of the first wiring harness assembly is electrically connected to the high-voltage controller, and the end of the first wiring harness assembly facing away from the high-voltage controller is fixed to the mounting frame. One end of the second wiring harness assembly is electrically connected to the converter, and the end of the second wiring harness assembly facing away from the converter is plugged into the end of the first wiring harness assembly facing away from the high-voltage controller to achieve electrical connection between the high-voltage controller and the converter.

4. The energy storage system according to claim 3, wherein: The high-voltage controller has a first positive port and a first negative port, the first wiring harness assembly includes a first wiring harness and a second wiring harness, one end of the first wiring harness is plugged into the first positive port, the end of the first wiring harness facing away from the first positive port has a first plug-in portion and the first plug-in portion is fixed to the mounting bracket; one end of the second wiring harness is plugged into the first negative port, the end of the second wiring harness facing away from the first negative port has a second plug-in portion and the second plug-in portion is fixed to the mounting bracket; the second wiring harness assembly includes a third wiring harness and a fourth wiring harness, the opposite ends of the third wiring harness are respectively connected to the converter and the first plug-in portion, and the opposite ends of the fourth wiring harness are respectively connected to the converter and the second plug-in portion.

5. The energy storage system according to claim 4, wherein: The mounting frame includes a first portion, a second portion, and a third portion that are bent and connected to each other, the first portion and the third portion are arranged on opposite sides of the second portion, and the first portion and the third portion are respectively fixed to the box body; the first portion has a plurality of first mounting holes arranged in sequence along the extension direction of the first portion, and the first mounting holes are used to set the first plug-in portion; the third portion has a plurality of second mounting holes arranged in sequence along the extension direction of the third portion, and the second mounting holes are used to set the second plug-in portion, and the extension direction of the first portion is parallel to the extension direction of the third portion.

6. The energy storage system according to claim 5, wherein: The first mounting holes and the second mounting holes are alternately arranged along an extending direction parallel to the first portion.

7. The energy storage system according to claim 5, wherein: Along the extension direction parallel to the first part, the first part includes a first sub-part, a second sub-part, a third sub-part, a fourth sub-part and a fifth sub-part that are bent and connected to each other. The first sub-part and the third sub-part are bent in opposite directions relative to the second sub-part, the second sub-part and the fourth sub-part are bent toward the same side relative to the third sub-part, the third sub-part and the fifth sub-part are bent in opposite directions relative to the fourth sub-part, the third sub-part has the first mounting hole, and the first sub-part and the fifth sub-part are respectively connected to the box.

8. The energy storage system according to claim 5, wherein: The mounting frame also includes a first reinforcing portion and a second reinforcing portion, the first reinforcing portion is bent and connected to the side of the first portion away from the second portion, the first reinforcing portion and the second portion are bent toward the same side relative to the first portion, the second reinforcing portion is bent and connected to the side of the third portion away from the second portion, and the second reinforcing portion and the second portion are bent toward the same side relative to the third portion.

9. The energy storage system according to any one of claims 1 to 8, wherein: The energy storage system also includes a third wiring harness assembly, which is used to realize the series connection of multiple battery packs in the battery cluster and the electrical connection between the battery packs and the high-voltage controller; the third wiring harness assembly includes a fifth wiring harness, a sixth wiring harness and a seventh wiring harness, and the high-voltage controller also has a second positive port and a second negative port. The fifth wiring harness is used to connect multiple battery packs in the same battery cluster in series to form a battery string, the opposite ends of the sixth wiring harness are respectively connected to the second positive port and one end of the battery string, and the opposite ends of the seventh wiring harness are respectively connected to the second negative port and the other end of the battery string.

10. An electricity system, wherein: The power system includes: User load; and The energy storage system according to any one of claims 1 to 9, wherein the energy storage system is used to supply power to the user load.

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